spring boot自定义异常：

legs+

控制器

1. @RestController
   
2. public class TestController {
   
3.     @RequestMapping("/BusinessException")
   
4.     public String testResponseStatusExceptionResolver(@RequestParam("i") int i){
   
5.         if (i==0){
   
6.             throw new BusinessException(600,"自定义业务错误");
   
7.         }
   
8.               return "success";
   
9.     }
   
10. 
    
11. }
    

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实体类

1. public class BusinessException extends RuntimeException{
   
2.     //自定义错误码
   
3.     private Integer code;
   
4.     //自定义构造器，必须输入错误码及内容
   
5.     public BusinessException(int code,String msg) {
   
6.         super(msg);
   
7.         this.code = code;
   
8.     }
   
9. 
   
10.     public Integer getCode() {
    
11.         return code;
    
12.     }
    
13. 
    
14.     public void setCode(Integer code) {
    
15.         this.code = code;
    
16.     }
    
17. }
    

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自定义业务处理业务异常类

1. @ControllerAdvice
   
2. public class CustomerBusinessExceptionHandler {
   
3.     @ResponseBody
   
4.     @ExceptionHandler(BusinessException.class)
   
5.     public Map<String, Object> businessExceptionHandler(BusinessException e) {
   
6.         Map<String, Object> map = new HashMap<String, Object>();
   
7.         map.put("code", e.getCode());
   
8.         map.put("message", e.getMessage());
   
9.         //发生异常进行日志记录，此处省略
   
10.         return map;
    
11.     }
    
12. }

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