转：https://blog.csdn.net/cuipeng1019/article/details/80291136
application.porperties中的配置不生效导致改端口后不生效原因，无法加载resource下的资源文件
springboot项目新建后，application.porperties文件放置路径为/springboot01/src/main/resources
但更改端口后
server.port=8081
server.context-path=/springboot01
hello=\u6211\u7231\u4F60
jdbc.url=jdbc://mysql:localhost11
jdbc.username=root
jdbc.password=sa
jdbc.driver=com.mysql.driver
启动仍是8080端口
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\\/ ___)| |_)| | | | | || (_| | ) ) ) )
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:: Spring Boot :: (v1.5.6.RELEASE)
2018-05-12 13:50:12.959 INFO 7604 --- [ main] com.sm.Springboot01Application : Starting Springboot01Application on py2014-PC with PID 7604 (D:\note\springboot01\target\classes started by py2014 in D:\note\springboot01)
2018-05-12 13:50:12.964 INFO 7604 --- [ main] com.sm.Springboot01Application : No active profile set, falling back to default profiles: default
2018-05-12 13:50:13.152 INFO 7604 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7a13f4c: startup date [Sat May 12 13:50:13 CST 2018]; root of context hierarchy
2018-05-12 13:50:15.669 INFO 7604 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8081 (http)
2018-05-12 13:50:15.689 INFO 7604 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-05-12 13:50:15.691 INFO 7604 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.16
2018-05-12 13:50:15.912 INFO 7604 --- [ost-startStop-1] o.a.c.c.C.[.[localhost].[/springboot01] : Initializing Spring embedded WebApplicationContext
2018-05-12 13:50:15.913 INFO 7604 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2766 ms
2018-05-12 13:50:16.298 INFO 7604 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2018-05-12 13:50:16.306 INFO 7604 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-05-12 13:50:16.306 INFO 7604 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-05-12 13:50:16.307 INFO 7604 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-05-12 13:50:16.307 INFO 7604 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-05-12 13:50:17.154 INFO 7604 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7a13f4c: startup date [Sat May 12 13:50:13 CST 2018]; root of context hierarchy
2018-05-12 13:50:17.301 INFO 7604 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/showJdbc]}" onto public java.lang.String com.sm.controller.HelloController.showJdbc()
2018-05-12 13:50:17.302 INFO 7604 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello]}" onto public java.lang.String com.sm.controller.HelloController.say()
2018-05-12 13:50:17.309 INFO 7604 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity
2018-05-12 13:50:17.309 INFO 7604 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-05-12 13:50:17.382 INFO 7604 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-12 13:50:17.383 INFO 7604 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-12 13:50:17.484 INFO 7604 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-12 13:50:18.146 INFO 7604 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-05-12 13:50:18.308 INFO 7604 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-05-12 13:50:18.389 INFO 7604 --- [ main] com.sm.Springboot01Application : Started Springboot01Application in 6.046 seconds (JVM running for 7.371)
2018-05-12 13:50:18.498 INFO 7604 --- [nio-8081-exec-2] o.a.c.c.C.[.[localhost].[/springboot01] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-05-12 13:50:18.499 INFO 7604 --- [nio-8081-exec-2] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-05-12 13:50:18.533 INFO 7604 --- [nio-8081-exec-2] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 34 ms
经过查各种资料，问题得以解决，解决方案为：
第一种办法：
把/springboot01/src/main/resources路径下的application.porperties放置根目录下，即可成功启动。
第二种办法：
Java Build Path ->Source->Excluded置为None
第三种办法
重写WebMvcConfigurerAdapter的addResourceHandlers方法
package com.sm.app;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/**").addResourceLocations("classpath:/");
super.addResourceHandlers(registry);
}
}
三种方法，最终我是用第二种方法解决的，搜了好多资料，最终整理到这些
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作者：cpsmallmonkey
来源：CSDN
原文：https://blog.csdn.net/cuipeng1019/article/details/80291136
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