有些时候，项目中总会用到各种工具类，这些工具类有些是利用第三方jar或者开源的jar，或者Java基础类达到目的。以下是 压缩解压缩的工具类
一、依赖二、Java代码org.apache.ant ant1.10.12
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.util.Enumeration;
import org.apache.log4j.Logger;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;
public class PackUtil {
private static Logger logger = Logger.getLogger(PackUtil.class);
public static void generateByType(String path, String type) throws Exception {
FileOutputStream fout = new FileOutputStream(path + "." + type);
ZipOutputStream zipOut = new ZipOutputStream(fout);
try {
pack(new File(path), zipOut, "");
zipOut.setEncoding("GBK");
} catch (Exception e) {
logger.info("异常：打包文件生成" + e.getMessage());
throw e;
} finally {
zipOut.close();
fout.close();
clean(new File(path));
}
}
public static void generateRar(String path) throws Exception {
generateByType(path, "rar");
}
public static void generateZip(String path) throws Exception {
generateByType(path, "zip");
}
public static void clean(File f) throws Exception{
String cs[] = f.list();
if (cs == null || cs.length <= 0) {
boolean isDelete = f.delete();
if(!isDelete){
throw new Exception(f.getName()+"文件删除失败！");
}
} else {
for (int i = 0; i < cs.length; i++) {
String cn = cs[i];
String cp = f.getPath() + File.separator + cn;
File f2 = new File(cp);
if (f2.exists() && f2.isFile()) {
boolean isDelete = f2.delete();
if(!isDelete){
throw new Exception(f2.getName()+"文件删除失败！");
}
} else if (f2.exists() && f2.isDirectory()) {
clean(f2);
}
}
boolean isDelete = f.delete();
if(!isDelete){
throw new Exception(f.getName() + "文件删除失败！");
}
}
}
private static void pack(File inputFile, ZipOutputStream zipOut, String base) throws Exception {
FileInputStream fileIn = null;
try {
if (inputFile.isDirectory()) {
File[] files = inputFile.listFiles();
zipOut.putNextEntry(new ZipEntry(base + File.separator));
base = base.length() == 0 ? "" : base + File.separator;
for (int i = 0; i < files.length; i++) {
pack(files[i], zipOut, base + files[i].getName());
}
} else {
zipOut.putNextEntry(new ZipEntry(base));
fileIn = new FileInputStream(inputFile);
int b;
while ((b = fileIn.read()) != -1)
zipOut.write(b);
fileIn.close();
}
} catch (Exception e) {
logger.info("异常：打包失败" + e.getMessage());
throw e;
} finally {
if(fileIn != null){
fileIn.close();
}
}
}
public static void decompre(String zipFilePath, boolean deleteFlag) throws Exception {
try {
File file = new File(zipFilePath);
// 待解压文件是否存在
if (file.exists()) {
System.out.println("文件存在：" + zipFilePath);
ZipFile zipFile = new ZipFile(file, "gbk");
String fileName = file.getName();
String[] arr = fileName.split("\.");
// 判断文件夹是否存在
String parentPath = file.getParent();
System.out.println("父文件夹：" + parentPath);
String unZipFilePath =parentPath + File.separator + arr[0];
System.out.println("加文件名 的父文件夹 ：" + unZipFilePath);
File fileParent = new File(unZipFilePath);
if (!fileParent.isDirectory() && !fileParent.exists()) {
System.out.println("创建父文件夹：" + unZipFilePath);
fileParent.mkdirs(); // 创建文件夹
}
Enumeration e = zipFile.getEntries();
while (e.hasMoreElements()) {
ZipEntry zipEnt = e.nextElement();
String zipEntName = zipEnt.getName();
// 遍历的文件（绝对路径）
File entityFile = new File(parentPath + File.separator + zipEntName);
// 输出的文件
File outFile = new File(unZipFilePath + File.separator + zipEntName);
System.out.println("遍历文件：" + entityFile.getPath());
System.out.println("输出文件：" + outFile.getPath());
// 目录
if (zipEnt.isDirectory()) {
System.out.println("是目录");
if (!outFile.exists()) {
System.out.println("创建目录");
outFile.mkdirs();
}
continue;
}
// 是文件
else {
System.out.println("是文件");
// 读写文件
InputStream is = zipFile.getInputStream(zipEnt);
BufferedInputStream bis = new BufferedInputStream(is);
if (!outFile.exists()) {
System.out.println("创建文件:" + outFile);
outFile.createNewFile();
}
FileOutputStream fos = new FileOutputStream(outFile);
BufferedOutputStream bos = new BufferedOutputStream(fos);
int len;
byte[] buff = new byte[1024];
while ((len = bis.read(buff)) != -1) {
bos.write(buff, 0, len);
}
bos.close();
fos.close();
}
}
zipFile.close();
} else {
System.out.println("文件不存在");
}
} catch (Exception e) {
System.out.println("解压文件出现异常：" + e.getMessage());
throw e;
}
// 删除文件
if (deleteFlag) {
FileUtil.deleteFile(zipFilePath);
}
}
public static void main(String[] args) throws Exception {
String file = "d:\imgs.zip";
decompre(file, false);
logger.info("解压成功");
}
}
