Java实现 二进制读取和写入 拷贝文件

package com.lss.common.file;

import java.io.*;

/**
 * 二进制读取和写入 拷贝文件
 */
public class CopyBinary{
 public static long copy(File srcFile, File outFile) throws IOException {
  FileInputStream fis = null;
  DataInputStream dis = null;
  FileOutputStream fos = null;
  DataOutputStream out = null;
  long size = 0;
  try {
   fis = new FileInputStream(srcFile);
   dis = new DataInputStream(fis);
   fos = new FileOutputStream(outFile);
   out = new DataOutputStream(fos);
   int temp;
   byte[] b = new byte[2048];
   while ((temp = dis.read(b)) != -1) {
    fos.write(b);
    size += temp;
   }
  } catch (FileNotFoundException ex) {
   throw ex;
  } finally {
   if (fis != null)
    fis.close();
   if (out != null)
    out.close();
  }
  return size;
 }

 public static long copy(String srcFilePath, String destFilePath)
   throws Exception {
  if (srcFilePath == null) {
   throw new Exception("srcFilePath is null");
  }
  if(destFilePath == null){
   throw new Exception("destFilePath is null");
  }
  return copy(new File(srcFilePath), new File(destFilePath));
 }
}