Eclipse动态Web模块3.0的Apache tomcat问题
[英]Apache tomcat issue with Eclipse dynamic web module 3.0
问题描述
I created Spring MVC project with default configurations it was working/running on the server but when I changed Project Facets to J2EE 6 as following : 
我使用默认配置创建了Spring MVC项目，该默认配置正在服务器上运行/运行，但是当我将Project Facets更改为J2EE 6时 ，如下所示：
now when I run the project I get following message 现在，当我运行项目时，我收到以下消息
UPDATE UPDATE
Please see this project structure : 请查看此项目结构：
Controller.java is 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";
}
}
New Console out put without any error is : 没有出现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];
with this at http://localhost:8080 also shows HTTP Status 404 Any hint in this case? 在http：// localhost：8080处显示的HTTP状态404在这种情况下有任何提示吗？ What should I do? 我该怎么办？
1 个解决方案
解决方案1
1 已采纳 2015-06-20 10:46:07
Your problem has nothing to do with eclipse or dynamic web modules in eclipse, except there exists more than one problem. 您的问题与eclipse中的eclipse或动态Web模块无关，除非存在多个问题。 You have a general problem in your spring configuration. 您的spring配置中有一个普遍的问题。
You are trying to map '/' via RequestMapping - that does not work even in in Spring MVC 4.1.6 - independent of eclipse or dynamic web module. 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)
There are more similar questions about how define a mapping to the context root in in the spring.io forum like "@RequestMapping pointing to /" 在spring.io论坛中，还有更多有关如何定义到上下文根的映射的类似问题，例如“ @RequestMapping指向/”。
You archive this by mapping the Spring Dispatcher Servlet to "/" not "/*" and by removing the explicit mapping to "/" from your @RequestMapping annotations. 通过将Spring Dispatcher Servlet映射到“ /”而不是“ / *”，并从@RequestMapping批注中删除对“ /”的显式映射，可以对此进行归档。
The Project you've shared is not the one which generates the log output. 您共享的项目不是生成日志输出的项目。 The project not even starts a SpringContext when deployed and executed on Tomcat. 在Tomcat上部署并执行该项目后，它甚至不会启动SpringContext。
To start the SpringContext you'll either have to configure the ContextLoadListener and / or DispatcherServlet in the web.xml like here: 要启动SpringContext，您必须在web.xml配置ContextLoadListener和/或DispatcherServlet ，如下所示：
<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>
Or you need a class that implements the WebApplicationInitializer interface like this one: 或者，您需要一个实现WebApplicationInitializer接口的类，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("/");
}
}
which loads the spring configuration files( root-context.xml , servlet-context.xml ) from the locations you've used in your project. 它从您在项目中使用的位置加载spring配置文件（ root-context.xml ， servlet-context.xml ）。
The fixed version which uses the WebApplicationInitializer can be found on github . 使用WebApplicationInitializer的固定版本可以在github上找到。 I've sent you a pull request. 我已向您发送请求请求。
The console output of the fixed version is: 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.
In order to fix your eclipse problem I would suggest to delete the old project from eclipse and re-import the fixed version from github. 为了解决您的日食问题，我建议从eclipse中删除旧项目，然后从github重新导入固定版本。
In Eclipse: 在Eclipse中：
- In the
Serversview stop your Tomcat instances.在“ Servers视图中，停止Tomcat实例。 - Remove the deployments from your Tomcat (context menu - > delete) 从Tomcat中删除部署（上下文菜单->删除）
- Delete the Project (ideally remove it from disk, or move it to a different location) 删除项目（最好将其从磁盘上删除，或将其移动到其他位置）
- Check out the fixed version (mine or yours with my changes) 检出固定版本（我的变更是我的还是您的，我的变更）
- Re-import the fixed version (File -> Import.... -> Maven -> Existing Maven Project) 重新导入固定版本（文件->导入....-> Maven->现有Maven项目）
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