downloadframe.java

该多线程下载工具功能强大

package coursedesign;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.Border;

public class DownLoadFrame extends JDialog implements ActionListener {

	// 创建容器
	private JPanel p1 = new JPanel();

	private JPanel p2 = new JPanel();

	private JPanel p3 = new JPanel();

	private JPanel p4 = new JPanel();

	private JPanel p5 = new JPanel();

	private JPanel p6 = new JPanel();

	// 创建边框
	Border border1;

	// 创建标签
	JLabel l1 = new JLabel("    ");

	JLabel l2 = new JLabel("地址:");

	JLabel l3 = new JLabel("存储目录:");

	JLabel l4 = new JLabel("下载线程数：     ");

	JLabel l5 = new JLabel("                                  ");

	JLabel l6 = new JLabel("另存名称:");

	// 创建文件框
	JTextField t1 = new JTextField(30);

	JTextField t2 = new JTextField(15);

	JTextField t3 = new JTextField(15);

	// 创建按钮
	JButton b1 = new JButton("浏览");

	JButton b2 = new JButton("开始下载");

	// 创建下拉框
	JComboBox jb = new JComboBox();

	// 构造器
	public DownLoadFrame() {
		/*
		 * @对各个组件进行装载及布局的设置
		 */
		
		//t1.setText("http://www.cxxy8.cn/稻香.mp3");
		t1.setText("http://localhost:8088/qq.rar");
		t2.setText("C:");
		border1 = BorderFactory.createEmptyBorder(15, 15, 15, 15);
		p1.setLayout(new GridLayout(5, 0));
		p1.setLayout(new FlowLayout(FlowLayout.LEFT));
		p2.add(l2);
		p3.add(t1);
		p4.add(l3);
		p4.add(t2);
		p4.add(l1);
		p4.add(b1);
		p5.add(l6);
		p5.add(t3);
		p6.add(l4);

		for (int i = 1; i <= 20; i++) {
			jb.addItem("" + i);
		}
		jb.setSelectedIndex(4);
		p6.add(jb);
		p6.add(l5);
		p6.add(b2);
		p1.setBorder(border1);
		p1.add(p2);
		p1.add(p3);
		p1.add(p4);
		p1.add(p5);
		p1.add(p6);

		this.add(p1);
		this.setSize(450, 225);
		this.setLocation(370, 350);
		this.setResizable(false);
		this.setModal(true);
		this.dispose();

		// 添加监听
		b1.addActionListener(this);
		b2.addActionListener(this);

	}

	// 设置监听
	public void actionPerformed(ActionEvent e) {
		if (e.getSource() == b1) {
			// 创建一个文件选择器
			JFileChooser chooser = new JFileChooser();
			chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
			int result = chooser.showDialog(null, "打开");
			if (result == JFileChooser.APPROVE_OPTION) {
				t2.setText(chooser.getSelectedFile().getAbsolutePath());
				if (!t1.getText().equals("")) {
					b2.setEnabled(true);
					String str = t1.getText();
					String[] s = str.split("/");
					int i = s.length;
					t3.setText(s[i - 1]);
				}
			}
		}
	}

}