JSP :: How To Delete And Insert Data Into Two Different Tables
Jun 2, 2014
I am creating a portal using JSP and MySQL with eclipse IDE. I have a scenario where data is stored on draft table and is retrieved then stored on another table. I need the entry in the draft table to be deleted after the insertion. When I tried to run the code it redirects to success page but makes no impact on database(neither inserts not gets deleted).
<%@ page import="java.sql.*" %>
<%@ page import = "java.util.Date,java.text.SimpleDateFormat,java.text.ParseException"%>
<html>
<head>
<title>JSP Processing</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
[code]....
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Nov 8, 2013
I have 2 tables on 1 database
Table A, Table B
I need to evaluate a query by joining these 2 tables and then update the results in the 3rd table in another database. I need to use stateless session bean using JPA I believe. I need 3 Entities for each of the tables here.
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Dec 23, 2014
I am trying to retrieve data from my database by joining my tables. So far i have managed to join my four tables in my database and retrieve all the information in that table. Now what i want to do is create a prepared statement in java that allows me to retreive certain data. Here is my joining query.
SELECT student.idNumber,student.names, student.surname,
course.description,
coursemarks.mark,
class.form,class.id
FROM `student`
LEFT JOIN `coursemarks` on student.idNumber = coursemarks.studentid
LEFT JOIN `course` on course.courseid = coursemarks.courseid
LEFT JOIN `class`on student.idNumber = class.studentID;
What I want is to select all the data depending on the class passed and the form passed, e.g a person might decide to select a certain form only or a certain form and class
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Nov 6, 2014
If I am refreshing JSP page the old data is remaining as it is with new data.what can be done to remove previous data from that JSP?
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Jun 19, 2014
I got a question , which collection framework class will delete data if we call "get".
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May 22, 2014
How to modify and delete data from a array list in net-beans?
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Jan 22, 2014
Problem code:
JSP 1:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@page import="java.sql.*;" %>
<%!Connection con;%>
<%!Statement stmt = null;%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "[URL]...">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
[Code]...
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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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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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Mar 29, 2014
I need my java program to insert data into my access database. I get no errors in my code, but it never inserts, deletes the data in my database. Here is my code:
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
public class INS extends Frame implements ActionListener{
Frame f;
Label l1, l2;
TextField t1, t2;
Button b1, b2, b3, b4, b5;
Connection c;
[Code] ....
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Oct 10, 2014
I have tried this code to insert into datbase if not exists but i get an Exception in thread "main" com.mysql.jdbc. exceptions.jdbc4. MySQL SyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE NOT EXISTS (SELECT teamName FROM Teams WHERE teamName = teamName) LIMIT 1' at line 1
stmt.executeUpdate("INSERT INTO Teams(teamId,teamName,league) VALUES ("+i+",'"+loser+"','"+league2+"')WHERE NOT EXISTS (SELECT teamId,teamName,league FROM Teams WHERE teamName = teamName) LIMIT 1;");
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May 2, 2014
I need getting detailed examples about how I can read/insert into database using JSF code for its different components. I am a beginner in JSF and I have the basics, however, I need the best source which it has useful, easy and detailed steps to understand the techniques for connecting to the DB and how to insert or read data from the database.
I tried to search, but I found the lessons are not useful or not described in details.
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Feb 11, 2015
I'm new to java and trying to insert data from a cachedrowset into MS Access database, Below is the error code that I get after running my program.
java.sql.SQLException: Parameter-Set has missing values.
The SQL test table that I am using.
Java Code:
create table book (
TITLE_ID CHAR(3 BYTE)
TITLE_NAME VARCHAR2(40 BYTE)
TYPE VARCHAR2(10 BYTE)
PUB_ID CHAR(3 BYTE)
PAGES NUMBER(38,0)
PRICE NUMBER(5,2)
SALES NUMBER(38,0)
PUBDATE DATE
CONTRACT NUMBER(38,0)
); mh_sh_highlight_all('java');
SQL table values with blanks:
Java Code: TITLE_ID TITLE_NAME TYPE PUB_ID PAGES PRICE SALES PUBDATE CONTRACT
T01Java history P0111121.99 566 01-AUG-001
T02Oracle history P0311419.95 9566 01-APR-981
T03SQL computer P0212239.95 25667 01-SEP-001
T04C++ psychologyP0451112.99 13001 31-MAY-991
T05Python psychologyP041016.95 201440 01-JAN-011
[code]....
Below is the piece of java code that I am using.
Java Code:
public void insertAccessTable(Connection connection, CachedRowSet CRS_insertAccess) throws Exception
{
try
{
RowSetMetaData metaData = (RowSetMetaData)CRS_insertAccess.getMetaData();
ArrayList<ArrayList<String>> TwoDimArrList = new ArrayList<ArrayList<String>>();
TwoDimArrList.add(new ArrayList<String>());
TwoDimArrList.add(new ArrayList<String>());
ArrayList<String> ColArrList = new ArrayList<String>();
for (int column = 1; column <= metaData.getColumnCount(); column++) {
[code]....
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Oct 27, 2014
I want to create an application wich can handle xml files ( display xml files's data on a html page) + insert those data into an oracle database.
I'm new to that, it a project for my internship. wich API is the most appropriate for that ( Jdom or Xstream or other), wich framework i can use ( there is only 3 IHM : connexion, upload file, display data, confirmation insertion data)?
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Apr 1, 2015
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] .....
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May 12, 2015
I'm trying to use in the constructor inserts from keyboard and then check whether any of the constructors fields remained empty. Let say my constructor is:
public SomeClass(String a, String b, String c)throws SomeClassException{
if (a == null || b == null || c == null) {throw new SomeClassException("Some message"); // here is the empty test
} //...
Thus I prepared method: insertConstruct() as follows:
public static String insertConstruct(){
String lettering = null;
Scanner sc = new Scanner(System.in);
lettering= sc.nextLine();
return lettering;
}
And during creating the new object in some main method I call:
// ...
ClassName obj1;
obj1 = new ClassName(insertConstruct(),insertConstruct(),insertConstruct());
//...
The problem is not with inserting data but with leaving the field empty. When I pass any field just with keyboards Enter, the empty test doesnt return me any message about it. While it works if I build object with the constructor like:
// ...
className obj1;
obj1 = new ClassName("word a",null,"word c");
//...
What might case this failure?
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May 8, 2014
How can insert value into sql server column of data type 'datetime' with jdbc the methods in java.sql are 'setdate()' and 'setTime()'
How can I do this. I'm using java.time.LocalDateTime.
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Oct 12, 2013
I need to process 10000 xml files and verify and insert the data into database. I am loading all the files in the file object and iterating one by one. I am getting the memory issue. How to handle this?
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Mar 22, 2015
We started learning about tables and have a little program. The teacher gave us an excercise and doesn't works (not running), I receive too many errors. So any simple java program with tables with 20 numbers, that is giving random numbers?
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Sep 29, 2014
Using HQL I am fetching the rows , now i need to iterate through the list and convert each row in the list to a "string" and append the string to a buffer.... How to do it
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Apr 13, 2014
I am writing a class which formats console output as a table. It displays the type of an entry, the name of an entry, and the data for an entry. I am stuck on a required for loop which appends a tab character to a string, for formatting it as a table. It doesn't seem to be adding any of the tabs and I can't tell what I've done wrong. As far as I can tell the contents of the loop are never reached, and I can't make sense of it.
The ConsoleWriter class that contains the code that is in error...
Java Code:
package frontend;
public class ConsoleWriter {
private static String tabbedData(String data, int min) {
System.out.println(); //for debug
int tabcount = 0;
int len=8*min;
[code]....
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Jun 1, 2014
I've been using a Java applet for sports tables.It has been very useful for me. However, the recent developments from the people at Oracle have made this program impossible to use. The point is that I need this program and I need it fast.I've been in touch with the person who once created this applet and he has no intentions at all to upgrade it or do anything to make it function. How to make the program works with their new updates.
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Feb 10, 2014
I am trying to use this program for reference but its not working ...
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Nov 19, 2014
Doesn't matter now, I solved it but I don't know how to delete a thread...
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Dec 7, 2014
I've this "program" that shall manage to register a dog, show a list of all registerd dogs and delete dogs from the list.. And I'm stuck at the latter one. So I've to classes, one for the dog and one for register/program. This is my main program
package hundRegister;
import java.util.Scanner;
import java.util.ArrayList;
public class HundProgram {
private static Scanner tangentbord = new Scanner (System.in);
private static ArrayList<Hund> hundlista = new ArrayList<>();
[Code] ......
So, when I enter a name on a dog that exist on my list, it just jumps down to } else { and write that dog can't be found even if I write the exact name on the dog.
I can't see what I'm doing wrong, been trying out different methods now.
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Jan 28, 2014
how to delete the files from ftp location
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