java 多选按钮 java选择多个文件

您正在寻找的不是标准功能,但您可以使用JFileChooser.setAccessory(…)自定义选择器,它将JComponent作为参数.因此,您可以创建一个面板,其中包含一个列表,您可以添加和删除所选文件(或您要创建的任何其他JComponent),并将其作为附件添加到文件选择器中.

这是一个例子.我刚创建了可以通过选择文件添加的JList,并通过从列表中选择文件并单击删除来删除文件.单击“打开”时,可以从DefaultListModel获取所有文件

扩展JComponent的FileListAccessory类

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFileChooser;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.border.EmptyBorder;
public class FileListAccessory extends JComponent implements PropertyChangeListener {
private File file = null;
private DefaultListModel model;
private JList list;
private JButton removeItem;
public FileListAccessory(JFileChooser chooser) {
chooser.addPropertyChangeListener(this);
model = new DefaultListModel();
list = new JList(model);
JScrollPane pane = new JScrollPane(list);
pane.setPreferredSize(new Dimension(200, 250));
removeItem = createRemoveItemButton();
setBorder(new EmptyBorder(10, 10, 10, 10));
setLayout(new BorderLayout());
add(pane);
add(removeItem, BorderLayout.SOUTH);
}
public DefaultListModel getModel() {
return model;
}
private void addFileToList() {
model.addElement(file);
}
private void removeFileFromList() {
if (list.getSelectedIndex() != -1) {
model.remove(list.getSelectedIndex());
}
}
private JButton createRemoveItemButton() {
JButton button = new JButton("Remove");
button.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
removeFileFromList();
}
});
return button;
}
@Override
public void propertyChange(PropertyChangeEvent e) {
boolean update = false;
String prop = e.getPropertyName();
//If the directory changed, don't do anything
if (JFileChooser.DIRECTORY_CHANGED_PROPERTY.equals(prop)) {
file = null;
update = true;
//If a file became selected, find out which one.
} else if (JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(prop)) {
file = (File) e.getNewValue();
update = true;
}
if (update && file != null) {
addFileToList();
}
}
}

发射台

import java.io.File;
import javax.swing.DefaultListModel;
import javax.swing.JFileChooser;
import javax.swing.SwingUtilities;
public class JavaApplication4 {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JFileChooser fc = new JFileChooser();
FileListAccessory accessory = new FileListAccessory(fc);
fc.setAccessory(accessory);
int open = fc.showOpenDialog(fc);
if (open == JFileChooser.APPROVE_OPTION) {
DefaultListModel model = accessory.getModel();
for (int i = 0; i < model.getSize(); i++) {
System.out.println(((File)model.getElementAt(i)).getName());
}
}
}
});
}
}