第二十三章 springboot + 全域異常處理,springboot異常處理
一、單個controller範圍的異常處理
1 package com.xxx.secondboot.web; 2 3 import org.springframework.web.bind.annotation.ExceptionHandler; 4 import org.springframework.web.bind.annotation.RequestMapping; 5 import org.springframework.web.bind.annotation.RequestMethod; 6 import org.springframework.web.bind.annotation.RestController; 7 8 import com.xxx.secondboot.exception.MyExceptionResponse; 9 10 import io.swagger.annotations.Api;11 12 @Api("測試controllerAdvice和全域異常處理")13 @RestController14 @RequestMapping("/advice1")15 public class AdviceController {16 17 @RequestMapping(value = "/test1", method = RequestMethod.GET)18 public String test1() {19 throw new RuntimeException("advice1 - exception1");20 }21 22 @RequestMapping(value = "/test2", method = RequestMethod.GET)23 public String test2() {24 throw new RuntimeException("advice1 - exception2");25 }26 27 @ExceptionHandler(RuntimeException.class)28 public MyExceptionResponse exceptionHandler() {29 MyExceptionResponse resp = new MyExceptionResponse();30 resp.setCode(300);31 resp.setMsg("exception-Handler");32 return resp;33 }34 35 }
說明:
- 在controller中加入被@ExceptionHandler修飾的類即可(在該註解中指定該方法需要處理的那些異常類)
- 該異常處理方法只在當前的controller中起作用
二、全部controller範圍內起作用的異常處理(全域異常處理)
1、全域異常處理類
1 package com.xxx.secondboot.web; 2 3 import javax.servlet.http.HttpServletResponse; 4 5 import org.springframework.web.bind.annotation.ControllerAdvice; 6 import org.springframework.web.bind.annotation.ExceptionHandler; 7 import org.springframework.web.bind.annotation.ResponseBody; 8 import org.springframework.web.bind.annotation.RestController; 9 10 import com.xxx.secondboot.exception.MyExceptionResponse;11 import com.xxx.secondboot.exception.MyRuntimeException;12 13 //@ControllerAdvice(annotations=RestController.class)14 //@ControllerAdvice(basePackages={"com.xxx","com.ooo"})15 @ControllerAdvice16 public class GlobalExceptionHandler {17 @ExceptionHandler(RuntimeException.class)18 // @ExceptionHandler(value={RuntimeException.class,MyRuntimeException.class})19 // @ExceptionHandler//處理所有異常20 @ResponseBody //在返回自訂相應類的情況下必須有,這是@ControllerAdvice註解的規定21 public MyExceptionResponse exceptionHandler(RuntimeException e, HttpServletResponse response) {22 MyExceptionResponse resp = new MyExceptionResponse();23 resp.setCode(300);24 resp.setMsg("exception-Handler");25 // response.setStatus(600);26 return resp;27 }28 }
說明:
- @ControllerAdvice是controller的一個輔助類,最常用的就是作為全域異常處理的切面類
- @ControllerAdvice可以指定掃描範圍
- @ControllerAdvice約定了幾種可行的傳回值,如果是直接返回model類的話,需要使用@ResponseBody進行json轉換
- 返回String,表示跳到某個view
- 返回modelAndView
- 返回model + @ResponseBody
2、controller
1 package com.xxx.secondboot.web; 2 3 import org.springframework.web.bind.annotation.RequestMapping; 4 import org.springframework.web.bind.annotation.RequestMethod; 5 import org.springframework.web.bind.annotation.RestController; 6 7 import io.swagger.annotations.Api; 8 9 @Api("測試controllerAdvice和全域異常處理")10 @RestController11 @RequestMapping("/advice1")12 public class AdviceController {13 14 @RequestMapping(value = "/test1", method = RequestMethod.GET)15 public String test1() {16 throw new RuntimeException("advice1 - exception1");17 }18 19 @RequestMapping(value = "/test2", method = RequestMethod.GET)20 public String test2() {21 throw new RuntimeException("advice1 - exception2");22 }23 24 // @ExceptionHandler(RuntimeException.class)25 // public MyExceptionResponse exceptionHandler() {26 // MyExceptionResponse resp = new MyExceptionResponse();27 // resp.setCode(300);28 // resp.setMsg("exception-Handler");29 // return resp;30 // }31 32 }
注意:
- 同一個異常被局部範圍異常處理器和全域範圍異常處理器同時覆蓋,會選擇小範圍的局部範圍處理器
- 同一個異常被小範圍的異常類和大範圍的異常處理器同時覆蓋,會選擇小範圍的異常處理器
參考自:
- http://jinnianshilongnian.iteye.com/blog/1866350 開濤的@ControllerAdvice(三個作用)
- http://www.tuicool.com/articles/fA7nuii springboot約定的異常處理體系
- https://spring.io/blog/2013/11/01/exception-handling-in-spring-mvc springMVC異常處理體系
- http://www.baeldung.com/2013/01/31/exception-handling-for-rest-with-spring-3-2/ springMVC異常處理體系