MyBatisPlus 條件查詢構造器（四）

1、mybatisplus——入門（一）

2、mybatisplus——準備（二）

3、mybatisplus——crud（三）

4、mybatisplus——條件查詢構造器（四）

@runwith
(springrunner.
class
)@springboottest
public
class

注意：以下條件構造器的方法入參中的 column 均表示資料庫字段

1、ge、gt、le、lt、isnull、isnotnull

@test
public
void
testdelete()

sql：update user set deleted=1 where deleted=0 and name is null and age >= ? and email is not null

2、eq、ne

注意：seletone返回的是一條實體記錄，當出現多條時會報錯

@test
public
void
testselectone()

select id,name,age,email,create_time,update_time,deleted,version from user where deleted=0 and name = ?

3、between、notbetween

@test
public
void
testselectcount()

select count(1) from user where deleted=0 and age between ? and ?

4、alleq

@test
public
void
testselectlist()

select id,name,age,email,create_time,update_time,deleted,version from user where deleted=0 and name = ? and id = ? and age = ?

5、like、notlike、likeleft、likeright

selectmaps返回map集合列表

@test
public
void
testselectmaps()

select id,name,age,email,create_time,update_time,deleted,version from user where deleted=0 and name not like ? and email like ?

6、in、notin、insql、notinsql、exists、notexists

in、notin：

insql、notinsql：可以實現子查詢

@test
public
void
testselectobjs()

select id,name,age,email,create_time,update_time,deleted,version from user where deleted=0 and id in (select id from user where id < 3)

7、or、and

不呼叫or則預設為使用 and 連

@test
public
void
testupdate1()

update user set name=?, age=?, update_time=? where deleted=0 and name like ? or age between ? and ?

8、巢狀or、巢狀and

這裡使用了lambda表示式，or中的表示式最後翻譯成sql時會被加上圓括號

@test
public
void
testupdate2()

update user set name=?, age=?, update_time=?

where deleted=0 and name like ?

or ( name = ? and age <> ? )

9、orderby、orderbydesc、orderbyasc

@test
public
void
testselectlistorderby()

select id,name,age,email,create_time,update_time,deleted,version

from user where deleted=0 order by id desc

10、last

直接拼接到 sql 的最後

注意：只能呼叫一次,多次呼叫以最後一次為準有sql注入的風險,請謹慎使用

@test
public
void
testselectlistlast()

select id,name,age,email,create_time,update_time,deleted,version

from user where deleted=0

limit 1

11、指定要查詢的列

@test
public
void
testselectlistcolumn()

select id,name,age from user where deleted=0

12、set、setsql

@test
public
void
testupdateset()

update user setage=?,update_time=?,name=?, email = 『[email protected]』 where deleted=0 and name like ?

MyBatisPlus 條件查詢構造器（四）

Mybatis plus實現條件查詢

mybatis plus 多表條件分頁查詢

MybatisPlus多條件查詢並分頁

MyBatisPlus 條件查詢構造器（四）

Mybatis plus實現條件查詢

mybatis plus 多表條件分頁查詢

MybatisPlus多條件查詢並分頁

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