1.引入依赖 

    <!-- pagehelper 分页插件 --><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper-spring-boot-starter</artifactId><version>1.4.7</version></dependency>

2.application.yml 配置

# PageHelper分页插件
pagehelper:helperDialect: mysqlsupportMethodsArguments: trueparams: count=countSql

3.PageUtil

/*** 分页工具类* @author: jzm   */
public class PageUtil
{private static <T> Page<T> _startPage(int pageNum, int pageSize, ISelect select, String orderBy){Page<T> page = PageHelper.startPage(pageNum, pageSize).doSelectPage(select);if (orderBy == null){return page;}page.setOrderBy(orderBy);return page;}/*** 分页** @param select : () -> userMapper.list()*/public static <T> PageInfo<T> startPage(int pageNum, int pageSize, ISelect select){return new PageInfo<>(_startPage(pageNum, pageSize, select, null));}/*** 降序 + 分页*/public static <T> PageInfo<T> orderByDesc(int pageNum, int pageSize, String filed, ISelect select){return new PageInfo<>(_startPage(pageNum, pageSize, select, filed + " desc"));}/*** 升序 + 分页*/public static <T> PageInfo<T> orderByAsc(int pageNum, int pageSize, String filed, ISelect select){return new PageInfo<>(_startPage(pageNum, pageSize, select, filed + " asc"));}/*** 清理分页的线程变量*/public static void clearPage(){PageHelper.clearPage();}}

 4. 测试

   @Testpublic void mapperTest(){PageInfo<Object> pageInfo = PageUtil.startPage(1, 10, () ->{service.findUserList(); // 要执行的service、mappere查询操作都可以});System.out.println(12);}

调试看一波。嗯...