MPJQueryWrapper 用法

 // 创建QueryWrapper对象MPJQueryWrapper<WebEvaluation> queryWrapper = new MPJQueryWrapper<>();// 设置要查询的字段queryWrapper.select("u.nick_name", "u.avatar_url").select("wu.nick_name as relayToUserName", "ta.content as relayParentContent").select("we.*");// 设置左连接queryWrapper.leftJoin("web_user u we.user_id = u.user_id").leftJoin("web_user wu we.reply_user_id = wu.user_id").leftJoin("web_evaluation ta we.relay_to_id_two = ta.evaluation_id");// 设置查询条件queryWrapper.isNotNull("we.reply_user_id").eq("we.status", 0).eq("we.del_flag", 0).eq("we.relay_to_id", 20);// 执行查询List<Map<String, Object>> result = webEvaluationMapper.selectMaps(queryWrapper);