org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal on project

1.目的

使用maven下载mqtt 相关jar，配置如下

<dependency>
		<groupId>org.eclipse.paho</groupId>
		<artifactId>mqtt-client</artifactId>
		<version>0.2.1</version>
</dependency>
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2.问题

Build errors for anjie31; org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal on project anjie31: Could not resolve dependencies for project anjie31:anjie31:jar:0.0.1-SNAPSHOT: Could not find artifact org.eclipse.paho:mqtt-client:jar:0.4.0 in central (http://repo1.maven.org/maven2)

3.原因

在central仓库找不到。
因为mqtt的包在Spring Plugins Repository

4.解决方案

<repositories>
		<repository>
			<id>Spring Plugins Repository</id>
			<name>Spring Plugins Repository</name>
			<url>http://repo.spring.io/plugins-release/</url>
		</repository>

	</repositories>
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