SSH下使用Spring注解自动注入bean

Spring注解的使用方法详见：http://www.ibm.com/developerworks/cn/java/j-lo-spring25-ioc/，这里在SSH框架下做一个例子。

首先导入相关包：spring-beans-3.0.4.RELEASE.jar（org.springframework.beans.factory.annotation.Autowired用来注入bean）、spring-context-3.0.4.RELEASE.jar（org.springframework.stereotype.Componet 、Service、Repository等用来定义bean）。

其次需要添加相关配置：applicationContext.xml

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
3.     xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"  
4.     xmlns:context="http://www.springframework.org/schema/context"  
5.     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">  
6.   
7.     <description>Spring公共配置 </description>  
8.   
9.     <!-- 配置数据源 -->  
10.     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">  
11.         <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>  
12.         <property name="url" value="jdbc:oracle:thin:@127.0.0.1:1521:cui"/>  
13.         <property name="username" value="cui"/>  
14.         <property name="password" value="cui"/>  
15.     </bean>  
16.       
17.     <!-- 配置sessionFactory -->  
18.     <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">  
19.         <property name="dataSource" ref="dataSource"/>  
20.         <property name="hibernateProperties">  
21.             <props>  
22.                 <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>  
23.                 <prop key="hibernate.show_sql">true</prop>  
24.             </props>  
25.         </property>  
26.         <property name="packagesToScan">  
27.             <list>  
28.                 <value>com.entity</value>  
29.             </list>  
30.         </property>  
31.     </bean>  
32.       
33.     <!-- 事务管理 -->  
34.     <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">  
35.         <property name="sessionFactory" ref="sessionFactory"></property>  
36.     </bean>  
37.       
38.     <!-- 使用annotation自动注入bean,并启动相关处理注解的进程 -->  
39.     <context:component-scan base-package="com">  
40.         <context:include-filter type="regex" expression="com/.dao.*"/>  
41.         <!-- 正则表达式必须格式正确，否则无效。以下是无效的示例  
42.         <context:exclude-filter type="regex" expression="/.service/..*"/>  
43.         <context:exclude-filter type="regex" expression="com/.service*"/>  
44.         <context:exclude-filter type="regex" expression=".service*"/>  
45.          -->  
46.          <!-- 正确格式:从base-package开始  
47.          <context:exclude-filter type="regex" expression="com/.service.*"/>  
48.          <context:exclude-filter type="regex" expression="com/.service/..*"/>  
49.           -->  
50.     </context:component-scan>  
51.   
52. </beans>  

<?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:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <description>Spring公共配置 </description> <!-- 配置数据源 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/> <property name="url" value="jdbc:oracle:thin:@127.0.0.1:1521:cui"/> <property name="username" value="cui"/> <property name="password" value="cui"/> </bean> <!-- 配置sessionFactory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop> <prop key="hibernate.show_sql">true</prop> </props> </property> <property name="packagesToScan"> <list> <value>com.entity</value> </list> </property> </bean> <!-- 事务管理 --> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- 使用annotation自动注入bean,并启动相关处理注解的进程 --> <context:component-scan base-package="com"> <context:include-filter type="regex" expression="com/.dao.*"/> <!-- 正则表达式必须格式正确，否则无效。以下是无效的示例 <context:exclude-filter type="regex" expression="/.service/..*"/> <context:exclude-filter type="regex" expression="com/.service*"/> <context:exclude-filter type="regex" expression=".service*"/> --> <!-- 正确格式:从base-package开始 <context:exclude-filter type="regex" expression="com/.service.*"/> <context:exclude-filter type="regex" expression="com/.service/..*"/> --> </context:component-scan> </beans>

web.xml

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  
3.     <display-name>mytest</display-name>  
4.     <!-- 指定spring配置文件的位置 -->  
5.     <context-param>  
6.         <param-name>contextConfigLocation</param-name>  
7.         <param-value>classpath*:/applicationContext.xml</param-value>  
8.     </context-param>  
9.       
10.     <!-- Struts 2 -->  
11.     <filter>  
12.         <filter-name>struts2</filter-name>  
13.         <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>  
14.         <init-param>  
15.             <param-name>actionPackages</param-name>  
16.             <param-value>com.action</param-value>  
17.         </init-param>  
18.     </filter>  
19.   
20.     <filter-mapping>  
21.         <filter-name>struts2</filter-name>  
22.         <url-pattern>/*</url-pattern>  
23.     </filter-mapping>  
24.       
25.     <!-- 自动加载applicationContext -->  
26.     <listener>  
27.         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
28.     </listener>  
29. </web-app>  

<?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>mytest</display-name> <!-- 指定spring配置文件的位置 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:/applicationContext.xml</param-value> </context-param> <!-- Struts 2 --> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> <init-param> <param-name>actionPackages</param-name> <param-value>com.action</param-value> </init-param> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 自动加载applicationContext --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> </web-app>

使用Hibernate JPA定义User类：

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1. package com.entity;  
2.   
3. import javax.persistence.Column;  
4. import javax.persistence.Entity;  
5. import javax.persistence.GeneratedValue;  
6. import javax.persistence.GenerationType;  
7. import javax.persistence.Id;  
8. import javax.persistence.Table;  
9.   
10. @Entity  
11. @Table(name = "s_user")  
12. public class User {  
13.   
14.     private Long id;  
15.     private String username;  
16.     private String password;  
17.   
18.     @Id  
19.     @GeneratedValue(strategy = GenerationType.AUTO)  
20.     public Long getId() {  
21.         return id;  
22.     }  
23.   
24.     public void setId(Long id) {  
25.         this.id = id;  
26.     }  
27.   
28.     @Column(name = "name")  
29.     public String getUsername() {  
30.         return username;  
31.     }  
32.   
33.     public void setUsername(String username) {  
34.         this.username = username;  
35.     }  
36.   
37.     @Column(name = "pwd")  
38.     public String getPassword() {  
39.         return password;  
40.     }  
41.   
42.     public void setPassword(String password) {  
43.         this.password = password;  
44.     }  
45.   
46. }  

package com.entity; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name = "s_user") public class User { private Long id; private String username; private String password; @Id @GeneratedValue(strategy = GenerationType.AUTO) public Long getId() { return id; } public void setId(Long id) { this.id = id; } @Column(name = "name") public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } @Column(name = "pwd") public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }

Dao层：

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1. package com.dao;  
2.   
3. import com.entity.User;  
4.   
5. public interface UserDao {  
6.     public void save(User user);  
7. }  
8.   
9.   
10. package com.dao.Impl;  
11.   
12. import org.apache.commons.logging.Log;  
13. import org.apache.commons.logging.LogFactory;  
14. import org.hibernate.SessionFactory;  
15. import org.springframework.beans.factory.annotation.Autowired;  
16. import org.springframework.orm.hibernate3.HibernateTemplate;  
17. import org.springframework.stereotype.Repository;  
18.   
19. import com.dao.UserDao;  
20. import com.entity.User;  
21.   
22. @Repository("userDao")  
23. public class UserDaoImpl implements UserDao {  
24.   
25.     private HibernateTemplate template;  
26.     private Log log = LogFactory.getLog(UserDaoImpl.class);  
27.   
28.     //使用构造子注入自动注入sessionFactory   
29.     @Autowired  
30.     public UserDaoImpl(SessionFactory sessionFactory) {  
31.         this.template = new HibernateTemplate(sessionFactory);  
32.     }  
33.   
34.     public void save(User user) {  
35.         template.save(user);  
36.         log.debug("save user:" + user.getUsername());  
37.     }  
38. }  

package com.dao; import com.entity.User; public interface UserDao { public void save(User user); } package com.dao.Impl; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.hibernate.SessionFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.orm.hibernate3.HibernateTemplate; import org.springframework.stereotype.Repository; import com.dao.UserDao; import com.entity.User; @Repository("userDao") public class UserDaoImpl implements UserDao { private HibernateTemplate template; private Log log = LogFactory.getLog(UserDaoImpl.class); //使用构造子注入自动注入sessionFactory @Autowired public UserDaoImpl(SessionFactory sessionFactory) { this.template = new HibernateTemplate(sessionFactory); } public void save(User user) { template.save(user); log.debug("save user:" + user.getUsername()); } }

Service层：

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1. package com.service;  
2. import com.entity.User;  
3.   
4. public interface UserManager {  
5.     public void add(User user);  
6. }  
7.   
8.   
9. package com.service.Impl;  
10.   
11. import org.apache.commons.logging.Log;  
12. import org.apache.commons.logging.LogFactory;  
13. import org.springframework.beans.factory.annotation.Autowired;  
14. import org.springframework.stereotype.Service;  
15.   
16. import com.dao.UserDao;  
17. import com.entity.User;  
18. import com.service.UserManager;  
19.   
20. @Service("userManager")  
21. public class UserManagerImpl implements UserManager {  
22.   
23.     //自动注入userDao，也可以使用@Resource   
24.     @Autowired  
25.     private UserDao userDao;  
26.     private Log log = LogFactory.getLog(UserManagerImpl.class);  
27.   
28.     public void add(User user) {  
29.         userDao.save(user);  
30.         log.debug("add User:" + user.getUsername());  
31.     }  
32. }  

package com.service; import com.entity.User; public interface UserManager { public void add(User user); } package com.service.Impl; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.dao.UserDao; import com.entity.User; import com.service.UserManager; @Service("userManager") public class UserManagerImpl implements UserManager { //自动注入userDao，也可以使用@Resource @Autowired private UserDao userDao; private Log log = LogFactory.getLog(UserManagerImpl.class); public void add(User user) { userDao.save(user); log.debug("add User:" + user.getUsername()); } }

Action：

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1. package com.action.convention;  
2.   
3. import org.apache.struts2.convention.annotation.Result;  
4. import org.springframework.beans.factory.annotation.Autowired;  
5.   
6. import com.entity.User;  
7. import com.opensymphony.xwork2.ActionSupport;  
8. import com.service.UserManager;  
9.   
10. @Result(name = "success", location = "hello.jsp")  
11. public class UserAction extends ActionSupport {  
12.   
13.     private static final long serialVersionUID = 1L;  
14.   
15.     @Autowired  
16.     private UserManager userManager;  
17.   
18.     public String execute() {  
19.         User user = new User();  
20.         user.setUsername("cuihaiyang");  
21.         user.setPassword("abcd");  
22.   
23.         userManager.add(user);  
24.   
25.         return SUCCESS;  
26.     }  
27. }  

package com.action.convention; import org.apache.struts2.convention.annotation.Result; import org.springframework.beans.factory.annotation.Autowired; import com.entity.User; import com.opensymphony.xwork2.ActionSupport; import com.service.UserManager; @Result(name = "success", location = "hello.jsp") public class UserAction extends ActionSupport { private static final long serialVersionUID = 1L; @Autowired private UserManager userManager; public String execute() { User user = new User(); user.setUsername("cuihaiyang"); user.setPassword("abcd"); userManager.add(user); return SUCCESS; } }

调试信息如下：

Hibernate: select hibernate_sequence.nextval from dual
Hibernate: insert into s_user (pwd, name, id) values (?, ?, ?)
2011-03-10 19:44:25,296 [http-8080-1] DEBUG [com.dao.Impl.UserDaoImpl] - save user:cuihaiyang
2011-03-10 19:44:25,296 [http-8080-1] DEBUG [com.service.Impl.UserManagerImpl] - add User:cuihaiyang

转自http://blog.csdn.net/cuihaiyang/article/details/6238257#