网页向flex传参数方法及要点

来源：互联网发布：java equals hashcode 编辑：程序博客网时间：2024/05/02 02:08

网上能查到很多类似资料，但完整性不敢恭维。以下是解决方案及要点：

方法一：通过url的方式向flex传参数

第1步：在网页中设置一个链接，如 <a href="test.jsp?p1=test1&p2=test2">测试链接一</a>，其中test.jsp嵌入了flash

第2步：获取参数

var params:Object=URLUtil.parseUrlParameters(ExternalInterface.call("window.location.search.substring", 1));
var param1:String=params["p1"];

parseUrlParameters是一个简单的分析url参数的方法，以下是方法体：

public static function parseUrlParameters(query:String):Object{
     var params:Object = {};
     if(query) {
                var pairs:Array = query.split("&");
                for(var i:uint=0; i < pairs.length; i++) {
                    var pos:int = pairs[i].indexOf("=");
                    //Alert.show(String(pos));
                    if(pos != -1) {
                        var argname:String = pairs[i].substring(0, pos);
                        var value:String = pairs[i].substring(pos+1);
                        params[argname] = value;
                    }
                }
            }
            return params;
  }

注：如果window.location.search.substring换成window.location.href.toString 则可获取完整的url

方法二：通过flashvar

第1步：修改index.template.html,在其中加入下面代码红色分，

要点：

1.四处所加内容一般完全相同，因为要考虑到跨浏览器问题，

2、 FlashVars这个名称不能变化

3.FlashVars的值可以是动态获取的，可以是变量，即下例中”233232332232323“可用变量代替或者是“sessionId=233232332232323”整个都可以用变量代替

<body scroll="no">
<script language="JavaScript" type="text/javascript">
<!--
// Version check for the Flash Player that has the ability to start Player Product Install (6.0r65)
var hasProductInstall = DetectFlashVer(6, 0, 65);

// Version check based upon the values defined in globals
var hasRequestedVersion = DetectFlashVer(requiredMajorVersion, requiredMinorVersion, requiredRevision);

if ( hasProductInstall && !hasRequestedVersion ) {
// DO NOT MODIFY THE FOLLOWING FOUR LINES
// Location visited after installation is complete if installation is required
var MMPlayerType = (isIE == true) ? "ActiveX" : "PlugIn";
var MMredirectURL = window.location;
document.title = document.title.slice(0, 47) + " - Flash Player Installation";
var MMdoctitle = document.title;

AC_FL_RunContent(
  "src", "playerProductInstall",
  "FlashVars", "MMredirectURL="+MMredirectURL+'&MMplayerType='+MMPlayerType+'&MMdoctitle='+MMdoctitle+"",
  "width", "${width}",
  "height", "${height}",
  "align", "middle",
  "id", "${application}",
  "quality", "high",
  "bgcolor", "${bgcolor}",
  "wmode","transparent", //透明背景
  "name", "${application}",
  "allowScriptAccess","sameDomain",
  "type", "application/x-shockwave-flash",
  "pluginspage", "http://www.adobe.com/go/getflashplayer" ,

"FlashVars", "sessionId=233232332232323"

);

} else if (hasRequestedVersion) {
// if we've detected an acceptable version
// embed the Flash Content SWF when all tests are passed
AC_FL_RunContent(
   "src", "${swf}",
   "width", "${width}",
   "height", "${height}",
   "align", "middle",
   "id", "${application}",
   "quality", "high",
   "bgcolor", "${bgcolor}",
   "wmode","transparent", //透明背景
   "name", "${application}",
   "allowScriptAccess","sameDomain",
   "type", "application/x-shockwave-flash",
   "pluginspage", "http://www.adobe.com/go/getflashplayer",
   "FlashVars", "sessionId=233232332232323"
);
} else { // flash is too old or we can't detect the plugin
    var alternateContent = 'Alternate HTML content should be placed here. '
+ 'This content requires the Adobe Flash Player. '
   + '<a href=http://www.adobe.com/go/getflash/>Get Flash</a>';
    document.write(alternateContent); // insert non-flash content
}
// -->
</script>
<noscript>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
   id="${application}" width="${width}" height="${height}"
   codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab">
   <param name="movie" value="${swf}.swf" />
   <param name="quality" value="high" />
   <param name="bgcolor" value="${bgcolor}" />
   <param name="allowScriptAccess" value="sameDomain" />
   <param name="FlashVars" value="sessionId=233232332232323" />
   <param name='wmode' value="transparent">
   <embed src="${swf}.swf" quality="high" bgcolor="${bgcolor}"
    width="${width}" height="${height}" name="${application}" align="middle"
    play="true"
    loop="false"
    quality="high"
    allowScriptAccess="sameDomain"
    type="application/x-shockwave-flash"
    FlashVars="sessionId=233232332232323"
    pluginspage="http://www.adobe.com/go/getflashplayer" wmode="transparent">
   </embed>
</object>
</noscript>
</body>

第2步：在flex中获取参数

用以下几种方法都可以：

要点：

1.parameters后的"sessionId" 必须与上面传过来的参数名字一致

2.parameters得到的传入参数的集合，是个Object，key为传入的参数名，所以可以通过object[key]来获取参数的值

trace(Application.application.parameters.sessionId;//parameters后的sessionId 这个单词必须与上面传过来的参数名字一致
trace(Application.application.parameters["sessionId"]);//也可以获取
trace(this.parameters.sessionId);//也可以获取
trace(this.loaderInfo.parameters.sessionId);//也可以获取