pagehelper和springboot混合使用

<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper-spring-boot-starter</artifactId>
			<version>1.3.0</version>
		</dependency>

pagehelper:
  helper-dialect: mysql
  reasonable: true
  support-methods-arguments: true
  params: count=countsql

@RequestMapping("/test3")
    public String test3(){
        PageHelper.startPage(1,10);
        PageInfo<TestVo> pageInfo = new PageInfo<>(testMapper.selectAll());
        System.out.println(pageInfo.getList());
        System.out.println(pageInfo.getTotal());
        return pageInfo.getList().toString();
    }