1.版本统一管理

        要实现jar的版本统一管理需要对jar的版本进行设置即<version></version>，如下是一段版本控制的以来配置：

<dependencies>
.................
<dependency>
			<groupId>org.apache.shiro</groupId>
			<artifactId>shiro-all</artifactId>
			<version>${org.apache.shiro.version}</version>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate</artifactId>
			<version>${org.hibernate.version}</version>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>${org.hibernate.version}</version>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-ehcache</artifactId>
			<version>${org.hibernate.version}</version>
		</dependency>

		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-annotations</artifactId>
			<version>3.4.0.GA</version>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-c3p0</artifactId>
			<version>${org.hibernate.version}</version>
		</dependency>

		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-entitymanager</artifactId>
			<version>${org.hibernate.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${org.springframework.version}</version>
		</dependency>
........................
</dependencies>

2.设置版本属性

      1.中的<version></version>的配置均是采用${*.version}的配置的，光这样配置还不能找到具体使用哪个版本的，所以必须在pom.xml中用属性定义这些版本的确切值。配置如下：

<!-- 配置可变版本号 （Hibernate、spring、shiro） -->
	<properties>
		<javax.servlet.version>3.1.0</javax.servlet.version>
		<org.apache.shiro.version>1.2.3</org.apache.shiro.version>
		<org.hibernate.version>3.6.10.Final</org.hibernate.version>
		<org.springframework.version>3.0.2.RELEASE</org.springframework.version>
		<developer.organization><![CDATA[scengine]]></developer.organization>
	</properties>

注意：key要与引用的key保持一致。