springboot使用mybatis的pagehelper插件实现分页功能

pom.xml文件引入jar包

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <groupId>com.zhiyigroupId>
    <artifactId>campusjobartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>campusjobname>
    <description>Demo project for Spring Bootdescription>

    <properties>
        <java.version>1.8java.version>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-jdbcartifactId>
            <version>2.1.6.RELEASEversion>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
            <version>2.1.6.RELEASEversion>
        dependency>

        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.46version>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <version>2.1.6.RELEASEversion>
            <scope>testscope>
        dependency>

        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druidartifactId>
            <version>1.1.10version>
        dependency>

        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <version>1.16.10version>
        dependency>

        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>fastjsonartifactId>
            <version>1.2.45version>
        dependency>

        <dependency>
            <groupId>com.baomidougroupId>
            <artifactId>mybatis-plus-boot-starterartifactId>
            <version>3.0.6version>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-thymeleafartifactId>
            <version>2.1.6.RELEASEversion>
        dependency>

        <dependency>
            <groupId>com.github.pagehelpergroupId>
            <artifactId>pagehelper-spring-boot-starterartifactId>
            <version>1.2.10version>
        dependency>

    dependencies>

    <build>
        <finalName>buickviewfinalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                <version>2.3.2version>
                <configuration>
                    <source>1.8source>
                    <target>1.8target>
                    <encoding>UTF-8encoding>
                configuration>
            plugin>
        plugins>
    build>
project>

application.properties配置

#pagehelper
#配置helperDialect属性来指定分页插件使用哪种数据库
pagehelper.helperDialect=MySQL
#分页合理化参数，默认值为false。当该参数设置为 true 时，pageNum<=0 时会查询第一页， pageNum>pages（超过总数时），会查询最后一页。默认false 时，直接根据参数进行查询
pagehelper.reasonable=false
#支持通过 Mapper 接口参数来传递分页参数，默认值false，分页插件会从查询方法的参数值中，自动根据上面 params 配置的字段中取值，查找到合适的值时就会自动分页
pagehelper.supportMethodsArguments=false

pagehelper.params=count=countSql
#默认值为 false，该参数对使用 RowBounds 作为分页参数时有效。 当该参数设置为 true 时，会将 RowBounds 中的 offset 参数当成 pageNum 使用，可以用页码和页面大小两个参数进行分页
pagehelper.offsetAsPageNum=true
#默认值为 false，当该参数设置为 true 时，如果 pageSize=0 或者 RowBounds.limit = 0 就会查询出全部的结果（相当于没有执行分页查询，但是返回结果仍然是 Page 类型）
pagehelper.pageSizeZero=true

使用

@Service
public class IndexService {
     

    @Autowired
    private IndexMapper indexMapper;

    //通过分页的形式查看所有学校
    public PageInfo<School> getAllSchool(int page,int pageSize){
     
        PageHelper.startPage(page,pageSize);
        List<School> schoolList = indexMapper.getAllSchool();
        PageInfo<School> pageInfo = new PageInfo<School>(schoolList);
        System.out.println(pageInfo);
        return pageInfo;
    }

}