package io;

 import java.io.*;

 import java.awt.*;

 import java.awt.event.ActionEvent;

 import java.awt.event.ActionListener;

 import javax.swing.*;

 public class text extends JFrame implements ActionListener{

 /**

 * @param args

 */

 //需要的组件

 //文本框

 JTextArea jta1=null;

 //菜单条

 JMenuBar jmb1=null;

 //菜单

 JMenu jm1=null;

 //菜单项

 JMenuItem jmi1=null;

 JMenuItem jmi2=null;

 JScrollPane jsp1=null;

 public static void main(String[] args) {

 // TODO Auto-generated method stub

 text  show=new text();

 }

 public text()

 {

 //文本框

 jta1 =new JTextArea();

 //菜单条

 jmb1=new JMenuBar();

 //菜单

 jm1=new JMenu("文件(0)");

 //助记符

 jm1.setMnemonic('F');

 //菜单项

 jmi1=new JMenuItem("打开",new ImageIcon("src/10.gif"));

 //注册监听

 jmi1.addActionListener(this);

 jmi1.setActionCommand("open");

 jmi2=new JMenuItem("保存",new ImageIcon("src/9.gif"));

 //注册监听

 jmi2.addActionListener(this);

 jmi2.setActionCommand("save");

 this.setJMenuBar(jmb1);

 jmb1.add(jm1);

 jm1.add(jmi1);

 jm1.add(jmi2);

 jsp1=new JScrollPane(jta1);

 this.add(jsp1);

 this.setTitle("记事本");

 this.setSize(400, 300);

 this.setLocation(100, 100);

 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 this.setVisible(true);

 }

 @Override

 public void actionPerformed(ActionEvent arg0) {

 // TODO Auto-generated method stub

 //判断

 if(arg0.getActionCommand().equals("open"))

 {

 //文件选择组件

 JFileChooser jfc1=new JFileChooser();

 //设置名字

 jfc1.setDialogTitle("请选择文件…");

 //设置组件.null表示默认方式

 jfc1.showOpenDialog(null);

 jfc1.setVisible(true);

 //得到用户选择的文件路径

 String filename1=jfc1.getSelectedFile().getAbsolutePath();

 //读取

 FileReader fr1=null;

 BufferedReader br1=null;

 try {

 fr1=new FileReader(filename1);

 br1=new BufferedReader(fr1);

 //读取信息，显示到文本框jta1

 String s="";

 String all="";

 while((s=br1.readLine())!=null)

 {

 all+=s+"\r\n";

 //jta1.setText(s+"\r\n");

 }

 jta1.setText(all);

 } catch (FileNotFoundException e) {

 // TODO Auto-generated catch block

 e.printStackTrace();

 } catch (IOException e) {

 // TODO Auto-generated catch block

 e.printStackTrace();

 }

 finally{

 try {

 fr1.close();

 } catch (IOException e) {

 // TODO Auto-generated catch block

 e.printStackTrace();

 }

 try {

 br1.close();

 } catch (IOException e) {

 // TODO Auto-generated catch block

 e.printStackTrace();

 }

 }

 }

 else if(arg0.getActionCommand().equals("save"))

 {

 //文件选择组件

 JFileChooser jfc1=new JFileChooser();

 //设置名字

 jfc1.setDialogTitle("保存文件…");

 //设置组件.null表示默认方式

 jfc1.showSaveDialog(null);

 jfc1.setVisible(true);

 //得到用户选择的文件路径

 //得到用户选择的文件路径

 String filename1=jfc1.getSelectedFile().getAbsolutePath();

 //写入

 FileWriter fw1=null;

 BufferedWriter bw1=null;

 try {

 fw1=new FileWriter(filename1);

 //写入信息，显示到文本框jta1

 fw1.write(this.jta1.getText());

 } catch (FileNotFoundException e) {

 // TODO Auto-generated catch block

 e.printStackTrace();

 } catch (IOException e) {

 // TODO Auto-generated catch block

 e.printStackTrace();

 }

 finally{

 try {

 fw1.close();

 } catch (IOException e) {

 // TODO Auto-generated catch block

 e.printStackTrace();

 }

 try {

 bw1.close();

 } catch (IOException e) {

 // TODO Auto-generated catch block

 e.printStackTrace();

 }

 }

 }

 }

 }