直接插入排序。
public void sortWithIndex(Integer arr[], int from, int to) {
if (arr == null || to > arr.length - 1||from<0) {
return;
}
for (int i = from + 1; i <= to; i++) {
int temp = arr[i];
int j = i;
for (; j >= from + 1; j--) {
if (temp >= arr[j-1]) {
break;
}
arr[j] = arr[j - 1];
}
arr[j] = temp;
}
}