Servlets :: Error In Posting Data To Sql

Sep 29, 2014

I've the below data in my HTML.

<body>
<div class="container">
<form name="main" action="Insert_Record" method="post">
<table class="bordered">
<tr>

[Code]....

I'm getting the below error.

java.text.ParseException: Unparseable date: "09-10-14"

if i use d-MM-yyy, the output is

Thu Aug 09 00:00:00 IST 14

but i want the date in output to be.

09-10-14

below is how my data base is like.

how can i get this.

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Unable To Implement Custom Request Method In HTTP Header While Posting Data To Server URL

Jun 26, 2015

I have been trying to implement custom request method in HTTP header while posting my data to the server URL. My application specific URL accepts -X parameter and -d for the data and it is mandatory for that url. Basically I am trying to dump JSON data into my influx DB using CURL command which is working fine from the shell. But the issue is, if I am implementing the same in java with proper approach, it is not supported or working. My CURL command is :

curl -X POST -d '<my_json_data>' '<my_url>'

How can I implement the same in java using HttpUrlConnection or other available approach?

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Servlets :: How Does Multipart / Form-data Send Data Over Network During File Upload

Apr 9, 2015

I would like to understand how does multipart/form-data works during file upload scenario's, Does it chunks the data from client to server while transferring the files ?

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Servlets :: Multipart Form Data - Sending Additional Data?

Feb 21, 2014

I am using apache-commons-fileupload to get file from client to the server.(using JSP and Servlet).

JSP/HTML

<form method="POST" action="GetFile" enctype="multipart/form-data">
<input type="file" name="datafile">
<input type="text" name="text1">
<input type="submit" value="Next">
</form>

Servlet: GetFile

System.out.println(request.getParameter("text1"));

I am able to upload the file to the server, but I am not able to get the value of text1 in the servlet (I am getting null value of text1 in the servlet), I need this textfield in the form to submit some additional information while uploading it to the server.

--> Is enctype="multipart/form-data" option of form doesn't allow other form data to be submited? if it doesn't allow it then what are the other options I have to send this additional textfield to the server.

--> Or is there any other problem in my code?

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Servlets :: Error Message To JSP

Jan 6, 2015

I have a servlet that adds entries to a table and when there is a duplicate it redirects to an error page and I'd like to make it display the duplicate entry id.The problem is when I try to get the parameter and show the error (the duplicate entry id) on my jsp error page it shows null instead of the appropriate number.this is my servlet:

package package_ergasia;
import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

[code]....

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Servlets :: Error / Http Status 500

Mar 9, 2014

i am using netbeans6.7.1 version i implemented one program i.e web application ..when am excuting this one i got one error http status 500...

this is the code:

SumServlet.java
package com.sum;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;

[code]....

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Servlets :: Error / HTTP Status 400

Mar 9, 2014

correct this error

WishSrv.java

package com.wish;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Calendar;
import javax.servlet.ServletException;

[code]...

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Servlets :: Inserting Data To The Table?

May 3, 2014

In my project I need to add some schedule information into a schedule table in the database..

I am accepting input from a user which direct the parameters here..

I am doing all the required stuff but yet code is not working

There must be some error in date object.

I am using mysql as backend, I have used same kind of code in jsp that is working fine but this is creating error

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.logging.Level;
import java.util.logging.Logger;

[code].....

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Servlets :: Big Form Data Passed

May 29, 2014

I have an html form with 200 input fields of type text. The first input field contains the name of a book author and the remaining 199 fields hold each a title of a book that he or she has written. I also have a servlet that processes the form data and sends it to a file. The entered data is restricted to a combination of the characters "a...z A...Z". how do i go about with creating my html page. The input fields are just too many, how to retrieve the 200 values in servlet.

<html>
<head>
<script>
var k;
function testField(Expression){
k=1;
var str1="abcdefghijklmnopqrstuvwxyz ";
var sor=Expression;

[code]....

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Servlets :: Insert Data To The Database?

Apr 4, 2014

i am stucked with a little error in servlets

this is my jsp page
form.jsp
<form action="InsertData" method="post" >
username:<input type="text" name="username">
Password :<input type="password" name="password">

[Code]....

i am getting wroor page not foung 404

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Servlets :: Data Is Not Getting Inserted Into Database

Mar 26, 2015

I am trying to insert data using servlet but it is not getting into database.

I have a two JSP's form from which i enter the data and using servelt trying to insert the data into database.

JSP page code:

1.add_question_list.jsp
<script language="JavaScript">
function validate(form) {
if (form.question.value == "") {

[code]...

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Servlets :: How To Persist Data Without HttpSession

Jul 3, 2014

I have a basic HTML calculator that asks the user to input 2 integers and select from a dropdown their desired math operation:

The servlet will process the calculation and counts how many times a certain operation has been used:

The counter for Multiplication has incremented accordingly.

HTML:
<form action = "processcalc.html" method = "post">
<table>
<tr>
<td>First Operand:</td>
<td><input type = "text" name = "firstOperand" required></td>

[Code] ....

Question: However, when I press "Go Back" and process a new computation, all counters reset to 0. Is there a way without using HttpSession to persist the counter values? (It has not been taught to us, so we are not allowed to use it yet.)

For example, going back and having below input...
First Operand: 4
Operator: +
Second Operand: 5

...will result to...
Addition: 1
Subtraction: 0
Multiplication: 1 (counter from previous computation maintained)
Division: 0

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Servlets :: Insert Data To Database?

Aug 2, 2014

How can we insert data through java servlet?

I can insert data to table by using JSP Scriptlet easily but I have a hard time with servlet.

public class UsertToDatabase() {
public boolean inserUser(String name, String email, String pwd) throws SQLException {
PreparedStatement pstmt = null;
boolean flag = false;
System.out.println("start");
openConn();
System.out.println("start_1");
if(conn == null) {

[code]....

I am positive that the above code function fine. The problem is whenever I call UserToDB() class inside the servlet, and I got this error: java.lang.ClassNotFoundException: org.postgresql.

Driver which mean that my conn (connection) is not connected to the database but I have ensure to do so by calling openConn() before start the transaction.

This is my servlet code:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("username");
String email = request.getParameter("email");
String password = request.getParameter("password");
List<String> errList = new ArrayList<String>();

[code]....

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Servlets :: Getting Data Anywhere By Storing In Session

Jul 22, 2014

I've sample code of jsp and servlets. Below is my code.

Index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="AnnotationServlet">

[code]....

Now I want to store those username and age(in .html) somewhere and I want those information in welcome.jsp. Now, I'm storing all those in session itself(In doGet method(servlet)).

2 Doubt) Also, when I get the session in servlet HttpSession session = request.getSession(); line No. 27. The session value is org. apache. catalina. session. StandardSessionFacade@69a8bf4f...I'm expecting that session is to be empty. Because, I dint store anything until that line.

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Servlets :: HTTP Error 404 Resource Not Found

Feb 20, 2014

I am trying to use hidden variable in project.When I launch my project i am able to get the welcome page.But when submit login values i am getting HTTP 404 error- Resource not found error.

`My home Page/Login Page

<body>
<form action="<%=request.getContextPath() %>/LoginServlet" method="get">
USERNAME<input type="text" name="uname"><br>
PASSWORD<input type="password" name="pass"><br>
<input type="submit" name="submit" value="submit">

My LoginServlet

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println("sandeep");
PrintWriter out=response.getWriter();
String userName=request.getParameter("uname");

[code].....

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Servlets :: Getting HTTP Status 404 Error In Tomcat

Feb 26, 2014

Below is my Servletclass code

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MyFirstServlet extends HttpServlet {

[Code] .....

I have configured tomcat7 in my ecclipse ide...

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Servlets :: How To Send Json Data From A Server

Aug 11, 2014

I'm new to json and the web. My purpose is to use json data from a server and parse it and show meaningful data to the user. I am aware of json parsing, so no sweat there. However, I would like to know how json data is sent to the front end after which it can be parsed.

Usually in my json parsing examples, I have a variable like var data = ]OR I do a getJSON on a data.json file which I have stored in the project folder. However, I want this data to come real time from a servlet. How to go about this?

So, basically my question is, how do I send real time json data from a servlet backend, say some records which I have extracted from the database using jdbc?

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Servlets :: How To Exchange Data In Different Nodes In Same Cluster

Jul 21, 2014

What is better and easier approach for exchanging data (in my case list of objects) between servlets in different nodes in same cluster? I thought about RMI or just direct url servlet call. But it seems that I'm missing something here.

My problem is the following:

I have to create some kind of diagnostic storage for each cluster member. It will collect all information and errors during application work.

And If I need to check application status I do web request and it will show me that these servers (cluster members) are okay and that node has an issue.

I'm using spring and tomcat.

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Servlets :: Send Data Over Network Using Httpsession?

Jan 9, 2015

I am learning few concepts in servlets. And i came across this doubt. We used to send data over network using httpsession as below.

HttpSession session = request.getSession();
Object obj = new Object();
session.setAttribute("object", obj);

And get the data in JSP with below code

<%= session.getAttribute("object")%>

However I am not sure whether HTTPSession is serializable or not.

How HTTPSession works?

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Servlets :: Using HTML Form To Sort Data

May 12, 2014

I have a very simple HTML form with a textField for a name, and add button to add the name to a MySQL database, and a sort button to sort the names in the database and display them. I almost have it working, however when I hit the "sort" button; I get the message that appears after a user clicks the add button along with the sorted list of names. It looks like this:

Please go back and add a name or sort.
Bill Jones
David G
Debbie Downer
Jane Doe
Joe Smith
John Doe
Mike Jones
Paul Smith
Susan Jones

What I have to change on my code to make just the list show up by itself when the user clicks sort?

My servlet code:

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.*;

[Code] .....

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Servlets :: How To Output Data From Database Into Table JSP

Mar 7, 2015

I am trying to output data but get empty table. What am I doing wrong? Here is my code:

Class Item:

package com.store.util;
public class Item {
private Long id;
private String name;
private String description;
private String category;
private Double price;

[Code]...

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Servlets :: Java Class - Session Variable Error

Dec 14, 2014

My dynamic web project has a java class that captures a session variable with the following code.

HttpSession LoginSession = request.getSession();
String VAR = LoginSession.getAttribute("myVar").toString(); //This is the row 127

If i test the app in local (Mac + Java 1.8 + Tomcat 8) all works. In my remote cloud server (Ubuntu 14.10 + Java 1.8 + Tomcat 8) all works, except this class, that has this code. I copy the complete error here. Note that the row 127 of the error message is the second row of the previous code; and, if i comment this row with // and assign a fix variable all works. So, the problem is that 127^ row.

14-Dec-2014 08:15:23.923 SEVERE [http-nio-8080-exec-14] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [srvNavigation.SrvPT] in context with path [/myapp] threw exception
java.lang.NullPointerException
at srvNavigation.SrvPT.doGet(SrvPT.java:127)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)

[Code] ....

How can i solve the problem?

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Servlets :: Unable To Resolve Class File Error

Sep 9, 2014

I am stuck with my application. I have jsp, servlet application with jasper report server. When I run the application through eclipse, everything works perfectly. But When I try to run it in Tomcat (without eclipse) it gives me the "Unable to resolve the class file " error. I tried all the solutions I got through the google, but still I am unable to come over it.

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Servlets :: Error Loading MySQL Database Table From JSP

Nov 5, 2014

I m new to programming and am working on the college project. I have MySQL 5.6.20, Eclipse Kepler and Apache Tomcat 7.0.54. I m trying to retrieve the whole table from MySQL schema into a jsp. All the possible things i can do, i have already tried, but none of them are working.

The following attachment contains the whole project. I have my sql connection code in Sample.java file, which i want to get working in Fetch.jsp on the Submit button click. But it shows the tomcat error as localhost:8080/Sample HTTP Status 404-/Sample ; type Status report; message /Sample; Description The requested resource is not available.

<%@ 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">

[Code] ....

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Servlets :: How To Get Whole List Table / Dropdown Data From HTML / JSP

Sep 4, 2014

Is it possible to get the list/ values in html/jsp from servlet?

I have a table inside an html/jsp page and when the user clicks a button I need to refresh the whole page with some additional text message.

Currently what I am doing is that I am using a java bean for the jsp page that contains a list of values inside the table then store it in session but I think there is a better way without storing it in session.

I tried using request.getParameter() but it only returns string.

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Servlets :: How To Store List Of Data Of A Database In ServletContext

Feb 5, 2014

i am newbie to servlet and m working on a project like online shopping. I have list of data items in my database and i am able to fetch and display the data from database but i want to know that how can i store these data items in ServletContext so that i can use use it frequently in other pages.

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