最簡單的springboot入門配置，出現SpringApplication無法import包，maven下載jar失敗

推薦方法三，可以先試試方法三

點開SpringApplication錯誤

1.

找到C:\Users\lenovo\.m2\repository\org\springframework\boot下面的spring-boot-autoconfigure，把他刪除

專案右鍵—>Run As—>Maven clean

然後專案右鍵—>Maven—>Update Project..

專案右鍵—>Run As—>Maven install

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project springboot: Compilation failure
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
[ERROR] -> [Help 1]

這是提示jdk環境不對

2.

配置jdk路徑

選擇jdk路徑

選擇jdk資料夾下的jre，並且是選到這個檔案，而不是選擇同級的jre

3.

更改pom檔案,我的jdk是1.8的，所以這裡指定跟本地一樣的1.8版本

這裡1.5.7.RELEASE的springboot是官方推薦的檔案版本的

<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.ma.springboot</groupId>
    <artifactId>springboot</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot</name>
    <url>http://
 
maven.apache.org</url>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>
    <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.7.RELEASE</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

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

最後匯入junit包，apptest錯誤也消失

專案右鍵—>Run As—>Maven clean

然後專案右鍵—>Maven—>Update Project..

專案右鍵—>Run As—>Maven install