JCo是服務(wù)于SAP系統(tǒng)和Java系統(tǒng)的RFC中間件，是用Java實(shí)現(xiàn)的API，以Jar包的方式發(fā)布。應(yīng)用靈活，但使用起來相對(duì)繁瑣，NetWeaver Portal中基于Java的Webdynpro開發(fā)環(huán)境SAPNetWeaver Developer Studio就是通過JCo連接SAP的。通過一個(gè)簡(jiǎn)單實(shí)例，描述一下實(shí)現(xiàn)過程，開發(fā)環(huán)境：Eclipse + ECC，準(zhǔn)備好JCo的Jar包。

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一、SAP端：

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SE37，創(chuàng)建一個(gè)RFC，供Java端調(diào)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.

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????????when?'-'.

??????????result?=?number1?-?number2.

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????????when?'*'.

??????????result?=?number1?*?number2.

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????????when?'/'.

??????????result?=?number1?/?number2.

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????????when?others.

??????????result?=?'Not?supported!'.

??????endcase.

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????catch?cx_root.

??????result?=?'Not?supported!'.

??endtry.

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??condense?result.

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endfunction.

SM59配置RFC destination

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注意這里要設(shè)置為Unicode的communication type

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SE37定義Java系統(tǒng)調(diào)用的接口函數(shù)：

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SE38創(chuàng)建測(cè)試程序：

report??zyincl_test_00?no?standard?page?heading.

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data:

????l_number1?type?string,

????l_number2?type?string,

????l_operator?type?string,

????l_result?type?string.

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l_number1?=?'15'.

l_number2?=?'221'.

l_operator?=?'+'.

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call?function?'ZJAVA_CALCULATE'?destination?'JCOPRO001'

??exporting

????number1??=?l_number1

????number2??=?l_number2

????operator?=?l_operator

??importing

????result???=?l_result.

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write?l_result.

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二、Java端：

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在Eclipse中創(chuàng)建一個(gè)Java Project

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把JCo的Jar包配置到項(xiàng)目

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創(chuàng)建服務(wù)類，處理SAP的請(qǐng)求，記得設(shè)置屬性Unicode為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
//重載方法，處理SAP對(duì)Java系統(tǒng)的遠(yuǎn)程訪問
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("ZJAVA_CALCULATE")) {


//調(diào)用SAP系統(tǒng)的RFC：ZSAP_CALCULATE實(shí)現(xiàn)計(jì)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");
}


}

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創(chuàng)建啟動(dòng)服務(wù)的Client類：

package org.clyde;

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importcom.sap.mw.jco.JCO;

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

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

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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);

//啟動(dòng)服務(wù)

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

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

}

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}

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運(yùn)行JCoClient，啟動(dòng)服務(wù)：

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回到SAP端，運(yùn)行測(cè)試程序，成功返回結(jié)果：

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修改參數(shù)，再測(cè)試幾次，在Java端可以監(jiān)控到請(qǐng)求的日志：

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