SpringBoot(6) SpringBoot配置全域性異常
摘要：
1、全域性異常
@ControllerAdvice 如果是返回json資料 則用 RestControllerAdvice,就可以不加 @ResponseBody
//捕獲全域性異常,處理所有不可知的異常
@ExceptionHandler(value=Excepti...
1、全域性異常
@ControllerAdvice 如果是返回json資料 則用 RestControllerAdvice,就可以不加 @ResponseBody
//捕獲全域性異常,處理所有不可知的異常
@ExceptionHandler(value=Exception.class)
1 @RestControllerAdvice
2 public class CustomExtHandler {
3
4private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class);
5
6
7//捕獲全域性異常,處理所有不可知的異常
8@ExceptionHandler(value=Exception.class)
9Object handleException(Exception e,HttpServletRequest request){
10LOG.error("url {}, msg {}",request.getRequestURL(), e.getMessage());
11Map<String, Object> map = new HashMap<>();
12map.put("code", 100);
13map.put("msg", e.getMessage());
14map.put("url", request.getRequestURL());
15return map;
16}
17
18 }
2、自定義異常型別
自定義異常型別MyException
1 /*
2* 功能描述: 建立自定義異常類 -- 繼承執行異常最高類
3*
4* */
5
6 public class MyException extends RuntimeException{
7
8public MyException(String code, String msg){
9this.code = code;
10this.msg = msg;
11}
12
13private String code;
14private String msg;
15
16public String getCode() {
17return code;
18}
19public void setCode(String code) {
20this.code = code;
21}
22
23public String getMsg() {
24return msg;
25}
26
27public void setMsg(String msg) {
28this.msg = msg;
29}
30
31 }
修改CustomExtHandler
1 @RestControllerAdvice
2 public class CustomExtHandler {
3
4private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class);
5
6
7//捕獲全域性異常,處理所有不可知的異常
8@ExceptionHandler(value=Exception.class)
9Object handleException(Exception e,HttpServletRequest request){
10LOG.error("url {}, msg {}",request.getRequestURL(), e.getMessage());
11Map<String, Object> map = new HashMap<>();
12map.put("code", 100);
13map.put("msg", e.getMessage());
14map.put("url", request.getRequestURL());
15return map;
16}
17
18/**
19* 功能描述: 處理自定義異常類
20* @return
21*
22*/
23@ExceptionHandler(value = MyException.class)
24Object handleMyException(MyException e, HttpServletRequest request){
25//進行頁面跳轉
26 //ModelAndView modelAndView = new ModelAndView();
27 //modelAndView.setViewName("error.html");
28 //modelAndView.addObject("msg", e.getMessage());
29 //return modelAndView;
30
31//f返回json資料
32Map<String, Object> map = new HashMap<>();
33map.put("code", e.getCode());
34map.put("msg", e.getMessage());
35map.put("url", request.getRequestURL());
36return map;
37}
38 }
模擬一個異常實現頁面跳轉
1 /** 2* 功能描述: 模擬自定義異常 3* @return 4*/ 5 @RequestMapping(value = "/api/v1/myext") 6 public Object myext() { 7throw new MyException("500", "my ext異常"); 8 } 9
最後梳理順序：
首先，建立自定義異常類 MyException，繼承於RuntimeException。如果出異常，在@RestControllerAdvice註釋下的CustomExtHandler裡面捕獲，根據異常種類進行處理。
異常處理的官網地址： https://docs.spring.io/spring-boot/docs/2.1.0.BUILD-SNAPSHOT/reference/htmlsingle/#boot-features-error-handling