Connect to SAP in Java for RFC call

1. Create a Java Project first.
2. Add sapjco. jar to the Java Project Build path of the Project (add external Jar ).
3. In the resource manager, place librfc32.dll and sapjcorfc. dll in the root directory of the Project.
4. Compile the Jco program:
Method 1:
Public class SapJco {
Static JCO. Client mConnection = null;
Static JCO. Repository mRepository;
/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
Try {
MConnection = JCO. createClient ("200", // SAP client
"******", // Userid
"*******", // Password
"EN", // language (null for the default language)
"Ip address", // application server host name
"10"); // system number
MConnection. connect ();
JCO. Function function = SapJco. createFunction ("RFC Function name ");
JCO. Table codes = null;
Codes = function. getTableParameterList (). getTable ("ITAB ");

Codes. appendRow ();
Codes. setValue ("9220", "WERK ");
Codes. setValue ("90", "LINE ");
Codes. setvalues ("12345", "AUFNR ");
Codes. setValue ("12", "SERIALNO ");
Codes. setValue ("ss", "WERKNAME ");
Codes. setValue ("x1", "LINETXT ");
Codes. setValue ("33", "XINGHAO ");
Codes. setValue ("21", "NUM1 ");
Codes. setvalues ("093000", "BEGINTIME ");
Codes. setvalues ("103000", "ENDTIME ");
Codes. setValue ("", "DEL ");
MConnection.exe cute (function );

System. out. println (mConnection. getAttributes ());
} Catch (Exception ex ){
Ex. printStackTrace ();
System. exit (1 );
} Finally {
MConnection. disconnect ();
}
}
Public static JCO. Function createFunction (String name) throws Exception {
MRepository = new JCO. Repository ("ARAsoft", mConnection );
Try {
IFunctionTemplate ft = mRepository. getFunctionTemplate (name
. ToUpperCase ());
If (ft = null)
Return null;
Return ft. getFunction ();
} Catch (Exception ex ){
Throw new Exception ("Problem retrieving JCO. Function object .");
}
}
}

Method 2:
Put the logon. properties file in the directory where the compiled file is located,
The file content is as follows:
Jco. client. client = 200
Jco. client. user = *****
Jco. client. passwd = ****
Jco. client. ashost = IP Address
Jco. client. sysnr = 10

Java File Content
Public class TestJco {
Static final String POOL_NAME = "Pool ";
Public static void main (String [] arg ){
JCO. Pool pool = JCO. getClientPoolManager (). getPool (TestJco. POOL_NAME );
JCO. Client mConn = null;
OrderedProperties logonProperties = null;
Try {
LogonProperties =
OrderedProperties. load ("logon. properties ");
}
Catch (Exception ie ){
System. out. println ("cannot read the configuration file! ");
}

If (pool = null ){
JCO. addClientPool (TestJco. POOL_NAME, // pool name
5, // maximum number of connections
LogonProperties); // properties
}
MConn = JCO. getClient (TestJco. POOL_NAME );

JCO. Repository mRepository;
MRepository = new JCO. Repository ("ARAsoft", mConn );

Try {
IFunctionTemplate ft =
MRepository. getFunctionTemplate ("BAPI_COMPANYCODE_GETLIST ");

JCO. Function fun = ft. getFunction ();

MConn.exe cute (fun );

}
Catch (Exception ex ){
System. out. println ("error in generating RFC Funtion! ");
}

System. out. println (mConn. getAttributes ());
JCO. releaseClient (mConn );
}
}