[英]How to create conditions based on user role using JSF/MyFaces?
What options do I have to read the roles of the current user from my JSP pages? 我有哪些选项可以从JSP页面中读取当前用户的角色? I'm aware of the
visibleOnUserRole="myRole"
attribute on Tomahawk components, but I need roles for a bit more complicated things than simple visibility. 我知道Tomahawk组件上的
visibleOnUserRole="myRole"
属性,但我需要比简单可见性更复杂的角色。
The ExternalContext exposes user and role information. ExternalContext公开用户和角色信息。
public class RolesAccess implements Serializable {
public String getUserPrincipalName() {
FacesContext context = FacesContext.getCurrentInstance();
Principal principal = context.getExternalContext().getUserPrincipal();
if(principal == null) {
return null;
}
return principal.getName();
}
public String getUser() {
FacesContext context = FacesContext.getCurrentInstance();
return context.getExternalContext().getRemoteUser();
}
public boolean isManager() {
FacesContext context = FacesContext.getCurrentInstance();
return context.getExternalContext().isUserInRole("manager");
}
}
If you're using JSF in servlets, this information maps to the values exposed by the HttpServletRequest . 如果您在servlet中使用JSF,则此信息将映射到HttpServletRequest公开的值。
You can use managed beans to expose values to the view via the Expression Language . 您可以使用托管bean通过表达式语言向视图公开值。
<f:view>
<h:outputLabel value="#{rolesBean.userPrincipalName}" />
<h:outputLabel value="#{rolesBean.user}" />
<h:outputLabel value="#{rolesBean.manager}" />
</f:view>
In Java EE 6 (which wasn't available when this question was asked/answered), you can test roles directly from the request
variable in your Facelets code. 在Java EE 6中(在询问/回答此问题时不可用),您可以直接从Facelets代码中的
request
变量测试角色。 This is super-convenient. 这非常方便。
Eg 例如
<h:outputText value="hi, admin!" rendered="#{request.isUserInRole('Admin')}" />
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