[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; VTS8IXz
} jruwdm^
int i1=l; ZPRkk?M}.
int i2=mid+1; FK<1SOE
for(int cur=l;cur<=r;cur++){ r"c<15g2'
if(i1==mid+1) =5J}CPKbZI
data[cur]=temp[i2++]; 54v}iG
else if(i2>r) xzh`q
data[cur]=temp[i1++]; ApR>b%
else if(temp[i1] data[cur]=temp[i1++]; *{6{ZKM
else Kx7s d i
data[cur]=temp[i2++]; DYx3NDX7
} it \3-
} oUoDj'JN{
ve<D[jQsk
} rjz$~(&m6
:A"GOc,
改进后的归并排序: 4;=+qb
741Sd8
package org.rut.util.algorithm.support; *6<<6f`(
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import org.rut.util.algorithm.SortUtil; _ ZMoPEW
E&9BeU a#
/** g{RVxGE7
* @author treeroot VBo=*gn,$
* @since 2006-2-2 C8ek{o)%W
* @version 1.0 DgW*Br8<
*/ zb.dVK`7N-
public class ImprovedMergeSort implements SortUtil.Sort { d#NG]V/
G*^4+^Vz?
private static final int THRESHOLD = 10; s,Azcqem
H85JMPZ7
/* NH~\kV
* (non-Javadoc) k^K>*mcJ
* GKIO@!@[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OlI|.~
*/ 4SlEc|'7@
public void sort(int[] data) { j`7q7}
int[] temp=new int[data.length]; @~sJ ((G[5
mergeSort(data,temp,0,data.length-1); u7L&cx
} gM>geWB<
~Z-o2+xA
private void mergeSort(int[] data, int[] temp, int l, int r) { "n'kv!?\
int i, j, k; HtpZ5
int mid = (l + r) / 2; X;'H@GU0
if (l == r) db#svj*
return; m) QV2n
if ((mid - l) >= THRESHOLD) #g=7fu{n:
mergeSort(data, temp, l, mid); bf@H(gCW=
else B63puX{u#
insertSort(data, l, mid - l + 1); 07b=Zhh
if ((r - mid) > THRESHOLD) &PZ&'N|P
mergeSort(data, temp, mid + 1, r); P.aN4 9`=
else S\io5|P
insertSort(data, mid + 1, r - mid); RqB8g
A{|^_1
for (i = l; i <= mid; i++) { 17la/7l<
temp = data; ]-g9dV_[>j
} }l"pxp1K
for (j = 1; j <= r - mid; j++) { 8n??/VDRl
temp[r - j + 1] = data[j + mid]; Nk2n&(~$
} [] cF*en
int a = temp[l]; _3%eIyk4T
int b = temp[r]; uHeKttR-
for (i = l, j = r, k = l; k <= r; k++) { SFJ"(ey$
if (a < b) { lV".-:u_
data[k] = temp[i++]; q]Vxf!0*>
a = temp; _TntZv.?
} else { #;D@`.#\
data[k] = temp[j--]; '2XIeR
b = temp[j]; sD#*W<
} m)Ta5w^
} ghU~H4[xD
} y7^E`LKK
{f"oqry_g
/** Z2a~1BL
* @param data 7w\L<vFm
* @param l };Pdn7;1G:
* @param i g~p43sVV
*/ BD,J4xH;
private void insertSort(int[] data, int start, int len) { fj|X`,TiZ;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tJ$gH;
} 2Y>#FEW/
} 4ibOVBG:*,
} #?"^:,Y
} Uz=OTM
(h"-#q8$
堆排序： LIE5of
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package org.rut.util.algorithm.support; w~4T.l#1
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import org.rut.util.algorithm.SortUtil; [,L>5:T
l#IN)">1
/** YJGP8
* @author treeroot otA'+4\
* @since 2006-2-2 G4rd<V0[D
* @version 1.0 ^u(-v/D9
*/ "% l``
public class HeapSort implements SortUtil.Sort{ [>D5(O
|"g+p)A
/* (non-Javadoc) R0~w F>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !LM9
*/ FQBE1h@k0u
public void sort(int[] data) { ~^bf1W[
MaxHeap h=new MaxHeap(); BdrYc^?JL]
h.init(data); (<2!^v0.M
for(int i=0;i h.remove(); y!8m7a
System.arraycopy(h.queue,1,data,0,data.length); E(F?o.b
} jP#I](\eG
1>=%TIO)
private static class MaxHeap{ m*|G2
@4G{L8Q}
void init(int[] data){ @>*r2=#14
this.queue=new int[data.length+1]; `y>BbJqy
for(int i=0;i queue[++size]=data; &$bcB]C\3
fixUp(size); '>cZ7:
} 068DC_
} :.=#U
XTJA"y
private int size=0; "m>BE
4Ss*h,Y
private int[] queue; Qe =8x7oIP
kho$At)V
public int get() { {ub'
return queue[1]; V%'' GF
} L8J] X7
Ax6zx
public void remove() { ;#L]7ZY9:-
SortUtil.swap(queue,1,size--); .Zc:$"gDu
fixDown(1); D@%!|:
} 5(thDZ!
file://fixdown 40aD\S>
private void fixDown(int k) { (ys<{Y-;
int j; F9k}zAY\J
while ((j = k << 1) <= size) { 4C[kj
if (j < size %26amp;%26amp; queue[j] j++; 2?F?C
if (queue[k]>queue[j]) file://不用交换 Z.`0
break; 4-BrE&2f
SortUtil.swap(queue,j,k); rgo!t028^
k = j; j-d542"
} woa|h"T
} 5 qMP u|A
private void fixUp(int k) { 1HLU &
while (k > 1) { H#M;TjR
int j = k >> 1; 0a9[}g1=#
if (queue[j]>queue[k]) l{QlJ>%~{;
break; BCO (,k
SortUtil.swap(queue,j,k); a4XK.[O
k = j; =zR9^k
} Yyw9IYB;
} @"B{k%+
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} GL _hRu
0v#p4@Z
} /IlO
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SortUtil： 3:<[;yo
F-XMy>9
package org.rut.util.algorithm; XZ2 ji_D
w\M"9T
import org.rut.util.algorithm.support.BubbleSort; fZ(k"*\MZ
import org.rut.util.algorithm.support.HeapSort; cT@H49#uB
import org.rut.util.algorithm.support.ImprovedMergeSort; K#Xl)h}y7
import org.rut.util.algorithm.support.ImprovedQuickSort; Tv `&
import org.rut.util.algorithm.support.InsertSort; .e4upTGU
import org.rut.util.algorithm.support.MergeSort; 8@ S@^C*F
import org.rut.util.algorithm.support.QuickSort; ,Iru_=Wk~
import org.rut.util.algorithm.support.SelectionSort; ~Rx`:kQ
import org.rut.util.algorithm.support.ShellSort; ^A=2#j~H\
WD5jO9Oai
/** :)y3&I
* @author treeroot ixL[(*V
* @since 2006-2-2 TEla?N
* @version 1.0 ^x Z=";eq
*/ Uu|2!}^T
public class SortUtil { --k!KrL
public final static int INSERT = 1; :Dfl,=S
public final static int BUBBLE = 2; x_9#:_S'
public final static int SELECTION = 3; ltyhYPS
public final static int SHELL = 4; s)Xz}QPK.
public final static int QUICK = 5; ']d(m?
public final static int IMPROVED_QUICK = 6; vsPIvW!V
public final static int MERGE = 7; S_ra8HY8
public final static int IMPROVED_MERGE = 8; 5~$WSL?O)
public final static int HEAP = 9; >`|Wg@_
<?:h(IZe[
public static void sort(int[] data) { hOYX
sort(data, IMPROVED_QUICK); <nK@+4EH"o
} ~.#57g F"
private static String[] name={ (w`_{%T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0>"y)T3
}; 11Uu5e!.
pU<GI@gU
private static Sort[] impl=new Sort[]{ T)tTzgLD}
new InsertSort(), t~$8sG\
new BubbleSort(), ^)o]hE|
new SelectionSort(), @V&HE:P
new ShellSort(), _Ea1;dJmq
new QuickSort(), $h}w:AV:
new ImprovedQuickSort(), gB>AYL%o=
new MergeSort(), iVo-z#
new ImprovedMergeSort(), eep/96G ?
new HeapSort() )`S5>[6
}; L8oqlq( 9
q^uCZnkb=
public static String toString(int algorithm){ O|+$9#,
return name[algorithm-1]; \9~Q+~@{G
} F&C< = l\X
Urol)_3X
public static void sort(int[] data, int algorithm) { `)kxFD_bH
impl[algorithm-1].sort(data); :2+z_+k}<
} 3#aLCpVla
^5)=)xVF
public static interface Sort { {E}D6`{
public void sort(int[] data); xTqP`ljX
} #ApmJLeCO
cEn|Q
public static void swap(int[] data, int i, int j) { #Zi6N
int temp = data; VCT1GsnE
data = data[j]; +U>Y.YP
data[j] = temp; 9{rE7OX*A
} F6\4[B
} 7\X_%SM%