code: void init(BuildSource source) {
          this.sqlInfo = source.getSqlInfo();
          this.join = sqlInfo.getJoin();
          this.params = sqlInfo.getParams();
          this.context = source.getParamObj();
          this.prefix = source.getPrefix();
          this.suffix = source.getSuffix();
      }
docs: 根据构建的资源参数初始化数据.
  @param source 构建sql的相关参数