做个简单的Java学生考勤系统01--实体类的创建与建表
作者:互联网
从这篇开始,写个从零开始的简单学生考勤,层级结构本来想着是Service层就够了,再加个Entity实体类就行了。后面再拓宽,前端发送请求,增加Controller层,Dao层保存数据库,这里Dao层选择最原始的JDBC,快捷。主要是博主懒。最后加个Util工具类啥的,该有的都有了。
一、实体类
1、学生实体类(主键id,学号,姓名,性别,班级,登录名,登录密码,是否删除)
package model;
public class Txuesheng {
private int id;
private String xuehao;
private String xingming;
private String xingbie;
private String nianling;
private String banji;
private String loginname;
private String loginpw;
private String del;
// getter,setter方法
}
2、签到表(主键id,学生id,课表id,签到时间,引用课表对象,学生对象)
package model;
public class Tqiandao {
private int id;
private int xuesheng_id;
private int kebiao_id;
private String shijian;
private Tkebiao kebiao;
private Txuesheng xuesheng;
// getter,setter方法
}
3、课表实体类(主键id,课程id,上课时间,教室,老师id,引用课程对象,老师对象,是否签到)
package model;
public class Tkebiao {
private int id;
private int kecheng_id;
private String shijian;
private String jiaoshi;
private String laoshi_id;
private Tkecheng kecheng;
private Tlaoshi laoshi;
private String shifouqiandao;
// getter,setter方法
}
4、课程实体类(主键id,编号,名称,科室,是否删除)
package model;
public class Tkecheng {
private int id;
private String bianhao;
private String mingcheng;
private String keshi;
private String del;
// getter,setter方法
}
5、老师实体类(主键id,编号,姓名,性别,年龄,职称,登录名,登录密码,是否删除)
package model;
public class Tlaoshi {
private int id;
private String bianhao;
private String xingming;
private String xingbie;
private String nianling;
private String zhicheng;
private String loginname;
private String loginpw;
private String del;
// getter,setter方法
}
最后,创建个管理员实体类,管理学生,教室,课表等信息
6、管理员实体类(主键id,登录名,密码)
package model;
public class TAdmin {
private int userId;
private String userName;
private String userPw;
// getter,setter方法
}
实体类创建好了,接下来创建表
二、创建表
CREATE TABLE `t_admin` (
`userId` int(4) NOT NULL,
`userName` varchar(50) DEFAULT NULL,
`userPw` varchar(50) DEFAULT NULL,
PRIMARY KEY (`userId`)
);
CREATE TABLE `t_kaoqin` (
`id` int(4) NOT NULL,
`xuesheng_id` int(4) DEFAULT NULL,
`kebiao_id` int(4) DEFAULT NULL,
`shijian` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
);
CREATE TABLE `t_kebiao` (
`id` int(4) NOT NULL,
`kecheng_id` int(4) DEFAULT NULL,
`shijian` varchar(50) DEFAULT NULL,
`jiaoshi` varchar(50) DEFAULT NULL,
`laoshi_id` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
);
CREATE TABLE `t_kecheng` (
`id` int(4) NOT NULL AUTO_INCREMENT,
`bianhao` varchar(50) DEFAULT NULL,
`mingcheng` varchar(50) DEFAULT NULL,
`keshi` varchar(50) DEFAULT NULL,
`del` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
);
CREATE TABLE `t_laoshi` (
`id` int(4) NOT NULL,
`bianhao` varchar(50) DEFAULT NULL,
`xingming` varchar(50) DEFAULT NULL,
`xingbie` varchar(50) DEFAULT NULL,
`nianling` varchar(50) DEFAULT NULL,
`zhicheng` varchar(20) DEFAULT NULL,
`loginname` varchar(50) DEFAULT NULL,
`loginpw` varchar(50) DEFAULT NULL,
`del` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
);
CREATE TABLE `t_qiandao` (
`id` int(10) NOT NULL,
`xuesheng_id` int(10) DEFAULT NULL,
`kebiao_id` int(10) DEFAULT NULL,
`shijian` varchar(50) DEFAULT NULL,
`qingjia` varchar(10) DEFAULT NULL,
PRIMARY KEY (`id`)
);
CREATE TABLE `t_xuesheng` (
`id` int(4) NOT NULL,
`xuehao` varchar(50) DEFAULT NULL,
`xingming` varchar(50) DEFAULT NULL,
`xingbie` varchar(50) DEFAULT NULL,
`nianling` varchar(50) DEFAULT NULL,
`banji` varchar(20) DEFAULT NULL,
`loginname` varchar(20) DEFAULT NULL,
`loginpw` varchar(20) DEFAULT NULL,
`del` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
);
实体类和表已经创建好了,下一篇会讲解功能是怎么实现的
标签:01,Java,String,DEFAULT,private,考勤,varchar,NULL,id 来源: https://blog.csdn.net/exodus3/article/details/121025959