hibernate开发流程

 

 

开发流程，注意：每个hibernate版本在集成的时候是不太一样的。本次使用的是hibernate-distribution-3.6.10.Final-dist

一、开发流程

1）在数据库中创建表，代码如下：

CREATE TABLE USER(
id INT PRIMARY KEY AUTO_INCREMENT,
uName VARCHAR(50) NOT NULL,
uGender CHAR(2),
uBirthday DATE);

 

2）在工程中创建实体类

public class User {
    private int id;
    private String uName;
    private String uGender;
    private Date uBirthday;
    
    public User() {
        // TODO Auto-generated constructor stub
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getuName() {
        return uName;
    }

    public void setuName(String uName) {
        this.uName = uName;
    }

    public String getuGender() {
        return uGender;
    }

    public void setuGender(String uGender) {
        this.uGender = uGender;
    }

    public Date getuBirthday() {
        return uBirthday;
    }

    public void setuBirthday(Date uBirthday) {
        this.uBirthday = uBirthday;
    }

 

3）创建对象和表的映射文件，*.hbm.xml。User.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">


<hibernate-mapping 
    package="com.huitong.entity">
    
    <class name="User" table="user">
        
        <id name="id" column="id">
            <generator class="native"/>
        </id>
        
        <property name="uName" column="uName"></property>
        <property name="uGender" column="uGender"></property>
        <property name="uBirthday" column="uBirthday"></property>

    </class>
</hibernate-mapping>

 

4）hibernate的配置文件，放在src/目录下。hibernate.cfg.xml.

包含两部分

• 数据库连接配置
• 加载映射文件

<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <!-- 配置数据库连接 -->
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql:///day17?useSSL=true</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">root</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
        
        <property name="hibernate.show_sql">true</property>
        
        <!-- 加载映射文件 -->
        <mapping resource="com/huitong/entity/User.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

小技巧：在myeclipse中要将多个jar文件配置到classpath中：

<1>首先点中第一个jar包

<2>shift+点击最后一个jar文件，选中所有jar文件

 

 5）简单测试

    public void fun1(){
        User user = new User();
        user.setuName("good");
        user.setuBirthday(new Date());
        
        Configuration configuration = new Configuration();
        configuration.configure();
        
        SessionFactory sf = configuration.buildSessionFactory();
        Session session = sf.openSession();
        
        Transaction bt = session.beginTransaction();
        session.save(user);
        bt.commit();
        
        session.close();
        sf.close();
        
    }

 

5）当有多个配置文件时，使用include进行包含

<include file="com/baidu/action/AdminConfig.xml"></include>