Spring4 MVC 简单示例

使用Servlet3.0+无web.xml的配置方式，在SpringMVC里实现WebApplicationInitializer接口便可实现等同于web.xml的配置。

pom.xml 配置文件的内容略…

index.jsp

在src/main/resources下建立views目录，并在此目录下新建index.jps

MyMvcConfig.java

@Configuration@EnableWebMvc@ComponentScan("com.netant.spring4")public class MyMvcConfig {    /** 视图解析器 */    @Bean    public InternalResourceViewResolver viewResolver(){        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();        viewResolver.setPrefix("/WEB-INF/classes/views/"); // 运行时的目录结构        viewResolver.setSuffix(".jsp");        viewResolver.setViewClass(JstlView.class);        return viewResolver;    }}

Web配置

WebInitializer.java

import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.ServletRegistration.Dynamic;import org.springframework.web.WebApplicationInitializer;import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;import org.springframework.web.servlet.DispatcherServlet;/**      * WebApplicationInitializer是Spring用来提供配置Servlet3.0+的接口， * 从而实现了替代web.xml的配置。实现此接口将会自动被SpringServletContainerInitializer(用来启动Servlet3.0容器)获取到。  */public class WebInitializer implements WebApplicationInitializer {    @Override    public void onStartup(ServletContext servletContext) throws ServletException {        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();        context.register(MyMvcConfig.class);        context.setServletContext(servletContext); // 新建WebApplicationContext,注册配置类，并将其和当前ServletContext关联        Dynamic servlet = servletContext.addServlet("dispatcher", new DispatcherServlet(context)); // 注册Spring MVC的DispatcherServlet        servlet.addMapping("/");        servlet.setLoadOnStartup(1);    }}

简单控制器

@Controllerpublic class HelloController {    @RequestMapping("/index")    public String sayHello(){        return "index";    }}

运行

将程序部署到Tomcat中，启动Tomcat并访问http://….

运行结果：