struts2.2.1使用validation.xml验证出错，不知道怎么回事？

struts2.2.1写了个小例子，不验证时正常运行，使用validation.xml验证出错，不知道怎么回事，请教大家支招：

TestAction.java
[code="java"]
package test;

import com.opensymphony.xwork2.ActionSupport;

public class TestAction extends ActionSupport {

private String name = null;

private int age = 0;

public String doInit(){
    return SUCCESS;
}

public String doSave(){
    System.out.println(name);
    System.out.println(age);
    return SUCCESS;
}

public String getName() {
    return name;
}

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

public int getAge() {
    return age;
}

public void setAge(int age) {
    this.age = age;
}

}

[/code]

test.jsp
[code="java"]
<%@ page contentType="text/html;charset=gb2312" language="java" %>
<%@ taglib prefix="s" uri="/struts-tags" %>

test
function doSave(){ document.forms[0].action="save.do"; document.forms[0].target = "_self"; document.forms[0].submit(); }

姓名：
年龄：

save
/s:form


[/code]

struts.xml
[code="java"]
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<!-- Include webwork default (from the Struts JAR). -->

<!-- Configuration for the default package. -->
<package name="default" extends="struts-default">

    <!-- Default interceptor stack. -->
    <action name="index" class="test.TestAction" method="init">
        <result name="input">/jsp/test.jsp</result>
        <result name="success">/jsp/test.jsp</result>
    </action>
    <action name="save" class="test.TestAction" method="save">
        <result name="input">/jsp/test.jsp</result>
        <result name="success">/jsp/test.jsp</result>
    </action>
</package>

[/code]

保存时出现如下错误：

java.lang.NoSuchMethodException: test.TestAction.save()
java.lang.Class.getMethod(Class.java:1605)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:161)

使用jar包如下：
commons-fileupload-1.2.1.jar
commons-io-1.3.2.jar
freemarker-2.3.16.jar
javassist-3.12.0.GA.jar
ognl-3.0.jar
struts2-core-2.2.1.jar
xwork-core-2.2.1.jar

工程参见附件。

    <action name="index" class="test.TestAction" method="doInit">  

    <action name="save" class="test.TestAction" method="doSave">  

document.forms[0].action="save.do?method=save";

试一下