springMVC----springMVC的HelloWorld

搭建步骤

a.导入jar包

导入到spring4.0的所有jar包（虽然不是都有用的，但是我嫌麻烦就全导进来了）

b.配置web.xml----配置分发器

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--设置第一个启动-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

c.添加springmvc配置文件，默认在WEB-INF下配置[DispatcherServlet]-servlet.xml 文件

d.编写HelloController.java

    @Override
    public ModelAndView handleRequest(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws Exception {
        ModelAndView mv = new ModelAndView();
        //封装要显示到视图中的数据
        mv.addObject("msg","hello springMVC");
        //视图名
        mv.setViewName("hello");
        return mv;
    }

e.编写springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

    <!--配置handlerMapping-->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
    <!--配置handlerAdapter-->
    <bean class="org.springframework.web.portlet.mvc.SimpleControllerHandlerAdapter"></bean>
    <!--配置视图渲染器-->
    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
        <!--结果视图的前缀-->
        <property name="prefix" value="/WEB-INF/jsp"></property>
        <!--结果视图的后缀-->
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--如果没有配置adapter则需要将路径写完整，即／hello.do-->
    <bean id="/hello" class="cn.limbo.controller.HelloController" />

</beans>

f.测试