import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
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;
/**
* 功能：
* 1 、实现把指定文件夹下的所有文件压缩为指定文件夹下指定 zip 文件
* 2 、实现把指定文件夹下的 zip 文件解压到指定目录下
*/
public class ZipUtils {
public static void main(String[] args) {
zip ("D:\\zip测试", "D:\\测试结果.zip");
unZip("D:\\测试结果.zip", "D:\\解压结果");
}
/**
* 功能：把 sourceDir 目录下的所有文件进行 zip 格式的压缩，保存为指定 zip 文件
* @param sourceDir
* @param zipFile
*/
public static void zip(String sourceDir, String zipFile) {
OutputStream os;
try {
os = new FileOutputStream(zipFile);
BufferedOutputStream bos = new BufferedOutputStream(os);
ZipOutputStream zos = new ZipOutputStream(bos);
File file = new File(sourceDir);
String basePath = null;
if (file.isDirectory()) {
basePath = file.getPath();
} else {//直接压缩单个文件时，取父目录
basePath = file.getParent();
}
zipFile(file, basePath, zos);
zos.closeEntry();
zos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 功能：执行文件压缩成zip文件
* @param source
* @param basePath 待压缩文件根目录
* @param zos
*/
private static void zipFile(File source, String basePath,
ZipOutputStream zos) {
File[] files = new File[0];
if (source.isDirectory()) {
files = source.listFiles();
} else {
files = new File[1];
files[0] = source;
}
String pathName;//存相对路径(相对于待压缩的根目录)
byte[] buf = new byte[1024];
int length = 0;
try {
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);
InputStream is = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(is);
zos.putNextEntry(new ZipEntry(pathName));
while ((length = bis.read(buf)) > 0) {
zos.write(buf, 0, length);
}
is.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 功能：解压 zip 文件，只能解压 zip 文件
* @param zipfile
* @param destDir
*/
public static void unZip(String zipfile, String destDir) {
destDir = destDir.endsWith("\\") ? destDir : destDir + "\\";
byte b[] = new byte[1024];
int length;
ZipFile zipFile;
try {
zipFile = new ZipFile(new File(zipfile));
Enumeration enumeration = zipFile.getEntries();
ZipEntry zipEntry = null;
while (enumeration.hasMoreElements()) {
zipEntry = (ZipEntry) enumeration.nextElement();
File loadFile = new File(destDir + zipEntry.getName());
if (zipEntry.isDirectory()) {
loadFile.mkdirs();
} else {
if (!loadFile.getParentFile().exists()){
loadFile.getParentFile().mkdirs();
}
OutputStream outputStream = new FileOutputStream(loadFile);
InputStream inputStream = zipFile.getInputStream(zipEntry);
while ((length = inputStream.read(b)) > 0)
outputStream.write(b, 0, length);
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
