[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(C UYm
} KR(} A"
int i1=l; !muYn-4M
int i2=mid+1; uyt-q|83=
for(int cur=l;cur<=r;cur++){ :wZ`>,K"t>
if(i1==mid+1) B"9hQb
data[cur]=temp[i2++]; chmJ|
else if(i2>r) j& iL5J;
data[cur]=temp[i1++]; Q@wq }vc!
else if(temp[i1] data[cur]=temp[i1++]; .00=U;H%`
else Jav2A6a
data[cur]=temp[i2++]; RIEv*2_O
} pEj^x[b`^
} pptM&Y
6//FZ:q
} 7E3SvC|M
qf`xH"$
改进后的归并排序: p <=%
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package org.rut.util.algorithm.support; E97+GJ3
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import org.rut.util.algorithm.SortUtil; $7&l6~sMQ
~po%GoH(K
/** Va Yu%
* @author treeroot &^n>ZY,
* @since 2006-2-2 NTXL>Q*e
* @version 1.0 nH>V Da
*/ uy _i{Y|
public class ImprovedMergeSort implements SortUtil.Sort { VNrO(j DUv
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private static final int THRESHOLD = 10; cYM~IA
RC{Z)M{~
/* aXbNDj ][
* (non-Javadoc) B UQn+;be
* W0MnGzZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 04guud }
*/ 2Uv3_i<
public void sort(int[] data) { (vAv^A*i}
int[] temp=new int[data.length]; Ivt} o_b*
mergeSort(data,temp,0,data.length-1); L>Oy7w)Y
} gJ5wAK+?
2PR7M.V7
private void mergeSort(int[] data, int[] temp, int l, int r) { >mFX^t_,
int i, j, k; x`+ l#
int mid = (l + r) / 2; AuDR |;i
if (l == r) >=~Fo)V!(V
return; mKq<'t]^k
if ((mid - l) >= THRESHOLD) dxn0HXU
mergeSort(data, temp, l, mid); qE`:b0FT
else gJPDNZ*6pk
insertSort(data, l, mid - l + 1); PM-PP8h
if ((r - mid) > THRESHOLD) Q6.*"`
mergeSort(data, temp, mid + 1, r); qTTn51
else <F)w=_%&
insertSort(data, mid + 1, r - mid); K)Zkj"y
1rv$?=Z
for (i = l; i <= mid; i++) { ,.oa,sku
temp = data; o'^;tLs15
} WHgV_o 8
for (j = 1; j <= r - mid; j++) { q)?p$\
temp[r - j + 1] = data[j + mid]; O+o;aa6
} 4aN+}TkH@G
int a = temp[l]; P#[IUXtT
int b = temp[r]; 4Hml.|$
for (i = l, j = r, k = l; k <= r; k++) { 'Gl;Ir^
if (a < b) { 0Q$~k
data[k] = temp[i++]; 'je8k7`VA
a = temp; ]^; b
} else { B9LSxB
data[k] = temp[j--]; ]M~8@K
b = temp[j]; *f`s%&Y]s
} i0'Xy>l
} U+.PuC[3
} .>kccLr:z
a:yB%:2
/** XhE$&Ff
* @param data abICoP1zQ
* @param l K}PvrcO1
* @param i rT flk
*/ (F,(]71Z+
private void insertSort(int[] data, int start, int len) { L2CW'Hd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gg}5$||^C
} p;qRm} 0}
} gHi~nEH
} N b3I%r
} ZI58XS+
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堆排序： n5bXQ
#)_J)/h
package org.rut.util.algorithm.support; _8[UtZYG
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import org.rut.util.algorithm.SortUtil; F2bm+0vOJ
X)Dqeb6
/** UsLh)#}h
* @author treeroot "JzfL(yt
* @since 2006-2-2 /&D'V_Q`*
* @version 1.0 rDIhpT)a
*/ K08 iPIkQ
public class HeapSort implements SortUtil.Sort{ Cq?',QU6j
_YH<YOrMh
/* (non-Javadoc) #0P!xZ'|{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2f3=?YqD
*/ v78&[
public void sort(int[] data) { *>e~_{F
MaxHeap h=new MaxHeap(); |x d@M-ln
h.init(data); j:HH#U
for(int i=0;i h.remove(); A$7Eo`Of
System.arraycopy(h.queue,1,data,0,data.length); Lzh9DYU6
} <ZigCo w
M[h1>}$Lz
private static class MaxHeap{ ,^.S0;D,Z
s8t f@H4r
void init(int[] data){ 5R,la\!bQ
this.queue=new int[data.length+1]; h`?y2?O
for(int i=0;i queue[++size]=data; E7rX1YdR
fixUp(size); o-SRSu
} C!!mOAhJ
} H9%l?r5
*I:mw8t
private int size=0; )UR1E?'
J#6LSD@(O
private int[] queue; n&_YYEHx
QjQ4Z'.r>
public int get() { |yLk5e~@-
return queue[1]; i[^k.W3gf
} 1KW3l<v-6
HR[Q ?rg
public void remove() { 'Z\{D*=V8
SortUtil.swap(queue,1,size--); .r~'(g{qt
fixDown(1); TT|-aS0l(u
} ob0~VEH-
file://fixdown LkaG8#m1R
private void fixDown(int k) { M$,Jg5Dc
int j; davvI$TA
while ((j = k << 1) <= size) { k?^%hO>[
if (j < size %26amp;%26amp; queue[j] j++; ,q8(]n4
if (queue[k]>queue[j]) file://不用交换 (-bRj#
break; N\_( w:q
SortUtil.swap(queue,j,k); "3@KRb4f
k = j; 9n_ eCb)H
} XK1fHfCEa
} 7k3p'FeS
private void fixUp(int k) { G-2EQ.
while (k > 1) { DZJeup?Z
int j = k >> 1; (F_w>w.h
if (queue[j]>queue[k]) Tc:sldtCk
break; q;p.wEbr4U
SortUtil.swap(queue,j,k); rW[SU:
k = j; 'yE*|Sx
} `/c7h16
} =Q@6c
PM@XtL7J
} j\! e9M
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} !0b%Jh
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SortUtil： 6%>/og\%
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package org.rut.util.algorithm; w-lrnjs
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import org.rut.util.algorithm.support.BubbleSort; yP x\ltG3
import org.rut.util.algorithm.support.HeapSort; 2.]~*7
import org.rut.util.algorithm.support.ImprovedMergeSort; P!5Z]+B#
import org.rut.util.algorithm.support.ImprovedQuickSort; AQ-mE9>P
import org.rut.util.algorithm.support.InsertSort; ^ b@!dS
import org.rut.util.algorithm.support.MergeSort; /n(9&'H<
import org.rut.util.algorithm.support.QuickSort; Pow|:Lau!
import org.rut.util.algorithm.support.SelectionSort; ,`<]>;s
import org.rut.util.algorithm.support.ShellSort; \kxh#{$z?
TNx_Rc}
/** \F[n`C"Is
* @author treeroot ?k"0w)8
* @since 2006-2-2 T\jAk+$Jo
* @version 1.0 mIRAS"Q!m
*/ C}9Kx }q
public class SortUtil { .U<F6I:<md
public final static int INSERT = 1; C]/&vh7ta
public final static int BUBBLE = 2; FK6K6wU52m
public final static int SELECTION = 3; k'x#t(
public final static int SHELL = 4; D 0
public final static int QUICK = 5; HQl~Dh0DJ
public final static int IMPROVED_QUICK = 6; I:nI6gF
public final static int MERGE = 7; WI6(#8^p
public final static int IMPROVED_MERGE = 8; zFOL(s.h|0
public final static int HEAP = 9; !Pw$48cg
q=njKC
public static void sort(int[] data) { ;:U<ce=
sort(data, IMPROVED_QUICK); O'OFz}x),
} +Jdm#n?_
private static String[] name={ Gp,'kw"I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :v_w!+,/
}; x=h0Fq,T
4HW;
private static Sort[] impl=new Sort[]{ )XpVu
new InsertSort(), b9y)wBC%`
new BubbleSort(), G,B?&gFX
new SelectionSort(), r4EoJyt
new ShellSort(), ~zMDY F"&
new QuickSort(), XwtAF3oz
new ImprovedQuickSort(), RYH)AS4w'
new MergeSort(), \p3v#0R{
new ImprovedMergeSort(), bGu([VB
new HeapSort() ~U9q-/(J/
}; 5\&]J7(
Uh}+"h5
public static String toString(int algorithm){ $.9 +{mz
return name[algorithm-1]; '<W<B!HP5Z
} !x8kB Di,
bfhz?,b
public static void sort(int[] data, int algorithm) { x df?nt
impl[algorithm-1].sort(data); GoazH?%
} "ct58Y@
T~h.=5
public static interface Sort { ^(DL+r,
public void sort(int[] data); J B(<.E2
} k&!6fZ)
$7Cgo&J
public static void swap(int[] data, int i, int j) { $,@JYLC2
int temp = data; y`6\L$c
data = data[j]; oJh"@6u6K
data[j] = temp; TVYz3~m
} i+I0k~wY
} ZL,6_L/