package com.example.proxy_tools;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;
public class Zip {
private static void deleteFile(File file){
if (file.isDirectory()){
File[] files = file.listFiles();
for (File f: files) {
deleteFile(f);
}
}else{
file.delete();
}
}
/**
* 解压zip文件至dir目录
* @param zip
* @param dir
*/
public static void unZip(File zip, File dir) {
try {
deleteFile(dir);
ZipFile zipFile = new ZipFile(zip);
//zip文件中每一个条目
Enumeration<? extends ZipEntry> entries = zipFile.entries();
//遍历
while (entries.hasMoreElements()) {
ZipEntry zipEntry = entries.nextElement();
//zip中 文件/目录名
String name = zipEntry.getName();
//原来的签名文件 不需要了
if (name.equals("META-INF/CERT.RSA") || name.equals("META-INF/CERT.SF") || name
.equals("META-INF/MANIFEST.MF")) {
continue;
}
//空目录不管
if (!zipEntry.isDirectory()) {
File file = new File(dir, name);
//创建目录
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
//写文件
FileOutputStream fos = new FileOutputStream(file);
InputStream is = zipFile.getInputStream(zipEntry);
byte[] buffer = new byte[2048];
int len;
while ((len = is.read(buffer)) != -1) {
fos.write(buffer, 0, len);
}
is.close();
fos.close();
}
}
zipFile.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 压缩目录为zip
* @param dir 待压缩目录
* @param zip 输出的zip文件
* @throws Exception
*/
public static void zip(File dir, File zip) throws Exception {
zip.delete();
// 对输出文件做CRC32校验
CheckedOutputStream cos = new CheckedOutputStream(new FileOutputStream(
zip), new CRC32());
ZipOutputStream zos = new ZipOutputStream(cos);
//压缩
compress(dir, zos, "");
zos.flush();
zos.close();
}
/**
* 添加目录/文件 至zip中
* @param srcFile 需要添加的目录/文件
* @param zos zip输出流
* @param basePath 递归子目录时的完整目录 如 lib/x86
* @throws Exception
*/
private static void compress(File srcFile, ZipOutputStream zos,
String basePath) throws Exception {
if (srcFile.isDirectory()) {
File[] files = srcFile.listFiles();
for (File file : files) {
// zip 递归添加目录中的文件
compress(file, zos, basePath + srcFile.getName() + "/");
}
} else {
compressFile(srcFile, zos, basePath);
}
}
private static void compressFile(File file, ZipOutputStream zos, String dir)
throws Exception {
// temp/lib/x86/libdn_ssl.so
String fullName = dir + file.getName();
// 需要去掉temp
String[] fileNames = fullName.split("/");
//正确的文件目录名 (去掉了temp)
StringBuffer sb = new StringBuffer();
if (fileNames.length > 1){
for (int i = 1;i<fileNames.length;++i){
sb.append("/");
sb.append(fileNames[i]);
}
}else{
sb.append("/");
}
//添加一个zip条目
ZipEntry entry = new ZipEntry(sb.substring(1));
zos.putNextEntry(entry);
//读取条目输出到zip中
FileInputStream fis = new FileInputStream(file);
int len;
byte data[] = new byte[2048];
while ((len = fis.read(data, 0, 2048)) != -1) {
zos.write(data, 0, len);
}
fis.close();
zos.closeEntry();
}
}