mybatis-plus分页配置

在操作书库的时候，总是不可避免的遇到分页。在此记录一下mybatis-plus分页配置

分页配置类

@Data
@AllArgsConstructor
@NoArgsConstructor
public class PageResult implements Serializable {
    
    

    private Long counts = 0l;//总记录数
    private Integer pagesize = 10;//页大小
    private Long pages = 0l;//总页数
    private Integer page = 1;//当前页码
    private List<?> items = Collections.emptyList(); //列表

    public PageResult(Integer page, Integer pagesize, Long counts, List list) {
    
    
        this.page = page;
        this.pagesize = pagesize;
        this.items = list;
        this.counts = counts;
        this.pages = counts % pagesize == 0 ? counts / pagesize : counts / pagesize + 1;
    }
}

YAL配置

mybatis-plus:
  global-config:
    db-config:
      table-prefix: tb_   # 表名前缀
      id-type: auto   # id策略为自增长

引导类配置

   @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
    
    
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        return interceptor;
    }

测试调用 Mapper

public interface BlackListMapper extends BaseMapper<BlackList> {
    
    

    @Select("select * from tb_user_info where id in( \n" +
            "select black_user_id from tb_black_list where user_id = #{userId}  \n" +
            ") ")
    IPage<UserInfo> findBlackList(Page pages, Long userId);
}

测试调用 Server

    @Override
    public IPage<UserInfo> blacklist(Integer page, Integer pagesize, Long userId) {
    
    
        //1、构建分页参数对象Page
        Page pages = new Page(page, pagesize);
        //2、调用方法分页（自定义编写 分页参数Page，sql条件参数）
        return blackListMapper.findBlackList(pages, userId);
    }

测试调用 Controller

public PageResult blacklist(Integer page, Integer pagesize) {
    
    
        //获取用户id
        Long userId = TokenThreadLocal.getUserId();
        //查询用户黑名单列表
        IPage<UserInfo> iPage = userInfoApi.blacklist(page, pagesize, userId);
        //3、对象转化，将查询的Ipage对象的内容封装到PageResult中
        PageResult pageResult = new PageResult(page, pagesize, iPage.getTotal(), iPage.getRecords());
        return pageResult;
    }