code: static QueryMeta buildFindSql(ActiveRecord activeRecord) {
          QueryMeta queryMeta = new QueryMeta();
          String    initSql   = parseFieldsSql(activeRecord.getTableName(), null);
  
          StringBuilder sqlBuf = new StringBuilder(initSql);
  
          int[] pos = {1};
          // 解析尸体设置的
          List<Object> list = parseWhere(activeRecord, pos, sqlBuf);
          List<Object> temp = andWhere(activeRecord, pos, sqlBuf);
          if (null != temp) {
              list.addAll(temp);
          }
  
          String sql = sqlFilter(sqlBuf.toString());
          queryMeta.setSql(sql);
          queryMeta.setParams(list.toArray());
          mapping(queryMeta, activeRecord.getClass());
          return queryMeta;
      }
docs: 构造一个查询单个SQL
  
  @param activeRecord ActiveRecord对象
  @return 返回QueryMeta对象