@Column(name="loginname",columnDefinition=("varchar(50) default null comment '登錄名'"))
http://www.iteye.com/problems/56521
JPA對象註解類型
http://www.majunwei.com/view/201707241152140494.html
hibernate/jpa 註解 註釋到數據庫(MySql)
http://blog.csdn.net/xiaobangsky/article/details/17675015?locationNum=2
hibernate 註解 註釋到 數據庫 以及 java字段與數據庫字段對應說明
http://blog.csdn.net/BianChengNinHao/article/details/17634857JPA @Column 註解詳解
http://blog.csdn.net/wuqilianga/article/details/51596467
http://blog.csdn.net/Rickesy/article/details/50788173