Flex与服务器交互之四（使用RemoteObject +BlazeDS+TomCat同Java交互及开发环境配置） .

 由于Flex只是一种客户端技术其本身并不能直接同数据库交互，在实际的应用开发过程中Flex提供了如URLRequest、HTTPService、RemoteObject、WebService等类以实现同服务器的通讯和数据交互，下面做一些介绍和实例解析:
   本示例用到的开发工具和组件：jdk1.6、eclipse3.0、  FlexBuilder3.0、  blazeds-turnkey-3.3.0.9885(已包含Tomcat)
   1、安装JDK至指定目录下如：C:/Program Files/Java/jdk1.6.0_16
   2、解压blazeds-turnkey-3.3.0.9885.zip 将tomcat目录拷贝至：D:/Program Files/tomcat
   3、配置或加入我的电脑环境变量：

JAVA_HOME       C:/Program Files/Java/jdk1.6.0_16
CATALINA_BASE   D:/Program Files/tomcat
CATALINE_HOME   D:/Program Files/tomcat
CLASSPATH       %JAVA_HOME%/lib;%CATALINA_HOME%/lib/servlet-api.jar
Path            %JAVA_HOME%/bin;%JAVA_HOME%/lib;

JAVA_HOME C:/Program Files/Java/jdk1.6.0_16 CATALINA_BASE D:/Program Files/tomcat CATALINE_HOME D:/Program Files/tomcat CLASSPATH %JAVA_HOME%/lib;%CATALINA_HOME%/lib/servlet-api.jar Path %JAVA_HOME%/bin;%JAVA_HOME%/lib; 
   4、查看Tomcat服务器配置信息：
      查看D:/Program Files/tomcat/conf/server.xml文件
      找到 <Connector port="8400" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="9400" />
      配置的端口信息为“8400”
   5、手动方式启动TomCat检查是否配置成功(当然你也可以在Eclipse中安装TomCat插件控制Tomcat)：
      启动命令行“cd D:/Program Files/tomcat/bin”定位至Tomcat Bin目录
      运行“startup.bat”启动TomCat看到如下（启动成功）：

 

      浏览器中输入：“http://localhost:8400/”如下（恭喜JAVA环境+BlazeDS+Tomcat配置成功）：

   6、建立开发文件夹，拷贝BlazeDS配置文件和用到的配置文件及类库“WEB-INF”至站点目录：
      找到blazeds.war个改后缀为RAR解压找到“WEB-INF”文件夹拷贝至"WebSite"下目录结构如：

      这样做的目的是将JAVA项目同Flex项目Web站点目录分开互不干扰（使用eclipse的Flex开发插件有时会报莫名的错误，Flex开发还是建议用FlexBuilder）
   7、在Eclipse中新建java项目并将编译路径链接至“../WebSite/WEB-INF/classes”目录下如图：

 

 

   8、发布WebSite至TomCat：
      在“D:/Program Files/tomcat/conf/server.xml”文件<Host>节点中新增如下<Context>节点重启TomCat（执行第5步骤运行“shutdown.bat”再运行“startup.bat”）

<Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true"
            xmlValidation="false" xmlNamespaceAware="false">
  <Context path="/WebSite" docBase="E:/学习/BlazeDs/WebSite" debug="0" reloadable="true" crossContext="true" />
 </Host>

<Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false"> <Context path="/WebSite" docBase="E:/学习/BlazeDs/WebSite" debug="0" reloadable="true" crossContext="true" /> </Host>

 

   9、新建FLEX 服务器为J2EE的“myBlazeDSFlex”项目至"E:/学习/BlazeDs/Flex"目录

   10、配置服务器及Flex输出目录至“webSite/flex"下,并“Validate Configuration”通过(如图)：

   11、你也可以手动设置Felx项目属性(如图)来配置J2EE服务器:

   12、在eclipse中编写完成Java类及方法 并编译：
       UserBean类：
 

package myBlazeDS;
  public class UserBean {
   private String _name;
   private int _age;
   private String _address;
   public UserBean(String name,int age,String address)
  {
    this._name = name;
    this._age = age;
    this._address = address;
  }

   public void setName(String name)
  {
    this._name = name;
  }
   public String getName()
  {
    return this._name;
  }

   public void setAge(int age)
  {
    this._age = age;
  }
   public int getAge()
  {
    return this._age;
  }

   public void setAddress(String address)
  {
    this._address = address;
  }
   public String getAddress()
  {
    return this._address;
  }
 }

package myBlazeDS; public class UserBean { private String _name; private int _age; private String _address; public UserBean(String name,int age,String address) { this._name = name; this._age = age; this._address = address; } public void setName(String name) { this._name = name; } public String getName() { return this._name; } public void setAge(int age) { this._age = age; } public int getAge() { return this._age; } public void setAddress(String address) { this._address = address; } public String getAddress() { return this._address; } }  

 

 外部接口类BlazeDSService:
 

package myBlazeDS;

  public class BlazeDSService {
   public String GetBlazeService(String user)
  {
    return user +":欢迎使用Java　BlazeDS同Flex交互";
  }
   public UserBean GetUserInfo(String name,int age,String address)
  {
    return new UserBean("User:" + name, age,address + " China");
  }
 }

package myBlazeDS; public class BlazeDSService { public String GetBlazeService(String user) { return user +":欢迎使用Java　BlazeDS同Flex交互"; } public UserBean GetUserInfo(String name,int age,String address) { return new UserBean("User:" + name, age,address + " China"); } }

 

　　13、配置“E:/学习/BlazeDs/WebSite/WEB-INF/flex/remoting-config.xml”增加（如图）：

<destination id="FirstBlazeService">
 <properties>
  <source>
  myBlazeDS.BlazeDSService
  </source>
  <scope>application</scope>
 </properties>
 </destination>

<destination id="FirstBlazeService"> <properties> <source> myBlazeDS.BlazeDSService </source> <scope>application</scope> </properties> </destination> 

 

    14、在Flex引入RemoteObject 指定destination属性加入调用方法<mx:method>节点如：

<mx:RemoteObject id="myJavaService" destination="FirstBlazeService" showBusyCursor="true">
  <mx:method name="GetBlazeService" fault="onBlazeDSFalut(event)" />
  <mx:method name="GetUserInfo" result="getUserBean(event)" fault="onBlazeDSFalut(event)" />
 </mx:RemoteObject>

<mx:RemoteObject id="myJavaService" destination="FirstBlazeService" showBusyCursor="true"> <mx:method name="GetBlazeService" fault="onBlazeDSFalut(event)" /> <mx:method name="GetUserInfo" result="getUserBean(event)" fault="onBlazeDSFalut(event)" /> </mx:RemoteObject>

 

　　15、完整体Flex页面代码：
　　 

<?xml version="1.0" encoding="utf-8"?>
  <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
  <mx:RemoteObject id="myJavaService" destination="FirstBlazeService" showBusyCursor="true">
   <mx:method name="GetBlazeService" fault="onBlazeDSFalut(event)" />
   <mx:method name="GetUserInfo" result="getUserBean(event)" fault="onBlazeDSFalut(event)" />
  </mx:RemoteObject>
  <mx:Canvas width="653" height="190" x="10" backgroundColor="#297E8D" fontSize="15">
   <mx:Script>
   <!--[CDATA[
    import mx.rpc.events.FaultEvent;
    import mx.rpc.events.ResultEvent;
    import mx.controls.Alert;
    import mx.core.UIComponent;
    import mx.core.BitmapAsset;
    import mx.core.ByteArrayAsset;
    private function onCallJava():void
    {
     myJavaService.GetBlazeService(nameInput.text);
    }
    private function onCallBean():void
    {
     myJavaService.GetUserInfo(txtName.text,int(txtAge.text),txtAddress.text);

    }
    private function getUserBean(e:ResultEvent):void
    {
     var o:*=e.result as Object;
      vtxtName.text = o.name;
      vtxtAge.text = o.age;
      vtxtAddress.text = o.address;
    }
    private function onBlazeDSFalut(e:FaultEvent):void
    {
     Alert.show(e.message.toString());
    }
    ]]-->
   </mx:Script>
   <mx:TextInput id="nameInput"  x="108" y="18" width="145"/>
   <mx:Button label="Call Java" click="onCallJava();" x="274" y="18" fillAlphas="[1.0, 1.0]"/>
   <mx:TextArea text="{myJavaService.GetBlazeService.lastResult}"  x="397" height="34" width="246" y="19"/>
   <mx:Label x="10" y="61" width="632" height="2"/>
   <mx:Label x="10" y="80" text="UserName:"/>
   <mx:Label x="10" y="117" text="UserAge:"/>
   <mx:Label x="10" y="150" text="Address:"/>
   <mx:TextInput x="108" y="78" id="txtName" width="146"/>
   <mx:TextInput x="107" y="115" id="txtAge" width="147"/>
   <mx:TextInput x="107" y="148" id="txtAddress" width="147"/>
   <mx:Button x="272" y="112" label="Call Bean" id="btnCallBean" click="onCallBean();"/>
   <mx:Text x="397" y="80" width="246" id="vtxtName"/>
   <mx:Text x="397" y="117" width="246" id="vtxtAge"/>
   <mx:Text x="397" y="150" width="246" id="vtxtAddress"/>
   </mx:Canvas>
  </mx:Application>

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:RemoteObject id="myJavaService" destination="FirstBlazeService" showBusyCursor="true"> <mx:method name="GetBlazeService" fault="onBlazeDSFalut(event)" /> <mx:method name="GetUserInfo" result="getUserBean(event)" fault="onBlazeDSFalut(event)" /> </mx:RemoteObject> <mx:Canvas width="653" height="190" x="10" backgroundColor="#297E8D" fontSize="15"> <mx:Script> <!--[CDATA[ import mx.rpc.events.FaultEvent; import mx.rpc.events.ResultEvent; import mx.controls.Alert; import mx.core.UIComponent; import mx.core.BitmapAsset; import mx.core.ByteArrayAsset; private function onCallJava():void { myJavaService.GetBlazeService(nameInput.text); } private function onCallBean():void { myJavaService.GetUserInfo(txtName.text,int(txtAge.text),txtAddress.text); } private function getUserBean(e:ResultEvent):void { var o:*=e.result as Object; vtxtName.text = o.name; vtxtAge.text = o.age; vtxtAddress.text = o.address; } private function onBlazeDSFalut(e:FaultEvent):void { Alert.show(e.message.toString()); } ]]--> </mx:Script> <mx:TextInput id="nameInput" x="108" y="18" width="145"/> <mx:Button label="Call Java" click="onCallJava();" x="274" y="18" fillAlphas="[1.0, 1.0]"/> <mx:TextArea text="{myJavaService.GetBlazeService.lastResult}" x="397" height="34" width="246" y="19"/> <mx:Label x="10" y="61" width="632" height="2"/> <mx:Label x="10" y="80" text="UserName:"/> <mx:Label x="10" y="117" text="UserAge:"/> <mx:Label x="10" y="150" text="Address:"/> <mx:TextInput x="108" y="78" id="txtName" width="146"/> <mx:TextInput x="107" y="115" id="txtAge" width="147"/> <mx:TextInput x="107" y="148" id="txtAddress" width="147"/> <mx:Button x="272" y="112" label="Call Bean" id="btnCallBean" click="onCallBean();"/> <mx:Text x="397" y="80" width="246" id="vtxtName"/> <mx:Text x="397" y="117" width="246" id="vtxtAge"/> <mx:Text x="397" y="150" width="246" id="vtxtAddress"/> </mx:Canvas> </mx:Application> 　　

 

      16、DEMO完成后目录结构如图：

 

　　17、DEMO功能完成最终效果如图：源码下载：
　　

　　flex还可以通过如XMLSocket　FMS　二进制套接字等同服务器交互，就不再赘述了本系列课程到此告一段落!