 <!--分頁(yè)插件 pagehelper -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <!-- 特別注意版本問(wèn)題 -->
            <version>1.2.13</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.18</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.1</version>
        </dependency>

yaml配置

#整合數(shù)據(jù)源
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: ok
    url: jdbc:mysql://localhost:3306/mall?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8
#Mybatis-Plus的配置
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl # 配置在控制臺(tái)打印 sql語(yǔ)句
  # 配置自定義sql語(yǔ)句的 *mapper.xml 文件位置
  mapper-locations: classpath:**/mapper/**.xml
pagehelper:
  helperDialect: mysql
  reasonable: true
  supportMethodsArguments: true
  params: count=countSql

項(xiàng)目示例結(jié)構(gòu)

CategoryDao

因?yàn)槭褂昧薓ybatisPlus所以有些方法可以不去實(shí)現(xiàn)，通過(guò)Plus自己編寫(xiě)

@Mapper
public interface CategoryDao extends BaseMapper<Category> {
}

CateService接口

import cn.pojo.Category;
import java.util.*;
public interface CateService {
    public List<Category> pageSelect(int page,int col);
}

CateServiceImple實(shí)現(xiàn)

import javax.annotation.Resource;
import java.util.List;
@Service
public class CateServiceImple implements CateService {
    @Resource
    CategoryDao categoryDao;
    @Override
    public List<Category> pageSelect(int page, int col) {
//        使用分頁(yè)表明，從第幾頁(yè)開(kāi)始，一頁(yè)多少條數(shù)據(jù)
        PageHelper.startPage(page,col);
		
//        使用Plus進(jìn)行查詢(xún)所有，因?yàn)镻ageHelper插件會(huì)進(jìn)行sql的limit的拼接
        List<Category> categories = categoryDao.selectList(null);

        return categories;
    }
}

核心代碼

//        使用分頁(yè)表明，從第幾頁(yè)開(kāi)始，一頁(yè)多少條數(shù)據(jù)
        PageHelper.startPage(page,col);
//        使用Plus進(jìn)行查詢(xún)所有，因?yàn)镻ageHelper插件會(huì)進(jìn)行sql的limit的拼接
        List<Category> categories = categoryDao.selectList(null);

查看結(jié)果