Posted on 2012-05-26 10:51
IceWee 阅读(5591)
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Java
实际开发中可能会用到压缩或解压缩，底层借助于apache的zip，依赖jar文件：ant-1.7.1.jar
ZipUtilsTester.java
public static void main(String[] args) throws Exception 
{
String sourceFolder = "D:/压缩文件夹";
String zipFilePath = "D:/压缩包.zip";
String destDir = "D:/";
ZipUtils.zip(sourceFolder, zipFilePath);
ZipUtils.unZip(zipFilePath, destDir);
}ZipUtils.java
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;
/** *//**
* <p>
* ZIP工具包
* </p>
* <p>
* 依赖：ant-1.7.1.jar
* </p>
*
* @author IceWee
* @date 2012-5-26
* @version 1.0
*/
public class ZipUtils {
/** *//**
* 使用GBK编码可以避免压缩中文文件名乱码
*/
private static final String CHINESE_CHARSET = "GBK";
/** *//**
* 文件读取缓冲区大小
*/
private static final int CACHE_SIZE = 1024;
/** *//**
* <p>
* 压缩文件
* </p>
*
* @param sourceFolder 压缩文件夹
* @param zipFilePath 压缩文件输出路径
* @throws Exception
*/
public static void zip(String sourceFolder, String zipFilePath) throws Exception {
OutputStream out = new FileOutputStream(zipFilePath);
BufferedOutputStream bos = new BufferedOutputStream(out);
ZipOutputStream zos = new ZipOutputStream(bos);
// 解决中文文件名乱码
zos.setEncoding(CHINESE_CHARSET);
File file = new File(sourceFolder);
String basePath = null;
if (file.isDirectory()) {
basePath = file.getPath();
} else {
basePath = file.getParent();
}
zipFile(file, basePath, zos);
zos.closeEntry();
zos.close();
bos.close();
out.close();
}
/** *//**
* <p>
* 递归压缩文件
* </p>
*
* @param parentFile
* @param basePath
* @param zos
* @throws Exception
*/
private static void zipFile(File parentFile, String basePath, ZipOutputStream zos) throws Exception {
File[] files = new File[0];
if (parentFile.isDirectory()) {
files = parentFile.listFiles();
} else {
files = new File[1];
files[0] = parentFile;
}
String pathName;
InputStream is;
BufferedInputStream bis;
byte[] cache = new byte[CACHE_SIZE];
for (File file : files) {
if (file.isDirectory()) {
pathName = file.getPath().substring(basePath.length() + 1) + "/";
zos.putNextEntry(new ZipEntry(pathName));
zipFile(file, basePath, zos);
} else {
pathName = file.getPath().substring(basePath.length() + 1);
is = new FileInputStream(file);
bis = new BufferedInputStream(is);
zos.putNextEntry(new ZipEntry(pathName));
int nRead = 0;
while ((nRead = bis.read(cache, 0, CACHE_SIZE)) != -1) {
zos.write(cache, 0, nRead);
}
bis.close();
is.close();
}
}
}
/** *//**
* <p>
* 解压压缩包
* </p>
*
* @param zipFilePath 压缩文件路径
* @param destDir 压缩包释放目录
* @throws Exception
*/
public static void unZip(String zipFilePath, String destDir) throws Exception {
ZipFile zipFile = new ZipFile(zipFilePath, CHINESE_CHARSET);
Enumeration<?> emu = zipFile.getEntries();
BufferedInputStream bis;
FileOutputStream fos;
BufferedOutputStream bos;
File file, parentFile;
ZipEntry entry;
byte[] cache = new byte[CACHE_SIZE];
while (emu.hasMoreElements()) {
entry = (ZipEntry) emu.nextElement();
if (entry.isDirectory()) {
new File(destDir + entry.getName()).mkdirs();
continue;
}
bis = new BufferedInputStream(zipFile.getInputStream(entry));
file = new File(destDir + entry.getName());
parentFile = file.getParentFile();
if (parentFile != null && (!parentFile.exists())) {
parentFile.mkdirs();
}
fos = new FileOutputStream(file);
bos = new BufferedOutputStream(fos, CACHE_SIZE);
int nRead = 0;
while ((nRead = bis.read(cache, 0, CACHE_SIZE)) != -1) {
fos.write(cache, 0, nRead);
}
bos.flush();
bos.close();
fos.close();
bis.close();
}
zipFile.close();
}
}