統(tǒng)一異常處理

系統(tǒng)有一個(gè)統(tǒng)一異常處理的功能，可減少重復(fù)代碼，又便于維護(hù)。

用@ControllerAdvice和@ExceptionHandler兩個(gè)注解來(lái)做異常的統(tǒng)一處理。

@ControllerAdvice：作用于所有@Controller標(biāo)注的Controller類
@ExceptionHandler：作用于所有@RequestMapping標(biāo)注的方法拋出的指定類型的異常。

代碼實(shí)例

ExceptionHandlerAdvice.java

package com.restfeel.advice

import org.springframework.web.bind.annotation.ControllerAdvice
import org.springframework.web.bind.annotation.ExceptionHandler
import org.springframework.web.context.request.WebRequest
import org.springframework.web.servlet.ModelAndView


/**
 * Created by jack on 2017/3/30.
 *
 * 系統(tǒng)全局統(tǒng)一異常處理
 */
@ControllerAdvice
class ExceptionHandlerAdvice {
    @ExceptionHandler(value = Exception::class) //表示捕捉到所有的異常，你也可以捕捉一個(gè)你自定義的異常
    fun exception(exception: Exception, request: WebRequest): ModelAndView {
        val modelAndView = ModelAndView("jsp/error")//error頁(yè)面
        modelAndView.addObject("errorMessage", exception.message)
        modelAndView.addObject("stackTrace", exception.stackTrace)
        return modelAndView

    }
}

error.jsp

<%--
  Created by IntelliJ IDEA.
  User: jack
  Date: 2017/3/30
  Time: 02:08
  To change this template use File | Settings | File Templates.
--%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/functions"
          prefix="fn" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <jsp:include page="header.jsp"></jsp:include>
</head>
<body>
<jsp:include page="top-nav.jsp"></jsp:include>
<div class="col-sm-12">
    <h1>系統(tǒng)異常統(tǒng)一處理</h1>
    <h3>${errorMessage}></h3>
    <h2>Debug</h2>
    <a 
       class="btn btn-primary btn-lg" target="_blank" id="Google">Google</a>
    <a  class="btn btn-info btn-lg"  target="_blank" id="Baidu">Baidu</a>
    <a 
       class="btn btn-default btn-lg"  target="_blank" id="StackOverFlow">StackOverFlow</a>

    <h2>異常堆棧跟蹤日志StackTrace</h2>
    <code>
        <c:forEach items="${stackTrace}" var="line">
            ${line}
        </c:forEach>
    </code>
</div>


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源碼工程：
https://github.com/Jason-Chen-2017/restfeel