newjframe.java

实现多标签文本编辑

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * NewJFrame.java
 *
 * Created on 2009-2-26, 10:29:51
 */
import javax.swing.JTree;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.tree.DefaultMutableTreeNode;

/**
 *
 * @author lee
 */
public class NewJFrame extends javax.swing.JFrame {
JFileChooser FileChooser=new JFileChooser();
    JTree tree;
    File file;
FileWriter filewriter;
    String FileName;
    private JTextArea[] filetextareas=new JTextArea[10];
   private  JScrollPane[] filescrollpane=new JScrollPane[10];
int TabNo=1;
int Find_control=0;
int TextAreas_control=0;
String currentText;
boolean[] newFileFlags=new boolean[10];
String[] directory=new String[10];
DefaultMutableTreeNode root;
DefaultMutableTreeNode[] nodes=new DefaultMutableTreeNode[10];
int fileChooser_control=0;
    /** Creates new form NewJFrame */
    public NewJFrame() {
        initComponents();
        for(int i=0;i<10;i++)
        {
        nodes[i]=new DefaultMutableTreeNode("File"+(i+1));
        newFileFlags[i]=true;
        filetextareas[i]=new JTextArea();
        directory[i]=new String("/");
        filescrollpane[i]=new JScrollPane(filetextareas[i],JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        }
        root=new DefaultMutableTreeNode("正在编辑的文件");
        root.add(nodes[0]);
        tree=new JTree(root);
        tree.setEditable(false);
           tabbedPane.addTab("file1", filescrollpane[0]);
           tabbedPane.addChangeListener(new Act_changeTab());
    }

    /** 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() {

        jPanel2 = new javax.swing.JPanel();
        jToolBar1 = new javax.swing.JToolBar();
        jButton1 = new javax.swing.JButton();
        jSplitPane1 = new javax.swing.JSplitPane();
        jPanel1 = new javax.swing.JPanel();
        jSplitPane2 = new javax.swing.JSplitPane();
        jPanel3 = new javax.swing.JPanel();
        tabbedPane = new javax.swing.JTabbedPane();
        jPanel4 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jSplitPane3 = new javax.swing.JSplitPane();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenuFile = new javax.swing.JMenu();
        jMenuItemNew = new javax.swing.JMenuItem();
        jMenuItemOpen = new javax.swing.JMenuItem();
        jMenuItemSave = new javax.swing.JMenuItem();
        jMenuItem3 = new javax.swing.JMenuItem();
        jMenu2 = new javax.swing.JMenu();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jToolBar1.setRollover(true);

        jButton1.setText("jButton1");
        jButton1.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED));
        jButton1.setFocusable(false);
        jButton1.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
        jButton1.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
        jToolBar1.add(jButton1);

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addComponent(jToolBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 265, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(510, Short.MAX_VALUE))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addComponent(jToolBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        getContentPane().add(jPanel2, java.awt.BorderLayout.PAGE_START);

        jSplitPane1.setDividerLocation(150);

        jSplitPane2.setDividerLocation(300);
        jSplitPane2.setOrientation(javax.swing.JSplitPane.VERTICAL_SPLIT);

        tabbedPane.setBorder(javax.swing.BorderFactory.createTitledBorder("editting area"));

        javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
        jPanel3.setLayout(jPanel3Layout);
        jPanel3Layout.setHorizontalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(tabbedPane, javax.swing.GroupLayout.DEFAULT_SIZE, 617, Short.MAX_VALUE)
        );
        jPanel3Layout.setVerticalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(tabbedPane, javax.swing.GroupLayout.DEFAULT_SIZE, 299, Short.MAX_VALUE)
        );

        jSplitPane2.setTopComponent(jPanel3);

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

        javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
        jPanel4.setLayout(jPanel4Layout);
        jPanel4Layout.setHorizontalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 617, Short.MAX_VALUE)
        );
        jPanel4Layout.setVerticalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 204, Short.MAX_VALUE)
        );

        jSplitPane2.setRightComponent(jPanel4);

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jSplitPane2, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 619, Short.MAX_VALUE)
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jSplitPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 510, Short.MAX_VALUE)
        );

        jSplitPane1.setRightComponent(jPanel1);

        jSplitPane3.setDividerLocation(100);
        jSplitPane3.setOrientation(javax.swing.JSplitPane.VERTICAL_SPLIT);
        jSplitPane3.setOneTouchExpandable(true);
        jSplitPane1.setLeftComponent(jSplitPane3);

        getContentPane().add(jSplitPane1, java.awt.BorderLayout.CENTER);

        jMenuFile.setText("File");
        jMenuFile.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuFileActionPerformed(evt);
            }
        });

        jMenuItemNew.setText("New");
        jMenuItemNew.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItemNewActionPerformed(evt);
            }
        });
        jMenuFile.add(jMenuItemNew);

        jMenuItemOpen.setText("Open");
        jMenuItemOpen.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItemOpenActionPerformed(evt);
            }
        });
        jMenuFile.add(jMenuItemOpen);

        jMenuItemSave.setText("Save");
        jMenuItemSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItemSaveActionPerformed(evt);
            }
        });
        jMenuFile.add(jMenuItemSave);

        jMenuItem3.setText("Exit");
        jMenuFile.add(jMenuItem3);

        jMenuBar1.add(jMenuFile);

        jMenu2.setText("Edit");
        jMenuBar1.add(jMenu2);

        setJMenuBar(jMenuBar1);

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jMenuItemNewActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItemNewActionPerformed
        // TODO add your handling code here:
        root.add(nodes[TabNo]);
        remove(tree);
        tree=new JTree(root);
        tabbedPane.addTab("file"+(TabNo+1), filescrollpane[TabNo]);
        tabbedPane.setSelectedIndex(TabNo);
        TextAreas_control=TabNo;
        TabNo++;
    }//GEN-LAST:event_jMenuItemNewActionPerformed

    private void jMenuFileActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuFileActionPerformed
        // TODO add your handling code here:
}//GEN-LAST:event_jMenuFileActionPerformed

    private void jMenuItemOpenActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItemOpenActionPerformed
        // TODO add your handling code here:

        FileChooser.showOpenDialog(this);
        file=FileChooser.getSelectedFile();
        if(file==null) {
            JOptionPane.showMessageDialog(this, "未选择文件","提示",JOptionPane.INFORMATION_MESSAGE);
            return;
        }

        FileName=FileChooser.getSelectedFile().getName();
        directory[TextAreas_control]=FileChooser.getCurrentDirectory().toString();
        filetextareas[TextAreas_control].setText(null);
        try{
            String str;
            BufferedReader reader=new BufferedReader(new FileReader(directory[TextAreas_control]+"/"+FileName));
            while(true){
                str=reader.readLine();
                if(str==null)break;
                filetextareas[TextAreas_control].append(str+"\n");}
        }catch(IOException e ) {
            e.printStackTrace();}
    }//GEN-LAST:event_jMenuItemOpenActionPerformed

    private void jMenuItemSaveActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jMenuItemSaveActionPerformed
        // TODO add your handling code here:
     /*    int saved=FileChooser.showSaveDialog(this);
        if(saved==JFileChooser.CANCEL_OPTION){
            JOptionPane.showMessageDialog(this,"取消保存","提示", JOptionPane.INFORMATION_MESSAGE);
            return;}
        else FileName=FileChooser.getSelectedFile().toString();
         
         directory[TextAreas_control]=FileChooser.getCurrentDirectory().toString();
         try{
       filewriter=new FileWriter(directory[TextAreas_control]+"/"+FileName);
     filewriter.write(filetextareas[TextAreas_control].getText());
      filewriter.close();
         }catch(Exception ie)
         {ie.printStackTrace();JOptionPane.showMessageDialog(this,"保存失败","提示", JOptionPane.INFORMATION_MESSAGE);
         }*/
         JFileChooser chooser=new JFileChooser();
     if(chooser.showSaveDialog(this)!=JFileChooser.APPROVE_OPTION)return;
     File file1=chooser.getSelectedFile();
     if(file1==null)return;
     FileWriter writer=null;
        try{
        writer=new FileWriter(file1);
        this.filetextareas[TextAreas_control].write(writer);
        }
        catch(IOException ex)
        {JOptionPane.showMessageDialog(this,"", "",JOptionPane.ERROR_MESSAGE);}
     finally{
     if(writer!=null)
         try{
         writer.close();
         }catch(IOException ex){}
     }

    }//GEN-LAST:event_jMenuItemSaveActionPerformed

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenu jMenuFile;
    private javax.swing.JMenuItem jMenuItem3;
    private javax.swing.JMenuItem jMenuItemNew;
    private javax.swing.JMenuItem jMenuItemOpen;
    private javax.swing.JMenuItem jMenuItemSave;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JPanel jPanel4;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JSplitPane jSplitPane1;
    private javax.swing.JSplitPane jSplitPane2;
    private javax.swing.JSplitPane jSplitPane3;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JToolBar jToolBar1;
    private javax.swing.JTabbedPane tabbedPane;
    // End of variables declaration//GEN-END:variables

class Act_changeTab implements ChangeListener
{

        public void stateChanged(ChangeEvent e) {
          TextAreas_control=tabbedPane.getSelectedIndex();
   }}

}