因项目中的文件很大，非常占用磁盘空间，每次磁盘空间不足时客户都要我们手动删除文件，因此想对文件进行压缩，选用apache提供的commons-compress帮助类进行压缩
封装了Gzip、LZ4、Snappy、Zip、Tar几个工具类
请根据业务的不同，选着合适的压缩算法
先到生产环境验证各个压缩算法的效率（时间、空间），我们对压缩时间要求快，所以后面会选择一款快速压缩算法来压缩文件
commons-compress官方参考示例：
https://commons.apache.org/proper/commons-compress/examples.html
下面给出各个工具类，需引用 commons-compress
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.21</version>
</dependency>
CompressUtil把各压缩算法集中起来
/**
* 公用压缩工具类，支持Gzip、Zip、Tar、LZ4、Snappy压缩算法
* @description:
* @author: zhuyu
* @date: 2021/11/27 21:40
*/
public class CompressUtil {
public static class Gzip {
public static void compress(String sourceFile , String targetFile){
GzipUtil.compress(sourceFile , targetFile);
}
public static void uncompress(String sourceFile , String targetFile){
GzipUtil.uncompress(sourceFile , targetFile);
}
}
public static class LZ4 {
public static void compress(String sourceFile , String targetFile){
LZ4Util.compress(sourceFile , targetFile);
}
public static void uncompress(String sourceFile , String targetFile){
LZ4Util.uncompress(sourceFile , targetFile);
}
}
public static class Snappy {
public static void compress(String sourceFile , String targetFile){
SnappyUtil.compress(sourceFile , targetFile);
}
public static void uncompress(String sourceFile , String targetFile){
SnappyUtil.uncompress(sourceFile , targetFile);
}
}
public static class Zip {
public static void compress(String sourceFile, String targetFile){
ZipUtil.compress(sourceFile , targetFile);
}
public static void uncompress(String zipPath, String descDir) {
ZipUtil.uncompress(zipPath , descDir);
}
}
public static class Tar {
public static void compress(String sourceFile, String targetFile) {
TarUtil.compress(sourceFile , targetFile);
}
public static void uncompress(String tarPath, String descDir) {
TarUtil.uncompress(tarPath , descDir);
}
}
}
1.GzipUtil
import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorOutputStream;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
public class GzipUtil {
/**
* 将文件压缩成gzip
* @param sourceFile 源文件，如：archive.tar
* @param targetFile 目标文件，如：archive.tar.gz
*/
public static void compress(String sourceFile , String targetFile) {
long d1 = System.currentTimeMillis();
try (InputStream in = Files.newInputStream(Paths.get(sourceFile));
OutputStream fout = Files.newOutputStream(Paths.get(targetFile));
BufferedOutputStream out = new BufferedOutputStream(fout);
GzipCompressorOutputStream gzOut = new GzipCompressorOutputStream(out);){
int buffersize = 10240;
final byte[] buffer = new byte[buffersize];
int n = 0;
while (-1 != (n = in.read(buffer))) {
gzOut.write(buffer, 0, n);
}
} catch (IOException e) {
System.out.println("压缩失败，原因：" + e.getMessage());
}
System.out.println("压缩完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
/**
* 将gzip文件解压
* @param sourceFile 源文件，如：archive.tar.gz
* @param targetFile 目标文件，如：archive.tar
*/
public static void uncompress(String sourceFile , String targetFile) {
long d1 = System.currentTimeMillis();
try (InputStream fin = Files.newInputStream(Paths.get(sourceFile));
BufferedInputStream in = new BufferedInputStream(fin);
OutputStream out = Files.newOutputStream(Paths.get(targetFile));
GzipCompressorInputStream gzIn = new GzipCompressorInputStream(in);){
int buffersize = 10240;
final byte[] buffer = new byte[buffersize];
int n = 0;
while (-1 != (n = gzIn.read(buffer))) {
out.write(buffer, 0, n);
}
} catch (IOException e) {
System.out.println("解压失败，原因：" + e.getMessage());
}
System.out.println("解压完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
}
2.LZ4Util
import org.apache.commons.compress.compressors.lz4.FramedLZ4CompressorInputStream;
import org.apache.commons.compress.compressors.lz4.FramedLZ4CompressorOutputStream;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
public class LZ4Util {
/**
* 将文件压缩成LZ4文件
*
* @param sourceFile 源文件，如：archive.tar
* @param targetFile 目标文件，如：archive.tar.lz4
*/
public static void compress(String sourceFile, String targetFile) {
long d1 = System.currentTimeMillis();
try (InputStream in = Files.newInputStream(Paths.get(sourceFile));
OutputStream fout = Files.newOutputStream(Paths.get(targetFile));
BufferedOutputStream out = new BufferedOutputStream(fout);
FramedLZ4CompressorOutputStream lzOut = new FramedLZ4CompressorOutputStream(out);){
int buffersize = 10240;
final byte[] buffer = new byte[buffersize];
int n = 0;
while (-1 != (n = in.read(buffer))) {
lzOut.write(buffer, 0, n);
}
} catch (IOException e) {
System.out.println("压缩失败，原因：" + e.getMessage());
}
System.out.println("压缩完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
/**
* 将LZ4文件进行解压
* @param sourceFile 源文件，如：archive.tar.lz4
* @param targetFile 目标文件，如：archive.tar
*/
public static void uncompress(String sourceFile, String targetFile) {
long d1 = System.currentTimeMillis();
try (InputStream fin = Files.newInputStream(Paths.get(sourceFile));
BufferedInputStream in = new BufferedInputStream(fin);
OutputStream out = Files.newOutputStream(Paths.get(targetFile));
FramedLZ4CompressorInputStream zIn = new FramedLZ4CompressorInputStream(in);){
int buffersize = 10240;
final byte[] buffer = new byte[buffersize];
int n = 0;
while (-1 != (n = zIn.read(buffer))) {
out.write(buffer, 0, n);
}
} catch (IOException e) {
System.out.println("解压失败，原因：" + e.getMessage());
}
System.out.println("解压完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
}
3.SnappyUtil
import org.apache.commons.compress.compressors.snappy.FramedSnappyCompressorInputStream;
import org.apache.commons.compress.compressors.snappy.FramedSnappyCompressorOutputStream;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
public class SnappyUtil {
/**
* 将文件压缩成gzip
* @param sourceFile 源文件，如：archive.tar
* @param targetFile 目标文件，如：archive.tar.sz
*/
public static void compress(String sourceFile , String targetFile) {
long d1 = System.currentTimeMillis();
try (InputStream in = Files.newInputStream(Paths.get(sourceFile));
OutputStream fout = Files.newOutputStream(Paths.get(targetFile));
BufferedOutputStream out = new BufferedOutputStream(fout);
FramedSnappyCompressorOutputStream snOut = new FramedSnappyCompressorOutputStream(out);){
int buffersize = 10240;
final byte[] buffer = new byte[buffersize];
int n = 0;
while (-1 != (n = in.read(buffer))) {
snOut.write(buffer, 0, n);
}
} catch (IOException e) {
System.out.println("压缩失败，原因：" + e.getMessage());
}
System.out.println("压缩完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
/**
* 将gzip文件解压
* @param sourceFile 源文件，如：archive.tar.sz
* @param targetFile 目标文件，如：archive.tar
*/
public static void uncompress(String sourceFile , String targetFile) {
long d1 = System.currentTimeMillis();
try (InputStream fin = Files.newInputStream(Paths.get(sourceFile));
BufferedInputStream in = new BufferedInputStream(fin);
OutputStream out = Files.newOutputStream(Paths.get(targetFile));
FramedSnappyCompressorInputStream zIn = new FramedSnappyCompressorInputStream(in);){
int buffersize = 10240;
final byte[] buffer = new byte[buffersize];
int n = 0;
while (-1 != (n = zIn.read(buffer))) {
out.write(buffer, 0, n);
}
} catch (IOException e) {
System.out.println("解压失败，原因：" + e.getMessage());
}
System.out.println("解压完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
}
4.ZipUtil
import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveOutputStream;
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.utils.IOUtils;
import java.io.*;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Objects;
public class ZipUtil {
public static void main(String[] args) {
String rootpath = "C:\\Temp\\chdlTemp\\testcompress";
String sourceFile = rootpath + "\\springboot项目jar瘦身.docx";
String targetFile = rootpath + "\\springboot项目jar瘦身.docx.zip";
//压缩文件
compress(sourceFile , targetFile);
//解压文件
uncompress(targetFile, rootpath + "\\springboot项目jar瘦身2.docx");
//压缩目录
//compress(rootpath , rootpath + ".zip");
//解压目录
//uncompress(rootpath + ".zip" , rootpath + "2");
}
/**
* 将文件压缩成zip
*
* @param sourceFile 源文件或目录，如：archive.tar
* @param targetFile 目标文件，如：archive.tar.zip
*/
public static void compress(String sourceFile, String targetFile) {
long d1 = System.currentTimeMillis();
try (OutputStream fos = new FileOutputStream(targetFile);
OutputStream bos = new BufferedOutputStream(fos);
ArchiveOutputStream aos = new ZipArchiveOutputStream(bos);){
Path dirPath = Paths.get(sourceFile);
Files.walkFileTree(dirPath, new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
ArchiveEntry entry = new ZipArchiveEntry(dir.toFile(), dirPath.relativize(dir).toString());
aos.putArchiveEntry(entry);
aos.closeArchiveEntry();
return super.preVisitDirectory(dir, attrs);
}
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
ArchiveEntry entry = new ZipArchiveEntry(
file.toFile(), dirPath.relativize(file).toString());
aos.putArchiveEntry(entry);
IOUtils.copy(new FileInputStream(file.toFile()), aos);
aos.closeArchiveEntry();
return super.visitFile(file, attrs);
}
});
} catch (IOException e) {
System.out.println("压缩失败，原因：" + e.getMessage());
}
System.out.println("压缩完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
/**
* 将zip文件解压到指定目录
*
* @param zipPath 源文件，如：archive.zip
* @param descDir 解压目录
*/
public static void uncompress(String zipPath, String descDir) {
long d1 = System.currentTimeMillis();
try (InputStream fis = Files.newInputStream(Paths.get(zipPath));
InputStream bis = new BufferedInputStream(fis);
ArchiveInputStream ais = new ZipArchiveInputStream(bis);
){
ArchiveEntry entry;
while (Objects.nonNull(entry = ais.getNextEntry())) {
if (!ais.canReadEntryData(entry)) {
continue;
}
String name = descDir + File.separator + entry.getName();
File f = new File(name);
if (entry.isDirectory()) {
if (!f.isDirectory() && !f.mkdirs()) {
f.mkdirs();
}
} else {
File parent = f.getParentFile();
if (!parent.isDirectory() && !parent.mkdirs()) {
throw new IOException("failed to create directory " + parent);
}
try (OutputStream o = Files.newOutputStream(f.toPath())) {
IOUtils.copy(ais, o);
}
}
}
} catch (IOException e) {
e.printStackTrace();
System.out.println("解压失败，原因：" + e.getMessage());
}
System.out.println("解压完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
}
5.TarUtil
import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveOutputStream;
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.utils.IOUtils;
import java.io.*;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Objects;
public class TarUtil {
public static void main(String[] args) {
String rootpath = "C:\\Temp\\chdlTemp\\testcompress";
String sourceFile = rootpath + "\\springboot项目jar瘦身.docx";
String targetFile = rootpath + "\\springboot项目jar瘦身.docx.tar";
//压缩文件
compress(sourceFile , targetFile);
//解压文件
uncompress(targetFile, rootpath + "\\springboot项目jar瘦身2.docx");
}
/**
* 将文件压缩成tar
*
* @param sourceFile 源文件或目录，如：archive
* @param targetFile 目标文件，如：archive.tar
*/
public static void compress(String sourceFile, String targetFile) {
long d1 = System.currentTimeMillis();
try (OutputStream fos = new FileOutputStream(targetFile);
OutputStream bos = new BufferedOutputStream(fos);
ArchiveOutputStream aos = new TarArchiveOutputStream(bos);){
Path dirPath = Paths.get(sourceFile);
Files.walkFileTree(dirPath, new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
ArchiveEntry entry = new TarArchiveEntry(dir.toFile(), dirPath.relativize(dir).toString());
aos.putArchiveEntry(entry);
aos.closeArchiveEntry();
return super.preVisitDirectory(dir, attrs);
}
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
ArchiveEntry entry = new TarArchiveEntry(
file.toFile(), dirPath.relativize(file).toString());
aos.putArchiveEntry(entry);
IOUtils.copy(new FileInputStream(file.toFile()), aos);
aos.closeArchiveEntry();
return super.visitFile(file, attrs);
}
});
} catch (IOException e) {
System.out.println("压缩失败，原因：" + e.getMessage());
}
System.out.println("压缩完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
/**
* 将tar文件解压到指定目录
*
* @param tarPath 源文件，如：archive.tar
* @param descDir 解压目录
*/
public static void uncompress(String tarPath, String descDir) {
long d1 = System.currentTimeMillis();
try (InputStream fis = Files.newInputStream(Paths.get(tarPath));
InputStream bis = new BufferedInputStream(fis);
ArchiveInputStream ais = new TarArchiveInputStream(bis);
){
ArchiveEntry entry;
while (Objects.nonNull(entry = ais.getNextEntry())) {
if (!ais.canReadEntryData(entry)) {
continue;
}
String name = descDir + File.separator + entry.getName();
File f = new File(name);
if (entry.isDirectory()) {
if (!f.isDirectory() && !f.mkdirs()) {
f.mkdirs();
}
} else {
File parent = f.getParentFile();
if (!parent.isDirectory() && !parent.mkdirs()) {
throw new IOException("failed to create directory " + parent);
}
try (OutputStream o = Files.newOutputStream(f.toPath())) {
IOUtils.copy(ais, o);
}
}
}
} catch (IOException e) {
e.printStackTrace();
System.out.println("解压失败，原因：" + e.getMessage());
}
System.out.println("解压完毕，耗时：" + (System.currentTimeMillis() – d1) + " ms");
}
}
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原文链接：https://blog.csdn.net/zhuyu19911016520/article/details/121584093