一、实验介绍
1.1 实验内容
本节课程主要根据第三节的数据库设计完成持久化实体映射设计，并完成持久化实体类的创建。
1.2 实验知识点
- 持久化实体
- Domain Object 层
1.3 实验环境
- JDK1.8
- Eclipse JavaEE
二、实验步骤
打开 Eclipse，找到我们之前建立的项目 hrms，开始我们的实验。
在项目 hrms 的 Java Resources 目录的 src/main/java 下新建包 com.shiyanlou.domain，作为 Domain Object 层的包。
接下来，根据第三节数据库的设计创建实体类。
2.1 Admin 类（管理员）
在 src/main/java 目录下的 com.shiyanlou.domain 包中新建实体类 Admin，作为管理员表 的映射。
package com.shiyanlou.domain;
import java.io.Serializable;
public class Admin implements Serializable {
private static final long serialVersionUID = 1L;
private Integer id; // 管理员编号
private String username; // 用户名
private String password; // 密码
private String role_name; // 管理员角色
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getRole_name() {
return role_name;
}
public void setRole_name(String role_name) {
this.role_name = role_name;
}
@Override
public String toString() {
return "Admin:[id=" + id + ",username=" + username + ",password="
+ password + ",role_name=" + role_name + "]";
}
}
2.2 Post 类（公告）
在 src/main/java 目录下的 com.shiyanlou.domain 包中新建实体类 Post，作为公告表 的映射。
package com.shiyanlou.domain;
import java.io.Serializable;
import java.util.Date;
public class Post implements Serializable {
private static final long serialVersionUID = 1L;
private Integer id; // 公告编号
private String title; // 标题
private String content; // 内容
private Admin admin; // 发布人
private Date date; // 发布日期
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public Admin getAdmin() {
return admin;
}
public void setAdmin(Admin admin) {
this.admin = admin;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
@Override
public String toString() {
return "Post:[id=" + id + ",title=" + title + ",content=" + content
+ ",admin=" + admin + ",date=" + date + "]";
}
}
2.3 Department 类（部门）
在 src/main/java 目录下的 com.shiyanlou.domain 包中新建实体类 Department，作为部门表 的映射。
package com.shiyanlou.domain;
import java.io.Serializable;
public class Department implements Serializable {
private static final long serialVersionUID = 1L;
private Integer id; // 部门编号
private String name; // 名称
private String description; // 描述
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@Override
public String toString() {
return "Department:[id=" + id + ",name=" + name + ",description="
+ description + "]";
}
}
2.4 Position 类（职位）
在 src/main/java 目录下的 com.shiyanlou.domain 包中新建实体类 Position，作为职位表 的映射。
package com.shiyanlou.domain;
import java.io.Serializable;
public class Position implements Serializable {
private static final long serialVersionUID = 1L;
private Integer id; // 职位编号
private String name; // 名称
private String description; // 描述
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@Override
public String toString() {
return "Position:[id=" + id + ",name=" + name + ",description="
+ description + "]";
}
}
2.5 Employee 类（员工）
在 src/main/java 目录下的 com.shiyanlou.domain 包中新建实体类 Employee，作为员工表 的映射。
package com.shiyanlou.domain;
import java.io.Serializable;
import java.util.Date;
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
private String id; // 员工编号
private String name; // 姓名
private String sex; // 性别
private String phone; // 电话
private String email; // 邮箱
private String address; // 地址
private String education; // 学历
private Date birthday; // 生日
private Department department; // 部门
private Position position; // 职位
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getEducation() {
return education;
}
public void setEducation(String education) {
this.education = education;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public Department getDepartment() {
return department;
}
public void setDepartment(Department department) {
this.department = department;
}
public Position getPosition() {
return position;
}
public void setPosition(Position position) {
this.position = position;
}
@Override
public String toString() {
return "Employee:[id=" + id + ",name=" + name + ",sex=" + sex
+ ",phone=" + phone + ",email=" + email + ",address=" + address
+ ",education=" + education + ",birthday=" + birthday
+ ",department=" + department + ",position=" + position + "]";
}
}
三、实验总结
到这里我们就完成了 Domain Object 层实体类的设计实现，下一节我们将进入 DAO 层的实现。