attempted to return null from a method with a primitive return type (int)
報錯背景 我在使用springboot做登錄查詢的時候報錯了,我輸入的是數據庫中不存在的用戶名與密碼,返回值應該是null; 報錯信息 解決方案 把返回值類型改成Integer 我來運行看看,是否真的有效 還是報錯! 網上說把dao service返回值都改成Integer 然後再control層裏面 也是Integer接受值，這樣寫 終於不報錯了！太坎坷了！
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- 1. [mybatis]............attempted to return null from a method with a primitive return type (int).
- 2. RoleMapper.deleteRole attempted to return null from a method with a primitive return type (int).
- 3. （MyBatis）insertStudent attempted to return null from a method with a primitive return type (int).
- 4. Mybatis：Mapper method attempted to return null from a method
- 5. 【java】Mybatis返回int類型爲空時報錯 attempted to return null from a method with a primitive return type (int）
- 6. mybatis使用xml實現發生的異常之一return null from a method with a primitive return type (int)
- 7. MyBatis Error：BindingException Mapper method attempted to return null
- 8. Null return value from advice does not match primitive return type for
- 9. Cannot return from outside a function or method
- 10. Cannot return from outside a function or method.