Spring Boot 入门问题集合

问题：从start.spring.io导出的入门demo,引入到sts中并不好用下面是错误日志。

main] i.a.hellospringboot.CourseApiApp         : Starting CourseApiApp on johndoe-MacBook-Pro.local with PID 22730 (/Users/johndoe/Documents/workspace-sts-3.8.4.RELEASE/com.myapp.hello-spring-boot/target/classes started by john doe in /Users/johndoe/Documents/workspace-sts-3.8.4.RELEASE/com.myapp.hello-spring-boot)2017-05-02 21:28:29.454  INFO 22730 --- [           main] i.a.hellospringboot.CourseApiApp         : No active profile set, falling back to default profiles: default2017-05-02 21:28:29.552  INFO 22730 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@5427c60c: startup date [Tue May 02 21:28:29 CDT 2017]; root of context hierarchy2017-05-02 21:28:30.838  INFO 22730 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup2017-05-02 21:28:30.917  INFO 22730 --- [           main] i.a.hellospringboot.CourseApiApp         : Started CourseApiApp in 2.122 seconds (JVM running for 2.614)2017-05-02 21:28:30.919  INFO 22730 --- [       Thread-2] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@5427c60c: startup date [Tue May 02 21:28:29 CDT 2017]; root of context hierarchy2017-05-02 21:28:30.920  INFO 22730 --- [       Thread-2] o.s.j.e.a.AnnotationMBeanExporter  : Unregistering JMX-exposed beans on shutdown      

解决方案：
1.添加web依赖
2.添加tomcat依赖
3.清理maven仓库中的冲突的依赖
mvn dependency:purge-local-repository