• 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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    <!-- 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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    <%@ 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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    <%@ 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>  <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
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  • 原文地址：https://www.cnblogs.com/root429/p/9251389.html
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