public Object[][] getParamMatrix() {
// 仅仅去掉队尾没有参数设定的VarSet,尽可能的不遍历
if (rows.size() > 0) {
VarSet vs = rows.get(rows.size() - 1);
while (null != vs) {
if (vs.keys().size() == 0) {
rows.remove(vs);
vs = null;
if (rows.size() > 0)
vs = rows.get(rows.size() - 1);
} else {