1、 Problem cause – dependency conflict and error reporting

 <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.10</version>
            <exclusions>
                <exclusion>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis-spring</artifactId>
                </exclusion>
            </exclusions>
 </dependency>

Exclude mybatis dependencies.

2、 Plug in configuration

Application profile

#pagehelper
pagehelper.helperDialect=mysql
pagehelper.reasonable=false
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql