Java解压缩zip

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说明:

1、java的解压缩功能可以使用jdk包的工具类来实现,也可以使用apache的工具类来实现。

2、jdk的版本为1.7。

3、使用apache的工具类来实现,需要导入ant.jar包。

4、只能解压缩zip包,不能解压缩rar包,因为它是商业软件,没有公开解密算法。

一、下面是压缩的代码:

/** * 压缩文件-由于out要在递归调用外,所以封装一个方法用来 * 调用ZipFiles(ZipOutputStream out,String path,File... srcFiles) * @param zip * @param path * @param srcFiles * @throws IOException * @author isea533 */public static void ZipFiles(File zip,String path,File... srcFiles) throws IOException{ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zip));ZipTest.ZipFiles(out,path,srcFiles);out.close();System.out.println("*****************压缩完毕*******************");}/** * 压缩文件-File * @param zipFile  zip文件 * @param srcFiles 被压缩源文件 * @author isea533 */public static void ZipFiles(ZipOutputStream out,String path,File... srcFiles){path = path.replaceAll("\\*", "/");if(!path.endsWith("/")){path+="/";}byte[] buf = new byte[1024];try {for(int i=0;i<srcFiles.length;i++){if(srcFiles[i].isDirectory()){File[] files = srcFiles[i].listFiles();String srcPath = srcFiles[i].getName();srcPath = srcPath.replaceAll("\\*", "/");if(!srcPath.endsWith("/")){srcPath+="/";}out.putNextEntry(new ZipEntry(path+srcPath));ZipFiles(out,path+srcPath,files);}else{FileInputStream in = new FileInputStream(srcFiles[i]);System.out.println(path + srcFiles[i].getName());out.putNextEntry(new ZipEntry(path + srcFiles[i].getName()));int len;while((len=in.read(buf))>0){out.write(buf,0,len);}out.closeEntry();in.close();}}} catch (Exception e) {e.printStackTrace();}}


 

二、下面是解压缩代码:

<p>import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.Enumeration;</p><p>import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;</p>
/** * 解压到指定目录 * @param zipPath * @param descDir * @author isea533 */public static void unZipFiles(String zipPath,String descDir)throws IOException{unZipFiles(new File(zipPath), descDir);}/** * 解压文件到指定目录 * @param zipFile * @param descDir * @author isea533 */@SuppressWarnings("rawtypes")public static void unZipFiles(File zipFile,String descDir)throws IOException{File pathFile = new File(descDir);if(!pathFile.exists()){pathFile.mkdirs();}ZipFile zip = new ZipFile(zipFile);for(Enumeration entries = zip.getEntries();entries.hasMoreElements();){ZipEntry entry = (ZipEntry)entries.nextElement();String zipEntryName = entry.getName();InputStream in = zip.getInputStream(entry);String outPath = (descDir+zipEntryName).replaceAll("\\*", "/");;//判断路径是否存在,不存在则创建文件路径File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));if(!file.exists()){file.mkdirs();}//判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压if(new File(outPath).isDirectory()){continue;}//输出文件路径信息System.out.println(outPath);OutputStream out = new FileOutputStream(outPath);byte[] buf1 = new byte[1024];int len;while((len=in.read(buf1))>0){out.write(buf1,0,len);}in.close();out.close();}System.out.println("******************解压完毕********************");}


 

三、下面是测试代码:

public static void main(String[] args) throws IOException {/** * 压缩文件 */File[] files = new File[]{new File("d:/English"),new File("d:/发放数据.xls"),new File("d:/中文名称.xls")};File zip = new File("d:/压缩.zip");ZipFiles(zip,"abc",files);/** * 解压文件 */File zipFile = new File("d:/压缩.zip");String path = "d:/zipfile/";unZipFiles(zipFile, path);}


 转载:http://blog.csdn.net/isea533/article/details/7995472

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