在 Java 中选择文件夹目标?

问题描述

我是 Java 的新手.我正在尝试动态选择文件位置来保存我的项目结果(在我的项目开始时启动).我使用了几个 FileDialog 示例，但每个示例都允许我选择文件而不是文件夹.

I am a newbie to Java. I am trying to dynamically choose the file location to save the outcome of my project (to be initiated at the very start of my project). I worked around with a few FileDialog examples, but each one of them allows me to choose a file and not a folder.

谁能帮我提供一个示例(或)链接到相同的示例?

Can anyone please help me with an example (or) link to one for the same?

推荐答案

你可以尝试这样的事情(如下所示:选择带有 JFileChooser 的目录):

You could try something like this (as shown here: Select a Directory with a JFileChooser):

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.util.*;


public class DemoJFileChooser extends JPanel
   implements ActionListener {
   JButton go;

   JFileChooser chooser;
   String choosertitle;

  public DemoJFileChooser() {
    go = new JButton("Do it");
    go.addActionListener(this);
    add(go);
   }

  public void actionPerformed(ActionEvent e) {
    chooser = new JFileChooser();
    chooser.setCurrentDirectory(new java.io.File("."));
    chooser.setDialogTitle(choosertitle);
    chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
    //
    // disable the "All files" option.
    //
    chooser.setAcceptAllFileFilterUsed(false);
    //
    if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
      System.out.println("getCurrentDirectory(): "
         +  chooser.getCurrentDirectory());
      System.out.println("getSelectedFile() : "
         +  chooser.getSelectedFile());
      }
    else {
      System.out.println("No Selection ");
      }
     }

  public Dimension getPreferredSize(){
    return new Dimension(200, 200);
    }

  public static void main(String s[]) {
    JFrame frame = new JFrame("");
    DemoJFileChooser panel = new DemoJFileChooser();
    frame.addWindowListener(
      new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
          System.exit(0);
          }
        }
      );
    frame.getContentPane().add(panel,"Center");
    frame.setSize(panel.getPreferredSize());
    frame.setVisible(true);
    }
}

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