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Thread: http500

  1. 11-19-2012, 09:20 AM #1
    sachi89
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    Exclamation http500

    HTTP Status 500 -
    type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    java.lang.NumberFormatException: For input string: ""
    java.lang.NumberFormatException.forInputString(Unk nown Source)
    java.lang.Integer.parseInt(Unknown Source)
    java.lang.Integer.parseInt(Unknown Source)
    myPack.SaveServlet.doGet(SaveServlet.java:38)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:617)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:717)

    note The full stack trace of the root cause is available in the Apache Tomcat/6.0.35 logs.
    Apache Tomcat/6.0.35
    This is wat i get while running the project.im postin the codes here.....
    form
    Java Code: 
    <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!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>Form</title>
</head>
<body>
<form action="SaveServlet">
First Name: <input type="text" name="firstname"><br>
Last Name:<input type="text" name="lastname"><br>
Email ID:<input type="text" name="email_id"><br>
Phone number:<input type="text" name="phone_number"><br>
Address:<input type="text" name="address"><br>
Purchasing Item:<input type="text" name="purchasing_item"><br>
Payment Mode: <select name="paymentment_mode">
<option>Visa</option>
<option>Master</option>
<option>Mastro</option>
<option>Amex</option>
</select><br>
Card number:<input type="text" name="card_number"><br>
<input type="submit" value="Save"></input>
</form>
</body>
</html>
 servlet

package myPack;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class SaveServlet
 */
public class SaveServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

    /**
     * Default constructor. 
     */
    public SaveServlet() {
        // TODO Auto-generated constructor stub
    }
/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		String s1=request.getParameter("firstname");
		System.out.println(s1);
		
		String s2=request.getParameter("lastname");
		System.out.println(s2);
		
		String s3=request.getParameter("email_id");
		System.out.println(s3);
		
		String s4=request.getParameter("phone_number");
		int s41=Integer.parseInt(s4);
		System.out.println(s41);

		String s5=request.getParameter("address");
		System.out.println(s5);
		
		String s6=request.getParameter("purchasing_item");
		System.out.println(s6);
		
		String s7=request.getParameter("payment_mode");
		System.out.println(s7);

		String s8=request.getParameter("card_number");
		int s81=Integer.parseInt(s8);
		System.out.println(s8);
		
		String c="jdbc:mysql://localhost:3306/test";
		System.out.println("Done1");
		
		
		Connection con=null;
		
		try{
		
			Class.forName("com.mysql.jdbc.Driver").newInstance();
			System.out.println("Done2");
			
			con = DriverManager.getConnection(c, "root", "MyNewPass");
			System.out.println("Done3");
			
			PreparedStatement ps=null;
			System.out.println("Done4");
			
			String qs = "insert into table1 values(?,?,?,?,?,?,?,?);";
			ps = con.prepareStatement(qs);
			ps.setString(1,s1);
			ps.setString(2,s2);
			ps.setString(3,s3);
			ps.setInt(4,s41);
			ps.setString(5,s5);
			ps.setString(6,s6);
			ps.setString(7,s7);
			ps.setInt(8,s81);
			System.out.println("Success");
			ps.execute();
			con.close();
	
		}
		catch (Exception e) {
		// TODO: handle exception
			System.out.println("Failed");}}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
	}

}
    Last edited by sachi89; 11-20-2012 at 06:23 AM.
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  2. 11-19-2012, 11:03 AM #2
    Tolls
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    Default Re: http500

    Please use [code] tags [/code] when posting code.
    Unformatted code is hard to read.

    You are trying to parse an empty string to an Integer.
    Are you actually sending anything in that field?
    Please do not ask for code as refusal often offends.
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  3. 11-19-2012, 11:04 AM #3
    SurfMan
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    Default Re: http500

    The answer is in the error message, for those who actually *read* the error message: For input string: "" myPack.SaveServlet.doGet(SaveServlet.java:38).
    In English it says: I tried to parse a String but it was empty. This happened on line 38 of your code.
    Now, go and find line 38 and find out why the parameter was empty...
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  4. 11-20-2012, 06:28 AM #4
    sachi89
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    Default Re: http500

    Quote Originally Posted by SurfMan View Post
    The answer is in the error message, for those who actually *read* the error message: For input string: "" myPack.SaveServlet.doGet(SaveServlet.java:38).
    In English it says: I tried to parse a String but it was empty. This happened on line 38 of your code.
    Now, go and find line 38 and find out why the parameter was empty...
    Line 38 is
    Java Code: 
     	String s4=request.getParameter("phone_number");
		int s41=Integer.parseInt(s4);
    Can u pls help me out.....
    i filled the form and while running it in eclipse the console gives,

    ss
    ss
    zz@z.com
    56464
    asdcity
    pen
    null
    22
    Done1
    Failed

    The thing is that for the payment option its a dropdown in form and im giving the value.but still null is inserted.pls help me out....
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  5. 11-20-2012, 09:40 AM #5
    Tolls
    Tolls is offline Moderator
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    Default Re: http500

    So you are no longer getting the original exception?
    You have fixed that problem then?

    For your payment mode, you have not given your options any values. They are all null.
    Read up on the option tag.

    ETA: Except, of course, it takes the value in the text...oops.
    :)
    Last edited by Tolls; 11-20-2012 at 12:29 PM. Reason: Crappy answer.
    Please do not ask for code as refusal often offends.
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  6. 11-20-2012, 12:07 PM #6
    sachi89
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    Default Re: http500

    no...it was a prob with jdbc jar file!!!now its running fine!!!thanks !!!!
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  7. 11-20-2012, 12:27 PM #7
    Tolls
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    Default Re: http500

    JDBC will have no effect on how your request data is sent.
    Please do not ask for code as refusal often offends.
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