新建 Springweb 测试项目

在编译的spring源码中，新建个测试web项目。

配置项目

新建 module，选择 gradle web 项目，填写项目信息后完成。

修改构建文件 build.gradle

• 增加项目依赖
• 增加servlet依赖即可 ```properties plugins { id ‘war’ id ‘java’ }

group ‘org.springframework’ version ‘5.2.22.RELEASE’

repositories { mavenCentral() mavenCentral() }

dependencies { compile(project(“:spring-context”)) compile(project(“:spring-web”)) compile(project(“:spring-webmvc”)) providedCompile group: ‘javax.servlet’, name: ‘javax.servlet-api’, version: ‘3.1.0’ providedCompile group: ‘javax.servlet’, name: ‘jsp-api’, version: ‘2.0’ testImplementation ‘junit:junit:4.11’ testImplementation ‘org.junit.jupiter:junit-jupiter-api:5.8.1’ testRuntimeOnly ‘org.junit.jupiter:junit-jupiter-engine:5.8.1’ }

test { useJUnitPlatform() }

因为是spring web项目，所以需要mvc的配置文件，applicationContext.xml。在 resouces 文件夹下新建配置文件：
```xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns="http://www.springframework.org/schema/beans"
       xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd ">
    <context:component-scan base-package="cn.lichenghao"/>
    <mvc:annotation-driven/>
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <mvc:default-servlet-handler/>
</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/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

按照配置文件的包路径新建测试类。

package cn.lichenghao.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HomeController {
  @RequestMapping("/")
  public String home() {
    return "index";
  }
}

配置完毕后项目结构：

部署运行

部署在tomcat下运行，新增 Run Configurations

Deployment 选择我们的项目即可，运行访问即可。