private Map<String, Double> queryWeight() { QueryWrapper<TagWeight> wrapper = new QueryWrapper<>(); wrapper.lambda().likeRight(TagWeight::getTagType, "101109"); List<TagWeight> list = tagWeightService.list(wrapper); if (CollectionUtils.isEmpty(list)) { return Maps.newHashMap(); return li...
public List<DimDict> listByDictCode(DictCodeEnum dictCodeEnum) { LambdaQueryWrapper<DimDict> wrapper = Wrappers.lambdaQuery();wrapper.eq(DimDict::getDictCode, dictCodeEnum.getCode()) .eq(DimDict::getEnabled, DictEnableEnum.VALID.getType()); return this.list(wrapper); 2、【范围:(between、no...
public List<User> listUsersByGender(String gender) { LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>(); wrapper.eq(User::getGender, gender).orderByDesc(User::getCreateTime); /** *LambdaQueryWrapper常用方法 */ wrapper.eq("实体类::查询字段", "条件值"); //相当于where条件 wrapper...
private Map queryWeight() { QueryWrapper wrapper = new QueryWrapper<>(); wrapper.lambda().likeRight(TagWeight::getTagType, "101109"); List list = tagWeightService.list(wrapper); if (CollectionUtils.isEmpty(list)) { return Maps.newHashMap(); return list.stream().collect(Collectors.toMap(Tag...
@ServicepublicclassUserService{@AutowiredprivateUserDao userDao;publicList<User>listUsersByGender(String gender){ LambdaQueryWrapper<User> wrapper =newLambdaQueryWrapper<>(); wrapper.eq(User::getGender, gender).orderByDesc(User::getCreateTime);/** ...
List<User> users =newLambdaQueryChainWrapper<User>(userMapper) .like(User::getName,"雨").ge(User::getAge,20).list(); users.forEach(System.out::println); } 五、lambda在分页中的应用 MP的分页操作 baseMapper接口提供两种分页方法来实现物理分页(注:导包时导MP的包)第一个返回实体对象 允许null...
privateMap<String,Double>queryWeight(){QueryWrapper<TagWeight>wrapper=newQueryWrapper<>();wrapper.lambda().likeRight(TagWeight::getTagType,"101109");List<TagWeight>list=tagWeightService.list(wrapper);if(CollectionUtils.isEmpty(list)){returnMaps.newHashMap();returnlist.stream().collect(Collectors.toM...
{public static void main(String[] args) {// 使用Lambda表达式创建查询条件QueryWrapper<User> queryWrapper = Wrappers.<User>lambdaQuery().ge(User::getAge, 30);// 执行查询List<User> userList = userDao.selectList(queryWrapper);// 输出查询结果for (User user : userList) {System.out.println(...
com.baomidou.mybatisplus.core.toolkit.support.SerializedLambda@resolve(SFunction);/*** 通过反序列化转换 lambda 表达式,该方法只能序列化 lambda 表达式,不能序列化接口实现或者正常非 lambda 写法的对象** @param lambda lambda对象* @return 返回解析后的 SerializedLambda*/publicstaticSerializedLambdaresolve(S...
/** * 自定义sql 使用 * Dao层 代码: * * @Select("select * from ${ew.customSqlSegment}") * List<User> selectAll(@Param(Constants.WRAPPER)Wrapper<User> wrapper); */ @Test public void selectLambda4my() { LambdaQueryWrapper<User> lambda3 = Wrappers.<User>lambdaQuery(); lambda3.like...