一、步骤说明1、 MRP二次开发类必须继承com.kingdee.eas.mm.planning.app.mrp.MRPStep2、 自己的逻辑实现写在方法：protected Object innerExecute(MRPCalcParam runParam)3、 将二次开发类登记在T_MM_MRPExtendStep表中：FextendedClass varchar(255) 字段表示被扩展的步骤全路径名FextendClass varchar(255) 表示跟随的步骤全路径名FisMergeTransaction int 用于显示异常，一般设置为1FisRunStep int 用于设定一个步骤是否执行，0不执行，1执行
二、举例1、场景：更新本次MRP产生的计划订单的表头字段FReqRemark2、实现类[table]
[tr][td=642]
[tr][td] package com.kingdee.eas.mm.planning.app; import com.kingdee.bos.BOSException;import com.kingdee.eas.common.EASBizException;
import com.kingdee.eas.mm.planning.app.mrp.MRPCalcParam;import com.kingdee.eas.mm.planning.app.mrp.MRPStep;import com.kingdee.eas.util.app.DbUtil;public class UpdatePlannedOrder extends MRPStep { protected String getStepDesc() { return "更新MRP产生的计划订单二次开发字段FReqRemark"; } protected Object innerExecute(MRPCalcParam runParam) throws EASBizException, BOSException { StringBuffer sqlBuf = new StringBuffer(); sqlBuf.append("update t_mm_plannedorder as t0 set (FReqRemark) = ") .append("(select t1.FRemark from T_MM_RequirementPlan as t1 ") .append("where t0.FReqPlanID = t1.FID ") .append("and t0.FCalcID = ? ") //当前运算ID .append(")") ; DbUtil.[i]execute[/i](runParam.getCtx(), sqlBuf.toString(),new Object[]{runParam.getRunLogID()}); return null; }
protected boolean isNeedUpdateProgress() { return false; }}
3、 将二次开发类登记在T_MM_MRPExtendStep表中,执行SQL
[table]
[tr][td=4]
[tr][td][td=584]
[tr][td]INSERT INTO T_MM_MRPExtendStep(FextendedClass, FextendClass,FisMergeTransaction,FisRunStep)
VALUES (‘com.kingdee.eas.mm.planning.app.mrp. MRPOrderGenerator’, ‘com.kingdee.eas.mm.planning.app.UpdatePlannedOrder’,1,1)
说明是
MRPOrderGenerator【生成计划订单】这个步骤下的增加UpdatePlannedOrder这个子步骤。 
