SpingBoot学习总结

本文主要是介绍SpingBoot学习总结，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.项目初始配置

1.1 引入依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.1.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.lxy</groupId><artifactId>springbootdemo</artifactId><version>0.0.1-SNAPSHOT</version><name>springbootdemo</name><packaging>jar</packaging><description>Demo project for Spring Boot</description><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--SpingBoot集成junit测试的起步依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!--mybatis起步依赖--><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.1.1</version></dependency><!-- MySQL连接驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><!-- 配置使用redis启动器 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

1.2  添加数据库连接信息

在application.properties中添加数据量的连接信息

spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/springboottest?serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=root

1.3 创建数据库表

CREATE TABLE `user` (`id` int(11) NOT NULL AUTO_INCREMENT,`username` varchar(50) DEFAULT NULL,`password` varchar(50) DEFAULT NULL,`name` varchar(50) DEFAULT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8;

1.4  创建实体Bean

public class User {private Long id;private String username;private String password;private String name;.................
}

1.5 编写Mapper

@Mapper
public interface UserMapper {public List<User> queryUserList();
}

1.6  配置Mapper映射文件

在src\main\resources\mapper路径下加入UserMapper.xml配置文件"

<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.lxy.mapper.UserMapper"><select id="queryUserList" resultType="com.lxy.domain.User">select * from user</select>
</mapper>

1.7  在application.properties中添加mybatis的信息

mybatis.type-aliases-package=com.lxy.domain
mybatis.mapper-locations=classpath:mapper/*Mapper.xml

1.8 编写测试Controller

@Controller
public class MybatisController {@Autowiredprivate UserMapper userMapper;@RequestMapping("/query")@ResponseBodypublic List<User> queryUserList(){List<User> users = userMapper.queryUserList();return users;}}

1.9 测试

二. SpringBoot整合Spring Data JPA

2.1  添加Spring Data JPA的起步依赖

        <!-- springBoot JPA的起步依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency>

2.2 添加数据库驱动依赖（添加请忽略）

        <!-- MySQL连接驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency>

2.3 在application.properties中配置数据库和jpa的相关属性

#JPA Configuration:
spring.jpa.database=MySQL 
spring.jpa.show-sql=true 
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy

2.4 修改实体配置实体

@Entity
public class User {@Id@GeneratedValue(strategy = GenerationType.IDENTITY)private Long id;private String username;private String password;private String name;.........................
}

2.5  编写UserRepository

public interface UserRepository extends JpaRepository<User,Long> {public List<User> findAll();
}

2.6 编写测试类

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootdemoApplication.class)
public class JpaTest {@Autowiredprivate UserRepository userRepository;@Testpublic void test() {List<User> users = userRepository.findAll();System.out.println(users);}
}

2.7 测试

三. SpringBoot整合Redis

3.1 添加redis的起步依赖

        <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency>

3.2 配置redis的连接信息

#Redis
spring.redis.host=127.0.0.1
spring.redis.port=6379

3.3 ​​​​​​ 注入RedisTemplate测试redis操作

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootdemoApplication.class)
public class JpaTest {@Autowiredprivate UserRepository userRepository;@Autowiredprivate RedisTemplate<String, String> redisTemplate;@Testpublic void test() {String userListData = redisTemplate.boundValueOps("users.findAll").get();if(StringUtils.isEmpty(userListData)){List<User> users = userRepository.findAll();System.out.println("users:"+users);if(!CollectionUtils.isEmpty(users)){//可以转jsonredisTemplate.boundValueOps("users.findAll").set(users.toString());}}String userListData2 = redisTemplate.boundValueOps("users.findAll").get();System.out.println("userListData2############:"+userListData2);}
}

四. SpringBoot整合数据源

 

 

五.使用小技巧

5.1 打包

 

当你的 Spring Boot 准备提测或者上线，都需要打成 jar 包或者 war 包运行，war 包方式这里不说直接丢到 Server 里面运行即可，这里介绍直接运行 jar 包的方式。

$ java -jar javastack-0.0.1-SNAPSHOT.jar

这种方式也支持开启远程调试，如：

$ java -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=8000,suspend=n -jar javastack-0.0.1-SNAPSHOT.jar

 

5.2 用插件运行

可以在 IDE 或者命令行中使用 Maven 和 Gradle 插件来运行 Spring Boot 应用。

1）Maven Plugin

$ mvn spring-boot:run

 

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