java ZipOutputStream压缩文件,ZipInputStream解压缩

java中实现zip的压缩与解压缩。java自带的 能实现的功能比较有限。

本程序功能：实现简单的压缩和解压缩，压缩文件夹下的所有文件(文件过滤的话需要对File进一步细节处理)。

对中文的支持需要使用java7或java8,可以在ZipOutputStream和ZipInputStream中指定Charset参数，详见API中的构造参数。

1.压缩文件或文件夹

 public void zip() throws IOException {
         File fileSrc = new File("E:\\abc");
         File destFile = new File("E:\\abc.zip");
         zip(fileSrc,destFile);
 }

 public void zip(File fileSrc,File dectFile) throws IOException {
         ZipOutputStream zipOutputStream = new       ZipOutputStream(new CheckedOutputStream(new FileOutputStream(dectFile),new CRC32()));
         String name = fileSrc.getName();
         zip(zipOutputStream, name,fileSrc);
         zipOutputStream.flush();
         zipOutputStream.close();
 }

zip

 private void zip(ZipOutputStream zipOutputStream,String name, File fileSrc) throws IOException {
         if (fileSrc.isDirectory()) {
             File[] files = fileSrc.listFiles(new FilenameFilter() { //过滤文件
                 Pattern pattern = Pattern.compile(".+");//所有文件，正则表达式
                 @Override
                 public boolean accept(File dir, String name) {
                     return pattern.matcher(name).matches();
                 }
             });
             zipOutputStream.putNextEntry(new ZipEntry(name+"/"));  // 建一个文件夹
             name = name+"/";
             for (File f : files) {
                 zip(zipOutputStream,name+f.getName(),f);
             }
         }else {

             zipOutputStream.putNextEntry(new ZipEntry(name));
             FileInputStream input = new FileInputStream(fileSrc);
             byte[] buf = new byte[1024];
             int len = -1;
             while ((len = input.read(buf)) != -1) {
                 zipOutputStream.write(buf, 0, len);
             }
             zipOutputStream.flush();
             input.close();
         }
 }

zip

2.解压缩zip文件

 public void unzip() throws IOException {
         File zipFile = new File("E:\\java.zip");
         String destDir = "E:\\java\\";
         unzip(zipFile,destDir);
 }

 private void unzip(File zipFile, String destDir) throws IOException {
         ZipInputStream zipInputStream = new ZipInputStream(new CheckedInputStream(new FileInputStream(zipFile),new CRC32()));
         ZipEntry zipEntry;
         while ((zipEntry = zipInputStream.getNextEntry()) != null) {
             System.out.println(zipEntry.getName());
             File f = new File(destDir + zipEntry.getName());
             if(zipEntry.getName().endsWith("/")){
                 f.mkdirs();
             }else {
 //                f.createNewFile();
                 FileOutputStream fileOutputStream = new FileOutputStream(f);
                 byte[] buf = new byte[1024];
                 int len = -1;
                 while ((len = zipInputStream.read(buf)) != -1) {  // 直到读到该条目的结尾
                     fileOutputStream.write(buf, 0, len);
                 }
                 fileOutputStream.flush();
                 fileOutputStream.close();
             }
             zipInputStream.closeEntry();  //关闭该条目
         }
         zipInputStream.close();
 }

unzip