本文主要是介绍Java工程师成神之路 --一篇非常好的文章，让人获益匪浅！！！，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
一、基础篇
1.1 JVM
1.1.1. Java内存模型，Java内存管理，Java堆和栈，垃圾回收
http://www.jcp.org/en/jsr/detail?id=133
http://ifeve.com/jmm-faq/
1.1.2. 了解JVM各种参数及调优
1.1.3. 学习使用Java工具
jps, jstack, jmap, jconsole, jinfo, jhat, javap, …
http://kenai.com/projects/btrace
http://www.crashub.org/
https://github.com/taobao/TProfiler
https://github.com/CSUG/HouseMD
http://wiki.cyclopsgroup.org/jmxterm
https://github.com/jlusdy/TBJMap
1.1.4. 学习Java诊断工具
http://www.eclipse.org/mat/
http://visualvm.java.net/oqlhelp.html
1.1.5. 自己编写各种outofmemory，stackoverflow程序
HeapOutOfMemory
Young OutOfMemory
MethodArea OutOfMemory
ConstantPool OutOfMemory
DirectMemory OutOfMemory
Stack OutOfMemory
Stack OverFlow
1.1.6. 使用工具尝试解决以下问题，并写下总结
当一个Java程序响应很慢时如何查找问题
当一个Java程序频繁FullGC时如何解决问题，如何查看垃圾回收日志
当一个Java应用发生OutOfMemory时该如何解决，年轻代、年老代、永久代解决办法不同，导致原因也不同
1.1.7. 参考资料
http://docs.oracle.com/javase/specs/jvms/se7/html/
http://www.cs.umd.edu/~pugh/java/memoryModel/
http://gee.cs.oswego.edu/dl/jmm/cookbook.html
1.2. Java基础知识
1.2.1. 阅读源代码
java.lang.String
java.lang.Integer
java.lang.Long
java.lang.Enum
java.math.BigDecimal
java.lang.ThreadLocal
java.lang.ClassLoader & java.net.URLClassLoader
java.util.ArrayList & java.util.LinkedList
java.util.HashMap & java.util.LinkedHashMap & java.util.TreeMap
java.util.HashSet & java.util.LinkedHashSet & java.util.TreeSet
1.2.2. 熟悉Java中各种变量类型
1.2.3. 熟悉Java String的使用，熟悉String的各种函数
1.2.4. 熟悉Java中各种关键字
1.2.5. 学会使用List，Map，Stack，Queue，Set
上述数据结构的遍历
上述数据结构的使用场景
Java实现对Array/List排序
java.uti.Arrays.sort()
java.util.Collections.sort()
Java实现对List去重
Java实现对List去重，并且需要保留数据原始的出现顺序
Java实现最近最少使用cache，用LinkedHashMap
1.2.6. Java IO&Java NIO，并学会使用
java.io.*
java.nio.*
nio和reactor设计模式
文件编码，字符集
1.2.7. Java反射与javassist
反射与工厂模式
java.lang.reflect.*
1.2.8. Java序列化
java.io. Serializable
什么是序列化，为什么序列化
序列化与单例模式
google序列化protobuf
1.2.9. 虚引用，弱引用，软引用
java.lang.ref.*
实验这些引用的回收
1.2.10. 熟悉Java系统属性
java.util.Properties
1.2.11. 熟悉Annotation用法
java.lang.annotation.*
1.2.12. JMS
javax.jms.*
1.2.13. JMX
java.lang.management.*
javax.management.*
1.2.14. 泛型和继承，泛型和擦除
1.2.15. 自动拆箱装箱与字节码
1.2.16. 实现Callback
1.2.17. java.lang.Void类使用
1.2.18. Java Agent，premain函数
java.lang.instrument
1.2.19. 单元测试
Junit，http://junit.org/
Jmockit，https://code.google.com/p/jmockit/
djUnit，http://works.dgic.co.jp/djunit/
1.2.20. Java实现通过正则表达式提取一段文本中的电子邮件，并将@替换为#输出
java.lang.util.regex.*
1.2.21. 学习使用常用的Java工具库
commons.lang, commons.*…
guava-libraries
netty
1.2.22. 什么是API&SPI
http://en.wikipedia.org/wiki/Application_programming_interface
http://en.wikipedia.org/wiki/Service_provider_interface
1.2.23. 参考资料
JDK src.zip 源代码
http://openjdk.java.net/
http://commons.apache.org/
https://code.google.com/p/guava-libraries/
http://netty.io/
http://stackoverflow.com/questions/2954372/difference-between-spi-and-api
http://stackoverflow.com/questions/11404230/how-to-implement-the-api-spi-pattern-in-java
1.3. Java并发编程
1.3.1. 阅读源代码，并学会使用
java.lang.Thread
java.lang.Runnable
java.util.concurrent.Callable
java.util.concurrent.locks.ReentrantLock
java.util.concurrent.locks.ReentrantReadWriteLock
java.util.concurrent.atomic.Atomic*
java.util.concurrent.Semaphore
java.util.concurrent.CountDownLatch
java.util.concurrent.CyclicBarrier
java.util.concurrent.ConcurrentHashMap
java.util.concurrent.Executors
1.3.2. 学习使用线程池，自己设计线程池需要注意什么
1.3.3. 锁
什么是锁，锁的种类有哪些，每种锁有什么特点，适用场景是什么
在并发编程中锁的意义是什么
1.3.4. synchronized的作用是什么，synchronized和lock
1.3.5. sleep和wait
1.3.6. wait和notify
1.3.7. 写一个死锁的程序
1.3.8. 什么是守护线程，守护线程和非守护线程的区别以及用法
1.3.9. volatile关键字的理解
C++ volatile关键字和Java volatile关键字
happens-before语义
编译器指令重排和CPU指令重排
http://en.wikipedia.org/wiki/Memory_ordering
http://en.wikipedia.org/wiki/Volatile_variable
http://preshing.com/20130702/the-happens-before-relation/
1.3.10. 以下代码是不是线程安全？为什么？如果为count加上volatile修饰是否能够做到线程安全？你觉得该怎么做是线程安全的？
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">class</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Sample</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">private</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">int</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> count </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">0</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">void</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> increment</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">()</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">count</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">++;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span></code>
1.3.11. 解释一下下面两段代码的差别
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="com" style="color: rgb(147, 161, 161);"><span class="com">// 代码1</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">class</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Sample</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">private</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">int</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> count </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">0</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">synchronized</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">void</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> increment</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">()</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">count</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">++;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="com" style="color: rgb(147, 161, 161);"><span class="com">// 代码2</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">class</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Sample</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">private</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">AtomicInteger</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> count </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">new</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">AtomicInteger</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">0</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">void</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> increment</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">()</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">count</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">getAndIncrement</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">();</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span></code>
1.3.12. 参考资料
http://book.douban.com/subject/10484692/
http://www.intel.com/content/www/us/en/processors/architectures-software-developer-manuals.html
二、 进阶篇
2.1. Java底层知识
2.1.1. 学习了解字节码、class文件格式
http://en.wikipedia.org/wiki/Java_class_file
http://en.wikipedia.org/wiki/Java_bytecode
http://en.wikipedia.org/wiki/Java_bytecode_instruction_listings
http://www.csg.ci.i.u-tokyo.ac.jp/~chiba/javassist/
http://asm.ow2.org/
2.1.2. 写一个程序要求实现javap的功能（手工完成，不借助ASM等工具）
如Java源代码：
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">void</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> main</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">String</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">[]</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> args</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">)</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">int</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> i </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">0</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">i </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">+=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">i </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">*=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">System</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">out</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">println</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">i</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span></code>
编译后读取class文件输出以下代码：
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">void</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> main</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">java</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">lang</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">String</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">[]);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Code</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Stack</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Locals</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Args_size</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">0</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> iconst_0</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> istore_1</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> iinc </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">5</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> iload_1</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">6</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> iconst_1</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">7</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> imul</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">8</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> istore_1</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">9</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> getstatic </span></span><span class="com" style="color: rgb(147, 161, 161);"><span class="com">#2; //Field java/lang/System.out:Ljava/io/PrintStream;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">12</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> iload_1</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">13</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> invokevirtual </span></span><span class="com" style="color: rgb(147, 161, 161);"><span class="com">#3; //Method java/io/PrintStream.println:(I)V</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">16</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">return</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">LineNumberTable</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> line </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">4</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">0</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">line </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">5</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">line </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">6</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">5</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">line </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">7</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">9</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">line </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">8</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">16</span></span></code>
2.1.3. CPU缓存，L1，L2，L3和伪共享
http://duartes.org/gustavo/blog/post/intel-cpu-caches/
http://mechanical-sympathy.blogspot.com/2011/07/false-sharing.html
2.1.4. 什么是尾递归
2.1.5. 熟悉位运算
用位运算实现加、减、乘、除、取余
2.1.6. 参考资料
http://book.douban.com/subject/1138768/
http://book.douban.com/subject/6522893/
http://en.wikipedia.org/wiki/Java_class_file
http://en.wikipedia.org/wiki/Java_bytecode
http://en.wikipedia.org/wiki/Java_bytecode_instruction_listings
2.2. 设计模式
2.2.1. 实现AOP
CGLIB和InvocationHandler的区别
http://cglib.sourceforge.net/
动态代理模式
Javassist实现AOP
http://www.csg.ci.i.u-tokyo.ac.jp/~chiba/javassist/
ASM实现AOP
http://asm.ow2.org/
2.2.2. 使用模板方法设计模式和策略设计模式实现IOC
2.2.3. 不用synchronized和lock，实现线程安全的单例模式
2.2.4. nio和reactor设计模式
2.2.5. 参考资料
http://asm.ow2.org/
http://cglib.sourceforge.net/
http://www.javassist.org/
2.3. 网络编程知识
2.3.1. Java RMI，Socket，HttpClient
2.3.2. 用Java写一个简单的静态文件的HTTP服务器
实现客户端缓存功能，支持返回304
实现可并发下载一个文件
使用线程池处理客户端请求
使用nio处理客户端请求
支持简单的rewrite规则
上述功能在实现的时候需要满足“开闭原则”
2.3.3. 了解nginx和apache服务器的特性并搭建一个对应的服务器
http://nginx.org/
http://httpd.apache.org/
2.3.4. 用Java实现FTP、SMTP协议
2.3.5. 什么是CDN？如果实现？DNS起到什么作用？
搭建一个DNS服务器
搭建一个 Squid 或 Apache Traffic Server 服务器
http://www.squid-cache.org/
http://trafficserver.apache.org/
http://en.wikipedia.org/wiki/Domain_Name_System
2.3.6. 参考资料
http://www.ietf.org/rfc/rfc2616.txt
http://tools.ietf.org/rfc/rfc5321.txt
http://en.wikipedia.org/wiki/Open/closed_principle
2.4. 框架知识
spring，spring mvc，阅读主要源码
ibatis，阅读主要源码
用spring和ibatis搭建java server
2.5. 应用服务器知识
熟悉使用jboss，https://www.jboss.org/overview/
熟悉使用tomcat，http://tomcat.apache.org/
熟悉使用jetty，http://www.eclipse.org/jetty/
三、 高级篇
3.1. 编译原理知识
3.1.1. 用Java实现以下表达式解析并返回结果（语法和Oracle中的select sysdate-1 from dual类似）
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> sysdatesysdate </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">-</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">sysdate </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">-</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">/</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">24</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">sysdate </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">-</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">/(</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">12</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">*</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">)</span></span></code>
3.1.2. 实现对一个List通过DSL筛选
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">QList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun"><</span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Map</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun"><</span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">String</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Object</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">>></span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> mapList </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">new</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">QList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun"><</span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Map</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun"><</span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">String</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">Object</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">>>;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">mapList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">add</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">({</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"name"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"hatter test"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">});</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">mapList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">add</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">({</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"id"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">-</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"name"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"hatter test"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">});</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">mapList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">add</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">({</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"id"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">0</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"name"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"hatter test"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">});</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">mapList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">add</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">({</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"id"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"name"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"test test"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">});</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">mapList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">add</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">({</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"id"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"name"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"hatter test"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">});</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">mapList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">add</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">({</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"id"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">3</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">,</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"name"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"test hatter"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">});</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">mapList</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">query</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"id is not null and id > 0 and name like '%hatter%'"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span></code>
要求返回列表中匹配的对象，即最后两个对象；
3.1.3. 用Java实现以下程序（语法和变量作用域处理都和JavaScript类似）：
代码：
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">var</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> a </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">var</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> b </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">var</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> c </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">function</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">()</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">var</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> a </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">3</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">println</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">a</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">println</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">b</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">};</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
c</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">();</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
println</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">a</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
println</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">b</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span></code>
输出：
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">3</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">1</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="lit" style="color: rgb(174, 129, 255);"><span class="lit">2</span></span></code>
3.1.4. 参考资料
http://en.wikipedia.org/wiki/Abstract_syntax_tree
https://javacc.java.net/
http://www.antlr.org/
3.2. 操作系统知识
Ubuntu
Centos
使用linux，熟悉shell脚本
3.3. 数据存储知识
3.3.1. 关系型数据库
MySQL
如何看执行计划
如何搭建MySQL主备
binlog是什么
Derby，H2，PostgreSQL
SQLite
3.3.2. NoSQL
Cache
Redis
Memcached
Leveldb
Bigtable
HBase
Cassandra
Mongodb
图数据库
neo4j
3.3.3. 参考资料
http://db-engines.com/en/ranking
http://redis.io/
https://code.google.com/p/leveldb/
http://hbase.apache.org/
http://cassandra.apache.org/
http://www.mongodb.org/
http://www.neo4j.org/
3.4. 大数据知识
3.4.1. Zookeeper，在linux上部署zk
3.4.2. Solr，Lucene，ElasticSearch
在linux上部署solr，solrcloud，，新增、删除、查询索引
3.4.3. Storm，流式计算，了解Spark，S4
在linux上部署storm，用zookeeper做协调，运行storm hello world，local和remote模式运行调试storm topology。
3.4.4. Hadoop，离线计算
Hdfs：部署NameNode，SecondaryNameNode，DataNode，上传文件、打开文件、更改文件、删除文件
MapReduce：部署JobTracker，TaskTracker，编写mr job
Hive：部署hive，书写hive sql，得到结果
Presto：类hive，不过比hive快，非常值得学习
3.4.5. 分布式日志收集flume，kafka，logstash
3.4.6. 数据挖掘，mahout
3.4.7. 参考资料
http://zookeeper.apache.org/
https://lucene.apache.org/solr/
https://github.com/nathanmarz/storm/wiki
http://hadoop.apache.org/
http://prestodb.io/
http://flume.apache.org/，http://logstash.net/，http://kafka.apache.org/
http://mahout.apache.org/
3.5. 网络安全知识
3.5.1. 什么是DES、AES
3.5.2. 什么是RSA、DSA
3.5.3. 什么是MD5，SHA1
3.5.4. 什么是SSL、TLS，为什么HTTPS相对比较安全
3.5.5. 什么是中间人攻击、如果避免中间人攻击
3.5.6. 什么是DOS、DDOS、CC攻击
3.5.7. 什么是CSRF攻击
3.5.8. 什么是CSS攻击
3.5.9. 什么是SQL注入攻击
3.5.10. 什么是Hash碰撞拒绝服务攻击
3.5.11. 了解并学习下面几种增强安全的技术
http://www.openauthentication.org/
HOTP http://www.ietf.org/rfc/rfc4226.txt
TOTP http://tools.ietf.org/rfc/rfc6238.txt
OCRA http://tools.ietf.org/rfc/rfc6287.txt
http://en.wikipedia.org/wiki/Salt_(cryptography)
3.5.12. 用openssl签一个证书部署到apache或nginx
3.5.13. 参考资料
http://en.wikipedia.org/wiki/Cryptographic_hash_function
http://en.wikipedia.org/wiki/Block_cipher
http://en.wikipedia.org/wiki/Public-key_cryptography
http://en.wikipedia.org/wiki/Transport_Layer_Security
http://www.openssl.org/
https://code.google.com/p/google-authenticator/
四、 扩展篇
4.1. 相关知识
4.1.1. 云计算，分布式，高可用，可扩展
4.1.2. 虚拟化
https://linuxcontainers.org/
http://www.linux-kvm.org/page/Main_Page
http://www.xenproject.org/
https://www.docker.io/
4.1.3. 监控
http://www.nagios.org/
http://ganglia.info/
4.1.4. 负载均衡
http://www.linuxvirtualserver.org/
4.1.5. 学习使用git
https://github.com/
https://git.oschina.net/
4.1.6. 学习使用maven
http://maven.apache.org/
4.1.7. 学习使用gradle
http://www.gradle.org/
4.1.8. 学习一个小语种语言
Groovy
Scala
LISP, Common LISP, Schema, Clojure
R
Julia
Lua
Ruby
4.1.9. 尝试了解编码的本质
了解以下概念
ASCII, ISO-8859-1
GB2312, GBK, GB18030
Unicode, UTF-8
不使用 String.getBytes() 等其他工具类/函数完成下面功能
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">void</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> main</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">String</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">[]</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> args</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">)</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">throws</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">IOException</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">String</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> str </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"Hello, 我们是中国人。"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">byte</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">[]</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> utf8Bytes </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> toUTF8Bytes</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">str</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">FileOutputStream</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> fos </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">=</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">new</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">FileOutputStream</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="str" style="color: rgb(230, 219, 116);"><span class="str">"f.txt"</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">fos</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">write</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">utf8Bytes</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">);</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">fos</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">.</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">close</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">();</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">public</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">static</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">byte</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">[]</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> toUTF8Bytes</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">(</span></span><span class="typ" style="color: rgb(166, 226, 46);"><span class="typ">String</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> str</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">)</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">{</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"></span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">return</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="kwd" style="color: rgb(249, 38, 89);"><span class="kwd">null</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">;</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln"> </span></span><span class="com" style="color: rgb(147, 161, 161);"><span class="com">// TODO</span></span><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">
</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">}</span></span></code>
想一下上面的程序能不能写一个转GBK的？
写个程序自动判断一个文件是哪种编码
4.1.10. 尝试了解时间的本质
时区 & 冬令时、夏令时
http://en.wikipedia.org/wiki/Time_zone
ftp://ftp.iana.org/tz/data/asia
http://zh.wikipedia.org/wiki/%E4%B8%AD%E5%9C%8B%E6%99%82%E5%8D%80
闰年
http://en.wikipedia.org/wiki/Leap_year
闰秒
ftp://ftp.iana.org/tz/data/leapseconds
System.currentTimeMillis() 返回的时间是什么
4.1.11. 参考资料
http://git-scm.com/
http://en.wikipedia.org/wiki/UTF-8
http://www.iana.org/time-zones
4.2. 扩展学习
4.2.1. JavaScript知识
4.2.1.1. 什么是prototype
修改代码，使程序输出“1 3 5”：
http://jsfiddle.net/Ts7Fk/
4.2.1.2. 什么是闭包
看一下这段代码，并解释一下为什么按Button1时没有alert出“This is button: 1”，如何修改：
http://jsfiddle.net/FDPj3/1/
4.2.1.3. 了解并学习一个JS框架
jQuery
ExtJS
ArgularJS
4.2.1.4. 写一个Greasemonkey插件
<code style="font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; padding: 0px; color: inherit; background-color: transparent;"><span class="pln" style="color: rgb(102, 217, 239);"><span class="pln">http</span></span><span class="pun" style="color: rgb(248, 248, 242);"><span class="pun">:</span></span><span class="com" style="color: rgb(147, 161, 161);"><span class="com">//en.wikipedia.org/wiki/Greasemonkey</span></span></code>
4.2.1.5. 学习node.js
http://nodejs.org/
4.2.2. 学习html5
ArgularJS，https://docs.angularjs.org/api
4.2.3. 参考资料
http://www.ecmascript.org/
http://jsfiddle.net/
http://jsbin.com/
http://runjs.cn/
http://userscripts.org/
五、 推荐书籍
《深入Java虚拟机》
《深入理解Java虚拟机》
《Effective Java》
《七周七语言》
《七周七数据》
《Hadoop技术内幕》
《Hbase In Action》
《Mahout In Action》
《这就是搜索引擎》
《Solr In Action》
《深入分析Java Web技术内幕》
《大型网站技术架构》
《高性能MySQL》
《算法导论》
《计算机程序设计艺术》
《代码大全》
《JavaScript权威指南》
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