springMVC的快速搭建------Java配置

快来打我* 2022-06-05 08:15 193阅读 0赞

**web.xml和applicationContext中的配置都是用java代码的方式实现**

1.创建webInitlizer类（对应的是web.xml）实现WebApplicationInitlizer接口，重写onstartup方法。

package cx.study.SpringMVC;
    
    import org.springframework.web.WebApplicationInitializer;
    import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
    import org.springframework.web.servlet.DispatcherServlet;
    
    import javax.servlet.ServletContext;
    import javax.servlet.ServletException;
    import javax.servlet.ServletRegistration.Dynamic;
    
    public class WebInitlizer implements WebApplicationInitializer {
        @Override
        public void onStartup(ServletContext servletContext) throws ServletException {
            AnnotationConfigWebApplicationContext cxf=
                    new AnnotationConfigWebApplicationContext();
            cxf.register(MyMvcConfig.class);
            cxf.setServletContext(servletContext);
    
            Dynamic servlet=servletContext.addServlet("dispatcher",new DispatcherServlet(cxf));
            servlet.setLoadOnStartup(1);
            servlet.addMapping("/");
    
        }
    }

2.创建MyMvcConfig类，继承WebMvcConfigurerAdapter

package cx.study.SpringMVC;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    
    import org.springframework.web.multipart.MultipartResolver;
    import org.springframework.web.multipart.commons.CommonsMultipartResolver;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
    import org.springframework.web.servlet.view.InternalResourceViewResolver;
    import org.springframework.web.servlet.view.JstlView;
    @Configuration
    @EnableWebMvc
    @ComponentScan("cx.study.SpringMVC")
    public class MyMvcConfig extends WebMvcConfigurerAdapter {
    
        @Bean  //视图解析器 public InternalResourceViewResolver viewResolver(){
            InternalResourceViewResolver viewResolver=
                    new InternalResourceViewResolver();
            viewResolver.setPrefix("/WEB-INF/views/");
            viewResolver.setSuffix(".jsp");
            viewResolver.setViewClass(JstlView.class);
    
            return viewResolver;
        }

}

3.controller

@Controller
    public class UploadController {
        @RequestMapping("/")
        public String index(){
           
            return "index";
    
        }