原帖地址:http://blog.csdn.net/beyond667/article/details/8952724
maven是目前流行的項目管理工具,maven會給你帶來非常大的方便。。。好處此處省略1萬字。
本文章並不是完整的maven講解,只是鄙人在項目中所學所感,都寫於此,如果有新的感悟,也會不斷更新。
配置maven也是如此的簡單,下載maven的包,把maven放入環境變量,然後cmd命令提示窗口 輸入 mvn -version或者mvn -v 如果有maven信息說明安裝成功。
下面先介紹不用eclipse時maven的原理,因爲以前都是用sts,自帶的把maven插件都裝好了,但這樣對個人學習maven是非常不利的,啥都端到你面前估計你就會懶得張口了。
maven的安裝包的conf包下有setting.xml文件,此文件爲maven的配置文件,用來定義本地倉庫和遠程倉庫燈基本配置
<localRepository>D:\repo_test</localRepository> 定義本地倉庫
<server><username></username><password></password></server> 用於定義遠程server 這個在項目中會經常看到,我們會在一臺服務器用來發布項目,並把本地的這個文件的<server>設置爲遠程的server,這樣就可以達到項目組的個人跟遠程server jar包共享。
maven的常用命令
- 創建一個簡單的Java工程:mvn archetype:create -DgroupId=com.mycompany.example -DartifactId=Example
- 創建一個java的web工程:mvn archetype:create -DarchetypeGroupId=org.apache.maven.archetypes -DarchetypeArtifactId=maven-archetype-webapp -DgroupId=com.mycompany.app -DartifactId=my-webapp
- 打包:mvn package
- 編譯:mvn compile
- 編譯測試程序:mvn test-compile
- 清空:mvn clean
- 運行測試:mvn test
- 生成站點目錄: mvn site
- 生成站點目錄併發布:mvn site-deploy
- 安裝當前工程的輸出文件到本地倉庫: mvn install
- 安裝指定文件到本地倉庫:mvn install:install-file -DgroupId=<groupId> -DartifactId=<artifactId> -Dversion=1.0.0 -Dpackaging=jar -Dfile=<myfile.jar>
- 查看實際pom信息: mvn help:effective-pom
- 分析項目的依賴信息:mvn dependency:analyze 或 mvn dependency:tree
- 跳過測試運行maven任務: mvn -Dmaven.test.skip=true XXX
- 生成eclipse項目文件: mvn eclipse:eclipse
下面主要介紹我對某幾個的理解,mvn clean 會把項目編譯後的都clean掉,mvn compile 會把java文件編譯爲class文件,mvn install 不僅編譯 還有打包 假如你要install又要跳過測試 mvn install -Dmaven.test.skip=true。當然,如果要集成在eclipse裏,你在eclipse裏只需要把skip test那勾選就行了,不過eclipse也只是在你勾選後把-Dmaven.test.skip設爲true,原理是一樣的。
另外要講的是pom文件, 最後面是我搭的SSH 的一個框架,裏面的jar包基本包括SSH所需要的。
POM關係:
主要爲依賴,繼承,合成
依賴關係:
- <strong> <dependencies>
- <dependency>
- <groupId>junit</groupId>
- <artifactId>junit</artifactId>
- <version>4.0</version>
- <type>jar</type>
- <scope>test</scope>
- <optional>true</optional>
- </dependency>
- ...
- </dependencies>
- </strong>
像這樣的直接‘導入’包的是依賴關係。
還有一種依賴關係也是常見到的
- 告訴maven你只包括指定的項目,不包括相關的依賴。<span style="color:#ff0000;">此因素主要用於解決版本衝突問題
- </span> <dependencies>
- <dependency>
- <groupId>org.apache.maven</groupId>
- <artifactId>maven-embedder</artifactId>
- <version>2.0</version>
- <exclusions>
- <exclusion>
- <groupId>org.apache.maven</groupId>
- <artifactId>maven-core</artifactId>
- </exclusion>
- </exclusions>
- </dependency>
- <span style="color:#ff6666;">表示項目maven-embedder需要項目maven-core,但我們不想引用maven-core
- </span>
繼承關係:
這個也是企業應用必不可少的。一般項目不會只有一個jar包,比如你要發佈一個web應用,會有好多模塊。
- 定義父項目
- <project>
- <modelVersion>4.0.0</modelVersion>
- <groupId>org.codehaus.mojo</groupId>
- <artifactId>my-parent</artifactId>
- <version>2.0</version>
- <packaging>pom</packaging>
- </project>
- packaging 類型,需要pom用於parent和合成多個項目。我們需要增加相應的值給父pom,用於子項目繼承。
- 子項目配置
- <project>
- <modelVersion>4.0.0</modelVersion>
- <parent>
- <groupId>org.codehaus.mojo</groupId>
- <artifactId>my-parent</artifactId>
- <version>2.0</version>
- <relativePath>../my-parent</relativePath>
- </parent>
- <artifactId>my-project</artifactId>
- </project>
- relativePath可以不需要,但是用於指明parent的目錄,用於快速查詢。
- dependencyManagement:
- 用於父項目配置共同的依賴關係,主要配置依賴包相同因素,如版本,scope。
這裏注意此繼承不可以循環,比如a繼承b,b繼承c,c繼承d,d繼承a 這樣是錯誤的。
合成關係:
- 合成(或者多個模塊)
- 一個項目有多個模塊,也叫做多重模塊,或者合成項目。
- 如下的定義:
- <project>
- <modelVersion>4.0.0</modelVersion>
- <groupId>org.codehaus.mojo</groupId>
- <artifactId>my-parent</artifactId>
- <version>2.0</version>
- <modules>
- <module>my-project1<module>
- <module>my-project2<module>
- </modules>
- </project>
完整的ssh 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>
- <groupId>Maven_Demo_02</groupId>
- <artifactId>Maven_Demo_02</artifactId>
- <packaging>war</packaging>
- <version>0.0.1-SNAPSHOT</version>
- <name>Maven_Demo_02 Maven Webapp</name>
- <url>http://maven.apache.org</url>
- <properties>
- <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
- <spring.version>3.1.4.RELEASE</spring.version>
- <hibernate-version>4.1.9.Final</hibernate-version>
- <hibernate-search-version>4.2.0.Beta2</hibernate-search-version>
- <struts-version>2.3.8</struts-version>
- <commons-dbcp-version>1.4</commons-dbcp-version>
- <cglib-version>2.2.2</cglib-version>
- <aspectjweaver-version>1.7.1</aspectjweaver-version>
- <jstl-version>1.2</jstl-version>
- <servlet-version>3.0-alpha-1</servlet-version>
- <jsp-version>2.2.1-b03</jsp-version>
- <guava-version>13.0.1</guava-version>
- <slf4j-nop-version>1.7.2</slf4j-nop-version>
- <log4j-version>1.2.17</log4j-version>
- <junit-version>4.11</junit-version>
- <mysql-connector-version>5.1.22</mysql-connector-version>
- </properties>
- <dependencies>
- <!-- spring start -->
- <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>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-asm</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-beans</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-context</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-context-support</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-core</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-expression</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-instrument-tomcat</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-instrument</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-jdbc</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-jms</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-orm</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-oxm</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-test</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-tx</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-web</artifactId>
- <version>${spring.version}</version>
- </dependency>
- <!-- springs end -->
- <!-- Struts2 required start-->
- <dependency>
- <groupId>org.apache.struts</groupId>
- <artifactId>struts2-core</artifactId>
- <version>${struts-version}</version>
- </dependency>
- <dependency>
- <groupId>org.apache.struts.xwork</groupId>
- <artifactId>xwork-core</artifactId>
- <version>${struts-version}</version>
- </dependency>
- <dependency>
- <groupId>javassist</groupId>
- <artifactId>javassist</artifactId>
- <version>3.12.1.GA</version>
- </dependency>
- <dependency>
- <groupId>ognl</groupId>
- <artifactId>ognl</artifactId>
- <version>3.0.6</version>
- </dependency>
- <dependency>
- <groupId>org.freemarker</groupId>
- <artifactId>freemarker</artifactId>
- <version>2.3.19</version>
- </dependency>
- <dependency>
- <groupId>commons-dbcp</groupId>
- <artifactId>commons-dbcp</artifactId>
- <version>${commons-dbcp-version}</version>
- </dependency>
- <dependency>
- <groupId>commons-logging</groupId>
- <artifactId>commons-logging</artifactId>
- <version>1.1.1</version>
- </dependency>
- <dependency>
- <groupId>commons-lang</groupId>
- <artifactId>commons-lang</artifactId>
- <version>2.6</version>
- </dependency>
- <dependency>
- <groupId>commons-io</groupId>
- <artifactId>commons-io</artifactId>
- <version>2.4</version>
- </dependency>
- <dependency>
- <groupId>commons-fileupload</groupId>
- <artifactId>commons-fileupload</artifactId>
- <version>1.2.2</version>
- </dependency>
- <!-- Struts2 required End -->
- <!-- Hibernate required-->
- <dependency>
- <groupId>org.hibernate</groupId>
- <artifactId>hibernate-core</artifactId>
- <version>${hibernate-version}</version>
- </dependency>
- <dependency>
- <groupId>org.apache.struts</groupId>
- <artifactId>struts2-spring-plugin</artifactId>
- <version>${struts-version}</version>
- <..
- [2013/4/19 15:14:22] paul.zhang: <dependency>
- <groupId>org.apache.struts</groupId>
- <artifactId>struts2-convention-plugin</artifactId>
- <version>${struts-version}</version>
- </dependency>
- <dependency>
- <groupId>org.apache.struts</groupId>
- <artifactId>struts2-json-plugin</artifactId>
- <version>${struts-version}</version>
- </dependency>
- <dependency>
- <groupId>javax.servlet</groupId>
- <artifactId>jstl</artifactId>
- <version>${jstl-version}</version>
- </dependency>
- <dependency>
- <groupId>javax.servlet</groupId>
- <artifactId>servlet-api</artifactId>
- <version>${servlet-version}</version>
- <scope>provided</scope>
- </dependency>
- <dependency>
- <groupId>javax.servlet.jsp</groupId>
- <artifactId>jsp-api</artifactId>
- <version>${jsp-version}</version>
- <scope>provided</scope>
- </dependency>
- <!-- log4j -->
- <!-- <dependency>
- <groupId>log4j</groupId>
- <artifactId>log4j</artifactId>
- <version>${log4j-version}</version>
- </dependency>
- -->
- <!-- JUnit -->
- <dependency>
- <groupId>junit</groupId>
- <artifactId>junit</artifactId>
- <version>${junit-version}</version>
- <scope>test</scope>
- </dependency>
- <dependency>
- <groupId>mysql</groupId>
- <artifactId>mysql-connector-java</artifactId>
- <version>5.1.23</version>
- </dependency>
- <dependency>
- <groupId>org.aspectj</groupId>
- <artifactId>aspectjweaver</artifactId>
- <version>1.6.12</version>
- </dependency>
- <dependency>
- <groupId>org.apache.activemq</groupId>
- <artifactId>activemq-core</artifactId>
- <version>5.7.0</version>
- </dependency>
- <dependency>
- <groupId>javax.mail</groupId>
- <artifactId>mail</artifactId>
- <version>1.4.6</version>
- </dependency>
- </dependencies>
- <build>
- <finalName>Maven_Demo_01</finalName>
- </build>
- </project>