hibernate------one-to-one（通过外键方式实现）

最新推荐文章于 2020-05-04 17:23:32 发布

原创最新推荐文章于 2020-05-04 17:23:32 发布 · 961 阅读

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本文介绍了一对一关联关系的数据库表结构设计方法，并通过具体的学生与电脑的关系进行了详细说明，包括对应的Java实体类定义及Hibernate配置文件。

以学生和电脑为例(Student-Computer)
建表sql语句：

DROP TABLE IF EXISTS `student`; CREATE TABLE `student` ( `id` int(11) NOT NULL auto_increment, `name` varchar(255) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; DROP TABLE IF EXISTS `computer`; CREATE TABLE `computer` ( `id` int(11) NOT NULL auto_increment, `name` varchar(255) NOT NULL, `student_id` int(11) , foreign key (`student_id`) references student(`id`), PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Student.java:

public class Student implements java.io.Serializable { private Integer id; private String name; private Computer computer; public Student() { } public Student(String name) { this.name = name; } public Integer getId() { return this.id; } public void setId(Integer id) { this.id = id; } public String getName() { return this.name; } public void setName(String name) { this.name = name; } public Computer getComputer() { return computer; } public void setComputer(Computer computer) { this.computer = computer; } }

Computer.java:

public class Computer implements java.io.Serializable { private Integer id; private Student student; private String name; public Computer() { } public Computer(String name) { this.name = name; } public Computer(Student student, String name) { this.student = student; this.name = name; } public Integer getId() { return this.id; } public void setId(Integer id) { this.id = id; } public Student getStudent() { return this.student; } public void setStudent(Student student) { this.student = student; } public String getName() { return this.name; } public void setName(String name) { this.name = name; } }

Student.hbm.xml:

Computer.hbm.xml: