如何发送ListDataTable所在的特定行的当前javax.mail.Message返回到支持bean以获取某些内容该特定消息实例的头信息?我认为问题在于这是来自客户端dataTable中的。facelet dataTable:在backing bean中找不到方法,试图将实例发送回bean
如何让ListUrl对getUrl可用?
我已经试过:
<h:outputText value="#{messageBean.foo(m.header("Archived-at"))}"></h:outputText>
返回的错误:
Element type "h:outputText" must be followed by either attribute specifications, ">" or "/>".
我认为这是沿着command link,这表明的语法线的东西:
<h:commandLink action="#{bean.insert(item.id)}" value="insert" />
这与我正在做的事情很接近。在我的情况下,我只想将特定的消息发送回MessageBean.getUrl(Message),但它并不像我期望的那样工作。
我也试过:
/foo/client.xhtml @48,61 value="#{messageBean.url(m)}": Method url not found
因此,这显然不是从模板客户端发送一个对象来支持bean的正确方法。但是,我希望将实际的Message实例发送回bean。
被Facelets 2.0客户端:
<?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="./template.xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:f="http://java.sun.com/jsf/core">
<ui:define name="content">
<h:dataTable value="#{messageBean.model}" var="m">
<h:column>
<f:facet name="subject">
<h:outputText value="subject" />
</f:facet>
<h:outputText value="#{m.subject}"></h:outputText>
</h:column>
<h:column>
<f:facet name="content">
<h:outputText value="content" />
</f:facet>
<h:outputText value="#{m.sentDate}"></h:outputText>
</h:column>
<h:column>
<f:facet name="date">
<h:outputText value="date" />
</f:facet>
<h:outputText value="#{m.sentDate}"></h:outputText>
</h:column>
</h:dataTable>
</ui:define>
</ui:composition>
支持bean:
package net.bounceme.dur.nntp;
import java.io.Serializable;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.enterprise.context.SessionScoped;
import javax.faces.model.DataModel;
import javax.faces.model.ListDataModel;
import javax.inject.Named;
import javax.mail.Header;
import javax.mail.Message;
@Named
@SessionScoped
public class MessageBean implements Serializable {
private static final long serialVersionUID = 1L;
private static final Logger logger = Logger.getLogger(MessageBean.class.getName());
private static Level level = Level.INFO;
public MessageBean() {
logger.log(level, "MessageBean..");
}
public DataModel getModel() throws Exception {
logger.log(level, "MessageBean.getModel..");
List<Message> messages = new ArrayList<Message>();
SingletonNNTP nntp = SingletonNNTP.INSTANCE;
messages = nntp.getMessages();
DataModel messagesDataModel = new ListDataModel(messages);
return messagesDataModel;
}
public List<String> getStringHeaders(Message message) throws Exception {
List<Header> headerListOfHeaders = getHeaders(message);
List<String> stringListOfHeaders = new ArrayList<String>();
for (Header h : headerListOfHeaders) {
stringListOfHeaders.add(h.getName() + " " + h.getValue() + "\n");
}
return stringListOfHeaders;
}
public URL getUrl(Message message) throws Exception {
List<Header> headers = getHeaders(message);
URL url = new URL("http://www.google.com/");
for (Header h : headers) {
if ("Archived-at".equals(h.getName())) {
String s = h.getValue();
s = s.substring(1, s.length() - 1);
url = new URL(s);
}
}
return url;
}
private List<Header> getHeaders(Message message) throws Exception {
Enumeration allHeaders = message.getAllHeaders();
List<Header> headers = new ArrayList<Header>();
while (allHeaders.hasMoreElements()) {
Header hdr = (Header) allHeaders.nextElement();
headers.add(hdr);
}
return headers;
}
}
我想保持的getURL与MessageBean,但我愿意打破这种方法到另一个类。但是,哪一类,以及如何参考呢?只是像MyBeanOps什么的?
您没有使用JSP或Servlet。您正在使用JSF和Facelets。请不要在问题上输入错误的标签。 – BalusC 2012-04-06 04:28:20