spring java配置问题: Rejected bean name 'requestMappingHandlerMapping' : no URL paths identified

Question

我正在使用 spring java 配置来创建一个网络应用。

当我在 tomcat 上运行时，它说找不到资源/myapp/myapp

在控制台输出中，我注意到以下内容。我不确定这是否会导致任何问题。

我只显示那些看起来很奇怪的日志行。因为日志太大了

INFO: validateJarFile(C:\libraries\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\myapp\WEB-INF\lib\javax.servlet-api-3.0.1.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class


Creating instance of bean 'beanNameHandlerMapping'
Returning cached instance of singleton bean 'delegatingWebMvcConfiguration'
Eagerly caching bean 'beanNameHandlerMapping' to allow for resolving potential circular     references
Looking for URL mappings in application context: Root WebApplicationContext: startup date [Mon J     un 04 13:28:33 EDT 2012]; root of context hierarchy
Rejected bean name  'org.springframework.context.annotation.internalConfigurationAnnotationProcessor': no URL paths identified
Rejected bean name 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor': no URL paths identified
Rejected bean name 'org.springframework.context.annotation.internalRequiredAnnotationProcessor': no URL paths identified
Rejected bean name 'org.springframework.context.annotation.internalCommonAnnotationProcessor': no URL paths identified
Rejected bean name 'webAppContextConfig': no URL paths identified
Rejected bean name 'org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0': no URL paths identified
Rejected bean name 'delegatingWebMvcConfiguration': no URL paths identified
Rejected bean name 'requestMappingHandlerMapping': no URL paths identified
Rejected bean name 'viewControllerHandlerMapping': no URL paths identified
Rejected bean name 'beanNameHandlerMapping': no URL paths identified
Rejected bean name 'resourceHandlerMapping': no URL paths identified
Rejected bean name 'defaultServletHandlerMapping': no URL paths identified
Rejected bean name 'requestMappingHandlerAdapter': no URL paths identified
Rejected bean name 'mvcConversionService': no URL paths identified
Rejected bean name 'mvcValidator': no URL paths identified
Rejected bean name 'httpRequestHandlerAdapter': no URL paths identified
Rejected bean name 'simpleControllerHandlerAdapter': no URL paths identified
Rejected bean name 'handlerExceptionResolver': no URL paths identified
Rejected bean name 'configureInternalResourceViewResolver': no URL paths identified
Rejected bean name 'environment': no URL paths identified
Rejected bean name 'systemProperties': no URL paths identified
Rejected bean name 'systemEnvironment': no URL paths identified
Rejected bean name 'servletContext': no URL paths identified
Rejected bean name 'contextParameters': no URL paths identified
Rejected bean name 'contextAttributes': no URL paths identified
Rejected bean name 'importRegistry': no URL paths identified
Rejected bean name 'messageSource': no URL paths identified
Rejected bean name 'applicationEventMulticaster': no URL paths identified
Finished creating instance of bean 'beanNameHandlerMapping'
Creating shared instance of singleton bean 'resourceHandlerMapping'
Creating instance of bean 'resourceHandlerMapping'
Returning cached instance of singleton bean 'delegatingWebMvcConfiguration'
Eagerly caching bean 'resourceHandlerMapping' to allow for resolving potential circular references
Mapped URL path [/css/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
Mapped URL path [/scripts/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
Mapped URL path [/images/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
Finished creating instance of bean 'resourceHandlerMapping'

这是 WebAppContextConfig.java

package com.example;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.example")
public class WebAppContextConfig extends WebMvcConfigurerAdapter{
//Resolve logical view names to .jsp resources in /WEB-INF/views directory

@Bean
public InternalResourceViewResolver configureInternalResourceViewResolver() {
    InternalResourceViewResolver resolver = new InternalResourceViewResolver();
    resolver.setPrefix("WEB-INF/jsp/");
    resolver.setSuffix(".jsp");
    return resolver;
}

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/scripts/**").addResourceLocations("/scripts/");
    registry.addResourceHandler("/css/**").addResourceLocations("/css/");
    registry.addResourceHandler("/images/**").addResourceLocations("/images/");
}
}

这是 WebAppInitializer.java

 package com.example;

 import javax.servlet.ServletContext;
 import javax.servlet.ServletException;
 import javax.servlet.ServletRegistration;

 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.web.WebApplicationInitializer;
 import org.springframework.web.context.ContextLoaderListener;
 import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
 import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;

 public class WebAppInitializer implements WebApplicationInitializer {

/* (non-Javadoc)
 * @see org.springframework.web.WebApplicationInitializer#onStartup(javax.servlet.ServletContext)
 */
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
    AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
    rootContext.register(WebAppContextConfig.class);
    servletContext.addListener(new ContextLoaderListener(rootContext));

      AnnotationConfigWebApplicationContext dispatcherContext = 
                new AnnotationConfigWebApplicationContext();
              dispatcherContext.register(WebAppContextConfig.class);

    ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(rootContext));
    dispatcher.setLoadOnStartup(1);
    dispatcher.addMapping("/");


    DefaultServletHandlerConfigurer defaultConfig = new DefaultServletHandlerConfigurer(servletContext);
    defaultConfig.enable();

}

}

还有什么好的地方可以寻找基于 java 的 spring mvc 配置？

谢谢

Answer 1

这不是@ravi 的根本原因，但我确实看到了一些我想强调的问题:

一个。您似乎通过 ContextLoaderListener 和 Dispatcher servlet 两次加载 Spring Java Config 文件，仅通过 ContextLoaderListener 执行此操作，您可以通过这种方式定义 DispatcherServlet - 只需加载一个空上下文(理想情况下有两个 java 配置 -一个用于核心应用程序，一个用于 Web 配置):

ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new GenericWebApplicationContext());
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");

您能否使用 log4j 启​​用 Debug模式并查看还记录了什么 - 如果信息不够，请在跟踪级别记录。

Internal View Resolver 路径看起来有点不对 - 您缺少前向“/”:

resolver.setPrefix("/WEB-INF/jsp/");

你能不能试试这些，看看你现在看到了什么。