eclipse 使用maven 构建springboot +全局异常与局部异常区别

一、controller 局部异常

package com.zzg.springbootone.controller;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 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("local exception-Handler");        return resp;    }}

说明：

• 在controller中加入被@ExceptionHandler修饰的方法即可（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.zzg.springbootone.handler;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 com.zzg.springbootone.controller.MyExceptionResponse;@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("global 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（全局异常）

package com.zzg.springbootone.controller;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 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("local 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

参考自：

• http://jinnianshilongnian.iteye.com/blog/1866350 开涛的@ControllerAdvice（三个作用）
• http://www.tuicool.com/articles/fA7nuii                springboot约定的异常处理体系
• https://spring.io/blog/2013/11/01/exception-handling-in-spring-mvc springMVC异常处理体系
• http://www.baeldung.com/2013/01/31/exception-handling-for-rest-with-spring-3-2/ springMVC异常处理体系

补充异常实体类：MyExceptionResponse.java

package com.zzg.springbootone.controller;import java.io.Serializable;import lombok.Builder;import lombok.Data;@Builder@Datapublic class MyExceptionResponse implements Serializable {/** *  */private static final long serialVersionUID = 1L;private String msg;private String code;public MyExceptionResponse(){}public MyExceptionResponse(String msg, String code) {super();this.msg = msg;this.code = code;}}