更新 'README.md'

README.md

 # spring-boot-jpa
 
-spring boot 2
-JPA相关的代码
-
-结果
-1. insert 无主键
-{"ex":{"exClass":"org.springframework.orm.jpa.JpaSystemException","message":"ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User; nested exception is org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User"},"exCause":{"causeBy":"org.hibernate.id.IdentifierGenerationException","message":"ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User"}}
-
-2. insert 非空字段未设定
-{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
-
-3. insert 字段长度越界
-{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.DataException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.DataException","message":"could not execute statement"}}
-
-4.insert 主键冲突
-{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [PRIMARY]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
-
-5.insert 唯一索引冲突
-{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [PRIMARY]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
-
-6. update 无主键
-{"ex":{"exClass":"org.springframework.orm.jpa.JpaSystemException","message":"ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User; nested exception is org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User"},"exCause":{"causeBy":"org.hibernate.id.IdentifierGenerationException","message":"ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User"}}
-
-7 update 非空字段未设定
-{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
-
-8. update 字段长度越界
-"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.DataException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.DataException","message":"could not execute statement"}}
-
-9. update 乐观锁冲突 即 Version冲突
-{"ex":{"exClass":"org.springframework.orm.ObjectOptimisticLockingFailureException","message":"Object of class [ltass.staudy.spring.data.jpa.entity.User] with identifier [1]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) : [ltass.staudy.spring.data.jpa.entity.User#1]"},"exCause":{"causeBy":"org.hibernate.StaleObjectStateException","message":"Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) : [ltass.staudy.spring.data.jpa.entity.User#1]"}}
-
-10. update 唯一索引冲突
-{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [PRIMARY]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
+spring boot 2
+JPA相关的代码
+
+结果
+#1. insert 无主键
+{"ex":{"exClass":"org.springframework.orm.jpa.JpaSystemException","message":"ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User; nested exception is org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User"},"exCause":{"causeBy":"org.hibernate.id.IdentifierGenerationException","message":"ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User"}}
+
+#2. insert 非空字段未设定
+{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
+
+#3. insert 字段长度越界
+{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.DataException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.DataException","message":"could not execute statement"}}
+
+#4.insert 主键冲突
+{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [PRIMARY]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
+
+#5.insert 唯一索引冲突
+{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [PRIMARY]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
+
+#6. update 无主键
+{"ex":{"exClass":"org.springframework.orm.jpa.JpaSystemException","message":"ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User; nested exception is org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User"},"exCause":{"causeBy":"org.hibernate.id.IdentifierGenerationException","message":"ids for this class must be manually assigned before calling save(): ltass.staudy.spring.data.jpa.entity.User"}}
+
+#7 update 非空字段未设定
+{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}
+
+#8. update 字段长度越界
+"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.DataException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.DataException","message":"could not execute statement"}}
+
+#9. update 乐观锁冲突 即 Version冲突
+{"ex":{"exClass":"org.springframework.orm.ObjectOptimisticLockingFailureException","message":"Object of class [ltass.staudy.spring.data.jpa.entity.User] with identifier [1]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) : [ltass.staudy.spring.data.jpa.entity.User#1]"},"exCause":{"causeBy":"org.hibernate.StaleObjectStateException","message":"Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) : [ltass.staudy.spring.data.jpa.entity.User#1]"}}
+
+#10. update 唯一索引冲突
+{"ex":{"exClass":"org.springframework.dao.DataIntegrityViolationException","message":"could not execute statement; SQL [n/a]; constraint [PRIMARY]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"},"exCause":{"causeBy":"org.hibernate.exception.ConstraintViolationException","message":"could not execute statement"}}