文件压缩解压工具-优快云博客

在某些项目中，需要对文件进行打包，解包。通过网上学习，写了一个压缩、解压的工具类，方便后续使用，可供参考。代码如下：

package com.icss.dem.sdk;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

import com.icss.dem.conf.SystemConfig;
import com.icss.pangu.logging.Log;
import com.icss.pangu.logging.LogFactory;
import com.icss.pangu.util.string.StringUtil;

/**
* <p>Title: 文件打包解包工具类</p>
*/
public class FileZipImpl {
private static Log log = LogFactory.getLog(FileZipImpl.class);
/**
* 数据打包压缩
* @param fileList 文件列表
* @param batchNumber 批次号
* @throws Exception
* @return 返回压缩的文件
*/
public static File zipFile(List fileList, String batchNumber) throws Exception
{
  byte b[] = new byte[512];
  String fileName = batchNumber+ SystemConfig.ZIP_FILE_TYPE;
  log.info("===fileName===" + fileName);
  File zipFile = new File("f:/" + fileName);

  FileOutputStream fileOutputStream;
  ZipOutputStream out = null;
  CheckedOutputStream cs = null;
  try {
   fileOutputStream = new FileOutputStream(zipFile);
   // 定义文件输出流检查
   cs = new CheckedOutputStream(fileOutputStream,new CRC32());
   // 定义输出的zip流对象
   out = new ZipOutputStream(new BufferedOutputStream(cs));
   for (int i = 0; i < fileList.size(); i++) {

    /*
     * 此部分代码为传递文件路径
     */
//       InputStream in = new FileInputStream((String) fileList.get(i));
//    log.info("filePath=="+((String)fileList.get(i)));
//    String tempFileName = ((String)fileList.get(i)).replace(File.separatorChar, '/');

    //下面部分为传递文件对象
    InputStream in = new FileInputStream((File) fileList.get(i));
    log.info("filePath=="+((File)fileList.get(i)).getAbsolutePath());
    String tempFileName = ((File)fileList.get(i)).getAbsolutePath().replace(File.separatorChar, '/');

    tempFileName = tempFileName.substring(tempFileName.indexOf("/") + 1);
    ZipEntry e = new ZipEntry(tempFileName);
    out.putNextEntry(e);
    int len = 0;
    while ((len = in.read(b)) != -1) {
     out.write(b, 0, len);
    }
    out.closeEntry();
   }

   out.close();
   log.info("文件压缩成功");
  } catch (FileNotFoundException e1) {
   log.error("文件未找到",e1);
   throw new Exception("文件未找到");
  } catch (IOException e2) {
   log.error("文件IO出现异常",e2);
   throw new Exception("文件IO出现异常");
  } finally{
   if(null != out)
    out.close();
   if(null != cs)
    cs.close();
  }
  return zipFile;
}

/**
* 解压文件
* @param zipFile 传入的.dem文件
* @return 返回文件列表
*/
public static List unZipFile(ZipFile zipFile)throws Exception
{
  List list = new ArrayList();
  //临时解压文件目录
  String unZipFilePath = SystemConfig.TEMP_UNZIP_PATH;

  File tempPath = new File(unZipFilePath);
  if(tempPath.exists() != true)
   tempPath.mkdir();

  String zipFileName = zipFile.getName();
  log.info("===zipfileName====" + zipFileName);
  if(zipFileName.indexOf(SystemConfig.ZIP_FILE_TYPE) == -1)
  {
   log.error("所传入文件格式不正确");
   throw new Exception("所传入文件格式不正确");
  }
  try{
   Enumeration e = zipFile.entries();
   ZipEntry zipEntry = null;
   createDirectory(unZipFilePath, "");

   while (e.hasMoreElements()) {
    zipEntry = (ZipEntry) e.nextElement();
    log.info("解压文件名称: " + zipEntry.getName());
    if (zipEntry.isDirectory()) {
     String name = zipEntry.getName();
     name = name.substring(0, name.length() - 1);
     File f = new File(unZipFilePath + File.separator + name);
     f.mkdir();
    } else {
     String fileName = zipEntry.getName();
     if (fileName.indexOf("/") != -1) {
      createDirectory(unZipFilePath, fileName.substring(0,
        fileName.lastIndexOf("/")));
     }
     File unZipFile = new File(unZipFilePath + zipEntry.getName());

     unZipFile.createNewFile();
     InputStream in = zipFile.getInputStream(zipEntry);
     FileOutputStream out = new FileOutputStream(unZipFile);

     byte[] by = new byte[1024];
     int c;
     while ((c = in.read(by)) != -1) {
      out.write(by, 0, c);
     }
     out.close();
     in.close();
     list.add(unZipFile);
    }
   }
  } catch (FileNotFoundException e1) {
   log.error("解压文件未找到",e1);
   throw new Exception("解压文件未找到");
  } catch (IOException e2) {
   log.error("文件IO出现异常",e2);
   throw new Exception("文件IO出现异常");
  } finally{

  }

  return list;
}

/**
*
*/
private static void createDirectory(String directory, String subDirectory) {
  String dir[];
  File fl = new File(directory);
  try {
   if (subDirectory == "" && fl.exists() != true)
    fl.mkdir();
   else if (subDirectory != "") {
    dir = StringUtil.convertToArray(subDirectory, "/");
    for (int i = 0; i < dir.length; i++) {
     File subFile = new File(directory + File.separator + dir[i]);
     if (subFile.exists() == false)
      subFile.mkdir();
     directory += File.separator + dir[i];
    }
   }
  } catch (Exception ex) {
  }
}

public static void main(String[] args) throws Exception {
  List list = new ArrayList();
  File file1 = new File("F:/pic/1.jpg");
  File file2 = new File("F:/pic/2.jpg");

  //String file1="F:/pic/1.jpg";
  //String file2="F:/pic/2.jpg";
  list.add(file1);
  list.add(file2);

  try {
   //压缩文件
   //FileZipImpl.zipFile(list, "123");
   //解压文件
   FileZipImpl.unZipFile(new ZipFile("F:/123.dem"));
  } catch (IOException e) {
   // e.printStackTrace();
  }

}
}