HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
HSSFClientAnchor a = new HSSFClientAnchor(0, 0, 1023, 255, (short)0, 0, (short)0, 0);
HSSFSimpleShape shape1 = patriarch.createSimpleShape(a);
shape1.setShapeType(HSSFSimpleShape.OBJECT_TYPE_LINE);
shape1.setLineStyle(HSSFSimpleShape.LINESTYLE_SOLID) ;