teeth/code/ArticleServlet.java

package com.demo;

import java.io.IOException;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.*;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.dao.Dao;
import com.dao.ArticleDao;
import com.dao.ArticleDaoImpl;
import com.domain.Article;



/**
 * Servlet implementation class PostCheckServlet
 */
@WebServlet(name ="ArticleServlet",urlPatterns={"/Article.do"})
public class ArticleServlet extends HttpServlet implements Dao {
	private static final long serialVersionUID = 1L;
	
//	public void init() {   
//		   String driver = "com.mysql.cj.jdbc.Driver";
//		      String dburl = "jdbc:mysql://127.0.0.1:3306/tooth?useSSL=true";
//		      String username = "root";
//		      String password = "root";
//		      try{
//		          Class.forName(driver); // 加载驱动程序
//		          // 创建连接对象
//		          dbconn = DriverManager.getConnection(
//		      	                     dburl,username,password);
//		      }catch(ClassNotFoundException e1){
//		          System.out.println(e1);
//		          getServletContext().log("驱动程序类找不到！");   
//		      }catch(SQLException e2){
//		    	  System.out.println(e2);
//		      }
//	}
//	 java.sql.Connection dbconn = null; public void init() { String driver =
//	 "com.mysql.jdbc.Driver"; String dburl =
//	"jdbc:mysql://127.0.0.1:3306/xinxin?useSSL=true"; String username = "root";
//	 String password = "zhao157"; try{ Class.forName(driver); // 加载驱动程序 // 创建连接对象
//	  dbconn = DriverManager.getConnection(dburl,username,password);
//	 }catch(ClassNotFoundException e1){ System.out.println(e1);
//	  getServletContext().log("驱动程序类找不到！"); }catch(SQLException e2){
//	 System.out.println(e2); } }
	 
       

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	public void doGet(HttpServletRequest request,
            HttpServletResponse response)
            throws ServletException,IOException{
		doPost(request,response);
		
	}
//	public void doGet(HttpServletRequest request,
//            HttpServletResponse response)
//            throws ServletException,IOException{
//		
//		
//ArrayList<Dynamic> dynamicList = null; 
//dynamicList = new ArrayList<Dynamic>();
//try{
//	 String sql="SELECT * FROM Dynamic";
//   PreparedStatement pstmt = dbconn.prepareStatement(sql);
//ResultSet rst = pstmt.executeQuery();
//while(rst.next()){
//Dynamic s = new Dynamic();
//s.setDyid(rst.getInt("dyid"));
//   s.setUid(rst.getString("uid"));
//  s.setUname(rst.getString("uname"));
//   s.setContent(rst.getString("content"));
//   s.setRtime(rst.getDate("rtime"));
//  
//dynamicList.add(s);
//}
//if(!dynamicList.isEmpty()){
//  request.getSession().setAttribute("DynamicList",dynamicList);
//  response.sendRedirect("da-dynamic.jsp");
//}else{
//response.sendRedirect("error.jsp");
//}
//}catch(SQLException e){
//e.printStackTrace();
//}
//	}

	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
			  String action = request.getParameter("action");
			     if(action!=null&&action.equals("remove")){
			         removeArticle(request,response);
			     } else if (action.equals("list")){
			         listArticle(request,response);
			     }else {
			    	 System.out.println("失败");
			     }
		
	}
	
	 private void listArticle(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
    	 // TODO Auto-generated method stub
		 
		 ArticleDao dao = new ArticleDaoImpl();
		 try{
			
			 List<Article> list= dao.listArticle();
			 request.setAttribute("ArticleList",list);
			 
		 }catch(SQLException e) {}
		RequestDispatcher rd = request.getRequestDispatcher("da-article.jsp");
		 
		rd.forward(request, response);

     }


			private void removeArticle(HttpServletRequest request, HttpServletResponse response)  throws ServletException, IOException{
				// TODO Auto-generated method stub
				int Aid=Integer.parseInt(request.getParameter("Aid"));
				ArticleDao dao=new ArticleDaoImpl();
				try {
					int success=dao.removeArticle(Aid);
					if(success>0) {
						listArticle(request,response);
						}
					}catch(SQLException e) {}
				}
}