JAVA解压、压缩ZIP文件

最新推荐文章于 2024-09-10 11:31:16 发布

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#JAVA解压 #JAVA压缩ZIP

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本文介绍了一个Java类，用于实现ZIP文件的压缩和解压缩功能。该类使用了Apache Commons Compress库来处理ZIP文件操作，并提供了方便的方法来压缩多个文件到一个ZIP文件或从ZIP文件中解压文件到指定目录。

package com.core.common;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.compress.archivers.ArchiveEntry;
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.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
* 
* ClassName: ZipFile
* 
* 
* Description: 压缩&解压文件
* 
*/
public class ZipFile {
/**
* 
* Field log: 日志
* 
*/
public Logger log = LoggerFactory.getLogger(this.getClass());

/**
* 
* Field byteSize: 字节数组长度
* 
*/
private String byteSize = "1024";

/**
* 
* Field encoding: 编码格式
* 
*/
private String encoding = "UTF-8";

/**
* 
* Description: 构造函数
* 
*/
public ZipFile() {
}

/**
* 
* Description: 构造方法
* 
*
* @param encoding 编码
*/
public ZipFile(String encoding) {
this.encoding = encoding;
}

/**
* 
* Description: 把zip文件解压到指定的文件夹
* 
*
* @param zipFilePath zip文件路径
* @param saveFileDir 解压后的文件存放路径
* @throws Exception 异常
*/
public void decompressZip(String zipFilePath, String saveFileDir) throws Exception {
File file = null;
file = new File(zipFilePath);
if (file.exists()) {
InputStream is = null;
ZipArchiveInputStream zais = null;
try {
is = new FileInputStream(file);
zais = new ZipArchiveInputStream(is, this.encoding);
ArchiveEntry archiveEntry = null;

//把zip包中的每个文件读取出来
//然后把文件写到指定的文件夹
while ((archiveEntry = zais.getNextEntry()) != null) {

//如果是目录,则自动创建
if (archiveEntry.isDirectory()) {
File f = new File(saveFileDir + archiveEntry.getName());
f.mkdir();
continue;
}

//构造解压出来的文件存放路径
String entryFilePath = null;
entryFilePath = saveFileDir + archiveEntry.getName();
byte[] content = null;
content = new byte[new Integer(this.byteSize)];
OutputStream os = null;
try {
//把解压出来的文件写到指定路径
File entryFile = null;
entryFile = new File(entryFilePath);
os = new FileOutputStream(entryFile);
int r;
while ((r = zais.read(content)) > 0) {
os.write(content, 0, r);
}
} catch (Exception throwable) {
this.log.error("解压缩错误:", throwable);
throw throwable;
} finally {
if (os != null) {
os.flush();
os.close();
}
}
}
} catch (Exception throwable) {
this.log.error("解压缩错误:", throwable);
throw throwable;
} finally {
try {
if (zais != null) {
zais.close();
}
if (is != null) {
is.close();
}
} catch (Exception throwable) {
this.log.error("解压缩错误:", throwable);
throw throwable;
}
}
}
}

/**
* 
* Description: 压缩文件
* 
*
* @param files 需要压缩的文件
* @param zipFilePath zip文件
* @throws Exception 异常
*/
public void compressFiles2Zip(File[] files, String zipFilePath) throws Exception {
if (files != null && files.length > 0) {
ZipArchiveOutputStream zaos = null;
try {
File zipFile = null;
zipFile = new File(zipFilePath);
zaos = new ZipArchiveOutputStream(zipFile);

//将每个文件用ZipArchiveEntry封装
//再用ZipArchiveOutputStream写到压缩文件中
for (File file : files) {
if (file != null) {
ZipArchiveEntry zipArchiveEntry = null;
zipArchiveEntry = new ZipArchiveEntry(file, file.getName());
zaos.putArchiveEntry(zipArchiveEntry);
InputStream is = null;
try {
is = new BufferedInputStream(new FileInputStream(file), Constants.IO_BUFFERED);
byte[] buffer = null;
buffer = new byte[new Integer(this.byteSize)];
int len = -1;
while ((len = is.read(buffer)) != -1) {
zaos.write(buffer, 0, len);
}
zaos.closeArchiveEntry();
} catch (Exception throwable) {
this.log.error("压缩错误:", throwable);
throw throwable;
} finally {
if (is != null) {
is.close();
}
}
}
}
zaos.finish();
} catch (Exception throwable) {
this.log.error("压缩错误:", throwable);
throw throwable;
} finally {
try {
if (zaos != null) {
zaos.close();
}
} catch (Exception throwable) {
this.log.error("关闭失败:", throwable);
throw throwable;
}
}

}
}
}