package com.espeed.tool;

import java.io.*;
import java.util.Enumeration;

import javax.crypto.CipherInputStream;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;

/**
 * 压缩文件
 * @param srcfile CipherInputStream[]  需要压缩的文件流的列表
 * @param zipfile File    压缩后的文件
 * @param 被压所文件的文件名
 *  */
public class FileMgr {
  public FileMgr() {
  }
  
  /**压缩文件*/
  public static void ZipFiles(CipherInputStream[] srcfile, java.io.File zipfile,String[] fileName) {
	  
	   try {
		    byte[] buf = new byte[1024];
		       FileOutputStream fout = new FileOutputStream(zipfile);
			   ZipOutputStream out = new ZipOutputStream(fout); // 解决中文问题的关键所在
			   out.setEncoding("gbk");
		       for (int i = 0; i < srcfile.length; i++) {
		     	  CipherInputStream in = srcfile[i];
		     	  if(in==null)continue;
		         // Add ZIP entry to output stream.
		         out.putNextEntry(new ZipEntry(fileName[i]+".eml"));
		         // Transfer bytes from the file to the ZIP file
		         int len;
		         while ( (len = in.read(buf)) > 0) {
		         	out.write(buf, 0, len);
		         }
		         // Complete the entry
		         out.closeEntry();
		         in.close();
		         srcfile[i].close();
		       }
		       // Complete the ZIP file
		       out.close();
		       fout.close();
		       System.out.println("压缩完成.");
	} catch (Exception e) {
	}
    }
  
  /**解压缩*/
  public static void UnZipFiles(java.io.File zipfile, String descDir) {
    try {
      // Open the ZIP file
      ZipFile zf = new ZipFile(zipfile);
      
      for (Enumeration entries = zf.getEntries(); entries.hasMoreElements(); ) {
        // Get the entry name
        ZipEntry entry = ( (ZipEntry) entries.nextElement());
        String zipEntryName = entry.getName();
        InputStream in = zf.getInputStream(entry);
        // System.out.println(zipEntryName);
        OutputStream out = new FileOutputStream(descDir + zipEntryName);
        byte[] buf1 = new byte[1024];
        int len;
        while ( (len = in.read(buf1)) > 0) {
          out.write(buf1, 0, len);
        }
        // Close the file and stream
        in.close();
        out.close();
        System.out.println("解压缩完成.");
      }
    }
    catch (IOException e) {
      e.printStackTrace();
    }

  }

  public static void main(String[] args){
	  //压缩文件
	 /* File[] srcfile = new File[2];
	  srcfile[0]=new File("d://ccc.eml");
	  srcfile[1]=new File("d://cccc.eml");
	  File zipfile = new File("D://zip/zip.zip");  */
	 // ZipFiles(srcfile, zipfile);
	  System.out.println("ok");
  }
  
}