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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。 OZ6:u^OS]  
插入排序: ^:Fj+d  
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package org.rut.util.algorithm.support; -SUK [<=X  
aXh~w<5F  
import org.rut.util.algorithm.SortUtil; *1g3,NMA  
/** xzz0uk5  
* @author treeroot XS=f>e1<W  
* @since 2006-2-2 @!p0<&R@x  
* @version 1.0 l-?#oy  
*/ Mew,g:m:  
public class InsertSort implements SortUtil.Sort{ %Z+FX,AK  
H_FT%`iM  
/* (non-Javadoc) ;C,t`(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JiFB<Q\  
*/ c;.jo?RR2  
public void sort(int[] data) { "2z&9`VIY  
int temp; a7n`(}?Y  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); !4+ FN)  
} KtD XB>  
} Hb3t|<z  
} |./{,",  
rk &ME#<r  
} 7\[)5j  
iCtS<"@Yx  
冒泡排序: i$lp8Y2ih  
;*njS1@  
package org.rut.util.algorithm.support; _f"KB=A_x  
rVZlv3  
import org.rut.util.algorithm.SortUtil; i'p6#  
_0"s6D$  
/** 1'f&  
* @author treeroot  xq&r|el  
* @since 2006-2-2 rUh2[z8:  
* @version 1.0 X"g`hT"i  
*/ )>,ndKT~  
public class BubbleSort implements SortUtil.Sort{ }h1y^fuGi  
uSUog+i  
/* (non-Javadoc) A$70!5*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bMB*9<c~  
*/ qi$nG_<<Z  
public void sort(int[] data) { %>Mcme>(W  
int temp; u4|) A4n  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ^j7>Ul,  
if(data[j] SortUtil.swap(data,j,j-1); *JF7 B  
} |J$ Bj?  
} Egmp8:nZl@  
} w_#C8}2  
} ){*9$486  
}U|0F#0$  
} Pye/o  
:QIf0*.O  
选择排序: zE+^WeH|  
W/<Lp+p  
package org.rut.util.algorithm.support; 9D]bCi\  
#=N6[:,  
import org.rut.util.algorithm.SortUtil; @6b4YV h  
)zkr[;j~`  
/** S/dj])g  
* @author treeroot yM('!iG*/  
* @since 2006-2-2 Mh]4K" cs  
* @version 1.0 j937tn!Q  
*/ *#83U?  
public class SelectionSort implements SortUtil.Sort { M)3'\x :  
`#4q7v~>oe  
/* 'm0_pM1:D  
* (non-Javadoc) NZz^*Ela  
* <Vl`EfA(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <l5s[  
*/ T%4yPmY  
public void sort(int[] data) { UJ><B"  
int temp; o:`^1  
for (int i = 0; i < data.length; i++) { %E[ $np>  
int lowIndex = i; 8ib e#jlg  
for (int j = data.length - 1; j > i; j--) { SB,#y>Zv?  
if (data[j] < data[lowIndex]) { f`YHZ O  
lowIndex = j; AjJ/t4<  
} )j!%`g  
} Cz6bD$5  
SortUtil.swap(data,i,lowIndex); .>1vN+  
} s9SUj^  
} E: Ul_m8  
mc4|@p*  
} f.0HIc  
@H}{?-XyA  
Shell排序: poy_?7G  
ZEs^b  
package org.rut.util.algorithm.support; mbHMy[R  
.Hg{$SAC(w  
import org.rut.util.algorithm.SortUtil; g){gF(   
)}u?ftu\  
/** hqa6aYY x  
* @author treeroot <5zr|BTF]F  
* @since 2006-2-2 5?.!A 'zb  
* @version 1.0 P|ftEF  
*/ 8S5Q{[!  
public class ShellSort implements SortUtil.Sort{ #vc!SI  
M zF,is  
/* (non-Javadoc) f|Nkk*9$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $3xDjiBb  
*/ *0m|`- T  
public void sort(int[] data) { q#K0EAgC  
for(int i=data.length/2;i>2;i/=2){ mR$0Ij/v  
for(int j=0;j insertSort(data,j,i); |h6, .#n  
} N{<5)L~Y  
} !Wj`U$];  
insertSort(data,0,1); 3xgU=@!;  
} =&PO_t5)z  
4#W*f3d[@:  
/** EqOhzII^  
* @param data loUZD=Ph  
* @param j Oj8D+sC{  
* @param i &~'i,v|E  
*/ j Q8 T  
private void insertSort(int[] data, int start, int inc) { 9%2h e)Yqc  
int temp; (yoF  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ZCA= n  
} V P(JV  
} Jl|^^?  
} G?!8T91;  
%S^:5#9  
} H9Vn(A8&`  
,+X:#$  
快速排序: >1HXC2 Y  
ErFt5%FN.O  
package org.rut.util.algorithm.support; N*\r i0  
l;@bs  
import org.rut.util.algorithm.SortUtil; PP]7_h^ 2  
IFW7MF9V  
/** '<'5BeU  
* @author treeroot 3 K q /V_  
* @since 2006-2-2 %3. np  
* @version 1.0 dh1 N/[  
*/  Hs6Kki1  
public class QuickSort implements SortUtil.Sort{ K5z<n0X ~  
OTNI@jQ)  
/* (non-Javadoc) _Ud!tK*H  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +pQ3bX  
*/ u95D0S  
public void sort(int[] data) { qpzyl~g:C  
quickSort(data,0,data.length-1); dF5y' R'  
} >_$_fB  
private void quickSort(int[] data,int i,int j){ [zSt+K;  
int pivotIndex=(i+j)/2; F I~=A/:  
file://swap bdEI vf7  
SortUtil.swap(data,pivotIndex,j); lqa~ZF*  
!pHI`FeAV  
int k=partition(data,i-1,j,data[j]); 1$^r@rP  
SortUtil.swap(data,k,j); /FjdcH=  
if((k-i)>1) quickSort(data,i,k-1); Tl#2w=  
if((j-k)>1) quickSort(data,k+1,j); 6PC?*^v  
y1[@4TY]  
} "U$](k.<VA  
/** 2B5Ez,'#x  
* @param data o_5[}d  
* @param i c2L\m*^o  
* @param j [.6bxK  
* @return B ]sVlbt  
*/ / %iS\R%ca  
private int partition(int[] data, int l, int r,int pivot) { riRG9c |  
do{ 7r2p+LP[  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ;|W:,a{kS  
SortUtil.swap(data,l,r); b|iIdDK  
}  Sr_hD5!  
while(l SortUtil.swap(data,l,r); BB_(!omq[  
return l; jy_4W!4a  
} C0 /G1\  
X":2o|R  
} KTwP.!<v  
GkI{7GD:z  
改进后的快速排序: cob??|,\m  
|?hsMN  
package org.rut.util.algorithm.support; 8k+k\V{  
[ $"  
import org.rut.util.algorithm.SortUtil; Tt=;of{  
'I:_}q  
/** Bwu?DK  
* @author treeroot J|@D @\?7  
* @since 2006-2-2 qE VpkvEq  
* @version 1.0 *SpE XO  
*/ _;:_ !`  
public class ImprovedQuickSort implements SortUtil.Sort { }:QoYNq  
N vTp1kI]  
private static int MAX_STACK_SIZE=4096; .~TI%&#  
private static int THRESHOLD=10; 2|U6dLZ!  
/* (non-Javadoc) 3+q-yP#X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yU"#2 *C  
*/  j8]M}Q$  
public void sort(int[] data) { P>$+XrTE  
int[] stack=new int[MAX_STACK_SIZE]; ;jO+<~YP!  
zMM ~4?4  
int top=-1; .u`A4;;Gw  
int pivot; {xOzxLB;  
int pivotIndex,l,r; \ Co Z+  
hZ.](rD  
stack[++top]=0;  kKY,&Fn-  
stack[++top]=data.length-1; }5}>B *  
[Z&<# -  
while(top>0){ Zq H-]?)  
int j=stack[top--]; t:v>W8N53  
int i=stack[top--]; P0U&+^W"9  
4ElS_u^cP7  
pivotIndex=(i+j)/2; DZA '0-  
pivot=data[pivotIndex]; 5 +j):_  
&JD^\+7U:  
SortUtil.swap(data,pivotIndex,j); ~QUN O~  
9l:[jsk<d  
file://partition 5PP^w~n  
l=i-1; M&sQnPFH  
r=j; NL2D,  
do{ JNP6qM  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ^t$uDQ[hA  
SortUtil.swap(data,l,r); @W~aoq6  
} I :bT"N  
while(l SortUtil.swap(data,l,r); =Lnip<t>ja  
SortUtil.swap(data,l,j); sM%l:Fv  
8-cuaa  
if((l-i)>THRESHOLD){ qv |}>wU  
stack[++top]=i; :"b:uQ  
stack[++top]=l-1; Vn\jUEC  
} j0w@ \gO<  
if((j-l)>THRESHOLD){ n-,mC /4  
stack[++top]=l+1; &qIdT;^=I  
stack[++top]=j; fKtlfQG  
} VN$7r  
YkFERIa076  
} ,p!IFS`  
file://new InsertSort().sort(data); Dd-a*6|x  
insertSort(data); Uv~|Xj4.  
} }([}A`@  
/** BWB}bq  
* @param data "D KrQ,L  
*/ cm q4w&x/  
private void insertSort(int[] data) { e-1G\}E  
int temp; A]drNFE  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); QXO~DR1  
} T[c-E*{hR  
} ( )f)  
} xDsKb_  
;>F1?5P{  
} oMOh4NH,x  
/}iBrMD{[  
归并排序: fr$6&HDZ9  
;vbM C74J#  
package org.rut.util.algorithm.support; {>XoE %  
6Ypc]ym=J  
import org.rut.util.algorithm.SortUtil; ] ;CJ6gM~  
xuVc1jJH  
/** .M ID)PY-  
* @author treeroot |ZXz&Xor  
* @since 2006-2-2 rp2g./2  
* @version 1.0 !\O!Du  
*/ FJxb!- 0&  
public class MergeSort implements SortUtil.Sort{ mAJ'>^`^  
Kb1@+  
/* (non-Javadoc) r:4]:NKCi  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]KG.-o30  
*/ h~z}NP  
public void sort(int[] data) { u0g"x_3  
int[] temp=new int[data.length]; L {&=SR.  
mergeSort(data,temp,0,data.length-1); yNU}1_oK  
} {z;4t&5  
" SP6o  
private void mergeSort(int[] data,int[] temp,int l,int r){ Xs'qwL~{`  
int mid=(l+r)/2; >$)~B 4  
if(l==r) return ; =^_a2_BBl  
mergeSort(data,temp,l,mid); G2+ gEg  
mergeSort(data,temp,mid+1,r); {vZAOz7#  
for(int i=l;i<=r;i++){ u`Y~r<?P(  
temp=data; d\tY-X3  
} FV,aQ#  
int i1=l; Dca,IaT'  
int i2=mid+1; )|AxQPd  
for(int cur=l;cur<=r;cur++){ -})zRL0!'  
if(i1==mid+1) Z+[W@5q  
data[cur]=temp[i2++]; M-q5Jfm  
else if(i2>r) rw0s$~'  
data[cur]=temp[i1++]; .j=mT[N,I  
else if(temp[i1] data[cur]=temp[i1++]; %Y5F@=>&  
else f&RjvVP?s  
data[cur]=temp[i2++]; ^62I 5k/u  
} <U\8&Uv>  
}  Q0,eE:  
#JXXq%4 @  
} UN:qE oS  
3TS:H1n  
改进后的归并排序: D,(:))DmR  
,ei=w,O  
package org.rut.util.algorithm.support; T7O)  
QXl~a%lB  
import org.rut.util.algorithm.SortUtil; jpTk@  
oL<5hN*D  
/** _#{qDG=  
* @author treeroot ?C   
* @since 2006-2-2 ?I"?J/zm  
* @version 1.0 Mm9*$g!R  
*/ XV`8Vb  
public class ImprovedMergeSort implements SortUtil.Sort { m| 7v76(  
2$A"{2G  
private static final int THRESHOLD = 10; J |UFuD  
S-</(,E}|  
/* }m7$,'C%P  
* (non-Javadoc) )ZFc5m^+u  
* TqOH(= {  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J(= y$8xje  
*/ (N)>?r@n`  
public void sort(int[] data) { _9Rj,  
int[] temp=new int[data.length]; R\/tKZJjb  
mergeSort(data,temp,0,data.length-1); _5$L`&  
} #YK3Ogb,  
t=s.w(3t  
private void mergeSort(int[] data, int[] temp, int l, int r) { ziM@@$ .F  
int i, j, k; kmtkh "  
int mid = (l + r) / 2; Z5EII[=$o  
if (l == r) b@K1;A! S  
return; }qZ^S9  
if ((mid - l) >= THRESHOLD) GJHJ?^%  
mergeSort(data, temp, l, mid); f;Ijl0d@  
else p1mAoVxR  
insertSort(data, l, mid - l + 1); && PZ;  
if ((r - mid) > THRESHOLD) 7  `c!  
mergeSort(data, temp, mid + 1, r); ]v]:8>N  
else W ,v0~  
insertSort(data, mid + 1, r - mid); wqJl[~O$  
pEX Q  
for (i = l; i <= mid; i++) { /WK1(B:  
temp = data; P.1Z@HC  
} V-X Ty iv  
for (j = 1; j <= r - mid; j++) { pqju@FD *  
temp[r - j + 1] = data[j + mid]; D>Rlm,U  
} '- #QK'p  
int a = temp[l]; G-sQL'L[U  
int b = temp[r]; $'<$:;4b3  
for (i = l, j = r, k = l; k <= r; k++) { EV-# E  
if (a < b) { Bqb`WX[<`  
data[k] = temp[i++]; 'R42N3|F  
a = temp; zvdIwV&oT  
} else { S1C#5=  
data[k] = temp[j--]; Q]VG6x  
b = temp[j]; i<=2 L?[.I  
} 6KD-nr{S  
} ZW@cw}  
} Ol|fdQ  
CLJn+Y2  
/** 0V`~z-#  
* @param data ZjrBOb  
* @param l ej=}OH4  
* @param i : Cli8#  
*/ Wc;N;K52   
private void insertSort(int[] data, int start, int len) { roe_H>  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <yvo<R^30  
} B[+b%a3  
} c+8 Y|GB  
} _x,(576~  
} /ZH*t\  
NJOV!\k  
堆排序: 6KPjZC<  
TB84}  
package org.rut.util.algorithm.support; &SPr#OkW  
ilZ5a&X;  
import org.rut.util.algorithm.SortUtil; !0):g/2h  
&+ H\ST(/  
/** I'N!j>5oX  
* @author treeroot BuxU+  
* @since 2006-2-2 'AmA3x)9u  
* @version 1.0 PGVP0H+RV  
*/ U#XW}T=|  
public class HeapSort implements SortUtil.Sort{ :/RvtmW  
J{L d)Q,^  
/* (non-Javadoc) #'RfwldD9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ) M(//jX  
*/ C+mPl+}w  
public void sort(int[] data) { D}-HWJQA3  
MaxHeap h=new MaxHeap(); P*hYh5a  
h.init(data); bQI.Qk  
for(int i=0;i h.remove(); w6^TwjjZ$  
System.arraycopy(h.queue,1,data,0,data.length); (Fq]y5  
} f2v~: u  
(#>Q#Izr  
private static class MaxHeap{ ,jD-fL/:  
.f!:@fX>=  
void init(int[] data){ G%h+KTw  
this.queue=new int[data.length+1]; 7;?7q  
for(int i=0;i queue[++size]=data; f3:dn7  
fixUp(size); RK)ikLgp  
} u9]M3>  
} %+UTs'I  
ft iAty0n  
private int size=0; ]I;owk,  
o_ [I#PT  
private int[] queue; yBv4 xKMH  
NL!xk cXO  
public int get() { .v9i|E=<~  
return queue[1];  BrZ17  
} Q^?$2ck=  
{?X +Yw  
public void remove() {  ;CV'  
SortUtil.swap(queue,1,size--); Z 8GIZ  
fixDown(1); g|4>S<uC  
} ^?0?*  
file://fixdown %(s2{$3  
private void fixDown(int k) { ma"M?aM  
int j; A v;NQt8ut  
while ((j = k << 1) <= size) { dKw[#(m5v  
if (j < size %26amp;%26amp; queue[j] j++; %uo#<Ny/ I  
if (queue[k]>queue[j]) file://不用交换 c^5fhmlt  
break; twaH20  
SortUtil.swap(queue,j,k); 2&AX_#P  
k = j; Q2Uk0:M  
} <YCR^?hJSi  
} i=fhK~Jd  
private void fixUp(int k) { wGHVq fm5  
while (k > 1) { ^a!oq~ZSy  
int j = k >> 1; ?3v-ppw%  
if (queue[j]>queue[k]) QPvWdjf#mM  
break; )[yKO  
SortUtil.swap(queue,j,k); &iy7It  
k = j; 5D3&6DCH  
} C?6q ]k]r  
} -:b<~S[  
2t=&h|6EW  
} 2{g&9  
piIGSC  
} (?.h<v1}  
EvA8<o  
SortUtil: " ;\EU4R  
+hH7|:JQ  
package org.rut.util.algorithm; V {}TG]  
F0kQ/x  
import org.rut.util.algorithm.support.BubbleSort; +5kQ;D{+  
import org.rut.util.algorithm.support.HeapSort; *$mb~k^R  
import org.rut.util.algorithm.support.ImprovedMergeSort; :U @L$  
import org.rut.util.algorithm.support.ImprovedQuickSort; Jr>Nc}!U  
import org.rut.util.algorithm.support.InsertSort; ^{E_fQJX  
import org.rut.util.algorithm.support.MergeSort; f uH3C~u7<  
import org.rut.util.algorithm.support.QuickSort; nGTqW/k[+s  
import org.rut.util.algorithm.support.SelectionSort; Fg2/rC:_  
import org.rut.util.algorithm.support.ShellSort; cn9=wm\\  
E6-~  
/** &G3$q,`H  
* @author treeroot GB6(WAmr  
* @since 2006-2-2 +>% AG&Pc  
* @version 1.0 'sk M$jr  
*/ ;b_<5S  
public class SortUtil { vgr 5j  
public final static int INSERT = 1; \,I{*!hw  
public final static int BUBBLE = 2; a3He-76  
public final static int SELECTION = 3; Q"oJhxS  
public final static int SHELL = 4; %r:4'$E7|  
public final static int QUICK = 5; KkR.p,/  
public final static int IMPROVED_QUICK = 6; Lk-h AN{[  
public final static int MERGE = 7; }F3}"Ik'L  
public final static int IMPROVED_MERGE = 8; +]Z *_?j9{  
public final static int HEAP = 9; M IUB]  
;;EFiaA  
public static void sort(int[] data) { owO &[D/  
sort(data, IMPROVED_QUICK); p\]rxtm  
} 1}CJ&  
private static String[] name={ SNHAL F  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P>|sCF  
};  Y@b|/+  
4%u\dTg/B  
private static Sort[] impl=new Sort[]{ #"o`'5  
new InsertSort(), X8XE_VtP  
new BubbleSort(), 2nSz0 .  
new SelectionSort(), @,pn/[  
new ShellSort(), H\|H]:CE  
new QuickSort(), P;ZVv{mT  
new ImprovedQuickSort(), Vz y )jf  
new MergeSort(), 3tmS/ tQp  
new ImprovedMergeSort(), GbC JGqOR  
new HeapSort() }5QUIK~NA  
}; U(<~("ocN  
xp"F)6  
public static String toString(int algorithm){ os+ ]ct  
return name[algorithm-1]; ,Fu[o6x<^  
}  w4UJXc  
!nF.whq  
public static void sort(int[] data, int algorithm) { pq]>Ep  
impl[algorithm-1].sort(data); m2F+ 6G  
} 2o0WS~}5  
S Fqq(K2u  
public static interface Sort { X>MDX.Z  
public void sort(int[] data); 70nBC  
} 2j[; M-3  
2(Nf$?U @0  
public static void swap(int[] data, int i, int j) { ;^8X(R  
int temp = data; d ?,wEfwp  
data = data[j]; <!?ZH"F0  
data[j] = temp;  t&G #%  
} 1kh()IrA  
} ^ pocbmg  
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