详解MyBatis Plus中分页插件的使用

@Configuration
public class MyBatisPlusConfig {
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        // 构造拦截器
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        // 添加分页插件
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        return interceptor;
    }
}

@Test
void contextLoads() {
    Page<User> page = new Page<>(1, 2);
    userMapper.selectPage(page, null);
    System.out.println(page);
}

@Test
void contextLoads() {
    Page<User> page = new Page<>(1, 2);
    userMapper.selectPage(page, null);
    // 获取当前页的记录
    List<User> records = page.getRecords();
    records.forEach(System.out::println);
    // 获取当前页的页码
    long current = page.getCurrent();
    System.out.println(current);
    // 获取分页的总页码数
    long size = page.getSize();
    System.out.println(size);
    // 判断是否有下一页
    boolean b = page.hasNext();
    System.out.println(b);
    // 判断是否有上一页
    boolean b1 = page.hasPrevious();
    System.out.println(b1);
}

Page<User> selectPageVo(@Param("page") Page<User> page, @Param("age") Integer age);

<select id="selectPageVo" resultType="User">
    select id,name,age,email from user where age = #{age}
</select>

mybatis-plus:
  ...
  # 配置类型别名对应的包
  type-aliases-package: com.klza.pojo

@Test
void contextLoads() {
    Page<User> page = new Page<>(1, 2);
    Page<User> userPage = userMapper.selectPageVo(page, 18);
    System.out.println(userPage);
}