hibernate主鍵建置原則

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標籤:conf   actor   cti   方式   session   產生   uid   dtd   rac   

主鍵產生採用uuid的方式產生,在實體類中該主鍵的類型必須為String類型。

 

hibernate xml設定檔的方式

實體類:Student.java:

package com.bxw.entity;public class Student {    private String id;    private String name;    private String sex;        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;    }        }

設定檔Student.hbm.xml預設路徑和Student類在同一個包。

<?xml version="1.0" encoding=‘UTF-8‘?>    <!DOCTYPE hibernate-mapping PUBLIC        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">  <hibernate-mapping package="com.bxw.entity">     <class name="Student">        <id name="id">          <generator class="uuid"></generator>      </id>       <property name="name"></property>        <property name="sex"></property>     </class></hibernate-mapping>  

測試

package com.bxw.test;import org.hibernate.Session;import org.hibernate.cfg.Configuration;import org.junit.AfterClass;import org.junit.BeforeClass;import org.junit.Test;import com.bxw.entity.Student;public class StudentTest{    private static Session session = null;    @BeforeClass    public static void getSession(){        try {            Configuration conf = new Configuration();            conf.configure();            session = conf.buildSessionFactory().openSession();        } catch (Exception e) {            e.printStackTrace();        }    }        @Test    public void hibernateIdTest() {        Student ss = new Student();        ss.setName("Han meimei");        ss.setSex("女");                session.beginTransaction();        session.save(ss);        session.getTransaction().commit();    }        @AfterClass    public static void over(){        session.close();    }}

 

hibernate主鍵建置原則

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