解析zip压缩包 附件中提供ant.jar_JAVA_编程开发_程序员俱乐部

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.util.Enumeration;?
import org.apache.tools.zip.ZipEntry;?
import org.apache.tools.zip.ZipFile;?
import org.apache.tools.zip.ZipOutputStream;?

public class ZIPUtil {?
?
??? public final static int BUFFER_SIZE = 1024 * 8;?
???
??? /**
???? * 打成zip压缩包
???? * @param dirPath? 源文件夹路径
???? * @param toZipPath 解压后存放文件目录
???? */?
??? public static void doZip(String dirPath, String toZipPath) {?
??????? File dir = null;?
??????? ZipOutputStream zipOut = null;?
??????? String zipDirName = "";???? //存储生成的zip包的路径?
??????? String parentPath = null;?
??????? try {?
??????????? dir = new File(dirPath);?
??????????? zipDirName = getZipPath(dir.getName(), toZipPath);?
??????????? parentPath = dir.getParent();?
??????????? zipOut = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipDirName)));?
??????????? doZipHandlerDir(dir, zipOut, parentPath);?
??????????? zipOut.close();?
??????? } catch (Exception e) {?
??????????? e.printStackTrace();?
??????? }?
??? }?
???
??? /**
???? * 获得zip存储路径
???? * @param dirName
???? * @param toZipPath
???? * @return
???? */?
??? private static String getZipPath(String dirName, String toZipPath) {?
??????? String zipDirName = "";?
??????? if (toZipPath != null && !"".equals(toZipPath.trim())) {?
??????????? zipDirName = toZipPath + File.separator;?
??????????? File newDir = new File(zipDirName);?
??????????? if (!newDir.exists()) {?
??????????????? newDir.mkdirs();?
??????????? }?
??????? }?
??????? zipDirName += dirName + ".zip";?
??????? return zipDirName;?
??? }?
???
??? /**
???? * 递归完成目录下文件读取
???? * @param dir
???? * @param zipOut
???? * @throws Exception
???? */?
??? private static void doZipHandlerDir(File dir, ZipOutputStream zipOut, String parentPath) throws Exception {?
??????? File[] files = dir.listFiles();//获得目录下的所有文件（包括目录和文件）?
??????? byte[] buffer = new byte[BUFFER_SIZE];//缓存大小?
??????? if (files.length == 0) {//如果目录为空另行创建?
??????????? zipOut.putNextEntry(new ZipEntry(handlerFilePath(dir.toString(),parentPath)+File.separator));?
??????????? zipOut.closeEntry();?
??????? } else {//如果目录下不为空 则分别处理目录和文件?
??????????? for (File file : files) {?
??????????????? if (file.isDirectory()) {//目录情况递归遍历?
??????????????????? doZipHandlerDir(file, zipOut, parentPath);?
??????????????? } else {//文件情况读文件 并写入到zip包中?
??????????????????? doZipWriteFile(file, zipOut, parentPath, buffer);?
??????????????? }?
??????????? }?
??????? }?
??? }?
???
??? /**
???? * 向zip包中写入文件
???? * @param file 文件对象
???? * @param zipOut zip输出流
???? * @param parentPath 父目录路径
???? * @param buffer? 缓存
???? * @throws Exception 向上抛出异常
???? */?
??? private static void doZipWriteFile(File file, ZipOutputStream zipOut, String parentPath, byte[] buffer) throws Exception {?
??????? FileInputStream fis = new FileInputStream(file);?
??????? zipOut.putNextEntry(new ZipEntry(handlerFilePath(file.toString(), parentPath)));?
??????? int length = 0;//读取字节长度?
??????? while ((length = fis.read(buffer)) > 0) {?
??????????? zipOut.write(buffer, 0, length);?
??????? }?
??????? zipOut.closeEntry();?
??????? fis.close();?
??? }?
??? /**
???? * 处理路径 将绝对路径处理成相对路径 否则zip包中会出现绝对路径下的每一层目录
???? * @param realPath 绝度路径
???? * @param parentPath 需要去掉的父路径
???? * @return? 处理后的相对路径
???? * @throws Exception 找不到父路径时抛出异常
???? */?
??? private static String handlerFilePath(String realPath, String parentPath) throws Exception {?
??????? int index = -1;?
??????? index = realPath.indexOf(parentPath);?
??????? if (index == -1) {?
??????????? throw new Exception("路径错误");?
??????? }?
??????? return realPath.substring(index + parentPath.length());?
??? }?
??? /**
???? * 解压缩文件
???? * @param unZipPath? 要解压缩的zip文件路径 (路径+文件名)
???? * @param toUnZipPath? 解压后存放的路径
???? */?
??? public static void unZip(String unZipPath, String toUnZipPath) {?
??????? ZipFile zipFile = null;?
??????? FileOutputStream outStream = null;?
??????? InputStream inputStream = null;?
??????? File file = null;?
??????? try {?
??????????? zipFile = new ZipFile(unZipPath);?
??????????? for (Enumeration entities = zipFile.getEntries(); entities.hasMoreElements();) {//遍历zip包下的zip条目?
??????????????? ZipEntry zipEntry = (ZipEntry) entities.nextElement();?
??????????????? file = new File(getUnZipPath(zipEntry.getName(), toUnZipPath));?
??????????????? mkdirs(zipEntry, file);?
??????????????? inputStream = zipFile.getInputStream(zipEntry);//从zip条目获得输入流?
??????????????? outStream = new FileOutputStream(file);//获得写入磁盘的输出流?
??????????????? write2Disk(outStream, inputStream);?
??????????? }?
??????????? zipFile.close();?
??????? } catch (Exception e) {?
??????????? e.printStackTrace();?
??????? } finally {?
??????????? try {?
??????????????? if (outStream != null) {?
??????????????????? outStream.close();?
??????????????? }?
??????????????? if (inputStream != null) {?
??????????????????? inputStream.close();?
??????????????? }?
??????????? } catch (IOException e) {?
??????????????? e.printStackTrace();?
??????????? }?
??????? }?
??? }?
??? /**
???? * 解压过程中创建目录
???? * @param zipEntry zip条目
???? * @param file??? 解压的文件夹或者文件
???? */?
??? private static void mkdirs(ZipEntry zipEntry, File file) {?
??????? if (zipEntry.isDirectory()) {?
??????????? file.mkdirs();?
??????? } else {?
??????????? File parent = file.getParentFile();?
??????????? if (!parent.exists()) {?
??????????????? parent.mkdirs();?
??????????? }?
??????? }?
??? }?
??? /**
???? * 解压后写到磁盘
???? * @param outStream 输出流
???? * @param inputStream? 读文件的输入流
???? * @throws IOException? io异常
???? */?
??? private static void write2Disk(FileOutputStream outStream, InputStream inputStream) throws IOException {?
??????? int length = 0;?
??????? byte[] buffer = new byte[BUFFER_SIZE];?
??????? while ((length = inputStream.read(buffer)) > 0) {?
??????????? outStream.write(buffer, 0, length);?
??????? }?
??????? outStream.flush();?
??????? outStream.close();?
??????? inputStream.close();?
??? }?
??? /**
???? * 获得解压后存放路径
???? * @param zipName zip条目名
???? * @param toUnZipPath 解压路径
???? * @return
???? */?
??? private static String getUnZipPath(String zipName, String toUnZipPath) {?
??????? String unZipPath = "";//解压后存储路径?
??????? if (toUnZipPath != null && !"".equals(toUnZipPath)) {?
??????????? unZipPath = toUnZipPath + File.separator;?
??????? }?
??????? unZipPath += zipName;?
??????? return unZipPath;?
??? }?
???
??? public static void main(String[] args) {
??? ?unZip("C:/1.zip", "C:/123");
??? }
}??

• ant.jar (1.2 MB)
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