Question

我最近创建了Spring maven项目，并且我使用的是基于纯Java的配置，并且在运行该项目时遇到了404。我在这里一无所知。

AppInitializer（替换web.xml）

package com.mzk.mascot.configuration;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

/**
 *
 * @author Ossu
 */
public class WebApplicationBootstrapper implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext sc) throws ServletException {
        AnnotationConfigWebApplicationContext applicationContext=new AnnotationConfigWebApplicationContext();
        AnnotationConfigWebApplicationContext dispatcherContext=new AnnotationConfigWebApplicationContext();

        applicationContext.register(SpringBeanContainer.class);
        dispatcherContext.register(DispatcherServletConfiguration.class);

        ContextLoaderListener contextLoaderListener=new ContextLoaderListener(applicationContext);
        sc.addListener(contextLoaderListener);

        DispatcherServlet dispatcherServlet = new DispatcherServlet(dispatcherContext);
        ServletRegistration.Dynamic dispatcher = sc.addServlet("dispatcher", dispatcherServlet);

        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");
    }
}

Spring bean容器（替换app-context.xml）

package com.mzk.mascot.configuration;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

/**
 *
 * @author Ossu
 */
@Configuration
@EnableWebMvc
@ComponentScan({"com.mzk.mascot.controller"})
public class SpringBeanContainer {

}

最后的Dispatcher-servlet配置文件

package com.mzk.mascot.configuration;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

/**
 *
 * @author Ossu
 */
@Configuration
@EnableWebMvc
@ComponentScan({"com.mzk.mascot.controller"})
public class DispatcherServletConfiguration implements WebMvcConfigurer {

    @Bean
    ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("WEB-INF/view/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        ResourceHandlerRegistration handlerRegistration = registry.addResourceHandler("/resources/**");
        handlerRegistration.addResourceLocations("/resources/");
    }

    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer.favorPathExtension(false);
    }

}

在进行此配置之前，默认情况下，它会通过访问 index.html 来呈现http://localhost:8084/Mascot/。在添加这三个类之后，它会显示404，我仍然无法弄清楚，如果我在任何类中的任何地方出现错误，请帮我。

Answer 1

您所需要做的就是更新DispatcherServletConfiguration类。

首先更新addResourceHandlers()方法并注册静态HTML页面处理程序：

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
    registry.addResourceHandler("/*.html").addResourceLocations("/WEB-INF/static/");
}

然后覆盖addViewControllers()方法，该方法将从 / （根）转发到 /index.html ：

@Override
public void addViewControllers(ViewControllerRegistry registry) {
    registry.addViewController("/").setViewName("forward:/index.html");
}

最后将 index.html 文件移到 WEB-INF / static 文件夹中。

注意：：如果您的 index.html 页面仅重定向到其他地方（例如，在 / welcome 上），则可以进行转发直接：

registry.addViewController("/").setViewName("forward:/welcome");

Spring的基于Java的Config项目显示404

1 个答案: