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  • 笔记59 Spring+Hibernate整合（二）

    一、项目结构

    二、创建表

    数据库中只有一张表，stock，三个字段：stock_id、stock_code和stock_name。

    1 CREATE TABLE `stock` (
2   `STOCK_ID` int(10) NOT NULL AUTO_INCREMENT,
3   `STOCK_CODE` varchar(10) NOT NULL DEFAULT '',
4   `STOCK_NAME` varchar(20) NOT NULL DEFAULT '',
5   PRIMARY KEY (`STOCK_ID`)
6 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

    三、Model——BO——DAO

    模型中，业务对象(BO)和数据访问对象(DAO)模式是有助于清楚地识别层，以避免弄乱项目结构。

    1.Stock (Model)

    Stock模型类用于数据库存储数据。

    Stock.java

     1 package stock.model;
 2 
 3 import java.io.Serializable;
 4 
 5 public class Stock implements Serializable {
 6 
 7     /**
 8      * 
 9      */
10     private static final long serialVersionUID = 1L;
11     private Long stockId;
12     private String stockCode;
13     private String stockName;
14 
15     public Long getStockId() {
16         return stockId;
17     }
18 
19     public void setStockId(Long stockId) {
20         this.stockId = stockId;
21     }
22 
23     public String getStockCode() {
24         return stockCode;
25     }
26 
27     public void setStockCode(String stockCode) {
28         this.stockCode = stockCode;
29     }
30 
31     public String getStockName() {
32         return stockName;
33     }
34 
35     public void setStockName(String stockName) {
36         this.stockName = stockName;
37     }
38 
39     public String toString() {
40         return "Stock [stockId=" + stockId + ",stockCode=" + stockCode + ",stockName=" + stockName + "]";
41     }
42 }

    2.Stock Business Object (BO)

    　　Stock 业务对象(BO)接口和实现，它是用来存储项目的业务功能，真正的数据库操作(CRUD)的工作不应该参与这一个类，而是有一个DAO(StockDao)类来完成对数据库的抽插。

    StockBo.java

     1 package stock.bo;
 2 
 3 import stock.model.Stock;
 4 
 5 public interface StockBo {
 6 
 7     void save(Stock stock);
 8 
 9     void update(Stock stock);
10 
11     void delete(Stock stock);
12 
13     Stock findByStockCode(String stockCode);
14 }

    StockBoImpl.java

     1 package stock.bo;
 2 
 3 import stock.dao.StockDao;
 4 import stock.model.Stock;
 5 
 6 public class StockBoImpl implements StockBo {
 7 
 8     private StockDao stockDao;
 9 
10     public StockDao getStockDao() {
11         return stockDao;
12     }
13 
14     public void setStockDao(StockDao stockDao) {
15         this.stockDao = stockDao;
16     }
17 
18     @Override
19     public void save(Stock stock) {
20         // TODO Auto-generated method stub
21         stockDao.save(stock);
22     }
23 
24     @Override
25     public void update(Stock stock) {
26         // TODO Auto-generated method stub
27         stockDao.update(stock);
28     }
29 
30     @Override
31     public void delete(Stock stock) {
32         // TODO Auto-generated method stub
33         stockDao.delete(stock);
34     }
35 
36     @Override
37     public Stock findByStockCode(String stockCode) {
38         // TODO Auto-generated method stub
39         return stockDao.findByStockCode(stockCode);
40     }
41 
42 }

    3.Stock (Data Access Object——DAO)

    　　Stock DAO接口和实现，DAO实现类扩展了 Spring 的“HibernateDaoSupport”，以使Spring框架支持Hibernate。通过getHibernateTemplate()执行 Hibernate 功能。

    StockDao.java

     1 package stock.dao;
 2 
 3 import stock.model.Stock;
 4 
 5 public interface StockDao {
 6 
 7     void save(Stock stock);
 8 
 9     void update(Stock stock);
10 
11     void delete(Stock stock);
12 
13     Stock findByStockCode(String stockCode);
14 }

    StockDaoImpl.java

     1 package stock.dao;
 2 
 3 import java.util.List;
 4 
 5 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
 6 
 7 import stock.model.Stock;
 8 
 9 public class StockDaoImpl extends HibernateDaoSupport implements StockDao {
10 
11     @Override
12     public void save(Stock stock) {
13         // TODO Auto-generated method stub
14         getHibernateTemplate().save(stock);
15     }
16 
17     @Override
18     public void update(Stock stock) {
19         // TODO Auto-generated method stub
20         getHibernateTemplate().update(stock);
21     }
22 
23     @Override
24     public void delete(Stock stock) {
25         // TODO Auto-generated method stub
26         getHibernateTemplate().delete(stock);
27     }
28 
29     @Override
30     public Stock findByStockCode(String stockCode) {
31         // TODO Auto-generated method stub
32         @SuppressWarnings("unchecked")
33         List<Stock> stocks = getHibernateTemplate().find("from Stock where stockCode=?", stockCode);
34         return stocks.get(0);
35     }
36 
37 }

    四、资源配置

    为了方便管理，将各个部分的配置都剥离成单独的xml文件。

    （一）Hibernate相关配置

    1.创建Hibernate映射文件（Stock.hbm.xml）的Stock表，并放在包hibernate中。

    Stock.hbm.xml

     1 <?xml version="1.0"?>
 2  
 3 <!DOCTYPE hibernate-mapping PUBLIC
 4         "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 5         "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
 6 <hibernate-mapping package="com.pojo">
 7     <class name="stock.model.Stock" table="stock">
 8         <id name="stockId" type="java.lang.Long">
 9             <column name="STOCK_ID" />
10             <generator class="identity" />
11         </id>
12         <property name="stockCode" type="string">
13             <column name="STOCK_CODE" length="10" not-null="true" unique="true" />
14         </property>
15         <property name="stockName" type="string">
16             <column name="STOCK_NAME" length="20" not-null="true" unique="true" />
17         </property>
18     </class>
19 
20 </hibernate-mapping>

    2.配置数据源DataSource

    在配置过程中需要一个资源文件，用来存放数据库的详细信息，位于properties包中。

    database.properties

    1 jdbc.driverClassName=com.mysql.jdbc.Driver
2 jdbc.url=jdbc:mysql://localhost:3306/stock?characterEncoding=UTF-8
3 jdbc.username=root
4 jdbc.password=123456

    DataSource.xml（database包中）

     1 <beans xmlns="http://www.springframework.org/schema/beans"
 2     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3     xsi:schemaLocation="http://www.springframework.org/schema/beans
 4 http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
 5 
 6     <bean
 7         class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
 8         <property name="location">
 9             <value>properties/database.properties</value>
10         </property>
11     </bean>
12 
13     <bean id="dataSource"
14         class="org.springframework.jdbc.datasource.DriverManagerDataSource">
15         <property name="driverClassName" value="${jdbc.driverClassName}" />
16         <property name="url" value="${jdbc.url}" />
17         <property name="username" value="${jdbc.username}" />
18         <property name="password" value="${jdbc.password}" />
19     </bean>
20 
21 </beans>

    3.配置Hibernate的sessionFactory

    Hibernate.xml（database包中）

     1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xsi:schemaLocation="http://www.springframework.org/schema/beans
 5 http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
 6 
 7     <!-- Hibernate session factory -->
 8     <bean id="sessionFactory"
 9         class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
10 
11         <property name="dataSource">
12             <ref bean="dataSource" />
13         </property>
14 
15         <property name="hibernateProperties">
16             <props>
17                 <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
18                 <prop key="hibernate.show_sql">true</prop>
19                 <prop key="hbm2ddl.auto">update</prop>
20             </props>
21         </property>
22 
23         <property name="mappingResources">
24             <list>
25                 <value>hibernate/Stock.hbm.xml</value>
26             </list>
27         </property>
28 
29     </bean>
30 </beans>

    （二）Spring相关配置

    1.相关bean的注入

    　　创建一个bean配置文件(Stock.xml)的BO和DAO类，把它放入 “spring/beans” 文件夹中。依赖的 DAO(stockDao)bean 注入到 bo(stockBo)bean; SessionFactory 的 bean 成stockDao。

    Stock.xml

    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <!-- Stock business object -->
    <bean id="stockBo" class="stock.bo.StockBoImpl">
        <property name="stockDao" ref="stockDao" />
    </bean>

    <!-- Stock Data Access Object -->
    <bean id="stockDao" class="stock.dao.StockDaoImpl">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

</beans>

    2.整合

    在“spring/config”文件夹中创建配置文件BeanLocations.xml，将所有的配置文件引入。

     1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xsi:schemaLocation="http://www.springframework.org/schema/beans
 5 http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
 6 
 7     <!-- Database Configuration -->
 8     <import resource="classpath:database/DataSource.xml"/>
 9     <import resource="classpath:database/Hibernate.xml"/>
10     
11     <!-- Beans Declaration -->
12     <import resource="classpath:spring/beans/Stock.xml"/>
13 
14 </beans>

    五、测试

     1 package stock.test;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 import stock.bo.StockBo;
 7 import stock.model.Stock;
 8 
 9 public class Test {
10     public static void main(String[] args) {
11         ApplicationContext appContext = new ClassPathXmlApplicationContext("spring/config/BeanLocations.xml");
12 
13         StockBo stockBo = (StockBo) appContext.getBean("stockBo");
14 
15         /** insert **/
16         Stock stock = new Stock();
17         stock.setStockCode("7668");
18         stock.setStockName("HAIO");
19         stockBo.save(stock);
20 
21         /** select **/
22         Stock stock2 = stockBo.findByStockCode("7668");
23         System.out.println(stock2);
24 
25         /** update **/
26         stock2.setStockName("HAIO-1");
27         stockBo.update(stock2);
28 
29         // /** delete **/
30         // stockBo.delete(stock2);
31 
32         System.out.println("Done");
33     }
34 }

    六、总结

    1.结合思想：通过DAO继承HibernateDaoSupport来实现spring和hibernate的整合。

    2.业务层（service）或业务对象（BO）不应该直接对数据库进行抽插，尽量将所有的有关数据库的操作放在DAO层里面。

    七、采用注解

    1.在Stock.xml中进行修改，采用自动扫描包。

     1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:tx="http://www.springframework.org/schema/tx"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
 7         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
 8         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">
 9 
10     <context:component-scan base-package="stock">
11     </context:component-scan>
12 </beans>

    2.修改StockBoImpl.java，增加注解。

    首先标识此类是一个bean，使用@Component注解，然后自动装载所需的DAO bean。

     1 package stock.bo;
 2 
 3 import org.springframework.beans.factory.annotation.Autowired;
 4 import org.springframework.stereotype.Component;
 5 
 6 import stock.dao.StockDao;
 7 import stock.model.Stock;
 8 
 9 @Component
10 public class StockBoImpl implements StockBo {
11 
12     @Autowired
13     private StockDao stockDao;
14 
15     @Override
16     public void save(Stock stock) {
17         // TODO Auto-generated method stub
18         stockDao.save(stock);
19     }
20 
21     @Override
22     public void update(Stock stock) {
23         // TODO Auto-generated method stub
24         stockDao.update(stock);
25     }
26 
27     @Override
28     public void delete(Stock stock) {
29         // TODO Auto-generated method stub
30         stockDao.delete(stock);
31     }
32 
33     @Override
34     public Stock findByStockCode(String stockCode) {
35         // TODO Auto-generated method stub
36         return stockDao.findByStockCode(stockCode);
37     }
38 
39 }

    2.修改StockDaoImpl.java，增加注解。

    spring不会为继承HibernateDaoSupport的对象自动装配sessionFacotry的，不能简单的使用如下语句实现注入：

    1     @Autowired
2     private SessionFactory sessionFactory;

    这样会报错，如下图所示：

    所以必须调用父类的setSessionFactory方法设置sessionfactory。

     1 package stock.dao;
 2 
 3 import java.util.List;
 4 
 5 import org.hibernate.SessionFactory;
 6 import org.springframework.beans.factory.annotation.Autowired;
 7 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
 8 import org.springframework.stereotype.Component;
 9 
10 import stock.model.Stock;
11 
12 @Component
13 public class StockDaoImpl extends HibernateDaoSupport implements StockDao {
14 
15     @Autowired
16     public StockDaoImpl(SessionFactory sessionfactory) {
17         super.setSessionFactory(sessionfactory);
18     }
19 
20     @Override
21     public void save(Stock stock) {
22         // TODO Auto-generated method stub
23         getHibernateTemplate().save(stock);
24     }
25 
26     @Override
27     public void update(Stock stock) {
28         // TODO Auto-generated method stub
29         getHibernateTemplate().update(stock);
30     }
31 
32     @Override
33     public void delete(Stock stock) {
34         // TODO Auto-generated method stub
35         getHibernateTemplate().delete(stock);
36     }
37 
38     @Override
39     public Stock findByStockCode(String stockCode) {
40         // TODO Auto-generated method stub
41         @SuppressWarnings("unchecked")
42         List<Stock> stocks = getHibernateTemplate().find("from Stock where stockCode=?", stockCode);
43         return stocks.get(0);
44     }
45 
46 }

    3.修改Test里面获取bean的方法。

    1 StockBo stockBo = (StockBo) appContext.getBean(StockBo.class);
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  • 原文地址：https://www.cnblogs.com/lyj-gyq/p/9256042.html
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