org.springframework.dao.InvalidDataAccessApiUsageException: The given id must not be null!; nested exception is java.lang.IllegalArgumentException
：第一行中提到了兩個異常：InvalidDataAccessApiUsageException和Illeg ...
原文：org.springframework.dao.InvalidDataAccessApiUsageException: The given object has a null identifier:
JSP 頁面保存操作報錯： org.springframework.dao.InvalidDataAccessApiUsageException: The given object has a null identifier: exception root cause 缺少主鍵引起的 解決辦法： 在JSP頁面加入主鍵 lt s:hidden name .id gt lt s:hidden gt ...
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