S2SH整合

Struts2、Spring、Hibernate三大框架在一个项目中的具体职责分配如下：

三大框架整合，导入各个框架和整合所需的包（本项目采用的是Struts2.3+spring3.0+hibernate）

1.添加Spring框架

1）编写applicationContext-bean.xml文件

<?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: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">

    <bean id="date" class="java.util.Date"></bean>

</beans>

2）测试

public class SSHTest {

    @Test
    public void spring(){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext-*.xml");
        System.out.println(context.getBean("date"));
    }

}

若测试通过，则spring框架添加成功

2.添加Hibernate框架

1）添加hibernate配置文件

<?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="dialect">
        org.hibernate.dialect.MySQLDialect
    </property>
    <property name="connection.url">
        jdbc:mysql://localhost:3306/shop
    </property>
    <property name="connection.username">root</property>
    <property name="connection.password">123456</property>
    <property name="connection.driver_class">
        com.mysql.jdbc.Driver
    </property>
    <property name="c3p0.initialPoolSize">5</property>
    <property name="c3p0.minPoolSize">10</property>
    <property name="c3p0.maxPoolSize">20</property>
    <property name="c3p0.checkoutTimeout">6000</property>
    <property name="show_sql">true</property>
</session-factory>
</hibernate-configuration>

该配置文件中采用了数据库连接池

2）编写测试工具类

HibernateSessionFactory.java

package cn.lsl.test;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;

public class HibernateSessionFactory {

    private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private static Configuration configuration = new Configuration();
    private static org.hibernate.SessionFactory sessionFactory;
    private static String configFile = CONFIG_FILE_LOCATION;

    static {
        try {
            configuration.configure(configFile);
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception e) {
            System.err.println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }

    private HibernateSessionFactory() {
    }

    public static Session getSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

        if (session == null || !session.isOpen()) {
            if (sessionFactory == null) {
                rebuildSessionFactory();
            }
            session = (sessionFactory != null) ? sessionFactory.openSession()
                    : null;
            threadLocal.set(session);
        }

        return session;
    }

    public static void rebuildSessionFactory() {
        try {
            configuration.configure(configFile);
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception e) {
            System.err.println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }

    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }

    public static org.hibernate.SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    public static void setConfigFile(String configFile) {
        HibernateSessionFactory.configFile = configFile;
        sessionFactory = null;
    }

    public static Configuration getConfiguration() {
        return configuration;
    }
}

3）测试

@Test
    public void hibernate(){
        System.out.println(HibernateSessionFactory.getSessionFactory());
    }

若测试通过，则Hibernate框架添加成功

3.Hibernate与Spring框架整合

1）配置LocalSessionFactoryBean

<!--
        1: Spring来管理Hibernate配置文件,就是取代了HibernateSessionFactory
     -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
         <!-- 加载hibernate的配置文件 -->
         <property name="configLocation" value="classpath:hibernate.cfg.xml" />
     </bean>

2）配置hibernateTemplate

<!--
         2.通过sessionFactory,返回session,在Spring由HibenrateTemplate封装session
      -->
      <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
          <!-- 需要sessionFactory -->
          <property name="sessionFactory" ref="sessionFactory" />
     </bean>

3）配置事务管理器

 <!--
         3.配置事物管理器transactionManager
         如果要实现Spring的AOP声明式事务,则需要Spring提供事物管理器,所有session都是从sessionFactory创建的,
        事务管理器,需要控制sessionFactory
      -->
     <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
         <property name="sessionFactory" ref="sessionFactory" />
     </bean>

4）配置事物通知

<!-- 4 配置事务通知: 事务由事务管理器提供 -->
     <tx:advice id="advice" transaction-manager="transactionManager">
         <tx:attributes>
             <tx:method name="save*" propagation="REQUIRED"/>
             <tx:method name="delete*" propagation="REQUIRED"/>
             <tx:method name="update*" propagation="REQUIRED"/>
             <tx:method name="*" propagation="NEVER" read-only="true"/>
         </tx:attributes>
     </tx:advice>

5）配置切入点表达式

 <!-- 5: 切入表达式: 配置运行的时候*包的*类切入通知 -->
     <aop:config>
         <aop:pointcut expression="execution(* cn.lsl.shop.service.impl.*.*(..))" id="pointcut"/>
         <aop:advisor advice-ref="advice" pointcut-ref="pointcut"/>
     </aop:config>

6）编写实体类和映射文件

package cn.lsl.shop.pojo;

public class Category implements java.io.Serializable {
    private Integer cid;
    private String ctype;
    private Boolean chot;
    private Integer aid;

    public Category() {
        super();
        // TODO Auto-generated constructor stub
    }
    public Category(String ctype, Boolean chot, Integer aid) {
        super();this.ctype = ctype;
        this.chot = chot;
        this.aid = aid;
    }
    public Integer getCid() {
        return cid;
    }
    public void setCid(Integer cid) {
        this.cid = cid;
    }
    public String getCtype() {
        return ctype;
    }
    public void setCtype(String ctype) {
        this.ctype = ctype;
    }
    public Boolean getChot() {
        return chot;
    }
    public void setChot(Boolean chot) {
        this.chot = chot;
    }
    public Integer getAid() {
        return aid;
    }
    public void setAid(Integer aid) {
        this.aid = aid;
    }
}

映射文件

<?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>
    <class name="cn.lsl.shop.pojo.Category" table="category">
        <id name="cid" type="java.lang.Integer">
            <column name="cid" />
            <generator class="native"></generator>
        </id>
        <property name="ctype" type="java.lang.String">
            <column name="ctype" length="20" />
        </property>
        <property name="chot" type="java.lang.Boolean">
            <column name="chot" />
        </property>
        <property name="aid" type="java.lang.Integer">
            <column name="aid" />
        </property>
    </class>
</hibernate-mapping>

最后记得在hibernate.cfg.xml文件中添加

<mapping resource="cn/lsl/shop/pojo/Category.hbm.xml" />

7）编写Service层

package cn.lsl.shop.service.impl;

import org.springframework.orm.hibernate3.HibernateTemplate;

import cn.lsl.shop.pojo.Category;

public class CategoryServiceImpl {
    private HibernateTemplate hibernateTemplate = null;

    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
        this.hibernateTemplate = hibernateTemplate;
    }

    public void save(Category category){
        hibernateTemplate.save(category);
    }
}

并纳入Spring容器管理

<bean id="categoryServiceImpl" class="cn.lsl.shop.service.impl.CategoryServiceImpl">
        <property name="hibernateTemplate" ref="hibernateTemplate" />
    </bean>

8）测试

/*
     * Spring管理Hibernate,采用AOP实现声明式事物
     *
     * 加载Spring与Hibernate整合的jar包
     * */
    @Test
    public void springHibernate(){
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext-*.xml");
        CategoryServiceImpl categoryServiceImpl=(CategoryServiceImpl)context.getBean("categoryServiceImpl");
        Category category=new Category("test",false,1);
        categoryServiceImpl.save(category);
    }

若数据成功插入数据库，则Spring和Hibernate整和成功

4.添加struts2框架

1）编写Action类

package cn.lsl.shop.action;

import cn.lsl.shop.service.impl.CategoryServiceImpl;

public class TestAction {
   public String test(){
        System.out.println(categoryServiceImpl);
        return "success";
    }
}

2）编写配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
    <!--
            注意：添加jar包的时候要刷新tomcat中项目
        Struts 与Spring的整合作用: Spring来管理Action,从而实现Action与Service解耦
     -->
    <!-- struts-default 使用默认Struts拦截器 -->
    <package name="shop" extends="struts-default">
        <action name="testAction_*" class="cn.lsl.shop.action.TestAction" method="{1}">
            <!-- struts2中 重定向可以忽略工程名 -->
            <result name="success" type="redirect">/success.jsp</result>
        </action>
    </package>
</struts>  

3）配置web.xml文件

<!-- 配置Struts2的过滤器 -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>*.action</url-pattern>
    </filter-mapping>

5.整合Spring和Struts2

1）修改Action类，并纳入spring管理

public class TestAction {

    private CategoryServiceImpl categoryServiceImpl=null;

    public void setCategoryServiceImpl(CategoryServiceImpl categoryServiceImpl) {
        this.categoryServiceImpl = categoryServiceImpl;
    } 

    public String test(){
        System.out.println(categoryServiceImpl);
        return "success";
    }
}

<bean id="testAction" class="cn.lsl.shop.action.TestAction">
        <property name="categoryServiceImpl" ref="categoryServiceImpl" />
    </bean>

2）修改配置文件

<package name="shop" namespace="/" extends="struts-default">
        <action name="testAction_*" class="testAction" method="{1}">
            <!-- struts2中 重定向可以忽略工程名 -->
            <result name="success" type="redirect">/success.jsp</result>
        </action>
    </package>

3）在web.xml文件中配置Spring监听器

<!-- 配置Spring的ContextLoaderListener监听器 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:applicationContext-*.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

4）测试

http://localhost:8080/shop/testAction_test.action