把Xxx.hbm.xml主键生成策略改成identity
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【排坑记录】ids for this class must be manually assigned before calling save():
错误信息：ids for this class must be manually assigned before calling save(): sample.db.Completedsample
org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save()
错误/异常：org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save() 的解决方法
[ISSUE]SyntaxWarning: name 'xxx' is assigned to before global declaration
error: must use ‘class’ tag to refer to type ‘XXX’ in this scope
error: must use ‘class’ tag to refer to type ‘XXX’ in this scope
Cannot access 'xxx' before initialization
Private field 'XXX' is never assigned的解决办法