Question

在我的Spring控制器中，我尝试获得3个路径变量：

@RequestMapping("{language}/{country}/{term}/catalogue") - @PathVariable String language, @PathVariable String country, @PathVariable String term

不幸的是，servlet无法识别它。

有绑定URI的方法，例如
@RequestMapping("**/catalogue")以及@RequestMapping("{language}/{country}/catalogue")也可以使用，但是第三个路径变量会停止工作。

控制器本身也映射到特定路径。

路径变量是否有限制？是否有可能对其他通配符（例如@RequestMapping("**"))）进行更高评估？例如，2个通配符比3个定义的值更具特异性。但通配符应该是praxis中的最后一个匹配选项。

关于出现的错误：
首先，使用通配符映射，它们将匹配。当我禁用通配符映射时，会抛出org.springframework.web.HttpRequestMethodNotSupportedException错误。

15:42:53,881  DEBUG [http-bio-18091-exec-31] (org.springframework.web.servlet.DispatcherServlet) - Handler execution resulted in exception - forwarding to resolved error view: ModelAndView: reference to view with name 'errors/exception'; model is null
org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodResolver.resolveHandlerMethod(AnnotationMethodHandlerAdapter.java:665)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:431)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at [device detection filter]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)

Controller方法：

@RequestMapping(value = "{language}/{country}/{term}/catalogue", method = RequestMethod.GET)
public ModelAndView catalogue(HttpServletRequest request, HttpServletResponse response, @PathVariable("language") String language, @PathVariable("country") String country, @PathVariable("term") String term, @RequestParam(value = "d", defaultValue = "") String device, @RequestParam(value = "embedded", defaultValue = "false") String embedded, @RequestParam(value = "id", defaultValue = "") String idString, @RequestParam(value = "nr", defaultValue = "") String nr) {

问一下，来自控制器的所有 RequestMappings （抱歉，我无法在此处发布控制器的完整代码）：

@Controller
@RequestMapping("xyz/")
public class Controller {

@RequestMapping(value = "{language}/{country}/{term}/catalogue", method = RequestMethod.GET)

@RequestMapping("**")

@RequestMapping("{language}/{country}/product")

@RequestMapping("{language}/{country}/product-detail")

@RequestMapping("{language}/{country}/product-search")

@RequestMapping("{language}/{country}/dealer-search")

@RequestMapping("{language}/{country}/product-finder")

@RequestMapping("{language}/{country}/table")

@RequestMapping("**/languages")

@RequestMapping("**/chooseLanguages")
}

感谢您的帮助。

Answer 1

试试这个。不要忘记方法参数

中路径变量声明中的("lang")

@RequestMapping(value = "/{lang}/{count}/{term}", method=RequestMethod.GET)
public ResponseEntity<?> getSomething(@PathVariable("lang") String lang, @PathVariable("count") String count, @PathVariable("term") String term) {

Answer 2

首先，您在控制器/（或xyz @RequestMapping的{{1}}末尾错过/（斜杠）在每个方法的开始@RequestMapping）。这是您的3路径变量方法从不调用的主要原因。

@RequestMapping(value = "{language}/{country}/{term}/catalogue", method = RequestMethod.GET)

然而，一旦你解决了这个问题，我想你可能还有另外一个问题。根据Spring文档（链接here）：

当URL匹配多个模式时，使用排序来查找最具体的匹配。

具有较低URI变量和通配符计数的模式被认为更具体。

这意味着当您启用通配符匹配时，即使您在控制器/的末尾添加了@RequestMapping，也不会调用您的3路径变量方法，因为具有通配符的那个被Spring认为更具体。

请检查所有@RequestMapping s是否有丢失的斜杠。我建议您始终使用斜杠，这样可以更轻松地区分代码中的URL映射。

Answer 3

这可能是一个错误（在Spring 4.1中已修复）：请查看SPR-6741。

如问题中所述，您拥有相同的控制器：

具有3个路径变量的映射
a＆＃34; fallback＆＃34;映射/**

Answer 4

只需将其放在您的代码中就可以了：

@GetMapping(value = "{language}/{country}/{term}/catalogue",produces = {"application/json"})
public @ResponseBody String test(@PathVariable String language,@PathVariable String country,@PathVariable String term) {

        return language+"\t"+country+"\t"+term
    }

您将传递： http://localhost:8080/api/Français/France/fr/catalogue

Answer 5

试试这个：

@RequestMapping(value = "/{lang}/{count}/{term}", method=RequestMethod.GET)
public ResponseEntity<?> getSomething(@PathVariable("lang") String lang, @PathVariable("count") String count, @PathVariable("term") String term) {
   // Your code goes here.
}

Spring多个路径变量

5 个答案: