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.
View RepliesWhy we need to use ServletContext attribute when we already have ServletContext parameters.Whats the difference between ServletContext Attributes and ServletContext parameters.
View Replies View RelatedI want to store the selected value from drop down list to mysql database...what should I do?
I have written the following code
<%@ page import="java.sql.*" %>
<%ResultSet resultset =null;%>
<HTML>
<HEAD>
<TITLE>Assessment Questionnaire</TITLE>
</HEAD>
<%
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/city?user=root&password=");
[code]....
what should i do to store the value selected from dropdown list...I have multiple dropdown list on a single page..
I am trying to develop a new web application which takes in data from a form and stores data in a database.I have included all the three files join.jsp(the form which takes in data),reg.java(servlet) and JavaConncetDb(method which connects db and servlet). I get a 404 error when i try load the web application.
My file structure in eclipse
The error I am getting
join.jsp
<%@ 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] .....
I want to create few forms in our project. I searched in web, All are PHP form Generator only not for any JSP. I could see one JSP form Generator Site. But the Content will store it in their Server. How to create Feedback form in JSP which will store the Data in Database directly.
View Replies View RelatedHow does the init() method in servlets have access to the servletContext . in its signature i can only see public void init(ServletConfig config) and init () . then how does it access servlet context .
View Replies View RelatedHow we can get the list of records from database my sql using jsp pages and servlets so that it show results on webpage.
View Replies View RelatedI am trying to display a list fetched from DB in a JSP.
My servlet mapping is:
<servlet>
<description></description>
<display-name>DocumentsServlet</display-name>
<servlet-name>DocumentsServlet</servlet-name>
<servlet-class>com.xyz.servlet.DocumentsServlet</servlet-class>
[Code] ...
The code in the servlet is:
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<Doc> docs = null;
Connection con = null;
[Code] ....
The code in JSP is:
<%
List<WWDoc> completedDocsList = (List)request.getAttribute("completedDocs");
System.out.println("In JSP == "+completedDocsList.size());
%>
The request is not coming back to the JSP page.
If I change the servlet and have "request.getRequestDispatcher("/pages/ViewCompletedWWDocs.jsp").forward(request, response);" un commented, I get exception "java.lang.IllegalStateException: Cannot forward a response that is already committed".
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
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]...
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]....
I'am new to java, this question may have been asked earlier but I'm not getting the exact answer.I want to add data from database into at and display it through jsp. But empty or null values is shown i.e no data is being displayed and when I execute the same sql query which is used in code in sql server then required output is displayed. My java code is:
Java Code:
public List < Alarm_Bean > get_Count(String system_Name)
{
if (system_Name.equals("MPS"))
{
try {
con = getConnection();
stmt = con.createStatement();
[Code]...
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]...
I have a HTML table whose rows are getting generated through javascript function. I want to save this data in the table rows.
**HTML Code**
<div style="width:100%;height:100%;border:1px solid black; overflow-x:scroll; overflow-y:scroll; padding:0">
<table border=0>
<tr>
<td>
<input type="button" name="add_details" id="add_details" value="Add" onclick="AddDetails()">
<input type="button" name="delete_details" id="delete_details" value="Delete" onclick="DeleteDetails()">
[Code] .....
When i press submit button in my form of JSP, how can i access table data?
I want to retrieve the data from this table given below and insert that data in the database in the next servlet
package com.sk;
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;
[Code] .....
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.
I am new to java. is there any possibility to store parse tree in database such as mqsql, oracle, etc. My requirement is [URL] ..... I found some code about generating parse tree. my next step is store that tree in database.
View Replies View RelatedI have a image package consisting of images and they are displayed in a jlabel.I used the code below for that
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
Image im=new ImageIcon(this.getClass()
.getResource("/images/" + imageNames[index])).getImage();
ImageIcon iconLogo = new ImageIcon(im);
jLabel5.setIcon(iconLogo);
}
Now I want to store the image displayed in the jlabel into the database(oracle).From the above code I dont know how to get the absolute path of the images.
Am doing a JSP project for maintaining the details of the interview candidates so now I want to know "How to read the contents of the resume and store in the database"
View Replies View RelatedWrite java codes for the following LinkedList base program:
The program should have following three classes:
Node.java , Polynomial.java, Project1.java
A one-variable polynomial of degree n is an arithmetic expression of the form:
a0+a1 x+a2 x^2+..........+an x^n
where a0 a1,a2, ......, an are the coefficients. Design and implement a class named Polynomial that uses a singly-linked list to store the coefficients (so there is virtually no limit on n ). Include a method that adds two polynomials and another method that multiplies two polynomials. For example, the following two polynomials
2 + x^2 - 3x^3 and 1 - x - 2x^2 + 3x^3
are represented by 2, 0, 1, -3 and 1, -1, -2, 3, respectively. The sum of these two polynomials is
3 - x - x^2
which is represented by 3, -1, -1; and the product of the two polynomials is
2 - 2x - 3x^2 + 2x^3 + x^4 + 9x^5 - 9x^6
which is represented by 2, -2, -3, 2, 1, 9, -9.
Note that you must write your code to maintain and manipulate the linked list data structure (i. e., do not use a utility library such as java.util.LinkedList). Email one week before the due date to get a data file to test your program. The data file will contain several pairs of polynomials. Each polynomial is given on a separate line (with coefficients separated by space instead of comma), and there is an empty line between two pairs. Your Java program should read and echo each pair of polynomials, compute and report their sum and product, and go on to process the next pair until the end of input. Specifically, the main method must look like:
while (not end of input) {
read and echo a pair of polynomials P1 and P2;
output sum (P1, P2); // Static method returning a polynomial
output product (P1, P2) // Static method returning a polynomial
}
Hand in a program listing with clear internal documentation and a printout of the results of execution using the test data file. Also email all JAVA program files (Node.java - the same as the one given in class except for the element field that becomes int type for this project, Polynoial.java, Project1.java) so your work can be easily recompiled and tested.
Data file will be like: coefficients of polynomials, not exact, just for as an example of
(The data file will contain several pairs of polynomials)
2 3 0 1 -3
1 -1 -2 3, 9
Output will be in same format with sum and product: coefficients of polynomials, not real, just for as an example.
5 -6 0 7 4
4 -2 -3 3, 7
sum: ...
product:...
...........
I want to store an image/file into oracle database using jsp.
I have written code to store data when am running in my machine it is working fine, but not working in server throwing an error saying that "The system cannot find the file specified."
I am attaching the code what am written.
I have some class called sorted to sort the linked list through the nodes of the list. and other class to test this ability, i made object of the sort class called "list1" and insert the values to the linked list.
If i make other object called "list2" and want to merge those two lists by using method merge in sort class. And wrote code of
list1.merge(list2);
How can the merge method in sort class know the values of list1 that called it as this object is created in other class.
I am new to Java programming and how to store data in Java.....Here is a example:Unique number, description, qty in box, price...There are thousands of these in my list. What would be the best way to store them.
View Replies View RelatedI am trying to use three cookies in a servlet to store the background and foreground color and text size but my code is not working for some reason. When I run the servlet I get an IndexOutOfBounds exception and in my code is says my cookies are not ever used, when they should be to store the variables?
package httpServlets;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
[code]....
Write a java program to store employee information in a linked list, the program should implement the following functions:
The program should display the list of functions, and ask the user to enter the number of function that he/she wants to do, then perform the function as it is required in the previous table.
import java.util.*;
public class Employee {
Scanner in = new Scanner(System.in);
String Name;
String Address;
String Department;
int ID;
int Salary;
[code]....
this is my out put
Please choose a number:
1-Add a new employee
2-Update employee's info
3-Remove employee's info
4-Exit
1
Enter name:
Enter address:
2
Enter department:
3
Enter ID:
4
Enter salary:
now:
1- why are not my adding coming out in the output only the Enter name & Enter address ??
2- how can I add names and ID's and information to test that program
I have a java query like this
query ="Select major_career.Major_Title, career.ISCOTitle,career.FS.... " //only partial,
// I swear the query is correct
resultSet = statement.executeQuery(query); //this executes it
relArr = new ArrayList<String>(); //don't worry it is intialized
In the code below I tried to store the resultset components into the arraylist
int j = 1;
while (resultSet.next()) {
while(j<=numberOfColumns){
relArr.add(resultSet.getObject(j).toString());
j++;
}
} // end while
I am not sure whether the arraylist is able to store the result set because when i try to display it like show below it only shows some rows and only the first column
Iterator it = relArr.iterator();
while (it.hasNext())
{
System.out.println(it.next());
I want to manipulate the resultset results in my program by copying the resultset values to other datastructures.