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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。 o;zU;pkB  
插入排序: }^@Q9<P^E  
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package org.rut.util.algorithm.support; IOjp'6Yr  
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import org.rut.util.algorithm.SortUtil; y$Rr,]L  
/** VPh0{(O^=  
* @author treeroot ;Eer  
* @since 2006-2-2 j^V r!y  
* @version 1.0 @X?7a]+;8  
*/ x/B1\U I  
public class InsertSort implements SortUtil.Sort{ UK7pQt}9  
p" ;5J+?(  
/* (non-Javadoc) S /kM#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4*D'zJsJ  
*/ r+D ?_Lk  
public void sort(int[] data) { <Pm!#)-g9  
int temp; b:M1P&R  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); <y}9Twdy  
} j v4O  
} QH d^?H*  
} F+m%PVW:  
2YbI."ob  
} D"z3SLFW{  
O)jpnNz  
冒泡排序: R[ #vFQ  
+I$,Y~&`>  
package org.rut.util.algorithm.support; /F thT  
Xv&&U@7  
import org.rut.util.algorithm.SortUtil; GGQ%/i]:  
%6%~`((4  
/** )/y7Fh  
* @author treeroot 3 i;sB  
* @since 2006-2-2 y v58~w*"  
* @version 1.0 mM$|cge"  
*/ ^5D%)@~  
public class BubbleSort implements SortUtil.Sort{ @7? O#WmL  
Xt .ca,`U  
/* (non-Javadoc) _ g8CvH)?!  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E-`3}"{  
*/ ++=f7y u  
public void sort(int[] data) { vmj'X>Q  
int temp; li37*  
for(int i=0;i for(int j=data.length-1;j>i;j--){ s?5vJ:M Xr  
if(data[j] SortUtil.swap(data,j,j-1); mp:xR^5c  
} Ct<]('Hm(  
} Im g$D*BM  
}  Nt w?~%  
} z|$M,?r'  
WR<?_X_  
} ?]AF? 0/  
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选择排序: GyZpdp!  
.}c&" L;W  
package org.rut.util.algorithm.support; &Yklf?EZ>Q  
i< b-$9  
import org.rut.util.algorithm.SortUtil; Q;xJ/4 Z"  
L[cP2X]NQ  
/** K0usBA  
* @author treeroot )4e8LO  
* @since 2006-2-2 B6yTD7  
* @version 1.0 {6tj$&\)  
*/ WbWEgd%8.  
public class SelectionSort implements SortUtil.Sort { }WV}in0  
^ 7SE2Zi  
/* T! ww3d  
* (non-Javadoc) >\o._?xSA  
* Ab In\,x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kj>!&W57  
*/ sW,JnR  
public void sort(int[] data) { i,B<k 0W9  
int temp; dJjkH6%}  
for (int i = 0; i < data.length; i++) { M-8`zA2  
int lowIndex = i; #I"s{*  
for (int j = data.length - 1; j > i; j--) { _M) G  
if (data[j] < data[lowIndex]) { jcbq#  
lowIndex = j; F;L8FL-  
} 'N3)>!Y:8  
} Fy$f`w_H@  
SortUtil.swap(data,i,lowIndex); 2 oo/KndU  
} `tPVNO,l  
} (2Z k fN  
[Qqomm.[\w  
} 6E-AfY'<  
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Shell排序: 3c=>;g  
.]e_je_  
package org.rut.util.algorithm.support; )`BKEa f  
kW7$Gw]-  
import org.rut.util.algorithm.SortUtil; 4:9N]1JCb  
mIZ6[ ?  
/** 1{A K=H')  
* @author treeroot jx{wOb~oO)  
* @since 2006-2-2 z*UgRLKZD  
* @version 1.0 !pZ<{|cH  
*/ D&{CC  
public class ShellSort implements SortUtil.Sort{ q5G`q&O5  
{e5DQ21.  
/* (non-Javadoc) iax0V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bd\%K`JQ{  
*/ s1]m^,  
public void sort(int[] data) { G}Ko*:fWS  
for(int i=data.length/2;i>2;i/=2){ ?C`r3  
for(int j=0;j insertSort(data,j,i); *XOLuPL>6)  
} X;1yQ |su  
} Ms#rvn!J  
insertSort(data,0,1); suS[P?4  
} @THa[|(S  
LS$zA>:  
/** +s;>@j()V  
* @param data k<|}&<h  
* @param j 9:*[Q"v  
* @param i q B IekQT  
*/ \n`/?\r.z  
private void insertSort(int[] data, int start, int inc) { PthgxB^  
int temp; 4.p:$/GTS  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); D94bq_2}  
} BwkY;Ur/AL  
} K)9Rw2-AJ  
} JOz4O  
?rjB9AC_;t  
} JW!.+ Q  
\(RD5@=!4#  
快速排序: +n<W#O %  
"x vizvR  
package org.rut.util.algorithm.support; U:z5`z!  
]q~bi<E9W  
import org.rut.util.algorithm.SortUtil; n@L@pgo%~  
U\u07^h[  
/**  T  5F)  
* @author treeroot %fnG v\uI  
* @since 2006-2-2 Y1ks'=c>  
* @version 1.0 SpImd IpD  
*/ j9rxu$N+  
public class QuickSort implements SortUtil.Sort{ ;80^ GDk~S  
! B92W  
/* (non-Javadoc) OD9z7*E@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !,dp/5 V  
*/ XF+4*),  
public void sort(int[] data) { I(Z\$  
quickSort(data,0,data.length-1); zu.B>INe  
} Wb>;L@jB7  
private void quickSort(int[] data,int i,int j){ 1_b*j-j  
int pivotIndex=(i+j)/2; :}yT?LIyP  
file://swap Af\  
SortUtil.swap(data,pivotIndex,j); Vm[F~2+HX  
*NG\3%}%|@  
int k=partition(data,i-1,j,data[j]); b50mMW tG  
SortUtil.swap(data,k,j); xKl1DIN[  
if((k-i)>1) quickSort(data,i,k-1); /z_]7]  
if((j-k)>1) quickSort(data,k+1,j); 'zbvg0T  
E#\Oe_eq~N  
} BN `2UVH  
/** :G6aO  
* @param data r^a:s]  
* @param i T-#4hY`  
* @param j `/Rqt+C  
* @return , /%'""`w  
*/ <=V{tl  
private int partition(int[] data, int l, int r,int pivot) { `KN>0R2k  
do{ O5aXa_A_u  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); @gfW*PNjlP  
SortUtil.swap(data,l,r); lKB9n}P  
} l^d'8n  
while(l SortUtil.swap(data,l,r); >[Wjzg  
return l; 0k{\W  
} =@0J:"c  
YVwpqOE.=  
} Xl<iR]lda  
 |iI dm  
改进后的快速排序: 3C<G8*4);/  
BM/o7%]n  
package org.rut.util.algorithm.support; l=b!O  
!\<a2>4$T  
import org.rut.util.algorithm.SortUtil; <gFa@at  
vc&v+5Y  
/** pY@QR?F\  
* @author treeroot !6 L!%Oi  
* @since 2006-2-2 Pmo<t6  
* @version 1.0 #G.eiqh$a  
*/ &92/qRh7  
public class ImprovedQuickSort implements SortUtil.Sort { +]nIr'V  
MqB@}!  
private static int MAX_STACK_SIZE=4096; +C8O"  
private static int THRESHOLD=10; ZMb+sUK  
/* (non-Javadoc) Y+ UJV6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q"ZpT  
*/ l'/`2Y1  
public void sort(int[] data) { *V%"q|L8  
int[] stack=new int[MAX_STACK_SIZE]; K6t"98  
vX\9#Hj  
int top=-1; rHTZM,zM=H  
int pivot; !8[T*'LJ-  
int pivotIndex,l,r; c )LG+K  
`hZh}K^  
stack[++top]=0; 9xO@_pkX  
stack[++top]=data.length-1; K^U ="  
A1INaL  
while(top>0){ = V2Rq(jH  
int j=stack[top--]; DH yv^  
int i=stack[top--]; 2t9UJu4  
$Yt|XT+!&  
pivotIndex=(i+j)/2; hAAh  
pivot=data[pivotIndex]; CYLab5A  
N.vWZ7l8  
SortUtil.swap(data,pivotIndex,j); 953qz]Q8  
vI I{i  
file://partition U8 Zb&6  
l=i-1; g ns}%\,  
r=j; Rey+3*zUb  
do{ `z\hQ%1!F  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); .s9E +1  
SortUtil.swap(data,l,r); A{ ~D_q  
} B`Z3e%g#  
while(l SortUtil.swap(data,l,r); 0#9H;j<Op  
SortUtil.swap(data,l,j); wKLYyetM!  
e{@RBYX@+c  
if((l-i)>THRESHOLD){ J`U]Ux/L  
stack[++top]=i; !:!(=(4$P  
stack[++top]=l-1; pE&G]ZC  
} 7h}gIm7e"  
if((j-l)>THRESHOLD){ >) u;X  
stack[++top]=l+1; D{6 y^@/  
stack[++top]=j; ?"mZb#%  
} K2zln_W  
PPB/-F]rr  
} (s,&,I=@  
file://new InsertSort().sort(data); KU,SAcfR7  
insertSort(data); c$ !?4z_.  
} Qc3d<{7\~  
/** 7K\v=  
* @param data bRxI7 '  
*/ Ze~P6  
private void insertSort(int[] data) { z3uR1vF'  
int temp; S-S%IdL  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); TQT3]h6  
} bO\++zOF  
} ^x\VMd3*w  
} pPBXUu'  
|CDM(g>%  
} V|MHDMD=  
p>7qyZ8  
归并排序: E+lR&~mK=  
&SE}5ddC7  
package org.rut.util.algorithm.support; EwzR4,r\M  
KVa{;zBwl  
import org.rut.util.algorithm.SortUtil; ,Q-,#C"  
l&ueD& *4&  
/** N.JR($N$  
* @author treeroot ?>h ~"D#  
* @since 2006-2-2 ;DuVb2~+  
* @version 1.0 '#f<wf n  
*/ 'z. GAR  
public class MergeSort implements SortUtil.Sort{ ^~H{I_Y  
|reA`&<q  
/* (non-Javadoc) !FL"L 9   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;#85 _/  
*/ 9r].rzf9  
public void sort(int[] data) { R'k `0  
int[] temp=new int[data.length]; >J7slDRo  
mergeSort(data,temp,0,data.length-1); =7<JD}G  
} /y G34) aB  
=HCEUB9Fs  
private void mergeSort(int[] data,int[] temp,int l,int r){ -i`jS_-Cv-  
int mid=(l+r)/2; +& B?f  
if(l==r) return ; .t_t)'L  
mergeSort(data,temp,l,mid); teJt.VA7)  
mergeSort(data,temp,mid+1,r); 7\6g>4J^`  
for(int i=l;i<=r;i++){ jsN[Drra  
temp=data; T)\}V#iA*  
} N:<$]x>  
int i1=l; '5BD%#[  
int i2=mid+1; 3J#LxYK  
for(int cur=l;cur<=r;cur++){ i<"lXu  
if(i1==mid+1) 1,wcf,  
data[cur]=temp[i2++]; ddfGR/1X  
else if(i2>r) @ b!]Jw  
data[cur]=temp[i1++]; .yj@hpJM  
else if(temp[i1] data[cur]=temp[i1++]; @ wR3L:@  
else *6/IO&y1a  
data[cur]=temp[i2++]; ab2FK  
} ]bY|>q  
} GOc   
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} Zk=,`sBC  
iwK.*07+  
改进后的归并排序: duG3-E  
l r&7 qu  
package org.rut.util.algorithm.support; qPQIcJ  
lp *GJP]T  
import org.rut.util.algorithm.SortUtil; qdix@ @  
c<_%KL&R  
/** CVfV    
* @author treeroot e34>q:#5l  
* @since 2006-2-2 :0r,.)  
* @version 1.0 zKd@Ab  
*/ sUG!dwqqd  
public class ImprovedMergeSort implements SortUtil.Sort { 3(WijtH  
+HS]kFH  
private static final int THRESHOLD = 10; eN=jWUoCh  
{XOl &  
/* i1B!oZ3q  
* (non-Javadoc) |`LH|6/  
* j$)ogGu  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sLr47 NC  
*/ Ek L2nI  
public void sort(int[] data) { u_k[< &$  
int[] temp=new int[data.length]; iJzBd7  
mergeSort(data,temp,0,data.length-1); WWunS|B!  
} ab6I*DbF  
[J,.?'V  
private void mergeSort(int[] data, int[] temp, int l, int r) { no*)M7  
int i, j, k; ~&<#H+O  
int mid = (l + r) / 2; 4CM'I~  
if (l == r) >&(#p@#  
return; )pHtsd.eP  
if ((mid - l) >= THRESHOLD) 1{a%V$S[  
mergeSort(data, temp, l, mid); 4qid+ [B  
else Wlc&QOfF  
insertSort(data, l, mid - l + 1); <w9~T TS  
if ((r - mid) > THRESHOLD) cXb*d|-|N  
mergeSort(data, temp, mid + 1, r); o !tC{"g  
else K?uZIDo  
insertSort(data, mid + 1, r - mid); +x2JC' -H  
CYaN;HV@_  
for (i = l; i <= mid; i++) { 7X>IS#W]  
temp = data; "/'3I/}  
} (7R?T}  
for (j = 1; j <= r - mid; j++) { y#GHmHeh  
temp[r - j + 1] = data[j + mid]; Cy;UyZ  
} q}LDFsU  
int a = temp[l];  lbHgxZ  
int b = temp[r]; dbby.%  
for (i = l, j = r, k = l; k <= r; k++) { T-] {gc  
if (a < b) { ? Lg(,-:  
data[k] = temp[i++]; KwL_ae6fV  
a = temp; :F:1(FDP  
} else { h1_Z&VJ  
data[k] = temp[j--]; *z~,|DQ(A  
b = temp[j]; Cab.a)o  
} \BnU ?z  
} :c/54Ss~  
} uBlPwb,V  
 (Q8!5s  
/** jYp!?%!  
* @param data ?%6oM  
* @param l 4zyQ"?A~  
* @param i 1iF=~@Nz_  
*/ Pe _O(  
private void insertSort(int[] data, int start, int len) { "V p nr +6  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9B0ON*`  
} .!o]oM U/  
} N68mvBe  
} ng%[yY  
} p>tkRA?lk  
ray3gM%JLj  
堆排序: -#ZLu.  
*`H*@2  
package org.rut.util.algorithm.support; pAy4%|(  
=z'(FP5!0  
import org.rut.util.algorithm.SortUtil; c""&He4zp  
mh3S?Uc  
/** \bARp z?a  
* @author treeroot jrQ0-D%M d  
* @since 2006-2-2 FOk&z!xYKd  
* @version 1.0 Z}S[fN8  
*/ #^T`vTD-  
public class HeapSort implements SortUtil.Sort{ z=>fBb>w7  
d,^O[9UWo  
/* (non-Javadoc) !UoA6C:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c>LP}PGk  
*/ &>\;4E.O5  
public void sort(int[] data) { *V2;ds.~  
MaxHeap h=new MaxHeap(); l2Sar1~1  
h.init(data); +?*;#=q  
for(int i=0;i h.remove(); 'ZF6Z9  
System.arraycopy(h.queue,1,data,0,data.length); LzU'6ah';5  
} !y d B,S  
ce;7  
private static class MaxHeap{ M/W"M9u  
o|@0.H|  
void init(int[] data){ =o 9s?vOJ  
this.queue=new int[data.length+1]; s;vt2>;q+e  
for(int i=0;i queue[++size]=data; 7p1Y g  
fixUp(size); u}%OC43  
} aGbG@c8PRi  
} 5SY%B#;5G  
bWo  
private int size=0; M_E,pg=rWI  
3'z$@ ;Ev+  
private int[] queue; 7ui<2(W@0  
7fR5V  
public int get() { HA0!>_I dC  
return queue[1]; :Qge1/  
} FOG{dio  
x$d[Ovw-  
public void remove() { h?xgOb!4  
SortUtil.swap(queue,1,size--); ({E,}x  
fixDown(1); u !BU^@P  
} }k }=e  
file://fixdown 6BV 6<PHJ  
private void fixDown(int k) { g4Z Uh@b~  
int j; #|sE]\bsH  
while ((j = k << 1) <= size) { Lp&nO  
if (j < size %26amp;%26amp; queue[j] j++; =2 HY]H  
if (queue[k]>queue[j]) file://不用交换 j#//U2VdN  
break; A]bQUWt2  
SortUtil.swap(queue,j,k); zQ=b|p]|W  
k = j; z/J?!ee  
} ;U'\"N9  
} 3= =["hO  
private void fixUp(int k) { ,!{8@*!=s  
while (k > 1) { =p;cJ%#2]'  
int j = k >> 1; d_`MS@2  
if (queue[j]>queue[k]) rnK]3Ust  
break; Wr[LC&  
SortUtil.swap(queue,j,k); -YQh F;/  
k = j; 77M!2S_E  
} WHE<E rV%  
} NMkP#s7.y  
Ir JSU_  
} S>dHBR#AD  
V48_aL  
} ? $/::uo  
qArR5OJ  
SortUtil: g kmof^  
U;bx^2<m  
package org.rut.util.algorithm; N*A*\B%{x'  
Iy_5k8 ]  
import org.rut.util.algorithm.support.BubbleSort; AZ!/{1Az  
import org.rut.util.algorithm.support.HeapSort; AW r2Bv  
import org.rut.util.algorithm.support.ImprovedMergeSort; _#K|g#p5  
import org.rut.util.algorithm.support.ImprovedQuickSort; "bej#'M#  
import org.rut.util.algorithm.support.InsertSort; .JKH=?~\  
import org.rut.util.algorithm.support.MergeSort; C|]c#X2t3  
import org.rut.util.algorithm.support.QuickSort; XNa{_3v  
import org.rut.util.algorithm.support.SelectionSort; }[eUAGhDU  
import org.rut.util.algorithm.support.ShellSort; oZ2:%  
9y7hJib  
/** t`6]eRR  
* @author treeroot gxO~44"  
* @since 2006-2-2 %X_A#9  
* @version 1.0 tpS gbGzp  
*/ !mK()#6  
public class SortUtil { QDxs+<#  
public final static int INSERT = 1; a?W5~?\9  
public final static int BUBBLE = 2; "7sv@I_j  
public final static int SELECTION = 3; Qy9_tvq X  
public final static int SHELL = 4;  wp~}1]g  
public final static int QUICK = 5; N-l`U(Z~P  
public final static int IMPROVED_QUICK = 6; L$Z!  
public final static int MERGE = 7; \Hb!<mrp  
public final static int IMPROVED_MERGE = 8; w#1BHx  
public final static int HEAP = 9; +\+j/sa  
#eYYu2ND  
public static void sort(int[] data) { v^eAQoFLhN  
sort(data, IMPROVED_QUICK); ir'<H<t2  
} /[ m7~B]QE  
private static String[] name={ 5%D`y|  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0-PT%R  
}; &</)k|.A6\  
h HHR]e5:  
private static Sort[] impl=new Sort[]{ RV@B[:  
new InsertSort(), 'R1C-U3w,  
new BubbleSort(), O=}w1]  
new SelectionSort(), !9gpuS[  
new ShellSort(), ->qRGUW  
new QuickSort(), w5q6c%VZ  
new ImprovedQuickSort(), `/1rZ#  
new MergeSort(), Jb{g{a/  
new ImprovedMergeSort(), P [aE3Felk  
new HeapSort() 2L^/\!V#  
}; e| C2/U-  
)Fd)YJVR  
public static String toString(int algorithm){ jA8Bmwt;w  
return name[algorithm-1]; {31X  
} tY#&_%W  
s]yZ<uA  
public static void sort(int[] data, int algorithm) { &2:WezDF  
impl[algorithm-1].sort(data); /E/6(c  
} "viZ"/ ~6  
f`vWCb  
public static interface Sort { KdiJ'K.  
public void sort(int[] data); yo5-x"ze  
} /slCK4vFc  
*#p}FB2H#  
public static void swap(int[] data, int i, int j) { %>nAPO+e  
int temp = data;  k=t{o  
data = data[j]; "@ZwDg`  
data[j] = temp; s'/_0  
} V#599-  
} ^Gbcs l~Gj  
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