关于数据结构的几种常见排序算法（java代码实现）

1.冒泡排序

int[] ints = {1, 5, 3, 755, 34, 63, 26, 4, 75};
        for (int i=0;i<ints.length-1;i++){//排序循环次数
            Boolean flaw=true;
           for (int j=0;j<ints.length-1-i;j++){//每次比较次数
               if(ints[j]>ints[j+1]){
                   flaw=false;
                   int temp=ints[j];
                   ints[j]=ints[j+1];
                   ints[j+1]=temp;
               }
           }
           if (flaw){
               break;
           }
        }
        for (int i:ints) {
            System.out.print(i+" ");
        }

2. 选择排序

int[] ints = {1, 5, 3, 755, -34, -63, 26, 4, 75};
        for (int i=0;i<ints.length-1;i++){
            int min=ints[i];
            int minindex=i;
            for (int j=i+1;j<ints.length;j++){
                if (min>ints[j]){
                    min=ints[j];
                    minindex=j;
                }
            }
            if (i!=minindex){
                ints[minindex]=ints[i];
                ints[i]=min;
            }
        }

3插入排序

int[] ints = {1, 5, 3, 755, -34, -63, 26, 4, -75};
        for (int i=1;i<ints.length;i++){
            int insertindex=i;
            int insertsum=ints[i];
            while (insertindex>0&&insertsum<ints[insertindex-1]){
                ints[insertindex]=ints[insertindex-1];
                insertindex--;
            }
            ints[insertindex]=insertsum;
        }

4.希尔排序

int[] ints = {1, 5, 3, 755, -34, -63, 26, 4, -75};
        for(int gap=ints.length/2;gap>0;gap=gap/2){//gap为步长；插入排序相当于步长为1的希尔排序
        for (int i=gap;i<ints.length;i++){
            int insertindex=i;
            int insertsum=ints[i];
            while (insertindex-gap>=0&&insertsum<ints[insertindex-gap]){
                ints[insertindex]=ints[insertindex-gap];
                insertindex-=gap;
            }
            ints[insertindex]=insertsum;
        }}

5.快速排序

public void sort(int arr,int left,int right){
           if (left>right){
               return;
           }
           int l=left;
           int r=right;
           while (l<r){
               while (arr[r]>=arr[left]) r--;
               while (l<r&&arr[l]<=arr[left]) l--;
               if (r==l){
                   int temp=arr[r];
                   arr[r]=arr[left];
                   arr[left]=temp;
               }else {
                   int temp=arr[r];
                   arr[r]=arr[l];
                   arr[l]=temp;
               }
           }
           sort(arr,left,l-1);
           sort(arr,r+1,right);
        }