Java Zip多文件压缩和 GZIP压缩

/**

 * 多文件压缩

 * 

 * @author Administrator

 * 

 */

public class ZipCompress {

public static void main(String args[]) {

String[] filepaths = { "D:\\zip1.txt", "D:\\zip2.txt" };

try {

FileOutputStream f = new FileOutputStream("D://test.zip");

// 输出校验流,采用Adler32更快

CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());

//创建压缩输出流

ZipOutputStream zos = new ZipOutputStream(csum);

BufferedOutputStream out = new BufferedOutputStream(zos);

//设置Zip文件注释

zos.setComment("A test of java Zipping");

for (String s : filepaths) {

System.out.println("Writing file " + s);

//针对单个文件建立读取流

BufferedReader bin = new BufferedReader(new FileReader(s));

//ZipEntry ZIP 文件条目

//putNextEntry 写入新条目，并定位到新条目开始处

zos.putNextEntry(new ZipEntry(s));

int c;

while ((c = bin.read()) != -1) {

out.write(c);

}

bin.close();

out.flush();

}

out.close();

FileInputStream fi = new FileInputStream("D://test.zip");

CheckedInputStream csumi = new CheckedInputStream(fi, new Adler32());

ZipInputStream in2 = new ZipInputStream(csumi);

BufferedInputStream bis = new BufferedInputStream(in2);

ZipEntry ze;

while ((ze = in2.getNextEntry()) != null) {

System.out.println("Reader File " + ze);

int x;

while ((x = bis.read()) != -1)

System.out.println(x);

}

//利用ZipFile解压压缩文件

ZipFile zf = new ZipFile("D:\\test.zip");

Enumeration e = zf.entries();

while(e.hasMoreElements()){

ZipEntry ze2 = (ZipEntry) e.nextElement();

System.out.println("File name : "+ze2);

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

/**  

 * 文件压缩  

 * 把文件压缩成GZIP 单一的流数据 并不是互异的数据  

 * GZIPOutputStream的使用  

 * @author Administrator  

 *   

 */  

public class GzipPcompress {   

  

    public static void main(String args[]) {   

        try {   

            BufferedReader in = new BufferedReader(new FileReader("D:\\gziptest.txt"));   

  

            BufferedOutputStream out = new BufferedOutputStream(   

                    new GZIPOutputStream(new FileOutputStream("D:\\test.gz")));   

            System.out.println("Writing file");   

            int c;   

            while ((c = in.read()) != -1) {   

                out.write(c);   

            }   

            in.close();   

            out.close();   

            System.out.println("Reading file");   

            BufferedReader in2 = new BufferedReader(new InputStreamReader(   

                    new GZIPInputStream(new FileInputStream("D:\\test.gz"))));   

            String s;   

            while((s=in2.readLine()) != null){   

                System.out.println(s);   

            }   

  

        } catch (FileNotFoundException e) {   

            e.printStackTrace();   

        } catch (IOException e) {   

            e.printStackTrace();   

        }   

    }   

}