Java字串壓縮儲存

import java.io.ByteArrayInputStream;  import java.io.ByteArrayOutputStream;  import java.io.IOException;  import java.util.zip.GZIPInputStream;  import java.util.zip.GZIPOutputStream;    public class StringCompression {      static String  code="UTF-8";      public static String compress(String str) throws IOException {          System.out.println("壓縮之前的字串大小："+str.length());          if (str == null || str.length() == 0) {              return str;          }          ByteArrayOutputStream out = new ByteArrayOutputStream();          GZIPOutputStream gzip = new GZIPOutputStream(out);          gzip.write(str.getBytes());          gzip.close();          return out.toString("ISO-8859-1");      }        public static String uncompress(String str) throws IOException {          System.out.println("壓縮之後的字串大小："+str.length());          if (str == null || str.length() == 0) {              return str;          }          ByteArrayOutputStream out = new ByteArrayOutputStream();          ByteArrayInputStream in = new ByteArrayInputStream(str.getBytes("ISO-8859-1"));          GZIPInputStream gunzip = new GZIPInputStream(in);          byte[] buffer = new byte[256];          int n;          while ((n = gunzip.read(buffer)) >= 0) {              out.write(buffer, 0, n);          }          return out.toString();      }        public static void main(String[] args) throws IOException {                System.out.println(StringCompression.compress("fdsagagdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss"));        System.out.println(StringCompression.uncompress(StringCompression.compress("fsafgdfdsgfdgfdghfhgfhgfhdgdsfagdsgdasgddddddddddddddddddddddddd")));    }}