即使Tomcat服务器似乎已初始化并在localhost:8080中运行,我仍收到“ HTTP状态404 –未找到”。
pom.xml是
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework</groupId>
<artifactId>gs-consuming-rest</artifactId>
<version>0.1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.6.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<!--<scope>provided</scope>-->
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
控制器是
package com.example.demo;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloController {
@RequestMapping("/")
public String hello(){
return "Hello!";
}
}
主要应用代码是
package com.example.demo;
import java.util.Arrays;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
@SpringBootApplication
public class HelloWorldApplication {
public static void main(String[] args) {
SpringApplication.run(HelloWorldApplication.class, args);
}
}
控制台日志:
2019-08-09 19:53:07.161 INFO 13948 --- [ main] com.example.demo.HelloWorldApplication : Starting HelloWorldApplication on DESKTOP-BIMC3QL with PID 13948 (C:\Users\AdharshD\Documents\workspace-sts-3.9.9.RELEASE\HelloWorld\target\classes started by AdharshD in C:\Users\AdharshD\Documents\workspace-sts-3.9.9.RELEASE\HelloWorld)
2019-08-09 19:53:07.164 INFO 13948 --- [ main] com.example.demo.HelloWorldApplication : No active profile set, falling back to default profiles: default
2019-08-09 19:53:07.791 INFO 13948 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-08-09 19:53:07.810 INFO 13948 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-08-09 19:53:07.810 INFO 13948 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.21]
2019-08-09 19:53:07.891 INFO 13948 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-08-09 19:53:07.891 INFO 13948 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 679 ms
2019-08-09 19:53:08.076 INFO 13948 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-08-09 19:53:08.079 INFO 13948 --- [ main] com.example.demo.HelloWorldApplication : Started HelloWorldApplication in 1.211 seconds (JVM running for 1.855)
最佳答案
您缺少spring-boot-starter-web
工件。 Artifact contains告诉Spring Boot扫描软件包(存在主要方法的软件包)及其所有子软件包,以进行配置,组件和控制器的扫描。由于缺少此工件,spring无法注册您的控制器,并抛出404-Not found。