maven用变量的方法统一管理jar包版本

<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>thinkive.bigdata</groupId>
	<artifactId>thinkive-bigdata-base</artifactId>
	<version>1.0.1-SNAPSHOT</version>
	<properties>
		<junit.junit.version>4.1.1.RELEASE</junit.junit.version> 
	</properties>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>${junit.junit.version}</version>
			<scope>test</scope>
		</dependency>
　　　　　</dependencies>
</project>