java File文件解压,压缩,大小,拷贝,删除,解密,加密

package com.app.common;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

import org.dom4j.Document;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;


/**
 * @Author:jilongliang
 * @Project:JTool
 * @Class:FileUtil.java
 * @Description:文件处理类
 */
@SuppressWarnings("all")
public class FileUtil {
	static BASE64Encoder encoder = new  BASE64Encoder();// 加密
	static BASE64Decoder decoder = new  BASE64Decoder();// 解密
	private static List fileList = new ArrayList();
	private static File tempFile = null;
	private static final long KB = 1024;// KB
	private static final long MB = KB * KB;// MB
	private static final long GB = KB * MB;// GB
	private static final int byt = 2048; 
	/**
	 * 处理文件大小
	 */
	public static String fileSize(long file) {
		if (file <= 0) {
			return "";
		} else if (file < MB) {
			BigDecimal b = new BigDecimal((double) file / KB);
			return b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue() + "K";
		} else if (file < GB) {
			BigDecimal b = new BigDecimal((double) file / MB);
			return b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue() + "M";
		} else {
			BigDecimal b = new BigDecimal((double) file / GB);
			return b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue() + "G";
		}
	}

	/**
	 * 获取当前工程路径
	 * 
	 * @return
	 */
	public static String getSysPath() {
		// String path =
		// Thread.currentThread().getContextClassLoader().getResource("").toString();
		String path = Thread.currentThread().getContextClassLoader()
				.getResource(".").toString();
		String temp = path.replaceFirst("file:/", "").replaceFirst(
				"WEB-INF/classes/", "");
		String separator = System.getProperty("file.separator");
		String resultPath = temp.replaceAll("/", separator + separator);
		return resultPath;
	}

	/**
	 * Thread.currentThread().getContextClassLoader().getResource("")
	 * 的getResource里面空串或者点或者是/输出的路径是一致 "" D:\Eclipse3.7\JTool\build\classes\ .
	 * D:\Eclipse3.7\JTool\build\classes\ 
	 * -/ D:\Eclipse3.7\JTool\build\classes\
	 * 
	 * @return
	 */
	public static String getClassPath() {
		// String path =
		// Thread.currentThread().getContextClassLoader().getResource("").toString();
		// String path
		// =Thread.currentThread().getContextClassLoader().getResource(".").toString();
		String path = Thread.currentThread().getContextClassLoader()
				.getResource(".").toString();
		String temp = path.replaceFirst("file:/", "");
		String separator = System.getProperty("file.separator");
		String resultPath = temp.replaceAll("/", separator + separator);
		return resultPath;
	}

	/**
	 * getClassLoader().getResource()方法参数空串和点都是输出相同的路径唯有/是报空指针 ""
	 * D:\Eclipse3.7\JTool\build\classes\ 
	 * . D:\Eclipse3.7\JTool\build\classes\
	 * -/ 报空指针
	 * 
	 * @return
	 */
	private String getClassesAbsolutePath() {
		// 得到的是 项目的绝对路径
		String path = this.getClass().getClassLoader().getResource("")
				.getPath();
		// String
		// path=this.getClass().getClassLoader().getResource(".").getPath();
		// String
		// path=this.getClass().getClassLoader().getResource("/").getPath();//报空指针
		String temp = path.replaceFirst("/", "");
		String separator = System.getProperty("file.separator");
		String resultPath = temp.replaceAll("/", separator + separator);
		return resultPath;
	}

	/**
	 *得到的是当前类 文件的URI目录,不包括自己
	 * ""D:\Eclipse3.7\JTool\build\classes\javax\org\path\ .
	 * D:\Eclipse3.7\JTool\build\classes\javax\org\path\ - /
	 * D:\Eclipse3.7\JTool\build\classes\
	 * @return
	 */
	private String getCurrentClassPath() {
		// String path=this.getClass().getResource("").getPath();
		// String path=this.getClass().getResource(".").getPath();
		String path = this.getClass().getResource("/").getPath();
		String temp = path.replaceFirst("/", "");
		String separator = System.getProperty("file.separator");
		String resultPath = temp.replaceAll("/", separator + separator);
		return resultPath;
	}

	/**
	 * 删除目录下的所有子目录和文件
	 * 
	 * @param filepath
	 * @throws IOException
	 */
	protected static void deleteDirs(String filepath) throws IOException {
		File f = new File(filepath);// 定义文件路径
		if (f.exists()) {// 判断是否存在
			if (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();// 删除目录
				} else {// 若有则把文件放进数组，并判断是否有下级目录
					File delFile[] = f.listFiles();
					int i = f.listFiles().length;
					for (int j = 0; j < i; j++) {
						if (delFile[j].isDirectory()) {
							deleteDirs(delFile[j].getAbsolutePath());// 递归调用delDirs方法并取得子目录路径
						} else {
							delFile[j].delete();// 删除文件
						}
					}
					f.delete();// 删除目录
				}
			} else {
				f.delete();// 删除文件
			}
		}
	}

	/**
	 * 直接过滤图片所有格式的重命名文件里面的名称
	 * 
	 * @param fileDir
	 * @param sequenceCode
	 */
	public static void fileRename(File fileDir, String sequenceCode) {
		File[] files = fileDir.listFiles();
		for (int k = 0; k < files.length; k++) {
			StringBuffer sb = new StringBuffer(sequenceCode);
			if (files[k].isDirectory()) {
				fileRename(files[k], sequenceCode);
			} else {
				if (k < 10)
					sb.append("_000").append(k);
				else if (k >= 10 && k < 100)
					sb.append("_00").append(k);
				else if (k < 1000 && k >= 100)
					sb.append("_0").append(k);
				else
					sb.append("_").append(k);
				final int index = files[k].getName().lastIndexOf(".") + 1;
				final String fileType = files[k].getName().substring(index);
				sb.append(".").append(fileType);
				final String name = sb.toString();
				final File dirFile = new File(fileDir, name);
				System.out.println("Rename File Path:"
						+ files[k].getAbsolutePath());
				files[k].renameTo(dirFile);
			}
		}
	}

	/**
	 * 根据后缀条件过滤
	 * 
	 * @param fileDir
	 * @param sequenceCode
	 */
	public static void fileFilterRenames(File fileDir, String sequenceCode) {
		File[] files = fileDir.listFiles(fileFilter);
		for (int k = 0; k < files.length; k++) {
			StringBuffer sb = new StringBuffer(sequenceCode);
			if (files[k].isDirectory()) {
				fileRename(files[k], sequenceCode);
			} else {
				if (k < 10)
					sb.append("_000").append(k);
				else if (k >= 10 && k < 100)
					sb.append("_00").append(k);
				else if (k < 1000 && k >= 100)
					sb.append("_0").append(k);
				else
					sb.append("_").append(k);
				final int index = files[k].getName().lastIndexOf(".") + 1;
				final String fileType = files[k].getName().substring(index);
				sb.append(".").append(fileType);
				final String name = sb.toString();
				final File dirFile = new File(fileDir, name);
				System.out.println("重命名的文件: :" + files[k].getAbsolutePath());
				files[k].renameTo(dirFile);
			}
		}
	}

	/**
	 * 读取文件里面的所有文件
	 * 
	 * @param filePath
	 */
	public static void fileList(String filePath) {
		File srcFile = new File(filePath);
		boolean flag = srcFile.exists();
		/**
		 * @flag判断文件是否存在
		 * @isDirectory测试此抽象路径名表示的文件是否是一个目录
		 * @canWrite测试应用程序是否可以读取此抽象路径名表示的文件
		 */
		if (!flag || !srcFile.isDirectory() || !srcFile.canRead()) {
			try {
				srcFile.createNewFile();
			} catch (IOException e) {
				e.printStackTrace();
			}
		} else {
			File[] file = srcFile.listFiles();
			for (int i = 0; i < file.length; i++) {
				System.out.println(file[i].getAbsolutePath());
			}
		}
	}

	/**
	 * 以数组形式列出所有文件包括子类的文件
	 * 
	 * @param path
	 */
	public static List findFiles(String path) {
		try {
			File file = new File(path);
			File[] files = file.listFiles();
			String[] filenames = file.list();
			if (filenames == null)
				return fileList;
			for (int i = 0; i < filenames.length; i++) {
				if (files[i].isFile()) {
					fileList.add(files[i].getPath());
				} else if (files[i].isDirectory()) {
					findFiles(files[i].getPath());
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return fileList;
	}
	/**
	 * 压缩文件
	 * @param path压缩文件的路径
	 * @param toDir指定压缩文件到那个目录磁盘下
	 */
	public static void compressionZip(String path,String toDir) {
		File f = new File(path);
		try {
			InputStream fis = new FileInputStream(f);
			InputStream bis = new BufferedInputStream(fis);
			byte[] buf = new byte[1024*1024];
			int index= f.getName().lastIndexOf("\\")+1;
			String fileName=f.getName().substring(index);
			if(fileName.matches(".*\\.(?i)gif")){ //匹配gif格式文件
				fileName=fileName.replaceAll(".gif", "");
			}else if(fileName.matches(".*\\.(?i)java")){//匹配.java文件
				fileName=fileName.replaceAll(".java", "");
			}
			int len;
			OutputStream fos = new FileOutputStream(toDir+ fileName + ".zip");
			BufferedOutputStream bos = new BufferedOutputStream(fos);
			ZipOutputStream zos = new ZipOutputStream(bos);// 压缩包
			ZipEntry ze = new ZipEntry(f.getName());// 这是压缩包名里的文件名
			zos.putNextEntry(ze);// 写入新的 ZIP 文件条目并将流定位到条目数据的开始处
			while ((len = bis.read(buf)) != -1) {
				zos.write(buf, 0, len);
				zos.flush();
			}
			bis.close();
			zos.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	/**
	 * 解压zip文件
	 * @param path解压文件路径
	 * @param flag标识
	 */
	public static void decompressZip(String path,boolean flag) 
	{
		int count = -1;
		int index = -1;
		String savePath = "";
		savePath = path.substring(0, path.lastIndexOf("\\")) + "\\";
		try 
		{
			BufferedOutputStream bos = null;
			ZipEntry entry = null;
			InputStream fis = new FileInputStream(path); 
			ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
			while((entry = zis.getNextEntry()) != null) 
			{
				byte data[] = new byte[byt]; 
				String temp = entry.getName();
				flag = fileFilter(temp);
				if(!flag)
					continue;
				index = temp.lastIndexOf("/");
				if(index > -1)
					temp =  temp.substring(index+1);
					temp=savePath+temp;
				File f = new File(temp);
				if(!f.exists()){//不存在就创建一个新的文件
					f.createNewFile();
					//f.mkdirs();
				}
				OutputStream fos = new FileOutputStream(f);
				bos = new BufferedOutputStream(fos, byt);
				while((count = zis.read(data, 0, byt)) != -1) 
				{
					bos.write(data, 0, count);
				}
				bos.flush();//flush缓冲区
				fos.flush();
				bos.close();
				fos.close();
				fis.close();
				
			}
			zis.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	/**
	 * 
	 * @param zip压缩文件文件路径
	 * @param zipName压缩文件里面的文件名称
	 * @param srcFiles多文件
	 * @throws IOException
	 */
	public static void ZipFiles(File zip, String zipName, File... srcFiles)
			throws IOException {
		ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zip));
		ZipFiles(out, zipName, srcFiles);
		out.close();
		System.out.println("*****************压缩完毕*******************");
	}

	/**
	 * 压缩文件-File
	 * 
	 * @param zipFile
	 *            zip文件
	 * @param srcFiles
	 *            被压缩源文件
	 * @author isea533
	 */
	public static void ZipFiles(ZipOutputStream zis, String path,
			File... srcFiles) {
		path = path.replaceAll("\\*", "/");
		if (!path.endsWith("/")) {
			path += "/";
		}
		byte[] buf = new byte[1024];
		try {
			for (int i = 0; i < srcFiles.length; i++) {
				if (srcFiles[i].isDirectory()) {
					File[] files = srcFiles[i].listFiles();
					String srcPath = srcFiles[i].getName();
					srcPath = srcPath.replaceAll("\\*", "/");
					if (!srcPath.endsWith("/")) {
						srcPath += "/";
					}
					zis.putNextEntry(new ZipEntry(path + srcPath));
					ZipFiles(zis, path + srcPath, files);
				} else {
					FileInputStream in = new FileInputStream(srcFiles[i]);
					System.out.println(path + srcFiles[i].getName());
					zis.putNextEntry(new ZipEntry(path
									+ srcFiles[i].getName()));
					int len;
					while ((len = in.read(buf)) > 0) {
						zis.write(buf, 0, len);
					}
					zis.closeEntry();
					in.close();
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	/**
	 * 
	 * @param zipPath
	 * @param descDir
	 * @throws IOException
	 */
	public static void unZipFiles(String zipPath, String descDir)
			throws IOException {
		unZipFiles(new File(zipPath), descDir);
	}

	/**
	 * 解压文件到指定目录
	 * @param zipFile
	 * @param descDir
	 * @author isea533
	 */
	public static void unZipFiles(File zipFile, String descDir)
			throws IOException {
		File pathFile = new File(descDir);
		if (!pathFile.exists()) {
			pathFile.mkdirs();
		}
		ZipFile zip = new ZipFile(zipFile);
		for (Enumeration entries = zip.entries(); entries.hasMoreElements();) {
			ZipEntry entry = (ZipEntry) entries.nextElement();
			String zipEntryName = entry.getName();
			InputStream in = zip.getInputStream(entry);
			String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
			// 判断路径是否存在,不存在则创建文件路径
			File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
			if (!file.exists()) {
				file.mkdirs();
			}
			// 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
			if (new File(outPath).isDirectory()) {
				continue;
			}
			// 输出文件路径信息
			System.out.println(outPath);

			OutputStream out = new FileOutputStream(outPath);
			byte[] buf1 = new byte[1024];
			int len;
			while ((len = in.read(buf1)) > 0) {
				out.write(buf1, 0, len);
			}
			in.close();
			out.close();
		}
		System.out.println("******************解压完毕********************");
	}
	/**
	 * 以数组形式存放图片,只拿jpg格式的
	 * 
	 * @param dirName
	 * @return
	 */
	public static List readDirFiles(String dirName) {// dirName目录全路径
		try {
			File file = new File(dirName);
			File[] files = file.listFiles();
			for (int i = 0; i < files.length; i++) {
				File tempFile = files[i];
				if (tempFile.isDirectory()) {
					String path = tempFile.getPath();
					List list = readDirFiles(path);// 递归
					for (int j = 0; j < list.size(); j++) {
						fileList.add(list.get(j));
					}
				} else {
					String fileName = tempFile.getName();
					if (!tempFile.isFile()) {
						continue;
					}
					// 判断是jpg格式的就添加进去
					if (files[i].getName().endsWith(".gif")) {
						fileList.add(tempFile);
					}
				}
				if (i == (files.length - 1)) {
					return fileList;
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return fileList;
	}

	/**
	 * 创建文件并且拷贝文件
	 * 
	 * @param dirFrom从那个文件里面拷贝
	 * @param dirTo拷贝到那个文件里面
	 */
	public static void copyFiles(File dirFrom, File dirTo) {
		File[] files = dirFrom.listFiles();
		for (File f : files) {
			String tempFrom = f.getAbsolutePath();
			String tempTo = tempFrom.replace(dirFrom.getAbsolutePath(), dirTo
					.getAbsolutePath()); // 后面的路径 替换前面的路径名
			if (f.isDirectory()) {
				tempFile = new File(tempTo);
				if (!tempFile.exists()) {
					tempFile.mkdirs();
				} else {
					copyFiles(dirFrom, dirTo);
				}
			} else {
				System.out.println("源文件:" + f.getAbsolutePath());
				int index = tempTo.lastIndexOf("\\");// 找到"/"所在的位置
				String mkdirPath = tempTo.substring(0, index);
				tempFile = new File(mkdirPath);
				if (!tempFile.exists()) {
					tempFile.mkdirs();
				} else {
					System.out.println("目标点:" + tempTo);
					readFiles(tempFrom, tempTo);
				}
			}
		}
	}

	/**
	 * 拷贝方法
	 * 
	 * @param from从那个路径
	 * @param to到那个路径
	 */
	public static void readFiles(String from, String to) {
		try {
			InputStream in = new FileInputStream(from);
			OutputStream out = new FileOutputStream(to);
			byte[] buff = new byte[1024 * 1024];
			int len = 0;
			while ((len = in.read(buff)) != -1) {
				out.write(buff, 0, len);
			}
			in.close();
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 加密文件
	 * 
	 * @param f
	 * @param path
	 */
	private static String encryptFile(File f, String path) {
		InputStream in = null;
		OutputStream out = null;
		String key = "";
		try {
			f = new File(path);
			in = new FileInputStream(f);
			out = new ByteArrayOutputStream();
			// System.out.println(f.getAbsolutePath());
			// System.out.println(f.length());
			encoder.encodeBuffer(in, out);
			key = out.toString();
			in.close();
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return key;
	}
	/**
	 * 解密文件
	 * 
	 * @param f
	 * @param path
	 */
	private static String dencryptFile(File f, String path) {
		InputStream in = null;
		OutputStream out = null;
		String key = "";
		try {
			f = new File(path);
			in = new FileInputStream(f);
			out = new ByteArrayOutputStream();
			decoder.decodeBuffer(in, out);
			key = out.toString();
			in.close();
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return key;
	}

	/**
	 * 加密
	 * 
	 * @param key
	 * @return
	 * @throws Exception
	 */
	public static String encryptBASE64(String inputStr) {
		String value = "";
		try {
			byte[] key = inputStr.getBytes();
			value = encoder.encodeBuffer(key);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return value;
	}

	/**
	 * 解密
	 * 
	 * @param key
	 * @return
	 * @throws Exception
	 */
	public static String decryptBASE64(String outputStr) {
		String value = "";
		try {
			byte[] key = decoder.decodeBuffer(outputStr);
			value = new String(key);
		} catch (Exception e) {
		}
		return value;
	}
	/**
	 * xml格式化
	 * @param document
	 * @param filePath
	 * @return
	 */
	private static boolean format(Document document, String filePath) {
		boolean ret=true;
		OutputFormat format = OutputFormat.createPrettyPrint();// 格式
		format.setEncoding("utf-8");// 设置格式编码
		try {
			/** 将document中的内容写入文件中new XMLWriter(new FileWriter(new File(filename))); */
			XMLWriter writer = new XMLWriter(new FileWriter(new File(filePath)),
					format);
			writer.write(document);
			writer.close();
		} catch (IOException e) {
			e.printStackTrace();
			ret=false;
		}
		return ret;
	}
	/**
	 * 文件处理
	 * @param content
	 * @param htmlPath
	 * @return
	 */
	public static boolean write(String content, String htmlPath) {  
        boolean flag = true;  
        try {  
            Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(htmlPath), "UTF-8"));  
            out.write("\n" + content);  
            out.close();  
        } catch (FileNotFoundException ex) {  
            ex.printStackTrace();  
            return false;  
        } catch (UnsupportedEncodingException ex) {  
            ex.printStackTrace();  
            return false;  
        } catch (IOException ex) {  
            ex.printStackTrace();  
            return false;  
        }  
        return flag;  
    }  
	/**
	 * 过滤器
	 */
	private static FileFilter fileFilter = new FileFilter() {
		@Override
		public boolean accept(File fileName) {
			String f = fileName.getName();
			if (f.endsWith(".png") || f.endsWith(".gif")) {
				return true;
			}
			return false;
		}
	};
	/**
	 * 文件过滤
	 * @param filName
	 * @return
	 */
	public static boolean fileFilter(String filName)
	{
		if(filName.endsWith(".jpg") || filName.endsWith(".gif")  || filName.endsWith(".bmp") || filName.endsWith(".png"))
		{
			return false;
		}else{
			return true;
		}
	}
	 

	public static void main(String[] args) throws Exception {
		
		String path1 = "D:/test/qq";
		File fromFile = new File(path1);// 源文件夹
		fileRename(fromFile, "I_");
		/*
		String path1 = "C:\\QQ\\1030927759\\Image";
		String path2 = "d:\\t\\b";
		String path3 = "d:\\t\\c";
		File fromFile = new File(path1);// 源文件夹
		File toFile = new File(path2);// 目标
		compressionZip(path2+"\\a.gif","D:\\t\\");
		// copyFiles(fromFile, toFile);

		// fileFilterRenames(fromFile, "s");

		//fileRename(fromFile, "f");

		// deleteDirs(path1);

		// fileList(path2);

		
		 * List list=readDirFiles(path2); for (Object object : list) {
		 * System.out.println("image:"+object); }
		 * 
		 * List list=findFiles(path2); for (Iterator iterator = list.iterator();
		 * iterator.hasNext();) { Object object = (Object) iterator.next();
		 * System.out.println(object); }
		 
		// String key= encryptFile(fromFile, path1+"\\a.gif");
		// System.err.println(key);

		// System.err.println(decryptBASE64(key));

		// System.out.println("文件大小"+fileSize(fromFile.length()));

		String url = path1 + "\\AccessFile.java";

		String inputStr = encryptBASE64(url);

		// System.err.println("BASE64加密后:\n" + inputStr);

		// System.err.println("BASE64解密后:\n" + decryptBASE64(inputStr));
		
		boolean flag=false;
//		decompressZip("D:\\t\\e.zip",flag);
		 *//**
         * 压缩文件
         *//* 
        File[] files = new File[]{new File("d:/t/a.txt"),new File("d:/t/a.xls")}; 
        File zip = new File("d:/t/压缩.zip"); 
        ZipFiles(zip,"ZipFiles",files); 
         
        *//**
         * 解压文件
         *//* 
        File zipFile = new File("d:/t/压缩.zip"); 
        String path = "d:/"; 
        //unZipFiles(zipFile, path); 
	*/}
}