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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。 y;1l].L  
插入排序: ,+hH|$  
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package org.rut.util.algorithm.support; V Mb r@9  
G~fM!F0   
import org.rut.util.algorithm.SortUtil; uIb,n5  
/** M qG`P  
* @author treeroot c037#&Q%#  
* @since 2006-2-2 )%D>U  
* @version 1.0 |)WN%#v  
*/ XLxr@1   
public class InsertSort implements SortUtil.Sort{ ~T'Ri=  
WPu{ ]<pl  
/* (non-Javadoc) KOHYeiry~A  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U f <hzP  
*/ {B,r  
public void sort(int[] data) { ]v,>!~8r  
int temp; }vspjplk^  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); %jnSJjcq  
} csNB  \  
} [K4wd%+  
} afNqK~  
8dY Pn+`  
} w\QMA3  
y1@*)| r  
冒泡排序: Vp~c$y+  
OPP^n-iPr  
package org.rut.util.algorithm.support; $bd2TVNV:  
[/iT D=O,  
import org.rut.util.algorithm.SortUtil; ~qj09  
@.SuHd  
/** 1w/Ur'8we  
* @author treeroot ne (zGJd  
* @since 2006-2-2 hEv}g  
* @version 1.0 \n`)>-  
*/ AQ` `Dp  
public class BubbleSort implements SortUtil.Sort{ jDwLzvM O  
^qP}/H[QT  
/* (non-Javadoc) 32KL~32Y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4<{]_S6"0y  
*/ i9 Tq h  
public void sort(int[] data) { W`2Xn?g  
int temp; Y&JK*d  
for(int i=0;i for(int j=data.length-1;j>i;j--){ V.U9Q{y"  
if(data[j] SortUtil.swap(data,j,j-1); rjLPX  
} ;%_s4  
} F:B 8J4/  
} P/hV{@x  
} @fz!]/  
qPI1\!z6  
} {Z^  G]@  
[;n/|/m,  
选择排序: r(Vz(  
(yB)rBh>n  
package org.rut.util.algorithm.support; xG|T_|?  
_I1:|y  
import org.rut.util.algorithm.SortUtil; A;\1`_i0  
quGv q"Y>  
/** 4' MmT'  
* @author treeroot -xk.wWpV  
* @since 2006-2-2 |1[3RnG S  
* @version 1.0 CW)JS3}W"  
*/ ?!Bf# "TY  
public class SelectionSort implements SortUtil.Sort { 6+s10?  
]:X# w0UR  
/* <*'%Xgm  
* (non-Javadoc) $wBF'|eU  
* *~>} *  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ub_!~tb}?  
*/ dr~6}S#  
public void sort(int[] data) { 9z0G0QW[  
int temp; 7u|X . X  
for (int i = 0; i < data.length; i++) { ooW;s<6  
int lowIndex = i; h]{V/  
for (int j = data.length - 1; j > i; j--) { O"6 (k{`  
if (data[j] < data[lowIndex]) { ZD(VH6<g%  
lowIndex = j; C ks;f6G  
} tW)K pX  
} ;)'@kzi  
SortUtil.swap(data,i,lowIndex); :U!@  
} B2/d%B  
} Q2(K+!Oe  
^/V>^9CZ  
} 6#SUfK;  
E@(nKe&6T_  
Shell排序: Jdc{H/10  
NZW)$c'  
package org.rut.util.algorithm.support; .%x%b6EI  
CNkI9>L=W`  
import org.rut.util.algorithm.SortUtil; (<ZpT%2  
KyQd6 1  
/** 4J9VdEKk  
* @author treeroot Q%*987i  
* @since 2006-2-2 d(X/N2~g  
* @version 1.0 #PJHwvr  
*/ "z6 xS;  
public class ShellSort implements SortUtil.Sort{ E'ay @YAp  
;if PqL kO  
/* (non-Javadoc) N R0"yJV>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C^^AN~ZD  
*/ r\."=l  
public void sort(int[] data) { LjEG1$F>  
for(int i=data.length/2;i>2;i/=2){ , R;k>'.  
for(int j=0;j insertSort(data,j,i); FJCLK#-  
} :I !}ZD+Z  
} [0M`uf/u  
insertSort(data,0,1); !-cK@>.pE  
} GVK c4HGt  
 n)t'?7  
/** C4H$w:bVk  
* @param data D<wz%*  
* @param j FD[o94`%  
* @param i "pInb5F  
*/ lh`ZEvt  
private void insertSort(int[] data, int start, int inc) { nQaryL  
int temp; ZR8%h<  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); q*'-G]tH=  
} \~BYY|UB;W  
} 8W"Xdv{  
} \WPy9kRU  
gCL?{oVU  
} S\dG>F>S  
ya'Ma<4  
快速排序: B"Hz)-MW  
F(DM$5z[  
package org.rut.util.algorithm.support; ]]eI80u[  
;BmPP,  
import org.rut.util.algorithm.SortUtil; \`oP\|Z  
s/\<;g:u^  
/** Q u_=K_W  
* @author treeroot m8Y>4:Nw  
* @since 2006-2-2 G vTA/zA  
* @version 1.0 k@ So l6  
*/ ~o X`Gih  
public class QuickSort implements SortUtil.Sort{ U)6Ew4uRxV  
\ !qe@h<  
/* (non-Javadoc) S[5OTwa8L  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #DA,*  
*/ K +l-A>Ic  
public void sort(int[] data) { U9Gg#M4tY  
quickSort(data,0,data.length-1); vtw97G  
} CsX@u#  
private void quickSort(int[] data,int i,int j){ q${+I(b,  
int pivotIndex=(i+j)/2; u$rSM0CJ  
file://swap %{B4M#~  
SortUtil.swap(data,pivotIndex,j); >uP1k.z'I  
ufB9\yl{~  
int k=partition(data,i-1,j,data[j]); cMoBYk  
SortUtil.swap(data,k,j); W_bA.z T{  
if((k-i)>1) quickSort(data,i,k-1); = J0r,dR  
if((j-k)>1) quickSort(data,k+1,j); 2= )V"lR\  
q"-+`;^7(-  
} 4Dw| I${O  
/** orZwm9#].  
* @param data sp7#e%R\  
* @param i -#`tS  
* @param j ZfU &X{  
* @return _Rk>yJD7s  
*/ Ch'e'EmI  
private int partition(int[] data, int l, int r,int pivot) { ]vjMfT%]W  
do{ T?KM}<$(O  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); },%, v2}  
SortUtil.swap(data,l,r); V(=3K"j  
} $VJE&b  
while(l SortUtil.swap(data,l,r); "\O{!Hj8  
return l; \F9HsR6  
} 6 g)X&pZ  
<Q@{6  
} ?8ady% .ls  
H8A=]Gq  
改进后的快速排序: h3(B7n7  
us )NgG  
package org.rut.util.algorithm.support; $]~|W3\G  
FPkig`(3  
import org.rut.util.algorithm.SortUtil; ,GMuq_H  
49Hgq/uO  
/** A"wso[{  
* @author treeroot SN5Z@kK  
* @since 2006-2-2 rU_FRk  
* @version 1.0 RPZ -  
*/ q@d6P~[-gj  
public class ImprovedQuickSort implements SortUtil.Sort { GiKmB-HO  
l:(?|1_  
private static int MAX_STACK_SIZE=4096; F-<c.0;6  
private static int THRESHOLD=10; vpP8'f.  
/* (non-Javadoc) :auq#$B  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X<uH [  
*/ @#::C@V]  
public void sort(int[] data) { ^)1!TewCY  
int[] stack=new int[MAX_STACK_SIZE]; ?jn";:  
I@uin|X  
int top=-1; ,A9{x\1!  
int pivot; jTN!\RH9NF  
int pivotIndex,l,r; Z9UNp[  0  
eo<=Q|nI&  
stack[++top]=0; IRbZ ;*3dO  
stack[++top]=data.length-1; 7,ffY/  
x?2y^3<5  
while(top>0){ (P 9$Ei0fv  
int j=stack[top--]; TB#oauJm,  
int i=stack[top--]; 0c]3 ,#  
$Hal]  
pivotIndex=(i+j)/2; 24I~{Qy  
pivot=data[pivotIndex]; cpQhg-LY|  
18JAca8Zs  
SortUtil.swap(data,pivotIndex,j); r(Y@;  
k7=mxXF  
file://partition lt|UehJ F  
l=i-1; ePY69!pO5e  
r=j; 2KQpmNN  
do{ dUP8[y  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); RQW<Sp~  
SortUtil.swap(data,l,r); q&V=A[<rz  
} 2@f?yh0  
while(l SortUtil.swap(data,l,r); $jN,] N~  
SortUtil.swap(data,l,j); /;9]LC.g  
0[!38  
if((l-i)>THRESHOLD){ ZZU"Q7`^  
stack[++top]=i; ;op 8r u  
stack[++top]=l-1; gro@+^DmT  
} +$D~?sk  
if((j-l)>THRESHOLD){ f/]g@/`  
stack[++top]=l+1; +"D*0gYD  
stack[++top]=j; |^t8ct?x~  
} T0lbMp  
Q);^gV  
} /Avl&Rd  
file://new InsertSort().sort(data);  `AxhA.&V  
insertSort(data); :\,3=suWq  
} [(/IV+  
/** A!p70km2  
* @param data Y?V>%eBu  
*/ usOIbrQ  
private void insertSort(int[] data) { S<DS|qOo  
int temp; `KJ BQK  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); v1~`76^  
} v`9n'+h-c6  
} <rFKJ^B  
} r?wE;gH  
< c[dpK5c  
} M\jTeB"Z  
2Ls  
归并排序: 5:~BGK&{Y  
m'ykDK\B  
package org.rut.util.algorithm.support; c!=^C/5Ee  
&HYs^|ydrr  
import org.rut.util.algorithm.SortUtil; i>L>3]SRr{  
VD-2{em  
/** Wf:I 0  
* @author treeroot O)9{qU:[b  
* @since 2006-2-2 kV3Zt@+  
* @version 1.0 /WE1afe_R  
*/  B!+`km5  
public class MergeSort implements SortUtil.Sort{ 3bPF+(`J  
A+bU{oLr  
/* (non-Javadoc) <e7  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9|RR;k[  
*/ $.-\2;U  
public void sort(int[] data) { o;2QZ"v  
int[] temp=new int[data.length]; M}BqSzd*  
mergeSort(data,temp,0,data.length-1); \hFIg3  
} Oj^qh+r  
J,]U"+;H  
private void mergeSort(int[] data,int[] temp,int l,int r){ 5<KY}  
int mid=(l+r)/2; rg{|/ ;imT  
if(l==r) return ; |HMpVT-;j  
mergeSort(data,temp,l,mid); Z4@GcdZ  
mergeSort(data,temp,mid+1,r); $r87]y!  
for(int i=l;i<=r;i++){ E0a &1j  
temp=data; =)9@rV&~  
} 8^%Nl `_2B  
int i1=l; a5# B&|#q  
int i2=mid+1; U> s$}Y:+Z  
for(int cur=l;cur<=r;cur++){ $E]W U?U  
if(i1==mid+1) 7iBN!"G0  
data[cur]=temp[i2++]; h$~ \to$C  
else if(i2>r) ?\NWKp  
data[cur]=temp[i1++]; ]M5w!O!  
else if(temp[i1] data[cur]=temp[i1++]; o `N /w  
else &o$Pwk\p/  
data[cur]=temp[i2++]; &p#$}tm  
} 1C' _I  
} qg#|1J6e  
~kW[d1'c  
} V,qc[*_3  
CDTM<0`%  
改进后的归并排序: ]~1Xx:X-  
P\R#!+FgW8  
package org.rut.util.algorithm.support; amH..D7_>  
q:/<^|  
import org.rut.util.algorithm.SortUtil; D<d4"*qo  
O#962\  
/** y}t1r |p  
* @author treeroot hbg:}R=B<  
* @since 2006-2-2 &KS*rHgt?  
* @version 1.0 !+# pGSk  
*/ J"Z=`I)KON  
public class ImprovedMergeSort implements SortUtil.Sort { 5x:dhkW  
@fSBW+  
private static final int THRESHOLD = 10; &?xZ Hr`  
]1(G:h\  
/* -*T<^G;rK  
* (non-Javadoc) =xq+r]g6  
* O^,%V{]6\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M$0-!$RY  
*/ $06[D91'  
public void sort(int[] data) { %}=:gF  
int[] temp=new int[data.length]; _pS |bqF  
mergeSort(data,temp,0,data.length-1); <4|/AF*>  
} oX #WT  
8A ;)5!  
private void mergeSort(int[] data, int[] temp, int l, int r) { _`(WX;sK  
int i, j, k; K-CF5i:  
int mid = (l + r) / 2; hPB^|#}  
if (l == r) <//#0r*  
return; d1rIU6  
if ((mid - l) >= THRESHOLD) 7A mnxFC  
mergeSort(data, temp, l, mid); F$k^px  
else ?'$Yj>R6  
insertSort(data, l, mid - l + 1); ?' :v): J}  
if ((r - mid) > THRESHOLD) awic9 uMH  
mergeSort(data, temp, mid + 1, r); BQ7p<{G  
else H ]x-s  
insertSort(data, mid + 1, r - mid); /$ :w8  
)Z0bMO<  
for (i = l; i <= mid; i++) { *VPj BzcH  
temp = data; R@8pKCL.  
} dRD t.U!T  
for (j = 1; j <= r - mid; j++) { HDY2<Hzc  
temp[r - j + 1] = data[j + mid]; RU_wr<  
} 9_  
int a = temp[l]; / !@@  
int b = temp[r]; 9$[PA jwk  
for (i = l, j = r, k = l; k <= r; k++) { NM{/rvM  
if (a < b) { iUua!uC  
data[k] = temp[i++]; (Iz$_(  
a = temp; G (o9*m1  
} else { /eO :1c  
data[k] = temp[j--]; r$ 8 ^K\oF  
b = temp[j]; >{HQ"{Q  
} PV\aQO.mo  
} UTLuzm  
} 5u89?-UD  
P`xQL  
/** !|#W,9  
* @param data ?~p]Ey}~9  
* @param l c&GVIrJ  
* @param i P< 5v\\  
*/ `UK'IN.il  
private void insertSort(int[] data, int start, int len) { ]9P2v X   
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #@3& 1 }J/  
} ^.HvuG},O  
} OkV*,n  
} 3Hd~mfO\  
} &{uj3s&C   
ni gn" r  
堆排序: 45aUz@  
MoX~ZewWR  
package org.rut.util.algorithm.support; -+ha4JOB  
,ut-Di=6  
import org.rut.util.algorithm.SortUtil; ^tTASK  
Nr,Q u8  
/** cM hBOm*  
* @author treeroot E;tEmGf6F  
* @since 2006-2-2 y2{uEbA  
* @version 1.0 !jTtMx  
*/ [  ^S(SPL  
public class HeapSort implements SortUtil.Sort{ :2zga=)g  
)p^" J|  
/* (non-Javadoc) tg%#W `  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @/,:". SM  
*/ ouE/\4'NB  
public void sort(int[] data) { [Xyu_I-c  
MaxHeap h=new MaxHeap(); U5RLM_a@M  
h.init(data); >_J9D?3S  
for(int i=0;i h.remove(); SIridZ*%  
System.arraycopy(h.queue,1,data,0,data.length); n(h9I'V8)F  
} 90[6PSXk  
[2$mo;E?  
private static class MaxHeap{ ?`lD|~  
{)jTq??  
void init(int[] data){ 1 ]A$  
this.queue=new int[data.length+1]; {Z,_/@}N  
for(int i=0;i queue[++size]=data; .C*mDi)wZ  
fixUp(size); %;eD.If}  
} ,6EhtNDu  
} teKx^ 'c'  
*671MJ 9  
private int size=0; , UsY0YC  
i$5<>\g  
private int[] queue; OU esL9  
{ MV,>T_  
public int get() { ?Qxf~,F  
return queue[1]; 1.tAl6]  
} vvI23!H  
2Onp{,'}  
public void remove() { :o 8XG  
SortUtil.swap(queue,1,size--); S54q?sb_  
fixDown(1); TtQ'I}7q  
} 2O 2HmL  
file://fixdown 21$E.x 6  
private void fixDown(int k) { ![i)_XO  
int j; p9>1a j2a  
while ((j = k << 1) <= size) { k5%W8dI  
if (j < size %26amp;%26amp; queue[j] j++; B[,AR"#b  
if (queue[k]>queue[j]) file://不用交换 BPuum  
break; \i'Z(1  
SortUtil.swap(queue,j,k); R*=88ds  
k = j; FS)"MDs  
} 'eo/"~/*w  
} ; ,}Dh/&E  
private void fixUp(int k) { Z%Fc -KVt  
while (k > 1) { 5%%e$o+  
int j = k >> 1; 3_ly"\I\  
if (queue[j]>queue[k]) "ze-Mb  
break; } J[Z)u  
SortUtil.swap(queue,j,k); 4_`(c1oA  
k = j; 1Q/= s,{u  
} /go|r '  
} 6CCm1F{`  
AP1&TQ,&  
} rQxiG[0  
H76iBJ66  
} s IFE:/1,  
g<N;31:c\  
SortUtil: ^) (-7H  
B<Q)z5KK  
package org.rut.util.algorithm; 0NeIQr1N_  
?I[*{}@n"  
import org.rut.util.algorithm.support.BubbleSort; ", p5}}/  
import org.rut.util.algorithm.support.HeapSort; 0|Xz-Y  
import org.rut.util.algorithm.support.ImprovedMergeSort;  W,|+Dl  
import org.rut.util.algorithm.support.ImprovedQuickSort; vc :%  
import org.rut.util.algorithm.support.InsertSort; /&c2O X|Z  
import org.rut.util.algorithm.support.MergeSort; g#MLA5%=u  
import org.rut.util.algorithm.support.QuickSort; Gp{,v  
import org.rut.util.algorithm.support.SelectionSort; p$t|eu  
import org.rut.util.algorithm.support.ShellSort; q;}iW:r&Q  
j4<K0-?  
/** Xhq7)/jp  
* @author treeroot NS65F7<&  
* @since 2006-2-2 P(3k1SM  
* @version 1.0 [#9i@40  
*/ WfD fj  
public class SortUtil { EV?U !O  
public final static int INSERT = 1; T](}jQxj`  
public final static int BUBBLE = 2; R G*Vdom  
public final static int SELECTION = 3; $AT@r"  
public final static int SHELL = 4; ^)wKS]BQ..  
public final static int QUICK = 5; zak|* _  
public final static int IMPROVED_QUICK = 6; a'-u(Bw  
public final static int MERGE = 7; d:k n%L6k_  
public final static int IMPROVED_MERGE = 8; ae2Q^yLA  
public final static int HEAP = 9; lYTQg~aPm  
X$;&Mdo.  
public static void sort(int[] data) { *s,[Uy![  
sort(data, IMPROVED_QUICK); zXM,cV/s   
} (6.uNLr  
private static String[] name={ _1NK9dp:  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'zM=[#!B  
}; LFI#wGhXVk  
l>MDCqV  
private static Sort[] impl=new Sort[]{ HhL;64OYa  
new InsertSort(), {#ynN`tLyF  
new BubbleSort(), cT(6>@9@  
new SelectionSort(), R{fJ"Q5'  
new ShellSort(), jQ,Vs=*H  
new QuickSort(), Kxch.$hc,  
new ImprovedQuickSort(), V"Z8-u  
new MergeSort(), g@37t @I  
new ImprovedMergeSort(), <|3%}?  
new HeapSort() P`ou:M{8  
}; . %s U)$bH  
=#/Kg_RKL  
public static String toString(int algorithm){ m`9nDiV  
return name[algorithm-1]; f4fBUZ^ A  
} f-G)pHm  
'L7qf'RV  
public static void sort(int[] data, int algorithm) { SIV !8mz  
impl[algorithm-1].sort(data); h~m,0nGO  
} .07`nIs"  
~N/r;omVc  
public static interface Sort { mUbm3JIjJ  
public void sort(int[] data); X%+lgm+  
} R!%nzL@e&`  
0_eqO'"  
public static void swap(int[] data, int i, int j) { mwo:+^v(  
int temp = data; !( rAI  
data = data[j]; QXZyiJX}  
data[j] = temp; `XhH{*Q"X  
} `Bw]PO  
} "bIb?e2h9G  
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