插入排序(java)

package insert_sort;

import java.util.Random;

/*各类插入排序 

 * ------数据存储范围1~s.length-1-------

 *主要包括

 *直接插入排序

 *折半插入排序

 *希尔排序

 *以下为代码实现,其中折半查找函数是为了供折半插入排序使用 

 */

public class Sort {
/*
 * 折半查找
 */
private static int binarySerach(int s[], int t, int left, int right) {
int mid = 0;
while (left <= right) {
mid = (left + right) / 2;
if (t > s[mid])
left = mid + 1;
if (t < s[mid])
right = mid - 1;
if (t == s[mid])
left = mid + 1;
}
return left;
}
/*
 * 直接插入排序 稳定
 */
private static void insertSort(int s[]) { // 1~s.length-1
int i, j;
for (i = 2; i < s.length; i++) {
int temp = s[i];
for (j = i - 1; j > 0 && s[j] > temp; j--)
s[j + 1] = s[j];
s[j + 1] = temp;
}
}
/*
 * 折半插入排序 稳定
 */
private static void binaryInsertSort(int s[]) { // 1~s.length-1
int i, j, flag;
for (i = 2; i < s.length; i++) {
int temp = s[i];
if (temp < s[i - 1]) { // 发现逆序,去有序队列进行折半查找,直到找到插入的位置
flag = binarySerach(s, temp, 1, i - 1);
for (j = i - 1; j >= flag; j--) {
s[j + 1] = s[j];
}
s[flag] = temp;
}
}
}
/*
 * 希尔排序 不稳定
 */
private static void shellSort(int s[], int dk) {
int i, j, temp;
for (i = dk + 1; i < s.length; i++) {
temp = s[i];
for (j = i - dk; j > 0 && s[j] > temp; j = j - dk) {
s[j + dk] = s[j];
}
s[j + dk] = temp;
}
}
public static void main(String[] args) {
int length = 10;
int[] s = new int[length];
for (int i = 1; i < s.length; i++)
s[i] = new Random().nextInt(40);
// binaryInsertSort(s);
// insertSort(s);
shellSort(s, 1);
for (int i = 1; i < s.length; i++)
System.out.println(s[i]);
}

}