mvcservlet.java

一个简单的留言网上留言系统

package cm.li.servlet;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class MVCServlet extends HttpServlet
{
  public void doGet(HttpServletRequest req,HttpServletResponse resp) throws IOException
  {
  	this.doPost(req,resp);
   	
  }	
  public void doPost(HttpServletRequest req,HttpServletResponse resp) throws IOException
  {
  	//传一值只用一次
  	//req.setAttribute("name","LiQiang");这个传不了如果用sendRedirect;
  	//req.getSession().setAttribute("name","LiQiang");可以传但是严重影像性能
  	//resp.sendRedirect("MVCDemo.jsp");客户端跳转
  	req.setAttribute("name","LiQiang");
  	/*RequestDispatcher rd=null;
  	rd=req.getRequestDispatcher("MVCDemo.jsp");
  	try
  	{
  	 rd.forward(req,resp);
  	}
  	catch(Exception e)
  	{
  		
  	}*/
  	try
  	{
  		//完成与<jsp:forward>同样的功能
  	 req.getRequestDispatcher("MVCDemo.jsp").forward(req,resp);
    }
    catch(Exception e)
    {}  
  }
	
	
}