断点下载器还在实现中。。。。。。
//////////////////////////////////界面///////////////////////////////////////////
package com.company.www.me.net;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class DownLoadTool extends JFrame {
public static void main(String[] args) {
final DownLoadTool tool = new DownLoadTool();
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
SwingUtilities.updateComponentTreeUI(tool.getContentPane());
} catch (Exception e) {
e.printStackTrace();
}
tool.setResizable(false);
tool.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
tool.setTitle("DownLoadTool");
int x = Toolkit.getDefaultToolkit().getScreenSize().width/2-180;
int y = Toolkit.getDefaultToolkit().getScreenSize().height/2-90;
tool.setLocation(x,y);
tool.setSize(430, 280);
tool.setLayout(new GridBagLayout());
JLabel label = new JLabel("URL: ");
GridBagConstraints labelCtrl = new GridBagConstraints();
labelCtrl.gridx = 0;
labelCtrl.gridy = 0;
labelCtrl.gridheight = 1;
labelCtrl.gridwidth = 1;
labelCtrl.anchor = GridBagConstraints.WEST;
JScrollPane scrollPane = new JScrollPane();
final JTextArea textArea = new JTextArea();
scrollPane.setViewportView(textArea);
scrollPane.setPreferredSize(new Dimension(320,33));
GridBagConstraints scrollPaneCtrl = new GridBagConstraints();
scrollPaneCtrl.gridx = 1;
scrollPaneCtrl.gridy = 0;
scrollPaneCtrl.gridheight = 1;
scrollPaneCtrl.gridwidth = 2;
scrollPaneCtrl.anchor = GridBagConstraints.EAST;
scrollPaneCtrl.insets = new Insets(8,0,8,0);
JLabel label2 = new JLabel("To: ");
GridBagConstraints label2Ctrl = new GridBagConstraints();
label2Ctrl.gridx = 0;
label2Ctrl.gridy = 1;
label2Ctrl.gridheight = 1;
label2Ctrl.gridwidth = 1;
label2Ctrl.anchor = GridBagConstraints.WEST;
final JTextField textField = new JTextField(22);
textField.setText("C:/Documents and Settings/wangbijian/デスクトップ/WebTest/DownLoad");
GridBagConstraints textFieldCtrl = new GridBagConstraints();
textFieldCtrl.gridx = 1;
textFieldCtrl.gridy = 1;
textFieldCtrl.gridheight = 1;
textFieldCtrl.gridwidth = 1;
JButton Tobtn = new JButton("Choose Path...");
Tobtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent actionevent) {
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int returnVal = fileChooser.showOpenDialog(tool);
if(returnVal == JFileChooser.APPROVE_OPTION) {
textField.setText(fileChooser.getSelectedFile().toString());
}
}
});
GridBagConstraints TobtnCtrl = new GridBagConstraints();
TobtnCtrl.gridx = 2;
TobtnCtrl.gridy = 1;
TobtnCtrl.gridheight = 1;
TobtnCtrl.gridwidth = 1;
TobtnCtrl.anchor = GridBagConstraints.EAST;
JLabel label3 = new JLabel("Thread Count: ");
GridBagConstraints label3Ctrl = new GridBagConstraints();
label3Ctrl.gridx = 0;
label3Ctrl.gridy = 2;
label3Ctrl.gridheight = 1;
label3Ctrl.gridwidth = 1;
label3Ctrl.insets = new Insets(8,0,0,0);
label3Ctrl.anchor = GridBagConstraints.WEST;
final JTextField threadField = new JTextField(28);
GridBagConstraints threadFieldCtrl = new GridBagConstraints();
threadFieldCtrl.gridx = 1;
threadFieldCtrl.gridy = 2;
threadFieldCtrl.gridheight = 1;
threadFieldCtrl.gridwidth = 2;
threadFieldCtrl.insets = new Insets(8,0,0,0);
threadFieldCtrl.anchor = GridBagConstraints.WEST;
final JScrollPane progressPane = new JScrollPane();
progressPane.setPreferredSize(new Dimension(380,80));
final JPanel panel = new JPanel();
progressPane.setViewportView(panel);
GridBagConstraints progressPaneCtrl = new GridBagConstraints();
progressPaneCtrl.gridx = 0;
progressPaneCtrl.gridy = 4;
progressPaneCtrl.gridheight = 1;
progressPaneCtrl.gridwidth = 3;
progressPaneCtrl.anchor = GridBagConstraints.CENTER;
JButton btn = new JButton("DownLoad");
GridBagConstraints btnCtrl = new GridBagConstraints();
btnCtrl.gridx = 0;
btnCtrl.gridy = 3;
btnCtrl.gridheight = 1;
btnCtrl.gridwidth = 3;
btnCtrl.insets = new Insets(18,18,18,18);
btnCtrl.anchor = GridBagConstraints.CENTER;
btn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent actionevent) {
final JLabel progressLabel = new JLabel();
final JProgressBar progressBar = new JProgressBar();
progressBar.setVisible(false);
panel.add(progressLabel);
panel.add(progressBar);
final String DownLoadPath = textArea.getText();
final String Topath = textField.getText();
int threadCount1 = 1;
if (threadField.getText()!=null&&!threadField.getText().trim().equals(""))
{
threadCount1 = Integer.parseInt(threadField.getText());
}
final int threadCount = threadCount1;
if (DownLoadPath==null||"".equals(DownLoadPath)) {
JOptionPane.showMessageDialog(tool, "Please input URL!");
return;
}
else if(Topath==null||"".equals(Topath)) {
JOptionPane.showMessageDialog(tool, "Please select save path!");
return;
}
else if(Topath!=null&&DownLoadPath!=null||"".equals(Topath.trim())&&"".equals(DownLoadPath.trim())) {
new Thread(){
public void run() {
progressBar.setVisible(true);
progressBar.setValue(0);
new DownLoadToolClass(progressBar,DownLoadPath,Topath,threadCount).DownLoadFile(progressLabel);
}
}.start();
}
}
});
tool.add(label,labelCtrl);
tool.add(scrollPane,scrollPaneCtrl);
tool.add(label2,label2Ctrl);
tool.add(textField,textFieldCtrl);
tool.add(Tobtn,TobtnCtrl);
tool.add(label3,label3Ctrl);
tool.add(threadField,threadFieldCtrl);
tool.add(progressPane,progressPaneCtrl);
tool.add(btn,btnCtrl);
tool.setVisible(true);
}
}
//////////////////////////////关键下载类//////////////////////////////////////
package com.company.www.me.net;
import java.io.File;
import java.io.InputStream;
import java.io.RandomAccessFile;
import java.net.URL;
import java.net.URLConnection;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
public class DownLoadToolClass {
String DownLoadPath;
String Topath;
int threadCount;
JProgressBar progressBar;
public DownLoadToolClass(JProgressBar progressBar,String downLoadPath, String topath,int threadCount) {
this.progressBar = progressBar;
this.DownLoadPath = downLoadPath;
this.Topath = topath;
this.threadCount = threadCount;
}
public void DownLoadFile(JLabel progressLabel){
try {
int size;
int blockSize;
int EndBlockSize = -1;
URL url = new URL(DownLoadPath);
URLConnection conn = url.openConnection();
size = conn.getContentLength();
File file = new File(Topath);
RandomAccessFile randomAccessFile = new RandomAccessFile(file,"rw");
randomAccessFile.setLength(size);
randomAccessFile.close();
if (0==size%threadCount)
blockSize = size/threadCount;
else{
blockSize = size/threadCount;
EndBlockSize = size%threadCount;
}
File file2 = new File(Topath+".wbj");
if (file2.exists()) {
file2.delete();
file2.createNewFile();
}
RandomAccessFile os = new RandomAccessFile(file2,"rw");
os.setLength(threadCount*32);
os.close();
this.progressBar.setIndeterminate(false);
this.progressBar.setMaximum(size);
for (int i = 0; i <= threadCount; i++) {
if (i==threadCount && EndBlockSize!=-1) {
if (i*blockSize<size) {
multithreadDown(this.progressBar,progressLabel,i,i*blockSize,i*blockSize + EndBlockSize);
}
}
else {
if (i*blockSize<size) {
multithreadDown(this.progressBar,progressLabel,i,i*blockSize,i*blockSize + blockSize);
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void multithreadDown(final JProgressBar progressBar,final JLabel progressLabel,final int threadId,final int begin,final int end){
new Thread(){
public void run() {
RandomAccessFile os = null;
RandomAccessFile randomAccessFile = null;
try {
byte[] b = new byte[1024];
int fontCount;
String ll = begin + " " + (end - 1);
int lenght2 = 0;
File file = new File(Topath);
File file2 = new File(Topath+".wbj");
os = new RandomAccessFile(file2,"rw");
randomAccessFile = new RandomAccessFile(file,"rw");
randomAccessFile.seek(begin);
URL url = new URL(DownLoadPath);
URLConnection conn = url.openConnection();
conn.setRequestProperty("RANGE", "bytes="+begin+"-"+(end -1));
conn.connect();
InputStream is = conn.getInputStream();
while ((fontCount = is.read(b))!=-1) {
randomAccessFile.write(b,0,fontCount);
synchronized (progressBar) {
float size = progressBar.getMaximum();
int downAll = progressBar.getValue() + fontCount;
float downD = downAll;
float d = downD/size*100;
String progress;
if (String.valueOf(d).length()>4) {
progress = String.valueOf(d).substring(0, 4) +"%";
}
else {
progress = String.valueOf(d)+"%";
}
progressLabel.setText(progress);
progressBar.setValue(downAll);
if (downAll==size) {
progressBar.setVisible(false);
progressLabel.setText("Download complete");
}
}
lenght2 +=fontCount;
os.seek(threadId*32);
os.write((ll + " " + lenght2 + "
").getBytes());
}
os.close();
randomAccessFile.close();
} catch (Exception e) {
e.printStackTrace();
}
finally{
try {
Thread.currentThread().stop();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}.start();
}
}