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SpringMVC唉姆威西

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HelloWorld

导入依赖

比Spring多了web和webmvc

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<dependency>
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  <groupId>org.springframework</groupId>
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  <artifactId>spring-web</artifactId>
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  <version>5.2.3.RELEASE</version>
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</dependency>
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<dependency>
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  <groupId>org.springframework</groupId>
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  <artifactId>spring-webmvc</artifactId>
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  <version>5.2.3.RELEASE</version>
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</dependency>

添加Tomcat

Edit Configuration–>左上角” + “号–>选择Tomcat Server–>local

右侧server标签卡里：Application server右边配置tomcat根目录–>OK

web.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
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         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
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  <!--<!DOCTYPE web-app PUBLIC-->
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  <!-- "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"-->
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  <!-- "http://java.sun.com/dtd/web-app_2_3.dtd" >-->
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<!--<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">-->
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    <display-name>Archetype Created Web Application</display-name>
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  <servlet>
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    <servlet-name>springmvc</servlet-name>
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    <!--servlet-class中的值是spring-webmvc包提供的类，即前端控制器，用于控制所有请求 -->
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    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
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    <init-param>
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      <param-name>contextConfigLocation</param-name>
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      <param-value>classpath:spring-mvc.xml</param-value>
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    </init-param>
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    <load-on-startup>1</load-on-startup>
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  </servlet>
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  <servlet-mapping>
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    <servlet-name>springmvc</servlet-name>
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    <!--url-pattern（重点）中有3个值，分别为/、 /*、 *.action  -->
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    <url-pattern>/</url-pattern>
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  </servlet-mapping>
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</web-app>

springmvc.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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       xmlns:mvc="http://www.springframework.org/schema/mvc"
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       xmlns:context="http://www.springframework.org/schema/context"
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       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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       xsi:schemaLocation="http://www.springframework.org/schema/beans
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       http://www.springframework.org/schema/beans/spring-beans.xsd
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       http://www.springframework.org/schema/mvc
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       http://www.springframework.org/schema/mvc/spring-mvc.xsd
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       http://www.springframework.org/schema/context
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       http://www.springframework.org/schema/context/spring-context.xsd">
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    <context:component-scan base-package="com.czw.controller"></context:component-scan>
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</beans>

JSP页面

index.jsp（webapp下），success.jsp（webapp/WEB-INF/pages/success.jsp）

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<a href="hello">跳转页面到helloworld</a>

控制器Controller

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@Controller
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public class HelloController {
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	@RequestMapping("/hello")
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	public String hello(){
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    	System.out.println("处理hello请求。。。");
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    	return "/WEB-INF/pages/success.jsp";
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	}
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}

点击超链接跳转成功

对比Spring Boot

选择web模块

写两个页面

放在resources/static下

配置视图控制器

如果用了thymeleaf就不用配了，在templates下建文件，自动带上前后缀。

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@Component
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public class HelloConfig implements WebMvcConfigurer {
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    @Override
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    public void addViewControllers(ViewControllerRegistry registry) {
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        registry.addViewController("/").setViewName("/hello.html");
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        registry.addViewController("/world").setViewName("/world.html");
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    }
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}

控制层Controller

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@Controller
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public class HWController {
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    @GetMapping("/hello")
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    public String hello(){
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        System.out.println("处理Hello请求");
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        return "/world";
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    }
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}

完善

视图解析器

springmvc.xml里

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<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
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    <property name="prefix" value="/WEB-INF/pages/"/>
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    <property name="suffix" value=".jsp"/>
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</bean>

总结

头发-1