deletemessage.java

来自「一个相对比较简单的留言簿！功能还比较齐全！」· Java 代码 · 共 43 行

package com.pure35.servlet;

import java.io.IOException;



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 DeleteMessage 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()' >删除</a>得到的
		String mid=request.getParameter("id");
		int id=Integer.parseInt(mid);
		
		//通过得到的id查询  删除该留言的详细信息 
		String sql="delete from message where id="+id;
		//创建一个mdao对象调用MessageDao中的
		//updateMessage(sql)方法删除该留言
		MessageDao mdao=new MessageDao();
		mdao.updateMessage(sql);
		
		//跳转到留言显示页面
		request.getRequestDispatcher("ShowMessage").forward(request, response);	
	}
}