JAVA拷贝

/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package cn.lsd; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.logging.Level; import java.util.logging.Logger; /** * * @date 2008-11-26 * @author lsd */ public class Cpp { private String sourceFile; private String destFile; public Cpp(String sourceFile,String destFile){ this.sourceFile = sourceFile; this.destFile = destFile; doCopy(); } private void doCopy() { FileInputStream in =null; FileOutputStream out =null; byte[] buffer = new byte[102400]; try { in = new FileInputStream(this.sourceFile); File dest = new File(this.destFile); if(!dest.exists()){//目标文件对应的目录不存在，创建新的目录 int index = new String(this.destFile).lastIndexOf("/"); String path = this.destFile.substring(0, index); new File(path).mkdirs(); } out = new FileOutputStream(this.destFile); int num =0; while((num=in.read(buffer))!=-1){ out.write(buffer,0,num); } } catch (FileNotFoundException ex) { Logger.getLogger(Cpp.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException e){ Logger.getLogger(Cpp.class.getName()).log(Level.SEVERE, null, e); } finally{ try { if(in!=null) in.close(); if(out!=null) out.close(); } catch (IOException ex) { Logger.getLogger(Cpp.class.getName()).log(Level.SEVERE, null, ex); } } } public static void main(String[] args){ String sourceFile = "d:/颐和园yhy[小新奉献].rmvb"; String destFile = "D:/s/sd/1.rmvb"; long startTime =System.currentTimeMillis(); System.out.println("start to copy"); Cpp c= new Cpp(sourceFile,destFile); long endTime = System.currentTimeMillis(); long time = (endTime-startTime)/1000; System.out.println("copy end;cost:"+time); } }