无法解析类型 org.springframework.context.ConfigurableApplicationContext

Question

当我尝试在 Spring 工具套件中创建我的第一个应用程序时，出现以下错误：

Multiple markers at this line - The type org.springframework.context.ConfigurableApplicationContext cannot be resolved. It is indirectly referenced from required .class files - The method run(Object, String...) from thae type SpringApplication refers to the missing type ConfigurableApplicationContext

这是下面的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 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？我的错误是什么？并且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：

在命令行中转到您的项目目录。
确保您的 POM.xml 与您的命令行
运行命令
```
mvn dependency:purge-local-repository
```
如果你收到build successful消息，表示错误已经解决。
如果错误仍然存在，请删除您的 (~/.m2/repository/org/springframework) 文件夹和运行
```
mvn package
```

现在可以正常使用了。

Answer 2

已将 spring-boot-starter-parent 更新到最新版本。为我解决了问题

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

无法解析类型 org.springframework.context.ConfigurableApplicationContext

The type org.springframework.context.ConfigurableApplicationContext cannot be resolved

eclipse

spring-tool-suite

spring-boot