我正在尝试在现有的大型 SEAM 项目中向用户添加信息消息。我已将 .xhtml 页面添加<h:messages/>
到 .xhtml 页面中,这些是我在调用类的代码中的尝试,AbstractChartController
但是当页面在操作后刷新时,不显示 FacesMessages,有人知道我接下来可以尝试什么吗?
if (axis.getAxisType() == AxisType.LOGARITHMIC && axis.getLowestValue() <= 0d){
//Non of this code works:
//Attempt 1
FacesMessages facesMessages = FacesMessages.instance();
facesMessages.add(FacesMessage.SEVERITY_INFO, "Note: Data contains values below or equal to zero so cannot be plotted on a logarithmic axis.");
//Attempt 2
FacesContext context = FacesContext.getCurrentInstance();
FacesMessage message = new FacesMessage("Test2");
context.addMessage(null, message);
//Attempt 3
org.jboss.seam.faces.FacesContext myContext = (org.jboss.seam.faces.FacesContext) Component.getInstance("FacesContext");
if (myContext != null) { //Why is this null in debug?
myContext.getContext().addMessage("Test3", message);
}
//Attempt 4:
//StatusMessages.instance()
//.add(StatusMessage.Severity.INFO, "Test4");
// (Compile time error above that it can't find StatusMessages class to import)
System.out.println("FacesMessage added");
...
编辑:“添加的面孔消息”显示在我的 Eclipse 控制台中,因此正在运行代码
我在想这个类由于某种原因不能访问 FacesContext?我在正确的轨道上吗?