收到错误消息“没有为名称空间/和操作名称LoginAction映射任何操作".在struts2 [英] getting error "There is no Action mapped for namespace / and action name LoginAction" in struts2
问题描述
我的struts.xml在'src'下，而动作类在程序包'login'中.
My struts.xml is under 'src' and action class is in a package 'login'.
这是我的struts.xml:
Here's my struts.xml:
<?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>
<package name="example" extends="json-default">
<action name="login" class="login.LoginAction">
<result type="json"/>
</action>
</package>
</struts>
我的jsp(位于/LoginEx/WebContent/Login.jsp下):
My jsp(It is under /LoginEx/WebContent/Login.jsp):
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<%@ taglib prefix="s" uri="/struts-tags" %>
</head>
<body>
<s:form action="login.action" method="post" validate="true">
<s:textfield label="User Id" name="userId"></s:textfield>
<s:password name="password" label="Password"></s:password>
<s:submit value="Login"></s:submit>
</s:form>
</body>
</html>
动作类中的execute方法:
The execute method in the action class:
public String execute(){
JSONObject json = new JSONObject();
json.put("success", "true");
return Action.SUCCESS;
}
当我尝试运行appn时，出现错误没有为名称空间/和操作名登录映射的操作". 有人可以帮我在这里吗.我在做什么错了?
When I try to run the appn, I get the error "There is no Action mapped for namespace / and action name login". Could some1 plz help me out here. What am I doing wrong?
这是堆栈跟踪: 这是堆栈跟踪:
Here's the stack trace: Here's the stack trace:
WARNING: Could not find action or result
There is no Action mapped for namespace / and action name login. - [unknown location]
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:189)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:434)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
推荐答案
好，请找出原因.我得到一个warning: Unable to find parent packages json-default是因为我刚刚在lib中添加了json-lib-2.2.2-jdk15.jar，但我不知道还要添加jsonplugin-0.32.jar.
我现在也将动作类的json对象返回为json.toString()
感谢您的评论.
ok ppl, I found out why I was getting this error. I was getting a warning: Unable to find parent packages json-default because I had just added the json-lib-2.2.2-jdk15.jar in lib and I didn't know that jsonplugin-0.32.jar was to be added as well.
I'm also now returning the json object from the action class as json.toString()
Thanks for the comments.
这篇关于收到错误消息“没有为名称空间/和操作名称LoginAction映射任何操作".在struts2的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
