上網查了一下，說的是自增惹得麻煩！！在@GeneratedValue后面加上框框中的內容就OK拉！
springboot測試的時候插入數據: error performing isolated work; SQL [n/a]; nested exception is org.hibernate...
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SpringBoot保存數據報錯：could not execute statement; SQL [n/a]; constraint [PRIMARY];nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement
could not execute statement； SQL [n/a]； nested exception is org.hibernate.exception.DataException:
could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
Exception occurred during processing request: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
HTTP Status 500 - JDBC exception on Hibernate data access: SQLException for SQL [n/a]; SQL state [HY000]; error code [1364]; could not execute statement; nested exception is org.hibernate.exception.Ge
org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.
【hibernate】報錯：org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.DataException: could not execute statement
報錯org.springframework.dao.InvalidDataAccessResourceUsageException: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet"
nested exception is org.hibernate.exception.SQLGrammarException
報錯：org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute statement