Redirect 如何重定向到JSF中的锚?
假设我在JSF管理的Bean中有这样一个操作:Redirect 如何重定向到JSF中的锚?,redirect,jsf-2,accessibility,anchor,Redirect,Jsf 2,Accessibility,Anchor,假设我在JSF管理的Bean中有这样一个操作: public String doSomething() { FacesContext.getCurrentInstance().getExternalContext().getFlash().put("msg", "Something was done successfully"); return "view?faces-redirect=true"; } 我的视图有一个id为msg的锚元素。我希望url具有此锚(用于可访问性问题
public String doSomething() {
FacesContext.getCurrentInstance().getExternalContext().getFlash().put("msg", "Something was done successfully");
return "view?faces-redirect=true";
}
我的视图
有一个id为msg
的锚元素。我希望url具有此锚(用于可访问性问题),如:
或者我的FacesServlet过滤模式
返回“view#msg?faces redirect=true”
显然不起作用,因为JSF(至少是mojarra)会尝试将view#msg
作为一个视图进行评估
因此,我的问题是如何使JSF最终重定向到带有#msg
的URL
因为JSF(至少是mojarra)会尝试将view#msg
作为一个视图进行评估
哦,真讨厌。这绝对值得JSF/Mojarra boys提出一个增强请求
最好是在的帮助下手动发送重定向
(假设FacesServlet
映射到*.xhtml
)
或者,您可以有条件地呈现一段JS,而这段JS会执行此操作
window.location.hash='msg';
您试图构建一个非法URL-片段(#
)始终是URL的最后一部分
return“view?faces redirect=true#msg”
将是正确的URL
不幸的是,至少在JSF2.2中,默认的NavigationHandler
剥离了该片段
虽然这两种选择也很有效,但我还有第三种选择。用小补丁包住NavigationHandler
和ViewHandler
:
public class MyViewHandler extends ViewHandlerWrapper {
public static final String REDIRECT_FRAGMENT_ATTRIBUTE = MyViewHandler.class.getSimpleName() + ".redirect.fragment";
// ... Constructor and getter snipped ...
public String getRedirectURL(final FacesContext context, final String viewId, final Map<String, List<String>> parameters, final boolean includeViewParams) {
final String redirectURL = super.getRedirectURL(context, viewId, removeNulls(parameters), includeViewParams);
final Object fragment = context.getAttributes().get(REDIRECT_FRAGMENT_ATTRIBUTE);
return fragment == null ? redirectURL : redirectURL + fragment;
}
}
public class MyNavigationHandler extends ConfigurableNavigationHandlerWrapper {
// ... Constructor and getter snipped ...
public void handleNavigation(final FacesContext context, final String fromAction, final String outcome) {
super.handleNavigation(context, fromAction,
storeFragment(context, outcome));
}
public void handleNavigation(final FacesContext context, final String fromAction, final String outcome, final String toFlowDocumentId) {
super.handleNavigation(context, fromAction,
storeFragment(context, outcome), toFlowDocumentId);
}
private static String storeFragment(final FacesContext context, final String outcome) {
if (outcome != null) {
final int hash = outcome.lastIndexOf('#');
if (hash >= 0 && hash + 1 < outcome.length() && outcome.charAt(hash + 1) != '{') {
context.getAttributes().put(MyViewHandler.REDIRECT_FRAGMENT_ATTRIBUTE, outcome.substring(hash));
return outcome.substring(0, hash);
}
}
return outcome;
}
}
公共类MyViewHandler扩展了ViewHandlerWrapper{
公共静态最终字符串重定向\u片段\u属性=MyViewHandler.class.getSimpleName()+“.REDIRECT.FRAGMENT”;
//…构造函数和getter被截断了。。。
公共字符串getRedirectURL(最终FacesContext上下文、最终字符串viewId、最终映射参数、最终布尔includeViewParams){
最终字符串redirectURL=super.getRedirectURL(上下文、视图ID、removeNulls(参数)、includeViewParams);
最终对象片段=context.getAttributes().get(重定向\u片段\u属性);
return fragment==null?redirectURL:redirectURL+fragment;
}
}
公共类MyNavigationHandler扩展ConfigurableNavigationHandlerWrapper{
//…构造函数和getter被截断了。。。
public void handleNavigation(最终面上下文上下文、操作的最终字符串、最终字符串结果){
超级掌上导航(上下文、fromAction、,
存储片段(上下文、结果);
}
public void handleNavigation(最终面上下文上下文、最终字符串fromAction、最终字符串output、最终字符串toFlowDocumentId){
超级掌上导航(上下文、fromAction、,
storeFragment(上下文、结果),toFlowDocumentId);
}
私有静态字符串storeFragment(最终FacesContext上下文,最终字符串结果){
如果(结果!=null){
final int hash=output.lastIndexOf('#');
if(hash>=0&&hash+1
(由于JAVASERVERFACES-3154的修复,我不得不为ViewHandler创建包装)这段JS考虑得不错。另外,
ExternalContext#redirect()
非常有效。再一次,一个很好的答案:)我想补充一点,如果你想跳转到同一页面上的锚,重定向重新加载,所以JS是更好的选择。别忘了把代码放在你想跳转到的元素后面。
public void doSomething() throws IOException {
ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
ec.getFlash().put("msg", "Something was done successfully");
ec.redirect("view.xhtml#msg");
}
public class MyViewHandler extends ViewHandlerWrapper {
public static final String REDIRECT_FRAGMENT_ATTRIBUTE = MyViewHandler.class.getSimpleName() + ".redirect.fragment";
// ... Constructor and getter snipped ...
public String getRedirectURL(final FacesContext context, final String viewId, final Map<String, List<String>> parameters, final boolean includeViewParams) {
final String redirectURL = super.getRedirectURL(context, viewId, removeNulls(parameters), includeViewParams);
final Object fragment = context.getAttributes().get(REDIRECT_FRAGMENT_ATTRIBUTE);
return fragment == null ? redirectURL : redirectURL + fragment;
}
}
public class MyNavigationHandler extends ConfigurableNavigationHandlerWrapper {
// ... Constructor and getter snipped ...
public void handleNavigation(final FacesContext context, final String fromAction, final String outcome) {
super.handleNavigation(context, fromAction,
storeFragment(context, outcome));
}
public void handleNavigation(final FacesContext context, final String fromAction, final String outcome, final String toFlowDocumentId) {
super.handleNavigation(context, fromAction,
storeFragment(context, outcome), toFlowDocumentId);
}
private static String storeFragment(final FacesContext context, final String outcome) {
if (outcome != null) {
final int hash = outcome.lastIndexOf('#');
if (hash >= 0 && hash + 1 < outcome.length() && outcome.charAt(hash + 1) != '{') {
context.getAttributes().put(MyViewHandler.REDIRECT_FRAGMENT_ATTRIBUTE, outcome.substring(hash));
return outcome.substring(0, hash);
}
}
return outcome;
}
}