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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。 V8nz-DL{  
插入排序: $ o5V$N D  
V|3yZ8lE  
package org.rut.util.algorithm.support; {V%%^Zhwy  
z^P* :  
import org.rut.util.algorithm.SortUtil; w%8ooQ|C  
/** 4aalhy<j  
* @author treeroot K#l  -?  
* @since 2006-2-2 (RDa,&  
* @version 1.0 S om. qD  
*/ C,|nmlDN  
public class InsertSort implements SortUtil.Sort{ sd]54&3A  
o\@ A2r3  
/* (non-Javadoc) #JL&]Z+X6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bl" (<TM  
*/ DMAf^.,S  
public void sort(int[] data) { jU]]:S4xD/  
int temp; tDC0-N&6S~  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Hi; K"H]x1  
} ldAov\X  
} =E [4H  
} fqcU5l[v,  
"ibK1}-  
}  3}>:  
c y=I0  
冒泡排序: :LZ-da"QR  
~rgf{oGz  
package org.rut.util.algorithm.support; C2+{U  
0Y5LDP  
import org.rut.util.algorithm.SortUtil; !Qv5"_  
b$d J?%W  
/** g(-;_j!=  
* @author treeroot F^.om2V|9  
* @since 2006-2-2 DAjG *K{  
* @version 1.0 "XGD:>Q.  
*/ $Cz1C  
public class BubbleSort implements SortUtil.Sort{ z $9@j2  
:dc"b?Ch  
/* (non-Javadoc) [kPD`be2#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) - *:p.(c  
*/ \ V[;t-  
public void sort(int[] data) { |RR"'o_E  
int temp; N@k3$+ls  
for(int i=0;i for(int j=data.length-1;j>i;j--){ %*$5!;  
if(data[j] SortUtil.swap(data,j,j-1); I*^5'N'  
} >%9^%p^  
} M:R8<.{  
} 8h*t55  
} \:]DFZ=!  
Yuwc$Qp)  
} Iq)(UfaSve  
seu ~'s-  
选择排序: J6*f Uh  
[dl+:P:zc  
package org.rut.util.algorithm.support; J"diFz+20  
yt. f!"  
import org.rut.util.algorithm.SortUtil; MMMqG`Px  
_~tm7o+js  
/** 9z #P  
* @author treeroot py]KTRzy  
* @since 2006-2-2 'z)hG#{I  
* @version 1.0 #":: ' ?,  
*/ }x]&L/  
public class SelectionSort implements SortUtil.Sort { Ks#A<! ;=  
|)9thIQF  
/* CK2B  
* (non-Javadoc) IrJ+Jov  
* q7|:^#{av  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $ K})Q3FNi  
*/ RoX &+~  
public void sort(int[] data) { VKy5=2&  
int temp; u+m4!`  
for (int i = 0; i < data.length; i++) { bMsECA&  
int lowIndex = i; W]_g4,T>  
for (int j = data.length - 1; j > i; j--) { wtSvJI~o)  
if (data[j] < data[lowIndex]) { Y=E9zUF  
lowIndex = j; @}(SR\~N]  
} \^9pW 2v  
} fuMN"T 6%+  
SortUtil.swap(data,i,lowIndex); rIVvO  
} b vRB  
} A;,Dg=FL/  
wZ jlHe  
} s O=4IBE  
X]!D;7^  
Shell排序: fz3lR2~G  
Yrxk Kw#  
package org.rut.util.algorithm.support; m2(E>raV6  
B!}BM}r  
import org.rut.util.algorithm.SortUtil; mZ7B<F[qV  
Wwhgo.Wx  
/** } Gr&w-v  
* @author treeroot %G[/H.7s-  
* @since 2006-2-2 [(ygisqt  
* @version 1.0 |c0,  
*/ P$ucL~r  
public class ShellSort implements SortUtil.Sort{ > H BJk:  
6aY>lkp  
/* (non-Javadoc) (rcMA>2=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9 Kbw GmSU  
*/ KQ{Lt?S  
public void sort(int[] data) { ?v4E<iXs  
for(int i=data.length/2;i>2;i/=2){   WK==j1  
for(int j=0;j insertSort(data,j,i); 3+(z_!Qh  
} 1k[GuG%/K  
} % :/_f  
insertSort(data,0,1); <bUXC@3W  
} mb1Vu  
? %(spV  
/** "|t!7hC  
* @param data OCNPi4  
* @param j :, _!pe;H  
* @param i f*m[|0qI<X  
*/ V_"f|[1  
private void insertSort(int[] data, int start, int inc) { ((<`zx  
int temp; :q (&$  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 9S>g6}[E#0  
} `/4:I  
} F*` t"7Lm  
} 6kR\xP]Kr  
8(lR!!=q  
} m`}{V5;  
r N5tI.iC  
快速排序: sg AzL  
A@$kLex  
package org.rut.util.algorithm.support; H}ZQ?uK;  
g"K>5Cb  
import org.rut.util.algorithm.SortUtil; <)U4Xz?  
cb$-6ZE/  
/** .L EY=j!-s  
* @author treeroot lH2wG2  
* @since 2006-2-2 I g \#f  
* @version 1.0 zT#`qCbT'J  
*/ PsnGXcj  
public class QuickSort implements SortUtil.Sort{ X`JV R"=4  
QDTNx!WL  
/* (non-Javadoc) :P+\p=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FvdeQsc!  
*/ %d;ezY'2  
public void sort(int[] data) { ?LP9iY${  
quickSort(data,0,data.length-1); }}r> K}  
} Or0O/\D)  
private void quickSort(int[] data,int i,int j){ 3EK9,:<Cf  
int pivotIndex=(i+j)/2; #hw>tA6  
file://swap /+|#^:@  
SortUtil.swap(data,pivotIndex,j); v=?2S  
,wAz^cK|  
int k=partition(data,i-1,j,data[j]); w_wslN,)  
SortUtil.swap(data,k,j); HM9fjl[  
if((k-i)>1) quickSort(data,i,k-1); r ?m6$  
if((j-k)>1) quickSort(data,k+1,j); *>[3I}mM  
(k?7:h  
} =^;P#kX  
/** +.yT/y"  
* @param data L{fFC%|l2L  
* @param i kg97S  
* @param j kHK0(bYK  
* @return tJ0NPI56yP  
*/ ,5Vt]#F5@  
private int partition(int[] data, int l, int r,int pivot) { ec3<%+0f  
do{ (eWPis[  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); \cJa;WM>  
SortUtil.swap(data,l,r); 8V/L:h#7  
} fS&6  
while(l SortUtil.swap(data,l,r); ]d}0l6  
return l; ~@W*r5/  
} \wvg,j=  
a[JZ5D  
} 1J+3a-0  
KMe.i'  
改进后的快速排序: /J8o_EV  
ZnQ27FcW  
package org.rut.util.algorithm.support; gm}C\q9  
n4XMN\:g{  
import org.rut.util.algorithm.SortUtil; l]/> `62  
+}\29@{W  
/** b/G8M r  
* @author treeroot .8%vd  
* @since 2006-2-2 iPNd!_  
* @version 1.0 =^"~$[z(  
*/ q>c+bo 6  
public class ImprovedQuickSort implements SortUtil.Sort { JH-nvv  
P)4x   
private static int MAX_STACK_SIZE=4096; Z!k5"\{0pE  
private static int THRESHOLD=10; pO5v*oONz+  
/* (non-Javadoc) ^Y#@$c  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i{4'cdr?  
*/ Kl!DKeF  
public void sort(int[] data) { 37,L**Dgs  
int[] stack=new int[MAX_STACK_SIZE]; I"~xDa!  
rR3m' [  
int top=-1; v5P*<U Ax  
int pivot; ?@yank|  
int pivotIndex,l,r;  %L{  
]9dx3<2_I  
stack[++top]=0; Cd$dn HVh  
stack[++top]=data.length-1; [`cdlx?Eh  
aGdpec v  
while(top>0){ ttTI#Fr2  
int j=stack[top--]; WFQ*s4 R(  
int i=stack[top--]; AfuXu@UZ_/  
p3{x<AO/  
pivotIndex=(i+j)/2; {/th`#o4b  
pivot=data[pivotIndex]; >2 FAi.,  
5~v(AB(x  
SortUtil.swap(data,pivotIndex,j); )R8%wk?2  
*vRNG 3D/  
file://partition ce 7Yr*ZB  
l=i-1; (R9QBZP5  
r=j; 5B8V$ X  
do{ Q:'qw#P/C  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); CM+F7#T?n  
SortUtil.swap(data,l,r); $,xtif0  
} c,+L +  
while(l SortUtil.swap(data,l,r); c13vEn!c  
SortUtil.swap(data,l,j); D|u^8\'.  
} IIK~d,  
if((l-i)>THRESHOLD){ 7yc9`j}]  
stack[++top]=i; !N@S^JD6  
stack[++top]=l-1; ~.\73_M=A  
} 0BbiQXU  
if((j-l)>THRESHOLD){ $.suu^>^w  
stack[++top]=l+1; lGD%R'}  
stack[++top]=j; .( TQ5/ ~  
} L:|X/c9r[  
+0oyt?  
} =;'ope(?S  
file://new InsertSort().sort(data); }1X11+/W  
insertSort(data); {ar5c&<  
} q\ \8b{~  
/** qK 9L+i  
* @param data /8P4%[\  
*/ 7 K;'7  
private void insertSort(int[] data) { Fy4<  
int temp; 2XETQ;9  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); CrRQPgl+u  
} 5WtQwN~  
} }"g21-T^  
} m2-fi*Mgg  
Ti9:'I  
} N+C%Z[gt[  
q:EzKrE  
归并排序: 0x3 h8fs  
^5FJ}MMJf  
package org.rut.util.algorithm.support; 'NG^HLD/  
[t "_}t=w  
import org.rut.util.algorithm.SortUtil; 34+)-\xt:  
~_f |".T  
/** OTNZ!U/)j  
* @author treeroot .NNcc4+  
* @since 2006-2-2 @Le ^-v4  
* @version 1.0 f2R+5`$  
*/ Yq)YS]  
public class MergeSort implements SortUtil.Sort{ ;S{Ld1;  
Gct&}]3pm  
/* (non-Javadoc) l?yZtZ8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W=;(t  
*/ C,VqT6E<  
public void sort(int[] data) { @=MZ6q  
int[] temp=new int[data.length]; i$ fjr[$B  
mergeSort(data,temp,0,data.length-1); Qn'r+X5t  
} ^%4( %68  
69<rsp(p  
private void mergeSort(int[] data,int[] temp,int l,int r){ pT_e;,KW U  
int mid=(l+r)/2; om*tdG  
if(l==r) return ; 8Jib|#!  
mergeSort(data,temp,l,mid); &ls!IN  
mergeSort(data,temp,mid+1,r); sGDrMAQt  
for(int i=l;i<=r;i++){ )@lo ';\  
temp=data; n/-p;#R  
} A Eyr_!G,  
int i1=l; nkCRe  
int i2=mid+1; i-"h"nF"  
for(int cur=l;cur<=r;cur++){ v%l|S{>(  
if(i1==mid+1) 5Ky9Pz  
data[cur]=temp[i2++]; ,mE]?XyO  
else if(i2>r) 43orR !.Z  
data[cur]=temp[i1++]; H/v37%p7  
else if(temp[i1] data[cur]=temp[i1++]; 7,&]1+n  
else i>kNz(*  
data[cur]=temp[i2++]; (J,Oh  
} 9>$%F;JP44  
} ?GMeA}j  
|"tV["a  
} g)r ,q&*  
~_l: b  
改进后的归并排序: M'!!EQo  
1WA""yb  
package org.rut.util.algorithm.support; u):Rw  
r^o}Y  
import org.rut.util.algorithm.SortUtil; 1r-,V X7  
ow>[#.ua  
/** aY1#K6(y  
* @author treeroot J\,e/{,X  
* @since 2006-2-2 :EldP,s#x%  
* @version 1.0 Z]>e& N  
*/ C7*Yg$`{  
public class ImprovedMergeSort implements SortUtil.Sort { r{:la56Xd  
:#!F 7u  
private static final int THRESHOLD = 10; ~pBxFA  
dU04/]modD  
/* xzf)_ <  
* (non-Javadoc) !E>3N:  
* ])ZJ1QL1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :-'ri Ry  
*/ CYic_rF$  
public void sort(int[] data) { WZO 0u  
int[] temp=new int[data.length]; >5@ 0lYhH  
mergeSort(data,temp,0,data.length-1); T.Y4L  
} ABYW1K=  
ah@GSu;7  
private void mergeSort(int[] data, int[] temp, int l, int r) { ~(doy@0M  
int i, j, k; WaO;hy~us  
int mid = (l + r) / 2; "@'9+$i6  
if (l == r) By"ul:.D  
return; H-y-7PW*~  
if ((mid - l) >= THRESHOLD) ?B31 t9  
mergeSort(data, temp, l, mid); 9lwo/(s  
else ^J=txsx  
insertSort(data, l, mid - l + 1); *q 9$SDm  
if ((r - mid) > THRESHOLD) { dx yBDK  
mergeSort(data, temp, mid + 1, r); AE@Rn(1.  
else KB-#):'  
insertSort(data, mid + 1, r - mid); L$07u{Q  
)t 7HioQ  
for (i = l; i <= mid; i++) { -`<N,  
temp = data; ]$k m  
} Gqu0M`+7  
for (j = 1; j <= r - mid; j++) { rlh6\Fa  
temp[r - j + 1] = data[j + mid]; HOI`F3#XI  
} w0>)y -  
int a = temp[l]; *xNjhR]7v  
int b = temp[r]; s5|)4Z ac  
for (i = l, j = r, k = l; k <= r; k++) { H_$f v_  
if (a < b) { WQ`P^5e  
data[k] = temp[i++]; BHBR_7  
a = temp; AyXKhj#Ml  
} else { vb2O4%7tw  
data[k] = temp[j--]; _5 -"<  
b = temp[j]; ~x#-#nuh"  
} E$fy*enON  
} gM]/Y6 *$b  
} Zl/+HU~  
UE](`|4H  
/** 78A4n C  
* @param data H zK=UcD  
* @param l \}(-9dr  
* @param i ol>=tk 8}  
*/ }{PtQc6RL!  
private void insertSort(int[] data, int start, int len) { 4y)1*VU:  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D#(Pg  
} bJ[1'Es `  
} blS4AQ?b^  
} U}5KAi 9Z  
} ;L{y3CWT  
dTNgrW`4  
堆排序: XX;%:?n  
JIkmtZv  
package org.rut.util.algorithm.support; K1yM'6 Zw  
unB "dE  
import org.rut.util.algorithm.SortUtil; *Fs^T^ ?r  
Fsdn2{g8U  
/** g[Y$SgJ  
* @author treeroot <0MUn#7'  
* @since 2006-2-2 $a]dxRkz  
* @version 1.0 *gKr1}M  
*/ UY^f|f&  
public class HeapSort implements SortUtil.Sort{ =z dti'2{4  
7tnzgtal  
/* (non-Javadoc) 9]9(o  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }gt~{9?c  
*/ B)iJH  
public void sort(int[] data) { [! o -F;  
MaxHeap h=new MaxHeap(); z[Qv}pv  
h.init(data); 3Pq)RD|hn  
for(int i=0;i h.remove(); *GMRu,u2  
System.arraycopy(h.queue,1,data,0,data.length); ZaV@}=Rd8  
} A`8If  
YDL)F<Y  
private static class MaxHeap{ n*uZ=M_/Q  
_E 8SX v  
void init(int[] data){  #pK)  
this.queue=new int[data.length+1]; lD XH<W?  
for(int i=0;i queue[++size]=data; S^.=j oI  
fixUp(size); sa ?;D  
} gr7_oJ:R  
} 2y,wN"qH*  
i vk|-C'\  
private int size=0; hkxZ=l  
'r0gqtB  
private int[] queue; `VbG%y&I  
_!D$Aj  
public int get() { N"{o3QmA  
return queue[1]; AJ}Q,E  
} pQi -  
^~od*:  
public void remove() { 5{[0Clb)  
SortUtil.swap(queue,1,size--); R& A.F+Zgt  
fixDown(1); h:wD &Fh8  
} 8'$n|<1X  
file://fixdown 04TV. /uA  
private void fixDown(int k) { }"v "^5  
int j; im"v75 tc  
while ((j = k << 1) <= size) { NgKNT}JDv  
if (j < size %26amp;%26amp; queue[j] j++; !k^\`jMzw  
if (queue[k]>queue[j]) file://不用交换 7y&`H  
break; n_j[hA  
SortUtil.swap(queue,j,k); ty ?y&~axk  
k = j; g=wnly  
} Q]C1m<x  
} Ym 6[~=~EK  
private void fixUp(int k) { .*{LPfD|  
while (k > 1) { SV >EB;<  
int j = k >> 1; tee%E=P  
if (queue[j]>queue[k]) j.sf FS  
break; ,==lgM2V>  
SortUtil.swap(queue,j,k); e"Z~%,^A  
k = j; V Puzu|  
} 0FBifK  
} W=drp>Uj  
+9t@eHJT1  
} pmZr<xs   
vnE,}(M  
} 4I$#R  
9S}PCAA;  
SortUtil: a[!':-R`s  
:Fh* 4 &Z  
package org.rut.util.algorithm; :hr%iu  
\VW.>@s~  
import org.rut.util.algorithm.support.BubbleSort; b.F2m(e2  
import org.rut.util.algorithm.support.HeapSort; pdM|dGq^  
import org.rut.util.algorithm.support.ImprovedMergeSort;  c`TgxMu  
import org.rut.util.algorithm.support.ImprovedQuickSort; NW$Z}?I  
import org.rut.util.algorithm.support.InsertSort; |jlR] ,  
import org.rut.util.algorithm.support.MergeSort;  -H{{  
import org.rut.util.algorithm.support.QuickSort; k~R_Pq S  
import org.rut.util.algorithm.support.SelectionSort; iIg_S13  
import org.rut.util.algorithm.support.ShellSort; ,+XQ!y%  
NGNn_1  
/** ~{J.br`  
* @author treeroot K:y>wyzl  
* @since 2006-2-2 Li}yK[\]  
* @version 1.0 qzq>C"z\Y$  
*/ &" =inkh  
public class SortUtil { Q-AN~k8+)[  
public final static int INSERT = 1; k5^'b#v  
public final static int BUBBLE = 2; R6ywc "xE  
public final static int SELECTION = 3; Fik*7!XQ8  
public final static int SHELL = 4; o9JJ_-O"  
public final static int QUICK = 5; +:D0tYk2B  
public final static int IMPROVED_QUICK = 6; #+XKfumLk  
public final static int MERGE = 7; K}6}Opr,Tt  
public final static int IMPROVED_MERGE = 8; { aU~[5L3(  
public final static int HEAP = 9; 3?C$Tl2G8  
'kp:yI7w  
public static void sort(int[] data) { <w[)T`4N  
sort(data, IMPROVED_QUICK); zg]9~i8  
} ~s+\Y/@A  
private static String[] name={ 9+pnpaZB0  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" } ZV$_  
}; /Z-|E  
P'zA=Rd&~>  
private static Sort[] impl=new Sort[]{ yVSJn>l!  
new InsertSort(), Hh,\>= ':  
new BubbleSort(), j  $L  
new SelectionSort(), ?'^xO:  
new ShellSort(), RE*;nSVFt  
new QuickSort(), K@+&5\y]  
new ImprovedQuickSort(), hD sFsG  
new MergeSort(), 23 3jT@Z  
new ImprovedMergeSort(), iX}EJD{f  
new HeapSort() pX"f "  
}; I/t2c=f  
po!0j+r3  
public static String toString(int algorithm){ L_O m<LO2  
return name[algorithm-1]; Y'58.8hl  
} ?bY'J6n.  
nD|Bo 9  
public static void sort(int[] data, int algorithm) { rcAx3AK.  
impl[algorithm-1].sort(data); !Vy/-N  
} aR+vY1d"  
c.r]w  
public static interface Sort { E<Efxb' p  
public void sort(int[] data); -:Yx1Y3 [  
} cJGU~\  
5Q =o.wf  
public static void swap(int[] data, int i, int j) { @}qMI   
int temp = data; \K55|3~R  
data = data[j]; K '7M\:zy  
data[j] = temp; C,&r7  
} vT)FLhH6*  
} sBt,y _LW  
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