从 https://start.spring.io/ 下载后 pom.xml 显示错误

Question

trying to follow a tutorial on developing web application with spring, thymeleaf, hibernate and mysql database. I created the project using https://start.spring.io/ after downloading the zip, pom.xml shows error marking the heading tag

i have ran maven build and maven clean, both is successful but the error still is not going.

//I get the error on the first line with no hint at all

<?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>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>net.codejava</groupId>
    <artifactId>ProductManager</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>ProductManager</name>
    <description>Spring boot CRUD web app Example</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <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>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</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>

</project>

Answer 1

You can try to downgrade your boot version to 2.1.4.RELEASE

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.4.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

OR

update your maven version to the newest one. Download maven

Answer 2

If you are using eclipse then it's eclipse issue,if you can just run the spring project and check whether is it running fine? If it's running then don't worry. Sorry for lot's of assumption as the question is ambiguous.

Answer 3

I have faced same problem in eclipse.The projects generated from start.spring.io didn't have any packaging info jar/war.

<groupId>net.codejava</groupId>
<artifactId>ProductManager</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

Now it is not showing any after adding "packing". Later maven>update project