英文:
Spring Boot does not resolve View
问题
我正在尝试使用Spring Boot创建一个简单的控制器
配置如下：
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = {"ru.spb.chat.controller"})
public class WebConfig implements WebMvcConfigurer {
@Bean
public ViewResolver viewResolver() {
InternalResourceViewResolver bean = new InternalResourceViewResolver();
bean.setPrefix("/WEB-INF/view/");
bean.setSuffix(".html");
return bean;
}
}
以及Servlet部分：
public class MainWebAppInitializer implements WebApplicationInitializer {
@Override
public void onStartup(final ServletContext sc) throws ServletException {
AnnotationConfigWebApplicationContext root =
new AnnotationConfigWebApplicationContext();
root.scan("ru.spb");
sc.addListener(new ContextLoaderListener(root));
ServletRegistration.Dynamic appServlet =
sc.addServlet("mvc", new DispatcherServlet(new GenericWebApplicationContext()));
appServlet.setLoadOnStartup(1);
appServlet.addMapping("/");
}
}
我的控制器：
@Controller
public class RootController {
@GetMapping("/")
public String root() {
return "login";
}
}
但是当我尝试映射到“/”时，它返回404错误
这是我的项目结构：
[![structure][1]][1]
[1]: https://i.stack.imgur.com/PbK7h.png
英文:
I'am trying to create a simple controller with Spring Boot
Congifuration is:
@Configuration
@EnableWebMvc
@ComponentScan (basePackages = { "ru.spb.chat.controller" })
public class WebConfig implements WebMvcConfigurer {
@Bean
public ViewResolver viewResolver() {
InternalResourceViewResolver bean = new InternalResourceViewResolver();
bean.setPrefix("/WEB-INF/view/");
bean.setSuffix(".html");
return bean;
}
}
and for servlet:
public class MainWebAppInitializer implements WebApplicationInitializer {
@Override
public void onStartup(final ServletContext sc) throws ServletException {
AnnotationConfigWebApplicationContext root =
new AnnotationConfigWebApplicationContext();
root.scan("ru.spb");
sc.addListener(new ContextLoaderListener(root));
ServletRegistration.Dynamic appServlet =
sc.addServlet("mvc", new DispatcherServlet(new GenericWebApplicationContext()));
appServlet.setLoadOnStartup(1);
appServlet.addMapping("/");
}
}
My controller.
@Controller
public class RootController {
@GetMapping ("/")
public String root() {
return "login";
}
}
But when I try to map on "/" it returns 404-ERROR
This is my project-structure:
答案1
得分: 0
移除你的WebConfig，以及移除你的ServletInitializer和MainWebAppInitializer（你可能也可以移除WebSocketConfig并使用Spring Boot的自动配置！）。
让你的ChatApplication扩展SpringBootServletInitializer并实现configure方法。
@SpringBootApplication
public class ChatApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(ChatApplication.class, args);
}
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(ChatApplication.class);
}
}
然后在你的application.properties文件中添加以下内容：
spring.mvc.view.prefix=/WEB-INF/view/
spring.mvc.view.suffix=.html
现在你正在使用适当的Spring Boot自动配置和正确的创建可执行WAR文件的方式。
话虽如此，一般来说，你不希望使用WAR文件（只有在使用JSP时才需要，但在内嵌容器中使用JSP是不推荐的）。
英文:
Remove your WebConfig and remove your ServletInitializer and MainWebAppInitializer. (You can probably also remove the WebSocketConfig and use the auto-configuration from Spring Boot!).
Let your ChatApplication extend SpringBootServletInitializer and implement the configure method.
@SpringBootApplication
public class ChatApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(ChatApplication.class, args);
}
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(ChatApplication.class);
}
}
Then in your application.properties add
spring.mvc.view.prefix=/WEB-INF/view/
spring.mvc.view.suffix=.html
Now you are using the proper Spring Boot auto-configuration AND proper way of creating a WAR which is executable.
That being said, you generally don't want a WAR (only if you use JSP, which is discouraged with embedded containers).
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