[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; pL: r\Y:R
} <3x:nH @
int i1=l; 0> QqsQ
int i2=mid+1; 9{%/I
for(int cur=l;cur<=r;cur++){ [-^xw1:
if(i1==mid+1) ;X+cS,h
data[cur]=temp[i2++]; O7p=|F"
else if(i2>r) ,M :j5
data[cur]=temp[i1++]; p{&o{+c
else if(temp[i1] data[cur]=temp[i1++]; ]+>Kl>@
else 0CI\Yd=
data[cur]=temp[i2++]; %K0Wm#)
} WA5.qw
} #-l+cu{
rj/nn)vv;
} #;h> x
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改进后的归并排序: Q)5V3Q]@^
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package org.rut.util.algorithm.support; hJ?PV@xy
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import org.rut.util.algorithm.SortUtil; H-eHX3c7
)U{\c2b
/** hLT?aQLx
* @author treeroot eL [.;_
* @since 2006-2-2 $)6x3&]P
* @version 1.0 ITD&wg
*/ L#fK ,r8
public class ImprovedMergeSort implements SortUtil.Sort { mNJCV8 <
+y\o^w4sT
private static final int THRESHOLD = 10; C%#u2C2
}4?z<.V
/* j%gle%_
* (non-Javadoc) - x;xQ
* n^<J@uC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fM"&=X
*/ bpa'`sf
public void sort(int[] data) { 6cOlY= bn
int[] temp=new int[data.length]; Lc(eY{CY
mergeSort(data,temp,0,data.length-1); [{zfI`6
} BY@l:y4
3il$V78|
private void mergeSort(int[] data, int[] temp, int l, int r) { ;,xM*
int i, j, k; s\Ln
int mid = (l + r) / 2; !Oi':OQG
if (l == r) 2rHQ7
return; p+-IvU
if ((mid - l) >= THRESHOLD) Nl^uA
mergeSort(data, temp, l, mid); o* e'D7
else pDcGf7
insertSort(data, l, mid - l + 1); spWo{
if ((r - mid) > THRESHOLD) }- wK
mergeSort(data, temp, mid + 1, r); ~VV$wU!A
else HrUE?Sq
insertSort(data, mid + 1, r - mid); BadnL<cj]
BN6cu9a
for (i = l; i <= mid; i++) { EtQ:x$S_
temp = data; 24\^{3nOK
} cI-@nV
for (j = 1; j <= r - mid; j++) { *DvQnj
temp[r - j + 1] = data[j + mid]; i/PL!'oq
} r(rT.D&
int a = temp[l]; BE!l{
int b = temp[r]; SeLFubs_
for (i = l, j = r, k = l; k <= r; k++) { *a-KQw
if (a < b) { %q6I-
data[k] = temp[i++]; v`U;.W
a = temp; -1w^z`;2h
} else { 0qW"b`9R
data[k] = temp[j--]; ,o}CBB! k
b = temp[j]; AuY*x;~
} \uZ1Sl
} EXR6Vb,
} u(8dsgR
6#ktw)e
/** UK)wV
* @param data Uy?X-"UR
* @param l 55=YM'5]
* @param i &w:0ad|
*/ SAE'y2B*
private void insertSort(int[] data, int start, int len) { ZuKOscVS#T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &#OF,_6"m
} COj^pdE3
} ;WgzR_'!'
} EAz>`~
} <YrsS-9
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堆排序： G/_xn5XDD
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package org.rut.util.algorithm.support; +W8kMuM!
Hm+VGH'H?
import org.rut.util.algorithm.SortUtil; V6B[eV$D
%g69kizoWi
/** 8Nx fYA
* @author treeroot ]$Q@4=fb
* @since 2006-2-2 @X P_~ N
* @version 1.0 .pH 4[~
*/ /?a9g>G%N
public class HeapSort implements SortUtil.Sort{ aO2zD<d
)k]{FM
/* (non-Javadoc) ]ZH6 .@|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HcrlcxwM\i
*/ 5UX-Qqr
public void sort(int[] data) { Tq?f5swsI
MaxHeap h=new MaxHeap(); 'C@yJf
h.init(data); %BQ?DTtb7'
for(int i=0;i h.remove(); W,:j>vg
System.arraycopy(h.queue,1,data,0,data.length); 09i77
} j$4lyDfD
sXYXBX[
private static class MaxHeap{ 5C9 .h:c4y
rS+ >oP}
void init(int[] data){ uWi pjxS
this.queue=new int[data.length+1]; 99n;%W>
for(int i=0;i queue[++size]=data; M0hR]4T
fixUp(size); g!i45]6[Nw
} #%{
} %}unlSTPP
}H/94]~tH
private int size=0; e0IGx]5i
QBA{*@ A-
private int[] queue; Z{2QDjAI;
}4Q3S1|U
public int get() { X@/X65=[
return queue[1]; ,V)hV@Dk
} 3wQ\L=
;CuL1N#I
public void remove() { G]dHYxG
SortUtil.swap(queue,1,size--); pV1;gqXNS
fixDown(1); 0*j\i@
} 3f:]*U+O
file://fixdown '1d0 *5+6k
private void fixDown(int k) { hTPvt
int j; %D7'7E8.
while ((j = k << 1) <= size) { cW?6Iao
if (j < size %26amp;%26amp; queue[j] j++; To-$)GQ@W
if (queue[k]>queue[j]) file://不用交换 < B!f;
break; waG &3m
SortUtil.swap(queue,j,k); zLPCWP.u
k = j; c~d*SDca
} yr)e."#S
} '=d y =
private void fixUp(int k) { P<9T.l
while (k > 1) { H~:g=Zw
int j = k >> 1; -$kbj*b##
if (queue[j]>queue[k]) 9h<iw\$'
break; iztgk/(+G
SortUtil.swap(queue,j,k); !Wy&+H*0
k = j; mn(MgJKQ\
} ANR611-a
} )P|/<>z
V1A7hRjxvG
} yKmHTjX=
#XNURj
} "*KOU2}C
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SortUtil： i6i;{\tc
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package org.rut.util.algorithm; RG/P]
Z7Nhb{
import org.rut.util.algorithm.support.BubbleSort; <!X]$kvG
import org.rut.util.algorithm.support.HeapSort; buHUBn[3)
import org.rut.util.algorithm.support.ImprovedMergeSort; !H @nAz
import org.rut.util.algorithm.support.ImprovedQuickSort; UaHN*@
import org.rut.util.algorithm.support.InsertSort; fUJe{C<H
import org.rut.util.algorithm.support.MergeSort; 5!6}g<z&L
import org.rut.util.algorithm.support.QuickSort; f%REN3=5K
import org.rut.util.algorithm.support.SelectionSort; GB}X
import org.rut.util.algorithm.support.ShellSort; y;hco
}-&#vP~I
/** ^SS9BQ*m
* @author treeroot ^(:na6C
* @since 2006-2-2 j>~@vq
* @version 1.0 t'C9;
*/ N9z!-y'X
public class SortUtil { K81&BVx/
public final static int INSERT = 1; + Cq&~<B
public final static int BUBBLE = 2; eqpnh^0}d
public final static int SELECTION = 3; iT1HbAT]
public final static int SHELL = 4; wh^I|D?"
public final static int QUICK = 5; UQtG<W]<
public final static int IMPROVED_QUICK = 6; myB!\WY
public final static int MERGE = 7; vY,]f^F"
public final static int IMPROVED_MERGE = 8; Tn$| Xa+:s
public final static int HEAP = 9; NE Z ]%
k7z{q/]M
public static void sort(int[] data) { 4Q\~l(
sort(data, IMPROVED_QUICK); n>%TIoY
} eT8h:+k
private static String[] name={ Bv`3T Af2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *yW9-(
}; +R31YR8C0
ZaFqGcS~
private static Sort[] impl=new Sort[]{ _3gF~qr
new InsertSort(), dW#l3_'3T
new BubbleSort(), y{nX 6
new SelectionSort(), 9(BB>o54r
new ShellSort(), o2LUB)=R'
new QuickSort(), >JN[5aus
new ImprovedQuickSort(), M5S<N_+Pe
new MergeSort(), ?QzN\fY;
new ImprovedMergeSort(), ~ o5h}OU"
new HeapSort() `]<~lf
}; );^{;fLy%
ralU9MN.
public static String toString(int algorithm){ hPUYq7B
return name[algorithm-1]; \0l"9 B.
} }5"19 Go?
T9gQq 7(l
public static void sort(int[] data, int algorithm) { iLFhm4.PO
impl[algorithm-1].sort(data); xCm`g{
} AdRt\H<
|CjdmQ u
public static interface Sort { +@#-S
public void sort(int[] data); AFNE1q;{\
} om,=.,|Ld
JZcW?Or
public static void swap(int[] data, int i, int j) { r$Y% 15JV
int temp = data; Umk!m] q
data = data[j]; jyjK~!0
data[j] = temp; h,'m*@Eg
} }sGH}n<9*
} i(<do "Am<