【tomcat啓動失敗問題】Unable to start embedded Tomcat

啓動spring boot 項目後拋出以下異常:

 1 org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
 2     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
 3     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:536) ~[spring-context-4.3.4.RELEASE.jar!/:4.3.4.RELEASE]
 4     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
 5     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761) [spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
 6     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371) [spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
 7     at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
 8     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186) [spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
 9     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175) [spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
10     at com.jiajian.JerseyTestDemoApplication.main(JerseyTestDemoApplication.java:10) [classes!/:0.0.1-SNAPSHOT]
11     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_91]
12     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_91]
13     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_91]
14     at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_91]
15     at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [jersey-test-demo-0.0.1-SNAPSHOT.war:0.0.1-SNAPSHOT]
16     at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [jersey-test-demo-0.0.1-SNAPSHOT.war:0.0.1-SNAPSHOT]
17     at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [jersey-test-demo-0.0.1-SNAPSHOT.war:0.0.1-SNAPSHOT]
18     at org.springframework.boot.loader.WarLauncher.main(WarLauncher.java:59) [jersey-test-demo-0.0.1-SNAPSHOT.war:0.0.1-SNAPSHOT]
19 Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
20     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:115) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
21     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:82) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
22     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:535) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
23     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:177) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
24     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:164) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
25     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:134) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
26     ... 16 common frames omitted
27 Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardServer[-1]]
28     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.6.jar!/:8.5.6]
29     at org.apache.catalina.startup.Tomcat.start(Tomcat.java:356) ~[tomcat-embed-core-8.5.6.jar!/:8.5.6]
30     at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:96) ~[spring-boot-1.4.2.RELEASE.jar!/:1.4.2.RELEASE]
31     ... 21 common frames omitted
32 Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Tomcat]]
33     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.6.jar!/:8.5.6]
34     at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:791) ~[tomcat-embed-core-8.5.6.jar!/:8.5.6]
35     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.6.jar!/:8.5.6]
36     ... 23 common frames omitted

緣由是由於項目中引用了

<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>

tomcat7依賴中也有此包，形成屢次引用依賴致使的jar包衝突致使的報錯，只需將pom.xml中的幹掉就能夠了，再也不衝突了，就能夠快樂地寫 RESTful風格的API提供給客戶端or服務端調用了， so easy !