java 文件复制

public void  CopyFile(String FilePath,String outFilePath){
		
		try {
			FileInputStream fi = new FileInputStream(FilePath);
			BufferedInputStream in = new BufferedInputStream(fi);
			FileOutputStream fo = new FileOutputStream(outFilePath);
			BufferedOutputStream out = new BufferedOutputStream(fo);

			byte[] buf = new byte[1024];
			int len = in.read(buf);// 读文件，将读到的内容放入到buf数组中，返回的是读到的长度
			while (len != -1) {
				out.write(buf, 0, len);
				len = in.read(buf);
			}

			out.close();
			fo.close();
			in.close();
			fi.close();
		   } catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
	}