Maven-13依赖管理
http://blog.csdn.net/gudong2945/article/details/6733688
Maven-13依赖管理
分类： Maven 2011-08-30 20:27 406人阅读 评论(0) 收藏 举报
maven
Maven提供dependencyManagement元素既能让子模块继承到父模块的依赖配置，又能保证自模块依赖的使用灵活性。（有选择的继承）
可在accout-parent中加入：
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<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.juvenxu.mvnbook.account</groupId>
<artifactId>account-parent</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>Account Parent</name>
<properties>
<springframework.version>2.5.6</springframework.version>
<junit.version>4.7</junit.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
</dependencyManagement>
</project>
子模块继承代码如下：
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<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.juvenxu.mvnbook.account</groupId>
<artifactId>account-parent</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<artifactId>account-email</artifactId>
<name>Account Email</name>
<properties>
<javax.mail.version>1.4.1</javax.mail.version>
<greenmail.version>1.3.1b</greenmail.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>${javax.mail.version}</version>
</dependency>
<dependency>
<groupId>com.icegreen</groupId>
<artifactId>greenmail</artifactId>
<version>${greenmail.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
</build>
</project>
使用继承管理依赖(dependencyManagement)代来的好处
1、代码量减少，不用多次重复声明version等元素。
2、version受父管理，父变则子变，便于修改。
3、dependencyManagement一旦定义，可以复用。
例如想要在另外一个模块中使用如父模块中一样的dependencyManagement的设置。除了复制，还可以导入。如下：
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<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.juvenxu.mvnbook.account</groupId>
<artifactId>account-parent</artifactId>
<version>1.0-SNAPSHOT</version>
<type><span style="color:#ff0000;">pom</span></type>
<scope><span style="color:#ff0000;">import</span></scope>
</dependency>
</dependencies>
</dependencyManagement>
