oarcle wm_concat 值过长解决--使用 clob

sql 语句替换 ：
select XMLAGG(XMLELEMENT(a, WSODETAILPALINCD || ',')).EXTRACT('//text()').getclobval() as wdpcdss from tablename a

// java 中 用java.sql.Clob 接收

//clob 转字符串

public static String ClobToString(Clob clob)  {
   String reString = "";
   try{
      Reader is = clob.getCharacterStream();// 得到流
      BufferedReader br = new BufferedReader(is);
      String s = br.readLine();
      StringBuffer sb = new StringBuffer();
      while (s != null) {// 执行循环将字符串全部取出付值给StringBuffer由StringBuffer转成STRING
         sb.append(s);
         s = br.readLine();
      }
      reString = sb.toString();
   }catch (Exception e){

   }
   return reString;
}