不清楚Oauth2.0 的 可以查看我前幾篇博文
2018.4.8 補充 我出現這個原因：是我在資源服務器使用了 如下圖所示
Principal Oauth2.0 提供的獲取用戶信息的方法 使其找到相關信息
配置Oauth2.0 認證服務端的時候UserDetails 配置的時候 繼承的實體類
User 代碼上 經個人測試必須要有這幾個實體類 這里面的信息是Principal 方法里所用到的信息 必須有的 如果沒有會報錯：Principal must not be null
public class User extends SupplyUser {
private String firstName;
private String lastName;
private String email;
private String imageUrl;
private Instant createTime;
@JsonIgnore
private Instant updateTime;
@JsonIgnore
private Set<Role> roles = new HashSet<>();
private Set<GrantedAuthority> authorities = new HashSet<>();
public Set<GrantedAuthority> getAuthorities() {
Set<GrantedAuthority> authorities = new HashSet<>();
for (Role role : this.roles) {
for (Authority authority : role.getAuthorities()) {
authorities.add(new SimpleGrantedAuthority(authority.getValue()));
}
}
return authorities;
}
以上方法都不缺的話 只能使用以下的方法了，但筆者不建議使用刪除包的方法
Zuul 為springCloud 微服務框架 單獨可以使用 非常簡單 可以上網查證
此文只說明如何解決Oauth2.0 和Zuul 包 的沖突
需求：新建一個Oauth2.0 項目 需要在此基礎上進行網關分發 選用的框架為Zuul
遇到的問題 是 一旦導入zuul 的所需包
<dependency> <groupId>org.springframework.cloud</groupId> ------ 》》 沖突 <artifactId>spring-cloud-starter-zuul</artifactId> </dependency>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>Dalston.SR3</spring-cloud.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
運行之后 請求分發接口 就報錯信息
java.lang.IllegalArgumentException: Principal must not be null at org.springframework.util.Assert.notNull(Assert.java:134) ~[spring-core-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.boot.actuate.audit.AuditEvent.<init>(AuditEvent.java:88) ~[spring-boot-actuator-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.actuate.audit.AuditEvent.<init>(AuditEvent.java:64) ~[spring-boot-actuator-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.actuate.security.AuthenticationAuditListener.onAuthenticationSuccessEvent(AuthenticationAuditListener.java:92) ~[spring-boot-actuator-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.actuate.security.AuthenticationAuditListener.onApplicationEvent(AuthenticationAuditListener.java:72) ~[spring-boot-actuator-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.actuate.security.AuthenticationAuditListener.onApplicationEvent(AuthenticationAuditListener.java:35) ~[spring-boot-actuator-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:393) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:347) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.security.authentication.DefaultAuthenticationEventPublisher.publishAuthenticationSuccess(DefaultAuthenticationEventPublisher.java:99) ~[spring-security-core-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter.doFilter(OAuth2AuthenticationProcessingFilter.java:156) ~[spring-security-oauth2-2.0.14.RELEASE.jar:na] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177) ~[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106) ~[spring-boot-actuator-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.15.jar:8.5.15] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_91] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_91] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.15.jar:8.5.15] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]
原因 是 一片老外的博文 給出了解決辦法及原因 限於英語有限 大家可以自己查看一下 1.地址：https://github.com/spring-projects/spring-boot/issues/6447 2. https://stackoverflow.com/questions/38958004/spring-boot-1-4-principal-must-not-be-null-exception
翻譯過來大體是：
當你同時擁有Spring Boot Actuator和Spring Security時，
試圖使用SecurityContextHolder.getContext().getAuthentication()（或@AuthenticationPrincipal在方法簽名中使用）的基於UriTemplate的路由將獲得一個null值。
也就是說Oauth2.0 導入的包和Zuul導入的包下的子包spring-boot-actuator （注意這個包並沒有在ZUUL pom中包 中所體現）同時調用 發生沖突 將這個包移除問題就能解決了
具體解決方法 1.：在zuul 下 添加如下exclusions 標簽移除 即可
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zuul</artifactId>
<exclusions>
<exclusion>
<artifactId>spring-boot-actuator</artifactId>
<groupId>org.springframework.boot</groupId>
</exclusion>
</exclusions>
</dependency>
第二種解決辦法 是開始的時候並不知到spring-boot-actuator 為zuul 下的包， 那如何找到他 我使用的springboot +maven 框架 工具是IDEA
點擊右邊欄Maven Projects--》show Dependence
變成如下界面 可以看出spring-boot-actuator 屬於springZuul 下的子包
找到spring-boot-actuator 右鍵刪除 在點擊右下角的Import
刪除后 pom中依然是這樣
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zuul</artifactId>
<exclusions>
<exclusion>
<artifactId>spring-boot-actuator</artifactId>
<groupId>org.springframework.boot</groupId>
</exclusion>
</exclusions>
</dependency>
補充 ： 以上這種方法不夠科學 后期可能會帶來許多麻煩
我最近 將 ZUUL及EUREKA 注冊 和OAUTH2.0 分開三個小項目 寫 可以避免 許多麻煩 也增加代碼 的規范化
還有就是spring-cloud 已經提供 OAuth2.0 的包 也可以避免 相互沖突
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-oauth2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-security</artifactId>
</dependency>
后期我會寫個 規范 springCloud 和Oauth2.0 整合 及Oauth2.0 資源服務器配置 代碼DEMO