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How to Download and Install SAP Java Connector (SAP JCo)
The SAP Java Connector (SAP JCo) is a development library that enables a Java application to communicate with SAP systems via SAP's RFC protocol. It supports both inbound and outbound RFC communication, as well as various RFC data serialization formats and network protocols. The SAP JCo is available for different platforms and requires a JDK/JRE 8, 11 or 17.
In this article, we will show you how to download and install the SAP JCo for your specific platform.
Step 1: Download the SAP JCo
To download the SAP JCo, you need to log in to the SAP Service Marketplace and access the SAP JCo download software from http://service.sap.com/connectors. If necessary, select the Tools & Services page to display the download page[^1^] [^3^].
Search for Java connector and download the 64-bit Java connector for the appropriate operating system. You only need the 32-bit version of the SAP JCo if you are using a 32-bit Java VM. The 64-bit variant should always be preferred on 64-bit platforms[^4^].
The SDK package of SAP JCo includes the software, documentation, and examples. The SDK archives for Windows and macOS are shipped as a ZIP file embedded in a ZIP file. The SDK archives for the Unix versions of the SAP JCo are shipped as a TGZ file embedded in a ZIP file. Extract the nested archive variant from the downloaded archive first[^4^].
Step 2: Install the SAP JCo
After extracting the content from the nested archive, further installation instructions can be found in the file <instDir>/javadoc/installation.html[^4^]. The installation steps may vary depending on your platform, but generally they involve copying some files into your Java VM or Apache Tomcat lib folder.
For example, on a Windows server, put the sapjco3.jar and sapjco3.dll files in the lib folder of Apache Tomcat[^2^]. On a Linux server, put the sapjco3.jar and libsapjco3.so in the lib folder of Apache Tomcat[^2^].
SAP JCo running on Windows operating systems requires the Microsoft Visual Studio 2013 C/C++ runtime libraries to be installed on the system[^4^].
Step 3: Test the SAP JCo
To test if the SAP JCo is working properly, you can use some of the examples provided in the SDK package. For example, you can run the JCoCheckTool.class to check if your environment is correctly configured for using SAP JCo[^4^]. You can also run some of the sample programs to test your connection to an SAP system.
If you encounter any problems with the SAP JCo, you can report an incident under component BC-MID-CON-JCO[^4^]. You can also refer to the documentation and FAQs for more information and troubleshooting tips.
What is SAP JCo
SAP JCo is a middleware component that allows Java applications to communicate with SAP systems. It implements the SAP's RFC protocol and provides a set of classes and methods to perform RFC calls, handle RFC data, and manage RFC connections. SAP JCo can be used for various purposes, such as:
Calling BAPIs or RFMs from Java applications.
Implementing Java server applications that can be called from ABAP programs.
Integrating SAP data and functionality with other Java-based systems or frameworks.
Developing custom Java connectors or adapters for SAP systems.
SAP JCo is designed to be high-performance, robust, and easy to use. It supports multiple SAP releases and platforms, and handles complex data types and code pages. It also offers features such as connection pooling, load balancing, and security.
How does SAP JCo work
SAP JCo works by establishing a TCP/IP connection between a Java application and an SAP system. The Java application uses the SAP JCo classes and methods to create and execute RFC requests, which are then sent to the SAP system via the connection. The SAP system processes the RFC requests and sends back the RFC responses, which are then received and processed by the Java application.
The RFC requests and responses consist of RFC function modules (RFMs) and their parameters. An RFM is a self-contained unit of logic that can be executed on an SAP system. A parameter is a piece of data that is passed to or from an RFM. Parameters can be of different types, such as simple values, structures, or tables.
SAP JCo provides a set of classes and methods to create and manipulate RFMs and their parameters. For example, the JCoFunction class represents an RFM, and the JCoParameterList class represents a list of parameters. The JCoRepository class provides access to the metadata of RFMs and their parameters, such as their names, types, and descriptions. 061ffe29dd