spring mvc異常統一處理（ControllerAdvice註解）
1、配置
spring 版本：
<org.springframework-version>4.1.9.RELEASE</org.springframework-version><annotation-driven /><?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing
infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving
up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources
in the /WEB-INF/views directory -->
<beans:bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan base-package="org.as.asjee" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans:beans>2、異常統一處理類
package org.as.asjee.core.exception;
import java.sql.SQLException;
import javax.servlet.http.HttpServletRequest;
import org.as.asjee.core.log.AsJEELogger;
import org.as.asjee.core.log.AsJEELoggerFactory;
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.servlet.ModelAndView;
/**
* 捕獲異常統一處理
* @description TODO
* @author chen.gs
* @create date 2016年4月28日
* @modified by
* @modify date
* @version v1.0
*/
@ControllerAdvice
public class GlobalExceptionHandler {
private final static AsJEELogger LOG = AsJEELoggerFactory.getLogger(GlobalExceptionHandler.class);
private final static String EXPTION_MSG_KEY = "message";
@ExceptionHandler(BusinessException.class)
@ResponseBody
public void handleBizExp(HttpServletRequest request, Exception ex){
LOG.info("Business exception handler " + ex.getMessage() );
request.getSession(true).setAttribute(EXPTION_MSG_KEY, ex.getMessage());
}
@ExceptionHandler(SQLException.class)
public ModelAndView handSql(Exception ex){
LOG.info("SQL Exception " + ex.getMessage());
ModelAndView mv = new ModelAndView();
mv.addObject("message", ex.getMessage());
mv.setViewName("sql_error");
return mv;
}
}
package org.as.asjee.core.exception;
/**
* 業務異常
* @description TODO
* @author chen.gs
* @create date 2016年4月28日
* @modified by
* @modify date
* @version v1.0
*/
public class BusinessException extends Exception{
private static final long serialVersionUID = 1L;
//業務類型
private String bizType;
//業務代碼
private int bizCode;
//錯誤信息
private String message;
public BusinessException(String bizType, int bizCode, String message){
super(message);
this.bizType = bizType;
this.bizCode = bizCode;
this.message = message;
}
public BusinessException(String message){
super(message);
this.bizType = "";
this.bizCode = -1;
this.message = message;
}
public BusinessException(String bizType, String message){
super(message);
this.bizType = bizType;
this.bizCode = -1;
this.message = message;
}
public BusinessException(int bizCode, String message){
super(message);
this.bizType = "";
this.bizCode = bizCode;
this.message = message;
}
public String getBizType() {
return bizType;
}
public void setBizType(String bizType) {
this.bizType = bizType;
}
public int getBizCode() {
return bizCode;
}
public void setBizCode(int bizCode) {
this.bizCode = bizCode;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}3、controller
package org.as.asjee.core.security.web;
import java.sql.SQLException;
import javax.annotation.Resource;
import org.as.asjee.core.exception.BusinessException;
import org.as.asjee.core.security.model.User;
import org.as.asjee.core.security.service.UserService;
import org.as.asjee.core.service.ServiceFacade;
import org.as.asjee.core.web.AbstractController;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/security/user")
public class UserController extends AbstractController<User>{
@Resource
private UserService userService;
@Resource
private ServiceFacade serviceFacade;
@RequestMapping("login")
public String login() {
return "login";
}
@RequestMapping("login2")
public String login2() throws Exception {
throw new SQLException("出錯鳥。。。。。。。。。");
}
@RequestMapping("login3")
public String login3() throws Exception {
throw new BusinessException("業務執行異常");
}
//此方法拋出的異常不是由GlobalExceptionHandler處理
//而是在catch塊處理
@RequestMapping("login4")
public String login4() {
try {
throw new BusinessException("業務執行異常");
} catch (BusinessException e) {
e.printStackTrace();
}
return "login";
}
}
4、JSP頁面
sql_error.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" %>
<!DOCTYPE html">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>ERROR MESSAGE</h1>
<p>${message}</p>
</body>
</html>5、簡要說明
在Controller中拋出的異常，當沒有被catch處理時，GlobalExceptionHandler中定義的處理方法可以起作用，在方法寫明註解@ExceptionHandler，並註明其異常類即可。此種方法不僅可以作用於Controller，同樣的在DAO層、service層也可，都可以由GlobalExceptionHandler進行處理。此種寫法減少代碼的入侵，值得推薦。
異常的統一處理只是註解ControllerAdvice用處之一，有興趣瞭解更多的，請到spring官網查閱。