Mybatis-plugins分页助手实现查询数据分页

其他具体代码接上文-》mybatis自定义处理器

1.导入坐标

	<dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>3.7.5</version>
    </dependency>
    <dependency>
<!--      解析器-->
      <groupId>com.github.jsqlparser</groupId>
      <artifactId>jsqlparser</artifactId>
      <version>0.9.1</version>
    </dependency>

2.在UserMapper（dao）接口中定以findAll方法

public List<User> findAll();

2.在UserMapper.xml中添加sql查询

<select id="findAll" resultType="user">
        select * from user
 </select>

3.测试

public class MapperTest {

    @Test
    public void test1() throws IOException {
        InputStream stream = Resources.getResourceAsStream("SqlMapConfig.xml");
        SqlSession sqlSession = new SqlSessionFactoryBuilder().build(stream).openSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        //        设置分页相关参数
        PageHelper.startPage(2,3);
        List<User> list = mapper.findAll();
        //获得与分页相关的参数
        PageInfo<User> pageInfo=new PageInfo<User>(list);
        System.out.println("当前页："+pageInfo.getPageNum());
        System.out.println("每页显示条数："+pageInfo.getPageSize());
        System.out.println("总条数："+pageInfo.getTotal());
        System.out.println("总页数："+pageInfo.getPages());
        System.out.println("上一页："+pageInfo.getPrePage());
        System.out.println("下一页："+pageInfo.getNextPage());
        System.out.println("是否是第一页："+pageInfo.isIsFirstPage());
        System.out.println("是否是最后一页："+pageInfo.isIsLastPage());

        for(User user:list){
            System.out.println(user);
        }
    }
}

4.结果