字节流存储文件以及解、压缩工具类

import com.jfinal.ext.kit.DateKit;
import com.jfinal.kit.PathKit;
import com.jfinal.kit.PropKit;
import com.jfinal.kit.StrKit;
import com.jfinal.log.Log;
import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
import org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream;
import sun.misc.BASE64Decoder;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.*;
import java.util.zip.*;

/**
 * 文件和目录相关
 * 
 */
public abstract class ToolDirFile {

   private static final Log log = Log.getLog(ToolDirFile.class);

   private static String libPath;
   private static String classesPath;

   /**
    * 获取lib目录
    * 
    * @return
    */
   public static String getLibPath() {
      if (libPath == null) {
         libPath = PathKit.getWebRootPath() + File.separator + "WEB-INF" + File.separator + "lib";
      }
      return libPath;
   }

   /**
    * 获取classes目录
    * 
    * @return
    */
   public static String getClassesPath() {
      if (classesPath == null) {
         /**
          * 1.兼容运行模式 直接运行 JFinalConfig 中的 main 方法 maven： 直接运行 JFinalConfig 中的
          * main 方法 maven： jetty:run maven： tomcat7:run
          */
         // classesPath = PathKit.getRootClassPath();

         /**
          * 2.兼容jboss war部署
          */
         classesPath = PathKit.getWebRootPath() + File.separator + "WEB-INF" + File.separator + "classes";
      }
      return classesPath;
   }

   /**
    * 获取classes路径
    * 
    * @return
    */
   @SuppressWarnings("rawtypes")
   public static String getClassesPath(Class classs) {
      String classRootPath = classs.getClassLoader().getResource("").getFile();
      try {
         classRootPath = java.net.URLDecoder.decode(classRootPath, "UTF-8");
      } catch (UnsupportedEncodingException e) {
         e.printStackTrace();
         if(log.isErrorEnabled()) log.error("初始化加载sql：获取classRootPath异常");
      }
      return classRootPath;
   }

   /**
    * 获取当前代码所在行
    * 
    * @return
    */
   public static String getLineNumber() {
      StackTraceElement ste = new Throwable().getStackTrace()[1];
      return ste.getFileName() + ": Line " + ste.getLineNumber();
   }

   /**
    * 获取目录下的文件名称，不包含子目录名称
    * 
    * @param dirPath
    * @return
    */
   public static List<String> getDirFileNames(String dirPath) {
      List<String> nameList = new ArrayList<String>();
      File file = new File(dirPath);
      File[] files = file.listFiles();
      for (File fileTemp : files) {
         if (!fileTemp.isDirectory()) {
            nameList.add(fileTemp.getName());
         }
      }
      return nameList;
   }

   /**
    * 复制文件夹或文件
    * 
    * @param source
    * @param target
    * @throws IOException
    */
   public static void copyDir(String source, String target) throws IOException {
      (new File(source)).mkdirs();
      // 获取源文件夹当前下的文件或目录
      File[] file = (new File(source)).listFiles();
      for (int i = 0; i < file.length; i++) {
         if (file[i].isFile()) {
            // 复制文件
            copyFile(file[i], new File(target + file[i].getName()));
         }
         if (file[i].isDirectory()) {
            // 复制目录
            String sourceDir = source + File.separator + file[i].getName();
            String targetDir = target + File.separator + file[i].getName();
            copyDirectiory(sourceDir, targetDir);
         }
      }
   }

   /**
    * copy文件或目录
    * 
    * @param source
    * @param target
    */
   public static void lovecopy(String source, String target) {
      // (new File(url2)).mkdirs();
      File f = new File(target);
      if (!f.exists()) {
         f.mkdirs();
      }

      // 获取源文件夹当前下的文件或目录
      File[] file = (new File(source)).listFiles();
      for (int i = 0; i < file.length; i++) {
         if (file[i].isFile()) {
            // 复制文件
            try {
               copyFile(file[i], new File(target + file[i].getName()));
            } catch (IOException e) {
               e.printStackTrace();
            }
         }
         if (file[i].isDirectory()) {
            // 复制目录
            String sourceDir = source + File.separator + file[i].getName();
            String targetDir = target + File.separator + file[i].getName();
            try {
               copyDirectiory(sourceDir, targetDir);
            } catch (IOException e) {
               e.printStackTrace();
            }
         }
      }
   }

   /**
    * 复制文件
    * 
    * @param sourceFile
    * @param targetFile
    * @throws IOException
    */
   public static void copyFile(File sourceFile, File targetFile) throws IOException {
      // 新建文件输入流并对它进行缓冲
      FileInputStream input = new FileInputStream(sourceFile);
      BufferedInputStream inBuff = new BufferedInputStream(input);

      // 新建文件输出流并对它进行缓冲
      FileOutputStream output = new FileOutputStream(targetFile);
      BufferedOutputStream outBuff = new BufferedOutputStream(output);

      // 缓冲数组
      byte[] b = new byte[1024 * 5];
      int len;
      while ((len = inBuff.read(b)) != -1) {
         outBuff.write(b, 0, len);
      }
      // 刷新此缓冲的输出流
      outBuff.flush();

      // 关闭流
      inBuff.close();
      outBuff.close();
      output.close();
      input.close();
   }

   /**
    * 复制文件夹
    * 
    * @param sourceDir
    * @param targetDir
    * @throws IOException
    */
   public static void copyDirectiory(String sourceDir, String targetDir) throws IOException {
      // 新建目标目录
      (new File(targetDir)).mkdirs();
      // 获取源文件夹当前下的文件或目录
      File[] file = (new File(sourceDir)).listFiles();
      for (int i = 0; i < file.length; i++) {
         if (file[i].isFile()) {
            // 源文件
            File sourceFile = file[i];
            // 目标文件
            File targetFile = new File(new File(targetDir).getAbsolutePath() + File.separator + file[i].getName());
            copyFile(sourceFile, targetFile);
         }
         if (file[i].isDirectory()) {
            // 准备复制的源文件夹
            String dir1 = sourceDir + "/" + file[i].getName();
            // 准备复制的目标文件夹
            String dir2 = targetDir + "/" + file[i].getName();
            copyDirectiory(dir1, dir2);
         }
      }
   }

   /**
    * 检查目录是否存在，如果不存在就创建目录
    * 
    * @param dirPath
    */
   public static void createDirectory(String dirPath) {
      File file = new File(dirPath);
      if (!file.exists()) {
         file.mkdirs();
      }
   }

   /**
    * 删除文件或者目录
    * 
    * @param file
    */
   public static void delete(File file) {
      if (file != null && file.exists()) {
         if (file.isDirectory()) {
            File files[] = file.listFiles();
            for (int i = 0, length = files.length; i < length; i++) {
               delete(files[i]);
            }
         } else {
            file.delete();
         }
      }
   }

   /**
    * 文件下载
    * 
    * @param response
    * @param fileName
    * @param filePath
    * @throws IOException
    */
   public static void download(HttpServletResponse response, String fileName, String filePath) throws IOException {
      FileInputStream fis = null;
      BufferedInputStream buff = null;
      try {
         File file = new File(filePath);
         response.setContentType("application/x-msdownload");// 设置response的编码方式
         response.setContentLength((int) file.length());// 写明要下载的文件的大小
         response.setHeader("Content-Disposition",
               "attachment;filename=" + new String(fileName.getBytes(ToolString.encoding), "iso-8859-1")); // 解决中文乱码

         // 读出文件到i/o流
         fis = new FileInputStream(file);
         buff = new BufferedInputStream(fis);
         byte[] bytes = new byte[1024];// 相当于我们的缓存
         long k = 0;// 该值用于计算当前实际下载了多少字节
         OutputStream os = response.getOutputStream();// 从response对象中得到输出流,准备下载

         // 开始循环下载
         while (k < file.length()) {
            int j = buff.read(bytes, 0, 1024);
            k += j;
            os.write(bytes, 0, j);// 将b中的数据写到客户端的内存
         }

         os.flush();// 将写入到客户端的内存的数据,刷新到磁盘

         buff.close();
         buff = null;

         fis.close();
         fis = null;
      } catch (UnsupportedEncodingException e) {
         e.printStackTrace();
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      } finally {
         if (buff != null) {
            buff.close();
            buff = null;
         }
         if (fis != null) {
            fis.close();
            fis = null;
         }
      }
   }

   /**
    * 创建文件
    * 
    * @param savePath
    *            保存路径
    * @param content
    *            文件内容
    */
   public static void createFile(String savePath, String content) {
      try {
         File file = new File(savePath);
         BufferedWriter output = new BufferedWriter(new FileWriter(file));
         output.write(content);
         output.close();
      } catch (Exception e) {
         e.printStackTrace();
      }
   }
   
    /**
     * 指定位置开始写入文件
     * @param outPath  输出文件的路径(路径+文件名)
     * @param tempFile  输入文件
     * 描述 ：把目标文件的指针，移到文件末尾，然后把分片文件追加进去，实现文件合并
     */
    public static void writeFile(String outPath, File tempFile) {
        RandomAccessFile  raFile = null;
        BufferedInputStream inputStream=null;
        try{
            File dirFile = new File(outPath);
            raFile = new RandomAccessFile(dirFile, "rw"); //以读写的方式打开目标文件
            raFile.seek(raFile.length());
            inputStream = new BufferedInputStream(new FileInputStream(tempFile));
            byte[] buf = new byte[1024];
            int length = 0;
            while ((length = inputStream.read(buf)) != -1) {
                raFile.write(buf, 0, length);
            }
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            try {
                if (inputStream != null) {
                    inputStream.close();
                }
                if (raFile != null) {
                    raFile.close();
                }
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }
    
   /***
    * 压缩GZip
    * 
    * @param data
    * @return
    */
   public static byte[] gZip(byte[] data) {
      byte[] b = null;
      try {
         ByteArrayOutputStream bos = new ByteArrayOutputStream();
         GZIPOutputStream gzip = new GZIPOutputStream(bos);
         gzip.write(data);
         gzip.finish();
         gzip.close();
         b = bos.toByteArray();
         bos.close();
      } catch (Exception ex) {
         ex.printStackTrace();
      }
      return b;
   }

   /***
    * 解压GZip
    * 
    * @param data
    * @return
    */
   public static byte[] unGZip(byte[] data) {
      byte[] b = null;
      try {
         ByteArrayInputStream bis = new ByteArrayInputStream(data);
         GZIPInputStream gzip = new GZIPInputStream(bis);
         byte[] buf = new byte[1024];
         int num = -1;
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         while ((num = gzip.read(buf, 0, buf.length)) != -1) {
            baos.write(buf, 0, num);
         }
         b = baos.toByteArray();
         baos.flush();
         baos.close();
         gzip.close();
         bis.close();
      } catch (Exception ex) {
         ex.printStackTrace();
      }
      return b;
   }

   /***
    * 压缩Zip
    * 
    * @param data
    * @return
    */
   public static byte[] zip(byte[] data) {
      byte[] b = null;
      try {
         ByteArrayOutputStream bos = new ByteArrayOutputStream();
         ZipOutputStream zip = new ZipOutputStream(bos);
         ZipEntry entry = new ZipEntry("zip");
         entry.setSize(data.length);
         zip.putNextEntry(entry);
         zip.write(data);
         zip.closeEntry();
         zip.close();
         b = bos.toByteArray();
         bos.close();
      } catch (Exception ex) {
         ex.printStackTrace();
      }
      return b;
   }

   /***
    * 解压Zip
    * 
    * @param data
    * @return
    */
   public static byte[] unZip(byte[] data) {
      byte[] b = null;
      try {
         ByteArrayInputStream bis = new ByteArrayInputStream(data);
         ZipInputStream zip = new ZipInputStream(bis);
         while (zip.getNextEntry() != null) {
            byte[] buf = new byte[1024];
            int num = -1;
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            while ((num = zip.read(buf, 0, buf.length)) != -1) {
               baos.write(buf, 0, num);
            }
            b = baos.toByteArray();
            baos.flush();
            baos.close();
         }
         zip.close();
         bis.close();
      } catch (Exception ex) {
         ex.printStackTrace();
      }
      return b;
   }

   /***
    * 压缩BZip2
    * 
    * @param data
    * @return
    */
   public static byte[] bZip2(byte[] data) {
      byte[] b = null;
      try {
         ByteArrayOutputStream bos = new ByteArrayOutputStream();
         BZip2CompressorOutputStream bzip2 = new BZip2CompressorOutputStream(bos);
         bzip2.write(data);
         bzip2.flush();
         bzip2.close();
         b = bos.toByteArray();
         bos.close();
      } catch (Exception ex) {
         ex.printStackTrace();
      }
      return b;
   }

   /***
    * 解压BZip2
    * 
    * @param data
    * @return
    */
   public static byte[] unBZip2(byte[] data) {
      byte[] b = null;
      try {
         ByteArrayInputStream bis = new ByteArrayInputStream(data);
         BZip2CompressorInputStream bzip2 = new BZip2CompressorInputStream(bis);
         byte[] buf = new byte[1024];
         int num = -1;
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         while ((num = bzip2.read(buf, 0, buf.length)) != -1) {
            baos.write(buf, 0, num);
         }
         b = baos.toByteArray();
         baos.flush();
         baos.close();
         bzip2.close();
         bis.close();
      } catch (Exception ex) {
         ex.printStackTrace();
      }
      return b;
   }
   private static BASE64Decoder b= new BASE64Decoder();
   private static LinkedHashMap<String, String> map = new LinkedHashMap<String, String>();
   static {
      map.put("image/jpeg", ".jpg");
      map.put("image/gif", ".gif");
      map.put("image/png", ".png");
      map.put("video/mp4", ".mp4");
      map.put("video/quicktime", ".mov");
      map.put("audio/amr",".mp3");
   }
   public static String getSuffix(String fileType) {
      return map.get(fileType);
   }

   public static void writeFile(String filePath,InputStream is) {
      FileOutputStream fos=null;
      BufferedOutputStream bos=null;
      try{
         fos=new FileOutputStream(filePath);
         bos =new BufferedOutputStream(fos);

         int n = 0;// 每次读取的字节长度
         byte[] bb = new byte[1024];// 存储每次读取的内容
         while ((n = is.read(bb)) != -1) {
            bos.write(bb, 0, n);// 将读取的内容，写入到输出流当中
         }
         bos.flush();
      } catch (IOException e) {
         e.printStackTrace();
      }finally{
         try {
            if(bos!=null)bos.flush();
            if(fos!=null)fos.close();
            if(bos!=null)bos.close();
            if(is!=null)is.close();
         } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         }
      }
   }
   public static String getFilePath(String fileType) {
      String rootPath= PropKit.get("file.server.path");
      String path="";
      Calendar c=Calendar.getInstance();
      if(StrKit.notBlank(fileType)){
         path+=File.separator+fileType;
      }
      path+=File.separator+ DateKit.toStr(new Date(),"yyyy\\MM");
      File file=new File(rootPath+path);
      if(file!=null && !file.exists()){
         file.mkdirs();
      }
      return path;
   }
   public static File createFile(String pathname) {
      try {
         File file = new File(pathname);
         if(!file.getParentFile().exists())
            file.getParentFile().mkdirs();
         file.createNewFile();
         return file;
      } catch (Exception e) {
         e.printStackTrace();
      }
      return null;
   }

   public static File base64ToFile(String base64,String fileName){
      File file=null;
      FileOutputStream o=null;
      try {
         if(StrKit.notBlank(base64)){
            file=createFile(fileName);
            byte[] image = b.decodeBuffer(base64);
            o = new FileOutputStream(file);
            o.write(image);
         }
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      } catch (IOException e) {
         e.printStackTrace();
      }finally{
         try {
            if(o!=null)o.flush();
            if(o!=null)o.close();
         } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         }
      }
      return file;
   }
   
   /**
    * 
    * createFolder:(在指定文件夹下创建以月份命名的文件夹). 
    * @author sjh
    * @param dir  <br/>
    */
   public static String createDir(String dirNameParent){
      File dirParent=new File(dirNameParent);
      if (!dirParent.exists()) {
            System.out.println("目录" + dirNameParent + "不存在,正在尝试创建目录~");  
            dirParent.mkdirs(); 
        }
        if (!dirNameParent.endsWith(File.separator) && !dirNameParent.endsWith("/")) {  
           dirNameParent = dirNameParent + File.separator;  
        }
        String dirName=DateFormatUtil.yyyyMMFormat.format(new Date());
        dirName = dirNameParent + dirName;  
        File dir=new File(dirName);
        dirName+="/";
        if(dir.exists()){
           System.out.println("目录" + dirName + "已存在，无需创建~");  
           return dirName;
        }else{
           if (dir.mkdirs()) {  
              System.out.println("创建目录" + dirName + "成功！");  
              return dirName;  
           } else {  
              System.out.println("创建目录" + dirName + "失败！");  
              return null;  
           }  
        }
   }

   /**
    * 获得指定文件的byte数组
    */
   public  static  byte[] getBytes(File file){
      byte[] buffer = null;
      try {
         FileInputStream fis = new FileInputStream(file);
         ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
         byte[] b = new byte[1000];
         int n;
         while ((n = fis.read(b)) != -1) {
            bos.write(b, 0, n);
         }
         fis.close();
         bos.close();
         buffer = bos.toByteArray();
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      } catch (IOException e) {
         e.printStackTrace();
      }
      return buffer;
   }

   /**
    * 根据byte数组，生成文件
    */
   public static File getFile(byte[] bfile, String filePath,String fileName) {
      BufferedOutputStream bos = null;
      FileOutputStream fos = null;
      File file = null;
      try {
         File dir = new File(filePath);
         if(!dir.exists()&&dir.isDirectory()){//判断文件目录是否存在
            dir.mkdirs();
         }
         file = new File(filePath+"\\"+fileName);
         fos = new FileOutputStream(file);
         bos = new BufferedOutputStream(fos);
         bos.write(bfile);
         return file;
      } catch (Exception e) {
         e.printStackTrace();
      } finally {
         if (bos != null) {
            try {
               bos.close();
            } catch (IOException e1) {
               e1.printStackTrace();
            }
         }
         if (fos != null) {
            try {
               fos.close();
            } catch (IOException e1) {
               e1.printStackTrace();
            }
         }
      }
      return file;
   }
}