Mybatis分页查询

1.在maven工程中引入架包

  com.github.pagehelper
  pagehelper-spring-boot-starter
  1.2.3

2.编写测试代码

public class TestDataSource {
 
 @Test
 public void test1() throws SQLException{
  ApplicationContext ac =
    SpringApplication.run(MyBootApplication.class);
  DataSource ds = ac.getBean("druid",DataSource.class);
  System.out.println(ds);
  System.out.println(ds.getConnection());
  DeptDao deptDao = ac.getBean("deptDao",DeptDao.class);

  //PageHelper 分页 仅对紧跟后面一个查询有效  1 页数 5 条数
  PageHelper.startPage(2,3);
  List list = deptDao.loadAll();

  for(Dept dept:list){
   System.out.println(dept.getDeptno()+" "+dept.getDname());
  }
 }
 
}