spring至关重要的一环就是装配，即配置文件的编写，接下来我按刚才实际过程中一步步简单讲解。
首先，要在web.xml中配置DispatcherServlet，它是作为Spring MVC的前端控制器.必须在web.xml中配置好，如下
<
servlet
>
<servlet-name>ntx</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
实际上，spring的配置文件可以分切到多个xml文件，我们这个简单的示例就把它配置到ntx.xml中
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC
"-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans
default-autowire="no"
default-lazy-init="false"
default-dependency-check="none"
>
<bean id="loginService" class="ntx.service.serviceimpl.LoginServiceImpl"/>
<bean id="loginController" class="ntx.controller.LoginController">
<property name="loginService">
<ref bean="loginService"/>
</property>
<property name="gotoUrl">
<value>/showResult.jsp</value>
</property>
</bean>
<bean id="SimpleUrlHandlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/userLogin.do">loginController</prop>
</props>
</property>
</bean>
</beans>
配置好上面的这些后，要在WEB-INF下要建立ntx-servlet.xml如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property>
<property name="prefix"><value></value></property>
<property name="suffix"><value></value></property>
</bean>
</beans>
接下来，要指明哪些请求将交给spring的DispatcherServlet来处理，所以在web.xml中添加<servlet-mapping>
<servlet-mapping>
<servlet-name>ntx</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
为了能正确载入DispatcherServlet等配置文件，我们要在web.xml中配置一个上下文载入器ContextLoaderListener或者ContextLoaderServlet，我们这里为了兼容版本较低的Serlvet容器(实际上我采用的2.4)，采用第二种:
<servlet>
<servlet-name>context</servlet-name>
<servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class>
<load-on-startup>100</load-on-startup>
</servlet>
这样就全部配置完毕了，当然，上面的ntx.xml是我在项目完成以后才配置完成的，这里不再多讲，有bean元素的配置大家可以参考有关资料理解，很容易理解的，下面再给出完整的web.xml配置以及java
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/ntx.xml</param-value>
</context-param>
<servlet>
<servlet-name>ntx</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>context</servlet-name>
<servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class>
<load-on-startup>100</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>ntx</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
根据ntx.xml知道，总共有三个java文件,LoginController.java是控制器，继承了最简单的Controller(实际上spring有很多控制器供我们选择)，接下来是一个简单控制器的源码
package ntx.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import ntx.service.LoginService;
public class LoginController implements Controller...{
private LoginService loginService ;
private String gotoUrl;
public ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response) throws Exception ...{
String userName = request.getParameter("userName");
this.getUserInfo(request, userName);
return new ModelAndView(this.getGotoUrl());
}
private void getUserInfo(HttpServletRequest request,String userName)...{
String userInfo = loginService.getUserInfo(userName);
request.setAttribute("userInfo", userInfo);
}
public String getGotoUrl() ...{
return gotoUrl;
}
public void setGotoUrl(String gotoUrl) ...{
this.gotoUrl = gotoUrl;
}
public LoginService getLoginService() ...{
return loginService;
}
public void setLoginService(LoginService loginService) ...{
this.loginService = loginService;
}
}
还有service层的接口以及实现，较简单，
package ntx.service;
public interface LoginService ...{
public String getUserInfo(String userName);
}
package ntx.service.serviceimpl;
import ntx.service.LoginService;
public class LoginServiceImpl implements LoginService ...{
public String getUserInfo(String userName)...{
return "你的名字是:" + userName;
}
}
好了，最后是两个jsp文件，一个index.jsp用来显示一个表单，输入名字，一个showResult.jsp用来显示结果,只贴出相关的代码
<body>
This is my Test Spring page. <br>
<div>
<form method="post" action="/userLogin.do">
<input type="text" name="userName" size="30"/><br/>
<input type="submit" value="提交"/>
</form>
</div>
</body>
<body>
This is the Result: <br>
<c:out value="${userInfo}" default="没有结果"/>
</body>
发布到tomcat或者其它Servlet容器可以正常使用,提交以后将显示：
This is the Result:
你的名字是:gavin