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  • SpringMVC快速入门

    第一讲:hello spring mvc

    5、hello spring案例

      步骤:

      a)  导入相关jar包

        

      b)  配置web.xml文件--配置分发器(视图分发器其实就是一个servlet,servlet怎么配你就怎么配)

    1  <servlet>
    2       <servlet-name>springmvc</servlet-name>
    3       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    4       <load-on-startup>1</load-on-startup>    <!-- 跟随服务器一起启动 -->
    5   </servlet>
    6   <servlet-mapping>
    7       <servlet-name>springmvc</servlet-name>
    8       <url-pattern>*.do</url-pattern>
    9   </servlet-mapping>

       c) 添加springmvc配置文件:默认在WEB-INF下添加  [DispatcerServlet Name]-servlet.xml文件(本次在D:java资料spring-framework-4.1.2.RELEASEdocsspring-framework-referencehtml进入到网页选V  17.3.1找到的)

    <?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">


    </beans>

       d) 编写HelloController.java(在Struts里面称为action,在springMVC里面称为controller,控制器)

     /01springmvc_hello/src/cn/sxt/controller/HelloController.java

    public class HelloController implements Controller{
        @Override
        public ModelAndView handleRequest(HttpServletRequest req,
                HttpServletResponse resp) 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配置文件(重头戏),刚才已经写了dispatcherServlet配置(web.xml里面,因为它就相当于一个servlet分发器,随服务器一起启动的)和controller(前端控制器)的配置

        还需要handler Mapping、handler Adapter、adapter

    <!--配置HandlerMapping Ctrl+T查找即可没必要记忆-->
        <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
    <!--配置HandlerAdapter -->
        <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
    <!-- 配置渲染器 -->
        <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
            <!-- 结果视图的前缀 -->
            <property name="prefix" value="/WEB-INF/jsp/"/>
            <!-- 结果视图的后缀 -->
            <property name="suffix" value=".jsp"/>    <!--  -->
        </bean>
        <!-- 配置请求和处理器 -->
        <bean name="/hello.do" class="cn.sxt.controller.HelloController"></bean>

      f)测试,

    把刚才的项目部署到tomcat上,用浏览器输入路径http://localhost:8080/hello/hello.do访问

     第二讲使用注解开发springmvc

    2.web.xml配置

    注意:方框内指明mvc的配置文件位置(src/mvc.xml)

    4、springmvc配置

    <!-- 配置渲染(解析)器 -->
        <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
            <!-- 结果视图的前缀 -->
            <property name="prefix" value="/WEB-INF/jsp/"/>
            <!-- 结果视图的后缀 -->
            <property name="suffix" value=".jsp"/>    <!--  -->
        </bean>
        <!-- 注解扫描,自动扫描这个包下面的注解 -->此处改用扫描了
        <context:component-scan base-package="cn.sxt.controller"></context:component-scan>

     把这个项目部署到tomcat上,用浏览器输入路径http://localhost:8080/annotation/hello.do访问

    或者后面写annotation/hello来访问,也可以访问到,这就是在mvc.xml文件里面配置的adapter的作用,如果把这个adapter的配置删除了,则后面必须hello.do才能访问到(要不然怎么叫适配器呢)

     

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  • 原文地址:https://www.cnblogs.com/djlindex/p/11291678.html
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