Shell排序,快速排序

這兩種排序方法都是能夠進行大量數據排序的,基本上1000萬的排序是秒出,1億數據,Shell大概要10多秒,快速排序大概在3秒左右。以前的三種排序在10萬數據的時候勉強支持,100萬就算不出了。shell

/**
 * Created by Administrator on 2018-02-17.
 */
public class Sort {
    static final int SIZE = 100000000;
    public static void shellSort(int[] a) {
        int i,j,h;
        int r,temp;
        int x = 0;

        for (r = a.length / 2;r >= 1;r /= 2) {
            for (i = r;i < a.length;i++) {
                temp = a[i];
                j = i - r;
                while (j >= 0 && temp < a[j]) {
                    a[j+r] = a[j];
                    j -= r;
                }
                a[j+r] = temp;
            }
        }
        x++;
//        System.out.print("第" + x + "步排序結果:");
//        for (h = 0;h < a.length;h++) {
//            System.out.print(" " + a[h]);
//        }
//        System.out.print("\n");
    }
   public static void quickSort(int[] arr,int left,int right) {
    int f,t;
    int rtemp,ltemp;
    ltemp = left;
    rtemp = right;
    f = arr[(left+right)/2];
    while (ltemp < rtemp) {
        while (arr[ltemp] < f) {
            ++ltemp;
        }
        while (arr[rtemp] > f) {
            --rtemp;
        }
        if(ltemp <= rtemp) {
            t = arr[ltemp];
            arr[ltemp] = arr[rtemp];
            arr[rtemp] = t;
            --rtemp;
            ++ltemp;
        }
    }
    if (ltemp == rtemp) {
        ltemp++;
    }
    if (left < rtemp) {
        quickSort(arr,left,ltemp-1);
    }
    if (ltemp < right) {
        quickSort(arr,rtemp+1,right);
    }
}
    public static void main(String[] args) {
        int[] shuzu = new int[SIZE];
        int i;
        for (i = 0;i < SIZE;i++) {
            shuzu[i] = (int)(100000 + Math.random() * (100000 + 1));
        }
//        System.out.print("排序前的數組爲:\n");
//        for (i = 0;i < SIZE;i++) {
//            System.out.print(shuzu[i] + " ");
//        }
//        System.out.print("\n");
        shellSort(shuzu);    //快速排序此處調用quickSort(shuzu,0,SIZE-1);
//        System.out.print("排序後的數組爲:\n");
//        for (i = 0;i < SIZE;i++) {
//            System.out.print(shuzu[i] + " ");
//        }
//        System.out.print("\n");
}
}