java字符串的gzip压缩解压缩代码

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1、JAVA字符串的GZIP压缩解压缩代码packagecom.gzip;importjava.io.ByteArrayInputStream;   importjava.io.ByteArrayOutputStream;   importjava.io.IOException;   importjava.util.zip.GZIPInputStream;   importjava.util.zip.GZIPOutputStream;   //将一个字符串按照zip方式压缩和解压缩   publicclassZipUtil2{      //压缩    publicsta

2、ticStringcompress(Stringstr)throwsIOException{      if(str==null

3、

4、str.length()==0){       returnstr;     }      ByteArrayOutputStreamout=newByteArrayOutputStream();     GZIPOutputStreamgzip=newGZIPOutputStream(out);      gzip.write(str.getBytes());      gzip.close();     returnout.toStr

5、ing("ISO-8859-1");    }      //解压缩    publicstaticStringuncompress(Stringstr)throwsIOException{      if(str==null

6、

7、str.length()==0){        returnstr;    }     ByteArrayOutputStreamout=newByteArrayOutputStream();     ByteArrayInputStreamin=newByteArrayInputStream(str          .getBytes(

8、"ISO-8859-1"));      GZIPInputStreamgunzip=newGZIPInputStream(in);      byte[]buffer=newbyte[256];      intn;     while((n=gunzip.read(buffer))>=0){      out.write(buffer,0,n);      }      //toString()使用平台默认编码，也可以显式的指定如toString("GBK")      returnout.toString();    }      //测试方

9、法    publicstaticvoidmain(String[]args)throwsIOException{                 //测试字符串       Stringstr="%5B%7B%22lastUpdateTime%22%3A%222011-10-28+9%3A39%3A41%22%2C%22smsList%22%3A%5B%7B%22liveState%22%3A%221";                 System.out.println("原长度："+str.length());                   System

10、.out.println("压缩后："+ZipUtil2.compress(str).length());                 System.out.println("解压缩："+ZipUtil2.uncompress(ZipUtil2.compress(str)));    }    }