HTTP实现断点续传简单实例

import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class Main {
    public static void main(String[] args) throws Exception {
        URL url = new URL("http://localhost:8080/testAjax/WebRoot/1.txt");
        URLConnection urlConnection = url.openConnection();
        urlConnection.addRequestProperty("Range", "byte=50-");
        InputStream is = urlConnection.getInputStream();
        int len = 0;
        byte buffer[] = new byte[1024];
        FileOutputStream fos = new FileOutputStream("c:", true);
        while ((len = is.read(buffer)) > 0) {
            fos.write(buffer, 0, len);
        }
        is.close();
        fos.close();
    }
}