Spring Boot Controller未映射 [英] Spring Boot Controller not mapping
问题描述
我使用过STS,现在使用的是IntelliJ Ultimate Edition,但仍得到相同的输出.我的控制器未映射,因此显示404错误.我对Spring Framework完全陌生.
I have used STS and now I am using IntelliJ Ultimate Edition but I am still getting the same output. My controller is not getting mapped thus showing 404 error. I am completely new to Spring Framework.
DemoApplication.java
DemoApplication.java
package com.webservice.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
HelloController.java
HelloController.java
package com.webservice.demo;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloController {
@RequestMapping("/hello")
public String sayHello(){
return "Hey";
}
}
控制台输出
com.webservice.demo.DemoApplication : Starting DemoApplication on XFT000159365001 with PID 11708 (started by Mayank Khursija in C:\Users\Mayank Khursija\IdeaProjects\demo)
2017-07-19 12:59:46.150 INFO 11708 --- [ main] com.webservice.demo.DemoApplication : No active profile set, falling back to default profiles: default
2017-07-19 12:59:46.218 INFO 11708 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@238e3f: startup date [Wed Jul 19 12:59:46 IST 2017]; root of context hierarchy
2017-07-19 12:59:47.821 INFO 11708 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8211 (http)
2017-07-19 12:59:47.832 INFO 11708 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-07-19 12:59:47.832 INFO 11708 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.15
2017-07-19 12:59:47.944 INFO 11708 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-07-19 12:59:47.944 INFO 11708 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1728 ms
2017-07-19 12:59:47.987 INFO 11708 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-07-19 12:59:48.510 INFO 11708 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-07-19 12:59:48.519 INFO 11708 --- [ main] o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0
2017-07-19 12:59:48.634 INFO 11708 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8211 (http)
2017-07-19 12:59:48.638 INFO 11708 --- [ main] com.webservice.demo.DemoApplication : Started DemoApplication in 2.869 seconds (JVM running for 3.44)
推荐答案
I too had the similar issue and was able to finally resolve it by correcting the source package structure following this
组件扫描不会扫描您的控制器类.您的Controller类必须在程序包层次结构中嵌套在下面,并嵌套到具有main()方法的主SpringApplication类中,然后才对其进行扫描,并且在Spring Boot启动时,您还应该在控制台输出中看到RequestMappings.
Your Controller classes are not scanned by the Component scanning. Your Controller classes must be nested below in package hierarchy to the main SpringApplication class having the main() method, then only it will be scanned and you should also see the RequestMappings listed in the console output while Spring Boot is getting started.
在Spring Boot 1.5.8.RELEASE上测试
Tested on Spring Boot 1.5.8.RELEASE
但是如果您希望使用自己的包装结构,则可以始终使用@ComponentScan
批注定义basePackages
进行扫描.
But in case you prefer to use your own packaging structure, you can always use the @ComponentScan
annotation to define your basePackages
to scan.
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