weblayerexceptionhandler.java

ssh整合在一起的例子.适合初学者,希望对大家能有一定的帮助作用

package com.softdevelopstudio.exception;

	import javax.servlet.http.HttpServletRequest;
	import org.apache.struts.action.ActionForward;
	import javax.servlet.ServletException;
	import org.apache.struts.config.ExceptionConfig;
	import org.apache.struts.action.ActionMapping;
	import javax.servlet.http.HttpServletResponse;
	import org.apache.struts.action.ActionForm;

	import java.io.*;
	import java.util.Calendar;
	import java.util.Date;
	import java.text.SimpleDateFormat;

	/**
	 *
	 * <p>Title:web层业务异常处理类. </p>
	 *
	 * <p>Description: </p>
	 *
	 * <p>Copyright: Copyright (c) 2008</p>
	 *
	 * <p>Company: </p>
	 *
	 * @author lzx
	 * @version 1.0
	 */
	public class WebLayerExceptionHandler extends org.apache.struts.action.
	        ExceptionHandler {
	    public ActionForward execute(Exception ex,
	                                 ExceptionConfig ae,
	                                 ActionMapping mapping,
	                                 ActionForm formInstance,
	                                 HttpServletRequest request,
	                                 HttpServletResponse response) throws
	            ServletException {
	         BizException biz = null;
	         if (ex instanceof com.softdevelopstudio.exception.BizException) {
	              biz = (BizException) ex;
	         }
	         if(biz!=null)
	            request.setAttribute("msg", biz.toMyString());
	        //如果是业务异常，转到业务提示页面.
	        System.out.println("ex = " + ex.toString());
	        if (ex instanceof com.softdevelopstudio.exception.BizException) {
	            return mapping.findForward("bizReminder");
	        }
	        Calendar calCurrent = Calendar.getInstance();
	        String path = request.getRealPath("/");

	        path += "error/";
	        if (!(new File(path).isDirectory())) {
	            new File(path).mkdir();
	        }

	        String fileName = getFileName(calCurrent);
	        String errorId = getId(calCurrent);
	        try {
	            PrintStream ps = new PrintStream(new FileOutputStream(path +
	                    fileName, true));
	            ps.println("ErrorID : " + errorId);
	            ex.printStackTrace(ps);
	            ps.println("");
	            ps.println("");
	            ps.println("");
	        } catch (FileNotFoundException ex1) {
	            ex1.printStackTrace();
	        }
	        request.setAttribute("errorId", errorId);
	        //如果是系统异常，转到系统错误业面
	        return mapping.findForward("error");
	    }

	    private String getId(Calendar cal) {
	        Date date = cal.getTime();
	        SimpleDateFormat sdf = new SimpleDateFormat("yyMMddHHmmssSSS");
	        String Id = sdf.format(date);
	        Id += Math.round(Math.random() * 10);
	        System.out.println("ID = " + Id);
	        return Id;
	    }

	    private String getFileName(Calendar cal) {
	        Date date = cal.getTime();
	        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	        String today = sdf.format(date) + ".txt";
	        System.out.println("FileName = " + today);
	        return today;
	    }
	}