(5)Maven快速入门_5maven聚合与继承_scope依赖范围
多个maven项目实现统一管理， maven 插件jar继承自父的maven项目。对maven中jar的版本进行管理。
1、创建一个项目来管理多个maven项目
new ----maven Project
勾选 Create a simple project(skip archetype selection)
next :填写项目信息， packaging 选 pom 。
创建完成后项目目录结构如下：
编辑 pom.xml配置文件
1、maven 聚合： 统一管理多个maven模块项目，统一执行编译 ,清理，安装
需要配置： <modules> </modules> 来管理多个maven项目， （配置完成后，直接点击 此项目的pom.xml 文件右键运行，即可使管理的多个maven项目同时maven install、maven clean 简化了操作）
<!-- (maven的聚合：) 统一管理多个maven模块项目，统一执行编译 ,清理，安装 --> <modules> <!-- 管理处在同一级目录的项目，先回到父目录再找需要管理的目录 --> <module>../dao</module> <module>../service</module> </modules>
2、dao 、service 、controller 项目中 引入的maven jar 统一配置到 extendsagg项目中， 再 dao 、servcie 、controller 中 配置 <parent></parent> 可简化自身项目的pom.xml配置，引入jar的版本也可以统一继承自父项目。
<!-- maven继承自父项目 --> <parent> <groupId>com.inspur.smvc</groupId> <artifactId>extendsagg</artifactId> <version>0.0.1-SNAPSHOT</version> <relativePath>../extendsagg/pom.xml</relativePath> </parent> <!-- 本项目信息 继承父项目 可简化--> <artifactId>controller</artifactId> <packaging>war</packaging> <!-- 添加Spring支持 继承父项目 可简化版--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> </dependency>
3、maven 父项目 extendsagg 项目中pom.xml 中 jar 信息 的版本号 进行统一设置。
<!-- 各个 maven插件 引入的jar的版本统一管理 --> <properties> <spring.version>4.1.7.RELEASE</spring.version> <log4j.version>1.2.17</log4j.version> <junit.version>4.12</junit.version> </properties> <!-- https://mvnrepository.com/artifact/log4j/log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <!-- spring start--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency>
controller maven模块的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> <!-- maven继承自父项目 --> <parent> <groupId>com.inspur.smvc</groupId> <artifactId>extendsagg</artifactId> <version>0.0.1-SNAPSHOT</version> <relativePath>../extendsagg/pom.xml</relativePath> </parent> <!-- 本项目信息 --> <artifactId>controller</artifactId> <packaging>war</packaging> <!-- <name>controller Maven Webapp</name> --> <!-- <url>http://maven.apache.org</url> --> <dependencies> <!-- 引入service --> <dependency> <groupId>com.inspur.smvc</groupId> <artifactId>service</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl --> <dependency> <groupId>javax.servlet.jsp.jstl</groupId> <artifactId>jstl</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <scope>provided</scope> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <scope>provided</scope> </dependency> <!-- 添加Spring支持 --> <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-tx</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>org.springframework</groupId> <artifactId>spring-web</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <finalName>controller</finalName> </build> </project>
dao maven模块的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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <!-- maven继承自父项目 --> <parent> <groupId>com.inspur.smvc</groupId> <artifactId>extendsagg</artifactId> <version>0.0.1-SNAPSHOT</version> <relativePath>../extendsagg/pom.xml</relativePath> </parent> <!-- 本项目信息 --> <artifactId>dao</artifactId> <packaging>jar</packaging> <!-- 注释 <name>dao</name> <url>http://maven.apache.org</url> --> <!-- <build> --> <!-- <resources> --> <!-- 编译之后包含xml --> <!-- <resource> --> <!-- <directory>src/main/java</directory> --> <!-- <includes> --> <!-- <include>**/*.xml</include> --> <!-- </includes> --> <!-- <filtering>true</filtering> --> <!-- </resource> --> <!-- 编译之后包含xml --> <!-- <resource> --> <!-- <directory>src/main/resources</directory> --> <!-- <includes> --> <!-- <include>*.xml</include> --> <!-- </includes> --> <!-- <filtering>true</filtering> --> <!-- </resource> --> <!-- </resources> --> <!-- </build> --> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <!-- https://mvnrepository.com/artifact/log4j/log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/oracle/ojdbc --> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.2.0</version> </dependency> <!-- <dependency> --> <!-- <groupId>commons-dbcp</groupId> --> <!-- <artifactId>commons-dbcp</artifactId> --> <!-- <version>1.2.2</version> --> <!-- </dependency> --> <!-- mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> </dependency> <!-- junit4.12 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> </dependencies> </project>
service maven 模块的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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <!-- maven继承自父项目 --> <parent> <groupId>com.inspur.smvc</groupId> <artifactId>extendsagg</artifactId> <version>0.0.1-SNAPSHOT</version> <relativePath>../extendsagg/pom.xml</relativePath> </parent> <!-- 本项目的maven插件信息 --> <artifactId>service</artifactId> <packaging>jar</packaging> <!-- <name>service</name> --> <!-- <url>http://maven.apache.org</url> --> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <!-- 依赖 dao --> <dependency> <groupId>com.inspur.smvc</groupId> <artifactId>dao</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> </dependency> <!-- spring start--> <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-tx</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>org.springframework</groupId> <artifactId>spring-web</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> </dependency> <!-- spring end --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> </dependencies> </project>
extendsagg maven 父项目统一管理 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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.inspur.smvc</groupId> <artifactId>extendsagg</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>pom</packaging> <!-- (maven的聚合：) 统一管理多个maven模块项目，统一执行编译 ,清理，安装 --> <modules> <!-- 管理处在同一级目录的项目，先回到父目录再找需要管理的目录 --> <module>../dao</module> <module>../service</module> </modules> <!-- 各个 maven插件 引入的jar的版本统一管理 --> <properties> <spring.version>4.1.7.RELEASE</spring.version> <log4j.version>1.2.17</log4j.version> <junit.version>4.12</junit.version> </properties> <dependencyManagement> <dependencies> <!-- dao start --> <!-- https://mvnrepository.com/artifact/log4j/log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/oracle/ojdbc --> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.2.0</version> </dependency> <!-- <dependency> --> <!-- <groupId>commons-dbcp</groupId> --> <!-- <artifactId>commons-dbcp</artifactId> --> <!-- <version>1.2.2</version> --> <!-- </dependency> --> <!-- mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <!-- junit4.12 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> <!-- dao end --> <!-- service start --> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.2</version> </dependency> <!-- spring start--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <!-- service end --> <!-- controller start --> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl --> <dependency> <groupId>javax.servlet.jsp.jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.3.1</version> <scope>provided</scope> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency> <!-- controller end --> </dependencies> </dependencyManagement> </project>
pom.xml中
scope 选项 ：
Compile（默认） 编译 依赖范围 ：编译、测试、运行都有效；
Test 测试 依赖范围 ：仅测试有效；例如 JUnit；
Provided 已提供 依赖范围 ： 编译，测试有效，运行时无效。例如 servlet-api。
System 系统 依赖范围 ： 使用system范围的依赖必须通过systemPath 指定依赖文件的路径。
Import 导入 依赖范围 ： 使用dependencyManagement时候，可以导入依赖配置。
