Java_文件夹拷贝

<span style="color: #0000ff">import<span style="color: #000000"> java.io.File;
<span style="color: #0000ff">import<span style="color: #000000"> java.io.FileInputStream;
<span style="color: #0000ff">import<span style="color: #000000"> java.io.FileNotFoundException;
<span style="color: #0000ff">import<span style="color: #000000"> java.io.FileOutputStream;
<span style="color: #0000ff">import<span style="color: #000000"> java.io.IOException;
<span style="color: #0000ff">import<span style="color: #000000"> java.io.InputStream;
<span style="color: #0000ff">import<span style="color: #000000"> java.io.OutputStream;

<span style="color: #008000">/*<span style="color: #008000">

• 文件夹的拷贝
  1.递归查找子孙级文件
  2.文件复制
  文件夹创建

• <span style="color: #808080">@author<span style="color: #008000"> Administrator

• <span style="color: #008000">*/
  <span style="color: #0000ff">public <span style="color: #0000ff">class<span style="color: #000000"> CopyDirDemo {
  <span style="color: #0000ff">public <span style="color: #0000ff">static <span style="color: #0000ff">void<span style="color: #000000"> main(String[] args) {
  <span style="color: #008000">//<span style="color: #008000">源文件夹
  File src = <span style="color: #0000ff">new File("D:web13src"<span style="color: #000000">);
  <span style="color: #008000">//<span style="color: #008000">目标文件夹
  File dest = <span style="color: #0000ff">new File("D:"<span style="color: #000000">);

   </span><span style="color: #0000ff"&gt;try</span><span style="color: #000000"&gt; {
       copyDir(src,dest);
   } </span><span style="color: #0000ff"&gt;catch</span><span style="color: #000000"&gt; (IOException e) {
       </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; TODO Auto-generated catch block</span>

  <span style="color: #000000"> e.printStackTrace();
  }
  }
  <span style="color: #008000">/*<span style="color: #008000">

  • <span style="color: #808080">@param<span style="color: #008000"> src
  • <span style="color: #808080">@param<span style="color: #008000"> dest
  • <span style="color: #808080">@throws<span style="color: #008000"> IOException
    <span style="color: #008000">*/
    <span style="color: #0000ff">public <span style="color: #0000ff">static <span style="color: #0000ff">void copyDir(File src,File dest) <span style="color: #0000ff">throws<span style="color: #000000"> IOException {
    <span style="color: #008000">//<span style="color: #008000"> TODO Auto-generated method stub
    <span style="color: #008000">//<span style="color: #008000">判断源文件夹是否是一个文件夹
    <span style="color: #0000ff">if<span style="color: #000000">(src.isDirectory()){
    dest=<span style="color: #0000ff">new<span style="color: #000000"> File(dest,src.getName());
    <span style="color: #008000">//<span style="color: #008000">在目标文件夹中创建文件夹
    <span style="color: #000000"> dest.mkdirs();
    <span style="color: #008000">//<span style="color: #008000">获取原文件架中所有文件,文件并拷贝,文件夹创建
    <span style="color: #0000ff">for<span style="color: #000000">(File f:src.listFiles()){
    copyDir(f,<span style="color: #0000ff">new<span style="color: #000000"> File(dest,f.getName()));
    }
    }<span style="color: #0000ff">else <span style="color: #0000ff">if<span style="color: #000000">(src.isFile()){
    copyFile(src,dest);
    }

  }
  <span style="color: #008000">/*<span style="color: #008000">

  • 拷贝文件
  • <span style="color: #808080">@param<span style="color: #008000"> src
  • <span style="color: #808080">@param<span style="color: #008000"> dest
  • <span style="color: #808080">@throws<span style="color: #008000"> IOException
    <span style="color: #008000">*/
    <span style="color: #0000ff">public <span style="color: #0000ff">static <span style="color: #0000ff">void copyFile(File src,File dest) <span style="color: #0000ff">throws<span style="color: #000000"> IOException{
    <span style="color: #0000ff">if<span style="color: #000000">(dest.isDirectory()){
    <span style="color: #0000ff">try<span style="color: #000000"> {
    <span style="color: #0000ff">throw <span style="color: #0000ff">new Exception("目标是文件夹,不能拷贝"<span style="color: #000000">);
    } <span style="color: #0000ff">catch<span style="color: #000000"> (Exception e) {
    <span style="color: #008000">//<span style="color: #008000"> TODO Auto-generated catch block
    <span style="color: #000000"> e.printStackTrace();
    }
    }
    <span style="color: #0000ff">if<span style="color: #000000">(src.isFile()){
    <span style="color: #008000">//<span style="color: #008000">创建流
    InputStream is=<span style="color: #0000ff">new<span style="color: #000000"> FileInputStream(src);
    OutputStream os=<span style="color: #0000ff">new<span style="color: #000000"> FileOutputStream(dest);
    <span style="color: #008000">//<span style="color: #008000">拷贝
    <span style="color: #008000">//<span style="color: #008000">一次拷贝字节数
    <span style="color: #0000ff">byte []b=<span style="color: #0000ff">new <span style="color: #0000ff">byte[1024<span style="color: #000000">];
    <span style="color: #008000">//<span style="color: #008000">记录字节数
    <span style="color: #0000ff">int len=0<span style="color: #000000">;
    <span style="color: #0000ff">while(-1!=(len=<span style="color: #000000">is.read(b))){
    os.write(b,0<span style="color: #000000">,len);
    }
    <span style="color: #008000">//<span style="color: #008000">关闭流
    <span style="color: #000000"> os.close();
    is.close();
    }<span style="color: #0000ff">else<span style="color: #000000">{
    System.out.println("错误,不是文件"<span style="color: #000000">);
    }

  }
  }