java - Strust 2.15 如何覆盖 TextProviderSupport 以自定义资源包消息

Question

在 struts 2.3 中，要覆盖我们在下面使用的 TextProvider

在 struts.xml 中设置 bean:

<bean type="com.opensymphony.xwork2.TextProvider" name="DefaultTextProvider" class="util.CustomTextProvider" scope="default" />

并制作CustomTextProvider

public class CustomTextProvider extends DefaultTextProvider{

public String getText(String key, String defaultValue, List<?> args) {
        String text = super.getText(key, defaultValue, args);
        //Do something with the text
        //and return it
    }

 //other getText methods can be override too
}

---

这似乎不适用于 Struts 2.15.2。

当我放置一些断点时，我的方法都没有被调用，似乎我的 bean 没有注册。

我认为 StrutsLocalizedTextProvider 可能是要覆盖的那个。但似乎我无法定义扩展它的 bean。 我收到此错误:

Unable to load configuration. - bean - file:/E:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/WEB-INF/classes/struts.xml:12:156
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
    at org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:960)
    at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:466)
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:499)
    at org.apache.struts2.dispatcher.InitOperations.initDispatcher(InitOperations.java:75)
    at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:63)
    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:285)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:266)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4590)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5233)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:748)
Caused by: Unable to load bean: type:com.opensymphony.xwork2.LocalizedTextProvider class:utils.CustomLocalizedTextProvider - bean - file:/E:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/WEB-INF/classes/struts.xml:12:156
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:271)
    at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:98)
    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:164)
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:63)
    ... 17 more
Caused by: Bean type interface com.opensymphony.xwork2.LocalizedTextProvider with the name struts has already been loaded by [unknown location] - bean - file:/E:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/WEB-INF/classes/struts.xml:12:156

你能告诉我如何处理它吗？!

Answer 1

Caused by: Bean type interface com.opensymphony.xwork2.LocalizedTextProvider with the name struts has already been loaded

您不应该使用相同的接口(interface)加载一个 bean 两次。如果你想获得容器加载的 bean 实例，你应该使用 DI。由于 DI 没有文档并且不受 Struts 支持，因此我不建议您使用它。

---

如果您需要自定义文本提供程序，您可以创建自己的文本提供程序，如 this 中所述。回答。

You could create your own text provider and register it in struts.xml:

<constant name="struts.xworkTextProvider" value="util.CustomTextProvider"/>