maven打jar包的那些事
阿新 • • 發佈：2018-11-22
0.前言
打包命令: mvn clean install,常用的 ide 一般都集成了 maven,因此可以更方便的執行 maven 命令.
1.方式一
pom.xml
1 <!-- 包型別 --> 2 <packaging>jar</packaging> 3 4 <dependencies> 5 <!-- ... --> 6 </dependencies> 7 8 <build> 9 <plugins> 10 <plugin>11 <artifactId>maven-assembly-plugin</artifactId> 12 <configuration> 13 <archive> 14 <manifest> 15 <addClasspath>true</addClasspath> 16 <!-- 指定主類,如: 自定義的一個 main 方法--> 17 <mainClass>com.xxx.MyMain</mainClass> 18 </manifest> 19 </archive> 20 <descriptorRefs> 21 <descriptorRef>jar-with-dependencies</descriptorRef> 22 </descriptorRefs> 23 </configuration> 24 <executions> 25 <execution> 26 <id>make-my-jar-with-dependencies</id> 27 <phase>package</phase> 28 <goals> 29 <goal>single</goal> 30 </goals> 31 </execution> 32 </executions> 33 </plugin> 34 <plugin> 35 <groupId>org.apache.maven.plugins</groupId> 36 <artifactId>maven-compiler-plugin</artifactId> 37 <configuration> 38 <source>1.8</source><!-- 原始碼使用的開發版本 --> 39 <target>1.8</target><!-- 需要生成的目標class檔案的編譯版本 --> 40 </configuration> 41 </plugin> 42 </plugins> 43 </build>
生成2個jar包
- test-0.0.1-SNAPSHOT-jar-with-dependencies.jar: 該 jar 包包含此 project 所依賴的 jar(即 <dependencies> 裡面的依賴也打進去了)
- test-0.0.1-SNAPSHOT.jar
2.方式二
pom.xml
1 <!-- 包型別 --> 2 <packaging>jar</packaging> 3 4 <dependencies> 5 <!-- ... --> 6 </dependencies> 7 8 <build> 9 <plugins> 10 <plugin> 11 <groupId>org.apache.maven.plugins</groupId> 12 <artifactId>maven-jar-plugin</artifactId> 13 <configuration> 14 <archive> 15 <manifest> 16 <addClasspath>true</addClasspath> 17 <classpathPrefix>lib/</classpathPrefix><!--指定classpath的字首--> 18 <!-- 指定主類 --> 19 <mainClass>com.xxx.MyMain</mainClass> 20 </manifest> 21 </archive> 22 </configuration> 23 </plugin> 24 25 <plugin> 26 <groupId>org.apache.maven.plugins</groupId> 27 <artifactId>maven-dependency-plugin</artifactId> 28 <executions> 29 <execution> 30 <id>copy-dependencies</id> 31 <phase>prepare-package</phase> 32 <goals> 33 <goal>copy-dependencies</goal> 34 </goals> 35 <configuration> 36 <!--指定outputDirectory--> 37 <outputDirectory>${project.build.directory}/lib</outputDirectory> 38 <!-- 39 <outputDirectory>${project.build.directory}/classes/lib</outputDirectory> 40 Alternatively use ${project.build.directory}/classes/lib as OutputDirectory to integrate all jar-files into the main jar, but then you will need to add custom classloading code to load the jars. 41 --> 42 <overWriteReleases>false</overWriteReleases> 43 <overWriteSnapshots>false</overWriteSnapshots> 44 <overWriteIfNewer>true</overWriteIfNewer> 45 </configuration> 46 </execution> 47 </executions> 48 </plugin> 49 </plugins> 50 </build>
生成 1 個 jar 包和一個 lib 目錄
- test-0.0.1-SNAPSHOT.jar
- lib: 存放此 project 依賴的 jar(即: </dependencies> 中的依賴)
3.補充
dubbo(provider)有 3 種啟動方式(servlet 容器,自建 main 方法,dubbo 官方提供的 main 類).線上環境推薦使用 dubbo 官方提供的 main 類,此時可以這樣打包:
pom.xml
1 <build> 2 <finalName>provider-test</finalName> 3 <resources> 4 <resource> 5 <targetPath>${project.build.directory}/classes</targetPath> 6 <directory>src/main/resources</directory> 7 <filtering>true</filtering> 8 <includes> 9 <include>**/*.xml</include> 10 <include>**/*.properties</include> 11 </includes> 12 </resource> 13 <!-- com.alibaba.dubbo.container.Main --> 14 <resource> 15 <targetPath>${project.build.directory}/classes/META-INF/spring</targetPath> 16 <directory>src/main/resources/spring</directory> 17 <filtering>true</filtering> 18 <includes> 19 <include>spring-context.xml</include> 20 </includes> 21 </resource> 22 </resources> 23 <pluginManagement> 24 <plugins> 25 <!-- 解決Maven外掛在Eclipse內執行了一系列的生命週期引起衝突 --> 26 <plugin> 27 <groupId>org.eclipse.m2e</groupId> 28 <artifactId>lifecycle-mapping</artifactId> 29 <version>1.0.0</version> 30 <configuration> 31 <lifecycleMappingMetadata> 32 <pluginExecutions> 33 <pluginExecution> 34 <pluginExecutionFilter> 35 <groupId>org.apache.maven.plugins</groupId> 36 <artifactId>maven-dependency-plugin</artifactId> 37 <goals> 38 <goal>copy-dependencies</goal> 39 </goals> 40 </pluginExecutionFilter> 41 <action> 42 <ignore /> 43 </action> 44 </pluginExecution> 45 </pluginExecutions> 46 </lifecycleMappingMetadata> 47 </configuration> 48 </plugin> 49 </plugins> 50 </pluginManagement> 51 <plugins> 52 <!-- 打包jar檔案時，配置manifest檔案，加入lib包的jar依賴 --> 53 <plugin> 54 <groupId>org.apache.maven.plugins</groupId> 55 <artifactId>maven-jar-plugin</artifactId> 56 <configuration> 57 <classesDirectory>target/classes/</classesDirectory> 58 <archive> 59 <manifest> 60 <mainClass>com.alibaba.dubbo.container.Main</mainClass> 61 <!-- 打包時 MANIFEST.MF檔案不記錄的時間戳版本 --> 62 <useUniqueVersions>false</useUniqueVersions> 63 <addClasspath>true</addClasspath> 64 <classpathPrefix>lib/</classpathPrefix> 65 </manifest> 66 <manifestEntries> 67 <Class-Path>.</Class-Path> 68 </manifestEntries> 69 </archive> 70 </configuration> 71 </plugin> 72 <plugin> 73 <groupId>org.apache.maven.plugins</groupId> 74 <artifactId>maven-dependency-plugin</artifactId> 75 <executions> 76 <execution> 77 <id>copy-dependencies</id> 78 <phase>package</phase> 79 <goals> 80 <goal>copy-dependencies</goal> 81 </goals> 82 <configuration> 83 <type>jar</type> 84 <includeTypes>jar</includeTypes> 85 <outputDirectory> 86 ${project.build.directory}/lib 87 </outputDirectory> 88 </configuration> 89 </execution> 90 </executions> 91 </plugin> 92 </plugins> 93 </build>
生成一個 jar 包和該 jar 包和一個目錄 lib
4.執行
1 java -jar xxx.jar