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[英]Spring boot getting (and editing) an entity with multiple path variables
[英]Spring multiple path variables
在我的 Spring 控制器中,我嘗試獲取 3 個路徑變量:
@RequestMapping("{language}/{country}/{term}/catalogue") - @PathVariable String language, @PathVariable String country, @PathVariable String term
不幸的是,這不會被 servlet 識別。
有多種方法可以綁定 URI,例如
@RequestMapping("**/catalogue")
和@RequestMapping("{language}/{country}/catalogue")
都可以工作,但是使用第三個路徑變量它會停止工作。
控制器本身也映射到特定路徑。
路徑變量有限制嗎? 其他通配符(例如@RequestMapping("**"))
是否有可能得到更高的評估? 例如 2 個通配符比 3 個定義的值更具體。 但是通配符應該是實踐中的最后一個匹配選項。
關於出現的錯誤:
首先,使用通配符映射,它們將被匹配。 當我禁用通配符映射時,會拋出org.springframework.web.HttpRequestMethodNotSupportedException
錯誤。
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)
控制器方法:
@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) {
問一下,這里有來自控制器的所有RequestMappings (對不起,我不能在這里發布控制器的完整代碼):
@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")
}
感謝幫助。
嘗試這個。 不要忘記方法參數中路徑變量聲明中的("lang")
@RequestMapping(value = "/{lang}/{count}/{term}", method=RequestMethod.GET)
public ResponseEntity<?> getSomething(@PathVariable("lang") String lang, @PathVariable("count") String count, @PathVariable("term") String term) {
首先,你錯過了/
在年底(斜杠) xyz
控制器的@RequestMapping
(或/
在每一個方法的的beggining @RequestMapping
)。 這是您的 3 路徑變量方法從未被調用的主要原因。
@RequestMapping(value = "{language}/{country}/{term}/catalogue", method = RequestMethod.GET)
但是,一旦你解決了這個問題,我想你可能會遇到另一個問題。 根據 Spring 文檔( 此處鏈接):
當 URL 匹配多個模式時,將使用排序來查找最具體的匹配項。
URI 變量和通配符數量較少的模式被認為更具體。
這意味着當您啟用通配符匹配時,即使您在控制器的@RequestMapping
末尾添加了/
,也不會調用您的 3 路徑變量方法,因為 Spring 認為帶有通配符的方法更具體。
請檢查所有@RequestMapping
是否缺少斜線。 我建議您始終以斜杠開頭,這樣更容易區分代碼中的 URL 映射。
把它放在你的代碼中它會很好用:
@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
}
你會傳入: http://localhost:8080/api/Français/France/fr/catalogue
嘗試這個:
@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.
}
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