MybatisPlus公用Page导致同对象返回

代码

		Page<CouponInfo> page = new Page<>(1, -1);
        CouponInfo couponInfo1 = new CouponInfo();
        couponInfo1.setId(1630503086041903106L);
        Page<CouponInfo> couponInfoPage = couponInfoMapper.selectPageList(couponInfo1, page);
        Page<CouponInfo> couponInfoPage1 = couponInfoMapper.selectPageList2(couponInfo1, page);

couponInfoPage和couponInfoPage1

借鉴大佬文章https://zhuanlan.zhihu.com/p/550164886

com.baomidou.mybatisplus.core.override.MybatisMapperMethod#execute

85行executeForIPage真正执行,其中args则是入参Mapper的Page,由于Page是同一个对象,则返回塞入同一个对象

// TODO 这里下面改了
if (IPage.class.isAssignableFrom(method.getReturnType())) {
    result = executeForIPage(sqlSession, args);
}

private <E> Object executeForIPage(SqlSession sqlSession, Object[] args) {
    IPage<E> result = null;
    for (Object arg : args) {
        if (arg instanceof IPage) {
            result = (IPage<E>) arg;
            break;
        }
    }
    Assert.notNull(result, "can't found IPage for args!");
    Object param = method.convertArgsToSqlCommandParam(args);
    List<E> list = sqlSession.selectList(command.getName(), param);
    result.setRecords(list);
    return result;
}

修复===>

   Page<CouponInfo> page = new Page<>(1, 10);
        Page<CouponInfo> page2= new Page<>(1, 10);
//        page=null;
        CouponInfo couponInfo1 = new CouponInfo();
        couponInfo1.setId(1630503086041903106L);
        Page<CouponInfo> couponInfoPage = couponInfoMapper.selectPageList(couponInfo1, page);
        Page<CouponInfo> couponInfoPage1 = couponInfoMapper.selectPageList2(couponInfo1, page2);