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[JAVA]用Java实现的各种排序

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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。 trE{FT  
插入排序: :T9< d er,  
aM4k *|H?  
package org.rut.util.algorithm.support; z2Z^~, i  
7=(Hy\Q5xH  
import org.rut.util.algorithm.SortUtil; a'\o 7_  
/** Mfv1Os:ST  
* @author treeroot t|m=J`a{q;  
* @since 2006-2-2 q{+_ <2U|  
* @version 1.0 10H)^p%3+  
*/ {/pm<k=  
public class InsertSort implements SortUtil.Sort{ ;NRF=d>  
*{+G=d  
/* (non-Javadoc) `O'`eY1f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4V~?.  
*/ Y3O#Q)-j$  
public void sort(int[] data) { -kbg\,PW  
int temp; %w7]@VZ  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); /a6Xa&(B  
} '}Ri`  
} S]E.KLR?[;  
} ur$l Z0  
[|l?2j\  
} r;m)nRu  
t'ZWc\  
冒泡排序: H<1WbM:w  
S6[v;{xJ  
package org.rut.util.algorithm.support; >|;aIa@9  
MeUaTJFEB  
import org.rut.util.algorithm.SortUtil; ?mlNL/:  
xC tmXo  
/** E }ZJ)V7  
* @author treeroot 0:b2(^]bg  
* @since 2006-2-2 RVeEkv[qp  
* @version 1.0 Gdg"gi!4  
*/ Ge<nxl<Bd  
public class BubbleSort implements SortUtil.Sort{ 3N_"rNKD  
Bp@v,)8*  
/* (non-Javadoc) Bm]8m=p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wgw(YU  
*/ QD%L0;j  
public void sort(int[] data) { <^$<#K d  
int temp; L QjsOo  
for(int i=0;i for(int j=data.length-1;j>i;j--){ yBI'djL~>  
if(data[j] SortUtil.swap(data,j,j-1); q/n,,!  
} Z> r^SWL  
} FHV-BuH5  
} ^+g$iM[`f  
} 5<w g 8y  
9*a=iL*Nw  
} 6&/T@LQYrh  
nMJ#<'v^!2  
选择排序: P+$:(I  
o*J3C>  
package org.rut.util.algorithm.support; l<);s  
A,4fEmWM  
import org.rut.util.algorithm.SortUtil; p}cw{  
y '!m4-  
/** k-}b{  
* @author treeroot 8Ac:_Zg  
* @since 2006-2-2 ~*wk6&|  
* @version 1.0 {D=@n4JO  
*/ 7nuU^wc  
public class SelectionSort implements SortUtil.Sort { `]W| 8M  
|6< p(i7  
/* 8]LD]h)B"  
* (non-Javadoc) Z4\=*ic@  
* l'eyq}&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8w.YYo8`  
*/ S9#)A->  
public void sort(int[] data) { Y0X-Zqk'  
int temp; %V nbmoO  
for (int i = 0; i < data.length; i++) { >FkWH7  
int lowIndex = i; 6H7],aMg$A  
for (int j = data.length - 1; j > i; j--) { 4#l o$#  
if (data[j] < data[lowIndex]) { !@v7Zu43,  
lowIndex = j; @mfEKU!  
} ynrT a..  
} ^U!0-y  
SortUtil.swap(data,i,lowIndex); Er{>p|n =  
} yNTK .  
} <%" b9T`'  
hq #?kN  
} r3PT1'P?L  
q*9!,!e  
Shell排序: LSRk7'0  
o !U 6?  
package org.rut.util.algorithm.support; }B1!gz$YNO  
j}C}:\-fY  
import org.rut.util.algorithm.SortUtil; Ct>GYk$  
){b@}13cF  
/** ruy}/7uf  
* @author treeroot V=*wKuB  
* @since 2006-2-2 <Sr  
* @version 1.0 [)TRTxFb  
*/ r! MWbFw|X  
public class ShellSort implements SortUtil.Sort{ N}t 2Nu-  
Ll4g[8  
/* (non-Javadoc) 5bg s*.s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sL$:"=  
*/ )<tI!I][j  
public void sort(int[] data) { S@/IQR  
for(int i=data.length/2;i>2;i/=2){ c.e2M/  
for(int j=0;j insertSort(data,j,i); i,/0/?)*_  
} mV pMh#zw  
} PGoh1Uu  
insertSort(data,0,1); BGX.U\uc  
} sdo [D  
nX`u[ks  
/** ] @u6HH~^  
* @param data +csi[c)3E  
* @param j #%h-[/  
* @param i #e$5d>j(  
*/ *vwbgJG! *  
private void insertSort(int[] data, int start, int inc) { W}mn}gTQ  
int temp; >: g3k  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); R)m'lMi|  
} D-._z:_  
} +O?KNZ  
} =7m)sxj]w  
~o~!+`@q  
} gK'1ZLdZ2  
OD!& .%  
快速排序: c$yk s  
CTZ8Da^  
package org.rut.util.algorithm.support;  cHk)i  
AiO$<CS  
import org.rut.util.algorithm.SortUtil; /x p|  
}xh$T'M8  
/** oc>{?.^  
* @author treeroot B e0ND2oo  
* @since 2006-2-2 [UWd W  
* @version 1.0 9j6QX ~,  
*/ )O@]uY  
public class QuickSort implements SortUtil.Sort{ VL` z[|e @  
ia+oX~W!VR  
/* (non-Javadoc) HK0! P*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Su/6Q$0 t  
*/ SSWP~ t  
public void sort(int[] data) { :x4|X8>  
quickSort(data,0,data.length-1); 2so!  
} 8b;1F Q'  
private void quickSort(int[] data,int i,int j){ f@|A[>"V  
int pivotIndex=(i+j)/2; 6"&6 `f  
file://swap "ozr+:#\  
SortUtil.swap(data,pivotIndex,j); t^G"f;Ra+  
&keR~~/  
int k=partition(data,i-1,j,data[j]); eEv@}1~  
SortUtil.swap(data,k,j); `ux{;4q  
if((k-i)>1) quickSort(data,i,k-1); I7n"&{s"*  
if((j-k)>1) quickSort(data,k+1,j); (<xfCH F5  
+{f:cea (1  
} @a0DT=>dT  
/** (G;l x  
* @param data U`NjPZe5^  
* @param i p o2!  
* @param j %D%8^Zd_  
* @return biU^[g("  
*/ -7@/[9Gf`:  
private int partition(int[] data, int l, int r,int pivot) { b((M)Gz  
do{ {CGUL|y  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 2Ay* kmW  
SortUtil.swap(data,l,r); tnN.:%mZ  
} >\P@^ h]  
while(l SortUtil.swap(data,l,r); wc}5m Hs  
return l; \kMefU  
} !W}9no  
zkuU5O  
} eo?;`7  
deV  8  
改进后的快速排序: 'm FqE n  
Z8@J`0x  
package org.rut.util.algorithm.support; xRzFlay8  
c]n1':FT"  
import org.rut.util.algorithm.SortUtil; 7'W%blg!V  
QLvHQtzwX  
/** jD<{t  
* @author treeroot uXJ;A *  
* @since 2006-2-2 vZaZc}AyL  
* @version 1.0 )f[ B6Y  
*/ =C8?M  
public class ImprovedQuickSort implements SortUtil.Sort { SwTL|+u  
}J:U=HJ  
private static int MAX_STACK_SIZE=4096; KyYMfC  
private static int THRESHOLD=10; Ybs\ES'?A  
/* (non-Javadoc) Mh:L$f0A%O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l3Q(TH~I  
*/ #*K}IBz  
public void sort(int[] data) { 8<pzb}xK  
int[] stack=new int[MAX_STACK_SIZE]; 9=8iy w  
lhAX;s&9  
int top=-1; t\~P:"  
int pivot; 6;\I))"[  
int pivotIndex,l,r; (a.z9nqGA  
i@)i$i4  
stack[++top]=0; 75f"'nJ)  
stack[++top]=data.length-1; d iL +:H  
1{ ~#H<K  
while(top>0){ 59Xi3KY  
int j=stack[top--]; s E2D#D  
int i=stack[top--]; 8 D3OOab  
)NXmn95  
pivotIndex=(i+j)/2; K/j3a[.  
pivot=data[pivotIndex]; K1"*.\?F  
=jOv] /  
SortUtil.swap(data,pivotIndex,j); t{^*6XOcJ  
cl=EA6P\X  
file://partition cu7hBf j  
l=i-1; "d#Y}@*~o  
r=j; 1PVtxL?1P  
do{ p*4':TFuD;  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); _~IR6dKE  
SortUtil.swap(data,l,r); ~?4PBq  
} S;3R S;  
while(l SortUtil.swap(data,l,r); QdH\LL^8R4  
SortUtil.swap(data,l,j); eL10Q(;P`  
z&#SPH*  
if((l-i)>THRESHOLD){ nBjqTud  
stack[++top]=i; I5 o)_nc  
stack[++top]=l-1; VRWAm>u  
} OE_XCZ!5P  
if((j-l)>THRESHOLD){ E4`N-3  
stack[++top]=l+1; ]qethaNy  
stack[++top]=j; L-jJg,eY  
} N..yQ-6x?  
H*RC@O_hv  
} dpAjR  
file://new InsertSort().sort(data); :~b3^xhc^  
insertSort(data); lGPUIoUo  
} Bn=by{i  
/** f2Klt6"9  
* @param data mXRB7k  
*/ }iXDa?6%  
private void insertSort(int[] data) { \\r)Ue]  
int temp; 2Nu=/tMN  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ] bM)t<  
} q+H%)kF  
} 6]V4muz#c  
} bU>U14ix<  
*g:4e3Iy  
} wa<MRt W=  
I WTwz!+  
归并排序: lGV0 *Cji  
/f:dv?!km  
package org.rut.util.algorithm.support; =)M/@T  
Hu\B"fdS  
import org.rut.util.algorithm.SortUtil; R0P iv:  
nOt&pq7  
/** zvYq@Mhr  
* @author treeroot yh Yb'GK  
* @since 2006-2-2 9oyE$S h]  
* @version 1.0 04LI]'  
*/ <{dVKf,e  
public class MergeSort implements SortUtil.Sort{ r@72|:,  
"Q}#^h]F  
/* (non-Javadoc) ^ZvWR%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p#ol*m5wE  
*/ nno}e/zqf  
public void sort(int[] data) { H7z,j}l  
int[] temp=new int[data.length]; )JDs\fUE  
mergeSort(data,temp,0,data.length-1); 9A/\h3HrJ  
} Hbj,[$Jb  
#X%~B'  
private void mergeSort(int[] data,int[] temp,int l,int r){ }6p@lla,%]  
int mid=(l+r)/2; PXK7b2fE.  
if(l==r) return ; 6_J$UBT  
mergeSort(data,temp,l,mid); ^Ew]uN>,  
mergeSort(data,temp,mid+1,r); 8UXjm_B^'  
for(int i=l;i<=r;i++){ @)UZ@ ~R  
temp=data; 8ZM?)# `@{  
} 5m*iE*+  
int i1=l; WQ~;;.v#  
int i2=mid+1; <Y*+|T+&d  
for(int cur=l;cur<=r;cur++){ :=}US}H$  
if(i1==mid+1) `>gd&u  
data[cur]=temp[i2++]; K$&s=Hm  
else if(i2>r) ~xA-V4.  
data[cur]=temp[i1++]; )bS~1n_0  
else if(temp[i1] data[cur]=temp[i1++]; wF IegC(  
else q$ZHd  
data[cur]=temp[i2++]; G3+.H  
} "9m2/D`=  
} sNj)ZWgd>  
3*]eigi)  
} *S]Ci\{_  
Q}1 R5@7  
改进后的归并排序: [=E  
&R[ M c-2  
package org.rut.util.algorithm.support; -d~4A  
FK:;e lZ  
import org.rut.util.algorithm.SortUtil; dU6ou'p f  
,p4&g)o  
/** 2"0es40;0  
* @author treeroot un)4eo!7  
* @since 2006-2-2 V^7V[(~`  
* @version 1.0 9 8j>1 "8  
*/ ~T ]m>A!  
public class ImprovedMergeSort implements SortUtil.Sort { 88VZR&v   
$}<PL}+  
private static final int THRESHOLD = 10; =@m &s^R  
.Obw|V-  
/* udxFz2>_l$  
* (non-Javadoc) J5di[nu  
* gi(H]|=a  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NgADKrDU  
*/ $LKIT0  
public void sort(int[] data) { }O/U;4Z  
int[] temp=new int[data.length]; hLI`If/+K  
mergeSort(data,temp,0,data.length-1); W}--p fG  
} qmnZAk  
jq-p;-i  
private void mergeSort(int[] data, int[] temp, int l, int r) { ZO!I.  
int i, j, k; Qt iDTr  
int mid = (l + r) / 2; <A[E:*`*  
if (l == r) VO,!x~S!  
return; RS"H8P 4W  
if ((mid - l) >= THRESHOLD) e>7]w,*|  
mergeSort(data, temp, l, mid); u}>#Eb  
else |S_T^'<W  
insertSort(data, l, mid - l + 1); 2VF%@p  
if ((r - mid) > THRESHOLD) B268e  
mergeSort(data, temp, mid + 1, r); k >F'ypm  
else bBu,#Mc  
insertSort(data, mid + 1, r - mid); @PN#p"KaT  
g'p K  
for (i = l; i <= mid; i++) { +1Vjw'P  
temp = data; CAWA3fcQp  
} iocI:b <  
for (j = 1; j <= r - mid; j++) { 03xa'Of>  
temp[r - j + 1] = data[j + mid]; O?NeSx 1  
} N8!cO[3Oh  
int a = temp[l]; dA-2%uJ  
int b = temp[r]; *YW/_  
for (i = l, j = r, k = l; k <= r; k++) { 2{]`W57_=  
if (a < b) { _,zA ^*b  
data[k] = temp[i++]; Mx6@$tQ%  
a = temp; 6,"IDH|ND  
} else { \qR7mI/*  
data[k] = temp[j--]; T:t]"d}}  
b = temp[j]; 4FEk5D  
} ?f#y1m  
} /+8JCp   
} uG?_< mun  
$u7; TW6QD  
/** DamC F  
* @param data r^h4z`:L  
* @param l x N=i]~  
* @param i ]Gpxhg  
*/ Yb:\a/ y  
private void insertSort(int[] data, int start, int len) { P#pn*L*"T  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E>&n.%  
} %dJX-sm@  
} 7x#Ckep:I  
} 3Th'paMG  
} 09dK0H3(  
m/v9!'cMI  
堆排序: /4tj3B,  
gfX\CSGy  
package org.rut.util.algorithm.support; [!!o-9b  
if}-_E<F  
import org.rut.util.algorithm.SortUtil; `o<' x.I  
=2[7 E  
/** EzDk}uKY0R  
* @author treeroot r9X?PA0f  
* @since 2006-2-2 Ae mDJ8Y  
* @version 1.0 J+[_Wd  
*/ 4?0vso*X<:  
public class HeapSort implements SortUtil.Sort{ ">~.$Jp_4  
7Ok;Lt!x  
/* (non-Javadoc) cS>e?  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^9^WuSq  
*/ &@%W29:  
public void sort(int[] data) { UH]l9Aq$P  
MaxHeap h=new MaxHeap(); 9!T[Z/}T  
h.init(data); *j]9vktH  
for(int i=0;i h.remove(); eL^.,H0  
System.arraycopy(h.queue,1,data,0,data.length); NxjB/N  
} e&7JpT  
/[O(ea$U  
private static class MaxHeap{ PH`9MXh  
="x\`+U  
void init(int[] data){ 'pm2n0  
this.queue=new int[data.length+1]; m6n?bEl6I  
for(int i=0;i queue[++size]=data; wm]^3q I2  
fixUp(size); MG[o%I96  
} Ne#WI'  
} +lJG(Qd  
p+l!6  
private int size=0; ElS9?Q+  
r~N"ere26  
private int[] queue; )A!>=2M `  
(EK"V';   
public int get() { OC1I&",Ai|  
return queue[1]; }-ftyl7  
} KiI!frm1  
HHiT]S9  
public void remove() { XID<(HBA"!  
SortUtil.swap(queue,1,size--); Z^V6K3GSz-  
fixDown(1); N5*u]j  
} +u!0rLb  
file://fixdown XS`M-{f`  
private void fixDown(int k) { s >e=?W  
int j; Wi[~fI8^!  
while ((j = k << 1) <= size) { "J+3w  
if (j < size %26amp;%26amp; queue[j] j++; ~2<7ZtV=  
if (queue[k]>queue[j]) file://不用交换 ]d,S749(s  
break; >2~+.WePu  
SortUtil.swap(queue,j,k); uvtF_P/  
k = j; lrnyk(M}Q.  
} *F ? 8c  
} U"q/rcA  
private void fixUp(int k) { )E6;-rD0^+  
while (k > 1) { b`)){LR  
int j = k >> 1; m_=$0m J$  
if (queue[j]>queue[k]) ^dP KDrKxh  
break; *:>"q ej  
SortUtil.swap(queue,j,k); mocI&=EF2X  
k = j;  -QOw8vm  
} {LX.iH9}l  
}  Mu2  
Sl-v W  
} `VKf3&|<A  
AFc$%\s4  
} Vnx,5E&  
?"zY" *>4  
SortUtil: t<~$  
f@8>HCI  
package org.rut.util.algorithm; Vl_:c75"  
}@Ge}9$ h  
import org.rut.util.algorithm.support.BubbleSort; 'a$Gv&fu  
import org.rut.util.algorithm.support.HeapSort; hGd<<\  
import org.rut.util.algorithm.support.ImprovedMergeSort; {Z3dF)>  
import org.rut.util.algorithm.support.ImprovedQuickSort; |~'IM3Jw(Y  
import org.rut.util.algorithm.support.InsertSort; M@4UGM`J  
import org.rut.util.algorithm.support.MergeSort; j'%$XvI  
import org.rut.util.algorithm.support.QuickSort; z |a sa*  
import org.rut.util.algorithm.support.SelectionSort; Lg~B'd8m  
import org.rut.util.algorithm.support.ShellSort; w4W_iaU  
`!D s6  
/** CamE'  
* @author treeroot ?_"+^R z  
* @since 2006-2-2 j7sKsbb  
* @version 1.0 0G7K8`a  
*/ u}!@ ,/)  
public class SortUtil { 'd+N Vj{C  
public final static int INSERT = 1; 0$7s^?G0  
public final static int BUBBLE = 2; mjWU0Gh%*  
public final static int SELECTION = 3; 66.5QD0  
public final static int SHELL = 4; e&>;*$)  
public final static int QUICK = 5; N@O8\oQG  
public final static int IMPROVED_QUICK = 6; p"l3e9&'j  
public final static int MERGE = 7; 3l3+A+ n  
public final static int IMPROVED_MERGE = 8; @;<ht c  
public final static int HEAP = 9; jV? }9L^;  
PQK(0iCo4  
public static void sort(int[] data) { k]5Bykf`Ky  
sort(data, IMPROVED_QUICK); .C2TQ:B,.  
} kGd<5vCs  
private static String[] name={ iXj o[Rz^C  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OfctoPP _0  
}; +n<k)E@>J  
]%BWIqbr  
private static Sort[] impl=new Sort[]{ dxZu2&gi  
new InsertSort(), Ix(?fO#uNF  
new BubbleSort(), Gm9hYhC8  
new SelectionSort(), ?[)}l9  
new ShellSort(), zX0md x<|<  
new QuickSort(), <$F\Nk|x  
new ImprovedQuickSort(), yY[<0|o u  
new MergeSort(), JJ{9U(`_y6  
new ImprovedMergeSort(), (FJ9-K0b{n  
new HeapSort() 4m*M,#mV  
}; d?:=PH  
*xON W  
public static String toString(int algorithm){ %F:)5gT?  
return name[algorithm-1]; EhO|~A*R  
} E<C&Cjz:H  
U Z|HJ8_  
public static void sort(int[] data, int algorithm) { dbOdq  
impl[algorithm-1].sort(data); hQ(qbt{e  
} 'ihhoW8  
Qu} W/j|3  
public static interface Sort { 1Wm)rXW[x  
public void sort(int[] data); *+uHQgn(  
} O~59FuL  
1gmt2>#v%  
public static void swap(int[] data, int i, int j) { ?Y:8eD"*  
int temp = data; 94 e): jS  
data = data[j]; 2Fz|fW_  
data[j] = temp; [8Qro8  
} =QK$0r]c'k  
} H"C[&r  
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