在《 把多个文件打包压缩成tar.gz文件并解压的Java实现》中介绍了如何把文件压缩车gz文件,这里介绍如何把文件压缩成zip文件。支持如下方式的压缩:
话不多说,直接上源代码:
/** * 压缩指定文件夹中的所有文件,生成指定名称的zip压缩包 * * @param sourcePath 需要压缩的文件名称列表(包含相对路径) * @param zipOutPath 压缩后的文件名称 **/ public static void batchZipFiles(String sourcePath, String zipOutPath) { ZipOutputStream zipOutputStream = null; WritableByteChannel writableByteChannel = null; MappedByteBuffer mappedByteBuffer = null; try { zipOutputStream = new ZipOutputStream(new FileOutputStream(zipOutPath)); writableByteChannel = Channels.newChannel(zipOutputStream); File file = new File(sourcePath); for (File source : file.listFiles()) { long fileSize = source.length(); //利用putNextEntry来把文件写入 zipOutputStream.putNextEntry(new ZipEntry(source.getName())); long read = Integer.MAX_VALUE; int count = (int) Math.ceil((double) fileSize / read); long pre = 0; //由于一次映射的文件大小不能超过2GB,所以分次映射 for (int i = 0; i < count; i++) { if (fileSize - pre < Integer.MAX_VALUE) { read = fileSize - pre; } mappedByteBuffer = new RandomAccessFile(source, "r").getChannel() .map(FileChannel.MapMode.READ_ONLY, pre, read); writableByteChannel.write(mappedByteBuffer); pre += read; } } mappedByteBuffer.clear(); } catch (Exception e) { log.error("Zip more file error, fileNames: " + sourcePath, e); } finally { try { if (null != zipOutputStream) { zipOutputStream.close(); } if (null != writableByteChannel) { writableByteChannel.close(); } if (null != mappedByteBuffer) { mappedByteBuffer.clear(); } } catch (Exception e) { log.error("Zip more file error, file names are:" + sourcePath, e); } } }
如果您在工作过程中遇到有关zip的压缩问题,不妨在下方留言,大家一起来应对助您解决问题。如果感觉本文对您有帮助,请点赞并收藏。