无法解析org.springframework.context.ConfigurableApplicationContext类型

Question

当我尝试在Spring Tool Suite中创建我的第一个应用程序时,我收到以下错误:

此行中有多个标记 - 无法解析org.springframework.context.ConfigurableApplicationContext类型.它是从所需的.class文件间接引用的 - 来自类型的方法run(Object,String ...)SpringApplication引用了缺少的类型ConfigurableApplicationContext

这是以下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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>

        <groupId>com.welcome</groupId>
        <artifactId>demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>

        <name>welcome</name>
        <description>Demo project for Spring Boot</description>

        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.3.6.RELEASE</version>
            <relativePath/> <!-- lookup parent from repository -->
        </parent>

        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <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-test</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
        </dependencies>

        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    </project>



    This is the Controller Used


    package com.welcome.demo;

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


    @SpringBootApplication
    @EnableAutoConfiguration
    public class WelcomeApplication {

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

任何人都可以帮忙吗？我的错是什么？它在项目文件夹上显示红色感叹号.

Answer 1

您的maven缓存已损坏.要解决此问题,请按照以下步骤操作:

• 在命令行上转到项目的目录.
• 确保您的POM.xml与命令行位于同一目录中

• 运行命令

  mvn dependency:purge-local-repository
  

• 如果您收到构建成功消息,则表示错误已解决.

• 如果仍然存在错误,请删除您的(〜/ .m2/repository/org/springframework)文件夹并运行

  mvn package
  

它现在可以正常工作.