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4.6.整合事务

其实，我们引入jdbc或者web的启动器，就已经引入事务相关的依赖及默认配置了

至于事务，SpringBoot中通过注解来控制。就是我们熟知的@Transactional

@Servicepublic class UserService {    @Autowired    private UserMapper userMapper;    public User queryById(Long id){        return this.userMapper.selectByPrimaryKey(id);    }    @Transactional    public void deleteById(Long id){        this.userMapper.deleteByPrimaryKey(id);    }}

4.7.启动测试

在UserController中添加测试方法，内容：

@RestController@RequestMapping("user")public class UserController {    @Autowired    private UserService userService;    @GetMapping("{id}")    public User queryUserById(@PathVariable("id")Long id){        return this.userService.queryById(id);    }    @GetMapping("hello")    public String test(){        return "hello ssm";    }}

完整的pom.xml：

   
       
    
     4.0.0
        
    
     cn.learn.user
        
    
     learn-user
        
    
     1.0.0-SNAPSHOT
        
            
     
      org.springframework.boot
             
     
      spring-boot-starter-parent
             
     
      2.0.6.RELEASE
         
        
            
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-web
              
             
             
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-jdbc
              
             
             
                 
      
       mysql
                  
      
       mysql-connector-java
              
             
             
                 
      
       org.mybatis.spring.boot
                  
      
       mybatis-spring-boot-starter
                  
      
       1.3.2
              
             
             
                 
      
       tk.mybatis
                  
      
       mapper-spring-boot-starter
                  
      
       2.0.2
              
         
        
   

完整的application.properties：

# 映射端口server.port=8888# 设置org.springframework包的日志级别为debug#logging.level.org.springframework=debug# 连接四大参数spring.datasource.url=jdbc:mysql://localhost:3306/mybatisdbspring.datasource.username=rootspring.datasource.password=123456# 可省略，SpringBoot自动推断spring.datasource.driverClassName=com.mysql.jdbc.Driverspring.datasource.hikari.idle-timeout=60000spring.datasource.hikari.maximum-pool-size=30spring.datasource.hikari.minimum-idle=10# mybatis 别名扫描mybatis.type-aliases-package=cn.learn.user.pojo# mapper.xml文件位置,如果没有映射文件，请注释掉#mybatis.mapper-locations=classpath:mybatis/mappers/**/*.xml

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