Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package javaapplication1; import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.Toolkit; import java.io.File; import java.io.FileInputStream; import java.util.Iterator; import java.util.Vector; import javax.swing.JFrame; import javax.swing.JScrollBar; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.TableColumn; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; /** * * @author Sagar Bhatt */ public class Excel extends javax.swing.JFrame { Vector dataTemp = new Vector(); public Vector data = new Vector(); Vector col = new Vector(); @Override public void validate() { super.validate(); //To change body of generated methods, choose Tools | Templates. } /** * Creates new form Excel */ public Excel() { initComponents(); } /** * 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") // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents private void initComponents() { jLabel1 = new javax.swing.JLabel(); btnImport = new javax.swing.JButton(); jLabel2 = new javax.swing.JLabel(); txtfileName = new javax.swing.JTextField(); setTitle("Import"); setResizable(false); jLabel1.setText( "Before importing data , please ensures that your excel file is in root folder of application. "); btnImport.setText("Import"); btnImport.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnImportActionPerformed(evt); } }); jLabel2.setText("Enter name of file:"); 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(21, 21, 21) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addGroup(layout.createSequentialGroup().addComponent(jLabel2) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addComponent(txtfileName)) .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(btnImport, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) .addContainerGap(18, Short.MAX_VALUE))); layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup().addGap(21, 21, 21).addComponent(jLabel1) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel2).addComponent(txtfileName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(18, 18, 18).addComponent(btnImport).addContainerGap(26, Short.MAX_VALUE))); pack(); setLocationRelativeTo(null); }// </editor-fold>//GEN-END:initComponents private void btnImportActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnImportActionPerformed // TODO add your handling code here: try { String temp; temp = txtfileName.getText() + ".xlsx"; FileInputStream file = new FileInputStream(new File(temp)); //Create Workbook instance holding reference to .xlsx file XSSFWorkbook workbook = new XSSFWorkbook(file); //Get first/desired sheet from the workbook XSSFSheet sheet = workbook.getSheetAt(0); //Iterate through each rows one by one Iterator<Row> rowIterator = sheet.iterator(); int i = 1, j = 1; while (rowIterator.hasNext()) { Row row = rowIterator.next(); //For each row, iterate through all the columns Iterator<Cell> cellIterator = row.cellIterator(); while (cellIterator.hasNext()) { Cell cell = cellIterator.next(); //Check the cell type and format accordingly dataTemp.add(cell.getNumericCellValue()); // System.out.print(dataTemp.get(0).toString()); if (j == 1) { col.add("S" + i); i++; } } j++; data.add(dataTemp); } file.close(); } catch (Exception e) { e.printStackTrace(); } printData(); }//GEN-LAST:event_btnImportActionPerformed /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.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(Excel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(Excel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(Excel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(Excel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //</editor-fold> /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { @Override public void run() { new Excel().setVisible(true); } }); } void printData() { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE); Dimension dim = Toolkit.getDefaultToolkit().getScreenSize(); frame.setLocation(dim.width / 2 - this.getSize().width / 2, dim.height / 2 - this.getSize().height / 2); //frame.set JTable table = new JTable(data, col); // //JScrollPane scrollPane = new JScrollPane(table); JScrollPane temp = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED); table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); frame.add(temp, BorderLayout.CENTER); frame.setSize(300, 150); frame.setVisible(true); } // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JButton btnImport; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JTextField txtfileName; // End of variables declaration//GEN-END:variables }