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

返回String，表示跳到某个view

返回modelAndView

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：

同一个异常被局部范围异常处理器和全局范围异常处理器同时覆盖，会选择小范围的局部范围处理器

同一个异常被小范围的异常类和大范围的异常处理器同时覆盖，会选择小范围的异常处理器

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。