package com.jiemian;
import java.
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import
import
import
import
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
public class Jilu extends JFrame implements ActionListener{
JTextArea f;
JButton r1,r2,r3;
//private Component frame;
public Jilu(){
JFrame j=new JFrame();
j.setLayout(null);
f =new JTextArea();
r1 = new JButton("导出文件");
r2 = new JButton("清除");
r3 = new JButton("退出");
j.add(f);
f.setBounds(20, 30, 280, 120);
j.add(r1);
r1.setBounds(20, 160, 90, 30);
j.add(r2);
r2.setBounds(170, 160, 60, 30);
j.add(r3);
r3.setBounds(240, 160, 60, 30);
r1.addActionListener(this);
r2.addActionListener(this);
r3.addActionListener(this);
j.setTitle("聊天记录");
j.setSize(330, 250);
j.setVisible(true);
j.setLocationRelativeTo(null);
j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
j.setResizable(false);
}
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
Object o=e.getSource();
if(o==r1){
try {
String encoding="GBK";
File file=new File("e:\\java","abc.txt");
if(file.isFile() && file.exists()){
InputStreamReader read = new InputStreamReader(
new FileInputStream(file),encoding);
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while((lineTxt = bufferedReader.readLine()) != null){
System.out.println(lineTxt);
}
read.close();
}else{
JOptionPane.showMessageDialog(null, "找不到指定的文件", "错误", JOptionPane.ERROR_MESSAGE);
// System.out.println("找不到指定的文件");
}
} catch (Exception e1) {
JOptionPane.showMessageDialog(null, "读取文件错误", "错误", JOptionPane.ERROR_MESSAGE);
e1.printStackTrace();
}
//File f1=new File( "e:\\java","abc.txt");
///System.out.println("");
}
if(o==r2){
/* JOptionPane.showConfirmDialog(null,
"choose one", "choose one", JOptionPane.YES_NO_OPTION);
if(selectedValue == null){
}*/
Object[] options = { "确认", "取消" };
JOptionPane.showOptionDialog(null, "确认要清除所有聊天记录？", "Warning",
JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,
null, options, options[0]); /**/
/*JOptionPane.showInternalConfirmDialog(frame,
"please choose one", "information",
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.INFORMATION_MESSAGE); */
{
File f1=new File("e:/java/abc.txt");
f1.delete();
}
// else
//{System.exit(0); }
}
if(o==r3){
System.exit(0);
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
new Jilu();
}
}