springboot全局异常处理详解

2019-11-26 12:21:09

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来源：转载

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一、单个controller范围的异常处理

package com.xxx.secondboot.web;import org.springframework.web.bind.annotation.ExceptionHandler;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RestController;import com.xxx.secondboot.exception.MyExceptionResponse;import io.swagger.annotations.Api;@Api("测试controllerAdvice和全局异常处理")@RestController@RequestMapping("/advice1")public class AdviceController {  @RequestMapping(value = "/test1", method = RequestMethod.GET)  public String test1() {    throw new RuntimeException("advice1 - exception1");  }  @RequestMapping(value = "/test2", method = RequestMethod.GET)  public String test2() {    throw new RuntimeException("advice1 - exception2");  }  @ExceptionHandler(RuntimeException.class)  public MyExceptionResponse exceptionHandler() {    MyExceptionResponse resp = new MyExceptionResponse();    resp.setCode(300);    resp.setMsg("exception-Handler");    return resp;  }}

说明：

在controller中加入被@ExceptionHandler修饰的类即可（在该注解中指定该方法需要处理的那些异常类）
该异常处理方法只在当前的controller中起作用

二、全部controller范围内起作用的异常处理（全局异常处理）

1、全局异常处理类

package com.xxx.secondboot.web;import javax.servlet.http.HttpServletResponse;import org.springframework.web.bind.annotation.ControllerAdvice;import org.springframework.web.bind.annotation.ExceptionHandler;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.bind.annotation.RestController;import com.xxx.secondboot.exception.MyExceptionResponse;import com.xxx.secondboot.exception.MyRuntimeException;//@ControllerAdvice(annotations=RestController.class)//@ControllerAdvice(basePackages={"com.xxx","com.ooo"})@ControllerAdvicepublic class GlobalExceptionHandler {  @ExceptionHandler(RuntimeException.class)  //  @ExceptionHandler(value={RuntimeException.class,MyRuntimeException.class})  //  @ExceptionHandler//处理所有异常  @ResponseBody //在返回自定义相应类的情况下必须有，这是@ControllerAdvice注解的规定  public MyExceptionResponse exceptionHandler(RuntimeException e, HttpServletResponse response) {    MyExceptionResponse resp = new MyExceptionResponse();    resp.setCode(300);    resp.setMsg("exception-Handler");    //    response.setStatus(600);    return resp;  }}

说明：

@ControllerAdvice是controller的一个辅助类，最常用的就是作为全局异常处理的切面类
@ControllerAdvice可以指定扫描范围
@ControllerAdvice约定了几种可行的返回值，如果是直接返回model类的话，需要使用@ResponseBody进行json转换
1. 返回String，表示跳到某个view
2. 返回modelAndView
3. 返回model + @ResponseBody

2、controller

package com.xxx.secondboot.web;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RestController;import io.swagger.annotations.Api;@Api("测试controllerAdvice和全局异常处理")@RestController@RequestMapping("/advice1")public class AdviceController {  @RequestMapping(value = "/test1", method = RequestMethod.GET)  public String test1() {    throw new RuntimeException("advice1 - exception1");  }  @RequestMapping(value = "/test2", method = RequestMethod.GET)  public String test2() {    throw new RuntimeException("advice1 - exception2");  }  //  @ExceptionHandler(RuntimeException.class)  //  public MyExceptionResponse exceptionHandler() {  //    MyExceptionResponse resp = new MyExceptionResponse();  //    resp.setCode(300);  //    resp.setMsg("exception-Handler");  //    return resp;  //  }}

注意：