1.将指定目录下的文件打包成 .zip
代码示例:
import java.io.*; import java.util.zip.*; public class zipfiles { public static void main(string[] args) { // 要压缩的文件或文件夹 string sourcefile = "path/to/your/source/file_or_folder"; // 压缩后的zip文件名 string zipfilename = "output.zip"; // 创建一个输出流将数据写入zip文件 try (fileoutputstream fos = new fileoutputstream(zipfilename); zipoutputstream zos = new zipoutputstream(fos)) { // 调用递归方法压缩文件或文件夹 addtozipfile(sourcefile, sourcefile, zos); system.out.println("文件已成功打包成 " + zipfilename); } catch (ioexception e) { e.printstacktrace(); } } private static void addtozipfile(string path, string sourcefile, zipoutputstream zos) throws ioexception { file file = new file(sourcefile); // 如果是文件夹,则获取其内容并递归调用此方法 if (file.isdirectory()) { string[] filelist = file.list(); if (filelist != null) { for (string filename : filelist) { addtozipfile(path, sourcefile + file.separator + filename, zos); } } return; } // 如果是文件,则将其添加到zip文件中 try (fileinputstream fis = new fileinputstream(sourcefile)) { string entryname = sourcefile.substring(path.length() + 1); // 获取zip中的条目名称 zipentry zipentry = new zipentry(entryname); zos.putnextentry(zipentry); byte[] bytes = new byte[1024]; int length; while ((length = fis.read(bytes)) >= 0) { zos.write(bytes, 0, length); } } } }
将 path/to/your/source/file_or_folder
替换为要打包的文件或文件夹的路径,然后运行该代码。它将创建一个名为 output.zip
的zip文件,其中包含指定路径下的文件或文件夹。
2.将指定目录下的文件打包成 .tar.gz
可以使用 java 中的 java.util.zip
包来创建 .tar.gz
文件。尽管 java 的标准库没有直接提供对 .tar
格式的支持,但你可以使用 tararchiveoutputstream
以及 gzipcompressoroutputstream
来创建 tar.gz
归档文件。以下是一个示例:
import org.apache.commons.compress.archivers.tar.*; import org.apache.commons.compress.compressors.gzip.gzipcompressoroutputstream; import java.io.*; public class targzfiles { public static void main(string[] args) { // 要压缩的文件或文件夹 string sourcefile = "path/to/your/source/file_or_folder"; // 压缩后的tar.gz文件名 string targzfilename = "output.tar.gz"; try { fileoutputstream fos = new fileoutputstream(targzfilename); bufferedoutputstream bos = new bufferedoutputstream(fos); gzipcompressoroutputstream gzos = new gzipcompressoroutputstream(bos); tararchiveoutputstream tararchive = new tararchiveoutputstream(gzos); file file = new file(sourcefile); addtotararchive(file, tararchive); tararchive.finish(); tararchive.close(); system.out.println("文件已成功打包成 " + targzfilename); } catch (ioexception e) { e.printstacktrace(); } } private static void addtotararchive(file file, tararchiveoutputstream tararchive) throws ioexception { string entryname = file.getname(); tararchiveentry tarentry = new tararchiveentry(file, entryname); tararchive.putarchiveentry(tarentry); if (file.isfile()) { try (fileinputstream fis = new fileinputstream(file)) { byte[] buffer = new byte[1024]; int len; while ((len = fis.read(buffer)) != -1) { tararchive.write(buffer, 0, len); } tararchive.closearchiveentry(); } } else if (file.isdirectory()) { tararchive.closearchiveentry(); file[] children = file.listfiles(); if (children != null) { for (file child : children) { addtotararchive(child, tararchive); } } } } }
在此示例中,使用了 apache commons compress 库,你可以在 maven =添加以下依赖:
maven:
<dependency> <groupid>org.apache.commons</groupid> <artifactid>commons-compress</artifactid> <version>1.21</version> <!-- 或者更高的版本 --> </dependency>
确保将 path/to/your/source/file_or_folder
替换为要打包的文件或文件夹的实际路径,然后运行代码以创建 output.tar.gz
文件。
3.将指定目录下的文件打包成 .tar
java的标准库中并没有直接支持创建.tar
格式文件的类,但你可以使用apache commons compress库来完成这个任务。下面是一个示例代码:
首先,确保你在项目中包含了apache commons compress库。如果使用maven,可以在pom.xml
文件中添加以下依赖项:
<dependency> <groupid>org.apache.commons</groupid> <artifactid>commons-compress</artifactid> <version>1.21</version> <!-- 或者更高的版本 --> </dependency>
然后,使用以下代码将文件打包成.tar
文件:
import org.apache.commons.compress.archivers.tar.*; import org.apache.commons.compress.utils.ioutils; import java.io.*; import java.nio.file.files; import java.nio.file.path; import java.nio.file.paths; public class tarfiles { public static void main(string[] args) { // 要打包的文件或文件夹 string sourcefile = "path/to/your/source/file_or_folder"; // 打包后的tar文件名 string tarfilename = "output.tar"; try { fileoutputstream fos = new fileoutputstream(tarfilename); bufferedoutputstream bos = new bufferedoutputstream(fos); tararchiveoutputstream tararchive = new tararchiveoutputstream(bos); addtotararchive(sourcefile, tararchive); tararchive.finish(); tararchive.close(); system.out.println("文件已成功打包成 " + tarfilename); } catch (ioexception e) { e.printstacktrace(); } } private static void addtotararchive(string filepath, tararchiveoutputstream tararchive) throws ioexception { path sourcepath = paths.get(filepath); string basedir = sourcepath.getfilename().tostring(); files.walk(sourcepath) .filter(path -> !files.isdirectory(path)) .foreach(path -> { try { string entryname = basedir + file.separator + sourcepath.relativize(path).tostring(); tararchiveentry tarentry = new tararchiveentry(path.tofile(), entryname); tararchive.putarchiveentry(tarentry); fileinputstream fis = new fileinputstream(path.tofile()); ioutils.copy(fis, tararchive); fis.close(); tararchive.closearchiveentry(); } catch (ioexception e) { e.printstacktrace(); } }); } }
在这个示例中,我们使用了apache commons compress库来创建.tar
文件。确保将path/to/your/source/file_or_folder
替换为你要打包的实际文件或文件夹的路径,并运行代码来创建output.tar
文件。
4.将指定目录下的文件打包成 .rar
在java中,压缩成rar格式的操作稍微有些复杂,因为rar格式是一种专有格式,并没有java标准库提供直接支持。为了压缩文件为rar格式,你可以使用第三方库,比如通过调用winrar或其他命令行工具来实现。
一种方法是使用java的processbuilder
来运行命令行来执行winrar或其他rar压缩工具的命令。以下是一个简单的示例,假设你已经安装了winrar并将其路径添加到了系统的环境变量中:
import java.io.*; public class rarfiles { public static void main(string[] args) { // 要压缩的文件或文件夹 string sourcefile = "path/to/your/source/file_or_folder"; // 压缩后的rar文件名 string rarfilename = "output.rar"; try { // 构建命令行 string[] command = {"cmd", "/c", "rar", "a", "-r", rarfilename, sourcefile}; // 创建进程并执行命令 processbuilder processbuilder = new processbuilder(command); process process = processbuilder.start(); // 读取进程输出(可选) bufferedreader reader = new bufferedreader(new inputstreamreader(process.getinputstream())); string line; while ((line = reader.readline()) != null) { system.out.println(line); } // 等待进程执行结束 int exitcode = process.waitfor(); if (exitcode == 0) { system.out.println("文件已成功打包成 " + rarfilename); } else { system.out.println("打包过程中出现错误"); } } catch (ioexception | interruptedexception e) { e.printstacktrace(); } } }
请替换 path/to/your/source/file_or_folder
为你要压缩的文件或文件夹的路径,并确保系统中已经正确安装和配置了winrar。
记住,这种方法需要系统中安装有winrar并且路径被正确添加到系统的环境变量中,且这个示例中的代码并没有对winrar命令返回的错误进行详细处理。
5.生成若干个txt并打包到zip中
代码示例:
import java.io.*; import java.util.zip.*; public class generatetxtfilesandzip { public static void main(string[] args) { string basepath = "path/to/your/directory"; // 更换为你想要保存文件的文件夹路径 int filecount = 10; // 要生成的文件数量 try { // 创建文件夹(如果不存在) file directory = new file(basepath); if (!directory.exists()) { directory.mkdirs(); } // 生成txt文件并写入内容 for (int i = 1; i <= filecount; i++) { string filename = "file" + i + ".txt"; string filepath = basepath + file.separator + filename; string filecontent = "this is the content of " + filename; try (bufferedwriter writer = new bufferedwriter(new filewriter(filepath))) { writer.write(filecontent); } catch (ioexception e) { e.printstacktrace(); } } // 打包成zip文件 string zipfilename = "output.zip"; byte[] buffer = new byte[1024]; fileoutputstream fos = new fileoutputstream(zipfilename); zipoutputstream zos = new zipoutputstream(fos); file dir = new file(basepath); file[] files = dir.listfiles(); if (files != null) { for (file file : files) { if (file.getname().endswith(".txt")) { fileinputstream fis = new fileinputstream(file); zos.putnextentry(new zipentry(file.getname())); int length; while ((length = fis.read(buffer)) > 0) { zos.write(buffer, 0, length); } zos.closeentry(); fis.close(); } } } zos.close(); system.out.println("文件已成功打包成 " + zipfilename); } catch (ioexception e) { e.printstacktrace(); } } }
请替换path/to/your/directory
为你想要保存生成文件的实际文件夹路径。这段代码会在指定路径下生成10个.txt
文件,并将它们打包成一个名为output.zip
的zip文件。
附:java实现zip、tar、tar.gz 打包压缩解压
package com.bj.drj; import cn.hutool.core.lang.console; import org.apache.commons.compress.archivers.tar.tararchiveentry; import org.apache.commons.compress.archivers.tar.tararchiveinputstream; import org.apache.commons.compress.archivers.tar.tararchiveoutputstream; import org.apache.commons.compress.archivers.zip.ziparchiveentry; import org.apache.commons.compress.archivers.zip.ziparchiveinputstream; import org.apache.commons.compress.archivers.zip.ziparchiveoutputstream; import org.apache.commons.compress.compressors.gzip.gzipcompressorinputstream; import org.apache.commons.compress.compressors.gzip.gzipcompressoroutputstream; import org.apache.commons.io.ioutils; import java.io.*; /** * @classname packandcompressionutils * @description: 解压压缩文件 * @author drj * @date 2021/9/18 * @version v1.0 **/ public class packandcompressionutils { private packandcompressionutils() { } /** * 这个方法主要针对文件实现打包tar 也可以生成tar.gz 但是失去了gz 压缩功能 只是现实了打包。 * * @param filespatharray 需要打包的文件 * @param targetdirpath 生成tar 目录 * @return * @throws exception */ public static boolean tarpack(string[] filespatharray, string targetdirpath) throws exception { try (fileoutputstream fileoutputstream = new fileoutputstream(new file(targetdirpath)); bufferedoutputstream bufferedoutputstream = new bufferedoutputstream(fileoutputstream); tararchiveoutputstream tararchiveoutputstream = new tararchiveoutputstream(bufferedoutputstream)) { for (string filepath : filespatharray) { try (fileinputstream fileinputstream = new fileinputstream(new file(filepath))) { file file = new file(filepath); tararchiveentry tae = new tararchiveentry(file, file.getname()); tararchiveoutputstream.putarchiveentry(tae); ioutils.copy(fileinputstream, tararchiveoutputstream); tararchiveoutputstream.closearchiveentry(); } catch (exception e) { console.error(e, "异常信息:{}", filepath); } } } catch (exception e) { console.error(e, "异常信息:{}", filespatharray); } return true; } /** * 解压打包文件 * * @param unpackfilepath * @param targetdirpath * @return * @throws exception */ public static boolean tarunpack(string unpackfilepath, string targetdirpath) throws exception { try (fileinputstream fileinputstream = new fileinputstream(new file(unpackfilepath)); tararchiveinputstream tararchiveinputstream = new tararchiveinputstream(fileinputstream)) { tararchiveentry tae = null; while ((tae = tararchiveinputstream.getnexttarentry()) != null) { string dir = targetdirpath + file.separator + tae.getname(); try (fileoutputstream fileoutputstream = new fileoutputstream(new file(dir)); bufferedoutputstream bufferedoutputstream = new bufferedoutputstream(fileoutputstream)) { ioutils.copy(tararchiveinputstream, bufferedoutputstream); } catch (exception ex) { console.error(ex, "异常文件:{}", dir); } } } catch (exception ex) { console.error(ex, "异常文件:{}", unpackfilepath); } return true; } /** * gzip压缩文件 后缀是.gz * * @param filespatharray * @param targetdirpath * @return * @throws ioexception */ public static boolean gzipcompress(string[] filespatharray, string targetdirpath) throws ioexception { try (outputstream outputstream = new fileoutputstream(new file(targetdirpath)); gzipcompressoroutputstream gzipcompressoroutputstream = new gzipcompressoroutputstream(outputstream)) { for (string filepath : filespatharray) { try (inputstream inputstream = new fileinputstream(new file(filepath));) { tararchiveoutputstream tararchiveoutputstream = new tararchiveoutputstream(gzipcompressoroutputstream); file file = new file(filepath); tararchiveentry archiveentry = new tararchiveentry(file, file.getname()); tararchiveoutputstream.putarchiveentry(archiveentry); ioutils.copy(inputstream, tararchiveoutputstream); tararchiveoutputstream.closearchiveentry(); } catch (exception ex) { console.error(ex, "异常文件:{}", filepath); } } } catch (exception ex) { console.error(ex, "异常文件:{}", filespatharray); } return true; } /** * 针对gz包 进行解压 * * @param sourcedir * @param targetdirpath */ public static boolean gzipdecompress(string sourcedir, string targetdirpath) { try ( fileinputstream fileinputstream = new fileinputstream(sourcedir); gzipcompressorinputstream gzipcompressorinputstream = new gzipcompressorinputstream(fileinputstream); tararchiveinputstream tararchiveinputstream = new tararchiveinputstream(gzipcompressorinputstream); ) { tararchiveentry tararchiveentry = null; while ((tararchiveentry = tararchiveinputstream.getnexttarentry()) != null) { string dir = targetdirpath + file.separator + tararchiveentry.getname(); try (fileoutputstream fileoutputstream = new fileoutputstream(new file(dir))) { ioutils.copy(tararchiveinputstream, fileoutputstream); } catch (exception ex) { console.error(ex, "异常文件路径:{}", sourcedir); } } } catch (exception ex) { console.error(ex, "异常文件路径:{}", sourcedir); } return true; } /** * 对文件进行zip打包处理 * * @param filespatharray * @param targetdirpath * @return * @throws exception */ public static boolean zipcompress(string[] filespatharray, string targetdirpath) throws exception { try (fileoutputstream fileoutputstream = new fileoutputstream(new file(targetdirpath)); ziparchiveoutputstream ziparchiveoutputstream = new ziparchiveoutputstream(fileoutputstream)) { for (string filepath : filespatharray) { try (fileinputstream fileinputstream = new fileinputstream(new file(filepath))) { file file = new file(filepath); ziparchiveentry zae = new ziparchiveentry(file, file.getname()); ziparchiveoutputstream.putarchiveentry(zae); ioutils.copy(fileinputstream, ziparchiveoutputstream); ziparchiveoutputstream.closearchiveentry(); } catch (exception ex) { console.error(ex, "异常文件路径:{}", filepath); } } } catch (exception ex) { console.error(ex, "异常文件路径:{}", filespatharray); } return true; } /** * 解压zip 文件 * * @param decompressfilepath * @param targetdirpath * @return * @throws exception */ public static boolean zipdecompress(string decompressfilepath, string targetdirpath) throws exception { try (fileinputstream fileinputstream = new fileinputstream(new file(decompressfilepath)); ziparchiveinputstream ziparchiveinputstream = new ziparchiveinputstream(fileinputstream)) { ziparchiveentry zae = null; while ((zae = ziparchiveinputstream.getnextzipentry()) != null) { string dir = targetdirpath + file.separator + zae.getname(); try (fileoutputstream fileoutputstream = new fileoutputstream(new file(dir))) { ioutils.copy(ziparchiveinputstream, fileoutputstream); } catch (exception ex) { console.error(ex, "异常文件路径:{}", dir); } } } catch (exception ex) { console.error(ex, "异常文件路径:{}", decompressfilepath); } return true; } }
单元测试
string[] filespatharray = new string[]{"d:\\core\\a.txt", "d:\\core\\b.txt"}; string[] filetarpath = new string[]{"d:\\core\\tarcompress.tar"}; string compresstartargetdirpath = "d:\\core\\tarcompress.tar.gz"; string compressziptargetdirpath = "d:\\core\\tarcompress.zip"; string compressgztargetdirpath = "d:\\core\\tarcompress3.gz"; string compressgztargetdirpath4 = "d:\\core\\tarcompress4.gz"; string decompressdirpath = "d:\\core"; @test public void testtarpack() throws exception { boolean b = packandcompressionutils.tarpack(filespatharray, compresstartargetdirpath); assert.asserttrue(b); } @test public void testtarunpack() throws exception { boolean b = packandcompressionutils.tarunpack(compressgztargetdirpath, decompressdirpath); assert.asserttrue(b); } @test public void testzipcompress() throws exception { boolean b = packandcompressionutils.zipcompress(filespatharray, compressziptargetdirpath); assert.asserttrue(b); } @test public void testzipdecompress() throws exception { boolean b = packandcompressionutils.zipdecompress(compressziptargetdirpath, decompressdirpath); assert.asserttrue(b); } @test public void test() throws exception { myuntargzutil.untargz(compressgztargetdirpath,decompressdirpath); } @test public void testgzcompress() throws exception { boolean b = packandcompressionutils.gzipcompress(filespatharray, compressgztargetdirpath4); assert.asserttrue(b); } @test public void testgzdecompress() throws exception { boolean b = packandcompressionutils.gzipdecompress(compresstartargetdirpath, decompressdirpath); assert.asserttrue(b); }
总结
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