JSF如何强制硬重装当前页面 [英] JSF how to force hard reload of current page

问题描述

我使用JSF 1.2.我有一个视图，其中有一个h:commandButton，它具有以下操作:

I use JSF 1.2. I have a view in which I have a h:commandButton with the following action:

#{myBean.saveSomeData}

当我单击按钮时，我想保存一些数据，就像保存的数据可以改变视图的显示一样，我想强制重新加载(例如在浏览器中按CTRL + F5)页面上的内容.

When I click on the button, I want to save some data and like the data that are saved can change the display of my view, i would like to force hard reload (like a CTRL+F5 in my browser for example) of my page.

为此，我想到了这段代码:

To do that, I thought to this code :

public void saveSomeData() {
            ... Save some data ... 

        FacesContext context = FacesContext.getCurrentInstance();
        String viewId = context.getViewRoot().getViewId();
        ViewHandler handler = context.getApplication().getViewHandler();
        UIViewRoot root = handler.createView(context, viewId);
        root.setViewId(viewId);
        context.setViewRoot(root);
}

但是当我这样做时，视图的树组件不会重新加载.

But when i do that, the tree components of my view is not reloaded.

所以，我不知道该如何重新加载.有人会对这样做的方式有任何想法吗?

So, I don't know how to do that reload. Someone would have any idea about the way to do that ?

在此先感谢您的帮助.

西尔万.

推荐答案

在响应中添加无缓存标头，以使浏览器从不缓存页面.您可以使用Filter来做到这一点，该Filter映射在目标url模式上.例如*.jsf或仅在FacesServlet上.让Filter在doFilter()方法中设置以下标头:

Add no-cache headers to the response so that the browser never caches the page. You can do this with a Filter which is mapped on the url-pattern of interest. For example *.jsf or just on the FacesServlet. Let the Filter set the following headers in the doFilter() method:

response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
response.setDateHeader("Expires", 0); // Proxies.

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