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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。 rt.[,m  
插入排序: .~<]HAwq  
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package org.rut.util.algorithm.support; f'_ S1\  
\!PV*%P  
import org.rut.util.algorithm.SortUtil; Jr?!Mh-  
/** t,Q'S`eTU  
* @author treeroot A+2oh3  
* @since 2006-2-2 TzY!D *%z  
* @version 1.0 ,kE=TR.|  
*/ Tf l;7w.(A  
public class InsertSort implements SortUtil.Sort{ 7|~:P $M  
QN #)F  
/* (non-Javadoc) :0dfB&7  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !fZLQc  
*/ { y/-:=S)A  
public void sort(int[] data) { \\iK'|5YG  
int temp; (HSw%e  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ]PVt o\B=  
} RIo'X@zb  
} 00qZw?%K  
} QZ0R:TY  
V85.DK!  
} yM17H\=  
C 38XQLC  
冒泡排序: `(T!>QVW+g  
4 m $sJ  
package org.rut.util.algorithm.support; SY8U"Qc;9  
R9E6uz.j  
import org.rut.util.algorithm.SortUtil; P'FKk<  
b6Xi  
/** F G _,  
* @author treeroot {9{J^@@  
* @since 2006-2-2 $O]^Xm3{@  
* @version 1.0 g 2#F_  
*/ M\jB)@)  
public class BubbleSort implements SortUtil.Sort{ %(NN *o9"q  
dk4D+*R  
/* (non-Javadoc) UFk!dK+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pg5&=  
*/ 7uA\&/ ,  
public void sort(int[] data) { '{W3j^m7  
int temp; KT%{G8Y@M  
for(int i=0;i for(int j=data.length-1;j>i;j--){ KE#$+,?  
if(data[j] SortUtil.swap(data,j,j-1); QB9A-U <J  
} %O Fj  
} 0w+5'lOg  
} 2@5A&b  
} \086O9  
ip674'bq7R  
} K /8qB~J*  
6*V8k%H  
选择排序: }2mI*"%)\u  
GM77Z.Y  
package org.rut.util.algorithm.support; Q.>/*8R;  
5d(qtFH1  
import org.rut.util.algorithm.SortUtil; ef,F[-2^o  
Ki63Ox^O  
/** @Z"?^2  
* @author treeroot iU,/!IQ  
* @since 2006-2-2 _4Ii5CNNU  
* @version 1.0 ~Q_F~0y  
*/ ' me:Zd  
public class SelectionSort implements SortUtil.Sort { LAos0bc)w\  
.c|9..Cq=  
/* N@}gLBf  
* (non-Javadoc) ]p}#NPe5  
* AO^]>/7ed  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oM2|]ew)  
*/ M!-q}5';  
public void sort(int[] data) { "s> >V,  
int temp; O68bzi]  
for (int i = 0; i < data.length; i++) { "TUPYFK9  
int lowIndex = i; )L|C'dJ<k`  
for (int j = data.length - 1; j > i; j--) { 4^`PiRGt  
if (data[j] < data[lowIndex]) { +{'lZa  
lowIndex = j; R^|!^[WE  
} 9Dy)nm^  
} srhFEmgN7)  
SortUtil.swap(data,i,lowIndex); !4_!J (q%  
} ` -yhl3si  
} cJ2y)`  
%5`r-F  
} G IK u  
QT7_x`#J~o  
Shell排序: s5nB(L*Pjp  
8KZ$ F>T]>  
package org.rut.util.algorithm.support; Pb3EnNqYbM  
 w}"!l G  
import org.rut.util.algorithm.SortUtil; |E? ,xWN  
0}6QO  
/** 1x8(I&i  
* @author treeroot U>bP}[&S  
* @since 2006-2-2  &Q<EfB  
* @version 1.0 Rnz8 f}  
*/ $m{{,&}k  
public class ShellSort implements SortUtil.Sort{ OX`?<@6  
h<GyplG  
/* (non-Javadoc) wXP_]-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x Ridc^  
*/ %;'~%\|dZM  
public void sort(int[] data) { 2$iw/ r  
for(int i=data.length/2;i>2;i/=2){ QZ#3Bn%B5  
for(int j=0;j insertSort(data,j,i); :l4^iSf  
} B*32D8t`u  
} Ia=&.,xub  
insertSort(data,0,1); RFhU#  
} gYRqqV  
|G>q:]+AV  
/** 5s#R`o %Z  
* @param data <\+Po<)3j  
* @param j fmtuFr^a1  
* @param i yY'gx|\  
*/ 3Gj(z:)b  
private void insertSort(int[] data, int start, int inc) { /7.wQeL9  
int temp; tP&{ J^G  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); b8eDD+ulk  
} gQu\[e%mVo  
} ?`za-+<r<  
} ZDW,7b% U  
#W_i{bdO  
} SnH:(tO[X  
GOUY_&}tL  
快速排序: =;kRk .qzy  
i:MlD5 F  
package org.rut.util.algorithm.support; l kI8 {  
2Y9y5[K,F)  
import org.rut.util.algorithm.SortUtil; "tqS|ok.  
b(g_.1[  
/** Ar\IZ_Q  
* @author treeroot ,oC= {^l{  
* @since 2006-2-2 Bidqf7v  
* @version 1.0 6(\q< fx  
*/ q] 2}UuM|U  
public class QuickSort implements SortUtil.Sort{ "K9vm^xP  
UDhwnGTq(l  
/* (non-Javadoc) W ]a7&S  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FRb&@(;  
*/ ;JMOsn}8  
public void sort(int[] data) { /%2:+w  
quickSort(data,0,data.length-1); ?,.HA@T%  
} \Mobq  
private void quickSort(int[] data,int i,int j){ E|KLK4 ]  
int pivotIndex=(i+j)/2; BnY\FQ)K  
file://swap V5hp Y ]  
SortUtil.swap(data,pivotIndex,j); ?FkQe~FN{  
N:m@D][/sW  
int k=partition(data,i-1,j,data[j]); <|mE9u  
SortUtil.swap(data,k,j); 5JJg"yuY"  
if((k-i)>1) quickSort(data,i,k-1); l|4xKBCV]  
if((j-k)>1) quickSort(data,k+1,j); H[>klzh6 !  
f(EYx)gZ  
} s^{{@O.  
/** |6\FI?  
* @param data V2WUM+`uT  
* @param i @h,h=X  
* @param j ^(E"3 c  
* @return EKeBTb  
*/ 3C E 39W  
private int partition(int[] data, int l, int r,int pivot) { sa\|"IkD2  
do{ Enq6K1@%G  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); n_e}>1_  
SortUtil.swap(data,l,r); ,U} 5  
} ' lQ  
while(l SortUtil.swap(data,l,r); 3j[w -Lfp  
return l; #n6FQ$l8m  
} hlABu)B'1  
_47j9m]f  
} r"Hbr Qn  
X^?|Sz<^E  
改进后的快速排序: gPA>*;?E;@  
v@}1WGY  
package org.rut.util.algorithm.support; >" PqQO  
'@3a,pl  
import org.rut.util.algorithm.SortUtil; i-K"9z| )  
1{;[q3a  
/** =Qjw.6@  
* @author treeroot \4]zNV ~x  
* @since 2006-2-2 &r 5&6p  
* @version 1.0 mmpr]cT@'k  
*/ dA_V:HP  
public class ImprovedQuickSort implements SortUtil.Sort { RGx]DP$5G  
,6%hu|Y*  
private static int MAX_STACK_SIZE=4096; xPn'yo  
private static int THRESHOLD=10; O?4vC5x  
/* (non-Javadoc) [F BCz>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5kRwSOG%'  
*/ YI? C-,  
public void sort(int[] data) { *'AS^2'  
int[] stack=new int[MAX_STACK_SIZE]; ;?O883@r8  
xqi*N13  
int top=-1; ]IbPWBX  
int pivot; ^R8U-V8:  
int pivotIndex,l,r; ~_# Y,)S!z  
d =B@EyN  
stack[++top]=0; J;Z>fAE7  
stack[++top]=data.length-1; yccuTQvz  
Wzf1-0t  
while(top>0){ f3%^-Uy*b  
int j=stack[top--]; S,)|~#5x  
int i=stack[top--]; ` + n  
Zh fD`@>&  
pivotIndex=(i+j)/2; ="'P=Xh!8  
pivot=data[pivotIndex]; J6^Ct  
JPoK\- 9NT  
SortUtil.swap(data,pivotIndex,j); 9 z8<[>  
 i?i7T`  
file://partition iz%A0Z+`bg  
l=i-1; Vm,f3~  
r=j; 3Q!J9t5dc  
do{ w$U/;C  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 4, *^QK  
SortUtil.swap(data,l,r); \+evZ{Pu  
} y}:)cA~o(y  
while(l SortUtil.swap(data,l,r); H2FFw-xW  
SortUtil.swap(data,l,j); DESViQM  
LGo@F;!n  
if((l-i)>THRESHOLD){ +~i+k~{`H  
stack[++top]=i; 0:B^  
stack[++top]=l-1; mrLx]og,  
} 057G;u/  
if((j-l)>THRESHOLD){ /i~^LITH  
stack[++top]=l+1; lu@>?,<  
stack[++top]=j; SJ WP8+  
} 'Kso@St`o  
E23 Yk?"  
} 4W//Oc@e  
file://new InsertSort().sort(data); XnI ;7J  
insertSort(data); "jQe\  
} "<jEI /  
/** mZ0oa-Iy  
* @param data % Dr4~7=7a  
*/ 0@FM^ejA#  
private void insertSort(int[] data) { e ka@?`  
int temp; :?:j$ =nWN  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ,O&PLr8cJ?  
} ^ yukn*L  
} a+>W  
} N;`[R>Z~  
K9qEi{[  
} Ignv|TYG  
U3j~}H.D1  
归并排序: ch,Zk )y:_  
D`~{[cv)\  
package org.rut.util.algorithm.support; iP? ASqo{  
5q_OuZ/6  
import org.rut.util.algorithm.SortUtil; Uh|__DUkh  
}MavI'  
/** w[$nO#  
* @author treeroot b\0Q:  
* @since 2006-2-2 .dKRIFo  
* @version 1.0 yL3<X w|  
*/ ?"8A^ ^  
public class MergeSort implements SortUtil.Sort{ WO(&<(?  
}jY[| >z  
/* (non-Javadoc) cVHE}0Xd(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %}ApO{  
*/ EAd:`X,Y  
public void sort(int[] data) { =Z>V}`n  
int[] temp=new int[data.length]; -ynLuq#1A  
mergeSort(data,temp,0,data.length-1); ]-5jgz"  
} 0i Z9a/v  
"O*W]e  
private void mergeSort(int[] data,int[] temp,int l,int r){ %`\_l  
int mid=(l+r)/2; mv%:[+!  
if(l==r) return ; ,pa&he  
mergeSort(data,temp,l,mid); |Q)w3\S$  
mergeSort(data,temp,mid+1,r); t-4 R7`A<  
for(int i=l;i<=r;i++){ JJHvj=9'o  
temp=data; %Rsf6rJ  
} =Wy`X0h  
int i1=l; ! 7*_Z=  
int i2=mid+1; J_[[BJ&}x  
for(int cur=l;cur<=r;cur++){ ]z q_gV8k  
if(i1==mid+1) PD T\Q\J^X  
data[cur]=temp[i2++]; +-!|%jG`%v  
else if(i2>r) b`W'M :$  
data[cur]=temp[i1++]; ?^$4)Y>Kf  
else if(temp[i1] data[cur]=temp[i1++]; ^.1VhTB  
else C.B}Py+   
data[cur]=temp[i2++]; nk3<]u  
} aCi^^}!  
} pn%|;  
TX [%s@C  
} qD%&\ZT  
-b>O4_N  
改进后的归并排序: n `T[eb~  
NDa|.,  
package org.rut.util.algorithm.support; (F '  
8~Hs3\Hp  
import org.rut.util.algorithm.SortUtil; 'kg]|"M  
S}[:;p?F`  
/** (DMnwqr  
* @author treeroot %V1T !<  
* @since 2006-2-2 (:Hbtr I  
* @version 1.0 O9=H [b  
*/ p,u<g JUL  
public class ImprovedMergeSort implements SortUtil.Sort { KIBZQ.uG  
c)!s[oL  
private static final int THRESHOLD = 10; %3+hz $E  
a={qA4N  
/* B{UoNm@  
* (non-Javadoc) ecZOX$'5  
* Ww tQ>'R"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XhD fI &  
*/ *n_4Rr  
public void sort(int[] data) {  wY_-  
int[] temp=new int[data.length]; ZUJOBjb` K  
mergeSort(data,temp,0,data.length-1); c2mt<DtWW  
} Ru')X{]25  
y^46z( I  
private void mergeSort(int[] data, int[] temp, int l, int r) { 3R:i*8C  
int i, j, k; <.(/#=2  
int mid = (l + r) / 2; 9w<Bm"G  
if (l == r) 1HWJxV"  
return; j4SG A#;v  
if ((mid - l) >= THRESHOLD) UR2)e{RXg  
mergeSort(data, temp, l, mid); A^@<+?  
else L.:QI<n  
insertSort(data, l, mid - l + 1); LqsJHG  
if ((r - mid) > THRESHOLD) ^r :A^q  
mergeSort(data, temp, mid + 1, r); )9jQ_  
else / lM~K:  
insertSort(data, mid + 1, r - mid); (<JDD]J  
:Fd9N).%  
for (i = l; i <= mid; i++) { h}&IlDG  
temp = data; N_Ld,J%g  
} OwIy(ukTI  
for (j = 1; j <= r - mid; j++) { N~J Eia%  
temp[r - j + 1] = data[j + mid]; hsO.521g  
} d@f2Vxe7  
int a = temp[l]; Od]xIk+E  
int b = temp[r]; \` ^Tbn:  
for (i = l, j = r, k = l; k <= r; k++) { T|2%b*/  
if (a < b) { V@'S#K#  
data[k] = temp[i++]; "[S 6w  
a = temp; 5g>kr< K  
} else { >b?)WNk  
data[k] = temp[j--]; z ;Nk& <?  
b = temp[j]; R./6Q1  
} }F`2$ Q+CW  
} W*`6ero  
} pDq_nx9  
TPFmSDq  
/** f:&OOD o  
* @param data "]V|bz o0a  
* @param l * .VZ(wX  
* @param i 1+}Ud.v3VW  
*/ V>92/w.fe  
private void insertSort(int[] data, int start, int len) { mM{v>Em2K#  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~Fb?h%w  
} swL|Ff`$  
} k\%v;3nBK  
} <uwCP4E  
} O9)}:++T  
FN EmGz/4  
堆排序: %{abRBny  
'k Z1&_{  
package org.rut.util.algorithm.support; ah9',((!  
9G/2^PI  
import org.rut.util.algorithm.SortUtil; t3g! 5  
i4rF~'h@  
/** + qqN  
* @author treeroot #e>MNc 'z  
* @since 2006-2-2 dKpa5f7  
* @version 1.0 't.F.t  
*/ g^UWf<xp  
public class HeapSort implements SortUtil.Sort{ S]=Vr%irX  
NYvj?>[y  
/* (non-Javadoc) 82!GM.b  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ):ZumG#o  
*/ }l!_m.#e  
public void sort(int[] data) { 0N;d)3  
MaxHeap h=new MaxHeap(); i]?xM2(N  
h.init(data); 17MjIX  
for(int i=0;i h.remove(); Qo *]l_UO;  
System.arraycopy(h.queue,1,data,0,data.length); ACltV"dB^  
} }*R6p?L5  
C~V$G}mM  
private static class MaxHeap{ m kf{_!TK  
PzDgl6C  
void init(int[] data){ c (8J  
this.queue=new int[data.length+1]; J3+8s [oJ>  
for(int i=0;i queue[++size]=data; P< x  
fixUp(size); <U pjAuG8  
}  )6+W6:  
} AI;=k  
F &}V65  
private int size=0; t&]Mt 7  
8:fiO|~%  
private int[] queue; K.m[S[cy  
 U~t(YT  
public int get() { p n>`v   
return queue[1]; R,1,4XT  
} ^0-=(JrC  
pk1M.+  
public void remove() { hiHp@"l<  
SortUtil.swap(queue,1,size--); We?:DM [  
fixDown(1); 1tpD|  
} [Cp{i<C  
file://fixdown y8z%s/gRh  
private void fixDown(int k) { &}1)]6q$  
int j; ,$-PC=Ti(  
while ((j = k << 1) <= size) { L9oZ7o  
if (j < size %26amp;%26amp; queue[j] j++; G)7sXEe  
if (queue[k]>queue[j]) file://不用交换 q /?_djv  
break; musxX58%  
SortUtil.swap(queue,j,k); Zh^w)}(W  
k = j;  64fG,b  
} Kjw\SQ)2~  
} #KW:OFT  
private void fixUp(int k) {  ?~IZ{!  
while (k > 1) { PM7/fv*,  
int j = k >> 1; 9To6Rc;  
if (queue[j]>queue[k]) "QS7?=>*F  
break; ||aU>Wj4  
SortUtil.swap(queue,j,k); >,3 3Jx  
k = j; g"Bv!9*H  
} !d(V7`8  
} d*L'`BBsp  
1[^d8!U  
} dZmq  
y>8?RX8  
} nT"z(\i.!J  
>k|[U[@  
SortUtil: e_V(G  
p;Kr664  
package org.rut.util.algorithm; qE{S'XyM,  
]XU#i#;c  
import org.rut.util.algorithm.support.BubbleSort; ,-)1)R\.  
import org.rut.util.algorithm.support.HeapSort; /$(D>KU  
import org.rut.util.algorithm.support.ImprovedMergeSort; vNGvEJ`qn  
import org.rut.util.algorithm.support.ImprovedQuickSort; ( Iew%U  
import org.rut.util.algorithm.support.InsertSort; W:\VFP f2  
import org.rut.util.algorithm.support.MergeSort; Ji q[VeLe  
import org.rut.util.algorithm.support.QuickSort; <!^Z|E  
import org.rut.util.algorithm.support.SelectionSort; ^ZG1  
import org.rut.util.algorithm.support.ShellSort; NY x4& *le  
C.<4D1}P  
/** bAp`lmFI  
* @author treeroot \ua.%|  
* @since 2006-2-2 g\'sGt3O  
* @version 1.0 2|BE{91  
*/ -; }Wm[  
public class SortUtil { x{$NstGB  
public final static int INSERT = 1; if>] )g2lr  
public final static int BUBBLE = 2; RMK U5A7  
public final static int SELECTION = 3; uE(w$2Wi  
public final static int SHELL = 4; 1CbC|q  
public final static int QUICK = 5; whCv9)x  
public final static int IMPROVED_QUICK = 6; ^MUM04l  
public final static int MERGE = 7; :%{7Q$Xv<  
public final static int IMPROVED_MERGE = 8; Kl?1)u3^4  
public final static int HEAP = 9; {NR~>=~K-  
7~'@m(9e  
public static void sort(int[] data) { zdCt#=QV?R  
sort(data, IMPROVED_QUICK); Za w+  
} X!Q"p$D4(  
private static String[] name={ h 8s*FI  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t At+5H  
}; kWFR(J&R  
Lrq&k40y  
private static Sort[] impl=new Sort[]{ V EzIWNV  
new InsertSort(), o;fQ,r P%  
new BubbleSort(), GF&"nW9A  
new SelectionSort(), 5 *_#"  
new ShellSort(), /l L*U  
new QuickSort(), |UG)*t/  
new ImprovedQuickSort(), T[~X~dqwn"  
new MergeSort(), [z\*Zg  
new ImprovedMergeSort(), :[doYizk:  
new HeapSort() lV8Mr6m  
}; &3<]FK  
&!ZpBR(  
public static String toString(int algorithm){ b11C3TyQT  
return name[algorithm-1]; *RPI$0  
} 2 E^P=jU`  
i&Ea@b  
public static void sort(int[] data, int algorithm) { \T0`GpE  
impl[algorithm-1].sort(data); X`&E,;bIb  
} D$ \ EZ   
$3>|R lxYA  
public static interface Sort { ":OXs9Yg  
public void sort(int[] data); SPBXI[[-  
} =B 9U  
xQQ6D  
public static void swap(int[] data, int i, int j) { 0 !Yi.'+  
int temp = data; Xma0k3;-  
data = data[j]; U/>5C:  
data[j] = temp;  l}JVRU{  
} ~0L>l J  
} E%TvGe;#  
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