不需要 spring 的xml不需要 web.xml

1 新建工程

2 pom

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.tzb</groupId> <artifactId>javassm</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.6.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency> </dependencies> </project>

3 配置类

3.1 spring 配置类

package com.tzb.config; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.FilterType; import org.springframework.stereotype.Controller; @Configuration @ComponentScan(basePackages = "com.tzb", useDefaultFilters = true, excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION, classes = Controller.class)}) public class SpringConfig { }

3.2 spring mvc 配置类

package com.tzb.config; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.FilterType; import org.springframework.stereotype.Controller; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; @Configuration @ComponentScan(basePackages = "com.tzb", useDefaultFilters = false, includeFilters = { @ComponentScan.Filter(type = FilterType.ANNOTATION, classes = Controller.class), @ComponentScan.Filter(type = FilterType.ANNOTATION, classes = Configuration.class)}) public class SpringMVCConfig extends WebMvcConfigurationSupport { /** * 配置静态资源 * @param registry */ @Override protected void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/static/**") .addResourceLocations("classpath:/static/"); } }

3.3 web 配置类

package com.tzb.config; import org.springframework.web.WebApplicationInitializer; import org.springframework.web.context.support.AnnotationConfigWebApplicationContext; import org.springframework.web.servlet.DispatcherServlet; import javax.servlet.ServletException; import javax.servlet.ServletRegistration; public class WebInit implements WebApplicationInitializer { public void onStartup(javax.servlet.ServletContext servletContext) throws ServletException { AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext(); ctx.setServletContext(servletContext); ctx.register(SpringMVCConfig.class); ServletRegistration.Dynamic springmvc = servletContext.addServlet("springmvc", new DispatcherServlet(ctx)); springmvc.addMapping("/"); springmvc.setLoadOnStartup(1); } }

4 Service

package com.tzb.service; import org.springframework.stereotype.Service; @Service public class HelloService { public String sayHello() { return "Hello"; } }

5 Controller

package com.tzb.controller; import com.tzb.service.HelloService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class HelloController { @Autowired private HelloService helloService; @GetMapping("/hello") public String hello(){ return helloService.sayHello(); } }

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