spring和hibernate详细步骤

水深无声 2022-05-15 08:35 155阅读 0赞

# 一.spring与hibernate整合的关键 #

###      SessionFactory的创建交由IOC容器来管理。 ###

###      原本SessionFactory的需要通过Configuration对象创建， ###

###      SessionFactory sf = new Configuration().configure().buildSessionFactory(); ###

###     现可以通过spring配置，依赖IOC容器，DI注入来实现。 ###

# 二.整合步骤 #

###   1.导入hibernate，spring，数据库连接所需要的jar包 ###

###   2.配置hibernate.cfg.xml文件，xxx.hbn.xml对象映射文件，spring配置文件 ###

###   3.创建测试类测试 ###

# 三.实践 #

## 3.1先建立javabean,创建了一个user，只有简单的id，name两个属性 ##

public class user {
        
    	private int id;
    	private String name;
    	
    	@Override
    	public String toString() {
    		return "user [id=" + id + ", name=" + name + "]";
    	}
    	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;
    	}
    	
    }

## 3.2配置文件的配置 ##

### hibernate.cfg.xml文件的配置如下： ###

<?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.url">jdbc:mysql://localhost:3306/mybase</property>
        	<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        	<property name="hibernate.connection.username">root</property>
        	<property name="hibernate.connection.password">root</property>
        	
        	<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        	
        	
        	<property name="hibernate.show_sql">true</property>
        	
        	<property name="hibernate.format_sql">true</property>
        	<property name="hibernate.hbm2ddl.auto">update</property>
     
     		
        	<mapping resource="hib/user.hbm.xml"/>
        </session-factory>
    </hibernate-configuration>

### 3.3user.hbn.xml配置如下： ###

<?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="hib">
    	<class name="user" table="user">
    		<id name="id" column="id">
    			<generator class="native">
    			</generator>
    		</id>
    		<property name="name" column="name"></property>
    	</class>
    
    </hibernate-mapping>

### 3.4spring配置如下： ###

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"     
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"           
        xmlns:context="http://www.springframework.org/schema/context"   		
        xmlns:aop="http://www.springframework.org/schema/aop"       			
        xmlns:tx="http://www.springframework.org/schema/tx"         
        xmlns:util="http://www.springframework.org/schema/util"         
        xmlns:p="http://www.springframework.org/schema/p"               
        xsi:schemaLocation="http://www.springframework.org/schema/beans                             
                            http://www.springframework.org/schema/beans/spring-beans-3.0.xsd        
                            http://www.springframework.org/schema/context                           
                            http://www.springframework.org/schema/context/spring-context-3.0.xsd    
                            http://www.springframework.org/schema/aop                               
                            http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
                            http://www.springframework.org/schema/tx                            
                            http://www.springframework.org/schema/tx/spring-tx-3.0.xsd                      
                            http://www.springframework.org/schema/util                          
                            http://www.springframework.org/schema/util/spring-util-3.0.xsd">  
                            
    	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    		<property name="configLocation" value="hibernate.cfg.xml"></property>
    	</bean>                     
    
    </beans>

# 四.测试类的创建. #

import org.hibernate.SessionFactory;
    import org.hibernate.Transaction;
    import org.hibernate.cfg.Configuration;
    import org.hibernate.classic.Session;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class App {
    	@Test
    	public void test(){
    		ApplicationContext ac =  new ClassPathXmlApplicationContext("Application.xml");
    		SessionFactory sf = (SessionFactory)ac.getBean("sessionFactory");
    		Session session = sf.openSession();
    		Transaction ts = session.beginTransaction();
    		user u = (user)session.get(user.class, 1);
    		System.out.println(u);
    		System.out.println("success!!!");
    		ts.commit();
    		session.close();
    	}
    }

# 五.结果 #

### 测试时在数据库先创建好表，写入一个数据，通过junit进行测试。 ###

![70][]

结果：

![70 1][]

# 六.spring文件配置的另一种方式 #

### 可以不需要配置hinernate.cfg.xml文件，全部都在spring配置文件中配置，结果一样的 ###

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        	<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        	<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mybase"></property>
        	<property name="user" value="root"></property>
        	<property name="password" value="root"></property>
       </bean>
       
       
       <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
       	  
       	  <property name="dataSource" ref="dataSource"></property>
       	  
       	  <property name="mappingResources">
       	  	<list>
       	  		<value>hib/user.hbm.xml</value>
       	  	</list>
       	  </property>
       	  
       	  <property name="hibernateProperties">
       	  	<props>
       	  		<prop key="dialect">org.hibernate.dialect.MySQLDialect</prop>
       	  	</props>
       	  </property>
       </bean>

[70]: /images/20220515/d1b01f025cf74d1196a1b8ca831a7a9a.png
[70 1]: /images/20220515/90eff16a37b8448389299ba924f84713.png