SpringBoot的全局异常拦截操作

@ControllerAdvice

@ControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 拦截运行异常出现的错误~~~
     */
    @ExceptionHandler(RuntimeException.class)
    @ResponseBody
    public Map<Object, Object> exceptionHandler() {
        Map<Object, Object> map = new HashMap<>();
        map.put("error", "500");
        map.put("msg", "系统出现错误~");
        return map;
    }
}

  @ExceptionHandler(RuntimeException.class)

@SpringBootApplication

//@EnableAutoConfiguration   启动依赖jar包中的 类 比如 SpringMVC、Spring

//@ComponentScan("com.api.controller")

Mybatis 的配置信息：

 application.yml

spring:
  datasource:
      url: jdbc:mysql://localhost:3306/test
      username: root
      password: 123456
      driver-class-name: com.mysql.jdbc.Driver

@SpringBootApplication
@MapperScan("com.mapper")
public class SpringMybatis {
    public static void main(String[] args) {
        SpringApplication.run(SpringMybatis.class);
    }
}

public interface UserMapper {
    // xml 注解
    @Select("SELECT * FROM USERS WHERE NAME = #{name}")
    UserEntity findByName(@Param("name") String name);

    @Insert("INSERT INTO USERS(NAME, AGE) VALUES(#{name}, #{age})")
    int insert(@Param("name") String name, @Param("age") Integer age);

}