Android GZIP压缩与解压工具类

import java.io.ByteArrayInputStream;  import java.io.ByteArrayOutputStream;  import java.io.IOException;  import java.util.zip.GZIPInputStream;  import java.util.zip.GZIPOutputStream;    /**  * GZIP压缩解压类  */  public class MessageGZIP {            private static String encode = "utf-8";//"ISO-8859-1"            public String getEncode() {          return encode;      }        /*      * 设置 编码，默认编码：UTF-8      */      public void setEncode(String encode) {          MessageGZIP.encode = encode;      }        /*      * 字符串压缩为字节数组      */      public static byte[] compressToByte(String str){          if (str == null || str.length() == 0) {              return null;          }          ByteArrayOutputStream out = new ByteArrayOutputStream();          GZIPOutputStream gzip;          try {              gzip = new GZIPOutputStream(out);              gzip.write(str.getBytes(encode));              gzip.close();          } catch (IOException e) {              e.printStackTrace();          }          return out.toByteArray();      }        /*      * 字符串压缩为字节数组      */      public static byte[] compressToByte(String str,String encoding){          if (str == null || str.length() == 0) {              return null;          }          ByteArrayOutputStream out = new ByteArrayOutputStream();          GZIPOutputStream gzip;          try {              gzip = new GZIPOutputStream(out);              gzip.write(str.getBytes(encoding));              gzip.close();          } catch (IOException e) {              e.printStackTrace();          }          return out.toByteArray();      }        /*      * 字节数组解压缩后返回字符串      */      public static String uncompressToString(byte[] b) {          if (b == null || b.length == 0) {              return null;          }          ByteArrayOutputStream out = new ByteArrayOutputStream();          ByteArrayInputStream in = new ByteArrayInputStream(b);            try {              GZIPInputStream gunzip = new GZIPInputStream(in);              byte[] buffer = new byte[256];              int n;              while ((n = gunzip.read(buffer)) >= 0) {                  out.write(buffer, 0, n);              }          } catch (IOException e) {              e.printStackTrace();          }          return out.toString();      }        /*      * 字节数组解压缩后返回字符串      */      public static String uncompressToString(byte[] b, String encoding) {          if (b == null || b.length == 0) {              return null;          }          ByteArrayOutputStream out = new ByteArrayOutputStream();          ByteArrayInputStream in = new ByteArrayInputStream(b);            try {              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(encoding);          } catch (IOException e) {              e.printStackTrace();          }          return null;      }  }