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 [Tapestry]spring and hibernate,spring and tapestry整合篇
软件技术, 电脑与网络
lhwork 发表于 2006/6/30 15:58:26 |
| 目前java开源框架真可以说是琳琅满目，最近一个多星期一直在接触spring、hibernate、tapestry。将最近一个多星期以来的学习汇总一下，以便日后查阅，也方便大家学习。简单的介绍到处都是，对于spring、hibernate、tapestry是干什么用的，我就不多介绍了。大致能够知道spring的IOC/DI概念（AOP方面我也理解不好，暂时）、hibernate的基本概念，如对象持久，ORM，POJO这些概念，tapestry重在组件。我想懂这些并且做个简单小例子，理解本文应该就没什么大问题了。我的开发环境是eclipse3.1+tomcat5.0.18+jdk1.4.2/jdk1.5 +mysql+这些相关jar包注：spring1.2+hibernate2.1+tapestry3.0.3对于eclipse的操作这里不做详细介绍，下面会给出整合代码。建立项目如together，引入需要的包，方便起见就把spring.jar引入，因为它比较全，它没有包含mock（主要是测试用的）。总之是把这些都导进到你的project里来。别import时候找不到就可以了。Spring和hibernate结合部分：数据库准备工作：如mysql，建库为learn，建表为customer，包含字段（aid，username，password）分别为int，varchar型。相关代码（代码存放位置）：spring-hibernate.xml（与src保持同级）<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans> <description>test spring and hibernate</description> <!-- datasource --> <bean id="datasource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName"> <value>com.mysql.jdbc.Driver</value> </property> <property name="url"> <value>jdbc:mysql://localhost/learn</value> </property> <property name="username"> <value>root</value> </property> <property name="password"> <value></value> </property> </bean> <!-- hibernate support --> <bean id="sessionFactory" class="org.springframework.orm.hibernate.LocalSessionFactoryBean"> <property name="dataSource"> <ref local="datasource" /> </property> <property name="mappingResources"> <list> <value>yunguang/learn/springandhibernate/Customer.hbm.xml</value> </list> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> net.sf.hibernate.dialect.MySQLDialect </prop> <prop key="hibernate.show_sql">true</prop> </props> </property> </bean> <!-- hibernate dao --> <bean id="hibernatedao" class="yunguang.spring.dao.TestDao"> <property name="sessionFactory"> <ref local="sessionFactory" /> </property> </bean></beans>customer.hbm.xml（yunguang.learn.springandhibernate包下）<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN""http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd"><hibernate-mapping> <class name="yunguang.learn.springandhibernate.Customer" table="customer"> <id name="id" column="aid"> <generator class="increment" /> </id> <property name="username" column="username" /> <property name="password" column="password" /> </class></hibernate-mapping>/* * Created on 2005-7-6 * * TODO To change the template for this generated file go to * Window - Preferences - Java - Code Style - Code Templates */package yunguang.learn.springandhibernate;/** * @author Administrator * * TODO To change the template for this generated type comment go to Window - * Preferences - Java - Code Style - Code Templates */public class Customer { private int id; private String username; private String password; public int getId() { return id; } public String getPassword() { return password; } public String getUsername() { return username; } public void setId(int id) { this.id = id; } public void setPassword(String password) { this.password = password; } public void setUsername(String username) { this.username = username; }}单元测试类package test.junit;import junit.framework.TestCase;import junit.textui.TestRunner;import org.springframework.context.ApplicationContext;import org.springframework.context.support.FileSystemXmlApplicationContext;import yunguang.learn.springandhibernate.Customer;import yunguang.spring.dao.ITestDao;public class TestDaoTest extends TestCase { public void testInsertTest(){ ApplicationContext beans = new FileSystemXmlApplicationContext("spring-hibernate.xml");// XmlBeanFactory beans = new XmlBeanFactory(new FileInputStream(// "spring-hibernate.xml")); ITestDao tests = (ITestDao) beans.getBean("hibernatedao"); Customer customer = new Customer(); customer.setId(55); customer.setUsername("yunguangtest=================="); customer.setPassword("passwordsdlkjfklsd"); tests.insertTest(customer); } public static void main(String[] args) { TestRunner.run(TestDaoTest.class); }}以eclipse中的junite运行这一单元测试。即可一路跑绿，查看数据库完成插入操作。小结：核心为spring-hibernate.xml，利用spring的依赖注入的特性。不用单独配置hibernate的配置文件（hibernate.cfg.xml和hibernate.properties）。其他部分见代码吧！如果单独都能各自都能理解，则看上面代码不会有什么太大障碍。spring和tapestry结合部分：相关代码（代码存放位置）：前提当然是建立web project，才能使tapestry发挥其作用，才能完整此例子的练习。这里我只是在tomcat下建立deploy并且简单测试了一下：Web.xml：（这个文件我想大家都知道放在哪里吧。呵呵）<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"><!-- generated by Spindle, http://spindle.sourceforge.net --><web-app> <display-name>together</display-name> <!-- Redirect it to the servlet mapping address /h--> <!-- <filter> <filter-name>redirect</filter-name> <filter-class>org.apache.tapestry.RedirectFilter</filter-class> </filter> <filter-mapping> <filter-name>redirect</filter-name> <url-pattern>/</url-pattern> </filter-mapping> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/springandtapestry.xml</param-value> </context-param> <servlet> <servlet-name>context</servlet-name> <servlet-class> org.springframework.web.context.ContextLoaderServlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet> <servlet-name>together</servlet-name> <servlet-class> org.apache.tapestry.ApplicationServlet </servlet-class> </servlet> <servlet-mapping> <servlet-name>together</servlet-name> <url-pattern>/app</url-pattern> </servlet-mapping> <session-config> <session-timeout>15</session-timeout> </session-config> <welcome-file-list> <welcome-file>Home.html</welcome-file> </welcome-file-list></web-app>Springandtapestry.xml（这个和web.xml 放在同个目录下，即web-inf目录下）<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN""http://www.springframework.org/dtd/spring-beans.dtd"><beans> <bean id="aBean" class="yunguang.learn.springandtapestry.Bean"></bean></beans>Together. application（与project同名的xml文件。这是tapestry的要求）<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE application PUBLIC "-//Apache Software Foundation//Tapestry Specification 3.0//EN" "http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd"><!-- generated by Spindle, http://spindle.sourceforge.net --><application name="together" engine-class="yunguang.learn.springandtapestry.MyEngine"> <description> add a description </description> <page name="Home" specification-path="Home.page"/> </application>Home.html（在你的tapestry能够访问到的默认目录）<span jwcid="$Content$"><table width="337" border="1"> <tr align="center"> <td><span jwcid="@Insert" value="ognl:aBean.amethod" /></td> </tr></table></span>Home.page（与home.html同级）<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE page-specification PUBLIC "-//Apache Software Foundation//Tapestry Specification 3.0//EN" "http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd"><page-specification class="yunguang.learn.springandtapestry.Home"> <property-specification name="aBean" type="yunguang.learn.springandtapestry.IBean"> global.appContext.getBean("aBean") </property-specification></page-specification>相关类文件：package yunguang.learn.springandtapestry;public interface IBean { public String getAmethod();}package yunguang.learn.springandtapestry;public class Bean implements IBean { public String getAmethod() { // do something; System.out .println("================================================test a amethod============================================="); return "===================test==========================="; }}package yunguang.learn.springandtapestry;public class Global {}package yunguang.learn.springandtapestry;import java.util.Map;import org.apache.tapestry.engine.BaseEngine;import org.apache.tapestry.request.RequestContext;import org.springframework.context.ApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;public class MyEngine extends BaseEngine { public static final String APPLICATION_CONTEXT_KEY = "appContext"; protected void setupForRequest(RequestContext context) { super.setupForRequest(context); Map global = (Map) getGlobal(); ApplicationContext ac = (ApplicationContext) global .get(APPLICATION_CONTEXT_KEY); if (ac == null) { ac = WebApplicationContextUtils.getWebApplicationContext(context .getServlet().getServletContext()); System.out.println("测试" + ac); global.put(APPLICATION_CONTEXT_KEY, ac); } }}package yunguang.learn.springandtapestry;import org.apache.tapestry.event.PageEvent;import org.apache.tapestry.event.PageRenderListener;import org.apache.tapestry.html.BasePage;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;public abstract class Home extends BasePage implements PageRenderListener { public abstract IBean getABean(); /** 当页面表现之前，首先运行这个方法 */ public void pageBeginRender(PageEvent event) { WebApplicationContext appContext = WebApplicationContextUtils .getWebApplicationContext(getRequestCycle().getRequestContext() .getServlet().getServletContext()); IBean bean = (IBean) appContext.getBean("aBean"); //bean.getAmethod(); }}小结：核心在于利用engine部分，通过定义map的global。然后在home.page中可以进行通过global.appContext.getBean("aBean")对home.java中abstract属性进行赋值。另外：<context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/springandtapestry.xml</param-value> </context-param>这部分是个小小重点！如果把此xml文件改成spring默认的xml文件，则不需要此配置参数过程。一个小疑惑是：在home.html中"ognl:aBean.Amethod"中的amethod中的a大小写都可以。我觉得应该小写a是正确的，但是错误的写成大写A了居然也可以正常显示。还是看看tapestry源代码吧。以后再写了！希望本文对你有所帮助。至于其中原理，我想可以通过breakpoint方式一步一步跟下去就明白了。当然完成本文例子需要有基本的spring、hibernate、tapestry知识。而高手们就不要见笑了。就当看看笑话吧！其实距离真正结合还差一步，因为并没有通过tapestry作为view，而spring作为主体框架，实现hibernate的对象持久。逻辑清了，下面也就不难了。GOOD LUCK！ |
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