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neo
java
2 Answer(s)      3 years and 11 months ago
Posted in : Java Beginners


Hi friends yesterday i asked you this...How do i write a program that has maybe 5 labels and 5 textboxes for student details, name, surname, id no., address, cell no., student no.. Then when the user inputs data it is stored in the database. Access or excell. Your answer really helped, but i need the program to write to a file or directory. I have an example of your code mixed with mine and it does not work. Pls help, im begging you friends. Here is the example code:

package studentDetailsDatabase;

import java.awt.*;
import java.sql.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.File;
import java.io.PrintWriter;

class FormDemo extends JFrame {
public static File dir;
public static File fileName;

JButton ADD;
JPanel panel;
JFrame f;

FormDemo(){
JLabel label1,label2,label3,label4,label5;
final JTextField text1,text2,text3,text4,text5;
label1 = new JLabel("Student ID:");
text1 = new JTextField(20);

label2 = new JLabel("First Name:");
text2 = new JTextField(20);

label3 = new JLabel("Last Name:");
text3= new JTextField(20);

label4 = new JLabel("Address:");
text4 = new JTextField(20);

label5= new JLabel("Contact No:");
text5= new JTextField(20);

ADD=new JButton("Enter");
ADD.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String v1=text1.getText();
String v2=text2.getText();
String v3=text3.getText();
String v4=text4.getText();
String v5=text5.getText();
int ide=Integer.parseInt(v1);
int no=Integer.parseInt(v5);

try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection connect =DriverManager.getConnection("jdbc:odbc:access","","");
Statement st=connect.createStatement();
int i=st.executeUpdate("insert into Student(id,FirstName,LastName,Address,ContactNo) values("+ide+",'"+v2+"','"+v3+"','"+v4+"',"+v5+")");
JOptionPane.showMessageDialog(null,"Inserted Successfully");
}
catch(Exception ex){
System.out.println(ex);
JOptionPane.showMessageDialog(null,"Error");
}

}
});
f=new JFrame();
panel=new JPanel(new GridLayout(6,2));
panel.add(label1);
panel.add(text1);
panel.add(label2);
panel.add(text2);
panel.add(label3);
panel.add(text3);
panel.add(label4);
panel.add(text4);
panel.add(label5);
panel.add(text5);
panel.add(ADD);
f.add(panel,BorderLayout.CENTER);
f.setTitle("STUDENT DETAILS");
f.setVisible(true);
f.pack();
}
public static void main(String[]args){
FormDemo ff=new FormDemo();
StringBuffer sb = new StringBuffer();
String detailLine1, detailLine2;
PrintWriter pw;

try {
//2. Point to the directory where the file is located
File dir = new File("dir");
System.out.println(dir.isDirectory());

//3. Point to the file
File fileName = new File(dir,"StudentDetails.csv");
System.out.println(fileName.isFile());

text1 = ("");
text2 = ("");

sb.append("Student List for the year ");
sb.append("\n\n\n");
sb.append(text1);
sb.append("\n");
sb.append(detailLine2);
sb.append("text2");


pw = new PrintWriter(fileName);
pw.write(sb.toString());

//8. Ensure that the last data is written and close the PrintWriter
pw.flush();
pw.close();

} catch (Exception e) {
System.out.println("*******THE ERROR THAT WE GET "+ e.getMessage());
e.printStackTrace();
}
}
}

Thank you for responding.

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View Answers

September 28, 2010 at 10:56 AM


Hi Friend,

Try the following code:

import java.io.*;
import java.awt.*;
import java.sql.*;
import javax.swing.*;
import java.awt.event.*;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFCell;

class FormDemo extends JFrame {
HSSFWorkbook wb;
HSSFSheet sheet;
JButton ADD;
JPanel panel;
JFrame f;

FormDemo(){
JLabel label1,label2,label3,label4,label5;
final JTextField text1,text2,text3,text4,text5;
label1 = new JLabel("Student ID:");
text1 = new JTextField(20);

label2 = new JLabel("First Name:");
text2 = new JTextField(20);

label3 = new JLabel("Last Name:");
text3= new JTextField(20);

label4 = new JLabel("Address:");
text4 = new JTextField(20);

label5= new JLabel("Contact No:");
text5= new JTextField(20);
wb = new HSSFWorkbook();
sheet = wb.createSheet("Excel Sheet");
HSSFRow rowhead = sheet.createRow((short)0);
rowhead.createCell((short) 0).setCellValue("ID");
rowhead.createCell((short) 1).setCellValue("First Name");
rowhead.createCell((short) 2).setCellValue("Last Name");
rowhead.createCell((short) 3).setCellValue("Address");
rowhead.createCell((short) 4).setCellValue("Contact No");

ADD=new JButton("Enter");
ADD.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String v1=text1.getText();
String v2=text2.getText();
String v3=text3.getText();
String v4=text4.getText();
String v5=text5.getText();
int ide=Integer.parseInt(v1);
int no=Integer.parseInt(v5);


September 28, 2010 at 10:57 AM


continue..

try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection connect =DriverManager.getConnection("jdbc:odbc:access","","");
Statement st=connect.createStatement();
int i=st.executeUpdate("insert into Student(id,FirstName,LastName,Address,ContactNo) values("+ide+",'"+v2+"','"+v3+"','"+v4+"',"+v5+")");
JOptionPane.showMessageDialog(null,"Inserted Successfully");

ResultSet rs=st.executeQuery("select * from student");
int index=1;
while(rs.next()){
HSSFRow row = sheet.createRow((short)index);
row.createCell((short)0).setCellValue(rs.getInt(1));
row.createCell((short)1).setCellValue(rs.getString(2));
row.createCell((short)2).setCellValue(rs.getString(3));
row.createCell((short)3).setCellValue(rs.getString(4));
row.createCell((short)4).setCellValue(rs.getInt(5));
index++;
}
FileOutputStream fileOut = new FileOutputStream("c:/student.xls");
wb.write(fileOut);
fileOut.close();
}
catch(Exception ex){
System.out.println(ex);
JOptionPane.showMessageDialog(null,"Error");
}
}
});
f=new JFrame();
panel=new JPanel(new GridLayout(6,2));
panel.add(label1);
panel.add(text1);
panel.add(label2);
panel.add(text2);
panel.add(label3);
panel.add(text3);
panel.add(label4);
panel.add(text4);
panel.add(label5);
panel.add(text5);
panel.add(ADD);
f.add(panel,BorderLayout.CENTER);
f.setTitle("STUDENT DETAILS");
f.setVisible(true);
f.pack();
}
public static void main(String[]args){
FormDemo ff=new FormDemo();
}
}

Thanks


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