以下是如何在 java 中复制文件并在命令行上监控进度:
import java.io.*;
public class FileCopyProgress {
public static void main(String[] args) {
System.out.println("copying file");
File filein = new File("test.big");
File fileout = new File("test_out.big");
FileInputStream fin = null;
FileOutputStream fout = null;
long length = filein.length();
long counter = 0;
int r = 0;
byte[] b = new byte[1024];
try {
fin = new FileInputStream(filein);
fout = new FileOutputStream(fileout);
while( (r = fin.read(b)) != -1) {
counter += r;
System.out.println( 1.0 * counter / length );
fout.write(b, 0, r);
}
}
catch(Exception e){
System.out.println("foo");
}
}
}
您将不得不以某种方式更新您的进度条而不是 System.out.println()
. 我希望这会有所帮助,但也许我不明白你的问题。