felx和springHibernate整合传递二进制数据到表中并在flex的dataGrid控件中显示的实践.doc

一、 创建数据库表（使用ms sql2005）create database mydbgouse mydbgocreate table pic(pid int identity primary key, pname varchar(50), photo image)select * from pic二、 建立web工程，并加入相应的spring2.5x的组件包和Hibernate3.x组件包,通过MyEclipse8.x工具生成相应的实体类、映射文件和dao类，生成以后，需要将photo属性类型更改为byte类型，并修改相应的映射文件的类型private byte photo;public byte getPhoto() return this.photo;public void setPhoto(byte photo) this.photo = photo;映射文件的类型改为以下类型 注意：一定要修改，这个很重要完成以上操作以后，将Blazds.war文件解压缩，将其WEB-INF目录下的flex目录和lib目录拷贝到当前工程的WEB-INF目录下。三、 编写业务类，并实现其CRUD方法（1）、业务接口package com.business;import java.util.List;public interface IBusiness public boolean save(Object ob);public boolean update(Object ob);public boolean delById(String id);public Object findById(String id);public List findAll();（2）业务实现package com.business;import java.util.*;import com.dao.PicDAO;import com.po.*;public class PicBusiness implements IBusiness private PicDAO pdao;public PicDAO getPdao() return pdao;public void setPdao(PicDAO pdao) this.pdao = pdao;public boolean delById(String id) / TODO Auto-generated method stubreturn false;public List findAll() / TODO Auto-generated method stubreturn pdao.findAll();public Object findById(String id) / TODO Auto-generated method stubreturn null;public boolean save(Object ob) / TODO Auto-generated method stubPic pic=(Pic) ob;try pdao.save(pic);return true; catch (Exception e) / TODO Auto-generated catch blocke.printStackTrace();return false;public boolean update(Object ob) / TODO Auto-generated method stubreturn false;因为只用到增加和显示，所以其他方法未实现四、 在applicationContext.xml文件中的配置方式org.hibernate.dialect.SQLServerDialecttruecom/po/Pic.hbm.xml修改WEB-INF/web.xml文件,如下所示: contextConfigLocation /WEB-INF/applicationContext.xml flex.messaging.HttpFlexSession org.springframework.web.context.ContextLoaderListener MessageBrokerServlet flex.messaging.MessageBrokerServlet services.configuration.file /WEB-INF/flex/services-config.xml 1 MessageBrokerServlet /messagebroker/* index.jsp BASIC 五、 整合flex需要的SpringFactory类（官方提供的，代码如下），把这个类放置在src的根目录下public class SpringFactory implements FlexFactory private static final String SOURCE = source; /* * This method can be used to initialize the factory itself. It is called with configuration * parameters from the factory tag which defines the id of the factory. */ public void initialize(String id, ConfigMap configMap) /* * This method is called when we initialize the definition of an instance * which will be looked up by this factory. It should validate that * the properties supplied are valid to define an instance. * Any valid properties used for this configuration must be accessed to * avoid warnings about unused configuration elements. If your factory * is only used for application scoped components, this method can simply * return a factory instance which delegates the creation of the component * to the FactoryInstances lookup method. */ public FactoryInstance createFactoryInstance(String id, ConfigMap properties) SpringFactoryInstance instance = new SpringFactoryInstance(this, id, properties); instance.setSource(properties.getPropertyAsString(SOURCE, instance.getId(); return instance; / end method createFactoryInstance() /* * Returns the instance specified by the source * and properties arguments. For the factory, this may mean * constructing a new instance, optionally registering it in some other * name space such as the session or JNDI, and then returning it * or it may mean creating a new instance and returning it. * This method is called for each request to operate on the * given item by the system so it should be relatively efficient. * * If your factory does not support the scope property, it * report an error if scope is supplied in the properties * for this instance. */ public Object lookup(FactoryInstance inst) SpringFactoryInstance factoryInstance = (SpringFactoryInstance) inst; return factoryInstance.lookup(); static class SpringFactoryInstance extends FactoryInstance SpringFactoryInstance(SpringFactory factory, String id, ConfigMap properties) super(factory, id, properties); public String toString() return SpringFactory instance for id= + getId() + source= + getSource() + scope= + getScope(); public Object lookup() ApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(flex.messaging.FlexContext.getServletConfig().getServletContext(); String beanName = getSource(); try return appContext.getBean(beanName); catch (NoSuchBeanDefinitionException nexc) ServiceException e = new ServiceException(); String msg = Spring service named + beanName + does not exist.; e.setMessage(msg); e.setRootCause(nexc); e.setDetails(msg); e.setCode(Server.Processing); throw e; catch (BeansException bexc) ServiceException e = new ServiceException(); String msg = Unable to create Spring service named + beanName + ; e.setMessage(msg); e.setRootCause(bexc); e.setDetails(msg); e.setCode(Server.Processing); throw e; 六、 在当前工程的WEB-INF/flex目录下修改services-config.xml文件，加入以下配置信息：七、 修改WEB-INF/flex目录下修改remoting-config.xml文件，加入以下配置信息：springpicBusiness其中，picBusiness表示为applicationContext.xml文件中配置的业务类的id标示八、 将web工程转为flex工程九、 编写与实体类对应的flex中的as类文件，文件如下所示package com.beanimport flash.utils.ByteArray;RemoteClass(alias=com.po.Pic)public class Picpublic function Pic()public var pid:int;public var pname:String;public var photo:ByteArray;其中photo属性为ByteArray类型与com.po.Pic类中的photo属性的byte类型匹配十、 建立flex的应用，如图所示新建的文件名为picadd.mxml文件，并打开设计视图，页面布局如下Picadd.mxml文件的代码