java - 没有为命名空间 [/] 映射的操作和与上下文路径 [/TestStruts] 关联的操作名称 [Test]。 - [未知位置]

Question

我正在 NetBeans 7.2.1 中的 struts 2.3.16 上尝试我的第一个应用程序。输入 URL 时显示以下错误 - http://localhost:8080/TestStruts/Test.action(有一个 Test.jsp 页面)。

WARNING: Could not find action or result: /TestStruts/Test.action
There is no Action mapped for namespace [/] and action name [Test] associated with context path [/TestStruts]. - [unknown location]
    at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185)
    at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
    at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
    at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:552)
    at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)

Test.jsp 页面:

<s:form namespace="/TestStruts" action="test">
    <table border="0" class="">
            <tr>

                <td>
                    <s:textfield id="name" name="name" label="Enter your name"/>
                </td>
            </tr>
            <tr>
                <td>
                    <s:textfield id="email" name="email" label="Enter your email"/>
                </td>
            </tr>
            <tr>
                <td></td>
                <td><s:submit value="Submit"/></td>
            </tr>
    </table>            

</s:form>

Action 类:

package actions;
import com.opensymphony.xwork2.ActionSupport;

public final class TestAction extends ActionSupport
{
    private static final String SUCCESS = "success";
    private String name;
    private String email;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    @Override
    public String execute() throws Exception
    {
        System.out.println("name = "+name);
        System.out.println("email = "+email);
        return SUCCESS;
    }
}

strtus.xml 文件:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">


<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true" />
    <constant name="struts.custom.i18n.resources" value="myapp" />

    <package name="test" namespace="/TestStruts" extends="struts-default">
        <action name="test" class="actions.TestAction" method="execute">
            <result name="success">/Test.jsp</result>
        </action>
    </package>

</struts>

web.xml 文件:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/applicationContext.xml
        </param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

除了Spring的jar文件外，我还在类路径中添加了以下jar文件。

• commons-beanutils-1.8.0.jar
• commons-chain-1.2.jar
• commons-collections-3.1.jar
• commons-digester-2.0.jar
• commons-fileupload-1.3.jar
• commons-io-2.2.jar
• commons-lang3-3.1.jar
• commons-lang-2.4.jar
• commons-logging-1.1.3.jar
• commons-logging-api-1.1.jar
• commons-validator-1.3.1.jar
• freemarker-2.3.19.jar
• javassist-3.11.0.GA.jar
• ognl-3.0.6.jar
• struts2-core-2.3.16.jar
• struts2-spring-plugin-2.3.16.jar
• xwork-core-2.3.16.jar

---

当URL从.action变成.jsp时，比如http://localhost:8080/TestStruts/Test.jsp，它显示以下警告。

Dec 22, 2013 9:00:44 PM org.apache.struts2.components.ServletUrlRenderer warn
WARNING: No configuration found for the specified action: 'test' in namespace: '/TestStruts'. Form action defaulting to 'action' attribute's literal value.
Dec 22, 2013 9:00:45 PM org.apache.struts2.components.ServletUrlRenderer warn
WARNING: No configuration found for the specified action: 'test' in namespace: '/TestStruts'. Form action defaulting to 'action' attribute's literal value.

我错过了什么？

Answer 1

因为 /TestStruts 是部署应用程序的上下文路径。它与包中的 namespace 具有相同的路径。尝试

http://localhost:8080/TestStruts/TestStruts/test.action

当 URls 从 struts 标签呈现时，它试图找到相应的 Action 配置。如果没有找到配置，则会发出警告。