跨域配置如下，Springboot 版本為 2.4.1

///跨域訪問配置@Configurationpublic class CorsConfig { private CorsConfiguration buildConfig() { CorsConfiguration corsConfiguration = new CorsConfiguration(); corsConfiguration.setAllowCredentials(true); //sessionid 多次訪問一致 corsConfiguration.addAllowedOrigin('*'); // 允許任何域名使用 corsConfiguration.addAllowedHeader('*'); // 允許任何頭 corsConfiguration.addAllowedMethod('*'); // 允許任何方法（post、get等） return corsConfiguration; } @Bean public CorsFilter corsFilter() { UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); source.registerCorsConfiguration('/**', buildConfig()); // 對接口配置跨域設置 return new CorsFilter(source); }}

問題：跨域配置無效，訪問接口報如下錯誤

java.lang.IllegalArgumentException: When allowCredentials is true, allowedOrigins cannot contain the special value '*'since that cannot be set on the 'Access-Control-Allow-Origin' response header. To allow credentials to a set of origins, list them explicitly or consider using 'allowedOriginPatterns' instead.at org.springframework.web.cors.CorsConfiguration.validateAllowCredentials(CorsConfiguration.java:453) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.cors.CorsConfiguration.checkOrigin(CorsConfiguration.java:557) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.cors.DefaultCorsProcessor.checkOrigin(DefaultCorsProcessor.java:174) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.cors.DefaultCorsProcessor.handleInternal(DefaultCorsProcessor.java:116) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.cors.DefaultCorsProcessor.processRequest(DefaultCorsProcessor.java:95) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:87) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.2.jar:5.3.2]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.2.jar:5.3.2]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.2.jar:5.3.2]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.2.jar:5.3.2]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.2.jar:5.3.2]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:888) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1597) [tomcat-embed-core-9.0.41.jar:9.0.41]at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.41.jar:9.0.41]at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_60]at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_60]at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.41.jar:9.0.41]at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60]

分析：

由于我是升級了 Springboot 到 2.4.1 版本之后才出現的這個問題，再結合報錯信息提示不能使用*號設置允許的Origin，所以有兩個解決方法。

解決方法：

1、降低 Springboot 版本

<modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent>

2、如果不降低版本，則在跨域設置時使用setAllowedOriginPatterns方法

///跨域訪問配置@Configurationpublic class CorsConfig { private CorsConfiguration buildConfig() { CorsConfiguration corsConfiguration = new CorsConfiguration(); corsConfiguration.setAllowCredentials(true); //sessionid 多次訪問一致 // 允許訪問的客戶端域名 List<String> allowedOriginPatterns = new ArrayList<>(); allowedOriginPatterns.add('*'); corsConfiguration.setAllowedOriginPatterns(allowedOriginPatterns);// corsConfiguration.addAllowedOrigin('*'); // 允許任何域名使用 corsConfiguration.addAllowedHeader('*'); // 允許任何頭 corsConfiguration.addAllowedMethod('*'); // 允許任何方法（post、get等） return corsConfiguration; } @Bean public CorsFilter corsFilter() { UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); source.registerCorsConfiguration('/**', buildConfig()); // 對接口配置跨域設置 return new CorsFilter(source); }}

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