【文件属性】：
文件名称：多种排序方法实现的排序器
文件大小：15KB
文件格式：JAR
更新时间：2014-04-23 06:38:25
java排序器
//插入排序
List insertSort(List list){
for(int i = 2;i <= list.getLength(); i ++){
list.getList()[0] = list.getList()[i];//复制为哨兵
int j;
for(j = i-1;other.lower(list.getList()[0],list.getList()[j]);j -- ){
list.getList()[j + 1] = list.getList()[j];
}//记录后移
list.getList()[j + 1] = list.getList()[0];//插入到正确位置
}
return list;
}
//折半插入排序
List BInsertSort(List list){
for(int i = 2; i <= list.getLength(); i ++){
list.getList()[0] = list.getList()[i];//暂存，不是哨兵作用了
int low = 1,high = i -1;
while(low <= high){//折半查找要插入的位置
int m = (low + high) / 2;
if(other.lower(list.getList()[0],list.getList()[m])) high = m - 1;
else low = m + 1;
}
for(int j = i -1; j >= high + 1; j --){
list.getList()[j +1] = list.getList()[j];//记录后移
}
list.getList()[high + 1] = list.getList()[0];
}
return list;
}
//希尔排序
List shellSort(List list,int t){
int[] temp = new int[t];//增量数组
for(int i = t - 1,j = 1; i >= 0 ; i --,j += 2){
temp [i] = j;
}//构造增量数组，确保最后一个元素值为1
for(int k = 0; k < t; k ++){
shellInsert(list,temp[k]);//增量为temp[k]
}
return list;
}
//一趟的希尔排序
void shellInsert(List list,int k){
//对顺序表作一趟希尔插入排序
for(int i = k + 1; i <= list.getLength(); i ++){
list.getList()[0] = list.getList()[i];//暂存，不作哨兵
int j;
for(j = i - k; j > 0 && other.lower(list.getList()[0],list.getList()[j]); j -= k){
list.getList()[j + k] = list.getList()[j];//记录后移
}
list.getList()[j + k] = list.getList()[0];
}
//return list;
}
//冒泡排序
List bubbleSort(List list){
boolean change = true;//一个交换标志，当为false时，表示已排序好
int temp;
for(int i = list.getLength();i >= 2 && change; i --){
change = false;
for(int j = 1; j < i; j ++ ){
if(other.lower(list.getList()[j + 1], list.getList()[j])){//两个元素逆序,交换
temp = list.getList()[j + 1];
list.getList()[j + 1] = list.getList()[j];
list.getList()[j] = temp;
change = true;
}
}
}
return list;
}
//快速排序
List quickSort(List list){
return QSort(list,1,list.getLength());
}
//交换list子表的记录，使枢轴记录到位，并返回此位，在此位之前的记录均小于它，之后的记录均大于它
int partition(List list,int low,int high){
list.getList()[0] = list.getList()[low];//用子表第一个元素作枢轴,0元素为暂存枢轴
int pivotKey = list.getList()[low];
while(low < high){
while(low < high && list.getList()[high] >= pivotKey) -- high;
list.getList()[low] = list.getList()[high];
while(low < high && list.getList()[low] <= pivotKey) ++ low;
list.getList()[high] = list.getList()[low];
}
list.getList()[low] = list.getList()[0];
return low;
}
//递归形式
List QSort(List list,int low,int high){
int pivotKey;
if(low < high){
pivotKey = partition(list,low,high);
QSort(list,low,pivotKey - 1);//递归
QSort(list,pivotKey + 1, high);
}
return list;
}
//简单选择排序
List selectSort(List list){
int j;
int temp;
for(int i = 1;i < list.getLength(); i ++){//
j = selectMinKey(list,i);//初始化后再使用
if( i != j){
temp = list.getList()[j];
list.getList()[j] = list.getList()[i];
list.getList()[i] = temp;
}
}
return list;
}
//选择最小的
int selectMinKey(List list, int k){
int min = k;//
for(int i = k ; i <= list.getLength();i ++){
if(other.lower(list.getList()[i],list.getList()[min])) min = i;
}
return min;
}