问题描述
我正在尝试一个简单的Spring Cloud Task应用程序。我目前正在尝试运行上述应用程序,但最终还是以java.lang.classNotFoundException: com.example.sampletask.demotask.DemoTaskApplication.java
结尾。我正在尝试调整pom.xml
文件,但到目前为止没有任何进展。这是我到目前为止的内容:
应用程序类:
package com.example.sampletask.demotask;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.task.configuration.EnableTask;
import org.springframework.context.annotation.Bean;
@SpringBootApplication
@EnableTask
public class DemoTaskApplication {
@Bean
public CommandLineRunner commandLineRunner() {
return new HelloWorldCommandLineRunner();
}
public static void main(String[] args) {
SpringApplication.run(DemoTaskApplication.class,args);
}
public static class HelloWorldCommandLineRunner implements CommandLineRunner {
public void run(String... arg0) throws Exception {
System.out.println("Hello,World!");
}
}
}
这是我的pom:
<?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>1.5.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example.sampletask</groupId>
<artifactId>demo-task</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo-task</name>
<description>Demo project for Spring Boot</description>
<properties>
<!-- <java.version>11</java.version> -->
<start-class>com.example.sampletask.demotask.DemoTaskApplication.java</start-class>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-task-core</artifactId>
<version>1.2.2.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
我想我也应该添加application.properties:
logging.level.org.springframework.cloud.task=DEBUG
spring.application.name=helloWorld
到目前为止,我尝试几次更改<start-class>
标记的值,但所做的只是更新错误中提到的软件包。任何帮助将不胜感激。
解决方法
我认为您需要从pom.xml的这一行中删除.java
:
<start-class>com.example.sampletask.demotask.DemoTaskApplication.java</start-class>
我建议您转到start.spring.io来生成一个带有最新版本的spring-boot和spring-cloud-task的项目,尽管您pom.xml中的版本现在已经很老了。