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Hutool是一个小而全的Java工具类库,通过静态方法封装,降低相关API的学习成本,提高工作效率,使Java拥有函数式语言般的优雅,让Java语言也可以“甜甜的”。

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package cn.hutool.extra.compress.archiver;

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.io.IORuntimeException;
import cn.hutool.core.io.IoUtil;
import cn.hutool.core.lang.Filter;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.extra.compress.CompressException;
import org.apache.commons.compress.archivers.ArchiveException;
import org.apache.commons.compress.archivers.ArchiveOutputStream;
import org.apache.commons.compress.archivers.ArchiveStreamFactory;
import org.apache.commons.compress.archivers.ar.ArArchiveOutputStream;
import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorOutputStream;

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.Charset;

/**
 * 数据归档封装,归档即将几个文件或目录打成一个压缩包
* 支持的归档文件格式为: *
    *
  • {@link ArchiveStreamFactory#AR}
  • *
  • {@link ArchiveStreamFactory#CPIO}
  • *
  • {@link ArchiveStreamFactory#JAR}
  • *
  • {@link ArchiveStreamFactory#TAR}
  • *
  • {@link ArchiveStreamFactory#ZIP}
  • *
* * @author looly */ public class StreamArchiver implements Archiver { /** * 创建归档器 * * @param charset 编码 * @param archiverName 归档类型名称,见{@link ArchiveStreamFactory} * @param file 归档输出的文件 * @return StreamArchiver */ public static StreamArchiver create(Charset charset, String archiverName, File file) { return new StreamArchiver(charset, archiverName, file); } /** * 创建归档器 * * @param charset 编码 * @param archiverName 归档类型名称,见{@link ArchiveStreamFactory} * @param out 归档输出的流 * @return StreamArchiver */ public static StreamArchiver create(Charset charset, String archiverName, OutputStream out) { return new StreamArchiver(charset, archiverName, out); } private final ArchiveOutputStream out; /** * 构造 * * @param charset 编码 * @param archiverName 归档类型名称,见{@link ArchiveStreamFactory} * @param file 归档输出的文件 */ public StreamArchiver(Charset charset, String archiverName, File file) { this(charset, archiverName, FileUtil.getOutputStream(file)); } /** * 构造 * * @param charset 编码 * @param archiverName 归档类型名称,见{@link ArchiveStreamFactory} * @param targetStream 归档输出的流 */ public StreamArchiver(Charset charset, String archiverName, OutputStream targetStream) { if("tgz".equalsIgnoreCase(archiverName) || "tar.gz".equalsIgnoreCase(archiverName)){ //issue#I5J33E,支持tgz格式解压 try { this.out = new TarArchiveOutputStream(new GzipCompressorOutputStream(targetStream)); } catch (IOException e) { throw new IORuntimeException(e); } } else { final ArchiveStreamFactory factory = new ArchiveStreamFactory(charset.name()); try { this.out = factory.createArchiveOutputStream(archiverName, targetStream); } catch (ArchiveException e) { throw new CompressException(e); } } //特殊设置 if(this.out instanceof TarArchiveOutputStream){ ((TarArchiveOutputStream)out).setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU); } else if(this.out instanceof ArArchiveOutputStream){ ((ArArchiveOutputStream)out).setLongFileMode(ArArchiveOutputStream.LONGFILE_BSD); } } /** * 将文件或目录加入归档包,目录采取递归读取方式按照层级加入 * * @param file 文件或目录 * @param path 文件或目录的初始路径,null表示位于根路径 * @param filter 文件过滤器,指定哪些文件或目录可以加入,当{@link Filter#accept(Object)}为true时加入。 * @return this * @throws IORuntimeException IO异常 */ @Override public StreamArchiver add(File file, String path, Filter filter) throws IORuntimeException { try { addInternal(file, path, filter); } catch (IOException e) { throw new IORuntimeException(e); } return this; } /** * 结束已经增加的文件归档,此方法不会关闭归档流,可以继续添加文件 * * @return this */ @Override public StreamArchiver finish() { try { this.out.finish(); } catch (IOException e) { throw new IORuntimeException(e); } return this; } @Override public void close() { try{ finish(); } catch (Exception ignore) { //ignore } IoUtil.close(this.out); } /** * 将文件或目录加入归档包,目录采取递归读取方式按照层级加入 * * @param file 文件或目录 * @param path 文件或目录的初始路径,{@code null}表示位于根路径 * @param filter 文件过滤器,指定哪些文件或目录可以加入,当{@link Filter#accept(Object)}为true时加入。 */ private void addInternal(File file, String path, Filter filter) throws IOException { if (null != filter && false == filter.accept(file)) { return; } final ArchiveOutputStream out = this.out; final String entryName; if(StrUtil.isNotEmpty(path)){ // 非空拼接路径,格式为:path/name entryName = StrUtil.addSuffixIfNot(path, StrUtil.SLASH) + file.getName(); } else{ // 路径空直接使用文件名或目录名 entryName = file.getName(); } out.putArchiveEntry(out.createArchiveEntry(file, entryName)); if (file.isDirectory()) { // 目录遍历写入 final File[] files = file.listFiles(); if(ArrayUtil.isNotEmpty(files)){ for (File childFile : files) { addInternal(childFile, entryName, filter); } } else { out.closeArchiveEntry(); } } else { if (file.isFile()) { // 文件直接写入 FileUtil.writeToStream(file, out); } out.closeArchiveEntry(); } } }




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