Jetty + SpringMVC：设置 configureDefaultServletHandling 时出错，因为找不到默认的 servlet 名称

Question

我创建了一个没有 web.xml 和 spring-servlet.xml 配置文件的简单应用程序。我只是在 Java 代码中配置。这是项目结构：

这是我的主class:

public class TripMapServer {

private static final int DEFAULT_PORT = 8080;
private static final String CONTEXT_PATH = "/";
private static final String MAPPING_URL = "/";
private static final String CONFIG_LOCATION = "com.biendltb.config";
private static final String DEFAULT_PROFILE = "dev";

public static void main(String[] args) throws Exception {
    new TripMapServer().startJetty(getPortFromArgs(args));
}

private static int getPortFromArgs(String[] args) {
    if (args.length > 0) {
        try {
            return Integer.valueOf(args[0]);
        } catch (NumberFormatException ignore) {
        }
    }
    return DEFAULT_PORT;
}

private void startJetty(int port) throws Exception {
    Server server = new Server(port);
    server.setHandler(getServletContextHandler(getContext()));
    server.start();
    server.join();
}

private static ServletContextHandler getServletContextHandler(WebApplicationContext context) throws IOException {
    ServletContextHandler contextHandler = new ServletContextHandler();
    contextHandler.setErrorHandler(null);
    contextHandler.setContextPath(CONTEXT_PATH);
    contextHandler.addServlet(new ServletHolder(new DispatcherServlet(context)), MAPPING_URL);
    contextHandler.addEventListener(new ContextLoaderListener(context));
    contextHandler.setResourceBase(new ClassPathResource("webapp").getURI().toString());
    return contextHandler;
}

private static WebApplicationContext getContext() {
    AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
    context.setConfigLocation(CONFIG_LOCATION);
    context.getEnvironment().setDefaultProfiles(DEFAULT_PROFILE);
    return context;
 }
}

我创建了另一个名为 WebConfig.java 的 class 来设置 spring-servlet 的配置：

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = {"com.biendltb.controller"})
public class WebConfig extends WebMvcConfigurerAdapter{ 

private static final Charset UTF8 = Charset.forName("UTF-8");

@Autowired
public Environment env;

@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    converters.add(stringConverter());
}

private StringHttpMessageConverter stringConverter() {
    StringHttpMessageConverter stringConverter = new StringHttpMessageConverter();
    stringConverter.setSupportedMediaTypes(Arrays.asList(new MediaType("text", "plain", UTF8)));
    return stringConverter;
}

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/assets/**").addResourceLocations("classpath:/src/main/resources/").setCachePeriod(Integer.MAX_VALUE);
    registry.addResourceHandler("/js/**").addResourceLocations("/js/").setCachePeriod(Integer.MAX_VALUE);
    registry.addResourceHandler("/css/**").addResourceLocations("/css/").setCachePeriod(Integer.MAX_VALUE);
    registry.addResourceHandler("/img/**").addResourceLocations("/img/").setCachePeriod(Integer.MAX_VALUE);
}

@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
    configurer.enable();
}

@Bean
public InternalResourceViewResolver getInternalResourceViewResolver() {
    InternalResourceViewResolver resolver = new InternalResourceViewResolver();
    resolver.setPrefix("/src/main/resources/pages/");
    resolver.setSuffix(".jsp");
    return resolver;
 }
}

添加configureDefaultServletHandling函数时发生错误。

[org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.HandlerMapping]: Factory method 'defaultServletHandlerMapping' threw exception; nested exception is java.lang.IllegalStateException: Unable to locate the default servlet for serving static content. Please set the 'defaultServletName' property explicitly.

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultServletHandlerMapping' defined in class path resource [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.HandlerMapping]: Factory method 'defaultServletHandlerMapping' threw exception; nested exception is java.lang.IllegalStateException: Unable to locate the default servlet for serving static content. Please set the 'defaultServletName' property explicitly.

找不到servlet 的默认名称。通常，servlet 的默认名称将是 "default".

我想也许我应该设置 servlet 名称来解决这个问题。

你有解决这个问题的办法吗？

抱歉代码格式显示不正确。感谢您的支持。非常感谢。

Answer 1

我已经找到如何通过 java 代码为 Spring servlet 设置名称：

contextHandler.addServlet(new ServletHolder("default", new DispatcherServlet(context)), MAPPING_URL);

但是我又遇到了一个问题，那就是：

java.lang.NoClassDefFoundError: Could not initialize class org.springframework.web.util.NestedServletException

我尝试 google，许多人遇到 NoClassDefFoundError 但没有人遇到问题 org.springframework.web.util.NestedServletException .

我再次检查以确保添加了所有依赖项。

也许我应该 post 关于那个问题的另一个问题 :(

Jetty + SpringMVC：设置 configureDefaultServletHandling 时出错，因为找不到默认的 servlet 名称

Jetty + SpringMVC: Error when set configureDefaultServletHandling because cannot find the default servlet name

java

jsp

spring-mvc

servlets

embedded-jetty