ADD file via upload

code/QueryArticleServlet.java

@@ -0,0 +1,116 @@
+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.ArrayList;
+
+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.domain.Article;
+
+/**
+ * Servlet implementation class TuserServlet
+ */
+@WebServlet(name = "queryarticleServlet", urlPatterns = { "/query-article" })
+public class QueryArticleServlet extends HttpServlet {
+	 private static final long serialVersionUID = 1L; 
+	   Connection dbconn=null;
+	   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);
+		      }
+		   }
+	   
+	 
+	public void doGet(HttpServletRequest request,
+              HttpServletResponse response)
+              throws ServletException,IOException{
+		
+		
+ArrayList<Article> articleList = null; 
+articleList = new ArrayList<Article>();
+try{
+	 String sql="SELECT * FROM Article";
+     PreparedStatement pstmt = dbconn.prepareStatement(sql);
+ResultSet rst = pstmt.executeQuery();
+while(rst.next()){
+	Article s = new Article();
+  s.setAid(rst.getInt("aid"));
+     s.setUid(rst.getString("uid"));
+    s.setUname(rst.getString("uname"));
+     s.setDate(rst.getDate("date"));
+     s.setTitle(rst.getString("title"));
+     s.setContent(rst.getString("content"));
+     s.setStatics(rst.getString("statics"));
+     s.setMid(rst.getString("mid"));
+     articleList.add(s);
+}
+if(!articleList.isEmpty()){
+    request.getSession().setAttribute("ArticleList",articleList);
+    response.sendRedirect("da-article.jsp");
+}else{
+  response.sendRedirect("error.jsp");
+}
+}catch(SQLException e){
+  e.printStackTrace();
+}
+	}
+//	public void doPost(HttpServletRequest request,
+//    HttpServletResponse response)
+//throws ServletException,IOException{
+//String id=request.getParameter("Doid");
+//try{
+//String sql="SELECT * FROM Schedule WHERE Doid = ?";
+//PreparedStatement pstmt=dbconn.prepareStatement(sql);
+//pstmt.setString(1,id);
+//ResultSet rst=pstmt.executeQuery();
+//if(rst.next()){
+//Tuser tuser = new Tuser();
+//tuser.setUid(rst.getString("Uid"));
+//tuser.setUname(rst.getString("uname"));
+//tuser.setUpassword(rst.getString("upassword"));
+//tuser.setUsex(rst.getString("usex"));
+//tuser.setUage(rst.getString("uage"));
+//tuser.setUtel(rst.getString("utel"));
+//tuser.setCid(rst.getString("cid"));
+//
+//request.getSession().setAttribute("tuser", tuser);
+//response.sendRedirect("displaySchedule.jsp");
+//}else{
+//response.sendRedirect("error.jsp");
+//}	
+//}catch(SQLException e){
+//e.printStackTrace();
+//}
+//}
+
+	      public void destory() {
+	          try {
+	 	         dbconn.close();
+	 	      }catch(Exception e){
+	 		     e.printStackTrace();
+	         }
+	      }
+	   }
+