spring mvc异常统一处理（使用ControllerAdvice注解）

1、配置

spring 版本：

<org.springframework-version>4.1.9.RELEASEorg.springframework-version>

4.1.9.RELEASE

spring-servlet.xml，注意必须开启注解，即xml要有

<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">


    <annotation-driven />

2、异常统一处理类

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;

/**
 * 捕获异常统一处理
 * @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;

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;

/**
 * 捕获异常统一处理
 * @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;
	}

}

自定义异常类BussinessException.java

package org.as.asjee.core.exception;

/**
 * 业务异常
 * @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;

    //业务类型
    private String bizType;
    //业务代码
    private int bizCode;
    //错误信息
    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;
    }

}

package org.as.asjee.core.exception;

/**
 * 业务异常
 * @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;
	
	//业务类型
	private String bizType;
	//业务代码
	private int bizCode;
	//错误信息
	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{

    @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("出错鸟。。。。。。。。。");
    }

    @RequestMapping("login3")
    public String login3() throws Exception {
        throw new BusinessException("业务执行异常");
    }

    //此方法抛出的异常不是由GlobalExceptionHandler处理
    //而是在catch块处理
    @RequestMapping("login4")
    public String login4() {
        try {
            throw new BusinessException("业务执行异常");
        } catch (BusinessException e) {
            e.printStackTrace();
        }
        return "login";
    }

}

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{

	@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("出错鸟。。。。。。。。。");
	}	
	
	@RequestMapping("login3")
	public String login3() throws Exception { 
		throw new BusinessException("业务执行异常");
	}
	
	//此方法抛出的异常不是由GlobalExceptionHandler处理
	//而是在catch块处理
	@RequestMapping("login4")
	public String login4() { 
		try {
			throw new BusinessException("业务执行异常");
		} catch (BusinessException e) {
			e.printStackTrace();
		}
		return "login";
	}
	
}

4、JSP页面

sql_error.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" %>
>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title heretitle>
head>
<body>
    <h1>ERROR MESSAGEh1>
    <p>${message}p>
body>
html>

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







	
ERROR MESSAGE
	
${message}

5、简要说明

在Controller中抛出的异常，当没有被catch处理时，GlobalExceptionHandler中定义的处理方法可以起作用，在方法写明注解@ExceptionHandler，并注明其异常类即可。此种方法不仅可以作用于Controller，同样的在DAO层、service层也可，都可以由GlobalExceptionHandler进行处理。此种写法减少代码的入侵，值得推荐。

异常的统一处理只是注解ControllerAdvice用处之一，有兴趣了解更多的，请到spring官网查阅。