springboot出现SpringApplication无法导入包的问题

本是古典何须时尚 2022-06-08 10:53 910阅读 0赞

最简单的springboot入门配置，出现SpringApplication无法import包，maven下载jar失败

推荐方法三，可以先试试方法三

[![image][]][image 1]

点开SpringApplication错误

[![image][image 2]][image_image 2]

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

项目右键—>Run As—>Maven clean

然后项目右键—>Maven—>Update Project..

项目右键—>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?  
\[ERROR\] -> \[Help 1\]

这是提示jdk环境不对

[![image][image 3]][image_image 3]

配置jdk路径

[![image][image 4]][image_image 4]

选择jdk路径

[![image][image 5]][image_image 5]

选择jdk文件夹下的jre，并且是选到这个文件，而不是选择同级的jre

更改pom文件,我的jdk是1.8的，所以这里指定跟本地一样的1.8版本

这里1.5.7.RELEASE的springboot是官方推荐的文件版本的

<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>

最后导入junit包，apptest错误也消失

项目右键—>Run As—>Maven clean

然后项目右键—>Maven—>Update Project..

项目右键—>Run As—>Maven install

[image]: /images/20220608/ae9dda0cf6ed4865917c9251c6cf24de.png
[image 1]: https://img-blog.csdn.net/20170923000200276
[image 2]: https://img-blog.csdn.net/20170923000202823
[image_image 2]: /images/20220608/69f15f65c74047c6aeaa1cda2499c452.png
[image 3]: https://img-blog.csdn.net/20170923000208587
[image_image 3]: /images/20220608/c6a731c171a34d02b0ec957656091e9e.png
[image 4]: https://img-blog.csdn.net/20170923000214240
[image_image 4]: /images/20220608/05694e1f42e540ef9c2cc2017d59ed81.png
[image 5]: https://img-blog.csdn.net/20170923000216604
[image_image 5]: /images/20220608/b9e0d1a92c904f67b15c68c193daa70d.png