获取未找到具有URI的HTTP请求的映射

Question

我正在尝试处理Spring调度程序servlet中的请求。

我的web.xml文件中具有的servlet：

<servlet> 
    <servlet-name>ApplicationDispatcher</servlet-name> 
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
    <init-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value>/WEB-INF/SpringConfig/WebApplication.xml</param-value> 
    </init-param> 
    <load-on-startup>2</load-on-startup> 
</servlet> 

<servlet-mapping> 
    <servlet-name>ApplicationDispatcher</servlet-name> 
    <url-pattern>*.json</url-pattern> 
    <url-pattern>*.do</url-pattern> 
    <url-pattern>/entities/*</url-pattern> 
</servlet-mapping> 

我的控制器看起来：

@Controller(value="entities") 
public class EntitiesController { 
    private static final Logger LOGGER = Logger.getLogger(EntitiesController.class); 

    @Autowired 
    private IEntityDataService iEntityDataService; 

    @RequestMapping("/list") 
    public String displayAllEntities() { 
     LOGGER.info("Displaying entity dashboard"); 
     return "entity_landing"; 
    } 

    @RequestMapping("/display") 
    public String displayCheckpointDashboard(Integer id) { 
     LOGGER.info("Displaying checkpoint dashboard for id " + id); 
     return "entity"; 
    } 

    @RequestMapping("/update") 
    public String displayUpdateEntity(Integer id) { 
     System.out.println("Update id " + id); 
     return "new_entity"; 
    } 

    @RequestMapping("/add") 
    public String displayNewEntity() { 
     LOGGER.info("Displaying new entity page"); 
     return "new_entity"; 
    } 
} 

我看到以下日志在我的应用程序日志：

2016-01-13 16:15:12 INFO RequestMappingHandlerMapping:180 - Mapped "{[/entity/add/entityDetails.do],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String com.test.EntityController.saveEntityDetails(com.test.vo.EntityCheckpointsVo) 
2016-01-13 16:15:12 INFO RequestMappingHandlerMapping:180 - Mapped "{[/entities/list],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String com.test.EntitiesController.displayAllEntities() 
2016-01-13 16:15:12 INFO RequestMappingHandlerMapping:180 - Mapped "{[/entities/add],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String com.test.EntitiesController.displayNewEntity() 
2016-01-13 16:15:12 INFO DispatcherServlet:476 - FrameworkServlet 'ApplicationDispatcher': initialization completed in 950 ms 
2016-01-13 16:15:12 WARN PageNotFound:1116 - No mapping found for HTTP request with URI [/TestProject/entities/add] in DispatcherServlet with name 'ApplicationDispatcher' 
2016-01-13 16:15:17 WARN PageNotFound:1116 - No mapping found for HTTP request with URI [/TestProject/entities/add] in DispatcherServlet with name 'ApplicationDispatcher' 
2016-01-13 16:17:04 WARN PageNotFound:1116 - No mapping found for HTTP request with URI [/TestProject/entities/add] in DispatcherServlet with name 'ApplicationDispatcher' 

我我没有任何线索，因为日志说有/entities/add已注册。我能够访问其他URL，如localhost：8080/TestProject/entity/add/entityDetails.do，但我无法访问localhost：8080/TestProject/entities/add。

请帮我看看这里。

感谢

更新：

段从EntityController

@Controller 
@RequestMapping(value = "/entity") 
public class EntityController { 
    @RequestMapping(value = "/add/entityDetails.do", method = RequestMethod.GET) 
    public String saveEntityDetails(EntityCheckpointsVo entityCheckpointsVo) { 
     return "success"; 
    } 
} 

Answer 1

如果您尝试点击以下网址，它将工作。

localhost:8080/TestProject/entities/entities/add 

这是因为在URL中的第一个“实体”是越来越因/实体消费/ *在web.xml模式。在使用这个字符串之后，剩余的路径uri会发送到调度程序。在这种情况下，实体/添加到调度程序，它工作正常。

localhost:8080/TestProject/entities/add 

而由你“实体”中提到的URL将被占用，只有“加”是留给其调度没有映射。

如果你有一个servlet映射类似以下内容：

<url-pattern>/abc/def/*</url-pattern> 

则一般与此模式的所有春天的请求映射，URL将是这样的：

localhost:8080/TestProject/abc/def/{custom request mapping} 

的URL /实体/添加请求映射，这将是：

localhost:8080/TestProject/abc/def/entities/add 

相关的类，方法名称和代码片段显示消耗从Spring源代码发生的地方。

我找不到链接。所以我直接进入代码。如果你为了遍历这些提到的类和方法，你可以看到，为什么它是由URI路径消耗：
1. org.springframework.web.servlet.DispatcherServlet getHandler：

从调度Servlet和相关类

片段（HttpServletRequest的请求）
2. org.springframework.web.servlet.handler.AbstractHandlerMapping getHandler（HttpServletRequest的请求）
3. org.springframework.web.servlet.handler.AbstractHandlerMapping getHandlerExecutionChain（对象的处理程序，的HttpServletRequest请求） String lookupPath = this.urlPathHelper.getLookupPathForRequest（request）;
4. org.springframework.web.util.UrlPathHelper getLookupPathForRequest（HttpServletRequest request）。 this.alwaysUseFullPath = false的默认值为false。从路径uri消费发生。你可以在变量“休息”这将包含我们的春天请求映射/实体/添加在这篇文章。
5. org.springframework.web.util.UrlPathHelper getPathWithinServletMapping（HttpServletRequest请求） String path = getRemainingPath（pathWithinApp，servletPath，false）;

public String getLookupPathForRequest(HttpServletRequest request) { 
    // Always use full path within current servlet context? 
    if (this.alwaysUseFullPath) { // default this.alwaysUseFullPath=false 
     return getPathWithinApplication(request); 
    } 
    // Else, use path within current servlet mapping if applicable 
    String rest = getPathWithinServletMapping(request); 
    if (!"".equals(rest)) { 
     return rest; 
    } 
    else { 
     return getPathWithinApplication(request); 
    } 
} 

从这里你可以很容易地更深入地发现它是如何从路径uri消费的。

Answer 2

我可以看到现在的区别...

@Controller(value="entities") 
public class EntitiesController { 

VS

@Controller 
@RequestMapping(value = "/entity") 
public class EntityController { 

您不必RequestMapping在EntitiesController ...你知道大概，value在@Controller是组件的逻辑名称...

注：基于prem kumar's answer我不知道这是否是一个错误或设计...