java 文件复制，亲测可用

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;


public class CopFile_util {

    public static void main(String[] args) throws IOException {
        //add_file("D:\img\xaizai\163377411171847lfayul\wen");
        copyFileUsingFileChannels("E:\Picture\guowang\a\1.png","E:\Picture\guowang\b\1.png","E:\Picture\guowang\b");
        
    }

    
    public static void copyFileUsingFileChannels(String statFile,String endFile,String url) throws IOException {
        System.out.println ("statFile:"+statFile );
        System.out.println ("endFile:"+endFile );
        System.out.println ("url:"+url );
        //创建文件夹
        //File file=new File("E:\Picture\guowang\3");
        File file=new File(url);
        if(!file.exists()&&!file.isDirectory()) {
            file.mkdirs();
        }


        File source = new File(statFile);
        File dest = new File(endFile);

        FileChannel inputChannel = null;
        FileChannel outputChannel = null;
        try {
            inputChannel = new FileInputStream (source).getChannel();
            outputChannel = new FileOutputStream (dest).getChannel();
            outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
        } finally {
            inputChannel.close();
            outputChannel.close();
        }
    }

    public static void add_file(String url){//主程序，程序入口
        File file = new File(url);
        //如果路径不存在，新建
        if(!file.exists()&&!file.isDirectory()) {
            file.mkdirs();
        }

    }

}