[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; zxbfh/=
} [={mCGU
int i1=l; FTf#"'O
int i2=mid+1; v $Iw?y
for(int cur=l;cur<=r;cur++){ ''y.4dvX
if(i1==mid+1) u^1#9bAW8
data[cur]=temp[i2++]; KJA :;
else if(i2>r) Ao\xse{E
data[cur]=temp[i1++]; *\sPHz.
else if(temp[i1] data[cur]=temp[i1++]; D|N4X`T`
else .Q{RTp
data[cur]=temp[i2++]; Bqq=2lj
} an"&'D}U
} *MP.YI:h
:?>7Z6
} c0oHE8@
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改进后的归并排序: 9a}9cMJ^"
M|WBJ'#x0
package org.rut.util.algorithm.support; Y%pab/Y
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import org.rut.util.algorithm.SortUtil; ghk=` !yKw
Zw.8B0W
/** 7>FXsUt_
* @author treeroot tyu@aCK
* @since 2006-2-2 9R50,lsE
* @version 1.0 S<tw5!tJ
*/ M+)a6ge
public class ImprovedMergeSort implements SortUtil.Sort { Lo%n{*if
WYw#mSp
private static final int THRESHOLD = 10; lW+mH=
tt"<1 z@
/* NRi5 Vp2=
* (non-Javadoc) c-a,__c?hx
* CXa[%{[n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eb62(:=N6
*/ $x0SWJ \G
public void sort(int[] data) { IH]9%d)
int[] temp=new int[data.length]; z3oi(
mergeSort(data,temp,0,data.length-1); 3k Ci5C
} (l{vlFWd
h051Ol\v*
private void mergeSort(int[] data, int[] temp, int l, int r) { I;(3)^QH#
int i, j, k; |#oS7oV(
int mid = (l + r) / 2; /*K2i5&X
if (l == r) !+l'<*8V
return; =Zd(<&B K
if ((mid - l) >= THRESHOLD) is'V%q
mergeSort(data, temp, l, mid); qt/K$'
else al2t\Iq90
insertSort(data, l, mid - l + 1); MdHm%Vx
if ((r - mid) > THRESHOLD) 8-q^.<9
mergeSort(data, temp, mid + 1, r); Harg<l
else }E'0vf/
insertSort(data, mid + 1, r - mid); uDf<D.+5Ze
#Y'eS'lv4
for (i = l; i <= mid; i++) { U!wi;W2
temp = data; wP!X)p\
} :|S zD4Ag
for (j = 1; j <= r - mid; j++) { h>N}M}8
temp[r - j + 1] = data[j + mid]; 8y;Rw#Dz
} JK k0f9)
int a = temp[l]; C?PQ>Q!f-
int b = temp[r]; Z_d"<k}I
for (i = l, j = r, k = l; k <= r; k++) { "yWw3(V2>
if (a < b) { PRKZg]?
data[k] = temp[i++]; o/5-T4
a = temp; Cf{F"o
} else { 2]>O ZhS
data[k] = temp[j--]; zM'eqo>!c>
b = temp[j]; ^Q6J$"Tj
} N]<(cG&p
} TT$Ao
} FFHq':v
}F`|_8L*v)
/** oMh$:jR$
* @param data 0RUk^
* @param l $|K d<wv
* @param i aeqz~z2~8s
*/ x#rgFY,TY
private void insertSort(int[] data, int start, int len) { dP5x]'"x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @/2Kfr
} 9t`;~)o
} $TQhr#C]
} &!!*xv-z
} H;H=8'
VF]AH}H8I
堆排序： nm'l}/Ug
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package org.rut.util.algorithm.support; _z\/{
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import org.rut.util.algorithm.SortUtil; ^^y eC|~N:
fgLjF,Y
/** \}jMC
* @author treeroot / 3A6xPOg
* @since 2006-2-2 *Gsj pNr-
* @version 1.0 +y7z>Fwl
*/ %@$UIO,(
public class HeapSort implements SortUtil.Sort{ kaG/8G(
BZR{}Aj4pa
/* (non-Javadoc) 0[;2dc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X>q`F;W
*/ lu8G$EQI
public void sort(int[] data) { ]hl*6
MaxHeap h=new MaxHeap(); 12$0-@U
h.init(data); >)><u4}
for(int i=0;i h.remove(); _)A|JC!jId
System.arraycopy(h.queue,1,data,0,data.length); 8tY>%A~^z
} 7& M-^Ev
{#,<)wFV\
private static class MaxHeap{ }^"6:;,
.;#T<S"
void init(int[] data){ q=1 N&#RG
this.queue=new int[data.length+1]; uuzV,q
for(int i=0;i queue[++size]=data; .*O*@)}Ud
fixUp(size); L/3A g* ]
} .RD<]BxJ
} =c8}^3L~7
7"(!]+BW!O
private int size=0; m|*B0GW
_O9V"DM
private int[] queue; rb*|0ST
te_2"Z
public int get() { VPLf(
return queue[1]; @]\fO)\f
} '&>"`q
`lhw*{3A
public void remove() { AGBV7Kk
SortUtil.swap(queue,1,size--); exRw, Nk4
fixDown(1); 7DB_Z/uU
} 'yo@5*x7
file://fixdown FX:`7c]:9
private void fixDown(int k) { [KDxB>R<{
int j; `e[S Zj\
while ((j = k << 1) <= size) { "*g+qll!5d
if (j < size %26amp;%26amp; queue[j] j++; X/_I2X
if (queue[k]>queue[j]) file://不用交换 AtT7~cVe
break; m/HT3<F
SortUtil.swap(queue,j,k); N?GTfN
k = j; <-lM9}vd
} STKL
} 2TK \pfD
private void fixUp(int k) { %?~'A59
while (k > 1) { &@=Jm /5
int j = k >> 1; |vI*S5kn6A
if (queue[j]>queue[k]) QM$UxWo-
break; ZOK!SBn^?
SortUtil.swap(queue,j,k); 5_yQI D%Sq
k = j; TnW`#.f
} r(,U{bU<
} s!6lZ mPM
5Xy(za
} ;(Yb9Mr)z
"ra$x2|=}
} =SDex.ZK]
7h' C"rH
SortUtil： ^2+Ex+
UQVL)-Z
package org.rut.util.algorithm; >XN[KPTa
7iB!Uuc
import org.rut.util.algorithm.support.BubbleSort; oO}g~<fYG
import org.rut.util.algorithm.support.HeapSort; [4KQcmJc#
import org.rut.util.algorithm.support.ImprovedMergeSort; u@a){A(P
import org.rut.util.algorithm.support.ImprovedQuickSort; y\Wn:RR1[
import org.rut.util.algorithm.support.InsertSort; 2+]5}'M
import org.rut.util.algorithm.support.MergeSort; @T1G#[C~t
import org.rut.util.algorithm.support.QuickSort; *v<f#hB"
import org.rut.util.algorithm.support.SelectionSort; kk4 |4
import org.rut.util.algorithm.support.ShellSort; #G9 W65f
sz7*x{E
/** kc'$4 J4Tw
* @author treeroot %VHy?!/
* @since 2006-2-2 L!f~Am:#
* @version 1.0 vHaM yA-
*/ Bfb~<rs[
public class SortUtil { jkeerU6
public final static int INSERT = 1; X$};K\I
public final static int BUBBLE = 2; pn"!wqg
public final static int SELECTION = 3; j cd<'\;
public final static int SHELL = 4; j?T'N:Qd
public final static int QUICK = 5; 7UTfafOGX
public final static int IMPROVED_QUICK = 6; `IHP_IfR
public final static int MERGE = 7; Ou[K7-m%&
public final static int IMPROVED_MERGE = 8; p.8bX
public final static int HEAP = 9; 79DNNj~
ixTjXl2g
public static void sort(int[] data) { jCd]ENl+_
sort(data, IMPROVED_QUICK); ]3r}>/2(
} Upz)iOqLi
private static String[] name={ y4\X~5kU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iSfRJ:_&6
}; S!K<kn`E3
4:MvC^X~z
private static Sort[] impl=new Sort[]{ Jb,54uN
new InsertSort(), .G/Rh92
new BubbleSort(), vG|!d+
new SelectionSort(), z']6C9m}
new ShellSort(), xj5TnE9^
new QuickSort(), KGt:
new ImprovedQuickSort(), KpN]9d
new MergeSort(), 0nc(2Bi
new ImprovedMergeSort(), hB[bth
new HeapSort() vNi;)"&*
}; ^} {r@F
*F$@!ByV
public static String toString(int algorithm){ TE`5i~R*
return name[algorithm-1]; Va!G4_OT
} ^[hAj>7_8$
=OufafZb
public static void sort(int[] data, int algorithm) { 7cc^n\c?Y
impl[algorithm-1].sort(data); M+"6VtZH
} #p+iwW-
HDm]njF%qQ
public static interface Sort { 2gWR2 H@
public void sort(int[] data); wd:Yy
} 9qX$
YS3~sA
public static void swap(int[] data, int i, int j) { WZa6*pF
int temp = data; -TD\?Q
data = data[j]; hcVu`Bn
data[j] = temp; k?=1q[RQH
} bH+NRNI]
} VQIvu)I