Spring Boot 使用@RestControllerAdvice实现捕获全局异常统一处理

刺骨的言语ヽ痛彻心扉 2022-10-09 03:08 214阅读 0赞

### 1 @RestControllerAdvice ###

RestControllerAdvice会自动帮助catch,并匹配相应的ExceptionHandler,然后重新封装异常信息，返回值，统一格式返回给前端。

### 2 GlobalExceptionHandler ###

捕获全局异常统一处理器。

package com.handler;
    
    import org.springframework.web.bind.annotation.*;
    
    import javax.servlet.http.HttpServletRequest;
    import java.util.HashMap;
    import java.util.Map;
    
    /**
     * 捕获全局异常统一处理器
     */
    @RestControllerAdvice
    public class GlobalExceptionHandler {
        @ExceptionHandler({Exception.class})
        public Map<String,Object> exceptionHandler(HttpServletRequest request, Exception exception) {
            Map<String,Object> response = new HashMap<>();
            response.put("code", 500);
            response.put("data", (Object)null);
            response.put("msg", exception.getMessage());
            return response;
        }
    }

### 3 ExceptionController ###

调试代码。

package com.controller;
    
    import org.springframework.web.bind.annotation.*;
    
    @RestController
    @RequestMapping("/exception")
    public class ExceptionController {
        @GetMapping("/test")
        public String test(@RequestParam int num) throws Exception {
            if (num < 0) {
                throw new Exception("参数错误");
            }
            return "查询成功";
        }
    }

###  4 调试结果 ###

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTc0NjM4_size_16_color_FFFFFF_t_70]: /images/20221005/8d265b5fc4904efca94713685cf63336.png