【发布时间】：2017-12-26 13:13:36
【问题描述】：
我刚开始使用 Maven，遇到了一个我无法解决的问题。我的应用程序运行所需的 jar 文件似乎不在类路径中。 Maven 不应该在 mvn 包期间处理这个问题吗？
当我运行 mvn package 时，我得到错误：
[ERROR] /home/dev/Desktop/maventest/my-app/src/main/java/com/mycompany/app/App.java:[79,9] cannot find symbol
symbol: class UpnpService
location: class com.mycompany.app.App
[ERROR] /home/dev/Desktop/maventest/my-app/src/main/java/com/mycompany/app/App.java:[79,39] cannot find symbol
symbol: class UpnpServiceImpl
location: class com.mycompany.app.App
示例代码确实说：“您需要类路径上的 cling-core.jar 及其依赖项（seamless-*.jar 文件）来构建和运行此代码。”
但这不是 maven 应该处理的事情吗？如果没有，我该如何包含这些文件？
这是我的 pom.xml：
<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.mycompany.app</groupId>
<artifactId>my-app</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>my-app</name>
<url>http://maven.apache.org</url>
<repositories>
<repository>
<id>4thline-repo</id>
<url>http://4thline.org/m2</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.fourthline.cling</groupId>
<artifactId>cling-core</artifactId>
<version>2.1.1</version>
</dependency>
</dependencies>
</project>
这是我尝试运行的示例代码：
package com.mycompany.app;
import org.fourthline.cling.model.message.header.STAllHeader;
import org.fourthline.cling.model.meta.LocalDevice;
import org.fourthline.cling.model.meta.RemoteDevice;
import org.fourthline.cling.registry.Registry;
import org.fourthline.cling.registry.RegistryListener;
/**
* Runs a simple UPnP discovery procedure.
*/
public class App {
public static void main(String[] args) throws Exception {
// UPnP discovery is asynchronous, we need a callback
RegistryListener listener = new RegistryListener() {
public void remoteDeviceDiscoveryStarted(Registry registry,
RemoteDevice device) {
System.out.println(
"Discovery started: " + device.getDisplayString()
);
}
public void remoteDeviceDiscoveryFailed(Registry registry,
RemoteDevice device,
Exception ex) {
System.out.println(
"Discovery failed: " + device.getDisplayString() + " => " + ex
);
}
public void remoteDeviceAdded(Registry registry, RemoteDevice device) {
System.out.println(
"Remote device available: " + device.getDisplayString()
);
}
public void remoteDeviceUpdated(Registry registry, RemoteDevice device) {
System.out.println(
"Remote device updated: " + device.getDisplayString()
);
}
public void remoteDeviceRemoved(Registry registry, RemoteDevice device) {
System.out.println(
"Remote device removed: " + device.getDisplayString()
);
}
public void localDeviceAdded(Registry registry, LocalDevice device) {
System.out.println(
"Local device added: " + device.getDisplayString()
);
}
public void localDeviceRemoved(Registry registry, LocalDevice device) {
System.out.println(
"Local device removed: " + device.getDisplayString()
);
}
public void beforeShutdown(Registry registry) {
System.out.println(
"Before shutdown, the registry has devices: "
+ registry.getDevices().size()
);
}
public void afterShutdown() {
System.out.println("Shutdown of registry complete!");
}
};
// This will create necessary network resources for UPnP right away
System.out.println("Starting Cling...");
UpnpService upnpService = new UpnpServiceImpl(listener);
// Send a search message to all devices and services, they should respond soon
upnpService.getControlPoint().search(new STAllHeader());
// Let's wait 10 seconds for them to respond
System.out.println("Waiting 10 seconds before shutting down...");
Thread.sleep(10000);
// Release all resources and advertise BYEBYE to other UPnP devices
System.out.println("Stopping Cling...");
upnpService.shutdown();
}
}
示例代码来自：http://4thline.org/projects/cling/core/manual/cling-core-manual.xhtml#chapter.GettingStarted
非常感谢您的帮助。
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