Spring MVC + Velocity简单实例中遇到的疑问

Spring MVC + Velocity简单实例中遇到的疑问，直接贴代码，请GGJJ们解答一下

 

index.jsp

<form action="./loginAction.html" method="post">
	  	<table align="center" width="50%" border="0">
	  		<tr>
	  			<td>UserName:</td>
	  			<td>
	  				<input type="text" name="userName">
	  			</td>
	  		</tr>
	  		<tr>
	  			<td>PassWord:</td>
	  			<td>
	  				<input type="text" name="passWord">
	  			</td>
	  		</tr>
	  		<tr>
	  			<td colspan="2">
	  				<input type="submit"" value="提交">
	  			</td>
	  		</tr>
	  	</table>  		
  	</form>

 

Login.java

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;
	}

 

applicationContext.xml

<context:annotation-config></context:annotation-config>
	<!-- 在这个项目中为什么下面这个定义必须要？ -->
	<context:component-scan base-package="org.yonge"></context:component-scan>
	
	<!-- 配置velocity引擎 -->
	<bean id="velocityConfigurer"
		class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">
		<!-- 模板路径 -->
		<property name="resourceLoaderPath" value="WEB-INF/velocity/" />      
      	<property name= "velocityProperties">      
	        <props>      
	        	<prop key= "input.encoding">gbk</prop>      
            	<prop key= "output.encoding">gbk</prop>          
	        </props>      
      	</property> 
	</bean>

	<!-- 配置视图解析器 -->
	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.velocity.VelocityViewResolver">
		<property name="suffix" value=".vm" /><!-- 上面已经指定了模板路径，这里只需定义后缀 -->
		<property name="contentType" value="text/html;charset=gbk"></property> <!-- 设置编码格式 -->
	</bean>
	<bean id="login" class="org.yonge.model.Login"></bean>

 

LoginController.java

@Controller
public class LoginController {
	
	private Login login;
	
	public void setLogin(Login login) {
		this.login = login;
	}

//	@RequestMapping("/loginAction.html")
	public String method1(HttpServletRequest request, ModelMap modelMap, Login login)
	{
		System.out.println("userName:"+login.getUserName());
		System.out.println("passWord:"+login.getPassWord());
		modelMap.put("loginModel", login);
		return "ok";
	}
	
	@RequestMapping("/loginAction.html")
	public String method2(HttpServletRequest request, ModelMap modelMap)
	{
		System.out.println("userName param:"+request.getParameter("userName"));
		System.out.println("Login Object:"+login.toString());
		System.out.println("userName:"+login.getUserName());
		System.out.println("passWord:"+login.getPassWord());
		modelMap.put("loginModel", login);
		return "ok";
	}

}

 控制器中的method2方法中打印login.toString()是有值的，但是login.getUserName()和login.getPassWord()是没有值的，而method1方法中都可以正常打印值，为什么？注入的时候哪儿出问题了？