filecopywithbar.java

初学的好东西值得一看看欢迎下载观看使用

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import javax.swing.JFrame;
import java.awt.FlowLayout;
import javax.swing.JProgressBar;
import javax.swing.JLabel;
class FileCopyWithBar{
	public static void main(String[] args){
		if(args.length!=2)
			System.out.println("Usage:FileCopyWithBar file1 file2");
		else{
			File f_obj1=new File(args[0]);
			File f_obj2=new File(args[1]);
			try{
				if(!f_obj1.isFile())
					System.out.println(args[0]+"文件并不存在,无法拷贝.");
				else{
					FileInputStream fis=new FileInputStream(f_obj1);
					BufferedInputStream bis=new BufferedInputStream(fis);
					FileOutputStream fos=new FileOutputStream(f_obj2);
					BufferedOutputStream bos=new BufferedOutputStream(fos);
					long file_length=f_obj1.length();
					long block=file_length/10000;
					ShowJProgressBar showJProgressBar1=new ShowJProgressBar();
					int f_data;	
					long count=1;
					int bar_value=1;			
					do{
						f_data=bis.read();
						if(f_data!=-1){
							bos.write(f_data);
							count++;
							if(count%block==0){
								bar_value++;
								showJProgressBar1.setValue(bar_value);
							}
						}
					}while(f_data!=-1);
					showJProgressBar1.setValue(100);
					bis.close();
					bos.close();
				}
			}catch(IOException e){
				System.out.println("文件IO出错!");
			}
		}
	}
}

class ShowJProgressBar extends JFrame{
	FlowLayout flowLayout1=new FlowLayout();
	JProgressBar jProgressBar1=new JProgressBar(1,100);
	JLabel jLabel1=new JLabel("拷贝进度:");
	ShowJProgressBar(){
		super("进度条示例");
		setSize(300,80);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.getContentPane().setLayout(flowLayout1);
		this.getContentPane().add(jLabel1);
		jProgressBar1.setStringPainted(true);
		this.getContentPane().add(jProgressBar1);
		show();
	}
	public void setValue(int n){
		jProgressBar1.setValue(n);
	}
		
}