springmvc框架快速入门

（1）创建一个maven得web工程

（2）引入springmvc的依赖

<dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.3.4</version>
    </dependency>
</dependencies>

(3) springmvc得配置文件

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <!--包扫码 controller中类-->
    <context:component-scan base-package="com.ykq.controller"/>
    <!--视图解析器
           prefix=前缀  /views/
           suffix=后缀  .jsp
    -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="prefix" value="/views/"/>
         <property name="suffix" value=".jsp"/>
    </bean>
</beans>

（4）创建一个控制类

@Controller //表示该类为控制层类。
public class HelloController {
    @RequestMapping("/hello")
    public ModelAndView hello(){
        System.out.println("hello方法被调用了");
        ModelAndView mv=new ModelAndView("hello");
        return mv;
    }
}

(5) 在web.xml文件加载springmvc得配置文件

<servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--指定springmvc得配置文件的路径-->
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:springmvc.xml</param-value>
    </init-param>
</servlet>

<servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

（6）测试 http://localhost:8080/项目名/资源

 

 

2.1: springmvc得流程图

 

 

2.2: handler如何把java中对象传递给网页。