用SchemaExport生成數據庫

用SchemaExport生成數據庫
首先導包：到Windows/Preferences/java/Build Path/User Libreries裏面添加 mysql.jar包，hibernate-4.jar包（required），struts2.jar包（解壓blank.war文件即可得到），junit.jar包。再到項目右擊properties到裏面添加build path

1.建立entity

1.學生類

package entity;

import java.util.Date;

public class Student {

    private String sid;
    private String sname;
    private String gender;
    private Date birthday;
    private String address;

    public Student(){

    }


    public Student(String sid, String sname, String gender, Date birthday,
            String address) {
        //super();
        this.sid = sid;
        this.sname = sname;
        this.gender = gender;
        this.birthday = birthday;
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student [address=" + address + ", birthday=" + birthday
                + ", gender=" + gender + ", sid=" + sid + ", sname=" + sname
                + "]";
    }

    public String getSid() {
        return sid;
    }
    public void setSid(String sid) {
        this.sid = sid;
    }
    public String getSname() {
        return sname;
    }
    public void setSname(String sname) {
        this.sname = sname;
    }
    public String getGender() {
        return gender;
    }
    public void setGender(String gender) {
        this.gender = gender;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }


}

2.用戶類

package entity;

public class User {

    private int uid;
    private String username;
    private String password;

    public User(){

    }

    public int getUid() {
        return uid;
    }

    public void setUid(int uid) {
        this.uid = uid;
    }

    public User(int id, String username, String password) {
        //super();
        this.uid = id;
        this.username = username;
        this.password = password;
    }


    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;
    }


}

2.創建對象關係映射文件
1.Student.hbm.xml

<?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>
    <class name="entity.Student"
           table="STUDENTS">
        <id name="sid"  type="java.lang.String" length="19">
            <generator class="assigned"/>
        </id>
        <property name="sname" type="java.lang.String"/>
        <property name="gender" type="java.lang.String"/>
        <property name="birthday" type="date"/>
        <property name="address" type="date"/>


    </class>
</hibernate-mapping>

2.User.hbm.xml

<?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>
    <class name="entity.User"
           table="USERS">
        <id name="uid"  type="int">
            <generator class="native"/>
        </id>
        <property name="username" type="java.lang.String"/>
        <property name="password" type="java.lang.String"/>


    </class>
</hibernate-mapping>

3.建立hibernate.cfg.xm

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password"></property>
    <property name="hibernate.connection.url">
        jdbc:mysql://localhost:3306/testmooc
    </property>
    <property name="hibernate.dialect">
        org.hibernate.dialect.MySQLDialect
    </property>
    <property name="connection.driver_class">
        com.mysql.jdbc.Driver
    </property>
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.hbm2ddl.auto">update</property>
    <property name="format_sql">true</property>
    <property name="hibernate.current_session_context_class">thread</property>

    <mapping resource="entity/Student.hbm.xml"/>
    <mapping resource="entity/User.hbm.xml"/>

</session-factory>
</hibernate-configuration> 

4.建立TestStuend類

package entity;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.junit.Test;


public class TestStudent {

    @Test
    public void testSchemaExport(){
        //創建配置對象
        Configuration config=new Configuration().configure();
        //創建服務註冊對象
        ServiceRegistry serviceRegistry=new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
        //創建sessionFactory
        SessionFactory sessionFactory=config.buildSessionFactory(serviceRegistry);
        //創建session對象
        Session session = sessionFactory.getCurrentSession();
        //創建SchemaExport對象
        SchemaExport export= new SchemaExport(config);
        //第一個true輸出表結構，第二個true輸出sql語句
        export.create(true, true);
    }
}

5.生成數據庫
打開數據庫建立相應的數據庫……單元測試即可.