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Crud.java
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Crud.java
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import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.*;
public class Crud {
public Crud(){
Gui();
}
private void Gui(){
JFrame frame= new JFrame("Crud");
JButton delete=new JButton("Delete");
JButton save=new JButton("Save");
JButton update=new JButton("Update");
JButton read=new JButton("read");
JTextField name=new JTextField();
JTextField salary=new JTextField();
JTextField role=new JTextField();
name.setBounds(10,10,200,30);
salary.setBounds(10,60,200,30);
role.setBounds(10,120,200,30);
save.setBounds(10,180,100,30);
delete.setBounds(120,180,100,30);
update.setBounds(10,230,100,30);
read.setBounds(120,230,100,30);
JPanel panel=new JPanel(null);
panel.add(name);
panel.add(salary);
panel.add(role);
panel.add(delete);
panel.add(save);
panel.add(update);
panel.add(read);
save.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String nam=name.getText();
String sal=salary.getText();
String rol=role.getText();
insert(nam,sal,rol);
}
});
update.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String nam=name.getText();
String sal=salary.getText();
String rol=role.getText();
update(nam,sal,rol);
}
});
delete.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String nam=name.getText();
delete(nam);
}
});
read.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
read();
}
});
frame.add(panel);
frame.setSize(800,500);
frame.setVisible(true);
}
public void insert(String name,String salary,String role){
try{
Class.forName("com.mysql.cj.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/empcrud","root","");
PreparedStatement ps=con.prepareStatement("insert into emp_data (name,salary,role) values(?,?,?)");
ps.setString(1,name);
ps.setString(2,salary);
ps.setString(3,role);
ps.executeUpdate();
}
catch(Exception e){
System.out.println(e);
}
}
public void read(){
try{
Class.forName("com.mysql.cj.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/empcrud","root","");
Statement st=con.createStatement();
ResultSet rs = st.executeQuery("select * from emp_data");
while(rs.next()){
String name=rs.getString("name");
String salary=rs.getString("sal");
String role=rs.getString("role");
System.out.println(name+" "+salary+" "+role);
}
}
catch(Exception e){
System.out.println(e);
}
}
public void delete(String name){
try{
Class.forName("com.mysql.cj.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/empcrud","root","");
PreparedStatement ps=con.prepareStatement("delete from emp_data where name='"+name+"'");
ps.executeUpdate();
}
catch(Exception e){
System.out.println(e);
}
}
public void update(String name,String salary,String role){
try{
Class.forName("com.mysql.cj.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/empcrud","root","");
PreparedStatement ps=con.prepareStatement("update emp_data set salary=?,role=? where name='"+name+"'");
ps.setString(2,role);
ps.setString(1,salary);
ps.executeUpdate();
}
catch(Exception e){
System.out.println(e);
}
}
public static void main(String[] args){
new Crud();}
}