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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。 U*-%V$3+w5  
插入排序: A) qOJ(OEz  
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package org.rut.util.algorithm.support; KmMt:^9  
YXmLd'F^3  
import org.rut.util.algorithm.SortUtil; }>grGr%oR  
/** 5vS'Qhc  
* @author treeroot zP5HTEz  
* @since 2006-2-2 tvd/Y|bV=  
* @version 1.0 blLX ncyD  
*/ ztu N0}'  
public class InsertSort implements SortUtil.Sort{ [\I\).  
P| G:h&  
/* (non-Javadoc) n |(Y?`(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7Q^t(  
*/ vZ*5 93C8  
public void sort(int[] data) { -q-%)f  
int temp; k(T/yd rw  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); _mcD*V  
} 9;:Lf  
} xEbcF+@  
} wt-)5f'{  
0n5N-b?G-@  
} `AYHCn  
HIF.;ImG^  
冒泡排序: {~Phc 2z  
%R}}1  
package org.rut.util.algorithm.support; Rrsz{a  
UA{A G;  
import org.rut.util.algorithm.SortUtil; &Uzg&eB  
A H`6)v<f  
/** uYV# '%  
* @author treeroot ).k=[@@V  
* @since 2006-2-2 p`Ax)L\f  
* @version 1.0 `2GHB@S"k  
*/ 2 &R-z G  
public class BubbleSort implements SortUtil.Sort{ ;hRo} +\l  
<x,$ODso  
/* (non-Javadoc) L> cTI2NB.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x H\5T!  
*/ !)ee{CwNc  
public void sort(int[] data) { d6wsT\S  
int temp; $LKniK  
for(int i=0;i for(int j=data.length-1;j>i;j--){ i/~A7\:8%  
if(data[j] SortUtil.swap(data,j,j-1); x#'# ~EO-G  
}  /I="+  
} M,NYF`;a  
} ZE4~rq/W  
} mlX^5h'  
Fz-Bd*uS  
} o ;.j_  
-$t#AYKz  
选择排序: NCBS=L:  
`ez_ {  
package org.rut.util.algorithm.support; kAU[lPt*R  
U^[<G6<9]  
import org.rut.util.algorithm.SortUtil; 7?e*b(vd  
q0$}MB6  
/** Xn4U!<RT"  
* @author treeroot }VdohX-  
* @since 2006-2-2 jeC3}BL }  
* @version 1.0 DjtUX>e  
*/ 1Qv5m^>vj  
public class SelectionSort implements SortUtil.Sort { ]r{y+g|  
Q R;Xj3]v  
/*   "Qm  
* (non-Javadoc) lkOugjI  
* `9%@{Ryo  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v-EcJj%  
*/ 1%t9ic  
public void sort(int[] data) { d XrLeoK  
int temp; "\Z.YZUa\  
for (int i = 0; i < data.length; i++) { +wr2TT~  
int lowIndex = i; ;i>|5tEy  
for (int j = data.length - 1; j > i; j--) { *JUP~/Nr  
if (data[j] < data[lowIndex]) { Ac|IBXGa=  
lowIndex = j; &")ON[|b  
} 2{% U\^-  
} dk# LAm0<  
SortUtil.swap(data,i,lowIndex); NO8)XJ3s  
} _5y3<H<?  
} z\{y[3-  
*#w+*ywVZH  
} C8%q?.nH=  
0DV .1  
Shell排序: ^,qi` Tk  
N\BB8<F  
package org.rut.util.algorithm.support; ?V3e;n  
QJjqtOf>  
import org.rut.util.algorithm.SortUtil; *xI0hFJIM  
a"4j9cO  
/** p<: bP w  
* @author treeroot y}Oc^Fc  
* @since 2006-2-2 sFuB[ JJ}  
* @version 1.0 &;DK^ta*P  
*/ CI{? Kb  
public class ShellSort implements SortUtil.Sort{ 1/:WA:]1 ,  
[< Bk% B5  
/* (non-Javadoc) gi#bU  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +`>Tuz~  
*/ \]1qAFB5  
public void sort(int[] data) { T%B&HsH  
for(int i=data.length/2;i>2;i/=2){ #`?B:  
for(int j=0;j insertSort(data,j,i); 7VduewKX8  
} DD{-xCCR  
} #?DwOUw  
insertSort(data,0,1); bz<f u  
} <F{EZ Ii  
@ (<C{  
/** Q}C)az  
* @param data :c)N"EJlI2  
* @param j [T<nTB# w  
* @param i 7&;M"?m&  
*/  Wa7-N4  
private void insertSort(int[] data, int start, int inc) { DybuLB$f  
int temp; +}[M&D  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); sxkWg>  
} ? Dm={S6  
} 4+I@   
} p8,Rr{  
w+($= n~  
} 0N>NX?r  
0h=NbLr|S-  
快速排序: 0}H7Xdkp  
c&me=WD  
package org.rut.util.algorithm.support; z-ns@y(f@X  
&m[ZpJ9  
import org.rut.util.algorithm.SortUtil; ^,O%E;g^#  
+?y ', Ir  
/** = Lt)15  
* @author treeroot RC?gozBFJ  
* @since 2006-2-2 >%LZ|*U  
* @version 1.0 AQ+MjS,  
*/ ynY(  
public class QuickSort implements SortUtil.Sort{ Vi1l^ Za  
?i'N 9 /(  
/* (non-Javadoc) $r+ _Y/  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4:wVT;?a  
*/ v_^>*Vm*  
public void sort(int[] data) { U1nObA  
quickSort(data,0,data.length-1); C)Ep}eHjf_  
} %x{jmZ$}  
private void quickSort(int[] data,int i,int j){ o_ng{SL  
int pivotIndex=(i+j)/2; 6)=`&>9  
file://swap XNbeYj  
SortUtil.swap(data,pivotIndex,j); ,^wjtA 3j8  
Jj%"  
int k=partition(data,i-1,j,data[j]); m-?hHd O  
SortUtil.swap(data,k,j); SzXR],dA  
if((k-i)>1) quickSort(data,i,k-1); AwnQ5-IR\  
if((j-k)>1) quickSort(data,k+1,j); `st3iTLZY  
%[S-"k  
} t?1 b(oJ  
/** u-</G-y  
* @param data wH]5VltUT1  
* @param i ,i RUR 8  
* @param j a=_+8RyVQ  
* @return %Yw?!GvL[  
*/ U/ds(*g@  
private int partition(int[] data, int l, int r,int pivot) { gug9cmA/Q7  
do{ >E lK8  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); N W]zMU{c  
SortUtil.swap(data,l,r); 'k'"+  
} t?Ku6Z'  
while(l SortUtil.swap(data,l,r); Dxvizd>VU  
return l; /tdRUX  
} (}B3df  
E)>.2{]C>  
} okm }%#|  
O}s Mqh  
改进后的快速排序: ^O6eFD U  
Hnft1   
package org.rut.util.algorithm.support; )B*D\9\Z  
>;Ag7Ex  
import org.rut.util.algorithm.SortUtil; \^oI3K0`  
<#nt?Xn  
/** s,CN<`/>x  
* @author treeroot x`:c0y9uG  
* @since 2006-2-2 PQj'D <G  
* @version 1.0 XgI;2Be+&a  
*/ 0ZM#..3sI  
public class ImprovedQuickSort implements SortUtil.Sort { !P8Y(i  
[_HY6gr  
private static int MAX_STACK_SIZE=4096; ]A=yj@o$xN  
private static int THRESHOLD=10; 8/vGA=  
/* (non-Javadoc) *Z8qd{.$q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uee(1  
*/ s3-TBhAv  
public void sort(int[] data) { tp<v  
int[] stack=new int[MAX_STACK_SIZE]; K>2M*bGc p  
-bd'sv  
int top=-1; 3d`u!i?/  
int pivot; 1SF8D`3  
int pivotIndex,l,r; 0fJz[;dV>n  
&K*Kr=9N  
stack[++top]=0; \/s0p  
stack[++top]=data.length-1; NR3h|'eC  
g@zhhBtQ  
while(top>0){ 9ls*L!Jw  
int j=stack[top--]; D wfw|h  
int i=stack[top--]; v#|yr<  
?WP*At0  
pivotIndex=(i+j)/2; ^ 0.`1$  
pivot=data[pivotIndex]; xs6kr  
eC3 ~|G_O  
SortUtil.swap(data,pivotIndex,j); 'iWDYZ?  
8kLHQ0pmu  
file://partition QXu[<V  
l=i-1; !$NQF/Ol  
r=j; WJJmM*>JW  
do{ 0Ke2%+yqJ  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ~KQiNkA\|l  
SortUtil.swap(data,l,r); S3UJ)@ E  
} u!-v1O^[  
while(l SortUtil.swap(data,l,r); 4L bll%[9  
SortUtil.swap(data,l,j); XL7||9,(h  
'=0l{hv@  
if((l-i)>THRESHOLD){ TKp2C5bX  
stack[++top]=i; '':MhRb  
stack[++top]=l-1; x7xMSy  
} .uinv  
if((j-l)>THRESHOLD){ JU#m?4g  
stack[++top]=l+1; 'gtcy  
stack[++top]=j; _WR/]1R  
} "m%EFWUOl  
UHgW-N"  
} Pcjrv:0$  
file://new InsertSort().sort(data); 7,s5Gd-  
insertSort(data); LAFxeo  
} -^Qm_lN  
/** "$/1.SX;]  
* @param data V x{   
*/ O\SH;y,N  
private void insertSort(int[] data) { sXmP<c  
int temp; xO^lE@a o  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); LJ6L#es2  
} U.WXh(`%  
} AJ3%Z$JJ;s  
} U[?f@.&  
d}y")q|F  
} E{P94Phv  
OdpHF~(Y/  
归并排序: ^T*!~K8A  
aL*}@|JL"  
package org.rut.util.algorithm.support; OIK46D6?.  
R.?PD$;_M  
import org.rut.util.algorithm.SortUtil; ~Ajst!Y7=  
3Vbt(K  
/** h=qT@)h1>  
* @author treeroot u* G+=aV.6  
* @since 2006-2-2 g^}C/~b[  
* @version 1.0 W] WH4.y  
*/ gA`QV''/:  
public class MergeSort implements SortUtil.Sort{ JZK93R  
7GTDe'T  
/* (non-Javadoc) .C.b5x!  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W~PMR/^i  
*/ Yw yMC d  
public void sort(int[] data) { rog1  
int[] temp=new int[data.length]; l3*GQ~m7  
mergeSort(data,temp,0,data.length-1); l<p<\,nV$  
} ##%&*vh  
cF_`QRtO  
private void mergeSort(int[] data,int[] temp,int l,int r){ Dlpmm2  
int mid=(l+r)/2; G3 |x%/Fbp  
if(l==r) return ; ,!,tU7-H  
mergeSort(data,temp,l,mid); `kE7PXqa  
mergeSort(data,temp,mid+1,r); w+r).PS}C  
for(int i=l;i<=r;i++){ KnKf8c  
temp=data; bT6VxbNS  
} u0]u"T&N!  
int i1=l; 3IJ0 P.x!o  
int i2=mid+1; @lq)L  
for(int cur=l;cur<=r;cur++){ A;^ iy]"  
if(i1==mid+1) cU-A1W  
data[cur]=temp[i2++]; NMQG[py!f  
else if(i2>r) r \[|'hA  
data[cur]=temp[i1++]; I:HrBhI)wP  
else if(temp[i1] data[cur]=temp[i1++]; 4AKr.a0q  
else =j{tFxJ  
data[cur]=temp[i2++]; 4l{$dtKbI  
} )&O6d .  
} Mna yiJl  
c%WO#}r|  
} MN8>I=p  
icX4n  
改进后的归并排序: & Zn`2%  
SQhVdYU1'  
package org.rut.util.algorithm.support; *u:,@io7'G  
}#-@5["-X  
import org.rut.util.algorithm.SortUtil; S>>wf:\ c  
wdAKU+tM  
/** }O>4XFj  
* @author treeroot 4lWqQVx  
* @since 2006-2-2 VdGVEDwz  
* @version 1.0 K a& 2>F  
*/ PO8Z2"WI  
public class ImprovedMergeSort implements SortUtil.Sort { #0vda'q=j  
; o Y|~  
private static final int THRESHOLD = 10; |d&C<O;f  
 ,vO\n^  
/* 7#d:TXS  
* (non-Javadoc) wJ pb$;  
* @HiGc^ X(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wV iTMlq  
*/ M.6uWwzQR  
public void sort(int[] data) { -KV,l  
int[] temp=new int[data.length]; @0s' (  
mergeSort(data,temp,0,data.length-1); _"Z?O)d*  
} NuSdN> 8ll  
LT Pr8^  
private void mergeSort(int[] data, int[] temp, int l, int r) { Ws7fWK;  
int i, j, k; m[^ )Q9o}  
int mid = (l + r) / 2; .d}yQ#5z  
if (l == r) 4sntSlz)~k  
return; b_a k@LYiu  
if ((mid - l) >= THRESHOLD) 6r`N\ :18  
mergeSort(data, temp, l, mid); RRPPojKZ  
else B`<}YVA  
insertSort(data, l, mid - l + 1); 3cgq'ob  
if ((r - mid) > THRESHOLD) uS,?oS  
mergeSort(data, temp, mid + 1, r); )c&ya|h  
else 6)ibXbH  
insertSort(data, mid + 1, r - mid); 6u#eLs  
1U#W=Fg'  
for (i = l; i <= mid; i++) { _B#x{ii  
temp = data; `kxC# &HO  
} l?2  
for (j = 1; j <= r - mid; j++) { i+qg*o$  
temp[r - j + 1] = data[j + mid]; ;4ybkOD  
} bL`\l!qQx;  
int a = temp[l]; Exqz$'(W9  
int b = temp[r]; 7%EIn9P  
for (i = l, j = r, k = l; k <= r; k++) { ZzNHEV  
if (a < b) { M9A1 8d|  
data[k] = temp[i++]; zn 0y`9!n?  
a = temp; ]7cciob  
} else { .%{B=_7  
data[k] = temp[j--]; Y,v9o  
b = temp[j]; B)[RIs  
} vD9\i*\2  
} =oIt.`rf  
} :d9GkC  
; M0`8MD  
/** JZ`SV}\`  
* @param data f.uuXK  
* @param l wkGr}  
* @param i Iy49o!  
*/ %6 Av1cv  
private void insertSort(int[] data, int start, int len) { s|H7;.3gp  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Pe,ky>ow  
} TK18U*z7J  
} kJJiDDL0;*  
} L=qhb;  
} -k7b# +T  
i_Q1\_m!  
堆排序: s7sd(f]=  
&hkD"GGe  
package org.rut.util.algorithm.support; .tLRY  
v~Dobk/n  
import org.rut.util.algorithm.SortUtil; F?R6zvive  
8)eRm{  
/** U ->vk{v  
* @author treeroot APF`b  
* @since 2006-2-2 8v2Wi.4T  
* @version 1.0 d;p3cW"  
*/ H @k }  
public class HeapSort implements SortUtil.Sort{ ]:D&kTc  
.<>t2,Af  
/* (non-Javadoc) ;"Qq/ knVL  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~y"R{-%uS  
*/ ?]Hs~n-  
public void sort(int[] data) { (^FMm1@T  
MaxHeap h=new MaxHeap(); 9) ]`le  
h.init(data); kVM*[<k  
for(int i=0;i h.remove(); ~&p]kmwXSX  
System.arraycopy(h.queue,1,data,0,data.length); q6$6:L,<  
} d+v| &yN  
TM{m:I:Z*n  
private static class MaxHeap{ JS8pN5   
5]]QW3  
void init(int[] data){ 4y+hr   
this.queue=new int[data.length+1]; SaF0JPm4z  
for(int i=0;i queue[++size]=data; _ps4-<ugC  
fixUp(size); Zy3F%]V0  
} `Zo5!"'  
} jrN 5l1np  
*(q{k%/M  
private int size=0; 5OGwOZAj52  
hs;|,r  
private int[] queue; d7b`X<=@s  
NiVLx_<Pr'  
public int get() { X%-hTl  
return queue[1]; CPNV\qCY  
} \R@}X cqZ  
p+b9D  
public void remove() { ,Aq, f$5V  
SortUtil.swap(queue,1,size--); C$])q`9  
fixDown(1); 7mi*#X}  
} T<7}IH$6xE  
file://fixdown Pfvb?Hy  
private void fixDown(int k) { uv$5MwKU  
int j; $aTo9{M^  
while ((j = k << 1) <= size) { {)r[?%FMgV  
if (j < size %26amp;%26amp; queue[j] j++; KS~Q[-F1P  
if (queue[k]>queue[j]) file://不用交换 &f'Lll  
break; hOLlZP+  
SortUtil.swap(queue,j,k); l>`S<rGe  
k = j; 8b,Z)"(U3  
} >^9j>< Z  
} iWW!'u$+I`  
private void fixUp(int k) { u SZfim@Z7  
while (k > 1) { i`CNgScF>  
int j = k >> 1; N|>MqH,Bt  
if (queue[j]>queue[k]) <LBCu;  
break; 5ip ZdQ^  
SortUtil.swap(queue,j,k); Bt:M^b^   
k = j; rM~Mqpk  
} UVi9}zr  
} X%*BiI  
fvTp9T\f3  
} ~rOvVi&4  
]nIVP   
} T`v  
hZ<FCY,/?  
SortUtil: %:l\Vhhz  
r H9}VA:h  
package org.rut.util.algorithm; K~UT@,CS60  
?j!/ Hc/b4  
import org.rut.util.algorithm.support.BubbleSort; !JDyv\i}  
import org.rut.util.algorithm.support.HeapSort; I %1P:-  
import org.rut.util.algorithm.support.ImprovedMergeSort; 96F+I!qC  
import org.rut.util.algorithm.support.ImprovedQuickSort; ^JIs:\ g<<  
import org.rut.util.algorithm.support.InsertSort; QB* AQ5-  
import org.rut.util.algorithm.support.MergeSort; dXt@x8E  
import org.rut.util.algorithm.support.QuickSort; z9AX8k(B6  
import org.rut.util.algorithm.support.SelectionSort; E0r#xmk  
import org.rut.util.algorithm.support.ShellSort; :]\-GJV5  
ezJ^ r,D|  
/** #c<F,` gdi  
* @author treeroot 9WoTo ,q  
* @since 2006-2-2 J{uqbrJICr  
* @version 1.0 "el3mloR 8  
*/ %kBrxf  
public class SortUtil {  +@Kq  
public final static int INSERT = 1; 0#ePg6n  
public final static int BUBBLE = 2; Tt0]G_  
public final static int SELECTION = 3; r)qow.+&  
public final static int SHELL = 4; = p2AK\  
public final static int QUICK = 5; 'OYnLz`"6  
public final static int IMPROVED_QUICK = 6; y3'K+?4  
public final static int MERGE = 7; A:sP%c;  
public final static int IMPROVED_MERGE = 8; v'y<}U  
public final static int HEAP = 9; H0lAu]~R_W  
7&|&y SCu  
public static void sort(int[] data) { d5LL( "  
sort(data, IMPROVED_QUICK); [DSzhi]  
} J72kjj&C  
private static String[] name={ 8+_e=_3R  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ` NvJ  
}; %8% 0l*n'  
_32 o7}!x  
private static Sort[] impl=new Sort[]{ !| GD8i  
new InsertSort(), =WFG[~8  
new BubbleSort(), #)%dG3)e  
new SelectionSort(), QbAEW m  
new ShellSort(), -S $Y0FDV  
new QuickSort(), )Oj%3  
new ImprovedQuickSort(), pEGHW;  
new MergeSort(), DoJ3zYEk  
new ImprovedMergeSort(), cC`PmDGq  
new HeapSort() ?0+J"FH# W  
}; Fmrl*tr  
6x_D0j%^]  
public static String toString(int algorithm){ \"=@uqar2  
return name[algorithm-1]; ^w}BXVn  
} DVyxe}  
<m?/yRE K2  
public static void sort(int[] data, int algorithm) { G-T2b,J [  
impl[algorithm-1].sort(data); ud,_^Ul  
} Xu5^ly8p9q  
V)r6bb{^  
public static interface Sort { Z o5.Yse  
public void sort(int[] data); 5l(NX  
} ]u O|YLWp  
;=ERm=  
public static void swap(int[] data, int i, int j) { <Okl.Iz>  
int temp = data; 3HmJixy  
data = data[j]; )eSD5hOI)  
data[j] = temp; `zRm "G  
} K~>ESMZ5  
} 3LD`Ep   
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