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>
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>
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;
- }
- }
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());
- }
- }
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());
- }
- }
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;
- }
- }
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