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();
}

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();
        }
}

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();
}