In previous posts, we have learned about types of JDBC drivers and the how to make database connection using JDBC and then how to execute SELECT Query. Let’s move forward. In this example I am picking up execution of SQL INSERT queries using JDBC.
SQL INSERT query are executed to push/store data stored in relational databases. It requires following steps:
1) Make a database connection
2) Execute the SQL INSERT Query
Pr-requisites include setting up a database schema and creating a table at least.
CREATE SCHEMA 'JDBCDemo' ; CREATE TABLE 'JDBCDemo'.'EMPLOYEE' ( 'ID' INT NOT NULL DEFAULT 0 , 'FIRST_NAME' VARCHAR(100) NOT NULL , 'LAST_NAME' VARCHAR(100) NULL , 'STAT_CD' TINYINT NOT NULL DEFAULT 0 );
Let’s write above steps in code:
1) Make a database connection
Though we have already learned about it in making JDBC connection, lets recap with this simple code snippet.
Class.forName("com.mysql.jdbc.Driver");
connection = DriverManager
.getConnection("jdbc:mysql://localhost:3306/JDBCDemo", "root", "password");
2) Execute the SQL INSERT Query
This is the main step and core part in ths post. It requires creating a Statement object and then using it’s execute() method.
Statement stmt = connection.createStatement();
stmt.execute("INSERT INTO EMPLOYEE (ID,FIRST_NAME,LAST_NAME,STAT_CD) VALUES (1,'Lokesh','Gupta',5)");
Above statement will execute an insert statement in database we are connected to.
Let’s see the whole code in working.
package com.howtodoinjava.jdbc.demo;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
public class InsertDataDemo {
public static void main(String[] args) {
Connection connection = null;
Statement stmt = null;
try
{
Class.forName("com.mysql.jdbc.Driver");
connection = DriverManager
.getConnection("jdbc:mysql://localhost:3306/JDBCDemo", "root", "password");
stmt = connection.createStatement();
stmt.execute("INSERT INTO EMPLOYEE (ID,FIRST_NAME,LAST_NAME,STAT_CD) "
+ "VALUES (1,'Lokesh','Gupta',5)");
}
catch (Exception e) {
e.printStackTrace();
}finally {
try {
stmt.close();
connection.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
That’s all in this post. Drop me a comment if something needs explanation.
Happy Leaning !!
what’s wrong with this code/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.myjava.string;
import java.sql.*;
import javax.swing.*;
/**
*
* @author Eptl Maurai
*/
public class Empdetail extends javax.swing.JFrame {
Connection connection = null;
Statement stmt = null;
/**
* Creates new form Empdetail
*/
public Empdetail() {
initComponents();
// conn=javaconnect.Empdet();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings(“unchecked”)
//
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
Empid = new javax.swing.JTextField();
jLabel5 = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
Empname = new javax.swing.JTextField();
Empcity = new javax.swing.JTextField();
jLabel2 = new javax.swing.JLabel();
Empsalary = new javax.swing.JTextField();
jLabel3 = new javax.swing.JLabel();
jScrollPane1 = new javax.swing.JScrollPane();
Empaddress = new javax.swing.JTextArea();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(null, “Employee Details”, javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font(“Agency FB”, 1, 14))); // NOI18N
Empid.setName(“”); // NOI18N
Empid.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
EmpidActionPerformed(evt);
}
});
jLabel5.setText(“Empcity”);
jLabel1.setText(“Empid”);
jLabel4.setText(“Empsalary”);
Empname.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
EmpnameActionPerformed(evt);
}
});
Empcity.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
EmpcityActionPerformed(evt);
}
});
jLabel2.setText(“Empname”);
Empsalary.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
EmpsalaryActionPerformed(evt);
}
});
jLabel3.setText(“Empadress”);
Empaddress.setColumns(20);
Empaddress.setRows(5);
jScrollPane1.setViewportView(Empaddress);
jButton1.setText(“Submit”);
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(33, 33, 33)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel3)
.addComponent(jLabel5)
.addComponent(jLabel4)
.addComponent(jLabel2)
.addComponent(jLabel1))
.addGap(129, 129, 129)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(Empid, javax.swing.GroupLayout.PREFERRED_SIZE, 90, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(Empname, javax.swing.GroupLayout.PREFERRED_SIZE, 161, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(Empsalary, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(Empcity, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(53, Short.MAX_VALUE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(182, 182, 182)
.addComponent(jButton1)
.addGap(0, 0, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(23, 23, 23)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(Empid, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel2)
.addComponent(Empname, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(31, 31, 31)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(37, 37, 37)
.addComponent(jLabel3)))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(10, 10, 10)
.addComponent(jLabel4))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(Empsalary, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 21, Short.MAX_VALUE)
.addComponent(jLabel5)
.addGap(63, 63, 63))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(Empcity, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addComponent(jButton1)
.addGap(5, 5, 5))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(67, 67, 67)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(259, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(30, 30, 30)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(36, Short.MAX_VALUE))
);
pack();
}//
private void EmpsalaryActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:;
try{
int Empsalry=Integer.parseInt(Empsalary.getText());
int Empsid=Integer.parseInt(Empid.getText());
String Empnam=Empname.getText();
String Empaddr=Empaddress.getText();
String Empcit=Empcity.getText();
Class.forName(“com.mysql.jdbc.Driver”);
connection = DriverManager
.getConnection(“jdbc:mysql://localhost:3306/empdet”, “root”, “”);
stmt = connection.createStatement();
//String str=();
stmt.execute(“INSERT INTO EMPLOYEE VALUE”);
}
catch(Exception e){
System.out.println(e.getMessage());
}
}
private void EmpcityActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void EmpnameActionPerformed(java.awt.event.ActionEvent evt) {
}
private void EmpidActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) throws ClassNotFoundException {
/* Set the Nimbus look and feel */
//
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see https://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if (“Nimbus”.equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Empdetail.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Empdetail.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Empdetail.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Empdetail.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if (“Nimbus”.equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Empdetail.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Empdetail.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Empdetail.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Empdetail.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Empdetail().setVisible(true);
}
});
}
// Variables declaration – do not modify
private javax.swing.JTextArea Empaddress;
private javax.swing.JTextField Empcity;
private javax.swing.JTextField Empid;
private javax.swing.JTextField Empname;
private javax.swing.JTextField Empsalary;
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
// End of variables declaration
}
What’s problem you are facing.. it’s long piece of code.. I will take time to go through it.
thank you
I would like to refer to you for my class 12 project in the future…
if thats Ok with you that is …
Just an addon,
Difference between execute, executeQuery and executeUpdate :
execute: Returns true if the first object that the query returns is a ResultSet object. Use this method if the query could return one or more ResultSet objects. Retrieve the ResultSet objects returned from the query by repeatedly calling Statement.getResultSet.
executeQuery: Returns one ResultSet object.
executeUpdate: Returns an integer representing the number of rows affected by the SQL statement. Use this method if you are using INSERT, DELETE, or UPDATE SQL statements.
Source : https://docs.oracle.com/javase/tutorial/jdbc/basics/processingsqlstatements.html
Thanks for adding value to this post.