SpringBoot(6) SpringBoot配置全局异常
@ControllerAdvice 如果是返回json数据 则用 RestControllerAdvice,就可以不加 @ResponseBody
//捕获全局异常,处理所有不可知的异常
@ExceptionHandler(value=Exception.class)
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1 @RestControllerAdvice
2 public class CustomExtHandler {
3
4 private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class);
5
6
7 //捕获全局异常,处理所有不可知的异常
8 @ExceptionHandler(value=Exception.class)
9 Object handleException(Exception e,HttpServletRequest request){
10 LOG.error("url {}, msg {}",request.getRequestURL(), e.getMessage());
11 Map map = new HashMap<>();
12 map.put("code", 100);
13 map.put("msg", e.getMessage());
14 map.put("url", request.getRequestURL());
15 return map;
16 }
17
18 }
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2、自定义异常类型
自定义异常类型MyException
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1 /*
2 * 功能描述: 建立自定义异常类 -- 继承运行异常最高类
3 *
4 * */
5
6 public class MyException extends RuntimeException{
7
8 public MyException(String code, String msg){
9 this.code = code;
10 this.msg = msg;
11 }
12
13 private String code;
14 private String msg;
15
16 public String getCode() {
17 return code;
18 }
19 public void setCode(String code) {
20 this.code = code;
21 }
22
23 public String getMsg() {
24 return msg;
25 }
26
27 public void setMsg(String msg) {
28 this.msg = msg;
29 }
30
31 }
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修改CustomExtHandler
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1 @RestControllerAdvice
2 public class CustomExtHandler {
3
4 private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class);
5
6
7 //捕获全局异常,处理所有不可知的异常
8 @ExceptionHandler(value=Exception.class)
9 Object handleException(Exception e,HttpServletRequest request){
10 LOG.error("url {}, msg {}",request.getRequestURL(), e.getMessage());
11 Map map = new HashMap<>();
12 map.put("code", 100);
13 map.put("msg", e.getMessage());
14 map.put("url", request.getRequestURL());
15 return map;
16 }
17
18 /**
19 * 功能描述: 处理自定义异常类
20 * @return
21 *
22 */
23 @ExceptionHandler(value = MyException.class)
24 Object handleMyException(MyException e, HttpServletRequest request){
25 //进行页面跳转
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数据
32 Map map = new HashMap<>();
33 map.put("code", e.getCode());
34 map.put("msg", e.getMessage());
35 map.put("url", request.getRequestURL());
36 return map;
37 }
38 }
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模拟一个异常实现页面跳转
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1 /**
2 * 功能描述: 模拟自定义异常
3 * @return
4 */
5 @RequestMapping(value = "/api/v1/myext")
6 public Object myext() {
7 throw new MyException("500", "my ext异常");
8 }
9
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最后梳理顺序：
首先，建立自定义异常类 MyException，继承于RuntimeException。如果出异常，在@RestControllerAdvice注释下的CustomExtHandler里面捕获，根据异常种类进行处理。
异常处理的官网地址： https://docs.spring.io/spring-boot/docs/2.1.0.BUILD-SNAPSHOT/reference/htmlsingle/#boot-features-error-handling
https://www.cnblogs.com/platycoden/p/9799900.html
