springmvc 统一处理异常

1.自定义统一异常处理器

自定义Exception实现 HandlerExceptionResolver接口或继承AbstractHandlerExceptionResolver类

1.实现接口HandlerExceptionResolver

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package com.jay.platform.exception.handler;   import java.io.IOException; import java.net.ConnectException; import java.net.SocketTimeoutException; import java.util.Date;   import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;   import org.apache.log4j.Logger; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.ModelAndView;   import com.jay.platform.exception.AjaxException; import com.jay.platform.exception.BusinessException;   /**  *  * @ClassName: ExceptionHandler  * @Description: 统一异常处理 ， 注意这里可以处理Controller层抛出的异常，但不处理Controller捕获的异常(Controller捕获的异常，这里不再处理)  * @author Jay He  * @date 2014年11月4日 上午10:22:11  *  */ public class ExceptionHandler implements HandlerExceptionResolver {     private static final Logger LOGGER = Logger         .getLogger(ExceptionHandler.class);       @Override     public ModelAndView resolveException(HttpServletRequest request,         HttpServletResponse response, Object handler, Exception ex) {     LOGGER.error(new Date().toLocaleString() + "异常信息", ex);     if (ex instanceof NumberFormatException) {         return new ModelAndView("exception/number");     } else if (ex instanceof NullPointerException) {         return new ModelAndView("exception/null");     } else if (ex instanceof BusinessException) {         return new ModelAndView("exception/business");     } else if (ex instanceof SocketTimeoutException         || ex instanceof ConnectException) {         try {         response.getWriter().write("网络异常");         } catch (IOException e) {         e.printStackTrace();         }         return new ModelAndView("exception/net_error");     }else if(ex instanceof AjaxException){        System.out.println("-=-=");     }     return new ModelAndView("exception/exception");     }   }

2.继承AbstractHandlerExceptionResolver类

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package com.jay.platform.exception.handler;   import java.io.IOException; import java.net.ConnectException; import java.net.SocketTimeoutException; import java.util.Date;   import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;   import org.apache.log4j.Logger; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver;   import com.jay.platform.exception.AjaxException; import com.jay.platform.exception.BusinessException;   /**  *  * @ClassName: ExceptionHandler  * @Description: 统一异常处理 ， 注意这里可以处理Controller层抛出的异常，但不处理Controller捕获的异常(Controller捕获的异常，这里不再处理)  * @author Jay He  * @date 2014年11月4日 上午10:22:11  *  */ public class ExceptionHandler extends AbstractHandlerExceptionResolver{     private static final Logger LOGGER = Logger         .getLogger(ExceptionHandler.class);       @Override     protected ModelAndView doResolveException(HttpServletRequest request,         HttpServletResponse response, Object handler, Exception ex) {

LOGGER.error(new Date().toLocaleString() + "异常信息", ex); if (ex instanceof NumberFormatException) { return new ModelAndView("exception/number"); } else if (ex instanceof NullPointerException) { return new ModelAndView("exception/null"); } else if (ex instanceof BusinessException) { return new ModelAndView("exception/business"); } else if (ex instanceof SocketTimeoutException || ex instanceof ConnectException) { try { response.getWriter().write("网络异常"); } catch (IOException e) { e.printStackTrace(); } return new ModelAndView("exception/net_error"); }else if(ex instanceof AjaxException){ System.out.println("-=-="); } return new ModelAndView("exception/exception");

}}

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在配置文件中添加自定义异常处理模块

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1 2	<!-- Spring MVC的统一异常处理 -->    <bean class="com.jay.platform.exception.handler.ExceptionHandler" id="exceptionResolver">  </bean>

错误页面展示：

error.jsp

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1 2	<%@ page language="java" contentType="text/html; charset=UTF-8"     pageEncoding="UTF-8"%>

Error页面

出错信息

错误描述

${errorTips }







错误异常信息栈



${ex }




eception.jsp

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1 2	<%@ page language="java" contentType="text/html; charset=UTF-8"     pageEncoding="UTF-8"%>

Exception页面

模块开发中，请稍后。。。。。。

2.基于@ControllerAdvice注解实现统一异常处理,可方便返回普通异常和Ajax异常信息

自定义Web层异常处理

WebExceptionHandler.java

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package com.jay.platform.exception.handler;   import java.io.IOException; import java.net.ConnectException; import java.net.SocketTimeoutException;   import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;   import org.apache.log4j.Logger; import org.apache.shiro.authz.UnauthorizedException; import org.springframework.http.HttpStatus; import org.springframework.web.bind.ServletRequestUtils; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseStatus; import org.springframework.web.context.request.NativeWebRequest; import org.springframework.web.servlet.ModelAndView;   import com.jay.platform.exception.AjaxException; import com.jay.platform.utils.DateUtil;   /**  * @ClassName: WebExceptionHandler  * @Description: Web层异常处理器,  -- 这里可以根据不同的异常，写多个方法去处理， 可以处理跳转页面请求，跳到异常指定的错误页，  *                                                       也可以处理Ajax请求，根据不通过异常，在页面输出不同的提示信息  *                operateExp          :   处理普通请求  *                operateExpAjax      ：       处理Ajax请求  * @author Jay He  * @date 2015年5月27日 下午5:16:37  *  */ @ControllerAdvice public class WebExceptionHandler {           Logger logger =  Logger.getLogger(WebExceptionHandler.class);     /*      * 如果抛出UnauthorizedException，将被该异常处理器截获来显示没有权限信息      */     @ExceptionHandler({ UnauthorizedException.class })     @ResponseStatus(HttpStatus.UNAUTHORIZED)     public ModelAndView unauthenticatedException(NativeWebRequest request,         UnauthorizedException e) {     ModelAndView mv = new ModelAndView();     mv.addObject("exception", e);     mv.setViewName("base/exception/unauthorized");     return mv;     }       /**      * @Title: operateExp      * @Description: 全局异常控制，记录日志      *              任何一个方法发生异常，一定会被这个方法拦截到。然后，输出日志。封装Map并返回给页面显示错误信息：      *              特别注意：返回给页面错误信息只在开发时才使用，上线后，要把错误页面去掉，只打印log日志即可，防止信息外漏      * @param: @param ex      * @param: @param request      * @return: String      * @throws:      */     @ExceptionHandler(RuntimeException.class)     public String operateExp(RuntimeException ex, HttpServletRequest request) {     logger.error(ex.getMessage(), ex);     logger.info("************* ------ 异常信息已记录（" + DateUtil.getNow("yyyy-MM-dd HH:mm:ss")+ "） ------- ***********");     request.setAttribute("errorTips", ex.getMessage());     request.setAttribute("ex", ex);     return "exception/error";     }           /*      * 记录Ajax异常日志，并将错误Ajax错误信息传递(回写)给前台展示,      * 前台的jQuery的Ajax请求error中，可以打印错误提示信息   --  data.responseText   : 这里即是后台传递的错误提示      * eg:      * $.ajax({                 type : 'get',                 dataType : "json",                 url : ctx + '/test/test',                 accept:"application/json",                 success : function(data) {                     console.log(data);                 },                 error : function(data, errorThrown) {                     console.log(data);                     alert("error" + data.responseText);                 }             });      */     @ExceptionHandler(AjaxException.class)     public void operateExpAjax(AjaxException ex, HttpServletResponse response) throws IOException {     logger.error(ex.getMessage(), ex);     logger.info("************* ------ 异常信息已记录（" + DateUtil.getNow("yyyy-MM-dd HH:mm:ss")+ "） ------- ***********");     //将Ajax异常信息回写到前台，用于页面的提示     response.getWriter().write("sorry,Ajax请求出错！！！");     }                 @ExceptionHandler(ConnectException.class)     public void operateExpNetException(ConnectException ex, HttpServletResponse response) throws IOException {     logger.error(ex.getMessage(), ex);     logger.info("************* ------ 异常信息已记录（" + DateUtil.getNow("yyyy-MM-dd HH:mm:ss")+ "） ------- ***********");     //将Ajax异常信息回写到前台，用于页面的提示         response.getWriter().write("sorry,网络连接出错！！！");     } }

异常测试

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package com.jay.platform.controller.test;   import java.net.ConnectException; import java.util.HashMap; import java.util.Map;   import org.springframework.stereotype.Component; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody;   import com.jay.platform.annotation.AjaxExceptionHandler; import com.jay.platform.exception.AjaxException;   @Component @Controller() @RequestMapping("exception") public class ExceptionHandlerTestController {           @RequestMapping("test")     public String getIt(){     return "exception/test/test";     }           @RequestMapping(value="/common",method=RequestMethod.GET)     public Map<string, object=""> commonExcetion() throws RuntimeException{     Map<string, object=""> map = new HashMap<string, object="">();     int i=10;           if(i==10){     throw new RuntimeException("运行时异常");     }           return map;     }           @AjaxExceptionHandler(tips="试一把", description="哈啊")     @RequestMapping(value="/ajax/net",method=RequestMethod.GET)     @ResponseBody     public Map<string, object=""> AjaxConnectionExcetion() throws ConnectException{     Map<string, object=""> map = new HashMap<string, object="">();     int i=10;           if(i==10){     throw new ConnectException("测试    网络连接     异常");     }           return map;     }           @RequestMapping(value="/ajax/common",method=RequestMethod.GET)     @ResponseBody     public Map<string, object=""> AjaxExcetion() throws AjaxException{     Map<string, object=""> map = new HashMap<string, object="">();     int i=10;           if(i==10){     throw new AjaxException("测试Ajax异常");     }           return map;     } } </string,></string,></string,></string,></string,></string,></string,></string,></string,>

前台页面

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<%@ page language="java" contentType="text/html; charset=UTF-8"     pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

<%@ include file="../../common/meta.jsp"%> <script src="${jqueryCtxPath }/jquery-ui-1.11.2.custom/jquery-ui.min.js"></script> 
普通的异常处理测试网络连接异常的Ajax测试
普通异常的Ajax测试<script type="text/javascript"> $(document).ready(function() { $("#test1").click(function(){ $.ajax({ type : 'get', dataType : "json", url : ctx + '/exception/ajax/net', accept:"application/json", success : function(data) { console.log(data);
}, error : function(data, errorThrown) { console.log(data); alert("error" + data.responseText); } }); }); $("#test2").click(function(){ $.ajax({ type : 'get', dataType : "json", url : ctx + '/exception/ajax/common', accept:"application/json", success : function(data)
{ console.log(data); }, error : function(data, errorThrown) { console.log(data); alert("error" + data.responseText); } }); }); }); </script>

页面结果演示