hibernate学习笔记3_schemaexport:303-优快云博客

本文链接：https://blog.youkuaiyun.com/fendou4533/article/details/8556213

本文介绍了一个使用Hibernate框架实现的学生信息类及其ID卡类的映射配置。通过定义Student和StuIdCard类及其属性，展示了如何将这些Java对象与数据库表进行映射。

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public class Student {
   private int id;
   private String name;

   private int age;
   private String sex;
   private boolean good;
   public boolean isGood() {
       return good;
   }
   public void setGood(boolean good) {
       this.good = good;
   }
   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
   public int getAge() {
       return age;
   }
   public void setAge(int age) {
       this.age = age;
   }
   public String getSex() {
       return sex;
   }
   public void setSex(String sex) {
       this.sex = sex;
   }

}

<hibernate-mapping>
   <class name="com.bjsxt.hibernate.Student" dynamic-update="true">//dynamic-update (可选, 默认为 false): 指定用于UPDATE 的SQL将会在运行时动态生成，并且只更新那些改变过的字段。
       <id name="id">
           <generator class="native"></generator>
       </id>

       <property name="name"></property>
       <property name="age" />
       <property name="sex" />
       <property name="good" type="yes_no"></property>
    </class>

</hibernate-mapping>

public class StuIdCard {
   private int id;
   private String num;
   private Student student;
   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public String getNum() {
       return num;
   }
   public void setNum(String num) {
       this.num = num;
   }
   public Student getStudent() {
       return student;
   }
   public void setStudent(Student student) {
       this.student = student;
   }

}

<hibernate-mapping>
   <class name="com.bjsxt.hibernate.StuIdCard">
       <id name="id">
           <generator class="native"></generator>
       </id>

       <property name="num"/>
       <many-to-one name="student" column="studentId" unique="true"></many-to-one> //unique (可选 - 默认是 false):表明组件映射的所有字段上都有唯一性约束
    </class>

</hibernate-mapping>

    Student s = new Student();

       s.setAge(8);
       s.setGood(false);
       s.setName("zhansan");
       s.setSex("man");


       StuIdCard sc = new StuIdCard();
       sc.setNum("111");
       sc.setStudent(s);


       Session session = sessionFactory.getCurrentSession();
       session.beginTransaction();
       session.save(s);
       session.save(sc);
       session.getTransaction().commit();

14:45:56,937 INFO org.hibernate.tool.hbm2ddl.SchemaExport:154 - Running hbm2ddl schema export
14:45:56,953 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:170 - import file not found: /import.sql
14:45:56,953 INFO org.hibernate.tool.hbm2ddl.SchemaExport:179 - exporting generated schema to database
14:45:56,953 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - alter table StuIdCard drop foreign key FKD3A449FF76CCDAE1
14:45:57,125 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - drop table if exists StuIdCard
14:45:57,156 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - drop table if exists Student
14:45:57,156 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - create table StuIdCard (id integer not null auto_increment, num varchar(255), studentId integer unique, primary key (id))
14:45:57,218 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - create table Student (id integer not null auto_increment, name varchar(255), age integer, sex varchar(255), good char(1), primary key (id))
14:45:57,265 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - alter table StuIdCard add index FKD3A449FF76CCDAE1 (studentId), add constraint FKD3A449FF76CCDAE1 foreign key (studentId) references Student (id)
14:45:57,343 INFO org.hibernate.tool.hbm2ddl.SchemaExport:196 - schema export complete
14:45:57,390 INFO org.hibernate.tool.hbm2ddl.SchemaExport:154 - Running hbm2ddl schema export
14:45:57,390 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:170 - import file not found: /import.sql
14:45:57,390 INFO org.hibernate.tool.hbm2ddl.SchemaExport:179 - exporting generated schema to database
14:45:57,406 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - alter table StuIdCard drop foreign key FKD3A449FF76CCDAE1
14:45:57,484 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - drop table if exists StuIdCard
14:45:57,500 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - drop table if exists Student
14:45:57,500 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - create table StuIdCard (id integer not null auto_increment, num varchar(255), studentId integer unique, primary key (id))
14:45:57,546 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - create table Student (id integer not null auto_increment, name varchar(255), age integer, sex varchar(255), good char(1), primary key (id))
14:45:57,609 DEBUG org.hibernate.tool.hbm2ddl.SchemaExport:303 - alter table StuIdCard add index FKD3A449FF76CCDAE1 (studentId), add constraint FKD3A449FF76CCDAE1 foreign key (studentId) references Student (id)
14:45:57,703 INFO org.hibernate.tool.hbm2ddl.SchemaExport:196 - schema export complete
Hibernate: insert into Student (name, age, sex, good) values (?, ?, ?, ?)
Hibernate: insert into StuIdCard (num, studentId) values (?, ?)