SpringBoot集成MyBatis的分页插件PageHelper--详细步骤

1.pom中添加依赖包

         <!--pageHelper基本依赖 -->
         <dependency>
             <groupId>com.github.pagehelper</groupId>
             <artifactId>pagehelper</artifactId>
             <version>5.1.2</version>
         </dependency>
         <!-- 在我的实验中不加这两个依赖分页不会成功 -->
         <dependency>
             <groupId>com.github.pagehelper</groupId>
             <artifactId>pagehelper-spring-boot-autoconfigure</artifactId>
             <version>1.2.5</version>
         </dependency>
         <dependency>
             <groupId>com.github.pagehelper</groupId>
             <artifactId>pagehelper-spring-boot-starter</artifactId>
             <version>1.2.5</version>
         </dependency>

2.配置分页插件

　　下面二者选一配置

2.1.application.properties配置

　　在application.properties文件中添加如下配置

 #分页插件
 pagehelper.helper-dialect=MYSQL
 pagehelper.reasonable=true
 pagehelper.support-methods-arguments=true
 pagehelper.params=count=countSql

2.2.配文件配置对象

 package com.qiaXXXXXX.config;

 import com.github.pagehelper.PageHelper;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;

 import java.util.Properties;

 /**
  * @Copyright (C) 四川XXXX
  * @Author: LI
  * @Date: 7/1 11:01
  * @Description:
  */
 @Configuration
 public class PageHelperConfig {
     @Bean
     public PageHelper getPageHelper() {
         PageHelper pageHelper = new PageHelper();
         Properties properties = new Properties();
         properties.setProperty("helperDialect", "mysql");
         properties.setProperty("reasonable", "true");
         properties.setProperty("supportMethodsArguments", "true");
         properties.setProperty("params", "count=countSql");
         pageHelper.setProperties(properties);
         return pageHelper;
     }

 }

3.分页实现

    @Override
    public PageInfo<MyOrderVo> getMyOrder(MyOrderObj obj) {
        if (StringUtils.isEmpty(obj.getQueryMonth())) {
            String endMonth = DateUtil.getEndMonth();
            obj.setStartMonth(DateUtil.getStartMonth(endMonth));
            obj.setEndMonth(endMonth);
        } else {
            obj.setStartMonth(null);
            obj.setEndMonth(null);
        }
        //设置分页参数
        PageHelper.startPage(obj.getPageNo(), obj.getPageSize());

        //查询列表数据
        List<MyOrderVo> list = userCenterMapper.getMyOrder(obj);

        //获取分页对象
        PageInfo<MyOrderVo> pageInfo = new PageInfo<>(list);
        return pageInfo;
    }

　　注意:有了分页插件,sql语句不需要写limit,插件会在执行的sql中自动添加,也不需要自己单独写count语句获取总共条数,分页插件会自动获取.