20e1a954dd89001d1260e316b446d497

一个相对比较简单的留言簿！功能还比较齐全！

package com.pure35.servlet;

import java.io.IOException;

import java.util.List;

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

import com.pure35.database.MessageDao;

public class UpdateMessage extends HttpServlet {

	private static final long serialVersionUID = 1L;

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		//得到要修改留言的ID 该id是由用户单击“修改”连接时
		//<a href='UpateMessage?id=message.getId()' >修改</a>得到的
		String mid=request.getParameter("id");
		int id=Integer.parseInt(mid);
		
		//通过得到的id查询  该留言的详细信息 
		String sql="select * from message where id="+id;
		MessageDao mdao=new MessageDao();
		List messagelist=mdao.queryMessage(sql);
		
		//传递得到的留言信息
		request.setAttribute("updatemessage", messagelist);
		
		//跳转到留言显示页面
		request.getRequestDispatcher("modifymessage.jsp").forward(request, response);
	}
}