AIR 迷你教程 — 在AIR 2.0 程序中嵌入TOMCAT（NativeProcess 实例）
AIR 2.0 有很多令人期待和振奋的功能，使得AIR向成熟的桌面应用程序开发环境又进了一大步。上一篇文章里介绍了ServerSocket的用法，这篇教程中将向大家介绍NativeProcess，在AIR2.0中我们可以使用程序默认的打开方式直接打开一个外部的应用程序 (file.openWithDefaultApplication())或者 通过今天要讲的启动进程方式运行一个程序。
AIR与本地应用程序的交互是AIR 2.0的一个重要更新，这个功能的实现可以帮助我们做到在AIR 1.5时代很难完成的事情，比如我在项目中就需要操作一些硬件，但AIR不能直接操作端口，所以只能借助其他的小程序来实现，现在我们就可以很容易的操作这些小程序以达到操作硬件的目的，而Flex (AIR)与JAVA的结合很早就已经开始了，但由于早期AIR的局限性，想要把JAVA直接部署在客户端还是比较麻烦的事情，但是从AIR2.0开始我们不用担心了。现在我们用很简单的方式就可以在AIR程序中集成TOMCAT, 一次性的将后台与AIR部署到客户端。
程序的原版（Flash Builder 4版）同样是从http://coenraets.org/获得，有兴趣的朋友可以关注这个博客。我的例子仍然使用FLEX 3.
Demo过程
[*]下载安装 AIR 2.0 beta runtime.
[*]下载AIRAppWithEmbeddedTomcat..exe 或者 AIRAppWithEmbeddedTomcat.dmg (NativeProcess 必须在程序发布为相应平台的应用程序后才可以使用，发布的方法这里就不介绍了，可以参看http://help.adobe.com/en_US/FlashPlatform/develop/air/building_apps/WS789ea67d3e73a8b22388411123785d839c-8000.html)
[*]安装运行AIRAppWithEmbeddedTomcat.exe, 修改JAVA_HOME，如果默认的路径不对
[*]点击 “启动” 可以开启TOMCAT(端口是8080)。在JSP实例和RemoteObject实例中可以看见加载JSP页面和使用RemoteObject获取数据的测试。
控制台
JSP 加载测试
RemoteObject 测试
源代码
<?xml version="1.0" encoding="utf-8"?>
<!--www.flextheworld.com-->
<mx:WindowedApplication applicationComplete="init()" xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" height="600" width="800" >
<mx:Script>
<![CDATA[
import mx.controls.Alert;
//用于启动和停止Tomcat的进程
private var startTomcatProcess:NativeProcess;
private var stopTomcatProcess:NativeProcess;
private var tomcatHomeDir:File;
public function init():void
{
if (!NativeProcess.isSupported)
{
Alert.show("不支持进程控制，请先将程序发布为当前操作系统应用程序");
}
//如果tomcat不存在，重新复制到app store文件夹
tomcatHomeDir = File.applicationStorageDirectory.resolvePath("tomcat");
if (!tomcatHomeDir.exists)
{
var tomcatOriginalDir:File = File.applicationDirectory.resolvePath("tomcat");
trace("Copying tomcat to appStorageDirectory...");
tomcatOriginalDir.copyTo(tomcatHomeDir);
var f:File;
f.openWithDefaultApplication()
}
tomcatHome.text = tomcatHomeDir.nativePath;
// 读取保存的配置（第一次运行以后生成）
var xml:XML = readConfig();
if (xml != null)
{
javaHome.text = xml.javaHome;
return;
}
// 如果第一次使用，设置默认Path
if (Capabilities.os.toLowerCase().indexOf("win") > -1)
{
// 默认的JAVA_HOME (windows)
javaHome.text = "C:\\Program Files\\Java\\jdk1.6.0";
}
else if (Capabilities.os.toLowerCase().indexOf("mac") > -1)
{
// 默认的JAVA_HOME (Mac)
javaHome.text = "/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0";
}
}
public function startTomcat():void
{
// 将本次的JAVA_HOMR写入配置文件
writeConfig();
log.text = "Starting Tomcat..." + File.lineEnding;
startTomcatProcess = new NativeProcess();
execute(startTomcatProcess, "start");
}
public function stopTomcat():void
{
log.text = "Stopping Tomcat..." + File.lineEnding;
stopTomcatProcess = new NativeProcess();
execute(startTomcatProcess, "stop");
}
public function execute(process:NativeProcess, arg:String):void
{
// 先获取JVM
var file:File = new File(javaHome.text);
if (Capabilities.os.toLowerCase().indexOf("win") > -1)
{
file = file.resolvePath("bin/javaw.exe");
}
else
{
file = file.resolvePath("Home/bin/java");
}
// 启动TOMCAT
try
{
var nativeProcessStartupInfo:NativeProcessStartupInfo = new NativeProcessStartupInfo();
nativeProcessStartupInfo.executable = file;
nativeProcessStartupInfo.workingDirectory = tomcatHomeDir.resolvePath("bin");
var processArgs:Vector.<String> = new Vector.<String>();
processArgs = "-Dcatalina.home="+tomcatHomeDir.nativePath;
processArgs = "-classpath";
processArgs = tomcatHomeDir.resolvePath("bin/bootstrap.jar").nativePath;
processArgs = "org.apache.catalina.startup.Bootstrap";
processArgs = arg;
nativeProcessStartupInfo.arguments = processArgs;
startTomcatProcess = new NativeProcess();
startTomcatProcess.start(nativeProcessStartupInfo);
startTomcatProcess.addEventListener(ProgressEvent.STANDARD_OUTPUT_DATA,
outputDataHandler);
startTomcatProcess.addEventListener(ProgressEvent.STANDARD_ERROR_DATA,
errorOutputDataHandler);
}
catch (e:Error)
{
Alert.show(e.message, "Error");
}
}
public function outputDataHandler(event:ProgressEvent):void
{
var process:NativeProcess = event.target as NativeProcess;
var data:String = process.standardOutput.readUTFBytes(process.standardOutput.bytesAvailable);
log.text += data;
}
public function errorOutputDataHandler(event:ProgressEvent):void
{
var process:NativeProcess = event.target as NativeProcess;
var data:String = process.standardError.readUTFBytes(startTomcatProcess.standardError.bytesAvailable);
log.text += data;
}
private function readConfig():XML
{
var file:File = File.applicationStorageDirectory.resolvePath("config.xml");
if (file.exists)
{
var fileStream:FileStream = new FileStream();
fileStream.open(file, FileMode.READ);
var xml:XML = XML(fileStream.readUTFBytes(fileStream.bytesAvailable));
fileStream.close();
return xml;
}
else
{
return null;
}
}
private function writeConfig():void
{
var xml:String = '<?xml version="1.0" encoding="utf-8"?>' + File.lineEnding;
xml += "<config>" + File.lineEnding;
xml += "<javaHome>" + javaHome.text + "</javaHome>" + File.lineEnding;
xml += "<tomcatHome>" + tomcatHome.text + "</tomcatHome>" + File.lineEnding;
xml += "</config>" + File.lineEnding;
var file:File = File.applicationStorageDirectory.resolvePath("config.xml");
var fileStream:FileStream = new FileStream();
fileStream.open(file, FileMode.WRITE);
fileStream.writeUTFBytes(xml);
fileStream.close();
}
]]>
</mx:Script>
<mx:RemoteObject id="srv" destination="contacts" endpoint="http://localhost:8080/messagebroker/amf" />
<mx:TabNavigator width="100%" height="100%">
<mx:VBox width="100%" height="100%" label="控制台" paddingLeft="8" paddingRight="8" paddingBottom="8">
<mx:Form width="100%">
<mx:FormItem label="Java Home" width="100%">
<mx:TextInput id="javaHome" width="100%"/>
</mx:FormItem>
<mx:FormItem label="Tomcat Home (嵌入的TOMCAT)" width="100%">
<mx:TextInput id="tomcatHome" width="100%" enabled="false"/>
</mx:FormItem>
</mx:Form>
<mx:HBox>
<mx:Button label="启动" click="startTomcat()"/>
<mx:Button label="停止" click="stopTomcat()"/>
<mx:Button label="清除信息" click="log.text=''"/>
</mx:HBox>
<mx:TextArea id="log" width="100%" height="100%"/>
</mx:VBox>
<mx:VBox label="嵌入的JSP实例" paddingLeft="8" paddingRight="8" paddingBottom="8">
<mx:HTML id="html" width="100%" height="100%"/>
<mx:Button label="读取JSP" click="html.location='http://localhost:8080'"/>
</mx:VBox>
<mx:VBox label="嵌入的RemoteObject实例" paddingLeft="8" paddingRight="8" paddingBottom="8">
<mx:DataGrid width="100%" height="100%" dataProvider="{srv.findAll.lastResult}">
<mx:columns>
<mx:DataGridColumn dataField="id" headerText="Id"/>
<mx:DataGridColumn dataField="firstName" headerText="First Name"/>
<mx:DataGridColumn dataField="lastName" headerText="Last Name"/>
<mx:DataGridColumn dataField="city" headerText="City"/>
</mx:columns>
</mx:DataGrid>
<mx:Button label="获取数据" click="srv.findAll()"/>
</mx:VBox>
</mx:TabNavigator>
</mx:WindowedApplication>
下载
源代码:
AIRAppWithEmbeddedTomcat.zip (653)
windows demo:
AIRAppWithEmbeddedTomcat.exe (542)
Mac Demo:
AIRAppWithEmbeddedTomcat.dmg (413)
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