前言

本文例子来源于某个业务团队，本文主要记录在协助他们部署接入sap遇到的问题，且只记录解决问题的答案，不说明原理。

问题实录

1、问题一：Illegal JCo archive “sapjco-1.0.jar”. It is not allowed to rename or repackage the original archive “sapjco3.jar”

解决方案一：手动项目中将sapjco-1.0.jar重名为sapjco3.jar

不过我们没采用这种方案

解决方案二：指定maven的scope为system，形如下

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

然后指定resources，形如下

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring-boot.version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                    <compilerArguments>
                        <extdirs>${project.basedir}/lib</extdirs>
                    </compilerArguments>
                </configuration>
            </plugin>

        </plugins>

        <resources>
            <resource>
                <directory>${project.basedir}/lib</directory>
                <targetPath>BOOT-INF/lib/</targetPath>
                <includes>
                    <include>**/*.jar</include>
                </includes>
            </resource>
            <resource>
                <directory>${project.basedir}/lib</directory>
                <targetPath>BOOT-INF</targetPath>
                <includes>
                    <include>**/*.so</include>
                    <include>**/*.dll</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <!--<targetPath>BOOT-INF/classes/</targetPath>-->
                <includes>
                    <include>**/*.yml</include>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>

这个的作用是将sapjco3.jar打进BOOT-INF/lib/

问题二：java.lang.UnsatisfiedLinkError: no sapjco3 in java.library.path

因为项目是部署到docker里面去，因此本文只写基于docker的解决方案

解决方案如下：

在dockerFile里面指定LD_LIBRARY_PATH环境变量，形如下

FROM adoptopenjdk/openjdk8
VOLUME /tmp
#ENV JAVA_OPTS="-Dcom.sun.management.jmxremote.port=39083 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false"
ENV JAVA_OPTS=""
ENV LD_LIBRARY_PATH /usr/local/lib:$LD_LIBRARY_PATH
COPY localtime /etc/localtime
RUN echo "Asia/Shanghai" > /etc/timezone
COPY hello-biz/target/hello-biz-*.jar app.jar
COPY hello-biz/lib/libsapjco3.so /usr/local/lib/libsapjco3.so
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar" ]

总结

本来不想写这篇，但从业务团队那边了解到，他们当时百度了很久都没找到合适的答案。因此就记录下这篇文章，看下能否对有遇到此问题的朋友提供一点解决思路