Springmvc:(二)第一个程序
一、创建流程
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创建maven项目,添加web支持
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导入spring-webmvc依赖
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解决maven静态资源过滤的问题
<build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build>
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File---Project Structure---Artifacts-----WEB-INF----右键新建lib文件夹----单击加号,添加jar包
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编写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"> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--关联springMVC配置--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <!--执行优先级顺序--> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
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创建springmvc.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 http://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--> <context:component-scan base-package="com.ruanyuan.Controller"/> <!-- 让Spring MVC不处理静态资源 js、css、img --> <mvc:default-servlet-handler/> <!--注册默认梳理请求,返回值,参数的类--> <mvc:annotation-driven/> <!--视图解析器:DispatcherServlet给他的ModelAndView--> <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>
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创建HelloController
package com.ruanyuan.Controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import java.lang.annotation.Annotation; @Controller @RequestMapping("/HelloController") public class HelloController { //真实访问地址 : 项目名/HelloController/hello @RequestMapping("/hello") public String sayHello(Model model) { //向模型中添加属性msg与值,可以在JSP页面中取出并渲染 model.addAttribute("msg", "hello,SpringMVC"); //web-inf/jsp/hello.jsp return "hello"; } }
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创建hello.jsp
<%-- Created by IntelliJ IDEA. User: zbp Date: 2020/3/3 Time: 15:35 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> ${msg} </body> </html>
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执行结果
二、拓展
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解决中文乱码问题
<!-- 配置过滤器,解决中文乱码的问题 --> <filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter- class> <!-- 指定字符集 --> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>