SpringMVC初学
一.HelloWorld
项目结构:
1. 加入的jar包
2. 配置web.xml文件
(1) 配置DispatcherSevlet
<?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_4_0.xsd"
version="4.0">
<!--配置DispatcherServlet-->
<servlet>
<servlet-name>springDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--配置DispatcherServlet的一个初始化参数:配置SpringVC配置文件的位置和名称-->
<init-param>
<!--名称-->
<param-name>contextConfigLocation</param-name>
<!--位置-->
<param-value>classpath:spingmvc.xml</param-value>
</init-param>
</servlet>
<!--配置映射文件-->
<servlet-mapping>
<!--该名称与配置DispatcherServlet的Servlet下的<servlet-name>一致 -->
<servlet-name>springDispatcherServlet</servlet-name>
<!-- 路径 :当前表示所有路径-->
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
3. 新建控制器类—HelloWorld.java
package com.archer.helloworld;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* 控制器
* @author Archer
* @date 2018-12-29 10:08
**/
@Controller
public class HelloWorld {
/**
* 映射路径
* 1.使用 @RequestMapping来注解请求的url /hello表示url
* 2. 返回值会通过试图解析器解析为实际的物理视图,对于InternalResourceViewResolver视图解析器,会有如下解析:
* /WEN-INF/views/success.jsp
*
* prefix:/WEN-INF/views/
* suffix: .jsp
* @return
*/
@RequestMapping("/hello")
public String hello(){
System.out.println("Hello World!");
return "success";
}
}
4. springmvc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/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">
<!--springmvc的配置文件-->
<!--配置自定义的扫描包-->
<context:component-scan base-package="com.archer.helloworld"></context:component-scan>
<!--配置视图解析器:如何把handler方法返回值解析为实际的物理视图-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>