执行mvn compile 报错

你把HelloMaven.java中的内容替换一下：

package com.imooc.app;
public class HelloMaven{
    public static void main(String[] args){
        System.out.println("Hello Maven!!!");
    }
}

替换以后再试下呢~~

祝学习愉快！

package com.imooc.app;

public class HelloMaven

{

public static void main(String[] args){

System.out.println("Hello  Maven !!!");

}

}

pom.xml文件不放那么多内容试试，如下：

<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>com.imooc.app</groupId>
  <artifactId>hellomaven</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>hellomaven</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
<scope>provided</scope>
</dependency>
 </dependencies>
</project>

如果还是不行，可以尝试执行如下命令：mvn install -Drat.skip=true

祝学习愉快！

这是pom.xml, 是按照视频说的找出来的.

<?xml version="1.0" encoding="UTF-8"?>

<!--

Licensed to the Apache Software Foundation (ASF) under one

or more contributor license agreements.  See the NOTICE file

distributed with this work for additional information

regarding copyright ownership.  The ASF licenses this file

to you under the Apache License, Version 2.0 (the

"License"); you may not use this file except in compliance

with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,

software distributed under the License is distributed on an

"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

KIND, either express or implied.  See the License for the

specific language governing permissions and limitations

under the License.

-->

<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.apache.maven</groupId>

    <artifactId>maven</artifactId>

    <version>3.5.0</version>

  </parent>

  <artifactId>maven-model</artifactId>

  <name>Maven Model</name>

  <description>Model for Maven POM (Project Object Model)</description>

  <properties>

    <checkstyle.violation.ignore>FileLength</checkstyle.violation.ignore>

  </properties>

  <dependencies>

    <dependency>

      <groupId>org.codehaus.plexus</groupId>

      <artifactId>plexus-utils</artifactId>

    </dependency>

    <dependency>

      <groupId>org.apache.commons</groupId>

      <artifactId>commons-lang3</artifactId>

    </dependency>

  </dependencies>

  <build>

    <plugins>

      <plugin>

        <groupId>org.codehaus.modello</groupId>

        <artifactId>modello-maven-plugin</artifactId>

        <configuration>

          <version>4.0.0</version>

          <models>

            <model>src/main/mdo/maven.mdo</model>

          </models>

        </configuration>

        <executions>

          <execution>

            <id>standard</id>

            <goals>

              <goal>java</goal>

              <goal>xpp3-reader</goal>

              <goal>xpp3-extended-reader</goal>

              <goal>xpp3-writer</goal>

            </goals>

          </execution>

        </executions>

      </plugin>

      <plugin>

        <groupId>org.apache.maven.plugins</groupId>

        <artifactId>maven-site-plugin</artifactId>

        <configuration>

          <!-- Exclude the navigation file for Maven 1 sites

               as it interferes with the site generation. -->

          <moduleExcludes>

            <xdoc>navigation.xml</xdoc>

          </moduleExcludes>

        </configuration>

      </plugin>

    </plugins>

  </build>

  <profiles>

    <profile>

      <id>all-models</id>

      <build>

        <plugins>

          <plugin>

            <groupId>org.codehaus.modello</groupId>

            <artifactId>modello-maven-plugin</artifactId>

            <executions>

              <execution>

                <id>v3</id>

                <goals>

                  <goal>java</goal>

                  <goal>xpp3-writer</goal>

                  <goal>xpp3-reader</goal>

                  <goal>xsd</goal>

                </goals>

                <configuration>

                  <version>3.0.0</version>

                  <packageWithVersion>true</packageWithVersion>

                </configuration>

              </execution>

            </executions>

          </plugin>

          <plugin>

            <artifactId>maven-jar-plugin</artifactId>

            <executions>

              <execution>

                <phase>package</phase>

                <goals>

                  <goal>jar</goal>

                </goals>

                <configuration>

                  <classifier>all</classifier>

                </configuration>

              </execution>

            </executions>

          </plugin>

        </plugins>

      </build>

    </profile>

  </profiles>

</project>