写了个Java操作文件的简单例子，希望给需要帮助的兄弟提供点儿帮助，同时也希望大家给予批评指正。
文件操作类，代码如下：
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

public class FileTools {
 private static final String SPECIAL_FILE_STYLE_PICTURECACHE = "Thumbs.db";
 public static final Logger logger = LogManager.getLogger(FileTools.class);
 
 public FileTools()
 {
  
 }
 /*
  * @discription:Delete a folder
  * @param:dirPath String
  * @return boolean
  */
 public static boolean deleteDirectory(String dirPath,boolean deteDirRoot)
 {
  File parentFile = new File(dirPath);
  File[] chirenFile = null;
  if(parentFile.exists() && parentFile.isDirectory())
  {
    chirenFile = parentFile.listFiles();
    for (int i = 0; i < chirenFile.length; i++) {
     if(!chirenFile[i].isDirectory())
     {
      chirenFile[i].delete();
     }
     else
     {
      deleteDirectory(chirenFile[i].getAbsolutePath(),true);     
      chirenFile[i].delete();
     }
    }
    if(deteDirRoot)
    {
     parentFile.delete();
    }
    
    return true;  
  }
  else
  {
   FileTools.logger.error("The Floder Is Not Exist!");
   return false;
  }
 }
 
 /*
  * @discription:Copy Folder
  * @param:sourceFilePath String,targetFilePath String
  * @return boolean
  */
 public static boolean copyDirectory(String sourceFilePath,String targetFilePath) throws IOException
 {
  File sourceFile = new File(sourceFilePath);
  File targetFile = new File(targetFilePath);
  
  if(!targetFile.exists())
  {
   targetFile.mkdir();
  }
  
  File[] sourceChirenFile = null;
  FileInputStream fileInputStream = null;
  FileOutputStream fileOutputStream = null;
  FileTools.logger.debug("Copy "+sourceFile.getName()+" Floder Start......");
  if(sourceFile.exists() && sourceFile.isDirectory())
  {
   sourceChirenFile = sourceFile.listFiles();
   for (int i = 0; i < sourceChirenFile.length; i++) {
    File tempFile = null;
    
    if(!sourceFilePath.endsWith(File.separator))
    {
     tempFile = new File(targetFilePath+File.separator+sourceChirenFile[i].getName());
    }
    else
    {
     tempFile = new File(targetFilePath+sourceChirenFile[i].getName());
    }
    if(!FileTools.SPECIAL_FILE_STYLE_PICTURECACHE.equalsIgnoreCase(sourceChirenFile[i].getName()))
    {
     if(!sourceChirenFile[i].isDirectory())
     {
      fileInputStream = new FileInputStream(sourceChirenFile[i]);
      fileOutputStream = new FileOutputStream(tempFile);
      byte[] b = new byte[1024];
      FileTools.logger.debug("Copy "+sourceChirenFile[i].getName()+" File Start......");
         while(fileInputStream.read(b)!=-1)
         {
          fileOutputStream.write(b);
         }
         FileTools.logger.debug("Copy "+sourceChirenFile[i].getName()+"  File End!");
         fileInputStream.close();
         fileOutputStream.close(); 
     }
     else
     {
      copyDirectory(sourceFilePath+File.separator+sourceChirenFile[i].getName(),
              targetFilePath+File.separator+sourceChirenFile[i].getName());
     }
    }
    
   }
   FileTools.logger.debug("Copy "+sourceFile.getName()+" Floder End!");
   return true;
  }
  else
  {
   FileTools.logger.error("The Floder Is Not Exist!");
   return false;
  }
 }
}
Junit测试类

import java.io.IOException;

import org.coolyongzi.FileTools;

import junit.framework.TestCase;

public class FileToolsTest extends TestCase {

 protected void setUp() throws Exception {
  super.setUp();
 }

 protected void tearDown() throws Exception {
  super.tearDown();
 }

 public void testDeleteDirectory()
 {
  FileTools.deleteDirectory("F:/复件 图片",false);
 }
 
 public void testCopyDirectory()
 {
  try {
   FileTools.copyDirectory("F:/Game","F:/Game1");
  } catch (IOException e) {
   e.printStackTrace();
  }
 }
}