JSF 2 和发布/重定向/获取? [英] JSF 2 and Post/Redirect/Get?

问题描述

如果我错了，请纠正我，但我想我所有的非 AJAX 提交都应该使用 Post/Redirect/Get (PRG) 方式，因为 GET 应该用于刷新/查询数据，并且就我而言，我能想到的应用程序页面实际上只是更新数据然后刷新页面，所以我认为 PRG 适合这里.

Please correct me if I'm wrong, but I'm thinking of all of my non-AJAX submits should use the Post/Redirect/Get (PRG) way, since GET should be used to refresh/query data, and in my case, the application pages I can think of really only do update on the data and then refresh the page, so I think PRG fits here.

我相信我可以使用faces-config.way来做到这一点，在那里我使用<redirect/>，或者我可以使用return "myview.xhtml?faces-redirect=true";

I believe I can do this using the faces-config.way, where I make use of the <redirect/>, or I can use the return "myview.xhtml?faces-redirect=true";

现在的问题是..

有没有什么办法可以全局配置，对于非AJAX调用/提交，自动使用faces-redirect=true，这样我的源就这么简单:

Is there any way I can configure this globally that for non-AJAX calls/submits, automatically make use of faces-redirect=true, so that my source is as simple as this:

return "myview";

推荐答案

您可以使用自定义 ConfigurableNavigationHandler.这是一个启动示例:

You could do this with a custom ConfigurableNavigationHandler. Here's a kickoff example:

package com.example;

import java.util.Map;
import java.util.Set;

import javax.faces.application.ConfigurableNavigationHandler;
import javax.faces.application.NavigationCase;
import javax.faces.application.NavigationHandler;
import javax.faces.context.FacesContext;

public class RedirectNavigationHandler extends ConfigurableNavigationHandler {

    private NavigationHandler parent;

    public RedirectNavigationHandler(NavigationHandler parent) {
        this.parent = parent;
    }

    @Override
    public void handleNavigation(FacesContext context, String from, String outcome) {
        if (!outcome.endsWith("?faces-redirect=true")) {
            outcome += "?faces-redirect=true";
        }

        parent.handleNavigation(context, from, outcome);        
    }

    @Override
    public NavigationCase getNavigationCase(FacesContext context, String fromAction, String outcome) {
        if (parent instanceof ConfigurableNavigationHandler) {
            return ((ConfigurableNavigationHandler) parent).getNavigationCase(context, fromAction, outcome);
        } else {
            return null;
        }
    }

    @Override
    public Map<String, Set<NavigationCase>> getNavigationCases() {
        if (parent instanceof ConfigurableNavigationHandler) {
            return ((ConfigurableNavigationHandler) parent).getNavigationCases();
        } else {
            return null;
        }
    }

}

在faces-config.xml中注册如下:

<application>
    <navigation-handler>com.example.RedirectNavigationHandler</navigation-handler>
</application>  

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