java开发的多线程下载工具（有源码，可运行）

package globleGet.gui; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.io.*; import globleGet.download.*; import globleGet.gui.*; import java.util.ArrayList; public class MainFrame extends JFrame { private DefaultListModel model; private JList lst_downfiles; private ItemPane itp_fileProperity; private ToolPane toolpane; private int lst_pos=-1; public MainFrame() { super("GlobalGet 多线程下载程序"); ini(); setGUI(); setEvent(); Displace dis=new Displace(); dis.setDaemon(true); dis.setPriority(7); dis.start(); } /** *功能：加载序列化文件 */ private void ini() { File myDownfiles=new File(".\\downfiles.data"); if (myDownfiles.exists()) { ObjectInputStream ois=null; try { ois=new ObjectInputStream(new FileInputStream(myDownfiles)); model=(DefaultListModel)(ois.readObject()); ois.close(); DownLoadInfo tmp_info; int len=model.getSize(); for(int i=0;i<len;i++) { tmp_info=(DownLoadInfo)(model.getElementAt(i)); if (!tmp_info.isFinished()) { MultiDownLoad md=new MultiDownLoad(tmp_info); md.MultiDown(); } } lst_pos=len-1; } catch(Exception e) { try { ois.close(); } catch(Exception e1) {} JOptionPane.showMessageDialog(this,"加载历史下载文件出错！"); return; } } else { model=new DefaultListModel(); } } /** *功能：保存序列化文件 */ private void saveModel() { ObjectOutputStream oos=null; try { oos=new ObjectOutputStream(new FileOutputStream(".\\downfiles.data")); oos.writeObject(model); } catch(Exception e) { JOptionPane.showMessageDialog(this,"系统关闭时出错，可能丢失部分下载信息！"); } finally { try { oos.close(); } catch(Exception e2) {} } } public void setGUI() { //构建List列表布局 lst_downfiles=new JList(model); lst_downfiles.setBorder(BorderFactory.createEtchedBorder()); JScrollPane sp_lst=new JScrollPane(lst_downfiles); sp_lst.setPreferredSize(new Dimension(200,360) ) ; //创建文件下载属性面板 itp_fileProperity=new ItemPane(); itp_fileProperity.setPreferredSize(new Dimension(400,360) ) ; //构建窗口上方布局 JPanel top_pane=new JPanel(); top_pane.setLayout(new BorderLayout()); top_pane.add(sp_lst,BorderLayout.WEST); top_pane.add(itp_fileProperity,BorderLayout.CENTER); top_pane.setBorder(BorderFactory.createEtchedBorder()); //创建toolbar面板 toolpane=new ToolPane(); //构建Frame布局 this.setLayout(new BorderLayout()); this.getContentPane().add(top_pane,BorderLayout.CENTER); this.getContentPane().add(toolpane,BorderLayout.SOUTH); //设置Frame显示属性 this.setSize(600,400); this.setLocation(200,200); this.setVisible(true); this.setResizable(false); } public void setEvent() { //this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.toolpane.btnTask.addActionListener(new AddTaskListener(this)); this.toolpane.btnClose.addActionListener(new CloseListener()); this.lst_downfiles.addListSelectionListener(new SelectTaskListener()); this.addWindowListener(new JFrameCloseListener()); } public static void main(String[] args) { new MainFrame(); } //事件监听器程序 //添加下载任务监听器类 class AddTaskListener implements ActionListener { MainFrame f; public AddTaskListener(MainFrame f) { this.f=f; } public void actionPerformed(ActionEvent e) { //调用添加任务对话框 TaskDialog taskInfo=new TaskDialog(f); //创建下载任务 if (taskInfo.getBtn()) { addTask(taskInfo); } } } //点击关闭按钮监听器类 class CloseListener implements ActionListener { public void actionPerformed(ActionEvent e) { saveModel(); System.exit(0); } } //点击JFrame关闭窗口监听器类 class JFrameCloseListener extends WindowAdapter { public void windowClosing(WindowEvent e) { saveModel(); System.exit(0); } } //列表框选择内容改变监听器 class SelectTaskListener implements ListSelectionListener { public void valueChanged(ListSelectionEvent e) { int index=lst_downfiles.getSelectedIndex(); setFileProperity(index); lst_pos=index; } } //设置下载文件属性 private void setFileProperity(int index) { DownLoadInfo tmp_info=(DownLoadInfo)(model.elementAt(index)); String tmp_file=tmp_info.getSaveFileName(); float tmp_len=tmp_info.getFileLength(); itp_fileProperity.lab_filename.setText(tmp_file.substring(tmp_file.lastIndexOf("\\")+1)); if (tmp_len<500) { itp_fileProperity.lab_filesize.setText(tmp_len+"bytes"); } else if(tmp_len<1024*1024) { tmp_len=Math.round(tmp_len/1024*100)/100.0f; itp_fileProperity.lab_filesize.setText(tmp_len+"k"); } else { tmp_len=Math.round(tmp_len/1024/1024*100)/100.0f; itp_fileProperity.lab_filesize.setText(tmp_len+"M"); } itp_fileProperity.pbar_model.setValue(tmp_info.getDownProgress()); itp_fileProperity.pbar.setString("下载进度"+itp_fileProperity.pbar.getValue()+"%"); tmp_len=tmp_info.getDownSpeed(); itp_fil