JAVA文件操作工具类FileUtils_JAVA_编程开发_程序员俱乐部

package org.sg.sgg.file;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import java.util.UUID;

import org.apache.log4j.Logger;

public class FileUtils {
???
??? private final static Logger logger = Logger.getLogger(FileUtils.class);
???
???
???
???
??? /**
??? ?* 判断源文件是否存在且是否为文件
??? ?* @param sourceFile
??? ?* @return
??? ?*/
??? public static boolean isExistsSource(String sourceFile) {
??? ??? File srcFile = new File(sourceFile);
??? ??? if (!srcFile.exists()) {
??? ??? ??? logger.info("复制文件失败：源文件" + sourceFile + "不存在!");
??? ??? ??? return false;
??? ??? } else if (!srcFile.isFile()) {
??? ??? ??? logger.info("复制文件失败：" + sourceFile + "不是一个文件!");
??? ??? ??? return false;
??? ??? }
??? ???
??? ??? return true;
??? }
???
???
??? /**
??? ?* 判断目标文件所在目录是否存在
??? ?* @param targetFile
??? ?* @return
??? ?*/
??? public static boolean isExistsTargetDir(String targetFile) {
??? ??? File destFile = new File(targetFile);
??? ???
??? ??? if (!destFile.getParentFile().exists()) {
??? ??? ??? // 如果目标文件所在的目录不存在，则创建目录
??? ??? ??? logger.info("目标文件所在的目录不存在：" + destFile.getParentFile());
??? ??? ??? //创建目录
??? ??? ??? //destFile.getParentFile().mkdirs();
??? ??? ??? return false;
??? ??? }
??? ???
??? ??? return true;
??? }
??? /**
??? ?* 判断该文件是否存在
??? ?* @param fileName - 文件名称
??? ?* @param path - 目录
??? ?* @return -? 是否存在
??? ?*/
??? public static boolean isFileExist(String fileName, String path){
??? ??? File file = new File(getDoPath(path)+fileName);
??? ??? return file.exists();
??? }

??? /**
??? ?* 复制单个文件
??? ?*
??? ?* @param srcFileName
??? ?*??????????? 待复制的文件名
??? ?* @param destFileName
??? ?*??????????? 目标文件名
??? ?* @return 如果复制成功，则返回true，否则返回false
??? ?*/
??? public static boolean copyFile(String srcFileName, String destFileName) {
??? ??? //源文件是否存在
??? ??? isExistsSource(srcFileName);
??? ??? //目标文件所在目录是否存在
??? ??? isExistsTargetDir(destFileName);
??? ???
??? ??? // 准备复制文件
??? ??? int byteread = 0;// 读取的位数
??? ??? InputStream in = null;
??? ??? OutputStream out = null;
??? ??? File srcFile = new File(srcFileName);
??? ??? File destFile = new File(destFileName);
??? ??? try {
??? ??? ??? // 打开原文件
??? ??? ??? in = new FileInputStream(srcFile);
??? ??? ??? // 打开连接到目标文件的输出流
??? ??? ??? out = new FileOutputStream(destFile);
??? ??? ??? byte[] buffer = new byte[1024];
??? ??? ??? // 一次读取1024个字节，当byteread为-1时表示文件已经读完
??? ??? ??? while ((byteread = in.read(buffer)) != -1) {
??? ??? ??? ??? // 将读取的字节写入输出流
??? ??? ??? ??? out.write(buffer, 0, byteread);
??? ??? ??? }
??? ??? ??? logger.info("复制文件" + srcFileName + "至" + destFileName + "成功!");
??? ??? ???
??? ??? ??? return true;
??? ??? } catch (Exception e) {
??? ??? ??? logger.error("复制文件失败：" + e.getMessage());
??? ??? ??? return false;
??? ??? } finally {
??? ??? ??? // 关闭输入输出流，注意先关闭输出流，再关闭输入流
??? ??? ??? if (out != null) {
??? ??? ??? ??? try {
??? ??? ??? ??? ??? out.close();
??? ??? ??? ??? } catch (IOException e) {
??? ??? ??? ??? ??? logger.error("复制文件关闭流时出错:" + e.getMessage());
??? ??? ??? ??? }
??? ??? ??? }
??? ??? ??? if (in != null) {
??? ??? ??? ??? try {
??? ??? ??? ??? ??? in.close();
??? ??? ??? ??? } catch (IOException e) {
??? ??? ??? ??? ??? logger.error("复制文件关闭流时出错:" + e.getMessage());
??? ??? ??? ??? }
??? ??? ??? }
??? ??? }
??? }
???

??? //==============================================================================
??? //
??? //删除文件夹
??? //??? ??? 此为调用java基础类，利用递归实现方式
??? //??? ??? 除此之外用apache io包FileUtils也很方便，以下为apache io包实现方式：
??? //??? ??? ??? org.apache.commons.io.FileUtils.deleteDirectory(f);//删除目录
??? //??? ??? ??? org.apache.tools.ant.util.FileUtils.delete(f);//删除文件
??? //
??? //==============================================================================
??? /**
??? ?* 删除文件夹：文件夹下的所有文件
??? ?* @param filepath 格式形如：d://1//2/3//4
??? ?* ??? ??? ??? ??? ??? 即为删除4这个文件夹
??? ?* @return
??? ?*/
??? public static boolean removeFile(String filepath) {
??? ??? try {
??? ??? ??? File f = new File(filepath);
??? ??? ??? if(f.exists() && f.isDirectory()) {? //判断是文件还是目录
??? ??? ??? ??? if(f.listFiles().length == 0) {? //若目录下没有文件则直接删除
??? ??? ??? ??? ??? f.delete();
??? ??? ??? ??? } else {? //若有则把文件放进数组，并判断是否有下级目录
??? ??? ??? ??? ??? File childFile[]=f.listFiles();
??? ??? ??? ??? ??? int i = f.listFiles().length;
??? ??? ??? ??? ??? for(int j = 0; j < i; j++) {
??? ??? ??? ??? ??? ??? if(childFile[j].isDirectory()) {
??? ??? ??? ??? ??? ??? ??? //递归调用del方法并取得子目录路径
??? ??? ??? ??? ??? ??? ??? removeFile(childFile[j].getAbsolutePath());?
??? ??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? ??? childFile[j].delete();? //删除文件
??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? //删除文件夹下的子文件后再删除主文件夹
??? ??? ??? ??? ??? f.delete();
??? ??? ??? ??? }
??? ??? ??? }
??? ??? } catch (Exception e) {
??? ??? ??? e.printStackTrace();
??? ??? ??? logger.error("删除文件出错!");
??? ??? ??? return false;
??? ??? }
??? ???
??? ??? return true;
??? }
??? /**
??? ?* 传递一个路径和文件名称，删除该文件
??? ?* @param fileName - 文件名称
??? ?* @param path - 路径
??? ?* @return - 是否删除成功
??? ?*/
??? public static boolean removeFile(String fileName, String path){
??? ??? boolean flag = false;
??? ??? if (isFileExist(fileName, path)) {
??? ??? ??? File file = new File(getDoPath(path)+fileName);
??? ??? ??? flag = file.delete();
??? ??? }
??? ??? return flag;
??? }
??? /**
??? ?* 删除当前文件
??? ?* @param file - 要删除的文件
??? ?* @return 是否删除成功
??? ?*/
??? public static boolean removeFile(File file){
??? ??? ?boolean flag = false;
??? ??????? if (file != null && file.exists()) {
??? ??????????? flag = file.delete();
??? ??????? }
??? ??????? return flag;
??? }
??? /**
??? ?* 传入一个文件名，得到这个文件名称的后缀? 包含 .
??? ?* @param fileName - 文件名
??? ?* @return
??? ?*/
??? public static String getSuffixContainPoint(String fileName){
??? ??? int index = fileName.lastIndexOf(".");
??? ??? if (index != -1) {
??? ??? ??? String suffix = fileName.substring(index);//后缀
??? ??? ??? return suffix;
??? ??? }else {
??? ??? ??? return null;
??? ??? }
??? }
??? /**
??? ?* 传入一个文件名，得到这个文件名称的后缀??? 不包含 .
??? ?* @param fileName - 文件名
??? ?* @return
??? ?*/
??? public static String getSuffixUnContainPoint(String fileName){
??? ??? ?int index = fileName.lastIndexOf(".");
??? ??????? if (index != -1) {
??? ??????????? String suffix = fileName.substring(index + 1);//后缀
??? ??????????? return suffix;
??? ??????? } else {
??? ??????????? return null;
??? ??????? }
??? }
??? /**
??? ?* 利用uuid产生一个随机的name
??? ?* @param fileName 文件名
??? ?* @return
??? ?*/
??? public static String getRandomName(String fileName){
??? ??? ?String randomName = UUID.randomUUID().toString();
??? ??? ?//如果文件没有后缀名? 默认就是给添加 后缀?? txt
??? ??? ?return getNewFileName(fileName, randomName , "txt");
??? }
??? /**
??? ?*? 用当前日期、时间和1000以内的随机数组合成的文件名称
??? ?* @param fileName - 文件名
??? ?* @return
??? ?*/
??? public static String getNumberFileName(String fileName){
??? ??? SimpleDateFormat format = new SimpleDateFormat("yyMMddhhmmss");
??? ??? int rand = new Random().nextInt(1000);
??? ??? String numberFileName = format.format(new Date()) + rand;
??? ??? return getNewFileName(fileName, numberFileName, "txt");
??? }
???
??? /**
??? ?* 传递一个文件名称和一个新名称，组合成一个新的带后缀文件名
??? ?* 当传递的文件名没有后缀，会添加默认的后缀
??? ?* @param fileName - 文件名称
??? ?* @param newFileName - 新文件名称
??? ?* @param nullSuffix - 为没有后缀的文件所添加的后缀 如果没有?? 可传递一个默认的后缀名 eq .txt
??? ?* @return
??? ?*/
??? public static String getNewFileName(String fileName,String newFileName,String nullSuffix){
??? ??? String suffix = getSuffixContainPoint(fileName);
??? ??? if (suffix != null) {
??? ??? ??? newFileName += suffix;
??? ??? }else {
??? ??? ??? newFileName = newFileName.concat(".").concat(nullSuffix);
??? ??? }
??? ??? return newFileName;
??? }
???
???
???
??? /**
??? ?*
??? ?* @param pathName
??? ?* @return
??? ?*/
??? public static boolean isBlankForPath(String pathName) {
??? ??? boolean flag = false;
??? ??? String[] letters = new String[] { "/", "\\", ":", "*", "?", "\"", " <",
??? ??? ??? ??? ">", " |", "%20", "#", "$", "%" };
??? ??? for (int i = 0; i < letters.length; i++) {
??? ??? ??? if (pathName.indexOf(letters[i]) != -1) {
??? ??? ??? ??? flag = true;
??? ??? ??? } else {
??? ??? ??? ??? flag = false;
??? ??? ??? }
??? ??? }
??? ??? return flag;

??? }
??? /**
??? ?* 处理后的系统文件路径
??? ?* @param path
??? ?* @return
??? ?*/
??? public static String getDoPath(String path){
??? ??? ?path = path.replace("\\", "/");
??? ??? ?String lastChar = path.substring(path.length() - 1);
??? ??? ?if (!"/".equals(lastChar)) {
??? ??????????? path += "/";
??? ???? }
??? ??? ?return path;
??? }
??? /**
??? ?* 创建指定的path路径目录
??? ?* @param path - 目录、路径
??? ?* @return
??? ?*/
??? public static boolean mkDir(String path){
??? ??? File file = null;
??? ??? try {??
??? ??? ??? file = new File(path);
??? ??? ??? if (!file.exists()) {??
??????????????? return file.mkdirs();??
??????????? }??
??? ??? }catch (Exception e) {
??? ??? ??? logger.error("创建文件失败..错误如下：");
??? ??? ??? e.printStackTrace();
??? ??? }finally{
??? ??? ??? ?file = null;??
??? ??? }
??? ??? return false;??
??? }
???
???
}