Java多文件以ZIP压缩包导出的实现方法-创新互联

本文实例为大家分享了Java多文件以ZIP压缩包导出的具体代码，供大家参考，具体内容如下

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1、使用java实现吧服务器的图片打包成一个zip格式的压缩包导出，多个文件打包导出。
2、代码如下：

**ImageByteUtil.java**

public class ImageByteUtil{
  private static float QUALITY = 0.6f;
  public static void compressZip(List listfiles, OutputStream output,String encode, boolean compress,String alias){
  ZipOutputStream zipStream = null;
  try {
      zipStream = new ZipOutputStream(output);
      for (File file : listfiles){
        compressZip(file, zipStream, compress,alias+"_"+(listfiles.indexOf(file)+1));
      }
    } catch (Exception e) {
      e.printStackTrace();
    }finally {
      try { 
        if (zipStream != null) { 
          zipStream.close(); 
        } 
      } catch (IOException e) { 
        e.printStackTrace(); 
      }
    }
  }

private static void compressZip(File file, ZipOutputStream zipStream, 
      boolean compress,String alias) throws Exception{
    FileInputStream input = null;
    try {
      input = new FileInputStream(file); 
      //zip(input, zipStream, file.getName(), compress); 
      zip(input, zipStream, alias+"."+file.getName().substring(file.getName().lastIndexOf(".")+1), compress);
    } catch (Exception e) {
      e.printStackTrace();
    }finally {
      try { 
        if(input != null) 
          input.close(); 
      } catch (IOException e) { 
        e.printStackTrace(); 
      }
    }
  }

private static void zip(InputStream input, ZipOutputStream zipStream, 
      String zipEntryName, boolean compress) throws Exception{
      byte[] bytes = null; 
    BufferedInputStream bufferStream = null; 
    try { 
      if(input == null) 
        throw new Exception("获取压缩的数据项失败! 数据项名为：" + zipEntryName); 
      // 压缩条目不是具体独立的文件，而是压缩包文件列表中的列表项，称为条目，就像索引一样 
      ZipEntry zipEntry = new ZipEntry("图片/"+zipEntryName);
      // 定位到该压缩条目位置，开始写入文件到压缩包中 
      zipStream.putNextEntry(zipEntry);
      if (compress) { 
        bytes = ImageByteUtil.compressOfQuality(input, 0); 
        zipStream.write(bytes, 0, bytes.length); 
      } else {
        bytes = new byte[1024 * 5];// 读写缓冲区 
        bufferStream = new BufferedInputStream(input);// 输入缓冲流 
        int read = 0; 
        while ((read = bufferStream.read(bytes)) != -1) {
          zipStream.write(bytes, 0, read); 
        } 
      } 
    } catch (IOException e) { 
      e.printStackTrace(); 
    } finally { 
      try { 
        if (null != bufferStream) 
          bufferStream.close(); 
      } catch (IOException e) { 
        e.printStackTrace(); 
      } 
    }
  }

  public static byte[] compressOfQuality(File file, float quality) throws Exception{
    byte[] bs = null; 
    InputStream input = null; 
    try { 
      input = new FileInputStream(file); 
      bs = compressOfQuality(input,quality);
    } catch (Exception e) { 
      e.printStackTrace(); 
    } finally { 
      try { 
        if (input != null) 
          input.close(); 
      } catch (IOException e) { 
        e.printStackTrace(); 
      } 
    } 
    return bs;
  }

  public static byte[] compressOfQuality(InputStream input, float quality) 
      throws Exception {
      ByteArrayOutputStream output = null; 
    try { 
      output = new ByteArrayOutputStream(); 
      if(quality == 0){ 
        Thumbnails.of(input).scale(1f).outputQuality(QUALITY) 
        .toOutputStream(output); 
      } else { 
        Thumbnails.of(input).scale(1f).outputQuality(quality).toOutputStream(output); 
      } 
      return output.toByteArray(); 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } finally { 
      try { 
        if (output != null) 
          output.close(); 
      } catch (IOException e) { 
        e.printStackTrace(); 
      } 
    } 
    return null;
  }
}

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