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 、實現把指定文件夾下的所有文件壓縮為指定文件夾下指定 zip 文件
* 2 、實現把指定文件夾下的 zip 文件解壓到指定目錄下
*/
public class ZipUtils {
public static void main(String[] args) {
zip ("D:\\zip測試", "D:\\測試結果.zip");
unZip("D:\\測試結果.zip", "D:\\解壓結果");
}
/**
* 功能：把 sourceDir 目錄下的所有文件進行 zip 格式的壓縮，保存為指定 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 {//直接壓縮單個文件時，取父目錄
basePath = file.getParent();
}
zipFile(file, basePath, zos);
zos.closeEntry();
zos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 功能：執行文件壓縮成zip文件
* @param source
* @param basePath 待壓縮文件根目錄
* @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;//存相對路徑(相對於待壓縮的根目錄)
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：解壓 zip 文件，只能解壓 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();
}
}
}
