MyBatis分页查询：MyBatis PageHelper

1. 添加Maven依赖

    com.github.pagehelper
    pagehelper-spring-boot-starter
    1.2.5

2.controller层

/**
 * 分页查询
 * @param pageNum 记录页数
 * @param pageSize 单页记录数量
 * @return
 */
@ResponseBody
@RequestMapping("/findPage")
public List findPage(@RequestParam int pageNum, @RequestParam int pageSize) {
    // 设置分页查询参数
    PageHelper.startPage(pageNum,pageSize);
    List studentList = studentService.findList();		//mapper里面的sql不需要写limit,就按照不分页的sql写即可

    for(Student student : studentList) {
        System.out.println("element : " + student);
    }

    // 封装分页查询结果到 PageInfo 对象中以获取相关分页信息
    PageInfo pageInfo = new PageInfo( studentList );
    System.out.println("总页数: " + pageInfo.getPages());
    System.out.println("总记录数: " + pageInfo.getTotal());
    System.out.println("当前页数: " + pageInfo.getPageNum());
    System.out.println("当前页面记录数量: " + pageInfo.getSize());

    return pageInfo.getList();

}