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
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**
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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("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; }} |
**main.java**
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public static void main(string[] args){ //要导出的文件集合,添加自己需要导出的文件 list<file> listfiles = new arraylist<>(); //调用工具类,参数说明（需要导出的文件集，bytearrayoutputstream对象，编码，是否压缩【true，false】，文件名称前缀） imagebyteutil.compresszip(listfiles, out, "utf-8", false,"lwj"); //指定导出格式 returncontext.addparam("exportfilename","extfile.zip"); returncontext.addparam("mimetype", "zip"); return in;} |
3、此功能是根据在开发过程中项目需要实现的，测试可正常使用，可更改定制。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/lovelongjun/article/details/76104192
