java多线程下载源码_java多线程下载源代码分享

水深无声 2022-11-02 14:29 227阅读 0赞

package data;import java.awt.\*;import java.awt.event.\*;import javax.swing.\*;import java.io.\*;import java.net.\*;public class Download6 extends FocusAdapter implements Runnable,ActionListener\{ JFrame frame; JTextField url\_txt,dir\_txt,name\_txt; JButton open\_btn,start\_btn; JProgressBar pro; JLabel l5; JTextArea mes\_txt; static JFileChooser chooser; String dir; static Thread thread; String urls,path; int ID; long start,end; //初始化参数 public Download6(String urls,String path,int ID,long start,long end,JTextArea mes\_txt) \{  this.urls=urls;  this.path=path;  this.ID=ID;  this.start=start;  this.end=end;  this.mes\_txt=mes\_txt;  \} //图形界面初始化 public Download6(String title) \{  frame=new JFrame(title);  frame.setLayout(null);  JLabel l1=new JLabel("网址(URL):");  frame.add(l1);  l1.setBounds(10,10,70,25);  url\_txt=new JTextField(20);  url\_txt.setText("http://");  url\_txt.setCaretPosition(url\_txt.getText().length());  url\_txt.setFont(new Font(null,Font.BOLD,15));  url\_txt.addFocusListener(this);  frame.add(url\_txt);  url\_txt.setBounds(75,10,315,25);  JSeparator line=new JSeparator();  frame.add(line);  line.setBounds(10,45,380,25);  JLabel l2=new JLabel("存放目录:");  frame.add(l2);  l2.setBounds(10,60,70,25);  dir\_txt=new JTextField(15);  dir\_txt.setText("请选择存放目录");  dir\_txt.setEditable(false);  frame.add(dir\_txt);  dir\_txt.setBounds(75,60,250,25);  open\_btn=new JButton("浏览");  frame.add(open\_btn);  open\_btn.setBounds(325,60,65,25);  JLabel l3=new JLabel("另存名称:");  frame.add(l3);  l3.setBounds(10,95,70,25);  name\_txt=new JTextField(20);  frame.add(name\_txt);  name\_txt.setBounds(75,95,315,25);  name\_txt.setFont(new Font(null,Font.BOLD,15));  mes\_txt=new JTextArea();  mes\_txt.setEditable(false);  mes\_txt.setWrapStyleWord(true);  JScrollPane sp=new JScrollPane(mes\_txt,JScrollPane.VERTICAL\_SCROLLBAR\_AS\_NEEDED,JScrollPane.HORIZONTAL\_SCROLLBAR\_AS\_NEEDED);  frame.add(sp);  sp.setBounds(10,125,380,80);  pro=new JProgressBar();  pro.setStringPainted(true);  frame.add(pro);  pro.setBounds(10,210,380,15);  JLabel l4=new JLabel("@逛悠人作品^\_^");  frame.add(l4);  l4.setBounds(10,240,100,25);  l5=new JLabel();  frame.add(l5);  l5.setBounds(150,240,100,25);  start\_btn=new JButton("开始下载");  frame.add(start\_btn);  start\_btn.setBounds(290,240,100,25);  frame.setLocation(300,200);  frame.setSize(405,300);  frame.setVisible(true);  frame.setResizable(false);  frame.setDefaultCloseOperation(JFrame.EXIT\_ON\_CLOSE);  open\_btn.addActionListener(this);  start\_btn.addActionListener(this); \} //监听两个按钮方法 public void actionPerformed(ActionEvent e) \{  Object s=e.getSource();  if(s.equals(open\_btn))  \{   openfile();  \}  else  \{   String urls=url\_txt.getText();      try   \{    long time=System.currentTimeMillis()/1000;    URL url=new URL(urls);    URLConnection con=url.openConnection();    int filelength=con.getContentLength();    int num=10;    int size=filelength/num;    String path=dir\_txt.getText()+name\_txt.getText();    Thread t=null;    CountTime count=new CountTime(urls,path,name\_txt.getText(),time,l5,pro,mes\_txt,start\_btn);    count.start();    for(int i=0;i