java编程,flex是什么东西
简单的说一下,flex之所以出现,是应为编写flash对于编程人员来说太hard了,编写flash要用美术功底,还要一帧一帧的弄,对程序员来说太难,所以flex应运出世。flex就是以编程(程序员熟悉)的方式来实现flash功能,所用语言为actionscript语言,最后会编译出一个swf文件,也就是flash文件,这样对程序员来说就方便多了。听同事说google地图(网页)好像就是用flex做的。
大学,C语言,数据结构,java,flex,应该沿着什么顺序学习,谢谢
先学C语言吧!如果有微机原理的话,先学微机原理,然后是汇编语言,再是C语言,接着是数据结构,然后是C++,再然后是JAVA和C#。flex放在后面,这时候你可以用java或c#开发服务器端程序了,用flex就可以跟他们通讯了,在接下来,看你兴趣了,想学什么就学什么吧!有编译原理的话,可以好好学学,学好了可以更好地理解程序是怎么编译的。希望对你有帮助,我没上过大学,也不太了解大学的课程。
flex项目如何运行
flash 的安全机制了,在控制面板中的 flash player 设置里。
高级页面内 有个 “授信位置” 制定某些目录里的 swf 可以访问远程数据之类的。
flex调用Java方法连接sqlserver
基于blazeDS的flex4与spring的程序实例步骤
环境:
jdk1.6
j2ee1.5
spring2.5.6
blazeDS3.3
tomcat6.0
flex4
myeclipse8.5
flashBuilder4
步骤:
一、 启动好blazeDS(即启动tomcat,在[tomcat]/webapps目录下产生一个blazeds文件夹(三个war包产生一个blazeds文件夹));
在myeclipse8.5新建一个web Project工程,工程名为webSpring;
把此工程加入blazeDS支持(即用blazeds下的WEB-INF文件夹替换掉web工程下的WEB-INF文件夹);
加入spring支持(把spring相关的jar包拷贝到webSpring/WebRoot/WEB-INF/lib目录下即可)。
二、 1. 在javaWeb工程webSpring的str目录下分别新建一下两个包:
cn.xuediit.myFactory、cn.xuediit.myService;
2. 在cn.xuediit.myFctory包下新建两个类:FlexFactoryImpl.java和SpringFactoryInstance.java
(1). FlexFactoryImpl.java:
package cn.xuediit.myFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import flex.messaging.FactoryInstance;
import flex.messaging.FlexFactory;
import flex.messaging.config.ConfigMap;
public class FlexFactoryImpl implements FlexFactory {
private Log log = LogFactory.getLog(getClass());
/*override interface method*/
public void initialize(String id, ConfigMap configMap) {
System.out.println(“1—flex工厂实现类重写的方法initialize”);
}
/*override interface method*/
public FactoryInstance createFactoryInstance(String id, ConfigMap properties) {
System.out.println(“2—flex工厂实现类重写的方法createFactoryInstance”);
log.info(“Create FactoryInstance.”);
SpringFactoryInstance instance = new SpringFactoryInstance(this, id, properties);
instance.setSource(properties.getPropertyAsString(SOURCE, instance.getId()));
return instance;
}
/*override interface method*/
public Object lookup(FactoryInstance instanceInfo) {
System.out.println(“4—flex工厂实现类重写的方法lookup”);
log.info(“Lookup service object.”);
return instanceInfo.lookup();
}
}
(2).SpringFactoryInstance.java
package cn.xuediit.myFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import flex.messaging.FactoryInstance;
import flex.messaging.FlexContext;
import flex.messaging.FlexFactory;
import flex.messaging.config.ConfigMap;
import flex.messaging.services.ServiceException;
public class SpringFactoryInstance extends FactoryInstance {
private Log log = LogFactory.getLog(getClass());
SpringFactoryInstance(FlexFactory factory, String id, ConfigMap properties) {
super(factory, id, properties);
}
public Object lookup() {
System.out.println(“3—spring工厂类的方法lookup”);
ApplicationContext appContext = WebApplicationContextUtils.getRequiredWebApplicationContext(FlexContext.getServletConfig().getServletContext());
String beanName = getSource();
try {
log.info(“Lookup bean from Spring ApplicationContext: ” + beanName);
return appContext.getBean(beanName);
} catch (NoSuchBeanDefinitionException nex) {
ServiceException e = new ServiceException();
String msg = “Spring service named ‘” + beanName + “‘ does not exist.”;
e.setMessage(msg);
e.setRootCause(nex);
e.setDetails(msg);
e.setCode(“Server.Processing”);
throw e;
} catch (BeansException bex) {
ServiceException e = new ServiceException();
String msg = “Unable to create Spring service named ‘” + beanName + “‘.”;
e.setMessage(msg);
e.setRootCause(bex);
e.setDetails(msg);
e.setCode(“Server.Processing”);
throw e;
} catch (Exception ex) {
ServiceException e = new ServiceException();
String msg = “Unexpected exception when trying to create Spring service named ‘” + beanName + “‘.”;
e.setMessage(msg);
e.setRootCause(ex);
e.setDetails(msg);
e.setCode(“Server.Processing”);
throw e;
}
}
}
3. 在cn.xuediit.myService包下新建两个类:FService.java和FServicesImpl.java
(1). FService.java
package cn.xuediit.myService;
public interface FService {
public String sayHello(String name);
}
(2). FServicesImpl.java
package cn.xuediit.myService;
public class FServicesImpl implements FService {
public String sayHello(String name) {
System.out.println(“5—服务层实现类(本质上的与flex交互的类)”);
return “我是服务层的服务实现类==” + name;
}
}
三、 1、 在javaWeb工程webSpring下,在文件webSpring/WebRoot/WEB-INF/web.xml的web-app标签下添加子节点:
listener
listener-class
org.springframework.web.context.ContextLoaderListener
/listener-class
/listener
2、 在javaWeb工程webSpring下,在webSpring/WebRoot/WEB-INF目录下新建一个文件:applicationContext.xml
?xml version=”1.0″ encoding=”UTF-8″?
beans xmlns=””
xmlns:xsi=””
xmlns:tx=””
xsi:schemaLocation=”
“
bean id=”fServiceImplBeanID” class=”cn.xuediit.myService.FServicesImpl”/bean
/beans
四、 1、 在javaWeb工程webSpring下,在WebRoot/WEB-INF/flex/remoting-config.xml文件中的service标签下添加:
destination id=”destinationID”
properties
factoryflexFactoryImplID/factory
sourcefServiceImplBeanID/source
scopeapplication/scope
/properties
/destination
2、 在javaWeb工程webSpring下,在WebRoot/WEB-INF/flex/services-config.xml文件中的services-config标签下添加:
factories
factory id=”flexFactoryImplID” class=”cn.xuediit.myFactory.FlexFactoryImpl”/
/factories
五、 给此javaWeb工程添加tomcat支持,启动tomcat(这个容易就不说了)。
六、 在flashBuilder下新建一个基于blazeDS的flex项目(以webSpring为后台工程),工程名为webFb;
webFb.mxml:
?xml version=”1.0″ encoding=”utf-8″?
s:Application xmlns:fx=””
xmlns:s=”library://ns.adobe.com/flex/spark”
xmlns:mx=”library://ns.adobe.com/flex/halo”
minWidth=”500″ minHeight=”200″
fx:Script
![CDATA[
import mx.core.Application;
import mx.rpc.events.FaultEvent;
import mx.collections.ArrayCollection;
import mx.rpc.remoting.mxml.RemoteObject;
import mx.controls.Alert;
import mx.rpc.events.ResultEvent;
public function submit(name:String):void{
var remote:RemoteObject = new RemoteObject();
remote.destination = “destinationID”;
remote.endpoint = “”;
remote.addEventListener(ResultEvent.RESULT, myResult);
remote.addEventListener(FaultEvent.FAULT,fault);
remote.sayHello(name);
}
private function myResult(evt:ResultEvent):void{
Alert.show(evt.result.toString());
}
private function fault(evt:FaultEvent):void{
Alert.show(evt.fault.message);
}
]]
/fx:Script
s:Button x=”240″ y=”11″ label=”要发送到” click=”submit(nameTxt.text)”/
s:Label x=”16″ y=”11″ text=”姓名”/
s:TextInput id=”nameTxt” x=”100″ y=”100″/
/s:Application