操作文件，文件夹工具类

/**
 * 
 */
package org.quetzaco.commoncomponents.global.util;

/**
 * @author tony
 *
 */

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;
public class FileUtil {

    /**
     * 读取文本文件内容
     * @param filePathAndName 带有完整绝对路径的文件名
     * @param encoding 文本文件打开的编码方式
     * @return 返回文本文件的内容
     */
    public static String readTxt(String filePathAndName,String encoding) throws IOException{
        encoding = encoding.trim();
        StringBuffer str = new StringBuffer("");
        String st = "";
        try{
            FileInputStream fs = new FileInputStream(filePathAndName);
            InputStreamReader isr;
            if(encoding.equals("")){
                isr = new InputStreamReader(fs);
            }else{
                isr = new InputStreamReader(fs,encoding);
            }
            BufferedReader br = new BufferedReader(isr);
            try{
                String data = "";
                while((data = br.readLine())!=null){
                    str.append(data+" ");
                }
            }catch(Exception e){
                str.append(e.toString());
            }
            st = str.toString();
        }catch(IOException es){
            st = "";
        }
        return st;     
    }

    /**
     * 新建目录
     * @param folderPath 目录
     * @return 返回目录创建后的路径
     */
    public static String createFolder(String folderPath) {
        String txt = folderPath;
        try {
            java.io.File myFilePath = new java.io.File(txt);
            txt = folderPath;
            if (!myFilePath.exists()) {
                myFilePath.mkdir();
            }
        }
        catch (Exception e) {
            QuetzacoServerLogger.getInstance().error(e);
        }
        return txt;
    }

    /**
     * 多级目录创建
     * @param folderPath 准备要在本级目录下创建新目录的目录路径 例如 c:myf
     * @param paths 无限级目录参数，各级目录以单数线区分 例如 a|b|c
     * @return 返回创建文件后的路径 例如 c:myfac
     */
    public static String createFolders(String folderPath, String paths){
        String txts = folderPath;
        try{
            String txt;
            txts = folderPath;
            StringTokenizer st = new StringTokenizer(paths,"|");
            for(int i=0; st.hasMoreTokens(); i++){
                txt = st.nextToken().trim();
                if(txts.lastIndexOf("/")!=-1){
                    txts = createFolder(txts+txt);
                }else{
                    txts = createFolder(txts+txt+"/");   
                }
            }
        }catch(Exception e){
            QuetzacoServerLogger.getInstance().error(e);
        }
        return txts;
    }


    /**
     * 新建文件
     * @param filePathAndName 文本文件完整绝对路径及文件名
     * @param fileContent 文本文件内容
     * @return
     */
    public static void createFile(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);
            myFile.close();
            resultFile.close();
        }
        catch (Exception e) {
            QuetzacoServerLogger.getInstance().error(e);
        }
    }


    /**
     * 有编码方式的文件创建
     * @param filePathAndName 文本文件完整绝对路径及文件名
     * @param fileContent 文本文件内容
     * @param encoding 编码方式 例如 GBK 或者 UTF-8
     * @return
     */
    public static void createFile(String filePathAndName, String fileContent, String encoding) {

        try {
            String filePath = filePathAndName;
            filePath = filePath.toString();
            File myFilePath = new File(filePath);
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
            }
            PrintWriter myFile = new PrintWriter(myFilePath,encoding);
            String strContent = fileContent;
            myFile.println(strContent);
            myFile.close();
        }
        catch (Exception e) {
            QuetzacoServerLogger.getInstance().error(e);
        }
    }


    /**
     * 删除文件
     * @param filePathAndName 文本文件完整绝对路径及文件名
     * @return Boolean 成功删除返回true遭遇异常返回false
     */
    public static boolean delFile(String filePathAndName) {
        boolean bea = false;
        try {
            String filePath = filePathAndName;
            File myDelFile = new File(filePath);
            if(myDelFile.exists()){
                myDelFile.delete();
                bea = true;
            }else{
                bea = false;
            }
        }
        catch (Exception e) {
            QuetzacoServerLogger.getInstance().error(e);
        }
        return bea;
    }



    /**
     * 删除文件夹
     * @param folderPath 文件夹完整绝对路径
     * @return
     */
    public static 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) {
            QuetzacoServerLogger.getInstance().error(e);
        }
    }


    /**
     * 删除指定文件夹下所有文件
     * @param path 文件夹完整绝对路径
     * @return
     * @return
     */
    public static boolean delAllFile(String path) {
        boolean bea = false;
        File file = new File(path);
        if (!file.exists()) {
            return bea;
        }
        if (!file.isDirectory()) {
            return bea;
        }
        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
                bea = true;
            }
        }
        return bea;
    }


    /**
     * 复制单个文件
     * @param oldPathFile 准备复制的文件源
     * @param newPathFile 拷贝到新绝对路径带文件名
     * @return
     */
    public static void copyFile(String oldPathFile, String newPathFile) {
        try {
            int bytesum = 0;
            int byteread = 0;
            File oldfile = new File(oldPathFile);
            if (oldfile.exists()) { //文件存在时
                new File(newPathFile).delete();  //覆盖
                InputStream inStream = new FileInputStream(oldPathFile); //读入原文件
                FileOutputStream fs = new FileOutputStream(newPathFile);
                byte[] buffer = new byte[1444];
                while((byteread = inStream.read(buffer)) != -1){
                    bytesum += byteread; //字节数 文件大小
                    fs.write(buffer, 0, byteread);
                }
                inStream.close();
                fs.close();
            }
        }catch (Exception e) {
            e.printStackTrace();
            QuetzacoServerLogger.getInstance().error(e);
        }
    }


    /**
     * 复制整个文件夹的内容
     * @param oldPath 准备拷贝的目录
     * @param newPath 指定绝对路径的新目录
     * @return
     */
    public static 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("/")){
                    temp=new File(oldPath+file[i]);
                }else{
                    temp=new File(oldPath+"/"+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) {
            QuetzacoServerLogger.getInstance().error(e);
        }
    }


    /**
     * 移动文件
     * @param oldPath
     * @param newPath
     * @return
     */
    public static void moveFile(String oldPath, String newPath) {
        copyFile(oldPath, newPath);
        delFile(oldPath);
    }


    /**
     * 移动目录
     * @param oldPath
     * @param newPath
     * @return
     */
    public static void moveFolder(String oldPath, String newPath) {
        copyFolder(oldPath, newPath);
        delFolder(oldPath);
    }

    public static String getExtension(String filename){
        String[] extension = new File(filename).getName().split("\.");
        String type;
        if(extension.length>=2){
            type = extension[extension.length-1].trim();
        }else{
            type = "";
        }
        return type;
    }

    public static int getFileCount(String path,FilenameFilter filter){
        File folder = new File(path);
        if(!folder.exists()||!folder.isDirectory()) return -1;
        
        File[] list;
        if(filter==null){
            list = folder.listFiles();
        }else{
            list = folder.listFiles(filter);
        }
        if(list==null) {
            return -1;
        }else{
            return list.length;
        }
    }
    
}