spring boot mybatis+分页配置

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qincidong/article/details/76120968

spring boot mybatis+分页配置

本文介绍springboot项目中，如何集成mybatis的分页插件PageHelper。

1.mybatis和分页插件的依赖配置

<!-- mybatis -->
<dependency>
  <groupId>org.mybatis.spring.boot</groupId>
  <artifactId>mybatis-spring-boot-starter</artifactId>
  <version>1.1.1</version>
</dependency>

<!--mybatis分页插件-->
<dependency>
  <groupId>com.github.pagehelper</groupId>
  <artifactId>pagehelper</artifactId>
  <version>4.1.0</version>
</dependency>

2.application.yml配置

mybatis:
#mapper-locations: classpath:/mybatis/mysql/*Mapper.xml
#type-aliases-package: com.ybf.activity.web.entity
config-location: classpath:/mybatis/mybatis-config.xml
check-config-location: true

3.mybatis-config.xml配置

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="logImpl" value="LOG4J"/>
    </settings>
    <typeAliases>
        <typeAlias type="com.ybf.activity.web.entity.Student" alias="Student" />
    </typeAliases>
    <plugins>
        <!--mybatis分页插件-->
        <plugin interceptor="com.github.pagehelper.PageHelper">
            <property name="dialect" value="mysql"/>
            <property name="offsetAsPageNum" value="false"/>
            <property name="rowBoundsWithCount" value="false"/>
            <property name="pageSizeZero" value="true"/>
            <property name="reasonable" value="false"/>
            <property name="supportMethodsArguments" value="false"/>
            <property name="returnPageInfo" value="none"/>
        </plugin>
    </plugins>
    <mappers>
        <mapper resource="mybatis/mapper/mysql/StudentMapper.xml"/>
    </mappers>

</configuration>

4.spring启动类增加Mapper扫描

/**
 * Created by Administrator on 2017/7/6.
 */
@SpringBootApplication
// Mapper扫描
@MapperScan("com.ybf.activity.web.mapper")
public class WebApplication extends SpringBootServletInitializer {
    private final static Logger logger = LoggerFactory.getLogger(WebApplication.class);

    // 编码过滤器
    @Bean
    Filter characterEncodingFilter() {
        logger.info("==========初始化编码过滤器=================");
        CharacterEncodingFilter filter = new CharacterEncodingFilter();
        filter.setEncoding("UTF-8");
        filter.setForceEncoding(true);
        return filter;
    }
    public static void main(String[] args) {
        SpringApplication.run(WebApplication.class,args);
        logger.info("Application [activity-web] started!");
    }
}

5.Mapper接口

public interface StudentMapper extends BaseMapper{
    Student getById(int id);
    List<Student> sel();
}

6.StudentMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ybf.activity.web.mapper.StudentMapper">

    <resultMap id="stuMap" type="Student">
        <id property="id" column="id" />
        <result property="name" column="name" />
        <result property="sumScore" column="score_sum" />
        <result property="avgScore" column="score_avg" />
        <result property="age" column="age" />
    </resultMap>

    <select id="getById" resultMap="stuMap" resultType="Student">
        SELECT *
        FROM STUDENT a
        WHERE ID = #{id}
    </select>

    <select id="sel" resultType="Student" resultMap="stuMap">
        select * from student a
    </select>
</mapper>

注：测试的spring boot版本为1.5.4.RELEASE.

7.用法

public List<Student> selectStudentByPage(@PathVariable int pageNo) {
    if (pageNo > 0) {
        PageHelper.startPage(pageNo,3); // 设置分页，参数1=页数，参数2=每页显示条数
    }
    return studentMapper.sel();
}

更多PageHelper用法，请自行搜索。