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);
}
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