[英]Problem with c:forEach inside rich:dataTable
我有這個頁面:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns:ui="http://java.sun.com/jsf/facelets"
template="./templates/template.xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:rich="http://richfaces.org/rich"
xmlns:c="http://java.sun.com/jstl/core">
<ui:define name="main_title">AO MMS Messages</ui:define>
<ui:define name="main">
<rich:dataTable value="#{dataProviderBean.aoRequests}" var="item">
<f:facet name="noData">No messages are available.</f:facet>
<rich:column>
<f:facet name="header">Profile</f:facet>
#{item.profile.username}
</rich:column>
<rich:column>
<f:facet name="header">Timestamp</f:facet>
#{item.timestamp}
</rich:column>
<rich:column>
<f:facet name="header">Recipient</f:facet>
#{item.recipient}
</rich:column>
<rich:column>
<f:facet name="header">Sender</f:facet>
#{item.sender}
</rich:column>
<rich:column>
<f:facet name="header">Text</f:facet>
<h:outputText value="Contents: #{item.getContentByStringType('text/plain')}" />
<c:forEach var="content" items="#{item.getContentByStringType('text/plain')}">
<h:outputText value="Content: #{content}" />
</c:forEach>
</rich:column>
<rich:column>
<f:facet name="header">Headers</f:facet>
#{item.headers}
</rich:column>
</rich:dataTable>
</ui:define>
</ui:composition>
但是Text
列只打印:
Contents: [TextContent [content=Hello World in MMS]] Content:
為什么它不遍歷列表?
請求課程以獲取更多信息:
public class Request {
private Profile profile;
private Map<String, String> headers;
private Date timestamp;
private MessageType messageType;
private Map<String, ArrayList<Content>> contents;
public Request(MessageType messageType) {
this.messageType = messageType;
this.timestamp = new Date();
}
public Profile getProfile() {
return profile;
}
public void setProfile(Profile profile) {
this.profile = profile;
}
public Map<String, String> getHeaders() {
return headers;
}
public void setHeaders(Map<String, String> headers) {
this.headers = headers;
}
public Date getTimestamp() {
return timestamp;
}
public void setTimestamp(Date timestamp) {
this.timestamp = timestamp;
}
public MessageType getMessageType() {
return messageType;
}
public void setMessageType(MessageType messageType) {
this.messageType = messageType;
}
public Map<String, ArrayList<Content>> getContents() {
return contents;
}
public void setContents(Map<String, ArrayList<Content>> contents) {
this.contents = contents;
}
public List<Content> getContentByStringType(String type) {
return contents.get(type);
}
public String getSender() {
return headers.get(HttpHeaders.X_NOKIA_MMSC_FROM.getValue()).replaceAll("/.*", "");
}
public String getRecipient() {
return headers.get(HttpHeaders.X_NOKIA_MMSC_TO.getValue()).replaceAll("/.*", "");
}
@Override
public String toString() {
return "Request [profile=" + profile + ", headers=" + headers + ", timestamp=" + timestamp
+ ", messageType=" + messageType + ", contents=" + contents + "]";
}
}
在這種情況下使用ui:repeat
而不是c:forEach
。
c:forEach
在這里不起作用,因為您試圖引用未定義的 var item
( c:forEach
是一個TagHandler
因此它在構建樹時嘗試評估item
; rich:dataTable
是一個組件,它定義了僅在渲染響應中使用 var item
)。
有關此事的更多信息,您可以閱讀以下文章:。 TagHandler 與組件
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