struts2找不到action解决思路

struts2找不到action
看网上的教程搭建一个ssh框架，刚开始可以，但是我后来修改struts.xml文件后就提示HTTP Status 404 - There is no Action mapped for action name umshowUser.
web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>SSH Project</display-name>

    <filter>
        <filter-name>SSH</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>SSH</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

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

    <welcome-file-list>
        <welcome-file>userList.jsp</welcome-file>
    </welcome-file-list>

</web-app>

struts.xml文件在src下

<?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="um" extends="struts-default" namespace="/um"> 
		 <action name="um*"  method="{1}" class="com.hst.ssh.action.RegisterAction" >
		     <result name="userList" >/userList.jsp</result>
		     <result name="success" >/success.jsp</result>
		</action>
	</package>	
</struts>

applicationContext.xml文件 在web-inf/lib下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
     
    <!-- 定义数据源的信息 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
        destroy-method="close">
        <property name="driverClass">
            <value>oracle.jdbc.driver.OracleDriver</value>
        </property>
        <property name="jdbcUrl">
            <value>jdbc:oracle:thin:@10.152.89.65:1521:orcl</value>
        </property>
        <property name="user">
            <value>itiltest</value>
        </property>
        <property name="password">
            <value>itiltest123</value>
        </property>
        <property name="maxPoolSize">
            <value>80</value>
        </property>
        <property name="minPoolSize">
            <value>1</value>
        </property>
        <property name="initialPoolSize">
            <value>1</value>
        </property>
        <property name="maxIdleTime">
            <value>20</value>
        </property>
    </bean>

    <!--定义Hibernate的SessionFactory -->
    <!-- SessionFactory使用的数据源为上面的数据源 -->
    <!-- 指定了Hibernate的映射文件和配置信息 -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
        <property name="mappingResources">
            <list>
                <value>com/hst/ssh/beans/User.hbm.xml</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
                <prop key="show_sql">true</prop>
                <prop key="hibernate.jdbc.batch_size">20</prop>
                <prop key="hibernate.connection.autocommit">false</prop>
            </props>
        </property>
    </bean>

    <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <bean id="baseDao" class="com.hst.ssh.daoImpl.UserDao">
        <property name="sessionFactory">
            <ref bean="sessionFactory" />
        </property>
    </bean>

    <!--用户注册业务逻辑类 -->
    <bean id="userManager" class="com.hst.ssh.serviceImp.UserManagerImpl">
        <property name="dao">
            <ref bean="baseDao" />
        </property>
    </bean>

    <!-- 用户注册的Action -->
    <bean id="regAction" class="com.hst.ssh.action.RegisterAction">
        <property name="userManager">
            <ref bean="userManager" />
        </property>
        
    </bean>

    <!-- more bean definitions go here -->

</beans>

action文件

package com.hst.ssh.action;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;
import com.hst.ssh.forms.UserForm;
import com.hst.ssh.service.UserManager;

public class RegisterAction extends ActionSupport {

	private static final long serialVersionUID = 1L;

	private UserForm user;

	private UserManager userManager;
	
	private HttpServletRequest request;
	
	protected HttpServletRequest getRequest() {
        return ServletActionContext.getRequest();
    }
	

	public UserForm getUser() {
		return user;
	}

	public void setUser(UserForm user) {
		this.user = user;
	}

	public void setUserManager(UserManager userManager) {
		this.userManager = userManager;
	}

	public String execute() {
		try {
			this.userManager.regUser(user);
			return SUCCESS;

		} catch (Exception e) {
			e.printStackTrace();
			return ERROR;
		}
	}
	
	public String showUser(){
		List userList = this.userManager.showUserList("from T_USER_TEXT");
		this.getRequest().setAttribute("userList", userList);
		return "userList";
		
	}

}

而且现在输入http://localhost:8080/shtProject/register.action能够访问到这个页面
我现在struts.xml根本没有配置register的action为什么还能访问到以前配置的action呢
之前struts.xml配置如下

<?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>

	<include file="struts-default.xml" />
	<package name="ynwi" extends="struts-default">
		<action name="register" class="regAction">
			<result name="input">/Register.jsp</result>
			<result name="success">/Success.jsp</result>
			<result name="error">/Fail.jsp</result>
		</action>
	</package>

</struts>

------解决思路----------------------
在myeclipse中最上面有Project======>clean,清空一下项目，最好再重新部署一下，因为tomcat里面的内容可能没有更改过来