[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; #U'}g *
} L?N:4/0;!
int i1=l; *#p}FB2H#
int i2=mid+1; D0\*WK$
for(int cur=l;cur<=r;cur++){ 7.{+8#~nV
if(i1==mid+1) F6{ O
data[cur]=temp[i2++]; _0[s]
else if(i2>r) /W>?p@j+K
data[cur]=temp[i1++]; aIT0t0.
else if(temp[i1] data[cur]=temp[i1++]; v3~`1MM
else r *N@%T
data[cur]=temp[i2++]; T#E,^|WEk
} M+-odLltw
} cl23y}J_?
c(Xm~ 'jeH
} vzAY+EEx
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改进后的归并排序: z xgDaT
m k~F@
package org.rut.util.algorithm.support; 0I)eYksh
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import org.rut.util.algorithm.SortUtil; iMM9a;G+
j~rW 2(
/** NxH%%>o>
* @author treeroot xE_~.EoB
* @since 2006-2-2 </9c=GoJ
* @version 1.0 sNG 7fi.|
*/ O?#<kmd/)
public class ImprovedMergeSort implements SortUtil.Sort { =585TR; V
9u^za!pE
private static final int THRESHOLD = 10; U2Siw
M;g"rpM
/* )fuAdG
* (non-Javadoc) 4,`t9f^:
* j0cB#M44
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +IGSOWL
*/ CW@EQ3y0
public void sort(int[] data) { ;[C_ho
int[] temp=new int[data.length]; nKwOSGPQt
mergeSort(data,temp,0,data.length-1); zcV~)go6
} !y1qd
TD;u"
private void mergeSort(int[] data, int[] temp, int l, int r) { OS~Z@'Eg
int i, j, k; Fyz1LOH[X
int mid = (l + r) / 2; FLumI-se!
if (l == r) 8N<2RT8W
return; .4z_ohe
if ((mid - l) >= THRESHOLD) ^6UE/4x!y
mergeSort(data, temp, l, mid); fob.?ID-;
else &)Vuh=
insertSort(data, l, mid - l + 1); T~lHm
if ((r - mid) > THRESHOLD) % y` tDR
mergeSort(data, temp, mid + 1, r); 74A&#ecb{
else IjPtJwW`A
insertSort(data, mid + 1, r - mid); QF.M%she+
_Pw5n mH c
for (i = l; i <= mid; i++) { R,hwn2@B
temp = data; gfXit$s
} /u"K`y/*j\
for (j = 1; j <= r - mid; j++) { /KgP<2p
temp[r - j + 1] = data[j + mid]; '8^>Z.~V
} fQfd1=4
int a = temp[l]; 5'rP-z~ u
int b = temp[r]; E_xCRfw_i]
for (i = l, j = r, k = l; k <= r; k++) { AhVV
if (a < b) { P#KTlH
data[k] = temp[i++]; mnYzn[d3U
a = temp; R"`<ZY6(Ou
} else { 0$R}_Ok
data[k] = temp[j--]; Nk\/lK\
b = temp[j]; I~M@v59C
} F{17K$y
} X5)].[d
} k _Bz@^J
2reQd47
/** t] G hONN
* @param data v00w GOpW
* @param l J.,7d ,
* @param i U)S!@2(4
*/ /a-OBU
private void insertSort(int[] data, int start, int len) { 7@!ne&8Z?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V?Ca[
} %vWh1-
} #"JtH"pF
} !y;xt?
} /:w.Zf>B9
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堆排序： l !R >I7
78zwu<ET
package org.rut.util.algorithm.support; D89(u.h
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import org.rut.util.algorithm.SortUtil; 0e~4(2xK
Q$S|LC
/** D14i]
* @author treeroot \avgXndI
* @since 2006-2-2 8Dc'"3+6
* @version 1.0 -H](2}
*/ FHyyZ{"
public class HeapSort implements SortUtil.Sort{ s+]6X*)
HqKD]1
/* (non-Javadoc) tc<HA7vpt~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )cRP6 =
*/ 1NU@k6UHl
public void sort(int[] data) { }ILg_>uq[
MaxHeap h=new MaxHeap(); $s9YU"
h.init(data); :}~B;s0M\
for(int i=0;i h.remove(); [G}l;
System.arraycopy(h.queue,1,data,0,data.length); k%sh;1.
} uRRp8hht
#7,;/rtO7
private static class MaxHeap{ 8CGjI?j
|D[4G6&
void init(int[] data){ iJEKLv
this.queue=new int[data.length+1]; MryY<s
for(int i=0;i queue[++size]=data; 5tu 4uYp;
fixUp(size); sxn^1|O;m
} qa)Qf,`
} 9d >AnTf&H
:LMLY<8>9
private int size=0; 6+_qGV
Ub*O*nre
private int[] queue; CW;=q[+w
hT$/B|
public int get() { >0jg2vqt
return queue[1]; :)Z.!
} b#{[Pk,w9
)p+6yH
public void remove() { drf?7%v
SortUtil.swap(queue,1,size--); 3q$"`w
fixDown(1); ]=T-Cv=t
} 5(&'/U^
file://fixdown UNKr FYl
private void fixDown(int k) { A@#D_[~
int j; nG !6[^D
while ((j = k << 1) <= size) { }SBpc{ch
if (j < size %26amp;%26amp; queue[j] j++; ^@n?&
if (queue[k]>queue[j]) file://不用交换 LHgEb9\Q
break; nv2p&-e+
SortUtil.swap(queue,j,k); Y.v. EZ
k = j; xa|/P#q
} ?LA`v_
} jun$CY4
private void fixUp(int k) { 5"I8ric
while (k > 1) { z!:%Hbh=
int j = k >> 1; L{AfrgN
if (queue[j]>queue[k]) _';oT*#
break; ,e5#wz
SortUtil.swap(queue,j,k); !p|d[
k = j; :]k`;;vh
} gKWsmx!["
} :PF6xL&
OykYXFv*
} 3=xN)j#B
>]S-a-|Bp
} ,5HC&@
1wM~),B8
SortUtil： E)utrO R
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package org.rut.util.algorithm; I<^&~==
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import org.rut.util.algorithm.support.BubbleSort; @Xj6h!"R
import org.rut.util.algorithm.support.HeapSort; ;dE'# Kb
import org.rut.util.algorithm.support.ImprovedMergeSort; ;ax%H @o
import org.rut.util.algorithm.support.ImprovedQuickSort; z)U/bjf
import org.rut.util.algorithm.support.InsertSort; Sk|DVV$
import org.rut.util.algorithm.support.MergeSort; wDz}32wB
import org.rut.util.algorithm.support.QuickSort; UbSAyf
import org.rut.util.algorithm.support.SelectionSort; ftwn<B
import org.rut.util.algorithm.support.ShellSort; ,f?+QV\T.
f{eMh47 NC
/** U *']7-
* @author treeroot E|l qlS7
* @since 2006-2-2 =& =#G3f
* @version 1.0 y?@(%PTp
*/ ?0k4l8R
public class SortUtil { brt1Kvu8(
public final static int INSERT = 1; TuX9:Q
public final static int BUBBLE = 2; Rt2<F-gY
public final static int SELECTION = 3; af<wUxM0
public final static int SHELL = 4; -Ay=*c.4
public final static int QUICK = 5; ^4 ?LQ[t'
public final static int IMPROVED_QUICK = 6; @fO[{V
public final static int MERGE = 7; l.`f^K=8
public final static int IMPROVED_MERGE = 8; A~MIFr/8
public final static int HEAP = 9; ym.:I@b?6
j$jgEtPK9=
public static void sort(int[] data) { +_ZXzzcO<
sort(data, IMPROVED_QUICK); 8|Vm6*TY&p
} Y$&+2w,)H,
private static String[] name={ s(MLBV5)w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3}9c0%}F
}; o/5loV3h
1&Ruz[F5
private static Sort[] impl=new Sort[]{ 7\nR'MOZ
new InsertSort(), Tq*K =^
new BubbleSort(), P{gy/'PH,
new SelectionSort(), C3>`e3v
new ShellSort(), =#|K-X0d=
new QuickSort(), ~s4o1^6L
new ImprovedQuickSort(), :#&Y
new MergeSort(), J2d3&6
new ImprovedMergeSort(), T.x"a$AU
new HeapSort() HHcWyu
}; oQ"J>`',
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public static String toString(int algorithm){ -J\R}9 lIm
return name[algorithm-1]; qVMBZ\`Qm
} bL9vjD'}
;'~GuZ#I
public static void sort(int[] data, int algorithm) { *Y/}EX!F
impl[algorithm-1].sort(data); 7t~12m8x
} LOf)D7T
W5_aS2$
public static interface Sort { VYC$Q;Z
public void sort(int[] data); %kSpMj|
} ipdGAG
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public static void swap(int[] data, int i, int j) { 1}Mdo&:t
int temp = data; fA{t\
data = data[j]; q6a7o=BP]
data[j] = temp; PG*:3![2
} I' TprT
} asd3J