在springboot工程下的pom.xml中添加依赖

   com.github.pagehelper    pagehelper-spring-boot-starter    1.2.5        org.mybatis.spring.boot      mybatis-spring-boot-starter      2.1.1

在工程的配置Application文件中添加如下代码

#pagehelper分页插件配置pagehelper.helperDialect=mysqlpagehelper.reasonable=truepagehelper.supportMethodsArguments=truepagehelper.params=count=countSql

对service层的更改

@Servicepublic class UserService2 {  @Autowired  private UserDao userDao;  public PageInfo queryAll(Integer page, Integer pageSize ){    PageHelper.startPage(page,pageSize);//分页起始码以及每页页数    List users=userDao.selectAll();    PageInfo pageInfo=new PageInfo(users);    return pageInfo;  }

对controller层的更改

@Controllerpublic class UserController2 {  @Autowired  private UserService2 userService2;  @RequestMapping("queryAll")  @ResponseBody  public List query(@RequestParam(value="page",defaultValue="1")Integer page, @RequestParam(value="pageSize",defaultValue="2")Integer pageSize){    PageInfo pageInfo=userService2.queryAll(page,pageSize);    return pageInfo.getList();  }}