Java QueryWrapper groupBy自定义字段,以及List<Map>转List<Entity>

Java queryWrapper groupby自定义字段

java 复制代码
String sql = "data_id,(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-status') status," +
 "(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-duty-person') dutyPerson," +
"(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-tag') tag," +
"(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-level') level," +
"(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-verno') verNo";
queryWrapper.select(sql);
queryWrapper.groupBy("data_id"); // 根据group字段进行分组

List<Map>转List<Entity>

java 复制代码
List<TestItemModel> newList = JSON.parseObject(JSON.toJSONString(resultList), new TypeReference<List<TestItemModel>>() {});

连在一起看

java 复制代码
QueryWrapper<LzHtml> queryWrapper = new QueryWrapper<>();
queryWrapper.eq("file_id", filter.getFileId());
queryWrapper.in("data_id", datas);
 String sql = "data_id,(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-status') status," +
 "(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-duty-person') dutyPerson," +
 "(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-tag') tag," +
 "(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-level') level," +
 "(select value from lz_html a where a.data_id = lz_html.data_id and class_name='test-item-verno') verNo";
queryWrapper.select(sql);
queryWrapper.groupBy("data_id"); // 根据group字段进行分组
List<Map<String, Object>> resultList = lzHtmlService.listMaps(queryWrapper);
//List<Map>转List<Entity>
List<TestItemModel> newList = JSON.parseObject(JSON.toJSONString(resultList), new TypeReference<List<TestItemModel>>() {});
相关推荐
Zhangzy@1 小时前
仓颉的空安全基石:Option类型的设计与实践
java·开发语言·安全
IDOlaoluo2 小时前
FindBugs-IDEA-1.0.1.zip安装使用教程(IntelliJ IDEA插件手动安装查Bug)
java·bug·intellij-idea
程序员小凯8 小时前
Spring Boot文件处理与存储详解
java·spring boot·后端
Miraitowa_cheems9 小时前
LeetCode算法日记 - Day 88: 环绕字符串中唯一的子字符串
java·数据结构·算法·leetcode·深度优先·动态规划
黑云压城After9 小时前
vue2实现图片自定义裁剪功能(uniapp)
java·前端·javascript
zcl_199110 小时前
记一次ThreadLocal导致的生产事故
java
RoboWizard10 小时前
怎么判断我的电脑是否支持PCIe 5.0 SSD?Kingston FURY Renegade G5
java·spring·智能手机·电脑·金士顿
毕设源码-钟学长11 小时前
【开题答辩全过程】以 儿童游泳预约系统为例,包含答辩的问题和答案
java·eclipse
皮皮林55111 小时前
5种接口频率监控方案实战对比,性能、成本、复杂度全解析!
java
似水流年 光阴已逝12 小时前
从Jar包到K8s上线:全流程拆解+高可用实战
java·kubernetes·jar