查询方式
说明
setSqlSelect
设置 SELECT 查询字段
where
WHERE 语句，拼接 +?WHERE 条件
and
AND 语句，拼接 +?AND 字段=值
andNew
AND 语句，拼接 +?AND (字段=值)
or
OR 语句，拼接 +?OR 字段=值
orNew
OR 语句，拼接 +?OR (字段=值)
eq
等于=
allEq
基于 map 内容等于=
ne
不等于<>
gt
大于>
ge
大于等于>=
lt
小于<
le
小于等于<=
like
模糊查询 LIKE
notLike
模糊查询 NOT LIKE
in
IN 查询
notIn
NOT IN 查询
isNull
NULL 值查询
isNotNull
IS NOT NULL
groupBy
分组 GROUP BY
having
HAVING 关键词
orderBy
排序 ORDER BY
orderAsc
ASC 排序 ORDER BY
orderDesc
DESC 排序 ORDER BY
exists
EXISTS 条件语句
notExists
NOT EXISTS 条件语句
between
BETWEEN 条件语句
notBetween
NOT BETWEEN 条件语句
addFilter
自由拼接 SQL
last
拼接在最后，例如：last(“LIMIT 1”)
public User getByIdNumber(Long idNumber) {
QueryWrapper<User> queryWrapper = new QueryWrapper();
queryWrapper.lambda()
.eq(User::getIdNumber, idNumber)
.gt(User::getIdAuthStatus, 0);
return userMapper.selectOne(queryWrapper);
}
and ( pid = 0 or pid is null) 用法
QueryWrapper<Resource> queryWrapper = new QueryWrapper();
queryWrapper.and(wrapper -> wrapper.eq("pid", "0").or().isNull("pid"));
queryWrapper.orderByAsc("sort");
List<Resource> list = resourceMapper.selectList(queryWrapper);
