无法运行非常干净的Spring Boot项目

Question

我对Java技术非常陌生(通常在NodeJs和PHP上工作，但需要使用Spring Boot)。我只想在Spring MVC上运行'Hello World‘。但我已经花了一天了。我不知道为什么初始化一个项目会很难。

我从https://start.spring.io/构建了一个项目

Project: Marven, LanguageL Java, Spring Boot:2.2.6, Packing: Java, Java: 11
Dependencies: Spring Web WEB, Thymeleaf and Spring Boot DevTools. 

我的mvn -version

Maven home: /usr/local/Cellar/maven/3.6.0/libexec
Java version: 11.0.7, vendor: Oracle Corporation, runtime: /Library/Java/JavaVirtualMachines/jdk-11.0.7.jdk/Contents/Home
Default locale: en_TH, platform encoding: UTF-8
OS name: "mac os x", version: "10.14.5", arch: "x86_64", family: "mac"

我的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 https://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>2.2.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.myproject</groupId>
    <artifactId>front-end-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>front-end-server</name>
    <description>Front End Server</description>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

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

</project>

当我尝试运行它时，总是返回错误，

[INFO] Total time:  0.604 s
[INFO] Finished at: 2020-04-29T23:22:55+07:00
[INFO] ------------------------------------------------------------------------
[WARNING] The requested profile "pom.xml" could not be activated because it does not exist.
[ERROR] Unknown lifecycle phase "mvn". You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/LifecyclePhaseNotFoundException

我也关注了http://cwiki.apache.org/confluence/display/MAVEN/LifecyclePhaseNotFoundException。但它不起作用。

我也尝试了https://crunchify.com/mavenmvn-clean-install-update-project-and-project-clean-options-in-eclipse-ide-to-fix-any-dependency-issue/的解决方案，它不再起作用了。

此外，我还使用Spring Tool Suite4创建了一个新项目(希望得到不同的结果)。它的效果不是很好。

我通常只需要不到30分钟的时间就能开始一个新事物的“你好世界”。但是对于Spring boot，它已经花了我一整天了。

请帮帮我..

Answer 1

您运行的是什么命令？像"mvn干净安装“这样的东西应该可以工作。

Answer 2

进入您的项目文件夹，并在终端中运行此命令。

mvn全新安装-DskipTests

之后，右击你的主程序，点击run as spring boot app。应该能行得通。