Maven War Plugin的问题 - 没有生成类fiels

Question

我有一个像下面的pom文件。

<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.simple.websocket</groupId>
  <artifactId>my-simple-websocket</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>my-simple-websocket Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <build>
    <finalName>my-simple-websocket</finalName>
    <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <compilerVersion>1.8</compilerVersion>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.4</version>
            </plugin>
        </plugins>
  </build>
</project>

当我运行mvn clean install时，它创建了war文件，而不是WEB_INF / classes中的类文件，而是java文件。知道如何解决问题吗？