我已经在IntelliJ community Edition中创建了一个基本的Spring项目,其中包含以下三个文件。
入门级:
package com.learn.spring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class StarterClass {
public static void main(String[] args) {
SpringApplication.run(StarterClass.class,args);
}
}
Hello.java
package com.learning.spring.hello;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class Hello {
@RequestMapping("/hello")
public String hi() {
return "Hello How Are you doing in IntelliJ";
}
}
pom.xml文件:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>SpringProjectIntelliJ28082022</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.14</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.5.14</version>
</plugin>
</plugins>
</build>
</project>
当我运行应用程序时,我的控制台中显示以下内容:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.5.14)
2022-08-28 15:07:36.980 INFO 9408 --- [ main] com.learn.spring.StarterClass : Starting StarterClass using Java 1.8.0_291 on********with PID 9408 (S:\Java_Workspaces\spring\SpringProjectIntelliJ28082022\target\classes started by****in S:\Java_Workspaces\spring\SpringProjectIntelliJ28082022)
2022-08-28 15:07:36.981 INFO 9408 --- [ main] com.learn.spring.StarterClass : No active profile set, falling back to 1 default profile: "default"
2022-08-28 15:07:37.912 INFO 9408 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2022-08-28 15:07:37.932 INFO 9408 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2022-08-28 15:07:37.932 INFO 9408 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.63]
2022-08-28 15:07:38.084 INFO 9408 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2022-08-28 15:07:38.084 INFO 9408 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1071 ms
2022-08-28 15:07:38.382 INFO 9408 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2022-08-28 15:07:38.382 INFO 9408 --- [ main] com.learn.spring.StarterClass : Started StarterClass in 1.739 seconds (JVM running for 2.04)
2022-08-28 15:08:01.308 INFO 9408 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2022-08-28 15:08:01.308 INFO 9408 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2022-08-28 15:08:01.308 INFO 9408 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 0 ms
但是当我打开浏览器并点击localhost:8080/hello时
我看到错误消息网页。x1c 0d1x
请告诉我我哪里做错了。
1条答案
按热度按时间k4ymrczo1#
您的
Starter
和Hello
类位于不同的包中(com.learn.spring
与com.learning.spring.hello
),为了让Spring自动拾取您的Hello
类,它必须与您的Starter
位于同一个包中。如果不同的包是这样设计的,那么您需要告诉Spring使用
ComponentScan
注解来扫描它们: