MyBatis-Plus 高级查询

本是古典何须时尚 2022-09-14 09:19 381阅读 0赞

# 一 wrapper介绍 #

### 1 类图 ###

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16][]

### 2 说明 ###

Wrapper ： 条件构造抽象类，最顶端父类

AbstractWrapper ： 用于查询条件封装，生成 sql 的 where 条件

QueryWrapper ： 查询条件封装

UpdateWrapper ： Update 条件封装

AbstractLambdaWrapper ： 使用Lambda 语法

LambdaQueryWrapper ：用于Lambda语法使用的查询Wrapper

LambdaUpdateWrapper ： Lambda 更新封装Wrapper

# 二 查询方式说明 #

<table> 
 <tbody> 
  <tr> 
   <td style="border-color:#bbbbbb;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">查询方式</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">说明</span></strong> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">setSqlSelect</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">设置</span> 
     <span style="color:#2b333b;">SELECT</span> 
     <span style="color:#2b333b;">查询字段</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">where</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">WHERE</span> 
     <span style="color:#2b333b;">语句，拼接</span> 
     <span style="color:#2b333b;">+&nbsp;</span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">WHERE</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">条件</span></span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">and</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">AND</span> 
     <span style="color:#2b333b;">语句，拼接</span> 
     <span style="color:#2b333b;">+&nbsp;</span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">AND</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">字段</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">=</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">值</span></span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">andNew</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">AND</span> 
     <span style="color:#2b333b;">语句，拼接</span> 
     <span style="color:#2b333b;">+&nbsp;</span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">AND (</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">字段</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">=</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">值</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">)</span></span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">or</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">OR</span> 
     <span style="color:#2b333b;">语句，拼接</span> 
     <span style="color:#2b333b;">+&nbsp;</span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">OR</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">字段</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">=</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">值</span></span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">orNew</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">OR</span> 
     <span style="color:#2b333b;">语句，拼接</span> 
     <span style="color:#2b333b;">+&nbsp;</span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">OR (</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">字段</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">=</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">值</span></span> 
     <span style="background-color:#f3f3f3;"><span style="color:#c7254e;">)</span></span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">eq</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">等于</span> 
     <span style="color:#2b333b;">=</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">allEq</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">基于</span> 
     <span style="color:#2b333b;">map</span> 
     <span style="color:#2b333b;">内容等于</span> 
     <span style="color:#2b333b;">=</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">ne</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">不等于</span> 
     <span style="color:#2b333b;">&lt;&gt;</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">gt</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">大于</span> 
     <span style="color:#2b333b;">&gt;</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">ge</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">大于等于</span> 
     <span style="color:#2b333b;">&gt;=</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">lt</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">小于</span> 
     <span style="color:#2b333b;">&lt;</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">le</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">小于等于</span> 
     <span style="color:#2b333b;">&lt;=</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">like</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">模糊查询</span> 
     <span style="color:#2b333b;">LIKE</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">notLike</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">模糊查询</span> 
     <span style="color:#2b333b;">NOT LIKE</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">in</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">IN</span> 
     <span style="color:#2b333b;">查询</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">notIn</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">NOT IN</span> 
     <span style="color:#2b333b;">查询</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">isNull</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">NULL</span> 
     <span style="color:#2b333b;">值查询</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">isNotNull</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">IS NOT NULL</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">groupBy</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">分组</span> 
     <span style="color:#2b333b;">GROUP BY</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">having</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">HAVING</span> 
     <span style="color:#2b333b;">关键词</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">orderBy</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">排序</span> 
     <span style="color:#2b333b;">ORDER BY</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">orderAsc</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">ASC</span> 
     <span style="color:#2b333b;">排序</span> 
     <span style="color:#2b333b;">ORDER BY</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">orderDesc</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">DESC</span> 
     <span style="color:#2b333b;">排序</span> 
     <span style="color:#2b333b;">ORDER BY</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">exists</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">EXISTS</span> 
     <span style="color:#2b333b;">条件语句</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">notExists</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">NOT EXISTS</span> 
     <span style="color:#2b333b;">条件语句</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">between</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">BETWEEN</span> 
     <span style="color:#2b333b;">条件语句</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">notBetween</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">NOT BETWEEN</span> 
     <span style="color:#2b333b;">条件语句</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">addFilter</span></strong> 
    </div> </td> 
   <td style="background-color:#f1f1f1;"> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">自由拼接</span> 
     <span style="color:#2b333b;">SQL</span> 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div style="text-align:justify;"> 
     <strong><span style="color:#2b333b;">last</span></strong> 
    </div> </td> 
   <td> 
    <div style="text-align:justify;"> 
     <span style="color:#2b333b;">拼接在最后，例如：</span> 
     <span style="color:#2b333b;">last(“LIMIT 1”)</span> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

# 三 实战 #

### 0 数据库 ###

mysql> select * from user;
    +---------------------+--------------+------+--------------------+---------------------+---------------------+---------+---------+
    | id                  | NAME         | age  | email              | create_time         | update_time         | version | deleted |
    +---------------------+--------------+------+--------------------+---------------------+---------------------+---------+---------+
    |                   0 | auto         |   21 | 1243@qq.com        | NULL                | NULL                |    NULL |       0 |
    |                   2 | Jack         |   20 | test2@baomidou.com | NULL                | NULL                |    NULL |       0 |
    |                   3 | Tom          |   28 | test3@baomidou.com | NULL                | NULL                |    NULL |       0 |
    | 1443158688033337346 | lucymaryupup |   20 | 1243@qq.com        | NULL                | 2021-09-30 08:51:12 |    NULL |       0 |
    | 1443378040145903617 | ASSIGN_ID    |   25 | 1243@qq.com        | 2021-09-30 08:51:56 | 2021-09-30 08:51:56 |    NULL |       0 |
    | 1444224656633389058 | luojishanch  |   20 | 1243@qq.com        | 2021-10-02 16:56:05 | 2021-10-02 16:56:05 |       1 |       0 |
    +---------------------+--------------+------+--------------------+---------------------+---------------------+---------+---------+
    6 rows in set (0.00 sec)

### 1 ge、gt、le、lt、isNull、isNotNull ###

代码

@Test
        public void testSelect() {
           QueryWrapper<User> queryWrapper = new QueryWrapper<>();
            // ge、gt、le、lt
           queryWrapper.ge("age", 21);
           List<User> users = userMapper.selectList(queryWrapper);
           System.out.println(users);
        }

测试结果

Creating a new SqlSession
    SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1e54cb33] was not registered for synchronization because synchronization is not active
    2021-10-03 10:20:51.303  INFO 10576 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
    2021-10-03 10:20:52.530  INFO 10576 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
    JDBC Connection [HikariProxyConnection@784556863 wrapping com.mysql.cj.jdbc.ConnectionImpl@1d5d5621] will not be managed by Spring
    ==>  Preparing: SELECT id,name,age,email,create_time,update_time,version,deleted FROM user WHERE deleted=0 AND (age >= ?)
    ==> Parameters: 21(Integer)
    <==    Columns: id, name, age, email, create_time, update_time, version, deleted
    <==        Row: 0, auto, 21, 1243@qq.com, null, null, null, 0
    <==        Row: 3, Tom, 28, test3@baomidou.com, null, null, null, 0
    <==        Row: 1443378040145903617, ASSIGN_ID, 25, 1243@qq.com, 2021-09-30 08:51:56, 2021-09-30 08:51:56, null, 0
    <==      Total: 3
    Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1e54cb33]
    [User(id=0, name=auto, age=21, email=1243@qq.com, createTime=null, updateTime=null, version=null, deleted=0), User(id=3, name=Tom, age=28, email=test3@baomidou.com, createTime=null, updateTime=null, version=null, deleted=0), User(id=1443378040145903617, name=ASSIGN_ID, age=25, email=1243@qq.com, createTime=Thu Sep 30 08:51:56 CST 2021, updateTime=Thu Sep 30 08:51:56 CST 2021, version=null, deleted=0)]

### 2 eq、ne ###

注意：seletOne()返回的是一条实体记录，当出现多条时会报错

代码

@Test
    public void testSelectOne() {
        QueryWrapper<User>queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("name", "Tom");
        User user = userMapper.selectOne(queryWrapper); // 只能返回一条记录，多余一条则抛出异常
        System.out.println(user);
    }

测试结果

Creating a new SqlSession
    SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7965a51c] was not registered for synchronization because synchronization is not active
    2021-10-03 10:23:14.853  INFO 4648 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
    2021-10-03 10:23:16.002  INFO 4648 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
    JDBC Connection [HikariProxyConnection@1291485735 wrapping com.mysql.cj.jdbc.ConnectionImpl@78226c36] will not be managed by Spring
    ==>  Preparing: SELECT id,name,age,email,create_time,update_time,version,deleted FROM user WHERE deleted=0 AND (name = ?)
    ==> Parameters: Tom(String)
    <==    Columns: id, name, age, email, create_time, update_time, version, deleted
    <==        Row: 3, Tom, 28, test3@baomidou.com, null, null, null, 0
    <==      Total: 1
    Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7965a51c]
    User(id=3, name=Tom, age=28, email=test3@baomidou.com, createTime=null, updateTime=null, version=null, deleted=0)

### 3 between、notBetween ###

包含大小边界

代码

@Test
    public void testSelectCount() {
        QueryWrapper<User>queryWrapper = new QueryWrapper<>();
        queryWrapper.between("age", 20, 30);
        Integer count = userMapper.selectCount(queryWrapper); // 返回数据数量
        System.out.println(count);
    }

测试结果

Creating a new SqlSession
    SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@33cbfa57] was not registered for synchronization because synchronization is not active
    2021-10-03 10:24:52.301  INFO 1752 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
    2021-10-03 10:24:53.598  INFO 1752 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
    JDBC Connection [HikariProxyConnection@364389956 wrapping com.mysql.cj.jdbc.ConnectionImpl@20576557] will not be managed by Spring
    ==>  Preparing: SELECT COUNT( 1 ) FROM user WHERE deleted=0 AND (age BETWEEN ? AND ?)
    ==> Parameters: 20(Integer), 30(Integer)
    <==    Columns: COUNT( 1 )
    <==        Row: 6
    <==      Total: 1
    Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@33cbfa57]
    6

### 4 like、notLike、likeLeft、likeRight ###

selectMaps()返回Map集合列表，通常配合select()使用

代码

@Test
    public void testSelectMaps() {
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper
                .select("name", "age")
                .like("name", "o")
                .likeRight("email", "t");
        List<Map<String, Object>> maps = userMapper.selectMaps(queryWrapper); // 返回值是Map列表
        maps.forEach(System.out::println);
    }

测试结果

Creating a new SqlSession
    SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7965a51c] was not registered for synchronization because synchronization is not active
    2021-10-03 10:30:28.838  INFO 8232 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
    2021-10-03 10:30:30.051  INFO 8232 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
    JDBC Connection [HikariProxyConnection@1291485735 wrapping com.mysql.cj.jdbc.ConnectionImpl@78226c36] will not be managed by Spring
    ==>  Preparing: SELECT name,age FROM user WHERE deleted=0 AND (name LIKE ? AND email LIKE ?)
    ==> Parameters: %o%(String), t%(String)
    <==    Columns: name, age
    <==        Row: Tom, 28
    <==      Total: 1
    Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7965a51c]
    {name=Tom, age=28}

### 5 orderBy、orderByDesc、orderByAsc ###

代码

@Test
    public void testSelectListOrderBy() {
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.orderByDesc("age", "id");
        List<User> users = userMapper.selectList(queryWrapper);
        users.forEach(System.out::println);
    }

测试结果

Creating a new SqlSession
    SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@834831b] was not registered for synchronization because synchronization is not active
    2021-10-03 10:52:52.112  INFO 18224 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
    2021-10-03 10:52:53.322  INFO 18224 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
    JDBC Connection [HikariProxyConnection@1594981181 wrapping com.mysql.cj.jdbc.ConnectionImpl@1174a305] will not be managed by Spring
    ==>  Preparing: SELECT id,name,age,email,create_time,update_time,version,deleted FROM user WHERE deleted=0 ORDER BY age DESC,id DESC
    ==> Parameters:
    <==    Columns: id, name, age, email, create_time, update_time, version, deleted
    <==        Row: 3, Tom, 28, test3@baomidou.com, null, null, null, 0
    <==        Row: 1443378040145903617, ASSIGN_ID, 25, 1243@qq.com, 2021-09-30 08:51:56, 2021-09-30 08:51:56, null, 0
    <==        Row: 0, auto, 21, 1243@qq.com, null, null, null, 0
    <==        Row: 1444224656633389058, luojishanch, 20, 1243@qq.com, 2021-10-02 16:56:05, 2021-10-02 16:56:05, 1, 0
    <==        Row: 1443158688033337346, lucymaryupup, 20, 1243@qq.com, null, 2021-09-30 08:51:12, null, 0
    <==        Row: 2, Jack, 20, test2@baomidou.com, null, null, null, 0
    <==      Total: 6
    Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@834831b]
    User(id=3, name=Tom, age=28, email=test3@baomidou.com, createTime=null, updateTime=null, version=null, deleted=0)
    User(id=1443378040145903617, name=ASSIGN_ID, age=25, email=1243@qq.com, createTime=Thu Sep 30 08:51:56 CST 2021, updateTime=Thu Sep 30 08:51:56 CST 2021, version=null, deleted=0)
    User(id=0, name=auto, age=21, email=1243@qq.com, createTime=null, updateTime=null, version=null, deleted=0)
    User(id=1444224656633389058, name=luojishanch, age=20, email=1243@qq.com, createTime=Sat Oct 02 16:56:05 CST 2021, updateTime=Sat Oct 02 16:56:05 CST 2021, version=1, deleted=0)
    User(id=1443158688033337346, name=lucymaryupup, age=20, email=1243@qq.com, createTime=null, updateTime=Thu Sep 30 08:51:12 CST 2021, version=null, deleted=0)
    User(id=2, name=Jack, age=20, email=test2@baomidou.com, createTime=null, updateTime=null, version=null, deleted=0)

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