下面的示例展示如何显示“打开文件”对话框,以在基于swing的应用程序中选择多个文件。
使用以下API -
JFileChooser
- 创建文件选择器。JFileChooser.showOpenDialog()
- 显示打开的文件对话框。JFileChooser.setMultiSelectionEnabled(true)
- 启用多个文件选择。
示例
package com.yiibai.swingdemo;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class SwingTester {
public static void main(String[] args) {
createWindow();
}
private static void createWindow() {
JFrame frame = new JFrame("Swing文件对话框选择多个文件");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
createUI(frame);
frame.setSize(560, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static void createUI(final JFrame frame){
JPanel panel = new JPanel();
LayoutManager layout = new FlowLayout();
panel.setLayout(layout);
JButton button = new JButton("点击这里开始~");
final JLabel label = new JLabel();
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JFileChooser fileChooser = new JFileChooser();
fileChooser.setMultiSelectionEnabled(true);
int option = fileChooser.showOpenDialog(frame);
if(option == JFileChooser.APPROVE_OPTION){
File[] files = fileChooser.getSelectedFiles();
String fileNames = "";
for(File file: files){
fileNames += file.getName() + " ";
}
label.setText("选中的文件有: " + fileNames);
}else{
label.setText("打开命令取消");
}
}
});
panel.add(button);
panel.add(label);
frame.getContentPane().add(panel, BorderLayout.CENTER);
}
}
执行上示例代码,得到以下结果: