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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。 At<D36,^"  
插入排序: ;*(i}'  
6&* z  
package org.rut.util.algorithm.support; ]?S@g'Jd0Q  
A_8Xhem${  
import org.rut.util.algorithm.SortUtil; wF=?EK(;P{  
/** @tT2o@2Y^  
* @author treeroot f?JP=j  
* @since 2006-2-2 x&p.-Fi  
* @version 1.0 ]C'^&:&<  
*/ <S ae:m4  
public class InsertSort implements SortUtil.Sort{ Tfq7<<0$N  
+h ]~m_O  
/* (non-Javadoc) N =T 0Td  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kj53"eW  
*/ e@h (Zwp  
public void sort(int[] data) { h-.xx 4D  
int temp; "%(SLQOyy  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 9QP-~V{$  
} eQqnPqi-  
} v`r![QpYf  
} -#Bk  
"%I<yUP]U  
} ]A&pX AM  
k'8tqIUN]  
冒泡排序: lxsn(- j  
$sxRRe m{?  
package org.rut.util.algorithm.support; O2qy[]km  
kk>z,A4 h_  
import org.rut.util.algorithm.SortUtil; fK|P144   
2WK c;?  
/** +R8G*2  
* @author treeroot {nPiIPH  
* @since 2006-2-2 v\lKY*@f  
* @version 1.0 )TfX}  
*/ 70<{tjyc  
public class BubbleSort implements SortUtil.Sort{ , Dab(  
t i&!_  
/* (non-Javadoc) "T@9#7Obu  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'pnOHT  
*/ K+\2cf?bU  
public void sort(int[] data) { xs6kr  
int temp; eC3 ~|G_O  
for(int i=0;i for(int j=data.length-1;j>i;j--){ G\z5Ue*  
if(data[j] SortUtil.swap(data,j,j-1); 8kLHQ0pmu  
} Hp>_:2O8s  
} -K (>uV!?  
} <KX fh  
} }U'VVPh _  
kGmz1S}2  
} %At.nlss  
;e{e ?,[  
选择排序: BgT(~8'  
dsU'UG7L  
package org.rut.util.algorithm.support; o<gK"P  
fHODS9HQ  
import org.rut.util.algorithm.SortUtil; `mthzc3W  
wQ^RXbJI9  
/** $[g#P^  
* @author treeroot Te%V+l  
* @since 2006-2-2 F%f)oq`B  
* @version 1.0 _lDNYpv  
*/ m[CyvcF*u  
public class SelectionSort implements SortUtil.Sort { B.C:06E5  
d#HlO}  
/* !k Heslvi  
* (non-Javadoc) pAws{3(Q  
* Zi?:< H}  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2>[xe  
*/ &+0?Xip{Z  
public void sort(int[] data) { 8<x& Xd  
int temp; j&u/T  
for (int i = 0; i < data.length; i++) { m3~_uc/+D  
int lowIndex = i; O"X:3srJ`  
for (int j = data.length - 1; j > i; j--) { V.%LA. 8  
if (data[j] < data[lowIndex]) { fK _uuw4  
lowIndex = j; uPy5<c  
} _T_6Yl&cf)  
} 388vdF  
SortUtil.swap(data,i,lowIndex); AJ3%Z$JJ;s  
} ;t M  
} U[?f@.&  
$>7T s>8  
} j#Qnu0D  
^(s(4|  
Shell排序: Z~w2m6;s  
O!t=,F1j  
package org.rut.util.algorithm.support; S5kD|kJ  
lMl'+ yy  
import org.rut.util.algorithm.SortUtil; zGdYk-H3TH  
/'/i?9:  
/** 4jc?9(y%  
* @author treeroot nu)YN1 *  
* @since 2006-2-2 5Bt~tt  
* @version 1.0 $<9u:.9xf  
*/  |e<$  
public class ShellSort implements SortUtil.Sort{ 9 p,O>I  
T^F83Py<  
/* (non-Javadoc) S['cX ~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (*b<IGi;  
*/ I$R1#s  
public void sort(int[] data) { hQ}_(F_H  
for(int i=data.length/2;i>2;i/=2){ P4zwTEk`  
for(int j=0;j insertSort(data,j,i); ^f57qc3nF  
} [mQdc?n\  
} /~Bs5f.]?  
insertSort(data,0,1); MsZx 0]  
} $o0.oY#  
N/'8W9#6  
/** peHjKK  
* @param data ,!,tU7-H  
* @param j `kE7PXqa  
* @param i w+r).PS}C  
*/ KnKf8c  
private void insertSort(int[] data, int start, int inc) { }'?qUy3x  
int temp; 8A5/jqnqt  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); x4/{XRQ  
} 6Xz d> 5x  
} QT5pn5+ z  
} E[7E%^:Mg  
 q(X7e  
} WNZYs  
( et W4p  
快速排序: 6O,:I  
in5e *  
package org.rut.util.algorithm.support; p_ f<@WE  
'<xE 0<  
import org.rut.util.algorithm.SortUtil; yZ[=Y  
rHM^_sYRb  
/** zVa&4 T-  
* @author treeroot ,q>cFsY=i?  
* @since 2006-2-2 `GkCOx,  
* @version 1.0 fL# r@TB-s  
*/ YQ.ci4.f  
public class QuickSort implements SortUtil.Sort{ e(N},s:_  
BU4IN$d0Po  
/* (non-Javadoc) "GR*d{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vcsSi%M\U  
*/ "*t0 t  
public void sort(int[] data) { Mk0x#-F  
quickSort(data,0,data.length-1); :p,|6~b$  
} ya{`gjIlW  
private void quickSort(int[] data,int i,int j){ ;c>"gW8  
int pivotIndex=(i+j)/2; .k-6LR  
file://swap j RcE241  
SortUtil.swap(data,pivotIndex,j); kG{};Vm  
Y9|!= T%  
int k=partition(data,i-1,j,data[j]); 4'=Q:o*w`  
SortUtil.swap(data,k,j); gS'7:UH,  
if((k-i)>1) quickSort(data,i,k-1); >~Xe` }'  
if((j-k)>1) quickSort(data,k+1,j); wV iTMlq  
M.6uWwzQR  
} ?AD- n6  
/** 0j;ZPqEf3  
* @param data (# mvDz  
* @param i E N%{ $  
* @param j ;[UI ]?A%  
* @return e[?,'Mp9  
*/ :V5 Co!/+  
private int partition(int[] data, int l, int r,int pivot) { BWQ`8  
do{ Ws7fWK;  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); m[^ )Q9o}  
SortUtil.swap(data,l,r); u z7|!G!43  
} C0 KFN  
while(l SortUtil.swap(data,l,r); Lui6;NY  
return l; 1Ml<>  
} +uSp3gE"  
CQNMCYjg(R  
} iLIb-d?!a&  
vPGUE`!D+  
改进后的快速排序: ~nhO*bs}7{  
j~1K(=Ng  
package org.rut.util.algorithm.support; !yPy@eP~  
?P-O4  
import org.rut.util.algorithm.SortUtil; e"wz b< b  
<" nWGF4d  
/** `kxC# &HO  
* @author treeroot l?2  
* @since 2006-2-2 i+qg*o$  
* @version 1.0 =1dczJHV  
*/ wn?oHz*  
public class ImprovedQuickSort implements SortUtil.Sort { #O !2  
m~*qS4  
private static int MAX_STACK_SIZE=4096; ]Q ]y*  
private static int THRESHOLD=10;  @--"u_[  
/* (non-Javadoc) |'1.a jxw  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v@OELJX  
*/ 7Y[ q)lv  
public void sort(int[] data) { ]W$G!(3A  
int[] stack=new int[MAX_STACK_SIZE]; D4@?>ek6U  
Dk a8[z7  
int top=-1; N2U&TCc  
int pivot; 0?8>{!I  
int pivotIndex,l,r; _hyqHvP  
9#9bm  
stack[++top]=0; v0dzM/?*  
stack[++top]=data.length-1; qbsod  
>;1w-n  
while(top>0){ pP1DR'  
int j=stack[top--]; o-Dfud@  
int i=stack[top--]; <uv `)Q9  
fo+s+Q|Y  
pivotIndex=(i+j)/2; Y @'do)  
pivot=data[pivotIndex]; ]T'8O`  
 q/ Y4/  
SortUtil.swap(data,pivotIndex,j); c:Cw #  
s`H|o'0  
file://partition K=o {  
l=i-1; XJPIAN~l  
r=j; iB(?}SaAZ  
do{ &hkD"GGe  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); K"XwSZ/  
SortUtil.swap(data,l,r); T@.+bD  
} G gA:;f46  
while(l SortUtil.swap(data,l,r); X!LiekU!D  
SortUtil.swap(data,l,j); WN{8gL&y  
Z(c SM  
if((l-i)>THRESHOLD){ PdVx&BL*  
stack[++top]=i; SQ> Yf\  
stack[++top]=l-1; :t!J 9  
} Z(tJd ,  
if((j-l)>THRESHOLD){ :*,!gf  
stack[++top]=l+1; ^|.T \  
stack[++top]=j; )s^gT]"N  
} nVWU\$Ft  
=23B9WT   
} YT oG'#qs  
file://new InsertSort().sort(data); d*Su c  
insertSort(data); /nA>ox78  
} F/lL1nTdK  
/** CHv n8tk  
* @param data FT~c|ep.  
*/ M !"Q7>d  
private void insertSort(int[] data) { mfI[9G  
int temp; Bf00&PE;  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);  2=;ZJ  
} hfLe<,  
} sj&(O@~R  
} qXq#A&  
nbP}a?XC  
} :KvZP:T  
&$CyT6mb^  
归并排序: ~s4JGV~R  
6x(b/`VW  
package org.rut.util.algorithm.support; @q<h.#9  
!gLJBp  
import org.rut.util.algorithm.SortUtil; }0E@eL  
D[@- `F  
/** U&B(uk(2  
* @author treeroot P;25 F  
* @since 2006-2-2 hl**G4z9q  
* @version 1.0 GYIQ[#'d7  
*/ B^dMYFelJ  
public class MergeSort implements SortUtil.Sort{ xC _3&.  
N)E'k%?,  
/* (non-Javadoc) W%ix|R^2]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g~K-'Nw  
*/ bt=D<YZk  
public void sort(int[] data) { 8M!9gvcaO  
int[] temp=new int[data.length]; _?{KTgJG  
mergeSort(data,temp,0,data.length-1); /rD9)  
} bHSoQ \  
9<CUm"%J  
private void mergeSort(int[] data,int[] temp,int l,int r){ '!Va9m*w7  
int mid=(l+r)/2; B &Z0ZWx  
if(l==r) return ; =r]_$r%gR  
mergeSort(data,temp,l,mid); !K*3bY`#  
mergeSort(data,temp,mid+1,r); :jTbzDqQ  
for(int i=l;i<=r;i++){ 2ALYfZ|d  
temp=data; d:&cq8^  
} !?i9fYu  
int i1=l; 2xuU[  
int i2=mid+1; Y(rQ032s  
for(int cur=l;cur<=r;cur++){ (0 t{  
if(i1==mid+1) Dy. |bUB!f  
data[cur]=temp[i2++]; E"BW-<_!  
else if(i2>r) S?v;+3TG  
data[cur]=temp[i1++]; \J(~ Nv5!  
else if(temp[i1] data[cur]=temp[i1++];  nSo.,72  
else `ZC -lAY  
data[cur]=temp[i2++]; e jk?If 07  
} : LX!T&  
} o%]b\Vl6  
j y p.2c  
} DP*V|)  
Sb?v5  
改进后的归并排序: K~UT@,CS60  
?j!/ Hc/b4  
package org.rut.util.algorithm.support; !JDyv\i}  
I %1P:-  
import org.rut.util.algorithm.SortUtil; CD?b.Cxai  
6S%KUFB+e  
/**  :5^5l  
* @author treeroot H9VdoxKo  
* @since 2006-2-2 Tff eCaBv  
* @version 1.0 }/NL"0j+4  
*/ :8)3t! A  
public class ImprovedMergeSort implements SortUtil.Sort { u?g;fh6  
+)( "!@  
private static final int THRESHOLD = 10; Pa\yp?({q  
G7-.d/8|^  
/* W}(xE?9&  
* (non-Javadoc) "wV7PSbM  
* uZ1G,9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S|RUc}(  
*/ Jn0L_@  
public void sort(int[] data) { Tt0]G_  
int[] temp=new int[data.length]; SV2\vby}C  
mergeSort(data,temp,0,data.length-1); ~ebm,3?  
} czo*_q%  
V,tYqhQ3  
private void mergeSort(int[] data, int[] temp, int l, int r) { :VRQd}$Pi  
int i, j, k; Q;2k bVWY  
int mid = (l + r) / 2; 4%jSqT@  
if (l == r) v>Kv!OY:c  
return; %. IW H9P7  
if ((mid - l) >= THRESHOLD) |oOA;JC)(  
mergeSort(data, temp, l, mid); pi*?fUg!W  
else [DSzhi]  
insertSort(data, l, mid - l + 1); F JxH{N6a  
if ((r - mid) > THRESHOLD) .ddf'$6h  
mergeSort(data, temp, mid + 1, r); z{> )'A/  
else <e8Ux#x/  
insertSort(data, mid + 1, r - mid); =p!Hl#  
5&U?\YNLa  
for (i = l; i <= mid; i++) { 8`w#)6(V  
temp = data; l=&Va+K  
} 1NlpOVq:)  
for (j = 1; j <= r - mid; j++) { ^''3}<Ep  
temp[r - j + 1] = data[j + mid]; 60 p*4>^v  
} zZCssn;[  
int a = temp[l]; ? O e,  
int b = temp[r]; t+WUz#i"  
for (i = l, j = r, k = l; k <= r; k++) { 5@Xy) z  
if (a < b) { [ 3SbWwg  
data[k] = temp[i++]; ^MZ9Zu_  
a = temp; YQfQ[{kp  
} else { ( v=Z$#l  
data[k] = temp[j--]; |Tl2r,(+R  
b = temp[j]; 6x_D0j%^]  
} !Ie={BpzbZ  
} TbR Ee;1  
} 1,G f;mcQ  
FVH R  
/** 6$$ku  
* @param data :"oUnBY%  
* @param l T 3 +lYE  
* @param i pXxpEv  
*/ pB]+c%\  
private void insertSort(int[] data, int start, int len) { Je~Ybh  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]M9r<x*  
} ZEU/6.  
} %?:eURQ  
} =g^JJpS  
} {B6tGLt#bf  
`OyYo^+D|.  
堆排序: Rwz (20n\^  
Q(YQ$ i"S  
package org.rut.util.algorithm.support; 2Yd;#i)  
DKf:0E8  
import org.rut.util.algorithm.SortUtil; O>L 5 dP  
9"k^:}8.  
/** =dI2j@}c  
* @author treeroot 1|\/2  
* @since 2006-2-2 M6b6lhg  
* @version 1.0 )eSD5hOI)  
*/ 7(= 09z  
public class HeapSort implements SortUtil.Sort{ ?`D/#P  
XFN4m #  
/* (non-Javadoc) V\o& {7!  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0j|JyS:}G  
*/ @460r  
public void sort(int[] data) { IOOAaa @(  
MaxHeap h=new MaxHeap(); A4|a{\|$  
h.init(data); HOAgRhzE  
for(int i=0;i h.remove(); y]ZujfW7  
System.arraycopy(h.queue,1,data,0,data.length); .EoLJHL }  
} zz+[]G+"2m  
"@)9$-g  
private static class MaxHeap{ 3DO ^vV  
Bl)DuCV  
void init(int[] data){ }xM >F%  
this.queue=new int[data.length+1]; p8MPn>h<  
for(int i=0;i queue[++size]=data; @5\ns-%  
fixUp(size); |\~!o N  
} U*6)/.J  
} G+xdh  
4!KUPgg  
private int size=0; OmX(3>:9  
eyGY8fF8$  
private int[] queue; ]p2M!N,?  
,] ,dOIOwn  
public int get() { 9W <I~  
return queue[1]; >w"k:O17  
} CwVORf,uA  
42: 6=\  
public void remove() { ;4 ON  
SortUtil.swap(queue,1,size--); gNG_,+=!  
fixDown(1); =9JKg4I6  
} 5 J9,/M0  
file://fixdown )9 QeVf  
private void fixDown(int k) { k9<P]%  
int j; ]2P*Z6Az  
while ((j = k << 1) <= size) { L.@o  
if (j < size %26amp;%26amp; queue[j] j++; ,2YkQ/ >  
if (queue[k]>queue[j]) file://不用交换 KDX34Fr1  
break; \{ui{8+G  
SortUtil.swap(queue,j,k); nZ 0rxx[V?  
k = j; eD481r  
} L(2KC>GvA  
} %kJ_o*"  
private void fixUp(int k) { JW4~Qwx  
while (k > 1) { MdOQEWJ$|  
int j = k >> 1; 5L}qL?S`x|  
if (queue[j]>queue[k]) zLxO\R!d  
break; "NamP\hj  
SortUtil.swap(queue,j,k); hkq[xgX  
k = j; ZsPT!l,  
} t:G67^<3  
} !5P\5WF~Y  
_JjR= m  
} 'bXm,Ed  
_8CE|<Cn  
} m*MfGj(  
/ b_C9'S  
SortUtil: (hn@+hc  
6:(*u{  
package org.rut.util.algorithm; Iu`xe  
 S=o1k  
import org.rut.util.algorithm.support.BubbleSort; S6r$n  
import org.rut.util.algorithm.support.HeapSort; =hO0 @w  
import org.rut.util.algorithm.support.ImprovedMergeSort; HNRZ59Yyq  
import org.rut.util.algorithm.support.ImprovedQuickSort; X;I;CZ={  
import org.rut.util.algorithm.support.InsertSort; sacaL4[_<  
import org.rut.util.algorithm.support.MergeSort; n%>c4*t  
import org.rut.util.algorithm.support.QuickSort; (gv1f  
import org.rut.util.algorithm.support.SelectionSort; A@X&d y  
import org.rut.util.algorithm.support.ShellSort; .*N,x0 B(  
E  K)7g~  
/** VE<&0d<  
* @author treeroot m\88Etl@  
* @since 2006-2-2 o#-K,|-  
* @version 1.0 /^kZ}}9baU  
*/ .'q0*Pe  
public class SortUtil { 32r2<QrX  
public final static int INSERT = 1; >t,BNsWB  
public final static int BUBBLE = 2; EhkvC>y  
public final static int SELECTION = 3; h$Z_r($b  
public final static int SHELL = 4; PyD'lsV  
public final static int QUICK = 5; vPn(~d_  
public final static int IMPROVED_QUICK = 6; *.UM[Wo  
public final static int MERGE = 7; ,&;#$ b5  
public final static int IMPROVED_MERGE = 8; ?]'Rz\70  
public final static int HEAP = 9; $\|$ekil4  
p1 9j  
public static void sort(int[] data) { &!uN N|W  
sort(data, IMPROVED_QUICK); rTiW&#  
} 4|Dxyb>pS  
private static String[] name={ Z)6gh{B08  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J1^6p*]GX  
}; R)AFaP |  
Ub%al D  
private static Sort[] impl=new Sort[]{ cvR|qHNX  
new InsertSort(), P| o_/BS  
new BubbleSort(), Lzzf`jN]  
new SelectionSort(), ;hz"`{(JY  
new ShellSort(), <|_/i/H  
new QuickSort(), L {6y]t7^  
new ImprovedQuickSort(), z:hY{/-  
new MergeSort(), \>8"r,hG|  
new ImprovedMergeSort(), +1Ha,O k  
new HeapSort() li4rK <O  
}; Ng?n}$g*  
h\k!X/  
public static String toString(int algorithm){ GoI3hp(  
return name[algorithm-1]; `zNvZm-E  
} `c^ _5:euX  
$d4^e&s  
public static void sort(int[] data, int algorithm) { uP\?y(= "  
impl[algorithm-1].sort(data); }b-"[TDEF  
} w`(EW>i  
FnN@W^/z  
public static interface Sort { 85rXm*Df  
public void sort(int[] data); qNP&f 8fH  
} &D "$N"  
@'.(62v  
public static void swap(int[] data, int i, int j) { B{wx"mK  
int temp = data; Iz/o|o]#  
data = data[j]; 8}3dwr;-  
data[j] = temp; c7mIwMhl~  
} c}a.  
} 3%?01$k  
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