Spring4 MVC 简单示例

素颜马尾好姑娘i 2022-07-16 08:10 216阅读 0赞

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

![这里写图片描述][20161011112634067]

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

@Controller
    public 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：

![这里写图片描述][20161011114636527]

[20161011112634067]: /images/20220716/760f91d2aa8046d3aa79b97fd35d1d1c.png
[20161011114636527]: /images/20220716/49a2f5d6c47a477e86b2888eac5e368e.png