SpringがHttpMediaTypeNotAcceptableExceptionをスローしています：URLパスにドットがあるため、受け入れ可能な表現が見つかりませんでした
最終編集
私が見ていたので答えがあまり得られなかったのでこれを調べた後、Springは拡張子のマッチングで奇妙なことをすることがわかりました。このbyNameOrAtlName/myStringHere.1またはこのbyNameOrAtlName/myStringHere.12のようなリクエストを送信しても、byNameOrAtlName/myStringHere.123が原因でbyNameOrAtlName/myStringHere.comと同様に破損しますが、byNameOrAtlName/myStringHere.coは問題ありません。 byNameOrAtlName/myStringHere.cはそうではありません。
要約すると、拡張機能を決定するためにロジックスプリングが使用しているものはわかりませんが、特定の拡張機能では{varName:.+}が回避策の一種として機能しますが、実際に取得するにはドットファイルサフィックスを完全に無効にする必要があるようですその周りに。
Spring 4.1.6を使用する
Springは次の例外をスローしていますorg.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
次のコードがあり、文字列（名前）にピリオドが含まれていない限り、すべて機能します。
@RestController
@RequestMapping(value = "/foo/")
public class Testing{
@RequestMapping(value = "byNameOrAltName/{name:.+}", method = RequestMethod.GET)
@Transactional(readOnly = true)
public Collection<MyDTO> getByNameOrAltNAme(@PathVariable("name") String name) {
return myRepo.getMyDTOsByNameOrAtlName(name);
}
}
これが動作します。 http://localhost:8080/data/foo/byNameOrAtlName/myStringHereが、これを行うと失敗しますhttp://localhost:8080/data/foo/byNameOrAtlName/myStringHere.fluffy
この例外に関する他の回答を読みましたが、いずれも私の事例に当てはまるようには見えませんでした。そして、最初は春がパスにある期間が好きではないという問題だと思っていたので、以前に正規表現.+でそれを修正しましたが、正規表現の有無にかかわらず同じことを試しましたエラー。
Springがこれを投げる理由についてのアイデアはありますか？
[〜＃〜] edit [〜＃〜]
ここに私のデバッグログがあります：
21:32:09,118 DEBUG work.orm.jpa.support.OpenEntityManagerInViewFilter: 161 - Opening JPA EntityManager in OpenEntityManagerInViewFilter
21:32:09,118 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/r2d2/**'
21:32:09,118 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 1 of 11 in additional filter chain; firing Filter: 'SecurityContextPersistenceFilter'
21:32:09,118 DEBUG y.web.context.HttpSessionSecurityContextRepository: 192 - Obtained a valid SecurityContext from SPRING_SECURITY_CONTEXT: 'org.springframework.security.core.context.SecurityContextImpl@3eda7134: Authentication: org.springframework.security.authentication.UsernamePasswordAuthenticationToken@3eda7134: REDACTED
21:32:09,122 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 2 of 11 in additional filter chain; firing Filter: 'WebAsyncManagerIntegrationFilter'
21:32:09,122 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 3 of 11 in additional filter chain; firing Filter: 'HeaderWriterFilter'
21:32:09,122 DEBUG ework.security.web.header.writers.HstsHeaderWriter: 128 - Not injecting HSTS header since it did not match the requestMatcher org.springframework.security.web.header.writers.HstsHeaderWriter$SecureRequestMatcher@518864fd
21:32:09,122 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 4 of 11 in additional filter chain; firing Filter: 'LogoutFilter'
21:32:09,122 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/logout'
21:32:09,122 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 5 of 11 in additional filter chain; firing Filter: 'UsernamePasswordAuthenticationFilter'
21:32:09,122 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 131 - Request 'GET /data/restaurant/supplier/bynameoraltname/quill.com' doesn't match 'POST /login
21:32:09,122 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 6 of 11 in additional filter chain; firing Filter: 'RequestCacheAwareFilter'
21:32:09,122 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 7 of 11 in additional filter chain; firing Filter: 'SecurityContextHolderAwareRequestFilter'
21:32:09,122 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 8 of 11 in additional filter chain; firing Filter: 'AnonymousAuthenticationFilter'
21:32:09,122 DEBUG y.web.authentication.AnonymousAuthenticationFilter: 106 - SecurityContextHolder not populated with anonymous token, as it already contained: 'org.springframework.security.authentication.UsernamePasswordAuthenticationToken@3eda7134: REDACTED
21:32:09,123 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 9 of 11 in additional filter chain; firing Filter: 'SessionManagementFilter'
21:32:09,123 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 10 of 11 in additional filter chain; firing Filter: 'ExceptionTranslationFilter'
21:32:09,123 DEBUG org.springframework.security.web.FilterChainProxy: 324 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 at position 11 of 11 in additional filter chain; firing Filter: 'FilterSecurityInterceptor'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/login.html'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/index.html'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/*/css/**'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/*/fonts/**'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/*/img/**'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/*/lib/**'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/*/vendor/**'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/sales/**'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/registration/termsofservice.html'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/registration/privacypolicy.html'
21:32:09,123 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/restaurantui/useractivation.html**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/restaurantui/index.html'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/basicuseractivation/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/orderconfirmation/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/supplieruseractivation/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/restaurantuseractivation/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/useractivation/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/user/passwordresetrequest'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/user/changepasswordfortoken/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/user/checkpasswordtokenvalidity/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/signup/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/downloads/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/unsubscribe.html'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/restaurant/emailsubscriptions/unsubscribe/**'
21:32:09,124 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/adminui/**'
21:32:09,125 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/admin*'
21:32:09,125 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/confirm/**'
21:32:09,125 DEBUG rk.security.web.util.matcher.AntPathRequestMatcher: 151 - Checking match of request : '/data/restaurant/supplier/bynameoraltname/quill.com'; against '/data/**'
21:32:09,125 DEBUG ity.web.access.intercept.FilterSecurityInterceptor: 218 - Secure object: FilterInvocation: URL: /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116; Attributes: [isAuthenticated()]
21:32:09,125 DEBUG ity.web.access.intercept.FilterSecurityInterceptor: 347 - Previously Authenticated: org.springframework.security.authentication.UsernamePasswordAuthenticationToken@3eda7134: REDACTED
21:32:09,126 DEBUG ingframework.security.access.vote.AffirmativeBased: 65 - Voter: org.springframework.security.web.access.expression.WebExpressionVoter@3b97d645, returned: 1
21:32:09,126 DEBUG ity.web.access.intercept.FilterSecurityInterceptor: 242 - Authorization successful
21:32:09,126 DEBUG ity.web.access.intercept.FilterSecurityInterceptor: 255 - RunAsManager did not change Authentication object
21:32:09,126 DEBUG org.springframework.security.web.FilterChainProxy: 309 - /data/restaurant/supplier/byNameOrAltName/quill.com?_=1434072729116 reached end of additional filter chain; proceeding with original chain
21:32:09,126 DEBUG org.springframework.web.servlet.DispatcherServlet: 861 - DispatcherServlet with name 'Spring MVC Servlet' processing GET request for [/data/restaurant/supplier/byNameOrAltName/quill.com]
21:32:09,126 DEBUG mvc.method.annotation.RequestMappingHandlerMapping: 294 - Looking up handler method for path /restaurant/supplier/byNameOrAltName/quill.com
21:32:09,127 DEBUG mvc.method.annotation.RequestMappingHandlerMapping: 299 - Returning handler method [public Java.util.Collection<com.siftit.webservices.personae.restaurant.dtos.SupplierDTO> com.siftit.webservices.personae.restaurant.RestaurantSupplierWebService.getByNameOrAltNAme(Java.lang.String)]
21:32:09,128 DEBUG k.beans.factory.support.DefaultListableBeanFactory: 248 - Returning cached instance of singleton bean 'restaurantSupplierWebService'
21:32:09,128 DEBUG org.springframework.web.servlet.DispatcherServlet: 947 - Last-Modified value for [/data/restaurant/supplier/byNameOrAltName/quill.com] is: -1
21:32:09,128 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 334 - Found thread-bound EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356] for JPA transaction
21:32:09,128 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 367 - Creating new transaction with name [com.siftit.webservices.security.WebServiceInterceptor.preHandle]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''
21:32:09,128 DEBUG rg.springframework.jdbc.datasource.DataSourceUtils: 153 - Setting JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@624e4a40] read-only
21:32:09,128 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 403 - Exposing JPA transaction as JDBC transaction [org.springframework.orm.jpa.vendor.HibernateJpaDialect$HibernateConnectionHandle@6d32e04]
21:32:09,128 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 334 - Found thread-bound EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356] for JPA transaction
21:32:09,129 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 472 - Participating in existing transaction
21:32:09,129 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 334 - Found thread-bound EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356] for JPA transaction
21:32:09,129 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 472 - Participating in existing transaction
21:32:09,140 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 755 - Initiating transaction commit
21:32:09,140 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 512 - Committing JPA transaction on EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356]
21:32:09,141 DEBUG rg.springframework.jdbc.datasource.DataSourceUtils: 222 - Resetting read-only flag of JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@624e4a40]
21:32:09,141 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 605 - Not closing pre-bound JPA EntityManager after transaction
21:32:09,142 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 334 - Found thread-bound EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356] for JPA transaction
21:32:09,142 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 367 - Creating new transaction with name [com.siftit.webservices.personae.restaurant.RestaurantSupplierWebService.getByNameOrAltNAme]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''
21:32:09,142 DEBUG rg.springframework.jdbc.datasource.DataSourceUtils: 153 - Setting JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@624e4a40] read-only
21:32:09,142 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 403 - Exposing JPA transaction as JDBC transaction [org.springframework.orm.jpa.vendor.HibernateJpaDialect$HibernateConnectionHandle@32689afc]
21:32:09,143 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 334 - Found thread-bound EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356] for JPA transaction
21:32:09,143 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 472 - Participating in existing transaction
21:32:09,143 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 334 - Found thread-bound EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356] for JPA transaction
21:32:09,143 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 472 - Participating in existing transaction
21:32:09,144 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 334 - Found thread-bound EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356] for JPA transaction
21:32:09,144 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 472 - Participating in existing transaction
21:32:09,144 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 334 - Found thread-bound EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356] for JPA transaction
21:32:09,144 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 472 - Participating in existing transaction
21:32:09,146 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 755 - Initiating transaction commit
21:32:09,146 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 512 - Committing JPA transaction on EntityManager [org.hibernate.jpa.internal.EntityManagerImpl@1d65b356]
21:32:09,146 DEBUG rg.springframework.jdbc.datasource.DataSourceUtils: 222 - Resetting read-only flag of JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@624e4a40]
21:32:09,147 DEBUG org.springframework.orm.jpa.JpaTransactionManager: 605 - Not closing pre-bound JPA EntityManager after transaction
21:32:09,147 DEBUG ethod.annotation.ExceptionHandlerExceptionResolver: 134 - Resolving exception from handler [public Java.util.Collection<com.siftit.webservices.personae.restaurant.dtos.SupplierDTO> com.siftit.webservices.personae.restaurant.RestaurantSupplierWebService.getByNameOrAltNAme(Java.lang.String)]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
21:32:09,147 DEBUG k.beans.factory.support.DefaultListableBeanFactory: 248 - Returning cached instance of singleton bean 'globalWebServiceExceptionHandler'
21:32:09,147 DEBUG ethod.annotation.ExceptionHandlerExceptionResolver: 360 - Invoking @ExceptionHandler method: public Java.lang.Object com.siftit.webservices.GlobalWebServiceExceptionHandler.defaultErrorHandler(javax.servlet.http.HttpServletRequest,Java.lang.Exception) throws Java.lang.Exception
21:32:09,155 DEBUG thod.annotation.RequestResponseBodyMethodProcessor: 163 - Written [org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation] as "application/x-msdownload" using [org.springframework.http.converter.StringHttpMessageConverter@214c8f9d]
21:32:09,155 DEBUG org.springframework.web.servlet.DispatcherServlet:1034 - Null ModelAndView returned to DispatcherServlet with name 'Spring MVC Servlet': assuming HandlerAdapter completed request handling
21:32:09,155 DEBUG org.springframework.web.servlet.DispatcherServlet: 996 - Successfully completed request
21:32:09,155 DEBUG ork.security.web.access.ExceptionTranslationFilter: 116 - Chain processed normally
21:32:09,155 DEBUG urity.web.context.SecurityContextPersistenceFilter: 105 - SecurityContextHolder now cleared, as request processing completed
21:32:09,155 DEBUG work.orm.jpa.support.OpenEntityManagerInViewFilter: 186 - Closing JPA EntityManager in OpenEntityManagerInViewFilter
21:32:09,156 DEBUG .springframework.orm.jpa.EntityManagerFactoryUtils: 432 - Closing JPA EntityManager
私のリクエストヘッダーは次のとおりです。
Accept:application/json, text/plain, */*
Accept-Encoding:gzip, deflate, sdch
Accept-Language:en-US,en;q=0.8
Cache-Control:no-cache
Connection:keep-alive
Cookie:JSESSIONID=BLABLABLABLA; subscriptionType=PREMIUM; userType=ROLE_ADMIN
DNT:1
Host:localhost:8080
Pragma:no-cache
Referer:http://localhost:8080/restaurantui/
User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.124 Safari/537.36
Springは、ドットの後の部分をファイルの接尾辞として扱い、実際に必要な応答タイプを判別しようとします。 ここ は、春のコンテンツネゴシエーションに関するまともな記事です。
そのため、Springはコンバーターを見つけることができないコンテンツタイプで結果を表示しようとしています。
これを解決するには、suffixベースのコンテンツネゴシエーションをオフにするようにspringに指示する必要があります。
@Configuration
public class ContentNegotiationConfig extends WebMvcConfigurerAdapter {
@Override
void configureContentNegotiation(final ContentNegotiationConfigurer configurer) {
// Turn off suffix-based content negotiation
configurer.favorPathExtension(false);
}
}
更新：
もう少し掘り下げて、何が起こっているのか説明できると思います。
デフォルトの設定では不明なパスサフィックスは無視されるため、これを説明するには、Springがパスサフィックスが不明であり、PathExtensionContentNegotiationStrategy内のこのコードに要約する方法を知る必要があります。
@Override
protected MediaType handleNoMatch(NativeWebRequest webRequest, String extension)
throws HttpMediaTypeNotAcceptableException {
if (this.useJaf) {
MediaType jafMediaType = JafMediaTypeFactory.getMediaType("file." + extension);
if (jafMediaType != null && !MediaType.APPLICATION_OCTET_STREAM.equals(jafMediaType)) {
return jafMediaType;
}
}
if (!this.ignoreUnknownExtensions) {
throw new HttpMediaTypeNotAcceptableException(getAllMediaTypes());
}
return null;
}
そのため、Java Activation Frameworkがサフィックスの一部を認識し、それらのメディアタイプを返している可能性があります-。c拡張text/xcを返します。これにより例外が発生します。