Java Spring Boot Hello World示例不工作
我已经从下载了spring引导示例 我试了很多次,但一次又一次地出现同样的错误:Java Spring Boot Hello World示例不工作,java,spring-boot,spring-mvc,Java,Spring Boot,Spring Mvc,我已经从下载了spring引导示例 我试了很多次,但一次又一次地出现同样的错误: Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication at com.example.demo.Application.main(Application.java:10) Caused by: java.lang.ClassNotFoundException:
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
at com.example.demo.Application.main(Application.java:10)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
这是我的pom.xml
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>SpringBoot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringBoot</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
也是我的控制器类
package com.example.demo.controller;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
@RestController
@EnableAutoConfiguration
public class HelloWorldController {
@RequestMapping("/hello")
@ResponseBody
public String sayHello() {
return "Hello World Developer!!!";
}
}
在过去的三天里,我一直在挣扎,没有得到任何地方的帮助。
我正在使用Spring工具套件
我是Spring Boot新手,在这里需要帮助将Maven设置为您的路径,然后在命令提示符/terminal下使用以下命令进行尝试: mvn清洁安装 这将在目标文件夹中创建jar文件。 转到目标文件夹并运行java-jar jarName.jar 或 尝试从“项目”选项卡中清理项目, 将所有maven依赖项添加到eclipse构建路径。
然后尝试将其作为java应用程序运行。这是由损坏的Maven存储库引起的 删除
C:\Users\\.m2\repository
下的所有内容
然后进行EclipseMaven更新,它就可以工作了
这就像
spring boot.jar
损坏一样。尝试删除此依赖项spring boot starter tomcat
如何运行该应用程序?我只需在STS中以SpringBoootApp的形式运行该应用程序,或者单击主类中的绿色图标
package com.example.demo.controller;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
@RestController
@EnableAutoConfiguration
public class HelloWorldController {
@RequestMapping("/hello")
@ResponseBody
public String sayHello() {
return "Hello World Developer!!!";
}
}