Apache tomcat Eclipse 动态 Web 模块 3.0 的问题

Question

我使用默认配置创建了 Spring MVC 项目，它在服务器上是 working/running，但是当我将 Project Facets 更改为 J2EE 时6 如下：
现在，当我运行项目时，我收到以下消息

更新
请查看此项目结构：

Controller.java 是

@Controller
public class HomeController {

private static final Logger logger = LoggerFactory.getLogger(HomeController.class);

/**
 * Simply selects the home view to render by returning its name.
 */
@RequestMapping(method = RequestMethod.GET)
public String home(Locale locale, Model model) {
    logger.info("Welcome home! The client locale is {}.", locale);

    Date date = new Date();
    DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);

    String formattedDate = dateFormat.format(date);

    model.addAttribute("serverTime", formattedDate );

    return "home";
}
}

没有任何错误的新控制台输出是：

Jun 20, 2015 6:33:38 PM org.apache.catalina.core.ApplicationContext log INFO: Initializing Spring root WebApplicationContext INFO : org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization started INFO : org.springframework.web.context.support.XmlWebApplicationContext - Refreshing Root WebApplicationContext: startup date [Sat Jun 20 18:33:38 PKT 2015]; root of context hierarchy INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring/root-context.xml] INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1a8f100: defining beans []; root of factory hierarchy INFO : org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 893 ms Jun 20, 2015 6:33:39 PM org.apache.catalina.core.ApplicationContext log INFO: Initializing Spring FrameworkServlet 'appServlet' INFO : org.springframework.web.servlet.DispatcherServlet - FrameworkServlet 'appServlet': initialization started INFO : org.springframework.web.context.support.XmlWebApplicationContext - Refreshing WebApplicationContext for namespace 'appServlet-servlet': startup date [Sat Jun 20 18:33:39 PKT 2015]; parent: Root WebApplicationContext INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring/appServlet/servlet-context.xml] INFO : org.springframework.context.annotation.ClassPathBeanDefinitionScanner - JSR-250 'javax.annotation.ManagedBean' found and supported for component scanning INFO : org.springframework.context.annotation.ClassPathBeanDefinitionScanner - JSR-330 'javax.inject.Named' annotation found and supported for component scanning INFO : org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor - JSR-330 'javax.inject.Inject' annotation found and supported for autowiring INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1c047f0: defining beans [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0,org.springframework.web.servlet.handler.SimpleUrlHandlerMapping#0,org.springframework.web.servlet.view.InternalResourceViewResolver#0,homeController,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@1a8f100 INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "{[/],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String home.com.web.HomeController.home(java.util.Locale,org.springframework.ui.Model) INFO : org.springframework.web.servlet.handler.SimpleUrlHandlerMapping - Mapped URL path [/resources/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0' INFO : org.springframework.web.servlet.DispatcherServlet - FrameworkServlet 'appServlet': initialization completed in 2619 ms

在 http://localhost:8080 上显示 HTTP 状态 404 在这种情况下有什么提示吗？我该怎么办？

Answer 1

您的问题与eclipse 或eclipse 中的动态web 模块无关，只是存在不止一个问题。您的 spring 配置存在一般性问题。

您正在尝试通过 RequestMapping 映射“/”——即使在 Spring MVC 4.1.6 中也不起作用——独立于 Eclipse 或动态 Web 模块.

org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
- Mapped "{[/],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}"
onto public java.lang.String sd.sdse.dsdds.HomeController.home(java.util.Locale,org.springframework.ui.Model)

在 spring.io 论坛中有更多关于如何定义到上下文根的映射的类似问题，例如 "@RequestMapping pointing to /"

您通过将 Spring Dispatcher Servlet 映射到“/”而不是“/*”来存档它并从 @RequestMapping 注释中删除到“/”的显式映射。

您 shared 的项目不是生成日志输出的项目。在 Tomcat.

上部署和执行时，该项目甚至没有启动 SpringContext

要启动 SpringContext，您必须在 web.xml 中配置 ContextLoadListener 和/或 DispatcherServlet 喜欢这里：

<display-name>Home</display-name>
   <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/servlet-config.xml</param-value>
</context-param>

<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value></param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

或者您需要一个 class 实现 WebApplicationInitializer 接口，如下所示：

public class WebAppInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext context) {
        XmlWebApplicationContext rootContext = 
                new XmlWebApplicationContext();
        rootContext.setConfigLocation("/WEB-INF/spring/root-context.xml");

        context.addListener(new ContextLoaderListener(rootContext));

        // Create the dispatcher servlet's Spring application context
        XmlWebApplicationContext servletContext = 
                new XmlWebApplicationContext();
        servletContext.setConfigLocation("/WEB-INF/spring/appServlet/servlet-context.xml");

        // add the dispatcher servlet and map it to /
        ServletRegistration.Dynamic dispatcher = 
                context.addServlet("springDispatcher", new DispatcherServlet(servletContext));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");

    }

}

从您在项目中使用的位置加载 spring 配置文件（root-context.xml、servlet-context.xml）。

可以在github 上找到使用WebApplicationInitializer 的固定版本。我已经向您发送了请求请求。

固定版本的控制台输出为：

INFO : org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor - JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@76dc331c: defining beans [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0,org.springframework.web.servlet.handler.SimpleUrlHandlerMapping#0,org.springframework.web.servlet.view.InternalResourceViewResolver#0,homeController,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@5c23f9fd
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "{[],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String com.dom.son.HomeController.home(java.util.Locale,org.springframework.ui.Model)
INFO : org.springframework.web.servlet.handler.SimpleUrlHandlerMapping - Mapped URL path [/resources/**] onto handler 'org.springframework.web.servlet.resource.ResourceHttpRequestHandler#0'
INFO : org.springframework.web.servlet.DispatcherServlet - FrameworkServlet 'springDispatcher': initialization completed in 430 ms
Jun 21, 2015 12:45:28 PM org.apache.coyote.AbstractProtocol start
Information: Starting ProtocolHandler ["http-bio-8080"]
Jun 21, 2015 12:45:28 PM org.apache.coyote.AbstractProtocol start
Information: Starting ProtocolHandler ["ajp-bio-8009"]
Jun 21, 2015 12:45:28 PM org.apache.catalina.startup.Catalina start
Information: Server startup in 2048 ms
INFO : com.dom.son.HomeController - Welcome home! The client locale is de_DE.

为了解决您的 eclipse 问题，我建议从 eclipse 中删除旧项目并从 github.

重新导入固定版本

在 Eclipse 中：

在 Servers 视图中停止您的 Tomcat 实例。
从您的 Tomcat 中删除部署（上下文菜单 -> 删除）
删除项目（最好将其从磁盘中删除，或将其移动到其他位置）
查看固定版本（我的或你的我的更改）
重新导入固定版本（文件 -> 导入.... -> Maven -> 现有 Maven 项目）

Apache tomcat Eclipse 动态 Web 模块 3.0 的问题

Apache tomcat issue with Eclipse dynamic web module 3.0

java

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tomcat7