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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。 ")l_>y ?  
插入排序: LL~bq(b  
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package org.rut.util.algorithm.support; 3pSkk  
K-$gTV  
import org.rut.util.algorithm.SortUtil; _,h hO  
/** l vuoVINEp  
* @author treeroot *"N756Cj  
* @since 2006-2-2 qTA@0fL  
* @version 1.0 M(,npW  
*/ 8ODrW!o  
public class InsertSort implements SortUtil.Sort{ Fe(qf>E  
I' URPj:t  
/* (non-Javadoc) qDqgU  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GS^U6Xef  
*/ [.}-nAN  
public void sort(int[] data) { :Mss"L820  
int temp; ^O cM)Z6h  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ';buS -|6  
} Z 8??+d=  
} LTsG  
} +tz^ &(  
V$Y5EX  
} hJ0)"OA5  
?)9mHo^  
冒泡排序: rC>')`uk  
>$]SYF29  
package org.rut.util.algorithm.support; #D"fCVIS  
jiPV ]aVN  
import org.rut.util.algorithm.SortUtil; UE4zmIq  
$=8?@My<  
/** \2!v~&S  
* @author treeroot V~y4mpfX  
* @since 2006-2-2 .7-Yu1{2  
* @version 1.0 fu/v1Nhm  
*/ j|f$:j  
public class BubbleSort implements SortUtil.Sort{ s9 '*Vm  
gIR{!'  
/* (non-Javadoc) 6a G/=fq  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :%Dw3IrOM  
*/ h<oQ9zW)  
public void sort(int[] data) { U!sv6=(y@  
int temp; ".z~c%'  
for(int i=0;i for(int j=data.length-1;j>i;j--){ DiF=<} >x  
if(data[j] SortUtil.swap(data,j,j-1); ,4 ftQJ  
} /#?lG`'1  
} Z7&Bn  
} /IM5#M5~  
} P%5h!Z2m  
b'Gn)1NE  
} 7kM_Ijd$  
9 |Iq&S  
选择排序: /ey[cm2#[s  
JcxhI]E  
package org.rut.util.algorithm.support; |y@TI  
8o~<\eF%  
import org.rut.util.algorithm.SortUtil; -b-Pvw4  
jcF/5u5e  
/** T`46\KkN  
* @author treeroot VIL #q  
* @since 2006-2-2 2~+Iu +  
* @version 1.0 i*j[j~2>C;  
*/ &*Eyw s  
public class SelectionSort implements SortUtil.Sort { }et^'BkA(  
|MvCEp  
/* k3se<NL[  
* (non-Javadoc) 6C>x,kU  
* DUiqt09`~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OL*EY:]  
*/ Ow=`tv$l  
public void sort(int[] data) { 5:SfPAx  
int temp; 6Gjr8  
for (int i = 0; i < data.length; i++) { +vfk+6  
int lowIndex = i; $H^hK0?'  
for (int j = data.length - 1; j > i; j--) { d|5u<f5  
if (data[j] < data[lowIndex]) { +u*WUw! %  
lowIndex = j; , %X~/V  
}  L's_lC  
} Gk2\B]{  
SortUtil.swap(data,i,lowIndex); UT$G?D";M  
} RLr;]j8cm  
} 0o[p<<c*  
JI5?, )-St  
} 6R5) &L  
3/o-\wWO  
Shell排序: 2#5SI  
<pRb#G"  
package org.rut.util.algorithm.support; @Y*ONnl  
l"!.aIY"e  
import org.rut.util.algorithm.SortUtil; 5SFeJBS  
+](^gaDw<L  
/** oUR'gc :  
* @author treeroot T>d-f=(9KH  
* @since 2006-2-2 E N%cjvE  
* @version 1.0 9)s=%dL  
*/ o6K\z+.{  
public class ShellSort implements SortUtil.Sort{ -gH1`*YL  
| "DQ^)3Pi  
/* (non-Javadoc) +LV~%?W  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~j",ePl  
*/ ?AX./LI  
public void sort(int[] data) { L~SM#?z:ue  
for(int i=data.length/2;i>2;i/=2){ SfQ ,uD6  
for(int j=0;j insertSort(data,j,i); ?n>h/[/  
} K[PIw}V$?:  
} 828E^Q"<  
insertSort(data,0,1); "CBe$b4  
} +j&4[;8P:  
>V@-tT"^:  
/** "'-f?kZ  
* @param data $`x4|a8-  
* @param j yb56nd  
* @param i a_w# ,^/P  
*/ bcC ;i~9  
private void insertSort(int[] data, int start, int inc) { K+TRt"W8&s  
int temp; mu04TPj  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); X a#`VDh  
} DY'D]*'7$  
} 8-UlbO6  
} ^tIs57!  
i]a0 "  
} <H`&Zqqk  
SaMg)s~B  
快速排序: 6pM[.:TM   
a,x-akZWf  
package org.rut.util.algorithm.support; BV"7Wp;  
W'eF | hu  
import org.rut.util.algorithm.SortUtil; rePJ4i [y  
q3TAWNzI0  
/** 03L+[F&"?  
* @author treeroot &]3_ .C  
* @since 2006-2-2 Z0s}65BR  
* @version 1.0 1[OCojo<  
*/ C|bnUN  
public class QuickSort implements SortUtil.Sort{ [KMW *pA7  
<SGO+1zt p  
/* (non-Javadoc) .;)7)%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pSvRyb.K  
*/  0eUK'   
public void sort(int[] data) { S\b[Bq  
quickSort(data,0,data.length-1); 8+5# FC7  
} '!^5GSP3&  
private void quickSort(int[] data,int i,int j){ pyYm<dn  
int pivotIndex=(i+j)/2; / E}L%OvE  
file://swap s9+Rq*Qd  
SortUtil.swap(data,pivotIndex,j); bYQvh/(J  
T1 >xw4uo  
int k=partition(data,i-1,j,data[j]); ej,j1iB  
SortUtil.swap(data,k,j); smaPZ^;; j  
if((k-i)>1) quickSort(data,i,k-1); 1Kszpt(Ld  
if((j-k)>1) quickSort(data,k+1,j); >uT,Z,7O  
Cl#PYB{1Y  
} `,a6su (?  
/** +A%|.;  
* @param data mrWPTCD{  
* @param i s)C5u;3!  
* @param j [Z9 lxZ|  
* @return m_YXTwwx  
*/ qg1s]c~0u  
private int partition(int[] data, int l, int r,int pivot) { d1]CN6 7{G  
do{ :0N} K}  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); )N$T&  
SortUtil.swap(data,l,r); 9/2VU< K  
} !Q[j;f   
while(l SortUtil.swap(data,l,r); j"=F\S&!  
return l; EMy>X  
} 9#(Nd, m})  
fk%W0 7x!  
} "[h9hoN  
r+ v?~m!  
改进后的快速排序: A1>fNilC9  
rSu+zS7`X  
package org.rut.util.algorithm.support; ]90BIJ]*c  
zI-]K,!  
import org.rut.util.algorithm.SortUtil; >^Rkk {cc  
m8[XA!,  
/** Q$,AQyBlqc  
* @author treeroot JR6r3W  
* @since 2006-2-2 rfo7\'yk  
* @version 1.0 o6bT.{8\  
*/ %lsRj)n  
public class ImprovedQuickSort implements SortUtil.Sort { _43'W{%  
|WP}y- Au  
private static int MAX_STACK_SIZE=4096; Ymvd3>_  
private static int THRESHOLD=10; B^;"<2b*  
/* (non-Javadoc) SG$V%z"e  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  'ug:ic  
*/ lKdd3W"o  
public void sort(int[] data) { i,V,0{$  
int[] stack=new int[MAX_STACK_SIZE]; {,NF'x4$  
'`s+e#rs4{  
int top=-1; >U\1*F,Om,  
int pivot; S:(YZ%#  
int pivotIndex,l,r; Am ~P$dN  
HPryq )z  
stack[++top]=0; /SW*y@R2l  
stack[++top]=data.length-1; }INj~d<:  
0u) m9eg  
while(top>0){ Xb<>AzEM  
int j=stack[top--]; Z ".Xroq~  
int i=stack[top--]; U9"(jl/o  
[s{ B vn  
pivotIndex=(i+j)/2; 'MgYSP<  
pivot=data[pivotIndex]; xlcL;e&^P  
+'|nsIx,  
SortUtil.swap(data,pivotIndex,j); b#nI#!p'  
;Zm-B]\  
file://partition : X}n[K  
l=i-1; $GR rTC!  
r=j; m'zve%G  
do{ JIiS/]KQ  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); F|jl=i  
SortUtil.swap(data,l,r); =Y-.=}jp;  
} NkV81?  
while(l SortUtil.swap(data,l,r); 72CHyl`|l  
SortUtil.swap(data,l,j); s0O]vDTR,H  
xtBu]I)%  
if((l-i)>THRESHOLD){ {'p < o$(S  
stack[++top]=i; @O`T|7v  
stack[++top]=l-1; {/j gB"9  
} 7`j%5%q  
if((j-l)>THRESHOLD){ &,P; 7R  
stack[++top]=l+1; Q=6 1.lP6  
stack[++top]=j; bcq&yL'D  
} 7B<,nKd  
Lf)JO|o  
} jddhX]>I  
file://new InsertSort().sort(data); w4fQ~rcUIc  
insertSort(data); ?b:Pl{?  
} ;F|#m,2Q-  
/** ?fN6_x2e3  
* @param data zO2=o5nF.  
*/ 182g6/,  
private void insertSort(int[] data) { 3G[|4v?[<_  
int temp; Z3yy(D>*  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); "IB36/9  
} ^mg:<_p  
} ^J&D)&"j  
} }N} Js*  
oI!"F=?&6  
} sv!zY= 6  
E~#G_opQA  
归并排序: YKz#,  
\WBO(,]V  
package org.rut.util.algorithm.support; {sf ,(.W  
gD51N()s,  
import org.rut.util.algorithm.SortUtil; 41]a{A7q  
#IZ.px  
/** 7H09\g&  
* @author treeroot &XV9_{Hm  
* @since 2006-2-2 F b?^+V]9  
* @version 1.0 $OG){'X  
*/ g^Hf^%3xP  
public class MergeSort implements SortUtil.Sort{ ]tXIe?>9  
%Z4*;VwQ  
/* (non-Javadoc) X4 ] miUmh  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8 R%<~fq r  
*/ qFK.ULgP`  
public void sort(int[] data) { up+0-!AH  
int[] temp=new int[data.length]; 1)^\R(l  
mergeSort(data,temp,0,data.length-1); 2 F>Y{3&  
} "{r8'qn  
.;Mb4"7=  
private void mergeSort(int[] data,int[] temp,int l,int r){ SzIzQR93&  
int mid=(l+r)/2; $cK}Tl q  
if(l==r) return ; g<(!>:h  
mergeSort(data,temp,l,mid); &ocuZ -5`  
mergeSort(data,temp,mid+1,r);  [Q{\Ik  
for(int i=l;i<=r;i++){ ZM})l9_o"  
temp=data; JH{/0x#+  
} *1Bq>h:  
int i1=l; Dm{Xd+Y  
int i2=mid+1; f*<Vq:N=\  
for(int cur=l;cur<=r;cur++){  {ibu 0  
if(i1==mid+1) g=[OH  
data[cur]=temp[i2++]; rbnAC*y8'L  
else if(i2>r) :P}3cl_  
data[cur]=temp[i1++]; CDM6o!ur3  
else if(temp[i1] data[cur]=temp[i1++]; kBhjqI*  
else m=sEB8P  
data[cur]=temp[i2++]; ?[d4HKs  
} l>K+4  
} &muBSQ-  
[:{ FR2*x  
} PkrVQH9^w  
$/s"It  
改进后的归并排序: |dLr #+'az  
:-}K:ucaj  
package org.rut.util.algorithm.support; /^AH/,p  
O\.^H/  
import org.rut.util.algorithm.SortUtil; zI4rAsysL  
TL2E|@k1]  
/** ?VNtT/  
* @author treeroot RbL?(  
* @since 2006-2-2 yf9"Rc~+  
* @version 1.0 9 Gd6/2  
*/ Cu8mNB{H  
public class ImprovedMergeSort implements SortUtil.Sort { YK)m6zW5  
uVUU1@  
private static final int THRESHOLD = 10; a*y9@RC}  
-y-}g[`  
/* >O?WRC B  
* (non-Javadoc) fgd2jr 3T  
* 04-_ K  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EL`|>/[J  
*/ [*^.$s(  
public void sort(int[] data) { aO(PVS|P  
int[] temp=new int[data.length]; ~D9Cu>d9  
mergeSort(data,temp,0,data.length-1); \W .CHSD  
} `.MZ,Xhqi"  
t`z"=S  
private void mergeSort(int[] data, int[] temp, int l, int r) { qR'FbI  
int i, j, k; Uw("+[5O0  
int mid = (l + r) / 2; -5b|nQuY  
if (l == r) \Ip)Lm0  
return; vW=-RTRH  
if ((mid - l) >= THRESHOLD) p-}X=O$  
mergeSort(data, temp, l, mid); {!|4JquE_  
else eL SzGbKf  
insertSort(data, l, mid - l + 1); _/LGGt4&%  
if ((r - mid) > THRESHOLD) R xMsP;be  
mergeSort(data, temp, mid + 1, r); `f>!/Zm%9  
else J =^IS\m  
insertSort(data, mid + 1, r - mid); 309 pl  
b]]8Vs)'  
for (i = l; i <= mid; i++) { pJ] Ix *M  
temp = data; 0SL{J*S4[#  
} 1Z}5ykM3  
for (j = 1; j <= r - mid; j++) { :/T\E\Qr  
temp[r - j + 1] = data[j + mid]; BTkx}KK  
} vN{@c(=g  
int a = temp[l]; Eb ILAJ  
int b = temp[r]; C#U(POA  
for (i = l, j = r, k = l; k <= r; k++) { zl1*GVg  
if (a < b) { yiZtG#6K{  
data[k] = temp[i++]; &'z_:Wm  
a = temp; R])Eg&  
} else { ,R[$S"]!SH  
data[k] = temp[j--]; I`0-q?l  
b = temp[j]; :oIBJ u%/  
} `*8}q!.  
} [ \_o_W  
} OBAO(Ke  
eq6O6-  
/** 0#]fEi  
* @param data MLWHO$C~T  
* @param l }93kHO{  
* @param i {fXkbMO|  
*/ x4^nT=?6_  
private void insertSort(int[] data, int start, int len) { [Fr](&Tx  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XG/xMz~  
} O@Aazc5K  
} !J7`frv"(  
} c|?(>  
} B#V""[Y9  
rt+4-WuK>  
堆排序: K3!3[dR*  
R0-0  
package org.rut.util.algorithm.support; ;\RV C 7  
U?0|2hR~  
import org.rut.util.algorithm.SortUtil; P~\rP6 ;  
cI2Ps3~"Q  
/** *O_fw 0jV  
* @author treeroot 8 1Kf X {|  
* @since 2006-2-2 uuY^Q;^I*  
* @version 1.0 S8#0Vo$)a  
*/ d1D f`  
public class HeapSort implements SortUtil.Sort{ g Q\.|'%  
q}@L"a`  
/* (non-Javadoc) v?`R8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W>pe-  
*/ eft=k}  
public void sort(int[] data) { c-$rB_t+  
MaxHeap h=new MaxHeap(); Xw4Eti._D  
h.init(data); Orq/38:4G  
for(int i=0;i h.remove(); X?_rD'3  
System.arraycopy(h.queue,1,data,0,data.length); CPJ<A,V  
} 1ubu~6  
s 4`-mIa  
private static class MaxHeap{ ^OY$ W  
iE'_x$i  
void init(int[] data){ ]KFh 1  
this.queue=new int[data.length+1]; /!Rva"  
for(int i=0;i queue[++size]=data; 3WwS+6R  
fixUp(size); Z[@ i/. I  
} [piK"N  
} a OmG,+o  
1n`[D&?q  
private int size=0; f+:iz'b#U  
L2VwW  
private int[] queue; :qo[@x{  
Z 8w\[AF{$  
public int get() { p\[!=ZXFr\  
return queue[1]; (pELd(*Ga  
} &;$uU  
2* g2UP  
public void remove() { gN/!w:  
SortUtil.swap(queue,1,size--); 1| sem(t  
fixDown(1); K28L(4)  
} $oW= N   
file://fixdown qJ;~ANwt  
private void fixDown(int k) { I "x'  
int j; ]O|>nTa  
while ((j = k << 1) <= size) { }%XB*pzQ  
if (j < size %26amp;%26amp; queue[j] j++; +`F(wk["m  
if (queue[k]>queue[j]) file://不用交换 phDIUhL$z  
break; ' #K@%P  
SortUtil.swap(queue,j,k); ^y>V-R/N  
k = j; `he# !"  
} KF7w{A){  
} Qy:yz  
private void fixUp(int k) { l4RqQ+[KA;  
while (k > 1) { -)-: rRx-  
int j = k >> 1; $PM r)U  
if (queue[j]>queue[k]) s~,!E  
break; Apu- 9|oP  
SortUtil.swap(queue,j,k); 1XN%&VR>^D  
k = j; i7dDklj4  
} Uv59 XF$  
} N~|f^#L  
7}xQ4M\u$  
} Z*Ffdh>*:&  
7Ydqg&  
} S[y'{;  
VY/r2o#  
SortUtil: |e8A)xM]wC  
0faf4LzU!  
package org.rut.util.algorithm; moM'RO,M  
K14.!m  
import org.rut.util.algorithm.support.BubbleSort; l4kqz.Z-g  
import org.rut.util.algorithm.support.HeapSort; ,U9j7E<4  
import org.rut.util.algorithm.support.ImprovedMergeSort; 6%EpF;T`  
import org.rut.util.algorithm.support.ImprovedQuickSort; azmeJpC  
import org.rut.util.algorithm.support.InsertSort; ydD:6bBX  
import org.rut.util.algorithm.support.MergeSort; ]9 @4P$I  
import org.rut.util.algorithm.support.QuickSort; Rs<S}oeLn  
import org.rut.util.algorithm.support.SelectionSort; qo9&e~Y<G  
import org.rut.util.algorithm.support.ShellSort; 9@t&jznt<  
8+!G /p  
/** e[k\VYj[  
* @author treeroot J*g<]P&p0  
* @since 2006-2-2 O#tmB?n*  
* @version 1.0 tln}jpCw  
*/ <c@dE  
public class SortUtil { h(2{+Y+  
public final static int INSERT = 1; Gad&3M0r  
public final static int BUBBLE = 2; []\-*{^r  
public final static int SELECTION = 3; ]UO zz1   
public final static int SHELL = 4; MeD/)T{G~  
public final static int QUICK = 5; ft8  
public final static int IMPROVED_QUICK = 6; '!X`X=  
public final static int MERGE = 7; pz2E+o  
public final static int IMPROVED_MERGE = 8; }Bh\N 5G%  
public final static int HEAP = 9; '1!%yKc0  
S%p,.0_  
public static void sort(int[] data) { =2Ju)!%wr  
sort(data, IMPROVED_QUICK); -X EK[  
} 34k(:]56|  
private static String[] name={ :qXREF@h  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /_<_X 7  
}; W*H%\Y:N  
6jr}l  
private static Sort[] impl=new Sort[]{ O0^Y1l  
new InsertSort(), 1|*%  
new BubbleSort(),  t":^:i'M  
new SelectionSort(), 3 } $9./+  
new ShellSort(), M|{KQ3q:9  
new QuickSort(), TbMlYf]It  
new ImprovedQuickSort(), +SV!QMIg  
new MergeSort(), :^7_E&  
new ImprovedMergeSort(),  K0*er  
new HeapSort() 6mZpyt  
}; 2QHu8mFU  
a"O9;&}; &  
public static String toString(int algorithm){ #;2mP6a[  
return name[algorithm-1]; :@~3wD[y  
} _uh@fRyh  
@zR_[s  
public static void sort(int[] data, int algorithm) { };(2 na  
impl[algorithm-1].sort(data); o) eW5s,6  
} .Xta;Py|J  
cCtd\/ \  
public static interface Sort {  qzD  
public void sort(int[] data); K(mzt[n(  
} C/"Wh=h6  
ORo +]9)Yv  
public static void swap(int[] data, int i, int j) { -% B)+yq>  
int temp = data; k<*1mS8  
data = data[j]; ,J*#Ixe}  
data[j] = temp; <Dnv=)Rq  
} #z}IW(u<  
} c_?!V  
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