Spring 启动 - 控制器被识别但 api 未绑定

Question

我的申请中有两个文件。

主 class 文件。

package in.njari.util;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class UtilApplication {

    public static void main(String[] args) {
    SpringApplication.run(UtilApplication.class, args);
    }

}

控制器class.

package in.njari.util.controller;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UtilController {
    @GetMapping("/util")
    public ResponseEntity<?> f(){
        return new ResponseEntity<>("I provide insights.", HttpStatus.OK);
    }
}

我的 application.properties 看起来像：

server.servlet.context-path=/util-service
logging.level.org.springframework.core.io.support=DEBUG
logging.level.org.springframework.context.annotation=DEBUG

这是我的控制台的样子：

 /\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.5.RELEASE)

2022-04-06 11:19:53.819  INFO 57700 --- [           main] in.njari.util.UtilApplication            : Starting UtilApplication on njari-MacBook-Pro.local with PID 57700 (/Users/rajdeep/X/util/target/classes started by rajdeep in /Users/rajdeep/X/util)
2022-04-06 11:19:53.821  INFO 57700 --- [           main] in.njari.util.UtilApplication            : No active profile set, falling back to default profiles: default
2022-04-06 11:19:54.005 DEBUG 57700 --- [           main] o.s.c.a.ClassPathBeanDefinitionScanner   : Identified candidate component class: file [/Users/njari/X/util/target/classes/in/njari/util/src/controller/UtilController.class]
2022-04-06 11:19:54.615  INFO 57700 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2022-04-06 11:19:54.627  INFO 57700 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-04-06 11:19:54.627  INFO 57700 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.31]
2022-04-06 11:19:54.708  INFO 57700 --- [           main] o.a.c.c.C.[.[localhost].[/util-service]  : Initializing Spring embedded WebApplicationContext
2022-04-06 11:19:54.709  INFO 57700 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 830 ms
2022-04-06 11:19:54.861  INFO 57700 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path '/util-service'
2022-04-06 11:19:54.866  INFO 57700 --- [           main] in.njari.util.UtilApplication            : Started UtilApplication in 6.463 seconds (JVM running for 6.993)

我尝试用 url 击中 api ： http://localhost:8080/util-service/util 这会引发 404 错误。

因此，即使控制器被拾取用于组件扫描（根据日志），其中的请求也未映射。不确定为什么会这样。

我怀疑我在这里配置请求的方式有问题！虽然无法确定它到底是什么。

Answer 1

尝试移除

@ComponentScan(basePackages = "in.njari")

注释 @RestController 是一个 java bean，系统会自己识别和初始化，除此之外你的代码似乎可以工作我已经测试过了。

Answer 2

如果您明确要扫描基本包，请使用

@SpringBootApplication(scanBasePackages = "in.njari")

编辑：更新答案w.r.t。你的代码
将 spring-web 依赖项更改为

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

Spring 启动 - 控制器被识别但 api 未绑定

Spring Boot - Controller is recognised but the api is not binded

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