Question

我是Spring-boot的初学者；参考一些教程，我已经使用Spring Initializer设置了Spring Boot项目。我试图通过再次下载依赖项来摆脱这个问题，甚至多次创建新项目。

我正在使用Eclipse Neon IDE，在导入import org.springframework.boot.SpringApplication时发现错误。

我删除存储库的次数过多，因此当我刷新\清理项目时，jar会自动自动下载，但是问题仍然存在。

DemoApplication.java

package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {
  public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
  }
}

下面是我的pom.xml

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>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.3.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <start-class>com.example.demo.DemoApplication</start-class>
</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</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-autoconfigure</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>
    </dependency>
</dependencies>

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

Answer 1

尝试这样做，我认为这可以解决

public static void main(final String[] aArgs)
  {
    new SpringApplicationBuilder(DemoApplication.class).run(aArgs);
  }

Answer 2

在Eclipse中：右键单击 Project-> Maven-> Update project 应该起作用

Answer 3

这是日食的问题，我在存储库中发现损坏的jar并将m2e升级到1.8（在Eclipse论坛中找到了解决方案）。升级m2e之后，我删除了我的存储库并重新启动了Eclipse。一切都顺利smooth

Spring Boot Application：-无法解析导入的org.springframework.boot.SpringApplication

3 个答案: