Mybatis的分页实现方式

<select id="selectUsers" resultType="User">
  SELECT * FROM users
  LIMIT #{offset}, #{pageSize}
</select>

List<User> users = sqlSession.selectList("selectUsers", null, new RowBounds(offset, pageSize));

<dependency>
  <groupId>com.github.pagehelper</groupId>
  <artifactId>pagehelper</artifactId>
  <version>5.3.0</version>
</dependency>

<plugins>
  <plugin interceptor="com.github.pagehelper.PageInterceptor">
    <property name="helperDialect" value="mysql"/> <!-- 指定数据库类型 -->
  </plugin>
</plugins>

// 开启分页
PageHelper.startPage(pageNum, pageSize);
List<User> users = userMapper.selectUsers();
// 封装分页结果
PageInfo<User> pageInfo = new PageInfo<>(users);

<dependency>
  <groupId>com.baomidou</groupId>
  <artifactId>mybatis-plus-boot-starter</artifactId>
  <version>3.5.3.1</version>
</dependency>

@Configuration
public class MybatisPlusConfig {
  @Bean
  public MybatisPlusInterceptor mybatisPlusInterceptor() {
    MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
    interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
    return interceptor;
  }
}

// 创建分页参数
Page<User> page = new Page<>(pageNum, pageSize);
// 执行分页查询
Page<User> result = userMapper.selectPage(page, null);
// 获取分页信息
long total = result.getTotal();
List<User> users = result.getRecords();