code: public static String buildEqualsWhere(Entity entity, List<Object> paramValues) {
  		if (null == entity || entity.isEmpty()) {
  			return StrUtil.EMPTY;
  		}
  
  		final StringBuilder sb = new StringBuilder(" WHERE ");
  		boolean isNotFirst = false;
  		for (Entry<String, Object> entry : entity.entrySet()) {
  			if (isNotFirst) {
  				sb.append(" and ");
  			} else {
  				isNotFirst = true;
  			}
  			sb.append("`").append(entry.getKey()).append("`").append(" = ?");
  			paramValues.add(entry.getValue());
  		}
  
  		return sb.toString();
  	}
docs: 构件相等条件的where语句<br>
  如果没有条件语句，泽返回空串，表示没有条件
  
  @param entity 条件实体
  @param paramValues 条件值得存放List
  @return 带where关键字的SQL部分