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Thread: Problem in MYSQL data base Connectivity with servelet

  1. #1
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    Arrow Problem in MYSQL data base Connectivity with servelet

    Hi
    I m trying to pass the arraylist from Servelet to JSP page Which data is get t from My SQL data base.Plz anyone help me whats wrong in my code part


    Login.java

    package com;
     
    import java.io.IOException;
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.ResultSet;
    import java.sql.SQLException;
    import java.sql.Statement;
    import java.util.ArrayList;
    import java.util.List;
     
    import javax.servlet.RequestDispatcher;
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    public class Login extends HttpServlet {
    private static final long serialVersionUID = 1L;
     
    public Login() {
    super();
    }
     
    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
     
    	HttpSession session = request.getSession(true);
     
    	response.setContentType("text/html");
     
     
    	ArrayList<String>items1 = new  ArrayList<String>();
    	ArrayList <String>items2 = new ArrayList<String>();
     
    	try{
     
    			String url = "jdbc:mysql://localhost:3306/atopfinal";
    			String driver = "com.mysql.jdbc.Driver";
    			Class.forName(driver).newInstance();
    			Connection conn;
    			conn = DriverManager.getConnection(url, "root","root");
    			Statement s = conn.createStatement ();
    			s.executeQuery ("SELECT * from beml_112_gps");
    			ResultSet rs = s.getResultSet ();
    		while (rs.next ()) {
    	        items1.add(rs.getString ("LAT"));
    	        items2.add(rs.getString ("LON")); 
     
    		}
    		rs.close ();
    		s.close ();
    	}
     
    		catch(Exception ee){
    			System.out.println(ee.toString());	
    		} 
    		 String destination = "/FirstJSP.jsp"; 
    		    request.setAttribute("items1",items1);
    		    request.setAttribute("items2",items2);
    	        RequestDispatcher rd = getServletContext().getRequestDispatcher(destination);
    			   rd.forward(request, response);
    	       // request.getRequestDispatcher("FirstJSP.jsp").forward(request, response);
     
     
     
        }
    }



    FirstJSP.jsp

    <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
     pageEncoding="ISO-8859-1"%>`
     <%@ page import="java.util.ArrayList" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org   /TR/html4/loose.dtd">`
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>Insert title here</title>`
    </head>
    <body>
    <form action="Login" method="post">
     
    <input type="submit" value="submit"/><br>
    <%
    ArrayList <String> str1=(ArrayList <String>)request.getAttribute("items1");
    ArrayList <String> str2=(ArrayList <String>)request.getAttribute("items2");
     
     out.println(str1);
     out.println(str2);
     if(request.getAttribute("items1")!=(""))
    	 out.println(request.getAttribute("items1"));
    	 else 
    	 out.println("");
    if(request.getAttribute("items2")!=(""))
    out.println(request.getAttribute("items2"));
    else 
    out.println("");
     
    %>
     </form>
     </body>
    </html>
    Last edited by pbrockway2; April 23rd, 2013 at 12:49 AM. Reason: code tags added


  2. #2
    Super Moderator pbrockway2's Avatar
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    Default Re: Problem in MYSQL data base Connectivity with servelet

    Hi kalaicse30, welcome to the forums.

    I've added code tags to your post. Basically you put [code] at the start of a section of code and [/code] at the end so that the code ends up readable.

  3. #3
    Super Moderator jps's Avatar
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    Default Re: Problem in MYSQL data base Connectivity with servelet

    Welcome kalaicse
    Quote Originally Posted by kalaicse30@gmail.com View Post
    Hi
    I m trying to pass the arraylist from Servelet to JSP page Which data is get t from My SQL data base.
    I do not understand your question. Can you ask it a different way?

  4. #4
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    Arrow Re: Problem in MYSQL data base Connectivity with servelet

    Quote Originally Posted by jps View Post
    Welcome kalaicseI do not understand your question. Can you ask it a different way?
    Hi,
    Im trying to pass array list from servlet to jsp page.but it always shows null values.i do not know whether it s problem from data base connectivity or passing array list.

  5. #5
    Super Moderator jps's Avatar
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    Default Re: Problem in MYSQL data base Connectivity with servelet

    Print your array list and see what is in it just before you try to serve it

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