[bug] Field 'id' doesn't have a default value

在使用 spring + Hibernate + JPA 连接 Mysql时，报错如下：

bug：Field 'id' doesn't have a default value

原因是因为自己粗心，主键id并没有自增，没有勾选：AUTO_INCREMENT  

代码：

public static void main(String[] args) {
ApplicationContext factory=new ClassPathXmlApplicationContext("classpath:beans.xml");
RequestLogService service = (RequestLogService)factory.getBean("requeLogService");
RequestLog entity = new RequestLog();
entity.setQueryId(21);
entity.setType("212");
entity.setcTime(new Timestamp(System.currentTimeMillis()));
service.save(entity);
}