[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; J~Ph)|AiS
} {vH8X(m
int i1=l; _k@l-Bj
int i2=mid+1; a|53E<5X
for(int cur=l;cur<=r;cur++){ [}Iq-sz;0
if(i1==mid+1) F>Oh)VL,Ev
data[cur]=temp[i2++]; [*<&]^
else if(i2>r) W P&zF$
data[cur]=temp[i1++]; c,fedH;
else if(temp[i1] data[cur]=temp[i1++]; u'b_zlW@
else $3Ia+O
data[cur]=temp[i2++]; l`]!)j|+
} sg2C_]i,H
} x M[#Ah)
wz#n$W3mGf
} *Wau7
cA\W|A)
改进后的归并排序: K!~](_W!
TDGzXJf[
package org.rut.util.algorithm.support; R}Y=!qjYE=
&40]sxm
import org.rut.util.algorithm.SortUtil; {cI<4><
el%Qxak`"
/** y_&XF>k91
* @author treeroot E=QQZ\w
* @since 2006-2-2 N-|Jj?c
* @version 1.0 *S4P'JSY
*/ yB1>83!q
public class ImprovedMergeSort implements SortUtil.Sort { AVWrD[ wD2
a40BisrD~6
private static final int THRESHOLD = 10; jayoARUB
dp70sA!JF
/* `ahXn
* (non-Javadoc) .#J3UZ
* 9="sx 8?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~dLZ[6Z
*/ #w@Pa L iS
public void sort(int[] data) { ||HIp9(3
int[] temp=new int[data.length]; H/&Q,9sU21
mergeSort(data,temp,0,data.length-1); mK-:laIL"
} (c2\:hvy
QEKFuY<E+
private void mergeSort(int[] data, int[] temp, int l, int r) { ;gnr\C*G
int i, j, k; z-G (!]:
int mid = (l + r) / 2; /f<(K-o]
if (l == r) '[^2uQc
return; 3(&F.&C$$
if ((mid - l) >= THRESHOLD) 88j ;7
mergeSort(data, temp, l, mid); ZtoE=7K
else <UdD@(iZ#
insertSort(data, l, mid - l + 1); ?<QFW#:)
if ((r - mid) > THRESHOLD) %#a%Luq
mergeSort(data, temp, mid + 1, r); QO/7p]$_
else +GU16+w~E
insertSort(data, mid + 1, r - mid); w"iZn
6DW|O<k^j
for (i = l; i <= mid; i++) { ""^BW Re D
temp = data; AHY)#|/)
} pe})A
for (j = 1; j <= r - mid; j++) { *XOKH+_u
temp[r - j + 1] = data[j + mid]; o7XRa]O
} ;i:wY&
int a = temp[l]; ;@ X
int b = temp[r]; s[4!R&b
for (i = l, j = r, k = l; k <= r; k++) { FF~4y>R7u
if (a < b) { ~|C1$.-
data[k] = temp[i++]; E}/|Lja
a = temp; *8H;KGe=
} else { L0 2~FT
data[k] = temp[j--]; L.[uMuUa
b = temp[j]; F|`B2Gr
} 2{Iz
} ^3o8F
} '|N4fbZd
5)NBM7h
/** rxp9B>~
* @param data 4(GgaQFO?
* @param l r~_ /Jj
* @param i VDjIs UUX
*/ Y'0?<_ fj
private void insertSort(int[] data, int start, int len) { TcmZ0L^O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8z8SwWS?
} GSnHxs)
} W?J[K;<
} E(+wl
} B2qq C-hw?
Pt0}9Q
堆排序： '/gwC7*-&
WTv\HI2X !
package org.rut.util.algorithm.support; Yf)|ws?!
[HiTR!o*
import org.rut.util.algorithm.SortUtil; L9?/ -@M
V^/^OR4k
/** p<fgUVR
* @author treeroot <O)X89dFM
* @since 2006-2-2 (DP9& b
* @version 1.0 NV(4wlh)y
*/ ::R00gd
public class HeapSort implements SortUtil.Sort{ 3=|2Gs?ut
seU^IC<
/* (non-Javadoc) *([)X2A@+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %R*vSRG/U
*/ r5da/*G/O
public void sort(int[] data) { ~nc([%!=
MaxHeap h=new MaxHeap(); v:Z4z6M-
h.init(data); )^>XZ*eK
for(int i=0;i h.remove(); =*:_swd
System.arraycopy(h.queue,1,data,0,data.length); {%~4RZA
} ig_<kj;Vd
5~%,u2
private static class MaxHeap{ Y{2d4VoW6
-YjgS/g
void init(int[] data){ .A!0.M|
this.queue=new int[data.length+1]; :htq%gPex9
for(int i=0;i queue[++size]=data; SP?U@w%}
fixUp(size); ~& WN)r'4y
} }Wche/g`
} , 64t
MAD}Tv\S7
private int size=0; FJ(B]n[>
TFYTvUn
private int[] queue; T'b/]&0Tio
$FusDdCv3
public int get() { d:<H?~
return queue[1]; H~dHVQtJZ
} cI%"Ynq"3
L}jF#*Q%
public void remove() { =e!l=d|/
SortUtil.swap(queue,1,size--); %V(N U_o
fixDown(1); Ph+X{|
} E_D ^O
file://fixdown o%WjJ~!zL
private void fixDown(int k) { b~r{J5x@
int j; T<f\*1~^
while ((j = k << 1) <= size) { >'}=.3\
if (j < size %26amp;%26amp; queue[j] j++; c@ZS|U*(
if (queue[k]>queue[j]) file://不用交换 T~o{woq}g
break; Gl8&FrR
SortUtil.swap(queue,j,k); m UWkb
k = j; `kNi*I^
} (\T0n[
} 8L-4}!~C
private void fixUp(int k) { 6vgBqn[
while (k > 1) { `/w\2n
int j = k >> 1; &(1H!
if (queue[j]>queue[k]) K/2.1o;9
break; 3xzkZ8]/
SortUtil.swap(queue,j,k); JS/M~8+Et
k = j; {+"g':><
} C1T=O
} nJleef9
2<'`^AO@
} iIsEQh
/BMtcCPG!
} w!WRa8C
3duG.iUlL
SortUtil： WgA`kT
% Cu.u)/+
package org.rut.util.algorithm; [6; N3?+
6X7s 4
import org.rut.util.algorithm.support.BubbleSort; &:c:9w
import org.rut.util.algorithm.support.HeapSort; gwSN>oj &
import org.rut.util.algorithm.support.ImprovedMergeSort; ~^I\crx,U%
import org.rut.util.algorithm.support.ImprovedQuickSort; dU]i-NF
import org.rut.util.algorithm.support.InsertSort; Y5ogi)
import org.rut.util.algorithm.support.MergeSort; X"[dQ_o
import org.rut.util.algorithm.support.QuickSort; K8 b+
import org.rut.util.algorithm.support.SelectionSort; ohrw\<xsu
import org.rut.util.algorithm.support.ShellSort; ~{kM5:-iw
"v(G7*2
/** P</s)"@
* @author treeroot FXx.$W
* @since 2006-2-2 u12zRdn
* @version 1.0 t`"^7YFS>
*/ $ph0ag+
public class SortUtil { #B @X
public final static int INSERT = 1; Tu]&^[B('
public final static int BUBBLE = 2; NJZXs_%>$
public final static int SELECTION = 3; of9q"h
public final static int SHELL = 4; cYGRy,'gH
public final static int QUICK = 5; TH|?X0b
public final static int IMPROVED_QUICK = 6; ?75\>NiR
public final static int MERGE = 7; u]HS(B,ht
public final static int IMPROVED_MERGE = 8; wms1IV%;
public final static int HEAP = 9; 6Wj@r!u
</.z1 $
public static void sort(int[] data) { 4d!S#zx
sort(data, IMPROVED_QUICK); o2DtCU-A
} P7z:3o.
private static String[] name={ HOE2*4r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L 5+J ^
}; wGPotPdE2
q"S(7xWS
private static Sort[] impl=new Sort[]{ ?^|QiuU:n
new InsertSort(), O -G1})$
new BubbleSort(), *|mz_cKu
new SelectionSort(), zK=dzoy
new ShellSort(), 2G?$X?
new QuickSort(), J'W}7r
new ImprovedQuickSort(), `h?LVD'l
new MergeSort(), -Q#o)o
new ImprovedMergeSort(), {VR`;
new HeapSort() h1#S+k
}; c4\C[$
<P1rqM9^
public static String toString(int algorithm){ !2z!8kI
return name[algorithm-1]; U IfH*6X
} /|?F)%v\
?w*yW;V`
public static void sort(int[] data, int algorithm) { ~ FGe~
impl[algorithm-1].sort(data); ]u+MTW;
} X(]Zr
Zd[OWF
public static interface Sort { `fz,Lh*v
public void sort(int[] data); :j@8L.<U
} iX%[YQ |
Nsn~@.UuSW
public static void swap(int[] data, int i, int j) { M ?*Tf&
int temp = data; 7:TO\0]2n
data = data[j]; (= 9wo
data[j] = temp; MAnp{
} )Vg2Jix,]
} qgx?"$ Z