结果：返回ERROR!抛异常
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2019-01-26 00:40:57.713 ERROR 10136 --- [nio-8080-exec-3] c.e.demo.controller.UserController : 刷新(refresh)一个删除态的对象!
org.springframework.dao.InvalidDataAccessApiUsageException: Entity not managed; nested exception is java.lang.IllegalArgumentException: Entity not managed
at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:373) ~[spring-orm-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:255) ~[spring-orm-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:527) ~[spring-orm-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:61) ~[spring-tx-5.1.4.RELEASE.jar:5.1.4.RELEASE]
4.游离态
代码
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/**
* 刷新游离态对象
*@param id
* @return
*/
@RequestMapping("/refreshDetached/{id}")
public String refreshDetached(@PathVariable("id")Long id){
try {
User user = userDao.findById(id);
userDao.refreshDetached(user);
}catch (Exception e){
logger.error("刷新(refresh)一个游离态的对象!",e);
return REPONSE_ERR;
}
return REPONSE_SUCCESS;
}
----------------------------------------------------------------------
/**
* 刷新游离态的对象
*
* @param user
*/
@Override
public void refreshDetached(User user) {
clear();
refresh(user);
}
步骤
:8080/user/list，获取`id`
:8080/user/refreshDetached/{id},`