下面介绍如果通过JAVA调用RFC我们使用的JAVA工具是SAP

1、下面介绍如果通过JAVA调用RFC。我们使用的JAVA工具是SAP的NWDS（NetWaver Develop Stadio）。基本上可以说，JAVA调用RFC与.NET的实现原理是一样的，都会在调用端，自动生成相应的类，基于SAP提供的工具，很多代码系统会为我们自动生成。1 安装JCO工具以及配置开发环境1）从网上下载JCO工具，地址如下：如果不能下载，请邮件至我，可以共享（chunguangz）2）下载解压后，将JAR文件夹下的librfc32.dll和sapjcorfc.dll拷贝到SYSTEM32目录下3）将JAR文件夹下的sapjco.jar拷贝到开发目录下；4）将以下文件一并拷贝到

2、开发目录下： aii_proxy_rt.jar：NWDS安装目录aii_util_misc.jar：NWDS安装目录SAPmdi.jar： NWDS安装目录2 准备要调用的RFC我们以2个RFC为例，一个只返回文本；一个通过条件返回表结果：RFC一定要定义为Remote-Enabled Module1）返回文本RFC：只在EXPORT定义参数2）通过条件返回表数据的RFC：需要定义IMPORT和TABLE参数3 在NWDS中调用RFC1）打开NWDS，新建JAVA项目：将我们前面提到的4个JAR包，添加到项目中2）在JAVA项目中，添加对RFC的引用：在项目新建SAP Enterprise C

3、onnector，添加对RFC的引用：填写系统链接参数：选中需要引用的RFC，系统将根据RFC的接口格式，自动生成调用类：加载完成后，查看JAVA项目的内容如下：同样的方法，将ZFLIGHTS也添加到项目中来：最终内容结构如下：3）创建类调用RFC：首先，我们创建类JCO_HELLO，来调用ZHELLOW：代码如下：/* * Created on 2010-7-30 * * To change the template for this generated file go to * Window>Preferences>Java>Code Genera

4、tion>Code and Comments */* * author Administrator * * To change the template for this generated type comment go to * Window>Preferences>Java>Code Generation>Code and Comments */import ZHELLO.ZHELLO_PortType;import ZHELLO.Zhellow_Input;import ZHELLO.Zhellow_Output;i

5、mport com.sap.mw.jco.*;import xy.framework.core.*;public class JCO_HELLO public static void main(String args)JCO.Client proxy;proxy = JCO.createClient("202","zhaocg","china001","en","7","00");try/connect to sap syse

6、tmproxy.connect();/define input/output/port_type according to class automatillyZhellow_Input input = new Zhellow_Input();Zhellow_Output output = new Zhellow_Output();ZHELLO_PortType p_type = new ZHELLO_PortType();/set client proxy for PORT_TYPEp_type.messageSpecifier.setJcoClient(proxy);/set output

7、according to input.output = p_type.zhellow(input);String str = output.getStr();System.out.print(str);catch(SystemFaultException e)System.out.print("System failed");catch(ApplicationFaultException e)System.out.print("Application failed");finallyproxy.disconnect();运行代码，查看结果：然后，我们创建

8、类JCO_FLIGHTS，来调用ZFLIGHTS：代码如下：/* * Created on 2010-7-30 * * To change the template for this generated file go to * Window>Preferences>Java>Code Generation>Code and Comments */* * author Administrator * * To change the template for this generated type comment go to * Windo

9、w>Preferences>Java>Code Generation>Code and Comments */import ZFLIGHT.SflightType;import ZFLIGHT.ZFLIGHT_PortType;import ZFLIGHT.Zflights_Input;import ZFLIGHT.Zflights_Output;import ZFLIGHT.util.SflightType_List;import com.sap.mw.jco.*;import xy.framework.c

10、ore.*;public class JCO_FLIGHTS public static void main(String args)JCO.Client proxy;proxy = JCO.createClient("202","zhaocg","china001","en","7","00");try/connect to sap sysetmproxy.connect();/define classes Zflights_Input input =

11、new Zflights_Input();Zflights_Output output = new Zflights_Output();ZFLIGHT_PortType p_type = new ZFLIGHT_PortType();SflightType data = new SflightType();SflightType_List dataList = new SflightType_List();/set client proxy for port_typep_type.messageSpecifier.setJcoClient(proxy);/set input(selection

12、) valueinput.setCarrid("LH");/get data according to INPUToutput = p_type.zflights(input);/Set data to Type_ListdataList = output.get_as_listData();/loop and output the valuesfor(int i = 0; i<dataList.size(); i+)data = new SflightType();data = dataList.getSflightType(i);System.out.print(

13、data.getCarrid();System.out.print(data.getConnid();System.out.print(data.getFldate();System.out.println(data.getPrice();catch(SystemFaultException e)System.out.print("System failed");catch(ApplicationFaultException e)System.out.print("Application failed");finallyproxy.disconnect(

14、);测试运行，结果如下：顺便贴上利用连接池调用RFC的例子：/* * Created on 2010-7-30 * * To change the template for this generated file go to * Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments */* * author Administrator * * To change the template for this generated type comment go to * Windo

15、w&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments */import ZFLIGHT.SflightType;import ZFLIGHT.ZFLIGHT_PortType;import ZFLIGHT.Zflights_Input;import ZFLIGHT.Zflights_Output;import ZFLIGHT.util.SflightType_List;import com.sap.mw.jco.*;import xy.framework.c

16、ore.*;import java.io.*;public class JCO_FLIGHTS_POOL public static void main(String args)String POOL_NAME = "Pool"JCO.Client proxy = null;try/connect to sap sysetmJCO.Pool pool = JCO.getClientPoolManager().getPool(POOL_NAME);if(pool = null)OrderedProperties proper = OrderedProperties.load(

17、"/perties");JCO.addClientPool(POOL_NAME,6,proper);proxy = JCO.getClient(POOL_NAME);/define classes Zflights_Input input = new Zflights_Input();Zflights_Output output = new Zflights_Output();ZFLIGHT_PortType p_type = new ZFLIGHT_PortType();SflightType data = new SflightType();Sflig

18、htType_List dataList = new SflightType_List();/set client proxy for port_typep_type.messageSpecifier.setJcoClient(proxy);/set input(selection) valueinput.setCarrid("LH");/get data according to INPUToutput = p_type.zflights(input);/Set data to Type_ListdataList = output.get_as_listData();/loop and output the valuesfor(int i = 0; i<dataList.size(); i+