IDEA+Maven怎么实现简单的demo

<?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>

    <groupId>com.zx</groupId>
    <artifactId>test-api</artifactId>
    <version>1.0-SNAPSHOT</version>
    <!-- 设定除中央仓库(repo1.maven.org/maven2/)外的其他仓库,按设定顺序进行查找. -->
    <repositories>
        <!-- 如有Nexus私服, 取消注释并指向正确的服务器地址. -->
        <repository>
            <id>nexus</id>
            <name>maven2</name>
            <url>私服url</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
                <updatePolicy>daily</updatePolicy>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>nexus</id>
            <name>maven2</name>
            <url>私服url</url>

            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

    <!-- 把本地项目deploy项目到私服 -->
    <distributionManagement>
        <repository>
            <id>releases</id>
            <name>Nexus Release Repository</name>
            <url>私服url</url>
        </repository>
        <snapshotRepository>
            <id>snapshots</id>
            <name>Nexus Snapshot Repository</name>
            <url>私服url</url>
        </snapshotRepository>
    </distributionManagement>


</project>

package com.scut.api;

public interface DemoService {
    String sayHello(String name);
}