string clob/blob 互转

String s1="1231dsdgasd的飒飒大";     

      Clob c = new SerialClob(s1.toCharArray());//String 转 clob
      Blob b = new SerialBlob(s1.getBytes("GBK"));//String 转 blob

//      也可以这样不传字符集名称，默认使用系统的
//      Blob b = new SerialBlob(s1.getBytes());      

      String clobString = c.getSubString(1, (int) c.length());//clob 转 String
      String blobString = new String(b.getBytes(1, (int) b.length()),"GBK");//blob 转 String

//      前面若没传入字符集名称，则这里也不需要传入，以免出错
//      String blobString = new String(b.getBytes(1, (int) b.length()));      

      System.out.println(clobString);
      System.out.println(blobString);