SpringMVC入门案例，流程解析

2023-11-11 09:25:22

1.SpringMVC执行流程图

2.相关代码

web.xml 前端控制器配置

<!-- 前端控制器 -->
 <servlet>
   <servlet-name>dispatcherServlet</servlet-name>
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 
  <!--启动服务器时，加载springMVC.XML配置文件-->
   <init-param>
     <param-name>contextConfigLocation</param-name>
     <param-value>classpath:springMVC.xml</param-value>
   </init-param>
   
   <!-- 配置：load-on-startup 表示启动服务就创建DispatcherServlet对象
        不配置则第一次被访问时才创建DispatcherSerlet对象-->
   <load-on-startup>1</load-on-startup>
 </servlet>

 <!--拦截所有请求-->
 <servlet-mapping>
   <servlet-name>dispatcherServlet</servlet-name>
   <url-pattern>/</url-pattern>
 </servlet-mapping>

2.SpringMVC配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation=" http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd ">
    <!-- 注解，包扫描 -->
    <context:component-scan base-package="com.joyTop"></context:component-scan>
    <!--视图解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
        <!-- 文件的前缀-->
        <property name="prefix" value="/WEB-INF/pages/" />
        <!-- 文件的后缀名-->
        <property name="suffix" value=".jsp" />
     </bean>
    <!-- 开启SpringMVC框架注解的支持-->
    <mvc:annotation-driven />
</beans>

3.contrller 控制层

@Controller
public class HelloController {
    @RequestMapping(path = "/holle")
    public String sayHello() {
        System.out.println("Hell StringMVC 2020.3.8");
        return "success";
    }
}

4.index.jsp

<body>
    <h3>springMVC入门程序</h3>
    <a href="holle">入门程序</a>
</body>

5 success.jsp

<body>
    <h1>入门成功</h1>
</body>

码农公寓

1.SpringMVC执行流程图

2.相关代码

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