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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。 KJV8y"^=Q  
插入排序: 8^^ 1h  
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package org.rut.util.algorithm.support; 1I`F?MT  
24nNRTI  
import org.rut.util.algorithm.SortUtil; M 9-Q  
/** #Lpw8b6  
* @author treeroot  [Q{\Ik  
* @since 2006-2-2 ?)J/uU2w  
* @version 1.0 D{s87h  
*/ i%!<6K6UT  
public class InsertSort implements SortUtil.Sort{ pHoHngyi&  
r-wCAk}m*?  
/* (non-Javadoc) %'ah,2a%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4~3 n =T*  
*/ *~g*J^R}  
public void sort(int[] data) { 1&! i:F#  
int temp; "D8WdV(  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); r :$tvT*  
} \?]U*)B.r  
} )2RRa^=&  
} cz,QP'g  
]7Du/)$  
} Cyd/HTNh<  
]}PXN1(  
冒泡排序: pHmqwB~|  
XrM+DQ;  
package org.rut.util.algorithm.support; ij!d-eM/b  
4P[MkMoC  
import org.rut.util.algorithm.SortUtil; kBhjqI*  
Ij7P-5=<  
/** Fy"M 4;7  
* @author treeroot pDZewb&cA  
* @since 2006-2-2 m_*wqNFA6  
* @version 1.0 z`IW[N7Z  
*/ uDie205  
public class BubbleSort implements SortUtil.Sort{ /M%>M]  
tu<<pR>  
/* (non-Javadoc) BW7AjtxQ&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {iX#  
*/ ". tW5O>  
public void sort(int[] data) { F$)l8}  
int temp; 2PYnzAsl  
for(int i=0;i for(int j=data.length-1;j>i;j--){ &RYdSXM  
if(data[j] SortUtil.swap(data,j,j-1); V\Gs&>  
} @JXpD8jn  
} O\.^H/  
} UP^8Yhdo  
} !{r2`d09n)  
@Suz-j(H  
} zawu(3?~)5  
 Rpgg :  
选择排序: z^U+ oG  
+Q u.86dH  
package org.rut.util.algorithm.support; M i& ;1!bg  
LAlwQ^v|  
import org.rut.util.algorithm.SortUtil; >Xk42zvqn  
v']_)  
/** 6&os`!  
* @author treeroot {lWVH  
* @since 2006-2-2 xcr2|  
* @version 1.0 GMJ4v S  
*/ EjLq&QR.  
public class SelectionSort implements SortUtil.Sort { $KYGQP  
a~7D4G  
/* `s)4F~aVo  
* (non-Javadoc) &Gjpc>d  
* ?{qUn8f2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `Y:]&w  
*/ PP$sdmo  
public void sort(int[] data) { w\acgQ^%e  
int temp; a2B71RT~  
for (int i = 0; i < data.length; i++) { 4W" A*A  
int lowIndex = i; \1!Q.V  
for (int j = data.length - 1; j > i; j--) { ,gVVYH?qR  
if (data[j] < data[lowIndex]) { E`oA(x7l  
lowIndex = j; -`I|=lBz{H  
} Cw+boB_tip  
} RG{T\9]n  
SortUtil.swap(data,i,lowIndex); 9s^$tgH  
} K khuPBd2  
} rNq* z,  
?Z 2,?G  
} iSCkV2  
ZU`9]7"87B  
Shell排序: Ax&!Nz+?  
gS~H1Ro  
package org.rut.util.algorithm.support; _=~u\$  
p[C"K0>:_F  
import org.rut.util.algorithm.SortUtil; P:'wSE91  
D!~ Y"4<  
/** Qp:I[:Lr;  
* @author treeroot xn3 _ ED  
* @since 2006-2-2 Jj\4P1|'7  
* @version 1.0 9(^UchZZi  
*/ H7X-\K 1w  
public class ShellSort implements SortUtil.Sort{ $\BYN=#  
Rlewp8?LB  
/* (non-Javadoc) !:|*!  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {KWVPeh  
*/ G1z*e.+y  
public void sort(int[] data) { 2'?'dfj  
for(int i=data.length/2;i>2;i/=2){ 23):OB>S`  
for(int j=0;j insertSort(data,j,i); !G3AD3  
} ,GH`tK_  
} n{;Q"\*Sg  
insertSort(data,0,1); 0#8   
} ;\*3A22 #  
J,?#O#j  
/** 77@N79lqO  
* @param data !"F;wg$  
* @param j ELCNf   
* @param i 3%+ ~"4&  
*/ *DPX4 P  
private void insertSort(int[] data, int start, int inc) { <IZt]P  
int temp; a&_ h(  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); vN{@c(=g  
} n)kbQ]  
} rM7qBt  
} Bz ;r<Kn  
n4k q=Z%  
} m;dwt1'Zw  
_= v4Iz0  
快速排序: R])Eg&  
AT"gRCU$4  
package org.rut.util.algorithm.support; a!$kKOK  
>B{NxL3->  
import org.rut.util.algorithm.SortUtil; ~*Y#Y{  
Ks%0!X?3q  
/** `*8}q!.  
* @author treeroot t neTOj  
* @since 2006-2-2 )aIcA  
* @version 1.0 OBAO(Ke  
*/ %l7[eZ{Y  
public class QuickSort implements SortUtil.Sort{ QXkA%'@'  
z;qDl%AF  
/* (non-Javadoc) StI N+S@Z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sC-o'13  
*/ ^ #:;6^Su  
public void sort(int[] data) { 6j6CA?|  
quickSort(data,0,data.length-1); }:#WjH^  
} 8TP$?8l  
private void quickSort(int[] data,int i,int j){ )=~&l={T  
int pivotIndex=(i+j)/2; NpH8=H9  
file://swap 0zr27ko  
SortUtil.swap(data,pivotIndex,j); A"JdG%t>.h  
fa/S!%}fO  
int k=partition(data,i-1,j,data[j]);  \(\a=  
SortUtil.swap(data,k,j); EwPrh  
if((k-i)>1) quickSort(data,i,k-1); &ys>z<Z  
if((j-k)>1) quickSort(data,k+1,j); Q>{$Aqc,e  
c|?(>  
} .t@|2  
/** t$!zgUJ  
* @param data nONuw;K  
* @param i cLZ D\1Mt  
* @param j P=n_wE  
* @return 4zMvHe  
*/ ;\RV C 7  
private int partition(int[] data, int l, int r,int pivot) { c[Fc3  
do{ i6if\B  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); G)7U &B  
SortUtil.swap(data,l,r); 60+zoL'  
} +_]Ui| l  
while(l SortUtil.swap(data,l,r); 7%^G ]AFi  
return l; JH.XZM&  
} Ugri _  
k)b{ UFRW  
} 7h 54j  
W[&nQW$E  
改进后的快速排序: <&E}db  
] U>MYdGWb  
package org.rut.util.algorithm.support; Ypyi(_G(?>  
hZ45i?%  
import org.rut.util.algorithm.SortUtil; |A3"Jc.2o  
egq,)6>  
/** w 0BphK[  
* @author treeroot %> XsKXj  
* @since 2006-2-2 !K-1tp$  
* @version 1.0 $nE{%?n-#  
*/ <j'K7We/tP  
public class ImprovedQuickSort implements SortUtil.Sort { rbd0`J9fq  
Orq/38:4G  
private static int MAX_STACK_SIZE=4096; u n v:sV#b  
private static int THRESHOLD=10; JQM_96\  
/* (non-Javadoc) _BewaI;w  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TUp\,T^2  
*/ #<0Hvde  
public void sort(int[] data) { <X8Urum  
int[] stack=new int[MAX_STACK_SIZE]; E22o-nI?1  
 :xsZz$  
int top=-1; ^OY$ W  
int pivot; }WsPuo  
int pivotIndex,l,r; M}|(:o3Yo  
07.p {X R  
stack[++top]=0; 8&@=Anc&q  
stack[++top]=data.length-1; m^ xTV-#l@  
e)e(f"t6Q  
while(top>0){ wC{sP"D  
int j=stack[top--]; TZgtu+&  
int i=stack[top--]; M1Q&)am  
|P5dv>tb F  
pivotIndex=(i+j)/2; 45JL{YRN  
pivot=data[pivotIndex]; *Dg@fxCQ  
+ f6LG 0q  
SortUtil.swap(data,pivotIndex,j); s-CAo~,  
pz^S3fy  
file://partition :qo[@x{  
l=i-1; \n_7+[=E  
r=j; ='"Yj  
do{ q2%cLbI F  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); {-5)nS^_  
SortUtil.swap(data,l,r); $1])>m_ct  
} ,buX|  
while(l SortUtil.swap(data,l,r); uc,>VzdB  
SortUtil.swap(data,l,j); ;u2[Ww~k  
Mq91HmC(@  
if((l-i)>THRESHOLD){ &E`Nu (e  
stack[++top]=i; b~^'P   
stack[++top]=l-1; !td!">r46e  
} :I#.d7`uk  
if((j-l)>THRESHOLD){ 08ZvRy(Je<  
stack[++top]=l+1; V[.{cY ?6  
stack[++top]=j; SWdmej[  
} t=7Gfv  
UuIjtqW  
}  9tpyrGv  
file://new InsertSort().sort(data); ika*w  
insertSort(data); hrniZ^  
} !{l% 3'2  
/** j([b)k=  
* @param data g=td*S  
*/ Z.${WZW  
private void insertSort(int[] data) { D*.3]3-I  
int temp; s4Ja y!A  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); X0j\nXk  
} 6Jgl"Jw8  
} e,s  S.  
} o*$KiD  
bm;iX*~  
} >.SO2w  
2]fTDKh  
归并排序: N~|f^#L  
oN}\bK  
package org.rut.util.algorithm.support; M Q =x:p{  
jO"/5 x26  
import org.rut.util.algorithm.SortUtil; i<S \x  
u4lM>(3Y}  
/** iB0r+IbR  
* @author treeroot UusAsezm:  
* @since 2006-2-2 ky !Z JR  
* @version 1.0 zDYJe_m ~  
*/ %#% YU|4R  
public class MergeSort implements SortUtil.Sort{ yMW3mx301j  
!o| ex+z;  
/* (non-Javadoc) J|xXo  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1N),k5I  
*/ bHTf{=  
public void sort(int[] data) { M]V j  
int[] temp=new int[data.length]; jGLmgJG-P  
mergeSort(data,temp,0,data.length-1); !T`g\za/  
} uEPm[oyX  
n}NUe`E_h  
private void mergeSort(int[] data,int[] temp,int l,int r){ KUW )F  
int mid=(l+r)/2; nkq{_;xp  
if(l==r) return ; qw4wg9w5p  
mergeSort(data,temp,l,mid); L^^f.w#m  
mergeSort(data,temp,mid+1,r); r(]Gd`]  
for(int i=l;i<=r;i++){ bIt{kzuQC  
temp=data; Q]/g=Nn ^~  
} "% \ y$  
int i1=l; bjUe+ #BL  
int i2=mid+1; AJ 0Bb7  
for(int cur=l;cur<=r;cur++){ 7OZ0;fK  
if(i1==mid+1) D{]w +  
data[cur]=temp[i2++]; Pd:tRY+t/  
else if(i2>r)  OG IN-  
data[cur]=temp[i1++]; .O5|d+S  
else if(temp[i1] data[cur]=temp[i1++];  0Ns Po  
else n\JSt}A  
data[cur]=temp[i2++]; a6T!)g  
} ;XY#Jl>tg  
} I<lkociUCG  
#r&yH^-  
} =aT8=ihP  
"gpfD-BX  
改进后的归并排序: N*w{NB7L  
A}!D&s&UH  
package org.rut.util.algorithm.support; i/N68  
GB >h8yXH  
import org.rut.util.algorithm.SortUtil; +],2smd@N  
~}YgZ/U7T  
/** "(F:'J} X  
* @author treeroot qB3& F pgW  
* @since 2006-2-2 Y$q--JA  
* @version 1.0 K<ldl.  
*/ 0J)VEMC  
public class ImprovedMergeSort implements SortUtil.Sort { P`hg*"<V  
$I@. <J*  
private static final int THRESHOLD = 10; x@@k_'~t%  
e]jzFm~  
/* h" YA>_1  
* (non-Javadoc) b#e|#!Je  
* @(st![i+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q!Dr3x  
*/ vP<8 ,XG  
public void sort(int[] data) { !ImtnU}  
int[] temp=new int[data.length]; fwyz|>H_Y(  
mergeSort(data,temp,0,data.length-1); 5#? HL  
} YsjTC$Tx,  
]\R%@FCYc  
private void mergeSort(int[] data, int[] temp, int l, int r) { bDcWPwe  
int i, j, k; Y6%O9b  
int mid = (l + r) / 2; ;@u+b0 j  
if (l == r) g60r m1b  
return; {,m W7  
if ((mid - l) >= THRESHOLD) _EZrZB  
mergeSort(data, temp, l, mid); ~_L_un.R  
else Q_R&+@ju  
insertSort(data, l, mid - l + 1); 0jwex  
if ((r - mid) > THRESHOLD) b _0Xi  
mergeSort(data, temp, mid + 1, r); 93N:?B9  
else ~4tu*\P  
insertSort(data, mid + 1, r - mid); RIl+QA  
=:=uV0jX\  
for (i = l; i <= mid; i++) { AUAJMS!m  
temp = data; AA,n.;zy<  
} NvfQa6?;  
for (j = 1; j <= r - mid; j++) { "Tm`V9  
temp[r - j + 1] = data[j + mid]; UYb:q  
} MY}B)`yx=  
int a = temp[l]; _gF )aE  
int b = temp[r]; f?A*g$v  
for (i = l, j = r, k = l; k <= r; k++) { Ik4U+'z6  
if (a < b) { ;HeUD5Nt6F  
data[k] = temp[i++]; 3"hPplE  
a = temp; s k_Q\0a  
} else { EWg\\90  
data[k] = temp[j--]; wGf SVA-q\  
b = temp[j]; _6 |lw&o07  
} }A%Sx!7~  
} +H~})PeQ  
} l;SqjkN  
anTS8b   
/** C2</.jeLa  
* @param data ?8Hr 9  
* @param l !8U\GR `  
* @param i .pOTIRbA  
*/ ^i^/d#  
private void insertSort(int[] data, int start, int len) { 0Y9\,y_  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W`^Zb[  
} LMrb 1lg$  
} i 7 f/r.  
} V4 PD]5ZW  
} $>;U^-#3  
_$?SKid|o  
堆排序: /gKX%`ZF/r  
$!x8XpR8s  
package org.rut.util.algorithm.support; !$x9s'D  
COa"zg  
import org.rut.util.algorithm.SortUtil; .ns1;8  
Nj_h+=UE!  
/** ~g+?]Lk}  
* @author treeroot nTweQ  
* @since 2006-2-2 LuB-9[^<  
* @version 1.0 <$LVAy"RD  
*/ !K#Q[Ee  
public class HeapSort implements SortUtil.Sort{ <3iL5}  
8-c1q*q)  
/* (non-Javadoc) Bg*Oj)NM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }^;Tt-*k  
*/ 3EN?{T<yf  
public void sort(int[] data) { ^|?/ y=  
MaxHeap h=new MaxHeap(); Q&;dXE h  
h.init(data); POQRq%w  
for(int i=0;i h.remove(); V_?5cwZ  
System.arraycopy(h.queue,1,data,0,data.length); :;S]jNy}j)  
} $UAmUQg)}_  
CxC&+';  
private static class MaxHeap{ |"vUC/R2&  
N246RV1W  
void init(int[] data){ -gl7mO*  
this.queue=new int[data.length+1]; -aPvls   
for(int i=0;i queue[++size]=data; `g&<7~\=A  
fixUp(size); Tp&03  
} C#`VVtei  
} Lf|5miO  
Q"KD O-t  
private int size=0; F7wpGtt  
L<encPJt  
private int[] queue; /ov&h;  
0!YB.=\{_q  
public int get() { _4VF>#b  
return queue[1]; j()<.h;'  
} +(*S@V$c  
;#G)([  
public void remove() { A>8uLO G}  
SortUtil.swap(queue,1,size--); .olDmFQD  
fixDown(1); TOp|Qtn  
} GtRc7,  
file://fixdown r7r>1W%4  
private void fixDown(int k) { IP K.  
int j; ^~k2(DLk  
while ((j = k << 1) <= size) { @bQf =N+  
if (j < size %26amp;%26amp; queue[j] j++; 1-4iy_d  
if (queue[k]>queue[j]) file://不用交换 ,rT62w*e  
break; M/XxiF  
SortUtil.swap(queue,j,k); i>w'$ {  
k = j; >L F y:a  
} !N--  
} &)@|WLW  
private void fixUp(int k) { B>}=x4-8  
while (k > 1) { :gMcl"t--  
int j = k >> 1; Mvq5s+.  
if (queue[j]>queue[k]) g z-X4A"  
break; V )CS,w  
SortUtil.swap(queue,j,k); %y{#fZHc  
k = j; =Jd ('r  
} 3A'vq2beM  
} FMCX->}$  
G j[`r  
} vs-%J 6}G  
=l?F_  
} N6Mo|  
:uE:mY%R  
SortUtil: #'N"<o[  
RHc63b\  
package org.rut.util.algorithm; w,fA-*bZ 0  
5|>FM&  
import org.rut.util.algorithm.support.BubbleSort; pJ Iq`)p5  
import org.rut.util.algorithm.support.HeapSort; M8 oCh  
import org.rut.util.algorithm.support.ImprovedMergeSort; e"9 u}-Q@  
import org.rut.util.algorithm.support.ImprovedQuickSort; jEwfa_Q%  
import org.rut.util.algorithm.support.InsertSort; zi7,?bD  
import org.rut.util.algorithm.support.MergeSort; Ergh]"AD6-  
import org.rut.util.algorithm.support.QuickSort; [EUp4%Z #  
import org.rut.util.algorithm.support.SelectionSort; BFP (2j  
import org.rut.util.algorithm.support.ShellSort; f$vWi&(  
9~8 A>  
/** f>\guuG  
* @author treeroot :=qblc  
* @since 2006-2-2 R#OVJ(#  
* @version 1.0 gPs%v`y)*D  
*/ v o vc,4}  
public class SortUtil { 7'g'qUW+~  
public final static int INSERT = 1; by z2u  
public final static int BUBBLE = 2; S&]AIG)  
public final static int SELECTION = 3; Wy{xTLXk2  
public final static int SHELL = 4; *"4d6  
public final static int QUICK = 5; dLb9p"EE#  
public final static int IMPROVED_QUICK = 6; V7}5Zw1  
public final static int MERGE = 7; n]$50_@  
public final static int IMPROVED_MERGE = 8; Ve,h]/G  
public final static int HEAP = 9; +L(0R&C  
<T?H H$es)  
public static void sort(int[] data) { P%`|Tu!B  
sort(data, IMPROVED_QUICK); fx &b*O C  
} $^|I?5xD  
private static String[] name={ HAa2q=  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" oxkA+}^j8M  
}; EugQr<sM#  
X=O}k&  
private static Sort[] impl=new Sort[]{ /5 rWcX  
new InsertSort(), tmM8YN|  
new BubbleSort(), 6E~T$^Q}  
new SelectionSort(), v0EF?$Wo  
new ShellSort(), >05_#{up  
new QuickSort(), ^B[%|{cO  
new ImprovedQuickSort(), $FV!HD  
new MergeSort(), QJ{to%  
new ImprovedMergeSort(), m/W0vPM 1  
new HeapSort() 3QlV,)}  
}; 6*3J3Lc_<  
^+Ho#]  
public static String toString(int algorithm){ So &c\Ff  
return name[algorithm-1]; T8|aFoHCK  
} 6- H81y 3  
'_)NI  
public static void sort(int[] data, int algorithm) { V_Owi5h  
impl[algorithm-1].sort(data); S}zh0`+d'Z  
} =/xTUI4  
{oIv%U9  
public static interface Sort { a&yIH;-  
public void sort(int[] data); fJ"#c<n  
} -oGJPl{r  
2w>l nJ-  
public static void swap(int[] data, int i, int j) { *Jd,8B/hC  
int temp = data; rG7S^,5o  
data = data[j]; xsjJ8>G  
data[j] = temp; .O9 A[s<  
} > "G H Li  
} Wl3jbupu _  
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