SAP JCo的Server/Client编程实例

JCo是服务于SAP系统和Java系统的RFC中间件，是用Java实现的API，以Jar包的方式发布。应用灵活，但使用起来相对繁琐，NetWeaver Portal中基于Java的Webdynpro开发环境SAPNetWeaver Developer Studio就是通过JCo连接SAP的。通过一个简单实例，描述一下实现过程，开发环境：Eclipse + ECC，准备好JCo的Jar包。



一、SAP端：



SE37，创建一个RFC，供Java端调用



function zsap_calculate.

*"----------------------------------------------------------------------

*"*"Local interface:

*" IMPORTING

*" VALUE(NUMBER1) TYPE STRING

*" VALUE(NUMBER2) TYPE STRING

*" VALUE(OPERATOR) TYPE STRING

*" EXPORTING

*" VALUE(RESULT) TYPE STRING

*"----------------------------------------------------------------------

try .

case operator.

when '+'.

result = number1 + number2.


when '-'.

result = number1 - number2.


when '*'.

result = number1 * number2.


when '/'.

result = number1 / number2.


when others.

result = 'Not supported!'.

endcase.


catch cx_root.

result = 'Not supported!'.

endtry.


condense result.

endfunction.

SM59配置RFC destination





注意这里要设置为Unicode的communication type





SE37定义Java系统调用的接口函数：





SE38创建测试程序：

report zyincl_test_00 no standard page heading.

data:

l_number1 type string,

l_number2 type string,

l_operator type string,

l_result type string.

l_number1 = '15'.
l_number2 = '221'.
l_operator = '+'.

call function 'ZJ***A_CALCULATE' destination 'JCOPRO001'

exporting

number1 = l_number1

number2 = l_number2

operator = l_operator

importing

result = l_result.

write l_result.


二、Java端：



在Eclipse中创建一个Java Project





把JCo的Jar包配置到项目





创建服务类，处理SAP的请求，记得设置属性Unicode为1：

package org.clyde;

import com.sap.mw.jco.*;

import com.sap.mw.jco.JCO.Client;

import com.sap.mw.jco.JCO.Function;

import com.sap.mw.jco.JCO.ParameterList;

import com.sap.mw.jco.JCO.Repository;

import com.sap.mw.jco.JCO.Server;

public class Service extends Server {

private static Client client;

public Service(String gwhost, String gwserv, String progid, IRepository rep) {

super(gwhost, gwserv, progid, rep);

super.setProperty("unicode", "1");

if (client == null) {

client = JCO.createClient("550", "clyde", "1q2w3e4r", "EN",

"192.168.1.8", "00");

client.connect();

}

}

@Override

//重载方法，处理SAP对Java系统的远程访问

protected void handleRequest(Function function) throws Exception {

ParameterList input = function.getImportParameterList();

ParameterList output = function.getExportParameterList();

String number1, number2, operator, result;

number1 = input.getString("NUMBER1");

number2 = input.getString("NUMBER2");

operator = input.getString("OPERATOR");

if (function.getName().equals("ZJ***A_CALCULATE")) {

//调用SAP系统的RFC：ZSAP_CALCULATE实现计算

result = getResult(number1, number2, operator);

System.out.println("Calculating=> " + number1 + operator + number2

+ " = " + result);

output.setValue(result, "RESULT");

}

}

public String getResult(String number1, String number2, String operator) {

Repository rep = new Repository("", client);

Function func = rep.getFunctionTemplate("ZSAP_CALCULATE").getFunction();

ParameterList input = func.getImportParameterList();

input.setValue(number1, "NUMBER1");

input.setValue(number2, "NUMBER2");

input.setValue(operator, "OPERATOR");

func.setImportParameterList(input);

client.execute(func);

return func.getExportParameterList().getString("RESULT");

}

}



创建启动服务的Client类：

package org.clyde;



importcom.sap.mw.jco.JCO;

importcom.sap.mw.jco.JCO.Client;

importcom.sap.mw.jco.JCO.Repository;



public classJCoClient {

publicstatic void main(String[] args) {

Clientclient = JCO.createClient("550", "clyde","1q2w3e4r", "EN",

"192.168.1.8","00");

client.connect();

Repositoryrep = new JCO.Repository("", client);

//启动服务

newService("192.168.1.8", "sapgw00", "JCOPRO001",rep).start();

System.out.println("Serviceis started.");

}



}



运行JCoClient，启动服务：





回到SAP端，运行测试程序，成功返回结果：





修改参数，再测试几次，在Java端可以监控到请求的日志：