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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。 Z'o0::k  
插入排序: EPo)7<|>  
AvL /gt:  
package org.rut.util.algorithm.support; %$BRQ-O  
7uBx  
import org.rut.util.algorithm.SortUtil; j }~?&yB  
/** B<W}:>3  
* @author treeroot b,~'wm8:A  
* @since 2006-2-2 ^} j~:EZb  
* @version 1.0 b1xE;0uR  
*/ Y;af|?U*6:  
public class InsertSort implements SortUtil.Sort{ KFM[caKeJO  
bGh&@&dHr  
/* (non-Javadoc) 'r'=%u$1C  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2[ sY?C  
*/ tqZ91QpW  
public void sort(int[] data) { s/1r{;q  
int temp; 0%xktf  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Nr4Fp`b8  
} Ff<cY%t  
} 3mgvWR  
} k-$Acv(  
_z_YJ7A>  
} d`\SX(C  
U$:^^Zt`B  
冒泡排序: 01Jav~WR  
>N3X/8KL%  
package org.rut.util.algorithm.support; $G=^cNB|JB  
C&O8fNB_  
import org.rut.util.algorithm.SortUtil; AArLNXzVW  
l&& i`  
/** 3h bHS~  
* @author treeroot >^8O:.  
* @since 2006-2-2 kV-<[5AWW  
* @version 1.0 at>_EiS  
*/ T*p7[}#  
public class BubbleSort implements SortUtil.Sort{ $.,PteYK  
j;$f[@0o  
/* (non-Javadoc) ,~L*N*ML  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ``xm##K  
*/ ?[Yn<|  
public void sort(int[] data) { 5{H)r   
int temp; wXNng(M7  
for(int i=0;i for(int j=data.length-1;j>i;j--){ )St0}?I~  
if(data[j] SortUtil.swap(data,j,j-1); 6Dd>ex!-A  
} k_g@4x1y*  
} 6 `6 I<OJ\  
} pbzt8 P[  
} {\Pk;M{Y&  
+;,{`*W+N  
} '[ c-$X2Ak  
WO>A55Xya  
选择排序: RqROl!6  
<h(AJX7wsD  
package org.rut.util.algorithm.support; EXdX%T\  
n'rq  
import org.rut.util.algorithm.SortUtil; ?M90K)&g{  
(JU8F-/9  
/** lU 9o"2  
* @author treeroot \^1^|a"  
* @since 2006-2-2 c coi  
* @version 1.0 ~HY)$Yp;  
*/ 4lo7yx  
public class SelectionSort implements SortUtil.Sort { 51:5rN(_  
cg )(L;  
/* #m#IBRD:  
* (non-Javadoc) &UDbH* !4=  
* ;apLMMsWC  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g.\b@0Uy'  
*/ CXUF=IE  
public void sort(int[] data) { R/u0,  
int temp; [w](x  
for (int i = 0; i < data.length; i++) { 2<7pe@c98  
int lowIndex = i; X8}r= K~  
for (int j = data.length - 1; j > i; j--) { l(Y32]Z   
if (data[j] < data[lowIndex]) { \]Y<d  
lowIndex = j; 2tU3p<[  
} S5|7D[*  
} :F d1k Jm  
SortUtil.swap(data,i,lowIndex); 4#t'1tzu#  
} &"u(0q  
} 7Kym|Zg  
t{,$?}  
} 2NFk#_9e~  
!fs ~ >  
Shell排序: %g*nd#wG  
K-YxZAf  
package org.rut.util.algorithm.support; *wAX&+);  
E[hSL#0  
import org.rut.util.algorithm.SortUtil; do`'K3a"  
}51QUFhL0  
/**  -raK  
* @author treeroot J^t0M\  
* @since 2006-2-2 zGe =l;  
* @version 1.0 C,,T7(: k  
*/ Ob%iZ.D|3<  
public class ShellSort implements SortUtil.Sort{ S|d /?}C|e  
d% @0xsU1  
/* (non-Javadoc) VK4UhN2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^PdD-tY<  
*/ "P.sK huo  
public void sort(int[] data) {  [6@bsXiw  
for(int i=data.length/2;i>2;i/=2){ Sw$&E  
for(int j=0;j insertSort(data,j,i); lC*xyO K  
} tL&_@PD)3  
} .KYs5Qu  
insertSort(data,0,1); pg!mOyn  
} .aL%}`8l?  
0gyvRM@ x[  
/** D}%VZA}].  
* @param data EAY+#>L*  
* @param j q2k}bb +  
* @param i -X*.scw  
*/ !}A`6z  
private void insertSort(int[] data, int start, int inc) { 4P C'7V=S  
int temp; y 2k's  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); DvN_}h^nX  
} &2@"zD  
} depCqz@  
} PazWMmI  
:z?T /9,C  
} HJr*\%D}1  
MPp:EH  
快速排序: ( *26aMp  
* *A JFc  
package org.rut.util.algorithm.support; vU/sQt8  
qHrIs-NR  
import org.rut.util.algorithm.SortUtil; }+ W5Snx  
<)cmI .J3  
/** ,:.8s>+i  
* @author treeroot <-d-. 8  
* @since 2006-2-2 c5CxR#O  
* @version 1.0 7F~Jz*,B*W  
*/ vr>J$(F  
public class QuickSort implements SortUtil.Sort{ W OYZ  
| /-# N  
/* (non-Javadoc) AED 9vDE  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D9(4%^HxV1  
*/ HVC|0}  
public void sort(int[] data) { ^wIP`dn  
quickSort(data,0,data.length-1); a$"Z\F:x  
} 4/o9K*M+  
private void quickSort(int[] data,int i,int j){ 54JI/!a  
int pivotIndex=(i+j)/2; &=8ZGjR< }  
file://swap $ z+ =lF  
SortUtil.swap(data,pivotIndex,j); yYC\a7Al4  
DL_M#c`<  
int k=partition(data,i-1,j,data[j]); hHt.N o  
SortUtil.swap(data,k,j); qztL M?iV  
if((k-i)>1) quickSort(data,i,k-1); L8;`*H  
if((j-k)>1) quickSort(data,k+1,j); EU5(s*A  
$YBH;^#  
} BZQJ@lk5  
/** c1]\.s  
* @param data IxP$ lx  
* @param i y9:o];/  
* @param j )P/~{Ci:T&  
* @return lr,i5n{6  
*/ ? !34qh  
private int partition(int[] data, int l, int r,int pivot) { E;a9RV|  
do{ WsM/-P1Y  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); bF@iO316H  
SortUtil.swap(data,l,r); ^w RD|  
} |?fc]dl1]  
while(l SortUtil.swap(data,l,r); KueI*\ p  
return l; iow8H' F  
} =66,$~g{  
]o8~b-  
} V[| k:($  
-}JRsQ+rgM  
改进后的快速排序: atFu KYI  
!hPe*pPVV)  
package org.rut.util.algorithm.support; ^q~.5c|  
j%0 g *YI  
import org.rut.util.algorithm.SortUtil; RG_)<U/B  
V> eJ  
/** E<_+Tc  
* @author treeroot !I8( Y  
* @since 2006-2-2 r,Pu-bhF  
* @version 1.0 _`94CC:  
*/ cW $~86u"C  
public class ImprovedQuickSort implements SortUtil.Sort { 9;c]_zt  
4gm(gY>[  
private static int MAX_STACK_SIZE=4096; iQaFR@  
private static int THRESHOLD=10; f1VA61z{)  
/* (non-Javadoc) 20uR?/|@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *r3u=oWb  
*/ -aMwC5iR@  
public void sort(int[] data) { K[|d7e  
int[] stack=new int[MAX_STACK_SIZE]; M#>f:_`<  
M8lR#2n|  
int top=-1; fm% Y*<Y"  
int pivot; Y)4D$9:  
int pivotIndex,l,r; ~oBSf+N  
KWV{wW=-  
stack[++top]=0; [[u&=.Au  
stack[++top]=data.length-1; 8<ri"m,  
Ib4 8`  
while(top>0){ $VJ=A<  
int j=stack[top--]; >^Z!  
int i=stack[top--]; ph1veD<ZZ  
? Kn~fs8  
pivotIndex=(i+j)/2; k}Vu!+cz  
pivot=data[pivotIndex]; Ol@ YSkd  
\+w -{"u$  
SortUtil.swap(data,pivotIndex,j); V/!8q`lYNJ  
]pA}h. R#-  
file://partition <<![3&p#  
l=i-1; ?G-a:'1!6  
r=j; {z%%(,I  
do{ kR-5RaW  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); =M9Od7\J  
SortUtil.swap(data,l,r); 'W j Q  
} .es= w=  
while(l SortUtil.swap(data,l,r); }F R yG%  
SortUtil.swap(data,l,j); WaWx5Fx+  
9X{aU)"omQ  
if((l-i)>THRESHOLD){ t UW'E  
stack[++top]=i; (iiyptJ  
stack[++top]=l-1; tL4xHa6v]  
} ^Sr`)vP  
if((j-l)>THRESHOLD){ 0)qLW& w  
stack[++top]=l+1; !$+J7\& 7p  
stack[++top]=j; dDk<J;~jGJ  
} Lp/]iZ@  
7QRtNYo#\  
} {ByT,92  
file://new InsertSort().sort(data); VL<)d-  
insertSort(data); IV:Knh+ ?  
} ji2if.t@  
/** *Mqg_} 0Y  
* @param data FyQ^@@  
*/ )P.|Xk:r  
private void insertSort(int[] data) { B|~\m ~  
int temp; Hp":r%)  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); NLF{W|X  
} |^@TA=_  
} o0Hh&:6!M  
} L+QEFQ:r5  
EY!aiH6P  
} 8DLMxG  
,k@fX oW  
归并排序: Nr7MSFiL  
p<6pmW3  
package org.rut.util.algorithm.support; z{^XU"yB  
1}!f.cWV(  
import org.rut.util.algorithm.SortUtil; =RUKN38  
F:M3^I  
/** hD l+  
* @author treeroot *Qg/W? "m  
* @since 2006-2-2 ]}G (@9  
* @version 1.0 }EO n=*  
*/ +;z4.C{gM  
public class MergeSort implements SortUtil.Sort{ 4aZsz,=  
37!}8  
/* (non-Javadoc) -]PW\}w1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +3t(kQ  
*/ Md_\9G .e  
public void sort(int[] data) { G(4:yK0  
int[] temp=new int[data.length]; Q_1EAxt  
mergeSort(data,temp,0,data.length-1); Vo(d)"m?  
} +]  |J  
8F4#E U  
private void mergeSort(int[] data,int[] temp,int l,int r){ nS'0i&<{1  
int mid=(l+r)/2; w];t]q|  
if(l==r) return ; iygdX2  
mergeSort(data,temp,l,mid); /sdkQ{J!.  
mergeSort(data,temp,mid+1,r); ,)Z^b$H]  
for(int i=l;i<=r;i++){ Mi 'eViH  
temp=data; .'7o,)pJ<  
} dmrM %a}W-  
int i1=l; #ZGWU_l}  
int i2=mid+1; y)#Ib*?  
for(int cur=l;cur<=r;cur++){ :d!.E$S  
if(i1==mid+1) E<&VK*{zcO  
data[cur]=temp[i2++]; ZT_EpT=1  
else if(i2>r) ?^IM2}(p  
data[cur]=temp[i1++]; g[@]OsX   
else if(temp[i1] data[cur]=temp[i1++]; Mk[_yqoCO  
else #\4uu  
data[cur]=temp[i2++];  NP^kbF  
} ;][1_  
} [?Aq#av  
~Cj+6CrT  
} _.FxqH>  
NRq jn; ,+  
改进后的归并排序: >&U]j*'4  
kS?!"zk>  
package org.rut.util.algorithm.support; Pd^ilRB  
wTIOCj  
import org.rut.util.algorithm.SortUtil; 0t*q5pAG".  
%wvSD&oz  
/** 0VsrAV0  
* @author treeroot l!q i:H<=1  
* @since 2006-2-2 "W:'cIw  
* @version 1.0 $o1G xz  
*/ bEy j8=P;  
public class ImprovedMergeSort implements SortUtil.Sort { <r 3F*S=  
S <|e/![@  
private static final int THRESHOLD = 10; 0-4WLMx  
]rHdG^0uss  
/* se$GE:hC1Q  
* (non-Javadoc) i':<Ro  
* <(@m913|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )BS./zD*[<  
*/ "2qp-'^[c  
public void sort(int[] data) { 3=5+NJ'8  
int[] temp=new int[data.length]; `<Zp!Hl(j  
mergeSort(data,temp,0,data.length-1); Y@^M U->+  
} S4`uNB#Ht  
q^goi 1  
private void mergeSort(int[] data, int[] temp, int l, int r) { ; >.>vLF  
int i, j, k; P",~8Aci(  
int mid = (l + r) / 2; M.!U;U<?  
if (l == r) kY4riZnm  
return; kV6T#RVob  
if ((mid - l) >= THRESHOLD) *]O[ZjyOY  
mergeSort(data, temp, l, mid); t~ Q {\!  
else ,p>=WX  
insertSort(data, l, mid - l + 1); CQzJ_aSJ (  
if ((r - mid) > THRESHOLD) sRb)*p'  
mergeSort(data, temp, mid + 1, r); (K>5DU  
else G4MNcy  
insertSort(data, mid + 1, r - mid); PS!f&IY}[.  
ShHm7+fV  
for (i = l; i <= mid; i++) { cq % =DZ  
temp = data; -~v;'zOO  
} 6#.z:_  
for (j = 1; j <= r - mid; j++) { e/F=5_Io  
temp[r - j + 1] = data[j + mid]; Q6kkMLh  
} nP4jOq*H  
int a = temp[l]; pz@_%IUS  
int b = temp[r];  g5X+iV  
for (i = l, j = r, k = l; k <= r; k++) { O\B_=KWDO  
if (a < b) { t#}/VnSQ  
data[k] = temp[i++]; &d9tR\}  
a = temp; p^7ZFUP  
} else { GZ UDI#  
data[k] = temp[j--]; +;pdG[N  
b = temp[j]; [|xHXcW  
} x:"_B  
} :kfl q  
} TQ.d|{B[  
?fc({zb  
/** ?7/n s>}  
* @param data ,H1j&]E!  
* @param l Zz,E4+'Rm  
* @param i yo") G!BN  
*/ D*DCMMp=0  
private void insertSort(int[] data, int start, int len) { !ZD[ $lt+  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n4qj"x Q  
} /)MzF6  
} =MRg  
} W!2(Ph*  
} 9]Uvy|  
Bj;Fy9[yb  
堆排序: AnfJyltS  
$^y6>@~  
package org.rut.util.algorithm.support; T Jp(  
QrHI}r  
import org.rut.util.algorithm.SortUtil; [F*t2 -ta  
{SbA(a?B  
/** y 7|x<Z  
* @author treeroot h$G&4_O  
* @since 2006-2-2 ~z^VMr  
* @version 1.0 2W~,,$ G  
*/ / \!hW-+]W  
public class HeapSort implements SortUtil.Sort{ ;Pnz4Y4|eU  
\NDSpT<Z  
/* (non-Javadoc) $j)Er.!9|R  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %f#3;tpC8  
*/ a7)q^;:O  
public void sort(int[] data) { kNMhMEez  
MaxHeap h=new MaxHeap(); A+69_?B TH  
h.init(data); G5Y 8]N  
for(int i=0;i h.remove(); r,A750P^  
System.arraycopy(h.queue,1,data,0,data.length); b-@6w(j  
} `)*   
x4pl#~Su  
private static class MaxHeap{ 's8NO Xlj  
H"tS33  
void init(int[] data){ 5qGRz"\p~  
this.queue=new int[data.length+1]; W> s@fN9  
for(int i=0;i queue[++size]=data; KtA0 8?B  
fixUp(size); w6'o<=  
} nMNAn}~*M  
} sF C&DTb?  
j,8*Z~\5  
private int size=0; /RT3 r  
Xl.h&x0? 8  
private int[] queue; @c,}\"(  
J@=1zL  
public int get() { KCGs*kp>  
return queue[1]; /iQ}DbtRb  
} &G@(f=  
'sn%+oN  
public void remove() { #U{^L{1Gx  
SortUtil.swap(queue,1,size--); 3o%JJIn&  
fixDown(1); 3x#=@i  
} VTa?y  
file://fixdown tYC`?HT  
private void fixDown(int k) { - (VV  
int j; `Yn^ -W  
while ((j = k << 1) <= size) { vHZw{'5y  
if (j < size %26amp;%26amp; queue[j] j++; K8$Hg:Ky-/  
if (queue[k]>queue[j]) file://不用交换 @sO*O4os>  
break; \5BI!<  
SortUtil.swap(queue,j,k); >&f .^p  
k = j; gEcVQPD@  
} (9CB&LZ(+E  
} '""qMRCm  
private void fixUp(int k) { .;u(uB;J6  
while (k > 1) { 43W>4fsc  
int j = k >> 1; R4"["T+L`  
if (queue[j]>queue[k])  (d |  
break; $h0]  
SortUtil.swap(queue,j,k); OY*BVJ^  
k = j;  L,!Z  
} a\$PqOB!  
} +[V[{n  
iNZ'qMH22  
} @tdX=\[~  
g^26Gb.  
} 4xuL{z;\  
!bFa\6]q  
SortUtil: h6}oRz9=g  
B!K{y>|.  
package org.rut.util.algorithm; N#Bg`:!  
s1<_=sfnT  
import org.rut.util.algorithm.support.BubbleSort; y%Ui)UMnw]  
import org.rut.util.algorithm.support.HeapSort; s03 DL  
import org.rut.util.algorithm.support.ImprovedMergeSort; 7uFM)b@.P  
import org.rut.util.algorithm.support.ImprovedQuickSort; RXkE"H{  
import org.rut.util.algorithm.support.InsertSort; [aU#"k)M  
import org.rut.util.algorithm.support.MergeSort; 8XD9fB^  
import org.rut.util.algorithm.support.QuickSort; Z'6 o$Xv  
import org.rut.util.algorithm.support.SelectionSort; >|KfO>  
import org.rut.util.algorithm.support.ShellSort; JAj<*TB.%  
[ -bL>8  
/** W1$B6+}Z0V  
* @author treeroot j_-$xz5-  
* @since 2006-2-2 - o$S=  
* @version 1.0 (k"|k  
*/ vQ^a7  
public class SortUtil { PorBB7iL  
public final static int INSERT = 1; &STgj|t_  
public final static int BUBBLE = 2; O?L _9L*  
public final static int SELECTION = 3; ' jR83A*  
public final static int SHELL = 4; XA5gosq  
public final static int QUICK = 5; EJO:3aKa  
public final static int IMPROVED_QUICK = 6; L,of@>  
public final static int MERGE = 7; P1]ucu_y,  
public final static int IMPROVED_MERGE = 8; -q[T0^e S  
public final static int HEAP = 9; F IDNhu  
_j-k*:  
public static void sort(int[] data) { >^ 0JlL`XG  
sort(data, IMPROVED_QUICK); c Bb!7?6(  
} fz31di9$  
private static String[] name={ 8)&yjY  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z7"8dlb  
}; #M&rmKv)g  
@g(N!n~  
private static Sort[] impl=new Sort[]{  HUr;ysw  
new InsertSort(), 64z9Yr@  
new BubbleSort(), 6* cm  
new SelectionSort(), /xJ,nwp7  
new ShellSort(), d*khda;Vj  
new QuickSort(), z[b,:G  
new ImprovedQuickSort(), %+|k>?&z7  
new MergeSort(), fu}NH \{  
new ImprovedMergeSort(), @riCR<fF  
new HeapSort() .*:SZ3v  
}; f/H rO6~k%  
?`_US7.@  
public static String toString(int algorithm){ + _rjA_  
return name[algorithm-1]; aj51%wKMb:  
} .%+'Ts#ie  
<.CO{L\e  
public static void sort(int[] data, int algorithm) { CTp~bGIv!=  
impl[algorithm-1].sort(data); N{46DS  
} ag]b]K  
e]!Vxn3  
public static interface Sort { %h=)>5-T  
public void sort(int[] data); kX zm  
}  g2L  
B]ul~FX  
public static void swap(int[] data, int i, int j) { H"WkZX  
int temp = data; fc._*y#AS  
data = data[j]; #`RY KQwB  
data[j] = temp; =xQ 7:TB  
} fs&J%ku\  
} A9qCaq{  
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