[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; P#'DGW&W0
} x[,wJzp\6
int i1=l; )SZ,J-H08w
int i2=mid+1; 5=;I|l,
for(int cur=l;cur<=r;cur++){ `J;/=tf09
if(i1==mid+1) Zm'::+tl
data[cur]=temp[i2++]; wBaFC\CW
else if(i2>r) 4~J1pcBno%
data[cur]=temp[i1++]; 4pHPf<6
else if(temp[i1] data[cur]=temp[i1++]; JT+lWhy
else =u1w\>(2Y
data[cur]=temp[i2++]; ,)\5O0 D6
} 1x5CsmS
} L.~]qs|G/K
7D1`^,?
} X0J]6|du.
mJ#B<I'
改进后的归并排序: n"VE!`B
4)S?Y"Bs
package org.rut.util.algorithm.support; x>/@Z6Wxz
nJ`a1L{N
import org.rut.util.algorithm.SortUtil; Yka yT0!
<EE+ S#z
/** 4%.2=
* @author treeroot lbXkZ,
* @since 2006-2-2 Z.#glmw^=R
* @version 1.0 G"R>aw
*/ `x^,k% :4
public class ImprovedMergeSort implements SortUtil.Sort { 6xQe!d3>s3
fP4IOlHkE
private static final int THRESHOLD = 10; a5g{.:NfO
$@!&ML
/* ?^A:~"~
* (non-Javadoc) ,lGwW8$R
* ?;kc%Rz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =kkA
*/ 0BZOr-i
public void sort(int[] data) { ~5?n&pF
int[] temp=new int[data.length]; D&lXi~Z%.
mergeSort(data,temp,0,data.length-1); -D':7!@
} 9fLP&v
BY2txLLB
private void mergeSort(int[] data, int[] temp, int l, int r) { a[9OtZX<
int i, j, k; uS10P7N}
int mid = (l + r) / 2; 9>Z#o<*_/
if (l == r) ])";Z
return; K%#C+`Ij
if ((mid - l) >= THRESHOLD) =-&iF
mergeSort(data, temp, l, mid); &:{yf=
else CAObC%
insertSort(data, l, mid - l + 1); {Ao^3vB
if ((r - mid) > THRESHOLD) "f$A0RL
mergeSort(data, temp, mid + 1, r); OnPLz"-
else ue2nfp
insertSort(data, mid + 1, r - mid); u,k8i:JY
2\W<EWJ@
for (i = l; i <= mid; i++) { -5*;J&.
temp = data; ^x#RUv
} KTREOOu .t
for (j = 1; j <= r - mid; j++) { N.cRZm%
temp[r - j + 1] = data[j + mid]; WK5bt2x
} EjCs
int a = temp[l]; ~_\2\6%1^n
int b = temp[r]; @Bwl)G!|
for (i = l, j = r, k = l; k <= r; k++) { !a&F:Fbm
if (a < b) { {.)~4.LhQM
data[k] = temp[i++]; T1TZ+\
a = temp; .-*nD8b
} else { G#M]\)f%
data[k] = temp[j--]; VL1z$<vVXt
b = temp[j]; g5'bUYsa
} yc}t(*A5
} AR2+W^aM3
} ?Qp_4<(5
im\Ws./
/** s'w0pZqj
* @param data 7oSuLo=
* @param l ?2/M W27w
* @param i gVWLY;c 3}
*/ QVhBHAw
private void insertSort(int[] data, int start, int len) { c>k6i?u:X7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pAL-Pl9z
} `-\JjMSQ1
} \Vq;j 1
} `215Llzk;
} he6) L6T
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堆排序： j;vaNg|vQ
+u.L6GcB
package org.rut.util.algorithm.support; f%l#g]]
: s3Vl
import org.rut.util.algorithm.SortUtil; XV!EjD~q
0`=?ig_
/** $5[RR
* @author treeroot 6lFsN2
* @since 2006-2-2 K6Ua~N^
* @version 1.0 >,1LBM|0u
*/ Y5pNKL
public class HeapSort implements SortUtil.Sort{ {1ceF
(]dZ+"O{
/* (non-Javadoc) <H#K`|Ag
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j3F=P
*/ k}gs;|_
public void sort(int[] data) { E':Z_ ^4
MaxHeap h=new MaxHeap(); zK;t041e
h.init(data); $*ZHk0 7x
for(int i=0;i h.remove(); Re>e|$.T
System.arraycopy(h.queue,1,data,0,data.length); }_TdXY #w\
} 8h2?Q
[b'fz
private static class MaxHeap{ ak&v/%N
IA!Kpg W
void init(int[] data){ 6Z=H>w
this.queue=new int[data.length+1]; lvffQ_t
for(int i=0;i queue[++size]=data; <GEn9;\
fixUp(size); BW[K/l~"$:
} K.Ir+SB
} &Gl&m@-j
_FgeE`X
private int size=0; &GAx*.L
aKZD4;
private int[] queue; Aed"J5[a
{F[Xe_=#"
public int get() { %m`QnRX?D
return queue[1]; ij^!TY[0
} QkAwG[4
64@s|m*
public void remove() { r8$TT\?~
SortUtil.swap(queue,1,size--); :gC2zv
fixDown(1); 5#PhaVc
} tp&iOP6O
file://fixdown 4dAhJjhgD
private void fixDown(int k) { }+1oD{
int j; x.Y,]wis
while ((j = k << 1) <= size) { NST6pu\,U
if (j < size %26amp;%26amp; queue[j] j++; ~Otf "<
if (queue[k]>queue[j]) file://不用交换 T~E83Jw
break; sjGZ ,?%
SortUtil.swap(queue,j,k); 7\lb+^$
k = j; cCs:z
} 6h%(0=^
} CTYkjeej
private void fixUp(int k) { Wi<Fkzj
while (k > 1) { NM]/OKs'H
int j = k >> 1; @So"(^
if (queue[j]>queue[k]) ~sD'pS
break; /jAs`"U
SortUtil.swap(queue,j,k); T~Cd=s(T"
k = j; 1<UQJw45
} o6oYJ`PY
} NGu]|p
mLSAi2Y
} +l\Dp
TrW3@@}j
} R >TtAm0N
mUxD.;P
SortUtil： HN+z7Q8hH
U@WT;:.T
package org.rut.util.algorithm; i^(<E0vS
OJaU,vQ#
import org.rut.util.algorithm.support.BubbleSort; (XQG"G%U6W
import org.rut.util.algorithm.support.HeapSort; Qd&j~cG@
import org.rut.util.algorithm.support.ImprovedMergeSort; so*7LM?ib>
import org.rut.util.algorithm.support.ImprovedQuickSort; '(}BfDP
import org.rut.util.algorithm.support.InsertSort; VTU-'q
import org.rut.util.algorithm.support.MergeSort; Rx.0P6s
import org.rut.util.algorithm.support.QuickSort; nYHk~<a
import org.rut.util.algorithm.support.SelectionSort; =v8q
import org.rut.util.algorithm.support.ShellSort; t!tBN
;uy/Vc5,Y
/** -|5&3HVz
* @author treeroot <G={Vfr
* @since 2006-2-2 aryr
* @version 1.0 ak zb<aT
*/ pFh2@O
public class SortUtil { `/O_6PQ}
public final static int INSERT = 1; =z+zg^wsT
public final static int BUBBLE = 2; 'Tn$lh
public final static int SELECTION = 3; be_t;p`3
public final static int SHELL = 4; !VW#hc\A5
public final static int QUICK = 5; ?`xId;}J#7
public final static int IMPROVED_QUICK = 6; Tym!7H2
public final static int MERGE = 7; : SNp"|
public final static int IMPROVED_MERGE = 8; w[iQndu
public final static int HEAP = 9; WG,{:|!E
IaB A2
public static void sort(int[] data) { #X+)
sort(data, IMPROVED_QUICK); 6m9Z5:xG
} /D12N'VaE
private static String[] name={ fg2}~02n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s$Mj4_p3l
}; YAO0>T<F
97lwPjq
private static Sort[] impl=new Sort[]{ Kf*+Ilq%L
new InsertSort(), <_5z^@N3$
new BubbleSort(), ?AEpg.9R-
new SelectionSort(), R[b?kT-%
new ShellSort(), <m!\Ma
new QuickSort(), @m6E*2Gg
new ImprovedQuickSort(), _<8n]0lX3
new MergeSort(), \*7Tj-#
new ImprovedMergeSort(), `k+k&t
new HeapSort() lH[N*9G(
}; e>[QF+e)y
QL3%L8
public static String toString(int algorithm){ #/aWGx_
return name[algorithm-1]; ^J327
} ^U52 *6
F=cO=5Iz
public static void sort(int[] data, int algorithm) { g#e"BBm=A
impl[algorithm-1].sort(data); B}vI<?c
} q8U]Hyp(`
Gh j[nsoC~
public static interface Sort { /2c?+04+
public void sort(int[] data); ^;'3(m=
} n`6vM4rM)
_\[Zr.y
public static void swap(int[] data, int i, int j) { 3Cpix,Dc
int temp = data; /<@oUv
data = data[j]; ?D#Vha
data[j] = temp; G2mv6xK'
} a 3HS!/
} "|hmiMdGB