前言
Java语言解压缩文件，文件格式为zip 格式
程序
import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.io.*;import java.util.Enumeration;import java.util.zip.ZipEntry;import java.util.zip.ZipFile;public class FileUtils {private static final Logger log = LoggerFactory.getLogger(FileUtils.class);private static final int buffer = 2048;private static String Path = "/Users/sheng";private static String ZipPath = "/Users/sheng.zip";/*** zip解压* @param srcFile zip源文件* @param destDirPath解压后的目标文件夹* @throws RuntimeException 解压失败会抛出运行时异常*/public static void unZip(String srcFile, String destDirPath) throws RuntimeException {long start = System.currentTimeMillis();File fileSource = new File(srcFile);// 判断源文件是否存在if (!fileSource.exists()) {throw new RuntimeException(fileSource.getPath() + "所指文件不存在");}// 开始解压ZipFile zipFile = null;FileOutputStream fos = null;InputStream is = null;try {zipFile = new ZipFile(srcFile);Enumeration<?> entries = zipFile.entries();while (entries.hasMoreElements()) {ZipEntry entry = (ZipEntry) entries.nextElement();log.info("解压" + entry.getName());// 如果是文件夹，就创建个文件夹if (entry.isDirectory()) {String dirPath = destDirPath + "/" + entry.getName();File dir = new File(dirPath);dir.mkdirs();} else {// 如果是文件，就先创建一个文件，然后用io流把内容copy过去File targetFile = new File(destDirPath + "/" + entry.getName());// 保证这个文件的父文件夹必须要存在if(!targetFile.getParentFile().exists()){targetFile.getParentFile().mkdirs();}targetFile.createNewFile();// 将压缩文件内容写入到这个文件中is = zipFile.getInputStream(entry);fos = new FileOutputStream(targetFile);int len;byte[] buf = new byte[buffer];while ((len = is.read(buf)) != -1) {fos.write(buf, 0, len);}// 关流顺序，先打开的后关闭fos.close();is.close();}}long end = System.currentTimeMillis();log.info("解压完成，耗时：" + (end - start) +" ms");} catch (Exception e) {throw new RuntimeException("unzip error from ZipUtils", e);} finally {if(fos!=null){try {fos.close();} catch (IOException e) {e.printStackTrace();}}if(is!=null){try {is.close();} catch (IOException e) {e.printStackTrace();}}if(zipFile != null){try {zipFile.close();} catch (IOException e) {e.printStackTrace();}}}}public static void main(String[] args) throws IOException {FileUtils.unZip(ZipPath,Path);}}
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