spring怎么注入失败呢？求解
web.xml文件:
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:spring/*.xml</param-value>
</context-param>

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

配置：

XML code

<bean id="userDao" class="cc.user.dao.UserDAO">
    </bean>
    
    <bean id="userBo" class="cc.user.bo.UserBo"></bean>
    
    <bean id="userService" class="cc.user.service.impl.UserServiceImpl">
        <property name="userDao" ref="userDao"></property>
    </bean>
    
    <bean id="userAction" class="cc.user.action.UserAction">
        <property name="userService" ref="userService"></property>
        <property name="userBo" ref="userBo"></property>
    </bean>

java文件：

Java code

public class UserAction extends ActionSupport{
    UserBo userBo; 
    UserService userService;
    String result="";
    /**
     * 验证用户登录
     * @return
     */
    public String checkUser(){
        String i=userService.checkUser(userBo);
        result=i;
        return SUCCESS;
    }
    @JSON(serialize=false)
    public UserBo getUserBo() {
        return userBo;
    }
    public void setUserBo(UserBo userBo) {
        this.userBo = userBo;
    }
    @JSON(serialize=false)
    public UserService getUserService() {
        return userService;
    }
    public void setUserService(UserService userService) {
        this.userService = userService;
    }

    public String getResult() {
        return result;
    }

    public void setResult(String result) {
        this.result = result;
    }
    
}

谢谢大家帮忙，看看小弟那里配错了，只有User userservice =new UserService 才能用，也不报错，控制台打印：[color=#FF0000][/color]
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.config.ConfigurationManager - Checking ConfigurationProviders for reload.
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler - Entering nullPropertyValue [target=[com.opensymphony.xwork2.DefaultTextProvider@12a73d9], property=struts]
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.config.ConfigurationManager - Checking ConfigurationProviders for reload.
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler - Entering nullPropertyValue [target=[com.opensymphony.xwork2.DefaultTextProvider@12a73d9], property=struts]
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.config.ConfigurationManager - Checking ConfigurationProviders for reload.
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.DefaultActionProxy - Creating an DefaultActionProxy for namespace /user and action name check
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.interceptor.I18nInterceptor - intercept '/user/check' { 
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.interceptor.I18nInterceptor - applied invocation context locale=zh_CN
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.interceptor.I18nInterceptor - before Locale=zh_CN
69047 [http-8080-1] DEBUG com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler - Entering nullPropertyValue [target=[cc.user.action.UserAction@ec898a, com.opensymphony.xwork2.DefaultTextProvider@12a73d9], property=st