无法初始化类 com.sap.conn.jco.rt.JCoRuntimeFactory

Question

我收到错误

无法初始化类 com.sap.conn.jco.rt.JCoRuntimeFactory

我可以使用 glassfish 在 Windows Server 2003 64x 上运行使用 JCo 的应用程序，请帮忙！

Answer 1

确保您安装了正确版本的 SAP JCo（即 Windows 64 位，而不是 32 位），并且 DLL 位于正确的位置。如果此本机库加载出现问题，Java 类将无法初始化。

Answer 2

就我而言，当我没有将 dll 复制到系统路径时，就会出现此问题。

转到 sapjco3.jar 附带的文档：
sapjco/javadoc/installation.html

Microsoft Windows
There are different distribution packages for various JRE versions and hardware processors available:
sapjco3-ntintel-3.1.7.zip for a 32-bit JRE running on a 32- or 64-bit AMD or INTEL x86 processor
sapjco3-ntamd64-3.1.7.zip for a 64-bit JRE running on a 64-bit AMD or INTEL x86 processor
Prerequisites: JCo 3.1 requires the Microsoft Visual Studio 2013 C/C++ runtime libraries to be installed on the system. If not present, download and install the latest version of the "Visual C++ 2013 Redistributable Package" from Microsoft and choose the package, which corresponds to the used Locale and JVM bit-width (x64 for 64-bit or x86 for 32-bit).
To install JCo for Windows unzip the appropriate distribution package into an own arbitrary directory {sapjco3-install-path}.
Note: Do not copy the sapjco3.dll neither into the {windows-dir}\system32 nor into the {windows-dir}\SysWOW64 directory. This will break the operability of other JCo versions that are already installed on the same system. Furthermore you would risk that the current installation also would not work anymore, if the sapjco3.dll gets replaced in the respective Windows system directory in the future.

Then add {sapjco3-install-path} to the PATH environment variable.
Finally, add {sapjco3-install-path}\sapjco3.jar to your CLASSPATH environment variable.