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从你打印的看 product 有4条数据 user 有两条数据，但是你加了关联条件 where szy_product_tb.publishUserId = szy_user_tb.userId ，
能关联上的应该只有1条
噗...问题找到了...有map id的字段写错了，应该是productId，我写成id了，没对应上。。。。。。。。该呀。。