[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; `)` n(B
} <%($7VMev
int i1=l; "|Xk2U
int i2=mid+1; os,* 3WO
for(int cur=l;cur<=r;cur++){ }#.L7SIJ<J
if(i1==mid+1) y603$Cv
data[cur]=temp[i2++]; kB3H="3[[
else if(i2>r) m4aB*6<lq
data[cur]=temp[i1++]; ZZk=E4aae
else if(temp[i1] data[cur]=temp[i1++]; [ad@*KFxy3
else aAJU`=uq
data[cur]=temp[i2++]; I`p+Qt
} C3eR)Yh
} 61.Brp.eP
w,w{/T+B
} j:5=s%S
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改进后的归并排序: pi /g H
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package org.rut.util.algorithm.support; F5?m6`g?
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import org.rut.util.algorithm.SortUtil; vtw6FX_B
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/** FB _pw!z
* @author treeroot s8-<m,*
* @since 2006-2-2 _(Sa4Vb=Q6
* @version 1.0 HGXt
*/ >*]Hq.&8
public class ImprovedMergeSort implements SortUtil.Sort { WP?TX b`5
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private static final int THRESHOLD = 10; Ey_" ~OB
yOphx07 (
/* 74H)|Dkx
* (non-Javadoc) %70~M_
* L%BNz3:Dt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TatpXN\
*/ }2<r,
public void sort(int[] data) { Anscr
int[] temp=new int[data.length]; [K9'<Qnu
mergeSort(data,temp,0,data.length-1); KAC6Snu1
} IOb*GTb
|zR8rqBX;
private void mergeSort(int[] data, int[] temp, int l, int r) { s>0't
int i, j, k; T,]7ICF#
int mid = (l + r) / 2; j/>$,
if (l == r) $>GgB`
return; p;._HJ(
if ((mid - l) >= THRESHOLD) :z4)5= 6M
mergeSort(data, temp, l, mid); q<\,
else 3AQZRul
insertSort(data, l, mid - l + 1); )=5ng-
if ((r - mid) > THRESHOLD) 3{ LP?w:@
mergeSort(data, temp, mid + 1, r); 1y-y6q
else K<pV
insertSort(data, mid + 1, r - mid); }2(,K[?
h!&prYx
for (i = l; i <= mid; i++) { "SzdDY6
temp = data; YQ39A_e g
} ~MS\
for (j = 1; j <= r - mid; j++) { '`eO\huf
temp[r - j + 1] = data[j + mid]; F">Qpgt
} 7]9 a<
int a = temp[l]; 7bk%mQk
int b = temp[r]; &GlwC%$S
for (i = l, j = r, k = l; k <= r; k++) { G>wqt@%r9
if (a < b) { nyBJb(5"B
data[k] = temp[i++]; >?6&c
a = temp; &$]vh
} else { #gp,V#T
data[k] = temp[j--]; HR ;)|j{!
b = temp[j]; ROk5]b.
} _h X]%
} m\$\ 09
} 4T!+D
V#cqRE3XNi
/** Hz.(qW">5*
* @param data y>72{
* @param l 3~}uqaGt
* @param i KcK>%%
*/ mH Ic f{RG
private void insertSort(int[] data, int start, int len) { ix(=3/Dgz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ag*mG*Z
} LUC4=kk4
} (xVsDAp=@
} |P -8HlOr
} #$c Rkw
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堆排序： 0JlZs]
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package org.rut.util.algorithm.support; t?9v^vFR
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import org.rut.util.algorithm.SortUtil; ~.UrL(l=
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/** 0%m)@ukb
* @author treeroot $% 1vW=d
* @since 2006-2-2 <Wp QbQM
* @version 1.0 ow_djv:,
*/ Bx/L<J@
public class HeapSort implements SortUtil.Sort{ `e(vH`VZ
Xlb0/T<g!
/* (non-Javadoc) .Fnwm}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1jc, Y.mP
*/ yqi^>Ce0
public void sort(int[] data) { "FTfk
MaxHeap h=new MaxHeap(); R}lsnX<
h.init(data); [P 06lIO
for(int i=0;i h.remove(); w9,iq@
System.arraycopy(h.queue,1,data,0,data.length); 2 !At2P2
} VUhbD
Xtp"QY p
private static class MaxHeap{ uO=aaKG
+"8,Mh
void init(int[] data){ \ gLHi~
this.queue=new int[data.length+1]; |b*? qf
for(int i=0;i queue[++size]=data; ^4,a8`
fixUp(size); )hk
} tI7:5Cm
} G3rj`Sg^c
hi0R.V&
private int size=0; L+CyQq
TZ2=O<Kj
private int[] queue; :'*DPB-
4dhvFGlW
public int get() { `67[O4$<
return queue[1]; 6IWxPt~
} {%IExPJ
r=6v`)Qr
public void remove() { /)dFK~
SortUtil.swap(queue,1,size--); >2]JXLq
fixDown(1); 'A:x/iv}^
} DqX{'jj
file://fixdown h=(DX5:A
private void fixDown(int k) { F0:A]`|
int j; 'k4E4OB
while ((j = k << 1) <= size) { cOPB2\,
if (j < size %26amp;%26amp; queue[j] j++; "dI;
if (queue[k]>queue[j]) file://不用交换 xia|+
break; ap{2$k ,
SortUtil.swap(queue,j,k); O9g{+e`
k = j; PJ2qfYsH=>
} Pv<24:ao
} t 0-(U\
private void fixUp(int k) { F$^Su<w5l
while (k > 1) { NcP.;u;`
int j = k >> 1; jK' N((Hz
if (queue[j]>queue[k]) QK+(g,)_86
break; 40|,*wi
SortUtil.swap(queue,j,k); rtL}W__
k = j; jq+A-T}@
} &NSY9'N,
} 2^)1N>"g
bzvh%RsW
} OX"j#
J]q%gcM
} Bf$_XG3
!YP@m~
SortUtil： RKPD4e>%
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package org.rut.util.algorithm; <a[Yk 2
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import org.rut.util.algorithm.support.BubbleSort; tOOchu?=
import org.rut.util.algorithm.support.HeapSort; #^4,GLIM
import org.rut.util.algorithm.support.ImprovedMergeSort; KL ?@@7
import org.rut.util.algorithm.support.ImprovedQuickSort; hRq3C1mR
import org.rut.util.algorithm.support.InsertSort; Q7g>4GZC
import org.rut.util.algorithm.support.MergeSort; z Nl ,
import org.rut.util.algorithm.support.QuickSort; !o>H1#2l
import org.rut.util.algorithm.support.SelectionSort; tw(JZDc
import org.rut.util.algorithm.support.ShellSort; Vp<seO;7o
l$YC/bP
/** m~>Y{F2
* @author treeroot 3mSXWl^?
* @since 2006-2-2 ?h0X,fl3
* @version 1.0 rLU/W<F8
*/ R@wjccu
public class SortUtil { XTd3|Pm
public final static int INSERT = 1; u-1;'a
public final static int BUBBLE = 2; cS.-7
public final static int SELECTION = 3; TI !a)X
public final static int SHELL = 4; |TE}`?y[g
public final static int QUICK = 5; gh>>Ibf
public final static int IMPROVED_QUICK = 6; 1lsLJ4P
public final static int MERGE = 7; C_ \q?>
public final static int IMPROVED_MERGE = 8; 3&x-}y~sg
public final static int HEAP = 9; af|5n><~A
]7Fs$y.
public static void sort(int[] data) { NO] 3*
sort(data, IMPROVED_QUICK); siTX_`0
} c,Euv>*`
private static String[] name={ .@"q$\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @w>zF/
}; WsFk:h'r
up2+s#
private static Sort[] impl=new Sort[]{ (Z}>1WRju
new InsertSort(), nkv(~ej(
new BubbleSort(), @vMA=v7a
new SelectionSort(), kqb0>rYa
new ShellSort(), O8]'o*<]
new QuickSort(), OgcHS?
new ImprovedQuickSort(), \j2;4O?`
new MergeSort(), hb/]8mR
new ImprovedMergeSort(), NjE</Empb%
new HeapSort() v?c 0[+?
}; g}f9dB,F
{ls+dx/
public static String toString(int algorithm){ dtPoo\@
return name[algorithm-1]; "Pl9nE
} >3gi yeJ
GdVhK:<>
public static void sort(int[] data, int algorithm) { j,d*?'X
impl[algorithm-1].sort(data); )>7%pz
} o&hIHfZri
Jd,)a#<j
public static interface Sort { f1PN|
public void sort(int[] data); E`j-6:
} }YOL"<,:o
~Z ~v
public static void swap(int[] data, int i, int j) { 1 ^g t1o
int temp = data; |+U<S~
data = data[j]; HP.E3yYK
data[j] = temp; +Ug/rtK4
} Kd3?I5t
} 0Y]0!}