springMVC认识（一）

先来看看springMVC流程图：

优点百度....

向工程中添加jar包：

工程wed.xml配置：

<!-- 配置SpringMVC springDispatcherServlet-->
    <servlet>
        <servlet-name>springDispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 配置springDispatcherServlet的初始化参数：配置SpringMVC配置文件的位置名称-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!-- 加载创建-->
        <load-on-startup>1</load-on-startup>
    </servlet>
<!-- 拦截的url -->
    <servlet-mapping>
        <servlet-name>springDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

创建SpringMVC配置文件设置视图解析器

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    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-4.3.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
    <!-- 配置扫描包:带有spring特殊注解并赋予相应的功能 -->
    <context:component-scan base-package="chen"></context:component-scan>
    <!-- 配置视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

创建控制器以及url映射

@Controller
public class HelloWorld {
    
    /**
     *1 使用@RequestMapping注解映射url
     *2 返回值通过视图解析器解析为实际的物理视图
     *    InternalResourceViewResolver
     *    prefixֵ值+返回值+suffixֵ值= /WEB-INF/views/one.jsp 然后转发
     * */
    @RequestMapping("/test")
    public String  hello() {
        System.out.print("服务器接受");
        return "one";
    }

}

这就完成了springMVC初步使用