Maven pom.xml 添加本地jar包依赖以及打包方法

时间:2021-12-09 10:04:39

Maven项目打包时,如果遇到需要添加本地jar包依赖的时候,可以选择两种方法:

1. 安装到本地仓库

第一种方法比较常规,适用于需要添加的jar包也是由maven项目导出,含有pom文件的时候。只需要将jar包安装到本地maven仓库下,然后添加依赖即可。

(1)安装到本地仓库,执行以下命令(其中的-Dfile/-DgroupId/-DartifactId/-Dversion项根据pom文件内容填写):

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mvn install:install-file -Dfile=xxxxx.jar -DgroupId=xxx.xxx.xxx -DartifactId=xxxxx -Dversion=1.0.0 -Dpackaging=jar

(2)安装之后可以在本地仓库中找到对应的jar包。然后将对应的依赖信息插入到工程的pom文件即可:

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<dependency>
  <groupId>xxx.xxx.xxx</groupId>
  <artifactId>xxxxx</artifactId>
  <version>1.0.0</version>
</dependency>

2. dependency中指定scope="system"和本地jar包路径

这种方法适用于其他方式导出的jar包,jar包中不含有pom信息,从而无法安装进本地仓库的情况。做法是:先配置本地jar包依赖,然后在build时将设置将jar包导出,同时配置manifest。

(1)配置本地jar包依赖(systemPath指向本地jar包路径):

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<dependency>
  <groupId>com.amazonaws</groupId>
  <artifactId>aws-java-sdk-s3</artifactId>
  <version>1.11.0</version>
  <scope>system</scope>
  <systemPath>${project.basedir}/lib/xxx.jar</systemPath>
</dependency>

(2)在<build>的spring-boot-maven-plugin中设置将本地jar包导出到项目最终的依赖库中:

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<plugin>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-maven-plugin</artifactId>
  <configuration>
    <includeSystemScope>true</includeSystemScope>
  </configuration>
</plugin>

(3)如果项目使用maven-jar-plugin插件打包的话,还需要在manifectEntries中添加对应的jar包信息;否则虽然jar包导出了,但是项目生成的MANIFEST.MF文件中没有对应的依赖信息,也会导致运行时找不到对应的class。

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<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-jar-plugin</artifactId>
  <configuration>
    <archive>
      <manifest>
        <addClasspath>true</addClasspath>
        <classpathPrefix>lib/</classpathPrefix>
        <mainClass>XXXX</mainClass>
      </manifest>
      <manifestEntries>
        <Class-Path>./ lib/xxxxx.jar</Class-Path>
      </manifestEntries>
    </archive>
    <outputDirectory>
      ${project.build.directory}/XXXXX
    </outputDirectory>
  </configuration>
</plugin>

(4)最后附上一个项目完整的<build>配置(该配置可以将最终生成的jar包和依赖库、配置文件分开)。

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<build>
  <finalName>XXXXX</finalName>
  <sourceDirectory>src/main/java</sourceDirectory>
  <resources>
    <resource>
      <directory>src/main/resources</directory>
      <targetPath>${project.build.directory}/XXXXX</targetPath>
      <excludes>
        <exclude>**/*.java</exclude>
      </excludes>
    </resource>
  </resources>
 
  <testSourceDirectory>src/test/java</testSourceDirectory>
  <testResources>
    <testResource>
      <directory>src/test/resources</directory>
      <filtering>true</filtering>
      <excludes>
        <exclude>**/*.java</exclude>
      </excludes>
    </testResource>
  </testResources>
 
  <plugins>
    <plugin>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-maven-plugin</artifactId>
      <configuration>
        <includeSystemScope>true</includeSystemScope>
      </configuration>
    </plugin>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-surefire-plugin</artifactId>
      <configuration>
        <skipTests>true</skipTests>
      </configuration>
    </plugin>
 
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-dependency-plugin</artifactId>
      <executions>
        <execution>
          <id>copy-dependencies</id>
          <phase>package</phase>
          <goals>
            <goal>copy-dependencies</goal>
          </goals>
          <configuration>
            <outputDirectory>
              ${project.build.directory}XXXXX/lib
            </outputDirectory>
          </configuration>
        </execution>
      </executions>
    </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <configuration>
          <archive>
            <manifest>
              <addClasspath>true</addClasspath>
              <classpathPrefix>lib/</classpathPrefix>
              <mainClass>xxx.xxx.XXXXX</mainClass>
            </manifest>
            <manifestEntries>
              <Class-Path>./ lib/xxxxx.jar</Class-Path>
            </manifestEntries>
          </archive>
          <outputDirectory>
            ${project.build.directory}/XXXXX
          </outputDirectory>
        </configuration>
      </plugin>
  </plugins>
</build>

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原文链接:https://www.cnblogs.com/strugglion/p/12513956.html