struts2 validate 不执行 ，为什么？
郁闷，写了个简单的测试用例，结果这个校验始终不执行 ，网上没有需找到答案，请大侠赐教
前台：login.jsp

  <s:fielderror></s:fielderror>
  <s:form action="Login" validate="true" method="post">
  <s:textfield label="用户名" name="username" />
  <s:textfield label="密码" name="password" />
  <s:submit value="登录" />
  </s:form>

action:LoginAction.java
package com.study.action;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{

private static final long serialVersionUID = 1L;

private String username;
private String password;

public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

public String execute() throws Exception {
System.out.println("execute() runing......");
if("hyq".equals(getUsername())&&"123".equals(getPassword())){
ActionContext.getContext().getSession().put("user", getUsername());

return "success";
}else{
return "error";
}
}
//增加校验但没有执行，为什么呢？  
public void validateExecute() {
System.out.println("validate() runing......");
if(getUsername()==null||"".equals(getUsername().trim())){
addFieldError("username","username is must!");
}
if(getPassword()==null||"".equals(getPassword().trim())){
addFieldError("password","password is must!");
}
}

}
struts.xml
<!DOCTYPE struts PUBLIC 
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<!-- Include webwork default (from the Struts JAR). -->
<include file="struts-default.xml"/>

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

<!-- Default interceptor stack. -->
<!-- <default-interceptor-ref name="paramsPrepareParamsStack"/>-->
<action name="Login" class="com.study.action.LoginAction">
<result name="input">/jsp/login.jsp</result>
<result name="success">/jsp/welcome.jsp</result>
<result name="error">/jsp/errors.jsp</result>
<!-- we don't need the full stack here -->
<interceptor-ref name="basicStack"/>
</action>
<action name="GetBooks" class="com.study.action.GetBooksAction" >
<result name="login">/jsp/login.jsp</result>
<result name="success">/jsp/showBook.jsp</result>
</action>

</package>
</struts>


------解决方案--------------------
<interceptor-ref name="basicStack"/>

楼主仔细看清楚，基础拦截器里面有没有使用到ValidationInteceptor。

把这个拦截器去掉，在把方法名换成validate就可以了。