文件查看器（java 原码）

package com.liutao.fileInfo;import java.awt.*;import java.io.*;import javax.swing.*;import javax.swing.filechooser.FileNameExtensionFilter;import java.awt.event.*;public class FileInfo extends JFrame{private JLabel label ;private JButton button_Open;private JTextField text_Route;private TextArea text_Info;/* * 构造函数FileInfor(); */public FileInfo(){buildLayout();}public static void main(String[] args) {new FileInfo();}/* * 创建主界面buildLayout() , 返回一个容器Container */private void buildLayout(){final JFrame frame = new JFrame("文件查看小程序");Container con = getContentPane();JPanel pane = new JPanel();pane.setLayout(new FlowLayout());label = new JLabel("文件路径：" , JLabel.CENTER);button_Open = new JButton("Open...");text_Route = new JTextField(30);text_Info = new TextArea();text_Info.setEditable(false);//增加事件监听内部类button_Open.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e) {String path = getPath(); JFileChooser chooser = new JFileChooser(path);FileNameExtensionFilter filter = new FileNameExtensionFilter("txt & java ", "java", "txt");    chooser.setFileFilter(filter);int returnVal = chooser.showOpenDialog(frame);if(returnVal == JFileChooser.APPROVE_OPTION) {showRoute(chooser.getSelectedFile().getAbsolutePath());showInfo(chooser.getSelectedFile().getAbsolutePath());}else{JOptionPane.showMessageDialog(null, "您还没有选取任何文件！", "错误提示", JOptionPane.WARNING_MESSAGE); }setPath(chooser.getSelectedFile().getPath());}});pane.add(label);pane.add(text_Route);pane.add(button_Open);con.add(pane , BorderLayout.NORTH);con.add(text_Info , BorderLayout.CENTER);frame.setContentPane(con);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setBounds(350, 150, 500, 400);frame.setVisible(true);frame.setResizable(false);}/* * 配置路径 */protected void setPath(String str) {// TODO Auto-generated method stubFile file =  new File("c:\\Windows\\System32\\Fileconfig.ini");FileWriter fw;try {fw = new FileWriter(file);BufferedWriter bw = new BufferedWriter(fw);bw.write(str);bw.close();fw.close();} catch (IOException e) {// TODO Auto-generated catch block } }/* * 从文件中获取路径 */protected String getPath() {// TODO Auto-generated method stubFile file = null;FileReader fr = null ; BufferedReader br = null ;String path = null;file = new File("c:\\Windows\\System32\\Fileconfig.ini");try {fr = new FileReader(file);} catch (FileNotFoundException e1) {// TODO Auto-generated catch blocktry {file.createNewFile();} catch (IOException e) {// TODO Auto-generated catch blockpath = "c:\\Windows\\System32";}}br = new BufferedReader(fr);try {path = br.readLine();} catch (IOException e) {// TODO Auto-generated catch blockpath = "c:\\Windows\\System32";}return path;}/* * 信息显示 */protected void showInfo(String str) {// TODO Auto-generated method stubFile file = new File(str);text_Info.setText("文件是否是一个标准文件      :  " + file.isFile()+"\r\n");text_Info.append("文件是否是一个隐藏文件      :  " + file.isHidden()+"\r\n");text_Info.append("文件大小                    :  " + file.length()+"\r\n");try {FileInputStream fis = new FileInputStream(str);BufferedInputStream bis = new BufferedInputStream(fis);byte[] buf = new byte[1024];int len = 0;while((len = bis.read(buf))!=-1){String string = new String(buf , 0 ,len);text_Info.append("文件详情 :  \r\n" + string+"\r\n");}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}protected void showRoute(String str) {// TODO Auto-generated method stubtext_Route.setText(str);}}