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

 

<?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>

<?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

 

<?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>

<?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：

 

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;
    }

}

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：

 

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());
    }
}

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：

 

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());
    }
}

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：

 

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;
    }
}

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#