Java的swing界面拖拽文件至文本框显示文件路径

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/java_faep/article/details/53523401

import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.TransferHandler;

/**
 * 拖拽文件至文本框显示文件路径
 */
public class CopyPathToTextField extends JFrame
{
    private static final long serialVersionUID = 1L;
    private JTextField field;
    public CopyPathToTextField(){
        
        this.setTitle("拖拽文件至文本框显示文件路径");
        this.setSize(500, 300);
        this.setLocationRelativeTo(null);
        this.setLayout(null);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        field = new JTextField();
        field.setBounds(50, 50, 300, 30);
        
        field.setTransferHandler(new TransferHandler()
        {
            private static final long serialVersionUID = 1L;
            @Override
            public boolean importData(JComponent comp, Transferable t) {
                try {
                    Object o = t.getTransferData(DataFlavor.javaFileListFlavor);

                    String filepath = o.toString();
                    if (filepath.startsWith("[")) {
                        filepath = filepath.substring(1);
                    }
                    if (filepath.endsWith("]")) {
                        filepath = filepath.substring(0, filepath.length() - 1);
                    }
                    System.out.println(filepath);
                    field.setText(filepath);
                    return true;
                }
                catch (Exception e) {
                    e.printStackTrace();
                }
                return false;
            }
            @Override
            public boolean canImport(JComponent comp, DataFlavor[] flavors) {
                for (int i = 0; i < flavors.length; i++) {
                    if (DataFlavor.javaFileListFlavor.equals(flavors[i])) {
                        return true;
                    }
                }
                return false;
            }
        });
        
        this.add(field);
        this.setVisible(true);
    }
    
    public static void main(String[] args) {
        new CopyPathToTextField();
    }
}

运行效果如下图显示：