Maven中使用本地JAR包
在Maven项目中使用本地JAR包有两种方法:
1. 使用system scope
<dependencies> <dependency> <groupId>org.richard</groupId> <artifactId>my-jar</artifactId> <version>1.0</version> <scope>system</scope> <systemPath>${project.basedir}/lib/my-jar.jar</systemPath> </dependency> </dependencies>
system scope引入的包,在使用jar-with-dependencies打包时将不会被包含,可以使用resources将本地包打进jar-with-dependencies
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<finalName>xxx-jar-with-dependencies</finalName>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<resources>
<resource>
<targetPath>lib/</targetPath>
<directory>lib/</directory>
<includes>
<include>**/my-jar.jar</include>
</includes>
</resource>
</resources>
</build>
生成的xxx-jar-with-dependencies.jar中,将会包含lib目录以及my-jar.jar,并且能够被在执行的时候被找到。
有的时候这种方法会实效,比如JDBCDriver在声明的时候Class.forName("xxx.Driver")就会说找不到类,用下面两种方法就可以。
2. 将jar包安装到本地repository中
mvn install:install-file -Dfile=my-jar.jar -DgroupId=org.richard -DartifactId=my-jar -Dversion=1.0 -Dpackaging=jar
3. 添加 in project repository,在新机器上执行时就不用运行mvn install:install-file命令了
<repository> <id>in-project</id> <name>In Project Repo</name> <url>file://${project.basedir}/lib</url> </repository> <dependency> <groupId>org.richard</groupId> <artifactId>my-jar</artifactId> <version>1.0</version> </dependency>
你的jar包及路径必须严格遵循格式:
/groupId/artifactId/version/artifactId-verion.jar
本例中: lib/org/richard/my-jar/1.0/my-jar-1.0.jar