应该返回带有html代码的字符串的bean属性返回空字符串 [英] Backing bean property that should return a string with html code returns empty string
问题描述
public String getHtmlPrevisualizar（）{
返回< html>< head>< title>< / title>< / head>< body> Hello world。< / body>< / html>;
}
我想要做的是在iframe中显示这个html代码。我用javascript做到这一点。这是xhtml页面：
<！DOCTYPE html PUBLIC - // W3C // DTD XHTML 1.0 Transitional // EN http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">
xmlns：h =http://java.sun.com/jsf/html
xmlns：a4j =http://richfaces.org/a4j
xmlns：rich =http://richfaces.org/rich
xmlns：f =http：// java。 sun.com/jsf/core
xmlns：ui =http://java.sun.com/jsf/facelets>
< title>＃{msg ['pageTitle']}< / title>
< / head>
< body>
< ui：define name =javascript>
< script type =text / javascript>
function showPreview（）{
var doc = document.getElementById（'iframePreview'）。contentWindow.document;
doc.open（）;
doc.write（'＃{nuevoEditarEstructura.htmlPrevisualizar}'）;
doc.close（）;
返回false;
}
function showPreview2（）{
var doc = document.getElementById（'iframePreview'）。contentWindow.document;
doc.open（）;
doc.write（'< html>< head>< title>< / title>< / head>< body> Hello world。< / body>< / html>'） ;
doc.close（）;
返回false;
}
< / script>
< / ui：define>
< ui：define name =content>
< h：form>
< a4j：commandLink value =预览styleClass =botononclick =showPreview（）;/>
< a4j：commandLink value =Preview2styleClass =botononclick =showPreview2（）;/>
< br />
< br />
< h：outputText value =＃{nuevoEditarEstructura.htmlPrevisualizar}/>
< br />
< br />
＃{nuevoEditarEstructura.htmlPrevisualizar}
< br />
< br />
< / h：表格>
< iframe id =iframePreview>
< / iframe>
< / ui：define>
< / ui：composition>
< / body>
< / html>
有两个commandLinks。第一个从backing bean获取html代码，第二个在javascript中使用字符串编写html代码。第一个commandLink不起作用。如果我查看页面的源代码，则应该从backing bean返回的值为空。
我已经打印了支持bean中属性的值还有：
< h：outputText value =＃{nuevoEditarEstructura.htmlPrevisualizar}/>
< br />
< br />
＃{nuevoEditarEstructura.htmlPrevisualizar}
但显示nothig。我已经调用了 getHtmlPrevisualizar（）并在eclipse控制台中打印了它的内容，并且它返回了正确的html代码。
我知道转义字符和facelets可能存在一些问题，我期望不得不处理html中被转义的字符，但我什么都没有。
好吧，这很尴尬。问题是支持bean名称拼写错误，没有别的。我希望我们能够得到这样的警告，而不是一味地失败。
I have a property in my backing bean that returns html code:
public String getHtmlPrevisualizar() {
return "<html><head><title></title></head><body>Hello world.</body></html>";
}
What I want to do is show this html code in a iframe. I do this with javascript. This is the xhtml page:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:rich="http://richfaces.org/rich"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<f:loadBundle basename="resources" var="msg" />
<head>
<title>#{msg['pageTitle']}</title>
</head>
<body>
<ui:composition template="/WEB-INF/facelets/templates/sqa/plantilla.xhtml">
<ui:define name="title">#{msg['pageTitle']}</ui:define>
<ui:define name="javascript">
<script type="text/javascript">
function showPreview() {
var doc = document.getElementById('iframePreview').contentWindow.document;
doc.open();
doc.write('#{nuevoEditarEstructura.htmlPrevisualizar}');
doc.close();
return false;
}
function showPreview2() {
var doc = document.getElementById('iframePreview').contentWindow.document;
doc.open();
doc.write('<html><head><title></title></head><body>Hello world.</body></html>');
doc.close();
return false;
}
</script>
</ui:define>
<ui:define name="content">
<h:form>
<a4j:commandLink value="Preview" styleClass="boton" onclick="showPreview();"/>
<a4j:commandLink value="Preview2" styleClass="boton" onclick="showPreview2();"/>
<br/>
<br/>
<h:outputText value="#{nuevoEditarEstructura.htmlPrevisualizar}" />
<br/>
<br/>
#{nuevoEditarEstructura.htmlPrevisualizar}
<br/>
<br/>
</h:form>
<iframe id="iframePreview">
</iframe>
</ui:define>
</ui:composition>
</body>
</html>
There are two commandLinks. The first one gets the html code from the backing bean, the second one has the html code written in a string in javascript. The first commandLink doesn't work. If I view the source code of the page, the value thas should have returned from the backing bean is empty.
I have printed the value from the property in the backing bean also with this:
<h:outputText value="#{nuevoEditarEstructura.htmlPrevisualizar}" />
<br/>
<br/>
#{nuevoEditarEstructura.htmlPrevisualizar}
But nothig is shown. I have called getHtmlPrevisualizar() and printed its content in the eclipse console, and it returns the right html code.
I know that there can be some problems with escaped characters and facelets, I was expecting to have to deal with the characters in the html being escaped, but I don't get anything.
Well, this is embarrassing. The problem was that the backing bean name was misspelled, nothing else. I wish that we could get some kind of warning for this, instead of just silently fail.
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