Spring Boot概述（二）

1.SpringBoot整合Junit

• 1.搭建SpringBoot工程

• 2.引入starter-test起步依赖

  <dependency>
      <groupId>org.springframework.bootgroupId>
      <artifactId>spring-boot-starter-testartifactId>
      <scope>testscope>
  dependency>
  

• 3.编写测试类

  @Service
  public class UserService {
      public void add(){
          System.out.println("add...");
      }
  }
  

• 4. 添加测试相关注解 @SpringBootTest
• 5. 编写测试方法

  @SpringBootTest(classes = SpringbootTestApplication.class)
  //这里加不加classes取决于当前测试类包所在的位置
  //在引导类所在包的子包或同级则不需要加(会自动找引导类)，否则要加
  class SpringbootRedisApplicationTests {
  
      @Autowired
      UserService userService;
      @Test
      void contextLoads() {
          userService.add();
      }
  }
  

2.SpringBoot整合Redis

• 1.搭建SpringBoot工程

• 2.引入redis起步依赖

  <dependency>
      <groupId>org.springframework.bootgroupId>
      <artifactId>spring-boot-starter-data-redisartifactId>
  dependency>
  

• 3. 配置redis相关属性

  spring:
    redis:
      host: 127.0.0.1 #redis的主机ip
      port: 6379
  

• 4. 注入RedisTemplate模板
• 5. 编写测试方法，测试（记得打开本机的redis）

  @SpringBootTest
  class SpringbootRedisApplicationTests {
  
      @Autowired
      private RedisTemplate redisTemplate;
  
      @Test
      public void testSet(){
          //存数剧
          redisTemplate.boundValueOps("name").set("zhangsan");
      }
      @Test 
      void testGet(){
          //获取数据
          Object name = redisTemplate.boundValueOps("name").get();
          System.out.println(name);
      }
  }
  
  

3.SpringBoot整洁MyBatis

• 1.搭建SpringBoot工程

• 2.引入mybatis起步依赖，添加mysql驱动

  <dependency>
      <groupId>org.mybatis.spring.bootgroupId>
      <artifactId>mybatis-spring-boot-starterartifactId>
      <version>2.2.0version>
  dependency>
  
  <dependency>
      <groupId>mysqlgroupId>
      <artifactId>mysql-connector-javaartifactId>
      <scope>runtimescope>
  dependency>
  
  

• 3. 编写DataSource和MyBatis相关配置

  • DataSource配置信息：

    spring:
      datasource:
        url: jdbc:mysql:///mzz
        username: root
        password: root
        driver-class-name: com.mysql.jdbc.Driver
    

  • 用注解开发可以不用写MyBatis的配置

  • xml开发MyBatis相关配置：

    mybatis:
      mapper-locations: classpath:mapper/*Mapper.xml #mapper映射文件路径
      type-aliases-package: com.itheima.springbootmybatis.domain #配置别名
    #config-location: 指定mybatis的核心配置文件
    
    

• 4.定义表和实体类

  USE `mzz`;
  
  DROP TABLE IF EXISTS `t_user`;
  
  CREATE TABLE `t_user` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `username` varchar(32) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
    `password` varchar(32) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
    PRIMARY KEY (`id`)
  ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
  
  insert  into `t_user`(`id`,`username`,`password`) values (1,'zhangsan','123'),(2,'lisi','234');
  
  

  

  @Data
  @ToString
  @AllArgsConstructor
  @NoArgsConstructor
  public class User {
      private Integer id;
      private String username;
      private String password;
  }
  
  

• 5. 编写dao和mapper文件/纯注解开发 、
     xml开发：

  @Mapper
  @Repository
  public interface UserXmlMapper {
  
      public List<User> findAll();
  }
  
  

  
  DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
  <mapper namespace="com.itheima.springbootmybatis.mapper.UserXmlMapper">
      <select id="findAll" resultType="user">
          select * from t_user
      select>
  mapper>
  
  

  纯注解开发：

  
  @Mapper
  @Repository//这里可加可不加，mybatis提供@Mapper可以代替
  public interface UserMapper {
      @Select("select * from t_user")
      public List<User> findAll();
  }
  

• 6.测试

@SpringBootTest
class SpringbootMybatisApplicationTests {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private UserXmlMapper userXmlMapper;

    @Test
    void testFindAll() {
        List<User> res = userMapper.findAll();
        for (User user : res) {
            System.out.println(user);
        }
    }

    @Test
    void testFindAll1() {
        List<User> res = userXmlMapper.findAll();
        for (User user : res) {
            System.out.println(user);
        }
    }
}

参考视频：
https://www.bilibili.com/video/BV1Lq4y1J77x?spm_id_from=333.999.0.0

参考链接：
https://blog.csdn.net/qq_45966440/article/details/120450596?spm=1001.2014.3001.5502