java读取目录文件复制特定文件

package com.xt.action;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class Test {

 /**
  * @param args
  */
 public static void main(String[] args) {
  
  //十六进制转换十进制
  String s = "7890abcd";  
  String s1 = Integer.toString(Integer.parseInt(s, 16));  
  String s2 = Long.toString(Long.parseLong(s, 16)); 
  System.out.println(s1 +"\t"+ s2);
  
  //读取文件
  try {
   readfile("D:\\360Downloads");
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
  //复制文件
  File file1 = new File("D:/360Downloads/WinRAR_4.20_SC.exe");
  File file2 = new File("D:/360Downloads/WinRARaaaaaaaaa.exe");
  try {
   copyFile(file1, file2);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
 }
 
 
 /**
     * 读取某个文件夹下的所有文件
     */
    public static boolean readfile(String filepath) throws FileNotFoundException, IOException {
            try {

                    File file = new File(filepath);
                    if (!file.isDirectory()) {
                            System.out.println("文件");
                            System.out.println("path=" + file.getPath());
                            System.out.println("absolutepath=" + file.getAbsolutePath());
                            System.out.println("name=" + file.getName());

                    } else if (file.isDirectory()) {
                            System.out.println("文件夹");
                            String[] filelist = file.list();
                            for (int i = 0; i < filelist.length; i++) {
                                    File readfile = new File(filepath + "\\" + filelist[i]);
                                    if (!readfile.isDirectory()) {
                                            System.out.println("path=" + readfile.getPath());
                                            System.out.println("absolutepath="
                                                            + readfile.getAbsolutePath());
                                            System.out.println("name=" + readfile.getName());

                                    } else if (readfile.isDirectory()) {
                                            readfile(filepath + "\\" + filelist[i]);
                                    }
                            }

                    }

            } catch (FileNotFoundException e) {
                    System.out.println("readfile()   Exception:" + e.getMessage());
            }
            return true;
    }

   
    // 复制文件
    public static void copyFile(File sourceFile, File targetFile) throws IOException {
        BufferedInputStream inBuff = null;
        BufferedOutputStream outBuff = null;
        try {
            // 新建文件输入流并对它进行缓冲
            inBuff = new BufferedInputStream(new FileInputStream(sourceFile));

            // 新建文件输出流并对它进行缓冲
            outBuff = new BufferedOutputStream(new FileOutputStream(targetFile));

            // 缓冲数组
            byte[] b = new byte[1024 * 5];
            int len;
            while ((len = inBuff.read(b)) != -1) {
                outBuff.write(b, 0, len);
            }
            // 刷新此缓冲的输出流
            outBuff.flush();
        } finally {
            // 关闭流
            if (inBuff != null)
                inBuff.close();
            if (outBuff != null)
                outBuff.close();
        }
    }

 

}