windows环境报错Could not initialize class com.sap.conn.jco.JCo] with root cause

记录springboot项目引入SAP外部依赖包后遇到的坑
1.刚开始出现打包警告warning:

'dependencies.dependency.systemPath' for com.sap:com.sap.conn.jco.sapjco3:jar should not point at files within the project directory, ${project.basedir}/lib/sapjco3.jar will be unresolvable by dependent projects

贴上原来的依赖内容

        <dependency>
            <groupId>com.sap</groupId>
            <artifactId>com.sap.conn.jco.sapjco3</artifactId>
            <version>IDE</version>
            <scope>system</scope>
            <systemPath>${project.basedir}/lib/sapjco3.jar</systemPath>
        </dependency>
    </dependencies>

解决方案:将"systemPath"中的project.basedir改为pom.basedir’

        <dependency>
            <groupId>com.sap</groupId>
            <artifactId>com.sap.conn.jco.sapjco3</artifactId>
            <version>IDE</version>
            <scope>system</scope>
            <systemPath>${pom.basedir}/lib/sapjco3.jar</systemPath>
        </dependency>
    </dependencies>

2.项目war包放入tomcat下运行,报错找不到类,class not found: com.sap.conn.jco.sapjco3
按照网上资料,在pom文件的build下加入

        <resources>
            <resource>
                <!-- directory 表示取该目录下的文件 -->
                <directory>lib</directory>
                <!--targetPath 指定打包到哪个目录下  默认是放到class目录下-->
                <targetPath>/WEB-INF/lib</targetPath>
                <!-- 取符合格式的所有文件  *代表全部 -->
                <includes>
                    <include>**/*.jar</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
        </resources>

结果还是提示同样的报错,没整出来.
简单粗暴方法:运行后将jar放入WEB-INF/lib目录下解决
正常方法:上传jar包至maven仓库

mvn install:install-file -Dfile=sapjco3.jar -Dpackaging=jar -DgroupId=com.sap -DartifactId=com.sap.conn.jco.sapjco3 -Dversion=IDE

3.打包后报错

Could not initialize class com.sap.conn.jco.JCo] with root cause...

在本机目录下C:\Windows\System32,加上文件sapjco3.dll
文件链接:
https://pan.baidu.com/s/19wObcXb8Lhmt5X02o-DnGA?pwd=k3fq