springmvc-annotation

1.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/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <!--注册dispatcherServlet-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--关联一个springmvc的配置文件【servlet:name】-servlet.xml-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc-servlet.xml</param-value>
        </init-param>
        <!--启动级别-1-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!--/ 匹配所有的请求 （不包括.jsp）-->
    <!--/* 匹配所有的请求 （包括.jsp）-->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

2.springmvc-servlet.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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           https://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context
                           https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
   <!--自动扫描包，让指定路径下的注解生效，由ioc容器统一管理-->
   <context:component-scan base-package="com.controller"/>

    <!-- 让springmvc不处理静态资源  css,js,html,mp3,mp4-->
    <mvc:default-servlet-handler/>

    <!--
         支持mvc注解驱动
         在spring中一般用@RequestMapping来完成映射关系
         要想@RequestMapping生效 必须向上下文中注册@DefaultAnnotationHandleMappring
         和一个AnnotationMethodHandleerAdapter实例这两个实例分别在类级别和方法级别处理
         而annotation-driven的配置帮助我们自动完成上述两个实例的注入
         -->
    <mvc:annotation-driven></mvc:annotation-driven>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="InternalResourceViewResolver">
        <!--前缀-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

3.HelloController

package com.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HelloController {
    @RequestMapping("/hello")
    public String hello(Model model){
        //封装数据
        model.addAttribute("msg","hello,springmvcannotation");
        return "hello";//会被视图解析器处理

    }
}

4.hello.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    ${msg}
</body>
</html>

总结：在浏览器上url后加上hello，访问会跳转到hello.jsp界面输出      hello,springmvcannotation

          具体流程及步骤已在代码中做了注释。

posted @ 2022-04-21 20:53  代码李小白  阅读(42)  评论(0)    收藏  举报