本文主要是介绍二、SpringBoot的配置--bilibili雷丰阳笔记，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！
1、配置文件
application.properties
application.yml
2、yml
字面量： 数字 字符串 布尔 中间有空格 不加双引号和单引号，双引号（不会转义特殊字符）和单引号（会转义）
k: v
对象：map
friends:lastName: zhangsanage: 20
行内写法
friends: {lastName: zhangsan,age: lisi}
数组：list set
用短横线-数组元素
pets:- cat- dog- pig
行内写法
pets: [cat,dog,pig]
项目
从配置文件获取值
application.yml
person:lastName: zhangsanage: 18boss: falsebirth: 2017/12/12maps: {k1: v1,k2: v2}lists:- lisi- zhangliudog:name: 小狗age: 12
javaBean
package com.it.springboot01helloworld.bean;import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;import java.util.Date;
import java.util.List;
import java.util.Map;/*** 将配置中每个文件的值，映射到这个组件中*/
@Component
@ConfigurationProperties(prefix = "person")
public class Person {private String lastName;private Integer age;private boolean boss;private Date birth;private Map<String, Object> maps;private List<Object> lists;private Dog dog;@Overridepublic String toString() {return "Person{" +"lastName='" + lastName + '\'' +", age=" + age +", boss=" + boss +", birth=" + birth +", maps=" + maps +", lists=" + lists +", dog=" + dog +'}';}public String getLastName() {return lastName;}public void setLastName(String lastName) {this.lastName = lastName;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public boolean isBoss() {return boss;}public void setBoss(boolean boss) {this.boss = boss;}public Date getBirth() {return birth;}public void setBirth(Date birth) {this.birth = birth;}public Map<String, Object> getMaps() {return maps;}public void setMaps(Map<String, Object> maps) {this.maps = maps;}public List<Object> getLists() {return lists;}public void setLists(List<Object> lists) {this.lists = lists;}public Dog getDog() {return dog;}public void setDog(Dog dog) {this.dog = dog;}
}package com.it.springboot01helloworld.bean;public class Dog {private String name;private Integer age;@Overridepublic String toString() {return "Dog{" +"name='" + name + '\'' +", age=" + age +'}';}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}
}
pom 导入
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><optional>true</optional></dependency>
测试
package com.it.springboot01helloworld;import com.it.springboot01helloworld.bean.Person;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;/*** 在编码的时候进行容器注入*/
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBootApplicationTest {@AutowiredPerson person;@Testpublic void contextLoads(){System.out.println(person);}
}
application.properties文件
person.last-name=张三
person.age=12
person.birth=2017/12/15
person.boss=false
person.maps.k1=v1
person.maps.k2=v2
person.lists=a,b,c
person.dog.name=dog
person.dog.age=10
1.如果只需从配置文件获取一个值 @Value("${person.last-name}")
2.如果 javabean和配置文件进行映射 @ConfigurationProperties
3.@PropertySource和@ImportResource
@Component
@ConfigurationProperties(prefix = "person")
//@Validated
@PropertySource(value={"classpath:person.properties"})
public class Person {
// @Emailprivate String lastName;private Integer age;private boolean boss;private Date birth;private Map<String, Object> maps;private List<Object> lists;private Dog dog;
}
@ImportResource 导入spring配置文件
@SpringBootApplication
@ImportResource(locations = {"classpath:beans.xml"})
public class SpringBoot01HelloworldApplication {public static void main(String[] args) {SpringApplication.run(SpringBoot01HelloworldApplication.class, args);}}/*** 在编码的时候进行容器注入*/
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBootApplicationTest {@AutowiredPerson person;@AutowiredApplicationContext ioc;@Testpublic void testHelloService(){boolean b = ioc.containsBean("helloService");System.out.println(b);}@Testpublic void contextLoads(){System.out.println(person);}
}
beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"><bean id="helloService" class="com.it.springboot01helloworld.service.HelloService"></bean>
</beans>
4.Springboot推荐给容器添加组件
@Configuration
public class MyAppConfig {@Beanpublic HelloService helloService02(){System.out.println("配置类bean给容器添加组件了。。。");return new HelloService();}}
5.配置文件占位符
1.随机数
${random.value}
2.占位符获取之前获得的值，如果没有可以用:获得默认值
person.last-name=李四${random.uuid}
person.age=12
person.birth=2017/12/15
person.boss=false
person.maps.k1=v1
person.maps.k2=v2
person.lists=a,b,c
person.dog.name=${person.last-name}${person.hello:hello}dog
person.dog.age=10
6.Profile
application-dev.properties
application-prod.properties
spring.profiles.active=dev
yml
server:port: 8090
spring:profiles:active: dev
---
server:port: 8083
spring:profiles: dev
---server:port: 8022
spring:profiles: prod
在启动application
Program arguments的时候添加
--spring.profiles.active=prod
VM options
-Dspring.profiles.active=prod
或者
java -jar filename.jar --spring.profiles.active=prod
7.添加项目背景
server.context-path=/boot
http://localhost:8022/boot/hello
8.还可以通过来改变默认文件的位置
–spring.config.location
项目打包以后，可以通过命令行参数的形式，启动项目来指定
java -jar filename.jar --server.port=8087 --server.context-path=/abc
配置项太多，直接将配置文件放到jar包的旁边
@EnableAutoConfiguration
解释自动配置原理 一个例子
@Configuration
@EnableConfigurationProperties({HttpEncodingProperties.class})
@ConditionalOnWebApplication
@ConditionalOnClass({CharacterEncodingFilter.class})
@ConditionalOnProperty(prefix = "spring.http.encoding",value = {"enabled"},matchIfMissing = true
)
public class HttpEncodingAutoConfiguration {
所有配置文件的属性都在 xxxProperties中封装的
@ConfigurationProperties(prefix = "spring.http.encoding")
public class HttpEncodingProperties {public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
根据当前的不同条件判断，决定这个配置类是否生效
springboot会加重大量自动配置类
自动配置类配置了哪些组件
会从properties中获取属性
xxxAutoConfiguration
xxxProperties
idea快捷键 查找某个类
ctrl+shift+n *AutoConfiguration
条件判断类
@ConditionalOnClass(CharacterEncodingFilter.class)
自动配置类在一定条件下才会生效
配置文件 开启debug模式
debug=true
Positive matches:
-----------------DispatcherServletAutoConfiguration matched:- @ConditionalOnClass found required class 'org.springframework.web.servlet.DispatcherServlet'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)- @ConditionalOnWebApplication (required) found StandardServletEnvironment (OnWebApplicationCondition)DispatcherServletAutoConfiguration.DispatcherServletConfiguration matched:- @ConditionalOnClass found required class 'javax.servlet.ServletRegistration'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)- Default DispatcherServlet did not find dispatcher servlet beans (DispatcherServletAutoConfiguration.DefaultDispatcherServletCondition)Negative matches:
-----------------ActiveMQAutoConfiguration:Did not match:- @ConditionalOnClass did not find required classes 'javax.jms.ConnectionFactory', 'org.apache.activemq.ActiveMQConnectionFactory' (OnClassCondition)AopAutoConfiguration:Did not match:- @ConditionalOnClass did not find required classes 'org.aspectj.lang.annotation.Aspect', 'org.aspectj.lang.reflect.Advice' (OnClassCondition)
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