SpringBoot配置全局异常学习笔记

1.在未配置全局异常之前：访问一个出现异常的接口

 @GetMapping("/testJson")
 Object testJson(){
       int a = 1 /0 ;
       return new User("wjl12333",11,"13563986965",new Date(),"10010");
 }

浏览器中访问/testJson返回接口如图所示：

2.创建RestExceptonHandler

@RestControllerAdvice
public class RestExceptonHandler {

    @ExceptionHandler(Exception.class)
    Object handlerRestException(Exception e, HttpServletRequest request){
        Map map = new HashMap<>();
        map.put("code",100);
        map.put("msg",e.getMessage());
        map.put("url",request.getRequestURL());
        return  map;
    }

}

再次访问/testJson,返回结果如图所示：

3.配置自定义全局异常

创建自定义异常类

/**
 * @author LONG
 * 自定义全局异常
 */
public class MyException extends RuntimeException {
    private String code;

    private String msg;

    public MyException(String code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

在RestExceptonHandler中添加对自定义异常的处理

@ExceptionHandler(MyException.class)
Object handlerMyException(MyException e, HttpServletRequest request){
   //返回跳转的错误提示界面
     /* ModelAndView mv = new ModelAndView();
        mv.addObject("error.html");
        return mv;*/
  //返回json数据由前端去判断加载什么页面
   logger.error("url {}, msg {}",request.getRequestURL(),e.getMsg());
   Map map = new HashMap<>();
   map.put("code",e.getCode());
   map.put("msg",e.getMsg());
   map.put("url",request.getRequestURL());
   return  map;
}

对自定义异常进行测试

 @GetMapping("/testMyException")
 Object testMyException(){
        throw new MyException("202","我自己定义的异常");
 }

返回结果