Java多文件以ZIP壓縮包導出的實現方法

本文實例為大家分享了Java多文件以ZIP壓縮包導出的具體代碼，供大家參考，具體內容如下

1、使用java實現吧服務器的圖片打包成一個zip格式的壓縮包導出，多個文件打包導出。
2、代碼如下：

**ImageByteUtil.java**

 public class ImageByteUtil{ private static float QUALITY = 0.6f; public static void compressZip(List<File> 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("獲取壓縮的數據項失敗! 數據項名為：" + zipEntryName); // 壓縮條目不是具體獨立的文件，而是壓縮包文件列表中的列表項，稱為條目，就像索引一樣ZipEntry zipEntry = new ZipEntry("圖片/"+zipEntryName); // 定位到該壓縮條目位置，開始寫入文件到壓縮包中zipStream.putNextEntry(zipEntry); if (compress) { bytes = ImageByteUtil.compressOfQuality(input, 0); zipStream.write(bytes, 0, bytes.length); } else { bytes = new byte[1024 * 5];// 讀寫緩衝區bufferStream = new BufferedInputStream(input);// 輸入緩衝流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; }}

**Main.java**

 public static void main(String[] args){ //要導出的文件集合,添加自己需要導出的文件List<File> ListFiles = new ArrayList<>(); //調用工具類,參數說明（需要導出的文件集，ByteArrayOutputStream對象，編碼，是否壓縮【true，false】，文件名稱前綴） ImageByteUtil.compressZip(ListFiles, out, "UTF-8", false,"LWJ"); //指定導出格式ReturnContext.addParam("exportFileName","extFile.zip"); ReturnContext.addParam("mimeType", "zip"); return in;}

3、此功能是根據在開發過程中項目需要實現的，測試可正常使用，可更改定制。

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。