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java.lang.IllegalArgumentException: id to load is required for loading

Hibernate中出現這個異常一般是在使用load方法時,給定的主鍵值不正確造成的

我用id來載入一個類,但是id我根本就沒獲取到,hibernate更沒得到,用null來load一條記錄,就出現了這個異常

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