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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。 NT e5  
插入排序: .k%[4:Fe  
;[=8B \?  
package org.rut.util.algorithm.support; ^j31S*f&:  
L"o>wYx  
import org.rut.util.algorithm.SortUtil; gG*X^Uo  
/** P)Rh=U  
* @author treeroot <vONmE a  
* @since 2006-2-2 +trC,D  
* @version 1.0 1~Oe=`{&  
*/ x{n`^;Y1  
public class InsertSort implements SortUtil.Sort{ k <=//r  
6{n!Cb[e  
/* (non-Javadoc) VyzS^AH K  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =5/9%P8j9  
*/ ;<Ar=?  
public void sort(int[] data) { {`LU+  
int temp; `$,GzS(  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); S- pV_Ff  
} &PYK8}pBk3  
} D~hg$XzK  
} (tIo:j  
xJ>fm%{5  
} YG@t5j#b  
?OcJ )5C4  
冒泡排序: gl\\+VyU  
x3 q]I8q  
package org.rut.util.algorithm.support; =e9>FWf>  
9$cWU_q{  
import org.rut.util.algorithm.SortUtil; 6$kqaS##  
nuk*.Su  
/** v|uAzM{73  
* @author treeroot _P0T)-X\(  
* @since 2006-2-2 `UD/}j@  
* @version 1.0 Yw^m  
*/ oB}BU`-l  
public class BubbleSort implements SortUtil.Sort{ ^ DaBz\  
c6h.iBJ'  
/* (non-Javadoc) 8K:y\1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |TS>h wkI  
*/ n^Hm;BiE#  
public void sort(int[] data) { qTdheX/  
int temp; K^1oDP  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ;Lc Z`1  
if(data[j] SortUtil.swap(data,j,j-1); [pbo4e,4O  
} ULs\+U  
} \k.{-nh  
} >_[ 9t  
} Y<N5# );f  
aI P  
} 24 [+pu  
z* ^_)Z  
选择排序: VCV"S>aVf  
=bfJ^]R  
package org.rut.util.algorithm.support; E{XH?_xo  
'GNK"XA^  
import org.rut.util.algorithm.SortUtil; SheM|I~de  
TrlZ9?3#D  
/** Vr]id  
* @author treeroot '~5LY!H(pT  
* @since 2006-2-2 mk;&yh  
* @version 1.0 a!a-b~#cx  
*/ 3eb%OEMYk  
public class SelectionSort implements SortUtil.Sort { /5S30 |K  
r(:5kC8K  
/* %'b M){  
* (non-Javadoc) ?4+9fE<Q  
* L{X_^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T. }1/S"m  
*/ ^X=ar TE  
public void sort(int[] data) { Y\D!/T  
int temp; xcd#&  
for (int i = 0; i < data.length; i++) { K*%9)hq  
int lowIndex = i; /Gd=n  
for (int j = data.length - 1; j > i; j--) { ,BH@j%Jmy  
if (data[j] < data[lowIndex]) { HHA<IZ#;,  
lowIndex = j; i`(XLi}k  
} UbXh,QEG*  
} ?qP7Y nl  
SortUtil.swap(data,i,lowIndex); Yrb{ByO&  
} Q 8T]\6)m  
} m}C>ti`VD  
(uXL^oja  
} X.OD`.!>  
SzAJ2:qhl  
Shell排序: |9uOUE  
?Y$JWEPJ  
package org.rut.util.algorithm.support; ^|/TC!v]M  
02f~En}>6  
import org.rut.util.algorithm.SortUtil; B\=L3eL<D  
n&L+wqJ  
/** i5en*)O8  
* @author treeroot sGi"rg#  
* @since 2006-2-2 ];VA!++  
* @version 1.0 - \ 5v^l  
*/ RM]\+BK  
public class ShellSort implements SortUtil.Sort{ o15-ZzE-  
; ^*}#X d  
/* (non-Javadoc) :nh_k4S@v  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pj[PIz  
*/ Umz KY  
public void sort(int[] data) { Za/-i"U  
for(int i=data.length/2;i>2;i/=2){ `n.5f[wC  
for(int j=0;j insertSort(data,j,i); Qk0R a_  
} spGb!Y`mR  
} ZXu>,Jy  
insertSort(data,0,1); g$":D  
} BTl k Etm  
j5QuAU8  
/** hjU::m,WX  
* @param data |+"<wEKI  
* @param j ZEXc%-M  
* @param i P!$Zx)T  
*/ k o5@qNq  
private void insertSort(int[] data, int start, int inc) { ) mI05  
int temp; <>n0arAn  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); dl.N.P7}4  
} b1?#81  
} `uq8G  
} Z_PNI#h*  
4qN{n#{+]  
} Av @b!iw+  
_U$<xVnP  
快速排序: f"B3,6m  
~{*7"o/  
package org.rut.util.algorithm.support; IW)()*8;/  
214Ml0/%  
import org.rut.util.algorithm.SortUtil; t![7uU.W  
];}Wfl  
/** BmBj7  
* @author treeroot F@^~7ZmP`  
* @since 2006-2-2 lackB2J9 A  
* @version 1.0 *xc_k"\  
*/ +QB"8-  
public class QuickSort implements SortUtil.Sort{ d]`CxI]  
Y4%:7mw~=  
/* (non-Javadoc) v.\*./-i  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +[Dj5~V  
*/ OHv[#xGuV?  
public void sort(int[] data) { XoXM ^*Vk  
quickSort(data,0,data.length-1); s|@6S8E  
} qsL) }sC^8  
private void quickSort(int[] data,int i,int j){ 6~OoFm5  
int pivotIndex=(i+j)/2; Ulhk$CPA  
file://swap J`^ag'  
SortUtil.swap(data,pivotIndex,j); agkA}O  
&vHoRY  
int k=partition(data,i-1,j,data[j]); 3E7ULK  
SortUtil.swap(data,k,j); ;g8R4!J  
if((k-i)>1) quickSort(data,i,k-1); >AC]#'  
if((j-k)>1) quickSort(data,k+1,j); BMhy=+\  
%mL-$*  
} ^*S ,xP  
/** xrlmKSPa  
* @param data !P ~_Dl2d  
* @param i IOTR/anu  
* @param j @HT% n  
* @return CPgCjtY  
*/ OtSL*'7>  
private int partition(int[] data, int l, int r,int pivot) { lT4Hn;tnN  
do{ Cv }Qwy  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Ok>gh2e[c  
SortUtil.swap(data,l,r); jQk*8   
} :iFIQpk  
while(l SortUtil.swap(data,l,r); wNq;;AJ$  
return l; p/(~IC "!J  
} ~SQ?BoCI[  
zs%Hb48V   
} h H <J,Wn  
@vpf[j  
改进后的快速排序: CQwL|$)]Y  
AGH|"EWG  
package org.rut.util.algorithm.support; GRMiQa  
Tq NadHQ  
import org.rut.util.algorithm.SortUtil; .R)PJc5^  
j lp:lX  
/** /V=24\1Ky  
* @author treeroot fKp#\tCc y  
* @since 2006-2-2 ^BUYjq%(`  
* @version 1.0 qZ]pq2G  
*/ ;WgJ<&33  
public class ImprovedQuickSort implements SortUtil.Sort { RbCPmiZcH  
DvPlV q~  
private static int MAX_STACK_SIZE=4096; f} Np/  
private static int THRESHOLD=10; ;GVV~.7/  
/* (non-Javadoc) D,;\o7V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1mfs 4  
*/ \(VTt|}By$  
public void sort(int[] data) { ]V-W~r=  
int[] stack=new int[MAX_STACK_SIZE]; PGYXhwOI  
hj  
int top=-1; ?s\ OUr  
int pivot; qP2ekI:y  
int pivotIndex,l,r; -6Oz^  
'7D,m H  
stack[++top]=0; ^M%uV  
stack[++top]=data.length-1; 8i|w(5m;  
s"9`s_p`d  
while(top>0){ xfy1pS.[:  
int j=stack[top--]; {g2@6ct  
int i=stack[top--]; ^Y u6w\QM  
@+'-ADX  
pivotIndex=(i+j)/2; <EPj$::  
pivot=data[pivotIndex]; -od!J\ KCy  
'\Jj8oJQj  
SortUtil.swap(data,pivotIndex,j); BYO"u6  
T<JwD[ (  
file://partition D'L'#/hK  
l=i-1; )x}l3\s  
r=j; nL$x|}XAcj  
do{ K`/`|1  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 89n:)|rWq  
SortUtil.swap(data,l,r); D?C)BcN  
} +Vo}F  
while(l SortUtil.swap(data,l,r); rj6tZJZ#o0  
SortUtil.swap(data,l,j); KhCzD[tf  
VOc8q-hK  
if((l-i)>THRESHOLD){ :C}2=  
stack[++top]=i; ~XyW&@  
stack[++top]=l-1; [zL7Q^~  
} f6_];]yP  
if((j-l)>THRESHOLD){ ;<$H)`*  
stack[++top]=l+1; z >YFyu#LF  
stack[++top]=j; Di@GY!  
} 1iX)d)(b  
H;U)b{  
} za:a)U^n  
file://new InsertSort().sort(data); UK$ms~H  
insertSort(data); >iOzl wmG  
} y kW [B  
/**  U3izvM  
* @param data ]J* ,g,  
*/ i]=&  
private void insertSort(int[] data) { n:0}utU4  
int temp; rwniOQe  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); E,wVe[0)f  
} nI/kw%<  
} CW)Z[<d8  
} RrhT'':[  
RP 2_l$  
} yMZHUd  
FYb34LY  
归并排序: 65oWD-  
2>]a)  
package org.rut.util.algorithm.support; l{:a1^[>y  
Xt{*N-v\  
import org.rut.util.algorithm.SortUtil; ]&ixhW  
lJzl6&  
/** Aj9Ji"18za  
* @author treeroot YC=S5;  
* @since 2006-2-2 /({;0I*!i  
* @version 1.0 N7%TYs  
*/ ckjrk  
public class MergeSort implements SortUtil.Sort{ .6m "'m0;  
Uw/l>\  
/* (non-Javadoc) DY{cQb  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kzb`$CGK  
*/ x1gx$P  
public void sort(int[] data) { LhzMAW<L4  
int[] temp=new int[data.length]; Z~6[ Z  
mergeSort(data,temp,0,data.length-1); mmEp'E  
} sk2%  
.wK1El{bf  
private void mergeSort(int[] data,int[] temp,int l,int r){ [m'CR 4(|  
int mid=(l+r)/2; MS<SAD>w  
if(l==r) return ; 99OD= pxQ  
mergeSort(data,temp,l,mid); ~VTs:h  
mergeSort(data,temp,mid+1,r); Uh|>Skic4  
for(int i=l;i<=r;i++){ uH\kQ9f  
temp=data; {hqAnZ@]vr  
} !:fv>FEI9  
int i1=l; Omag)U)IPh  
int i2=mid+1; $E(XjuS  
for(int cur=l;cur<=r;cur++){ 9 1P4:6  
if(i1==mid+1) zuL7%qyv  
data[cur]=temp[i2++]; N dR ]  
else if(i2>r) :#="%  
data[cur]=temp[i1++]; |$hgT K[L  
else if(temp[i1] data[cur]=temp[i1++]; ,#'7)M D8  
else q42FP q  
data[cur]=temp[i2++]; GVd48*  
}  s&*yk p  
} d*;$AYI#R  
[@{0o+.]'H  
} IftxSaP  
3;$bS<>  
改进后的归并排序: 6Dm+'y]l  
_:,.yRez  
package org.rut.util.algorithm.support; +G!v!(Ob+  
~PUsgL^  
import org.rut.util.algorithm.SortUtil; Pe,;MP\2  
9H$g?';  
/** 8xo;E=`   
* @author treeroot YeIe\3x!N  
* @since 2006-2-2 nL;K|W  
* @version 1.0 Gm@iV,F%R  
*/ ~x+Ykq0  
public class ImprovedMergeSort implements SortUtil.Sort { 9 x [X<  
7ti<  
private static final int THRESHOLD = 10; /Hk07:"c  
1,u{&%yL"w  
/* n `#+L~X  
* (non-Javadoc) zg0%>iqO  
* gN\*Y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ![q }BU4  
*/ p[;8  
public void sort(int[] data) { KQW!\y?$"  
int[] temp=new int[data.length]; ~GYpa t  
mergeSort(data,temp,0,data.length-1); "0<Sd?Sz  
}  qV?sg  
0i _  
private void mergeSort(int[] data, int[] temp, int l, int r) { m\} =4b  
int i, j, k; cCYl$MskZ  
int mid = (l + r) / 2; J2Y 3er  
if (l == r) IPkA7VhFF  
return; rkP4<E-M  
if ((mid - l) >= THRESHOLD) (-#rFO5~l  
mergeSort(data, temp, l, mid); Vy&f"4~  
else "h`54 }0  
insertSort(data, l, mid - l + 1); _p$"NNFN  
if ((r - mid) > THRESHOLD) 3P3:F2S R  
mergeSort(data, temp, mid + 1, r); y 2cL2c$BT  
else &,_?>.\[<  
insertSort(data, mid + 1, r - mid); U"/yB8!W  
nxf {PbHk  
for (i = l; i <= mid; i++) { HUD7{6}4  
temp = data; ;*"!:GR%h  
} #efqG=q  
for (j = 1; j <= r - mid; j++) { jaL$LJV  
temp[r - j + 1] = data[j + mid]; @yCW8]  
} ;!^ +N  
int a = temp[l]; 9PUa?Bc`=  
int b = temp[r];  W{L  
for (i = l, j = r, k = l; k <= r; k++) { 5#yJK>a7  
if (a < b) { xcAF  
data[k] = temp[i++]; :,urb*  
a = temp; 0>I]=M]@  
} else { [0d-CEp[  
data[k] = temp[j--]; v&k>0lV, ^  
b = temp[j]; )PsN_ 42~  
} u-8X$aJ  
} ZTN:|IKT  
} L7i}Ga!8  
}R7sj  
/** /UEV8 1  
* @param data L$oia)%t-  
* @param l D{Hh#x8Y  
* @param i UY?i E=  
*/ e6tH/`Uln  
private void insertSort(int[] data, int start, int len) { ckH$E%j   
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [Ihp\!xqI  
} xn%l  
} }:,o Y<  
} fW_}!`:  
} ZXF AuF  
"N?%mCPI  
堆排序: 2VoEQ  
$|`t9-EA/  
package org.rut.util.algorithm.support; ~zXG<}n  
]7XkijNb  
import org.rut.util.algorithm.SortUtil; .}L-c>o"o  
el2*\(XT  
/** >z fq*_  
* @author treeroot @%I_&!d  
* @since 2006-2-2 zIAu3  
* @version 1.0 +d6Aw}*  
*/ I =tyQ`  
public class HeapSort implements SortUtil.Sort{ [*Aqy76Qa  
m>Yo 9/XpZ  
/* (non-Javadoc) .-O@UQx.I  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Omb :  
*/ Dr8WV \4@  
public void sort(int[] data) { o+"0.B  
MaxHeap h=new MaxHeap(); `wn<3#  
h.init(data); 8osS OOzM  
for(int i=0;i h.remove(); }rj C_q  
System.arraycopy(h.queue,1,data,0,data.length); n!l./>N  
} Oet#wp/I  
#Vn>ue+?  
private static class MaxHeap{ @aqd'O  
(_i vN  
void init(int[] data){ *D09P%  
this.queue=new int[data.length+1]; 6`s%%v  
for(int i=0;i queue[++size]=data; </+%R"`  
fixUp(size); {LB }v;?l  
} 1{hoO<CJ  
} YP$*;l  
mD^qx0o<  
private int size=0; @sg T[P*ut  
quCWc2pXX  
private int[] queue; wEHAkc)Q  
}`<>$2b  
public int get() { @ (u?=x;  
return queue[1]; JXSqtk=  
} Qa7S'(  
+/~\b/  
public void remove() { VhH]n yi7D  
SortUtil.swap(queue,1,size--); K9I,Q$&xX  
fixDown(1); \yX !P1  
} Kt4\&l-De  
file://fixdown @7HOL-i  
private void fixDown(int k) { rs 1*H  
int j; H/@M  
while ((j = k << 1) <= size) { Dt~}9HrU  
if (j < size %26amp;%26amp; queue[j] j++; xv#j 593  
if (queue[k]>queue[j]) file://不用交换 @R OY}CZ{/  
break; ,~j$rs`Z  
SortUtil.swap(queue,j,k); <v7KE*#  
k = j; ]}l+ !NV<  
} 0Yzb=QMD  
} "! 6 B5Oz  
private void fixUp(int k) { J! 6z  
while (k > 1) { -g[*wN8  
int j = k >> 1; da?th  
if (queue[j]>queue[k]) 4gv XJK-  
break;  > ^v8N  
SortUtil.swap(queue,j,k); :56lzsWUE<  
k = j; Tx!m6B`Y  
} DN 8pJa  
} 1uge>o&  
hv:Z%D |S  
} FTYLMQ i  
 hL{B9?  
} ][5p.owJse  
?jn6Op  
SortUtil: $9i5<16  
5B.??;xtaV  
package org.rut.util.algorithm; 7fzyD  
JdYF&~  
import org.rut.util.algorithm.support.BubbleSort; N evvA(M  
import org.rut.util.algorithm.support.HeapSort; c+)|o!d  
import org.rut.util.algorithm.support.ImprovedMergeSort; D_ZBx+/_?  
import org.rut.util.algorithm.support.ImprovedQuickSort; a=B0ytNm  
import org.rut.util.algorithm.support.InsertSort; \HQb#f,  
import org.rut.util.algorithm.support.MergeSort; >)A  
import org.rut.util.algorithm.support.QuickSort; Cm}UWX  
import org.rut.util.algorithm.support.SelectionSort; Isgk  
import org.rut.util.algorithm.support.ShellSort; Rw{v"n  
?{z$ { bD  
/** KP7RrgOan&  
* @author treeroot QRHm |f9_C  
* @since 2006-2-2 i|^`gly  
* @version 1.0 8B t-  
*/ x-#9i  
public class SortUtil { h-rj  
public final static int INSERT = 1; _]ttKT(  
public final static int BUBBLE = 2; q4ko}jn  
public final static int SELECTION = 3; ZznWs+  
public final static int SHELL = 4; \fR:+rbQ&|  
public final static int QUICK = 5; h16Nr x  
public final static int IMPROVED_QUICK = 6; 446hrzW>@  
public final static int MERGE = 7; *Z2Q]?:{ i  
public final static int IMPROVED_MERGE = 8; . _t,OX$  
public final static int HEAP = 9; n rB27  
> ,Bu^] C  
public static void sort(int[] data) { 5XUI7Q%  
sort(data, IMPROVED_QUICK); S^VV^O5 ^  
} : 8<^rP  
private static String[] name={ (*Q|;  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j2qfEvU  
}; P]x+Q  
o5x^"#  
private static Sort[] impl=new Sort[]{ a&VJ YAB  
new InsertSort(), K$5P_~;QL  
new BubbleSort(), g uWqHVSs  
new SelectionSort(), ZxPAu%Y  
new ShellSort(), q;Pz B4#  
new QuickSort(), kj=2+)!E7  
new ImprovedQuickSort(), T2;  9  
new MergeSort(), B "zg85 e  
new ImprovedMergeSort(), #7T={mh  
new HeapSort() eSBf;lr=  
}; d$~b`  
GZX!iT  
public static String toString(int algorithm){ N,Bs% p#1  
return name[algorithm-1]; )II,HT-LY  
} R_&z2I  
$*-L8An?  
public static void sort(int[] data, int algorithm) { rO%+)M$A  
impl[algorithm-1].sort(data); FRk_xxe"K  
} mXaUWgO  
.WE0T|qDX  
public static interface Sort { +[[gU;U"v  
public void sort(int[] data); ,peE'   
} GTNTx5H  
}TL"v|ny6;  
public static void swap(int[] data, int i, int j) { hI{Yg$H1  
int temp = data; xyz86r ^u  
data = data[j]; 7~f6j:{|z  
data[j] = temp; oU?X"B9  
} W%cPX0  
} d6&tz!f  
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