JFileChooser怎么保存特定的文件类型-Java教程-爱易网页

JFileChooser怎么保存特定的文件类型

日期：2014-05-20　浏览次数：20740 次

JFileChooser如何保存特定的文件类型啊
我想用JFileChooser保存特定的文件类型,如果保存的不是指定的文件类型,则弹出一个JDialog,但我实在不会写了..请各位大侠帮忙啊..我的源代码是..
package gui;

import java.io.File;

import javax.swing.filechooser.FileFilter;

public class MyFilter extends FileFilter{
private String extenssion;

public MyFilter(String extenssion){
this.extenssion = extenssion;
}
@Override
public boolean accept(File file) {
if(file.getName().endsWith(extenssion)){
return true;
}else return false;
}

@Override
public String getDescription() {

return null;
}

}

package gui;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.filechooser.FileFilter;

public class Demo4 extends JFrame implements ActionListener {
private JButton closeButton, openButton, saveButton;
private JDialog dia;
private JFileChooser chooser;
private FileFilter filter;

public Demo4() {
this.setLayout(new FlowLayout());
this.setSize(800, 800);
closeButton = new JButton("关闭");
openButton = new JButton("打开");
saveButton = new JButton("保存");
closeButton.addActionListener(this);
openButton.addActionListener(this);
saveButton.addActionListener(this);

dia = new JDialog(this);
dia.setSize(400, 400);
dia.add(closeButton);

this.add(openButton);
this.add(saveButton);
chooser = new JFileChooser();

}

public void actionPerformed(ActionEvent e) {
chooser = new JFileChooser();
String name = e.getActionCommand();
if (name.equals("打开")) {

chooser.showOpenDialog(this);
} else if (name.equals("保存")) {

chooser.addChoosableFileFilter(new MyFilter(".xls"));
chooser.showSaveDialog(this);

}
}

public static void main(String[] args) {
new Demo4().setVisible(true);
}
}

------解决方案--------------------
代码太乱了..选择的时候是要先创建你要保存文件的类型..下面.我自己写了两个功能差不多的..楼主请看下:

Java code


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.filechooser.FileFilter;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.Document;
import javax.swing.text.StyledDocument;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class TestFileDialog {

    
    public static void main(String[] args) {
        new FileDialog();
    }

}

class FileDialog {
    private File currentFile =null;
    public  static JTextPane display;
    private JFrame frame=new JFrame("File");
    private JButton openButton,deleteButton,redoButton,saveButton;
    private Container container=frame.getContentPane();
    private JPanel panel;
    private boolean change;
    private JScrollPane scroll;
    private JMenuBar menuBar;
    private JMenu fileMenu=new JMenu("文件");
    private JLabel statusBar = new JLabel();
    private JToolBar toolBar = new JToolBar();
    private JMenuItem fileMenuItem,openMenuItem,exitMenuItem;
    private StyledDocument styledDoc=new DefaultStyledDocument();
    private Document doc;
    private static Map<String,ImageIcon> iconsMap = new HashMap<String,ImageIcon>();
    private static ImageIcon[] icons = null;
    
    static {
        icons =new ImageIcon[]{
                new ImageIcon(TestFileDialog.class.getClassLoader().getResource("images/save.gif")),
                new ImageIcon(TestFileDialog.class.getClassLoader().getResource("images/open.gif")),
                new ImageIcon(TestFileDialog.class.getClassLoader().getResource("images/title.gif"))
        };
        iconsMap.put("open", icons[1]);
        iconsMap.put("save",icons[0]);
        iconsMap.put("title",icons[2]);
    }
    
    public FileDialog() {
        /*
        try{
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
            
        }catch(Exception e){
            e.printStackTrace();
        }
         */
        frame.setSize(800,600);
        frame.setLocation(400,100);
        frame.setIconImage(Toolkit.getDefaultToolkit().getImage(TestFileDialog.class.getClassLoader().getResource("images/title.gif")));
        
        
        openButton =new JButton("打开",icons[1]);
        //redoButton =new JButton("RedoButton");
        saveButton =new JButton("保存",icons[0]);
        
        menuBar =new JMenuBar();
        menuBar.add(fileMenu);
        fileMenuItem = new JMenuItem("保存");
        openMenuItem = new JMenuItem("打开");
        exitMenuItem = new JMenuItem("退出");
        fileMenu.add(openMenuItem);
        fileMenu.add(fileMenuItem);
        fileMenu.addSeparator();
        fileMenu.add(exitMenuItem);
        
        display= new JTextPane(styledDoc);
        styledDoc.addDocumentListener(new documentLis());//
        doc=display.getDocument();
        display.setFont(new Font("宋体", Font.PLAIN, 20));
        
        container.setLayout(new BorderLayout());
        container.add(display,"Center");
        toolBar.add(saveButton);
        toolBar.addSeparator();
        container.add(statusBar,"South");
        toolBar.add(openButton);
        container.add(toolBar,"North");
        
        scroll = new JScrollPane(display);
        container.add(scroll);
        frame.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
        frame.addWindowListener(new WindowAdapter(){
            public void windowClosing (WindowEvent e) {
                System.exit(0);
            }
        });
        
        
        frame.setJMenuBar(menuBar);
        frame.setVisible(true);
        
        //事件管理驱动
        ActionListener file = new fileAction();
        
        //添加事件
        exitMenuItem.addActionListener(file);
        openMenuItem.addActionListener(file);
        saveButton.addActionListener(file);
        fileMenuItem.addActionListener(file);
        openButton.addActionListener(file);
    
        
    }

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