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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。 ~LQzt@G4  
插入排序: w[C*w\A\M  
Jj?HOtaM  
package org.rut.util.algorithm.support; Zz"8  
m`}mbm^  
import org.rut.util.algorithm.SortUtil; {@6:kkd  
/** UE/JV_/S;  
* @author treeroot <cU%yA710  
* @since 2006-2-2 h'?v(k!  
* @version 1.0 i%[+C  
*/ ,3N>`]Km'  
public class InsertSort implements SortUtil.Sort{ n'0r (  
CK1A$$gnz  
/* (non-Javadoc) RLZfXXMn  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 05g %5vHF  
*/ 7hTpjox2  
public void sort(int[] data) { ea]qX6)UZ  
int temp; u /]P  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); S`$%C=a.  
} "=1gA~T  
} "YaT1` Kr  
} @<`V q  
z%#-2&i  
} zXD/hM  
DQ30\b"gU  
冒泡排序: b3FKDm[  
*@p"  
package org.rut.util.algorithm.support; b.v +5=)B  
e^oGiL ~  
import org.rut.util.algorithm.SortUtil; k%X $@NP  
V:>r6  
/** >I/@GX/  
* @author treeroot .$7RF!p  
* @since 2006-2-2 '&e8;X  
* @version 1.0 _VVq&t}  
*/ qS9<_if2  
public class BubbleSort implements SortUtil.Sort{ z~3GgR"1d  
heL`"Y2'y>  
/* (non-Javadoc) 6 &0r/r  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @_?2iN?4Z  
*/ ^2);*X>  
public void sort(int[] data) { [T,Hpt  
int temp; o$eCd{HuX  
for(int i=0;i for(int j=data.length-1;j>i;j--){ T~k@Z  
if(data[j] SortUtil.swap(data,j,j-1); _ xTpW  
} xT]t3'y|-  
} S3l^h4  
} }I-nT!D'y  
} (' 7$K  
yQMwt|C4  
} e5 L_<V^Jo  
dW%t ph  
选择排序: Z|Oq7wzEH  
}8" |q3k  
package org.rut.util.algorithm.support; LWm1j:0  
<g%A2 lI  
import org.rut.util.algorithm.SortUtil; i@.Tv.NZ  
B}[f]8jrM  
/** z=) m6\  
* @author treeroot W#~7X  
* @since 2006-2-2 >mX6;6FF  
* @version 1.0 '?| 1\j  
*/ ]"b:IWPeI  
public class SelectionSort implements SortUtil.Sort { {0w2K82  
NXFi*  
/* ; cvMNU$fN  
* (non-Javadoc) Y(bB7tR  
* z?.9)T9_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X=KW >  
*/ ^!\AT!OT  
public void sort(int[] data) { ;b*qunJ3L  
int temp; n"T ^  
for (int i = 0; i < data.length; i++) { .Y{x!Q"  
int lowIndex = i; P%lD9<jED  
for (int j = data.length - 1; j > i; j--) { E`I(x&_  
if (data[j] < data[lowIndex]) { a`n)aXU l  
lowIndex = j; zmGHI! tP  
} o+&Om~W  
} ]sqLGmUL  
SortUtil.swap(data,i,lowIndex); w(&EZDe  
} G(.G>8pf  
} #p@GhI!6  
RW+u5Y  
} #jW-&a  
i7-~"g  
Shell排序: 6T'UWh0S  
O&BvWik  
package org.rut.util.algorithm.support; :>{!%-1Z  
Hz GwO^tbK  
import org.rut.util.algorithm.SortUtil; QF/_?Tm4  
(g@\QdH`|  
/** K~vJ/9"|R  
* @author treeroot HTT&T9]  
* @since 2006-2-2 RB+Jp  
* @version 1.0 ,{HQKHg  
*/ rL1yq|]I  
public class ShellSort implements SortUtil.Sort{ b(GV4%  
up'`)s'  
/* (non-Javadoc) zp;!HP;/=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T,/rC{  
*/ (T#$0RFq  
public void sort(int[] data) { $ ubU"  
for(int i=data.length/2;i>2;i/=2){ kZz'&xdv'.  
for(int j=0;j insertSort(data,j,i); B4RrUA32  
} mG\QF0h  
} / S]RP>cQ  
insertSort(data,0,1); cb /Q<i  
} S[3"?$3S  
 Fb(@i  
/** ?d-w#<AiV  
* @param data GLtd<M"  
* @param j y|ZL< L  
* @param i N9_* {HOy  
*/ Pl/ dUt_  
private void insertSort(int[] data, int start, int inc) { FSA%,b; U  
int temp; C*b[J  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ce\d35x!  
} >;I8w(  
} %m |I=P  
} .@,t}:lD  
=4eJ@EVM  
} &|Duc} t  
Jx.f DVJ  
快速排序: gUru=p  
(p%|F`  
package org.rut.util.algorithm.support; ,XO@ZBOM  
V+"%BrM  
import org.rut.util.algorithm.SortUtil; v;<gCzqQh  
^f! M"@  
/** {h+8^   
* @author treeroot +Umsr  
* @since 2006-2-2 <l5i%?  
* @version 1.0 [_'A(.  
*/ k\#;  
public class QuickSort implements SortUtil.Sort{ *,$5EN  
bXnUz?1!d  
/* (non-Javadoc) \s*M5oN]]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _U^[h!  
*/ \ZLi Y  
public void sort(int[] data) { $v@$C4  
quickSort(data,0,data.length-1); (kLaXayn  
} .kBkYK8*t  
private void quickSort(int[] data,int i,int j){ !vgY3S0?rq  
int pivotIndex=(i+j)/2; T/'z,,Y  
file://swap vdq=F|&  
SortUtil.swap(data,pivotIndex,j); oFU:]+.+D  
e-ta7R4  
int k=partition(data,i-1,j,data[j]); U.<j2K um  
SortUtil.swap(data,k,j); s=n4'`y1  
if((k-i)>1) quickSort(data,i,k-1); 'Bue*  
if((j-k)>1) quickSort(data,k+1,j); %b^4XTz  
6j|Ncv  
} Hx gC*-A$/  
/** rC-E+%y  
* @param data AZ3T#f![L@  
* @param i 0DicrnH8  
* @param j 3<^Up1CaZ  
* @return j?N<40z  
*/ '. "_TEIF  
private int partition(int[] data, int l, int r,int pivot) { d~u=,@FK  
do{ .2E/(VM  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); g5nJ0=9  
SortUtil.swap(data,l,r); F\D iT|?}  
} >N|?>M*  
while(l SortUtil.swap(data,l,r); F=Bdgg9s  
return l; x2B8G;6u  
} xT+_JT65  
|jiIx5qr  
} ;A,X,f  
*K|~]r(F?  
改进后的快速排序: H4y9\ -  
TTVmm{6  
package org.rut.util.algorithm.support; sq2:yt  
V~dhTdQ5}  
import org.rut.util.algorithm.SortUtil; Ok_}d&A  
7%  D4  
/** B"_O!  
* @author treeroot PB@IPnB-  
* @since 2006-2-2 [on_=N{W[  
* @version 1.0 JUr t %2  
*/ ?/o 8f7Z  
public class ImprovedQuickSort implements SortUtil.Sort { ?62Im^1/  
T aS1%(  
private static int MAX_STACK_SIZE=4096; \n[kzi7  
private static int THRESHOLD=10; 4QA~@pBX^{  
/* (non-Javadoc) <Z%=lwtX  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h+W$\T)  
*/ 2f[;U"  
public void sort(int[] data) { %LrOGr  
int[] stack=new int[MAX_STACK_SIZE]; SZKYq8ZA)V  
r:bJU1P1$s  
int top=-1; 3mHzOs\jU  
int pivot; s\;/U|P_  
int pivotIndex,l,r; }:2##<"\t  
relt7sK  
stack[++top]=0; 8ao-]QoMZ  
stack[++top]=data.length-1; i.t%a{gL  
LI%dJ*-V  
while(top>0){ 1Vu#:6%  
int j=stack[top--]; 01'>[h#_n  
int i=stack[top--]; @-sWXz*W  
uHKEt[PS$  
pivotIndex=(i+j)/2; @5^&&4>N  
pivot=data[pivotIndex]; aZb\uMePK  
JdS,s5Z>  
SortUtil.swap(data,pivotIndex,j); uN)c!='I  
AXlVH%'  
file://partition _f^6F<!  
l=i-1; :IZAdlz[@  
r=j; <L]Gk]k_R  
do{ D&):2F^9.  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); IAQ<|3Q  
SortUtil.swap(data,l,r); n[Q(q[ULV  
} +0&^.N  
while(l SortUtil.swap(data,l,r); e{E\YEc  
SortUtil.swap(data,l,j); o-=|}u]mz  
3Q$ 4`p;  
if((l-i)>THRESHOLD){ LTe ({6l0  
stack[++top]=i; t$$YiO  
stack[++top]=l-1; B@(d5i{h  
} pWxk^qhe/  
if((j-l)>THRESHOLD){ E<jajYj  
stack[++top]=l+1; p-i Fe\+  
stack[++top]=j; GURiW42  
} F1.Xk1y%  
V*@aE  
} T_S3_-|{==  
file://new InsertSort().sort(data); -~]H5er`  
insertSort(data); -zFJ)!/?  
} UDJjw  
/** .Exvuo`F  
* @param data gO8d2?Oh  
*/ W4o8]&A  
private void insertSort(int[] data) { Onq^|r's&  
int temp; ],weqs  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ." xP {  
} q KD  
} 4G,FJjE`p  
} %j\&}>P4$  
`$/a-K}  
} J3mLjYy  
1O`V_d)  
归并排序: r,JQR)l0@V  
:xr^E]  
package org.rut.util.algorithm.support; tBGLEeL/.  
)7& -DI1  
import org.rut.util.algorithm.SortUtil; |N`0G.#  
;8^k=8  
/** =_`q;Tu=  
* @author treeroot jQ V[zcM  
* @since 2006-2-2 _-C/s p^   
* @version 1.0 He=C\"  
*/ 5.\p]>|G1  
public class MergeSort implements SortUtil.Sort{ \}Am]Y/ w  
CK[8y&  
/* (non-Javadoc) A M[f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sMMOZ'bT  
*/ F- -g?Q^  
public void sort(int[] data) { 3WP\MM  
int[] temp=new int[data.length]; 7n#-3#_mG  
mergeSort(data,temp,0,data.length-1); ``CM7|)>`  
} d` ttWWPw  
n$C- ^3 c  
private void mergeSort(int[] data,int[] temp,int l,int r){ ]owgsR  
int mid=(l+r)/2; w(V%EEk  
if(l==r) return ; Hl}lxK,]  
mergeSort(data,temp,l,mid); cjN)3L{  
mergeSort(data,temp,mid+1,r); ]jD\4\M}  
for(int i=l;i<=r;i++){ GM2}]9  
temp=data; a_c(7bQ  
} (e'8>Pv  
int i1=l; LG:k}z/T  
int i2=mid+1; %Lh%bqGz  
for(int cur=l;cur<=r;cur++){ %/uLyCUZ  
if(i1==mid+1) uaO.7QSwN  
data[cur]=temp[i2++]; uZL]mwkj]  
else if(i2>r) W!<7OA g$  
data[cur]=temp[i1++]; x\Q}fk?{t  
else if(temp[i1] data[cur]=temp[i1++]; k( Sda>-  
else %"v:x?d$$o  
data[cur]=temp[i2++]; D=^&?@k<  
} p(pfJ^/:(  
} y>=YMD  
c~tl0XU1  
} ^<!R%"o-  
MZ}0.KmaZ  
改进后的归并排序: zd5=W"Y;]  
_fS\p|W(E  
package org.rut.util.algorithm.support; {?:]'c  
0 8)f  
import org.rut.util.algorithm.SortUtil; a"-uJn  
!!Ww#x~k$[  
/** ?+EAp"{j  
* @author treeroot b[:,p?:@  
* @since 2006-2-2 h)Fc<,vwBE  
* @version 1.0 $\ZWQct  
*/ N*36rR$^  
public class ImprovedMergeSort implements SortUtil.Sort { D\5+2 G  
)f$4: Pq  
private static final int THRESHOLD = 10; b|-)p+ba  
_b<;n|^  
/* 8$~oiK%fw  
* (non-Javadoc) </;e$fh`  
* b4L7]&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zd%f5L('  
*/ [KBa=3>{  
public void sort(int[] data) { 6qDt 6uB  
int[] temp=new int[data.length]; [lML^CYQ  
mergeSort(data,temp,0,data.length-1); ]D;*2Lw4&  
} ?Ojv<L-f.:  
jv.tg,c_6  
private void mergeSort(int[] data, int[] temp, int l, int r) { 1av#u:jy~>  
int i, j, k; J.JD8o9sa  
int mid = (l + r) / 2; L E\rc A  
if (l == r) C5^WJx[  
return; rSv,;v  
if ((mid - l) >= THRESHOLD) Z&>Cdgt*  
mergeSort(data, temp, l, mid); Jw5@#j  
else O>~@>/#  
insertSort(data, l, mid - l + 1); m4~ |z  
if ((r - mid) > THRESHOLD) )A*53>JV  
mergeSort(data, temp, mid + 1, r); MUbKlX  
else 0p.MH~mx  
insertSort(data, mid + 1, r - mid); E] g Lwg9K  
"y~*1kBu  
for (i = l; i <= mid; i++) { i ZPNss  
temp = data; `^/8dIya  
} Jf4` 2KN\  
for (j = 1; j <= r - mid; j++) { Y `8)`  
temp[r - j + 1] = data[j + mid]; *bo| F%NAz  
} #W8F_/!n|  
int a = temp[l]; I )yaR+l  
int b = temp[r]; d:iJUVpr  
for (i = l, j = r, k = l; k <= r; k++) { A5F (-  
if (a < b) { *~GI-h  
data[k] = temp[i++]; 8nBYP+t,e  
a = temp; kntY2FM  
} else { 5ph CEKt;  
data[k] = temp[j--]; 7*{l\^ism;  
b = temp[j]; >{ {ds--  
} 5|0/$ SWd*  
} \mLEwNhRY  
} ShL!7y*rT{  
\(7A7~  
/** syLdm3d|  
* @param data F&uiI;+zJ  
* @param l , poc!n//  
* @param i Y[)mHs2  
*/ ma-GvWD2  
private void insertSort(int[] data, int start, int len) { UH0l8ixc  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?i_/f}.K  
} #Pk{emYW  
} z59;Qk  
} G~C-tAB  
} T^] ]z}k  
5JaLE5-  
堆排序: jNx{*2._r  
Hd;NvNS  
package org.rut.util.algorithm.support; :0(^^6Q\  
U"|1@W#  
import org.rut.util.algorithm.SortUtil; HaL'/V~  
m$W2E.-$'#  
/** esZhX)dS  
* @author treeroot *YH!L{y  
* @since 2006-2-2 k@%5P-e}  
* @version 1.0 KsTGae;ds  
*/ o=94H7@  
public class HeapSort implements SortUtil.Sort{ ^L.I9a#]  
wQ+i l6  
/* (non-Javadoc) n~ $S  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w5y.kc;  
*/ !nL94:8U  
public void sort(int[] data) { y|B HSc3  
MaxHeap h=new MaxHeap(); "LDNkw'  
h.init(data); .<%q9Jy#  
for(int i=0;i h.remove(); 0LC]%x+"  
System.arraycopy(h.queue,1,data,0,data.length); cM9> V2:P  
} ~X2 # z |  
x])j]k  
private static class MaxHeap{ w(_:+-rqQ<  
nm\f$K>Pg  
void init(int[] data){ x&u@!# d]  
this.queue=new int[data.length+1]; + AjV0#n  
for(int i=0;i queue[++size]=data;  8zRw\]?  
fixUp(size);  :Kyr}-  
} Pl|I{l*o(`  
} xS/=9l/G  
8hy1yt6t4~  
private int size=0; (W"0c?i|]  
OY|9V  
private int[] queue; 1Zk1!> ?  
 n}b/9  
public int get() { hiVDN"$$  
return queue[1]; X`v6gv5qj  
} &q4~WRnzJk  
?5Z-w  
public void remove() { cuG;1,?b  
SortUtil.swap(queue,1,size--); bg9_$laDi  
fixDown(1); S]T71W<i  
} h$~$a;2cR  
file://fixdown z,C>Rh9Id  
private void fixDown(int k) { N0D5N(kH%  
int j; ZA_~o#0%  
while ((j = k << 1) <= size) { n|=yw6aV'  
if (j < size %26amp;%26amp; queue[j] j++; @DM NL sQ  
if (queue[k]>queue[j]) file://不用交换 LM"b%  
break; 70*yx?TV  
SortUtil.swap(queue,j,k); ;$!0pxL)s  
k = j; FDFVhcr  
} u0+<[Ia'q  
} uY3$nlhP6  
private void fixUp(int k) { DVs$3RL  
while (k > 1) { EG=U](8T  
int j = k >> 1; b[n6L5P5m2  
if (queue[j]>queue[k]) RvVF^~u  
break; Um/ g&k  
SortUtil.swap(queue,j,k); S=w~bz, /  
k = j; :SF8t`4`  
} {[H#lX 4  
} {iLr$ 89  
u4=ulgi  
} kmfz.:j{  
xr)m8H  
} ~fgS"F^7n  
|])Ko08*tE  
SortUtil: M@.?l=1X  
5oD%~Fk l  
package org.rut.util.algorithm; ,qgR+]?({  
N~yGtnW  
import org.rut.util.algorithm.support.BubbleSort; -cXVkH{  
import org.rut.util.algorithm.support.HeapSort; rPW 9lG  
import org.rut.util.algorithm.support.ImprovedMergeSort; ON_G D"  
import org.rut.util.algorithm.support.ImprovedQuickSort; 7,9zj1<  
import org.rut.util.algorithm.support.InsertSort; EX3;|z@5;  
import org.rut.util.algorithm.support.MergeSort; = U~\iJ  
import org.rut.util.algorithm.support.QuickSort; 8=sMmpB 7u  
import org.rut.util.algorithm.support.SelectionSort; i6h0_q8 >  
import org.rut.util.algorithm.support.ShellSort; DGAg#jh  
~65lDFY/  
/** *UG=dl#F#  
* @author treeroot yF&?gPh&  
* @since 2006-2-2 1\,wV,  
* @version 1.0 ^yF2xJ)9-  
*/ b WZ X  
public class SortUtil { dNs<`2m  
public final static int INSERT = 1; Q# $dp  
public final static int BUBBLE = 2; j\@|oW0  
public final static int SELECTION = 3; f['pHR%l2$  
public final static int SHELL = 4; PmE2T\{s!  
public final static int QUICK = 5; Sh5SOYLz  
public final static int IMPROVED_QUICK = 6; Op<|Oz$Q|l  
public final static int MERGE = 7; w~9=6|_  
public final static int IMPROVED_MERGE = 8; &4l >_  
public final static int HEAP = 9; =:'a)o  
nxYp9,c"  
public static void sort(int[] data) { x~O_v  
sort(data, IMPROVED_QUICK); .7GAGMNS  
} Vt," 5c  
private static String[] name={ %8GY`T:^  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J $<g" z3  
}; 3UX})mW  
Mio~CJ"?  
private static Sort[] impl=new Sort[]{ AJH-V 6  
new InsertSort(), 4mzWNr>fb  
new BubbleSort(), 9Lxj ]W2^  
new SelectionSort(), r*l:F{  
new ShellSort(), eqE%ofW  
new QuickSort(), |LDo<pE*V4  
new ImprovedQuickSort(), @oL<Ioh  
new MergeSort(), .@ElfPP(L  
new ImprovedMergeSort(), y/@.T\p  
new HeapSort() o93A:fc  
}; 3$`qy|=zO  
O8:,XTAN  
public static String toString(int algorithm){ =#<TE~n2(  
return name[algorithm-1]; ojitBo~  
} m<;&B   
\YBY"J  
public static void sort(int[] data, int algorithm) { !>+Na~eN  
impl[algorithm-1].sort(data); =2eG j'}  
} Z*|qbu)  
;-d :!*  
public static interface Sort { :bgi*pR{  
public void sort(int[] data); uNYHEs6%T$  
} xe6 2gaT  
MW+]w~7_Q  
public static void swap(int[] data, int i, int j) { =kvYE,,g_  
int temp = data; lLT;V2=osX  
data = data[j]; { O*maE"  
data[j] = temp; `?VB)  
} z<jWy$Ta;  
} U>^ -Db]  
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