一般是字段映射或者JPA的配置問題，認真檢查實體或者父類有哪些字段和數據庫沒有映射到；參考文檔：https://www.cnblogs.com/qingmuchuanqi48/p/11986685.html
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Caused by: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: Cannot open connection
報錯：org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute statement
hibernate.exception.GenericJDBCException: could not extract ResultSet 解決辦法
could not extract ResultSet
關於hibernate 實體沒有主鍵調用save方法報錯could not extract ResultSet的解決辦法
javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: ResultSet is from UPDATE. No Data.
解決Exception：Could not open Hibernate Session for transaction; nested exception is java.lang.NoClassDefFoundError: org/hibernate/engine/transaction/spi/TransactionContext
hibernate異常：org.hibernate.exception.GenericJDBCException
解決Could not open Hibernate Session for transaction; nested exception is java.lang.NoClassDefFoundError: org/hibernate/engine/transaction/spi/TransactionContext