All elemen are null
今天在寫SpringBoot+Mybatis時出現All elemen are null 有值但是顯示不出來,如圖 網上說 ArrayList允許添加null值，就容易造成了list內的對象轉換出現java.lang.NullPointerException異常。 但是實踐更改發現沒什麼亂用 最後在*.xml裏面發現異常 發現*.xml裏面查詢的字段和實體類的字段不一致 解決方法： 在查詢時取別名
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相關文章
- 1. hibernate all elements are null
- 2. all element range(0,99) are null 問題
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- 5. Not All Ops Are Created Equal!
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- 8. All specified directories are failed to load
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