分页 IPage Page

一、分页原理

 

二、使用IPage分页

service:

public interface UserInfoService extends IService<UserInfo> {
    IPage getUserInfoList(GetUserInfoListVo getUserInfoListVo);
}

serviceImpl:

public IPage getUserInfoList(GetUserInfoListVo getUserInfoListVo) {
    Page page = Utils.getPage(getUserInfoListVo);  //初始化页（当前页current,每页容量size）new Page(pageIndex,pageSize)
return userInfoMapper.getUserInfoList(page, getUserInfoListVo); }

mapper:

@Mapper
public interface UserInfoMapper extends BaseMapper<UserInfo> {
    IPage<UserInfo> getUserInfoList(Page page, @Param("param") GetUserInfoListVo getUserInfoListVo);
}

后续直接写对应的sql

三、Page 实现 IPage

public class Page<T> implements IPage<T> {
    private List<T> records;
    private long total;
    private long size;
    private long current;
    private List<OrderItem> orders;
    private boolean optimizeCountSql;
    private boolean isSearchCount;
    private boolean hitCount;
    ......
}