文件目录操作

import java.io.*;

public class FileUtil {
   public FileUtil() {
   }

   /**
     * 新建目录
     * @param folderPath String 如 c:/fqf
     * @return boolean
     */
   public void newFolder(String folderPath) {
       try {
           String filePath = folderPath;
           filePath = filePath.toString();
           java.io.File myFilePath = new java.io.File(filePath);
           if (!myFilePath.exists()) {
               myFilePath.mkdir();
           }
       }
       catch (Exception e) {
           System.out.println("新建目录操作出错");
           e.printStackTrace();
       }
   }

   /**
     * 新建文件
     * @param filePathAndName String 文件路径及名称 如c:/fqf.txt
     * @param fileContent String 文件内容
     * @return boolean
     */
   public void newFile(String filePathAndName, String fileContent) {

       try {
           String filePath = filePathAndName;
           filePath = filePath.toString();
           File myFilePath = new File(filePath);
           if (!myFilePath.exists()) {
               myFilePath.createNewFile();
           }
           FileWriter resultFile = new FileWriter(myFilePath);
           PrintWriter myFile = new PrintWriter(resultFile);
           String strContent = fileContent;
           myFile.println(strContent);
           resultFile.close();

       }
       catch (Exception e) {
           System.out.println("新建文件操作出错");
           e.printStackTrace();

       }

   }

   /**
     * 删除文件
     * @param filePathAndName String 文件路径及名称 如c:/fqf.txt
     * @param fileContent String
     * @return boolean
     */
   public void delFile(String filePathAndName) {
       try {
           String filePath = filePathAndName;
           filePath = filePath.toString();
           java.io.File myDelFile = new java.io.File(filePath);
           myDelFile.delete();

       }
       catch (Exception e) {
           System.out.println("删除文件操作出错");
           e.printStackTrace();

       }

   }

   /**
     * 删除文件夹
     * @param filePathAndName String 文件夹路径及名称 如c:/fqf
     * @param fileContent String
     * @return boolean
     */
   public void delFolder(String folderPath) {
       try {
           delAllFile(folderPath); //删除完里面所有内容
           String filePath = folderPath;
           filePath = filePath.toString();
           java.io.File myFilePath = new java.io.File(filePath);
           myFilePath.delete(); //删除空文件夹

       }
       catch (Exception e) {
           System.out.println("删除文件夹操作出错");
           e.printStackTrace();

       }

   }

   /**
     * 删除文件夹里面的所有文件
     * @param path String 文件夹路径 如 c:/fqf
     */
   public void delAllFile(String path) {
       File file = new File(path);
       if (!file.exists()) {
           return;
       }
       if (!file.isDirectory()) {
           return;
       }
       String[] tempList = file.list();
       File temp = null;
       for (int i = 0; i < tempList.length; i++) {
           if (path.endsWith(File.separator)) {
               temp = new File(path + tempList[i]);
           }
           else {
               temp = new File(path + File.separator + tempList[i]);
           }
           if (temp.isFile()) {
               temp.delete();
           }
           if (temp.isDirectory()) {
               delAllFile(path+"/"+ tempList[i]);//先删除文件夹里面的文件
               delFolder(path+"/"+ tempList[i]);//再删除空文件夹
           }
       }
   }

   /**
     * 复制单个文件
     * @param oldPath String 原文件路径 如：c:/fqf.txt
     * @param newPath String 复制后路径 如：f:/fqf.txt
     * @return boolean
     */
   public void copyFile(String oldPath, String newPath) {
       try {
           int bytesum = 0;
           int byteread = 0;
           File oldfile = new File(oldPath);
           if (oldfile.exists()) { //文件存在时
               InputStream inStream = new FileInputStream(oldPath); //读入原文件
               FileOutputStream fs = new FileOutputStream(newPath);
               byte[] buffer = new byte[1444];
               int length;
               while ( (byteread = inStream.read(buffer)) != -1) {
                   bytesum += byteread; //字节数 文件大小
                   fs.write(buffer, 0, byteread);
               }
               inStream.close();
           }
       }
       catch (Exception e) {
           System.out.println("复制单个文件操作出错");
           e.printStackTrace();

       }

   }

   /**
     * 复制整个文件夹内容
     * @param oldPath String 原文件路径 如：c:/fqf
     * @param newPath String 复制后路径 如：f:/fqf/ff
     * @return boolean
     */
   public void copyFolder(String oldPath, String newPath) {

       try {
           (new File(newPath)).mkdirs(); //如果文件夹不存在 则建立新文件夹
           File a=new File(oldPath);
           String[] file=a.list();
           File temp=null;
           for (int i = 0; i < file.length; i++) {
               if(oldPath.endsWith(File.separator)){
                   temp=new File(oldPath+file[i]);
               }
               else{
                   temp=new File(oldPath+File.separator+file[i]);
               }

               if(temp.isFile()){
                   FileInputStream input = new FileInputStream(temp);
                   FileOutputStream output = new FileOutputStream(newPath + "/" +
                           (temp.getName()).toString());
                   byte[] b = new byte[1024 * 5];
                   int len;
                   while ( (len = input.read(b)) != -1) {
                       output.write(b, 0, len);
                   }
                   output.flush();
                   output.close();
                   input.close();
               }
               if(temp.isDirectory()){//如果是子文件夹
                   copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);
               }
           }
       }
       catch (Exception e) {
           System.out.println("复制整个文件夹内容操作出错");
           e.printStackTrace();

       }

   }

   /**
     * 移动文件到指定目录
     * @param oldPath String 如：c:/fqf.txt
     * @param newPath String 如：d:/fqf.txt
     */
   public void moveFile(String oldPath, String newPath) {
       copyFile(oldPath, newPath);
       delFile(oldPath);

   }

   /**
     * 移动文件夹到指定目录
     * @param oldPath String 如：c:/fqf.txt
     * @param newPath String 如：d:/fqf.txt
     */
   public void moveFolder(String oldPath, String newPath) {
       copyFolder(oldPath, newPath);
       delFolder(oldPath);

   }
}