全注解的使用方式
application.xml
<?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"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jeehttp://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<context:component-scan base-package="springmvc"></context:component-scan>
<mvc:annotation-driven></mvc:annotation-driven>
</beans>
web.xml
<?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/javaeehttp://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:application.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
quaninnotation类
package springmvc;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Controller
public class quaninnotation {
@RequestMapping("/math")
public ModelAndView method(HttpServletRequest req, HttpServletResponse resp){
ModelAndView mvc=new ModelAndView();
mvc.addObject("msg","你好吗？世界");
mvc.setViewName("/hello.jsp");
return mvc;
}
}
hello.jsp
<%--
Created by IntelliJ IDEA.
User: Lenovo
Date: 2018/11/17
Time: 14:57
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
${msg}
</head>
<body>
${msg}
</body>
</html>
结果如下
此时仍然存在以下问题，无法阅读静态资源，例如.html的文件，新建一个hello.html的文件，发现其无法被找到。（这就涉及到静态资源的处理）
hello.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
fsdfsdkfskdf
</body>
</html>
原因：
tomcat中也有很多内置的servlet，比如说数据的回显,是怎么样将我们封装的java对象放在我们的jsp页面进行回显呢?
由tomcat里面的servlet做的
同理,我们需要访问一个静态资源,tomcat也有对应的servlet为我们处理,恰好该servlet的映射路径也为/
在tomcat中的web.xml是先加载的,项目的web.xml是后加载的
如果配置了相同的路径，后面的会覆盖前面的.
也就是说,springMVC中的DispatcherServlet的映射路径覆盖了tomcat默认对静态资源的处理的路径
如果配置为/,那么Dispatcherservlet是不是需要对静态资源进行支持？
解决方案：
需要Spring添加支持静态资源处理的配置:
<!-- 要支持对静态资源的处理 -->
<mvc:default-servlet-handler/>
<?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"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jeehttp://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<context:component-scan base-package="springmvc"></context:component-scan>
<mvc:annotation-driven></mvc:annotation-driven>
<mvc:default-servlet-handler></mvc:default-servlet-handler>
</beans>
