systemexceptionhandler.java

这个主要是办公自动化系统的源代码

package com.ygp.oa.web;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ExceptionHandler;
import org.apache.struts.config.ExceptionConfig;


import com.ygp.oa.managers.SystemException;

public class SystemExceptionHandler extends ExceptionHandler {	
	
	private static Log logger=LogFactory.getLog(SystemExceptionHandler.class);
	
	public ActionForward execute(
			Exception ex, //后台传递过来的exception通过orgaction throw抛出，传来exception
			ExceptionConfig ae,//代表exception中的所有配置
			ActionMapping mapping, 
			ActionForm formInstance,
			HttpServletRequest request, 
			HttpServletResponse response)throws ServletException {
		
		ActionForward forward=null;
		if(ae.getPath()!=null){
			forward=new ActionForward(ae.getPath());
		}else{
			forward=mapping.getInputForward();
		}
		
		logger.debug("出现异常",ex);
		ex.printStackTrace();
		
		if(ex instanceof SystemException){
			SystemException se=(SystemException)ex;
			//取出key值
			String key=se.getKey();
			ActionMessage 	error=null;
			if(key==null){//处理默认情况<exception key="errors.detials" >
				error=new ActionMessage(ae.getKey(),se.getMessage());
			}else{
				if(se.getValues()!=null){
					error=new ActionMessage(key,se.getValues());
				}else{
					error=new ActionMessage(key);
				}				
			}
			//property相当于detailsorror,可以用key作为property
			//forward是要转到什么地方，即actionforward，根据path创建,
			//scope 设置为ae.getScope,此处设置为request会报错
			this.storeException(request, key, error, forward, ae.getScope());
			return forward;
			
		}
		return super.execute(ex, ae, mapping, formInstance, request, response);
	}	
}