The use and difference between PageHelper and MyBatisPlus IPage paging plugin

MyBatisPlus IPage pagination plug-in I specially compiled an article as follows

Mybatis plus paging plug-in: PageHelper+BootStrap+Vue+axios realizes paging function

Next, introduce GitHub's PageHelper

First import dependencies

   <!--springboot整合pagehelper-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>

RequestParam.java

@Data//Lombok插件
public class RequestParam<T> {
    private Integer pageNum;
    private Integer pageSize;
    private T data;

}

service layer (the following Goods are my entity classes and can be changed according to your own needs)

 HttpResult<?> queryGoodByNameAndStatus(RequestParam<Goods>  param);

Service layer implementation class

  @Override
    public HttpResult<?> queryGoodByNameAndStatus(RequestParam<Goods> param) {
        //分页开始
        PageHelper.startPage(param.getPageNum(),param.getPageSize());
        //调用mapper层接口
        List<Goods> goods = goodMapper.queryGoodByNameAndStatus(param.getData().getName(), 0);
        //把mapper接口返回参数放入pageInfo
        PageInfo pageInfo=new PageInfo(goods);
        return new HttpResult<>().ok(pageInfo);
    }

Controller layer

   @PostMapping("queryGood")
    public HttpResult<?> queryGood(@RequestBody RequestParam<Goods> requestParam) {
        log.info(JSON.toJSONString(requestParam));
        return userService.queryGoodByNameAndStatus(requestParam);
    }

 

Summarize:

IPage is a plug-in that comes with MybatisPlus and does not need to introduce additional dependencies, but query paging needs to define a special interface that contains parameters of the IPage type.

PageHelper needs to introduce additional dependencies, but it is not mandatory to use a special interface containing paging parameters, and you can directly use the existing List query interface.