编写pom.xml出现报错multiple root tag和Invalid content was found starting with element

wxr0616

于 2024-03-15 08:03:13 发布

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分类专栏：各种报错文章标签： xml

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报错的代码

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.example</groupId>
  <artifactId>A1</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>Archetype - A1</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>RELEASE</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>
</project>


<dependencies>

<dependency>
  <groupId>org.mybatis</groupId>
  <artifactId>mybatis</artifactId>
  <version>3.5.14</version>
</dependency>
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>8.2.0</version>
</dependency>
<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.12</version>
  <scope>compile</scope>
</dependency>

</dependencies>
<build>
<resources>
  <resource>
    <directory>src/main/java</directory>
    <includes>
      <include>**/*.properties</include>
      <include>**/*.xml</include>
    </includes>
    <filtering>true</filtering>
  </resource>
</resources>
</build>

这段代码中存在两个 <dependencies> 标签和一个 <build> 标签，这导致了"multiple root tag"错误。XML 文件只能有一个根元素。要解决这个问题，需要将所有内容包裹在一个根元素内。

同时XML 结构不符合规范造成Invalid content was found starting with element报错。在pom文件中，<dependencies> 应该出现在<project>元素内，而且我的代码有两个 <dependencies> 部分，这是不正确的，只能有一个 <dependencies> 部分。

修改后，报错消失

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.example</groupId>
    <artifactId>A1</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>Archetype - A1</name>
    <url>http://maven.apache.org</url>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>RELEASE</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.14</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.2.0</version>
        </dependency>
    </dependencies>

    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>
</project>

大家遇到类似的问题可以参考一下。