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SAP接口编程 之 JCo3.0系列(03) : Table参数

2016-07-14 17:34 501 查看

Table参数作为export parameter

BAPI_COMPANYCODE_GETDETAIL
是一个适合演示的函数,没有import paramter参数,调用后
COMPANYCODE_GETDETAIL
表参数返回SAP系统中所有公司代码的清单。只包括公司代码ID和公司代码名称两个字段。

JCo中,与表参数相关的两个接口是
JCoTable
JCoRecordMetaDta
,
JCoTable
就是RFM中tabl参数,而
JCoRecordMetaDta
JCoTable
JCoStructure
的元数据。

在.net环境中,我喜欢将IRfcTable转换成DataTable,但Java没有类似的数据结构,所以决定直接在方法中传递JCoTable算了。但为了方便显示,可以考虑使用一个通用代码进行输出:

package jco3.utils;

import com.sap.conn.jco.JCoField;
import com.sap.conn.jco.JCoRecordMetaData;
import com.sap.conn.jco.JCoTable;

public class JCoUtils
{
public static void printJCoTable(JCoTable jcoTable)
{
// header

// JCoRecordMeataData is the meta data of either a structure or a table.
// Each element describes a field of the structure or table.
JCoRecordMetaData tableMeta = jcoTable.getRecordMetaData();
for(int i = 0; i < tableMeta.getFieldCount(); i++){
System.out.print(String.format("%s\t", tableMeta.getName(i)));
}
System.out.println(); // new line

// line items

for(int i = 0; i < jcoTable.getNumRows(); i++){
// Sets the row pointer to the specified position(beginning from zero)
jcoTable.setRow(i);

// Each line is of type JCoStructure
for(JCoField fld : jcoTable){
System.out.print(String.format("%s\t", fld.getValue()));
}
System.out.println();
}
}
}

要点说明

对JCoTable,输出表头和行项目。表头通过获取
JCoTable
的meta-data,然后使用meta-data的
getName
()方法。

JCoRecordMetaData tableMeta = jcoTable.getRecordMetaData();
for(int i = 0; i < tableMeta.getFieldCount(); i++){
System.out.print(String.format("%s\t", tableMeta.getName(i)));
}

JCoTable每一行都是一个
JCoStructure
,可以通过
setRow()
设置指针的位置,然后再遍历各个field:

for(int i = 0; i < jcoTable.getNumRows(); i++){
// Sets the row pointer to the specified position(beginning from zero)
jcoTable.setRow(i);

// Each line is of type JCoStructure
for(JCoField fld : jcoTable){
System.out.print(String.format("%s\t", fld.getValue()));
}
System.out.println();
}

完成输出之后,接下来就是RFM调用:

package jco3.demo5;

import org.junit.Test;
import com.sap.conn.jco.*;
import jco3.utils.JCoUtils;

public class JCoTableDemo
{
public JCoTable getCocdList() throws JCoException
{
/**
* Get company code list in SAP
* using BAPI BAPI_COMPANYCODE_GETLIST.
*
* Since JCoTable is rather flexible, we simply use
* this interface as return value
*/

JCoDestination dest = JCoDestinationManager.getDestination("ECC");
JCoFunction fm = dest.getRepository().getFunction("BAPI_COMPANYCODE_GETLIST");
fm.execute(dest);

JCoTable companies = fm.getTableParameterList().getTable("COMPANYCODE_LIST");

return companies;
}

@Test
public void printCompanies() throws JCoException
{
JCoTable companies = this.getCocdList();
JCoUtils.printJCoTable(companies);
}
}

Table参数作为import parameter

table作为输入参数,主要解决填充table的问题,基本模式如下:

someTable.appendRow();
someTable.setValue("FLDNAME", someValue);

以RFC_READ_TABLE为例,读取SAP USR04表。

package jco3.demo5;

import org.junit.Test;
import com.sap.conn.jco.*;
import jco3.utils.JCoUtils;

public class JCoTableAsImport
{
public JCoTable readTable() throws JCoException
{
/**
* Shows how to process JCoTable (as importing)
*/

JCoDestination dest = JCoDestinationManager.getDestination("ECC");
JCoFunction fm = dest.getRepository().getFunction("RFC_READ_TABLE");

// table we want to query is USR04
// which is user authorization table in SAP
fm.getImportParameterList().setValue("QUERY_TABLE", "USR04");

// output data will be delimited by comma
fm.getImportParameterList().setValue("DELIMITER", ",");

// processing table parameters
JCoTable options = fm.getTableParameterList().getTable("OPTIONS");
// modification date >= 2012.01.01 and <= 2015.12.31
options.appendRow();
options.setValue("TEXT", "MODDA GE '20120101' ");
options.appendRow();
options.setValue("TEXT", "AND MODDA LE '20151231' ");

// We only care about fields of [user id] and [modification date]
String[] outputFields = new String[] {"BNAME", "MODDA"};
JCoTable fields = fm.getTableParameterList().getTable("FIELDS");
int count = outputFields.length;
fields.appendRows(count);
for (int i = 0; i < count; i++){
fields.setRow(i);
fields.setValue("FIELDNAME", outputFields[i]);
}

fm.execute(dest);

JCoTable data = fm.getTableParameterList().getTable("DATA");

return data;
}

@Test
public void printUsers() throws JCoException
{
JCoTable users = this.readTable();
JCoUtils.printJCoTable(users);
}
}

在代码中我们使用了两种方法来插入table的行项目,第一种方法:

JCoTable options = fm.getTableParameterList().getTable("OPTIONS");
// modification date >= 2012.01.01 and <= 2015.12.31
options.appendRow();
options.setValue("TEXT", "MODDA GE '20120101' ");
options.appendRow();
options.setValue("TEXT", "AND MODDA LE '20151231' ");

第二种方法:

String[] outputFields = new String[] {"BNAME", "MODDA"};
JCoTable fields = fm.getTableParameterList().getTable("FIELDS");
int count = outputFields.length;
fields.appendRows(count);
for (int i = 0; i < count; i++){
fields.setRow(i);
fields.setValue("FIELDNAME", outputFields[i]);
}

JCoTable重要方法总结



jcoTable_methods.gif

文/StoneWM(简书作者)
原文链接:http://www.jianshu.com/p/a088510cf965
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