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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。 `R,g_{M j  
插入排序: E{xcu9  
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package org.rut.util.algorithm.support; :bu]gj4e  
><H*T{ Pg  
import org.rut.util.algorithm.SortUtil; UflS`  
/** .?)gn]#  
* @author treeroot Wph@LRB]  
* @since 2006-2-2 mH /9J  
* @version 1.0 Z^O_7I<5E  
*/ WFG`-8_e[I  
public class InsertSort implements SortUtil.Sort{ (X~JTH:e/  
z65Q"A  
/* (non-Javadoc) UHFI4{Wz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D ] G=sYt  
*/ cc{^0JT  
public void sort(int[] data) { BMYvxSsm  
int temp; kR65{h"gZT  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); FS7@6I2Ts  
} oP_}C[  
} MP$9W)  
} ?C(3TKH  
uc]`^,`2/  
} \JbOT%1  
~ ^*;#[<  
冒泡排序: nj6|WJ  
.^V9XN{'a  
package org.rut.util.algorithm.support; R_2T"  
>$G'=N:=X&  
import org.rut.util.algorithm.SortUtil; xL$7bw5fY  
c|<E~_ .w@  
/** Ft 6{g JBG  
* @author treeroot D2]i*gs  
* @since 2006-2-2 SYwB #|  
* @version 1.0 GL'l "L  
*/ Z~v-@  
public class BubbleSort implements SortUtil.Sort{ jW;g{5X  
~TYpq;rq  
/* (non-Javadoc) PgdHH:v)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0F9p'_C  
*/ 4~~G i`XE  
public void sort(int[] data) { 1Uk Gjw1J  
int temp; bDjm:G  
for(int i=0;i for(int j=data.length-1;j>i;j--){ CqR^w(  
if(data[j] SortUtil.swap(data,j,j-1); L)X[$:  
} 7~!F3WT{  
} v/x~L$[  
} R3hyz~\x&  
} <g1=jG:7k  
&n~v;M  
} /&+*X)#v  
8 t`lRWJ  
选择排序: 7& 'p"hF  
8 DPn5E#M1  
package org.rut.util.algorithm.support; HwZ"l31  
1C+d&U  
import org.rut.util.algorithm.SortUtil; Z7dyPR  
U# U*^#  
/** OCEhwB0  
* @author treeroot U?=-V8#M|  
* @since 2006-2-2 ;VS$xnZ  
* @version 1.0 +d=w%r)  
*/ [Zne19/  
public class SelectionSort implements SortUtil.Sort { k\Z7Dg$\D  
:%>TM/E N  
/* ~_a$5Y  
* (non-Javadoc) cf,^7,-`"  
* #:s*Hy=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dU&hM<.|  
*/ X=jHH=</  
public void sort(int[] data) { 7x#."6>Dy  
int temp; i,!tu  
for (int i = 0; i < data.length; i++) { 11?d,6Jl  
int lowIndex = i; #oJ%i+V  
for (int j = data.length - 1; j > i; j--) { T\w{&3ONm  
if (data[j] < data[lowIndex]) { }6!m Q  
lowIndex = j; om2)Cd9~7  
} tL]T_]z  
} d~#:t~ $,  
SortUtil.swap(data,i,lowIndex); ;k (M4?  
} A,4Z{f83  
} -+y3~^EYm,  
`J %35  
} AmB*4p5b  
7gE/g`"#  
Shell排序: c7A]\1 ~  
3jjV bm  
package org.rut.util.algorithm.support; y'C  
.4[M7)  
import org.rut.util.algorithm.SortUtil; D[dI_|59a  
[F+*e=wjN>  
/** o^W.53yX  
* @author treeroot ,j(S'Pw  
* @since 2006-2-2 jIck!  
* @version 1.0 Q!{,^Qb  
*/ ?*&5`Xh  
public class ShellSort implements SortUtil.Sort{ a+<{!+3v  
sp6A* mwl  
/* (non-Javadoc) EbnV"]1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _2X6c,  
*/ z@[-+Q:  
public void sort(int[] data) { X3m)  
for(int i=data.length/2;i>2;i/=2){ M\9+?  
for(int j=0;j insertSort(data,j,i); '?1g_C QsS  
} LoW}!,|  
} <Aqo[']  
insertSort(data,0,1); 4 {+47=n  
} x:+]^?}r  
(} wMU]!_  
/** Lum5Va%0  
* @param data ` 5SQ4  
* @param j HL%|DCo  
* @param i v;(k7  
*/ Bhk@0\a  
private void insertSort(int[] data, int start, int inc) { bMGXx>x  
int temp; yH0vESgv  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); t**MthnW  
} 5%"sv+iO  
} %ZX3:2  
} Ge1"+:tbJ  
6|QIzs<Z-X  
} KM/c^ a4V  
OlM3G^1e1  
快速排序: p8MN>pLP%  
WmuYHEU  
package org.rut.util.algorithm.support; 4VhKV JX  
QBjvbWoIG(  
import org.rut.util.algorithm.SortUtil; (Q"~bP{F  
>cH}sNHy  
/** vf-8DB  
* @author treeroot ]Xg7XY  
* @since 2006-2-2 Mp06A.j[  
* @version 1.0 Z6#(83G4  
*/ %[on.Q'1]2  
public class QuickSort implements SortUtil.Sort{ '#>(JN5\  
_Uhl4Mh  
/* (non-Javadoc) rC6@ ]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3cc;BWvM  
*/ !-4VGt&c,  
public void sort(int[] data) { ~0rvrDDg  
quickSort(data,0,data.length-1); 0(Hzh?t_  
} NXOcsdcZu  
private void quickSort(int[] data,int i,int j){ ;)z+dd#3  
int pivotIndex=(i+j)/2; JZ/T:Hsh4  
file://swap *fI\|%K  
SortUtil.swap(data,pivotIndex,j); M/kBAxNIC|  
T!-ly7-`  
int k=partition(data,i-1,j,data[j]); w[#*f?at~  
SortUtil.swap(data,k,j); f1 `E-  
if((k-i)>1) quickSort(data,i,k-1); Z<#h$XUA  
if((j-k)>1) quickSort(data,k+1,j); Lc0=5]D   
;Qidf}:  
} =lL)g"x X  
/** Tr, zV  
* @param data 3[<D"0#},  
* @param i 's$/-AV  
* @param j F!P,%Jm I<  
* @return 2:&L|;  
*/ xXCsJ9]  
private int partition(int[] data, int l, int r,int pivot) { d'[q2y?6N  
do{ z\>ZgRi~n  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Gm=e;X;r  
SortUtil.swap(data,l,r); ^M+aQg%  
} 0P;\ :-&p  
while(l SortUtil.swap(data,l,r); (?ZS 9&y}  
return l; Tj6kCB  
} Se>v|6  
h]&o)%{4  
} _7 ^:1i~:.  
p MR4]G  
改进后的快速排序: " :V@AT  
WTu!/J<\  
package org.rut.util.algorithm.support; dte-2?%~j  
lD$\t/8B  
import org.rut.util.algorithm.SortUtil; ,,G'Zur7  
s3=sl WY=  
/** -fOBM 4  
* @author treeroot @ X5#?  
* @since 2006-2-2 _z>%h>L|g  
* @version 1.0 )gV @6w  
*/ T1;>qgp4b  
public class ImprovedQuickSort implements SortUtil.Sort { u56F;y  
9]:F!d/  
private static int MAX_STACK_SIZE=4096; fvj  
private static int THRESHOLD=10; dg&GMo  
/* (non-Javadoc) dw%g9DT  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @#yl_r%  
*/ $Km~x  
public void sort(int[] data) { x M{SFF  
int[] stack=new int[MAX_STACK_SIZE]; 7{38g  
K;]Dh?  
int top=-1; )*&61  
int pivot; NG: f>R  
int pivotIndex,l,r; f/U~X;  
9r ](/"=f  
stack[++top]=0; 'rrnTd c  
stack[++top]=data.length-1; ysFp$!9Ux  
VP*B<u  
while(top>0){ kNX8y--  
int j=stack[top--]; b^"mQ   
int i=stack[top--]; 9Dd`x7$ a  
g|M>C:ZT  
pivotIndex=(i+j)/2; Tn?D~?a*O  
pivot=data[pivotIndex]; Z9i~>k  
e^v\K[  
SortUtil.swap(data,pivotIndex,j); cCcJOhk|d  
j9.%(*  
file://partition dw'P =8d  
l=i-1; \_7'f  
r=j; L;fz7?_j  
do{ =)J )xH!N  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); (/7cXd@\6  
SortUtil.swap(data,l,r); ?(M]'ia{  
} G> s qfYkK  
while(l SortUtil.swap(data,l,r); ,nJCqX~ /G  
SortUtil.swap(data,l,j); $g\p)- aU  
.2y @@g  
if((l-i)>THRESHOLD){ 9H2mA$2jnE  
stack[++top]=i; K6,d{n  
stack[++top]=l-1; !8tqYY?>@\  
} IiV]lxiE]  
if((j-l)>THRESHOLD){ QT4vjz+|  
stack[++top]=l+1; WLH ;{  
stack[++top]=j; &:~9'-O  
} B^.:dn  
.g_^! t  
} lYU?j|n  
file://new InsertSort().sort(data); df/7u}>9  
insertSort(data); 5kCXy$"%  
} nLR   
/** ~xcU6@/  
* @param data h<7@3Ur  
*/ ]'Gz~Z%>F  
private void insertSort(int[] data) { K{XE|g  
int temp; Mtn{63cK  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); [@NW  
} RY\ 0dv>  
}  {IT xHt  
} 4^!%>V"d/  
|#Q0UM|'Q  
} WA5.qw  
rj/nn)vv;  
归并排序: I0G[K~gb  
\)W Z D  
package org.rut.util.algorithm.support; zek>]l`!  
kJ)Z{hy  
import org.rut.util.algorithm.SortUtil; Ob]J!.  
CDT;AdRw7  
/** #<es>~0!  
* @author treeroot me90|GOx+  
* @since 2006-2-2 P.djR)YI  
* @version 1.0 JO~62='J  
*/ azG"Mt |7Z  
public class MergeSort implements SortUtil.Sort{ <slrzc_>&  
'@1C$0tx  
/* (non-Javadoc) /&l4 sF1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 34L1Gxf  
*/ .]N`]3$=  
public void sort(int[] data) { PB~ r7O]  
int[] temp=new int[data.length]; ak{XLzn  
mergeSort(data,temp,0,data.length-1); +5GPU 9k  
} ~DS.b-E  
v3wq-  
private void mergeSort(int[] data,int[] temp,int l,int r){ eKRE1DK  
int mid=(l+r)/2; biRkq c;  
if(l==r) return ; {gzVbZ#  
mergeSort(data,temp,l,mid); CW FE{  
mergeSort(data,temp,mid+1,r); XJ1Bl  
for(int i=l;i<=r;i++){ ,M$h3B\;r  
temp=data; FLIU}doc  
} Sx1OY0)s  
int i1=l; EIF  
int i2=mid+1; k h6n(B\  
for(int cur=l;cur<=r;cur++){ &,* ILz  
if(i1==mid+1) @0%[4  
data[cur]=temp[i2++]; *DQa6,b  
else if(i2>r) /)sP<WPQ 6  
data[cur]=temp[i1++]; xRZ/[1f!  
else if(temp[i1] data[cur]=temp[i1++];  hRqr  
else DeI3(o7  
data[cur]=temp[i2++]; u[nLrEnD  
} ^OK;swDW  
} 9zm2}6r4  
$y%IM`/w  
} [MF&x9Ss?%  
GtKSA#oYZB  
改进后的归并排序: D$VRE^k  
Sa/]81 aG  
package org.rut.util.algorithm.support; vVSf'w   
li0)<("/  
import org.rut.util.algorithm.SortUtil; tD,I7%|@  
n*9nzx#q  
/** 2I 7|hZ,  
* @author treeroot o3:BH@@  
* @since 2006-2-2 D5Z)"~'  
* @version 1.0 -op)X>  
*/ JW"n#sR4  
public class ImprovedMergeSort implements SortUtil.Sort { AuY*x;~  
h+Y>\Cxg  
private static final int THRESHOLD = 10; EXR6Vb,  
z`,dEGfh^  
/* j.c{%UYj  
* (non-Javadoc) x+v&3YF  
* `rV -,-r@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @h(Z;  
*/ bk]g}s  
public void sort(int[] data) { f/"IC;<~t>  
int[] temp=new int[data.length]; FytGg[#]  
mergeSort(data,temp,0,data.length-1); h~O^~"jc  
} WA.c.{w\  
cv. j  
private void mergeSort(int[] data, int[] temp, int l, int r) { m%c]+Our`  
int i, j, k; 5x!rT&!G  
int mid = (l + r) / 2; yh'*eli  
if (l == r) -J0I2D  
return; ^2i$AM1t  
if ((mid - l) >= THRESHOLD) 7cO1(yE#vr  
mergeSort(data, temp, l, mid); {7` 1m!R  
else g+Y &rz  
insertSort(data, l, mid - l + 1); a6?t?: ~|  
if ((r - mid) > THRESHOLD) { T<[-"h  
mergeSort(data, temp, mid + 1, r); {U4{v=,!I  
else @~FJlG(n  
insertSort(data, mid + 1, r - mid); R_"6E8N  
D`U,T& @  
for (i = l; i <= mid; i++) { qC q?`0&#  
temp = data; n*Hx"2XF  
} @VyF' ?}  
for (j = 1; j <= r - mid; j++) { QHd|cg  
temp[r - j + 1] = data[j + mid]; ,rOh*ebF  
} :d~mlyFI6P  
int a = temp[l]; uc LDl  
int b = temp[r]; \\{78WDA  
for (i = l, j = r, k = l; k <= r; k++) { %BQ?DTtb7'  
if (a < b) { W,:j >v g  
data[k] = temp[i++]; 09i7 7  
a = temp; Vddod  
} else { 8C*xrg#g:  
data[k] = temp[j--]; sXYXBX[  
b = temp[j]; 5C9 .h:c4y  
} "]q0|ZdOwH  
} z?GtC{L9  
} 'a$/ !~X  
|)mUO:*  
/** M0hR]4T  
* @param data g!i45]6[Nw  
* @param l Z% ]LZ/O8  
* @param i %}unlSTPP  
*/ }H/94]~tH  
private void insertSort(int[] data, int start, int len) { e0IGx]5i  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QBA{*@ A-  
} iz+,,UH  
} }4Q3S1|U  
} X@/X65=[  
} ,V)hV@Dk  
w9Nk8OsL  
堆排序: &SPIu,  
M #%V%<  
package org.rut.util.algorithm.support; bPMf='F{r  
SQN{/")T  
import org.rut.util.algorithm.SortUtil; <~e*YrJ?-  
5f75r  
/** hTPvt  
* @author treeroot %D7'7E8.  
* @since 2006-2-2 %Rf{v5  
* @version 1.0 4-9cp=\PE  
*/ "&\(:#L  
public class HeapSort implements SortUtil.Sort{ d <zD@ z  
BWr!K5w>i  
/* (non-Javadoc) B)dd6R>8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mS.!lkV  
*/ Ds@K%f(.?w  
public void sort(int[] data) { B5_QH8kt7  
MaxHeap h=new MaxHeap(); ES#q/yab5  
h.init(data); rMJ4w['J=  
for(int i=0;i h.remove(); 24f N3  
System.arraycopy(h.queue,1,data,0,data.length); ~se ;L  
} mA #^Pv*  
jU}  
private static class MaxHeap{ "V,dH%&j  
@JOsG-VW~  
void init(int[] data){ ) }k"7"  
this.queue=new int[data.length+1]; ObataUxQT  
for(int i=0;i queue[++size]=data; @?</8;%3W  
fixUp(size); 2 ]r5e;  
} m-q O yt  
} uL^X$8K;(  
\\ZhM  
private int size=0; r%LG>c`^  
,pW^>J  
private int[] queue; <!X]$kvG  
V3axwg_  
public int get() { @Q:?,  
return queue[1]; #Zn+-Ih  
} .SBN^fq  
bf[l4$3k  
public void remove() { UYpln[S  
SortUtil.swap(queue,1,size--); VD{_6  
fixDown(1); SQk5SP  
} ePxf.U  
file://fixdown zj=F4]w  
private void fixDown(int k) { 'NnmLM(oh  
int j; o/!a7>xO4  
while ((j = k << 1) <= size) { C%P.`NxA  
if (j < size %26amp;%26amp; queue[j] j++; 7f~7vydZ}  
if (queue[k]>queue[j]) file://不用交换 M F$NcU  
break; P[e#j  
SortUtil.swap(queue,j,k); /FcwsD\=$  
k = j; r?`7i'  
} u;8bbv4  
} [Vou G{  
private void fixUp(int k) { x/ P\qI  
while (k > 1) { D.h<!?E%  
int j = k >> 1; ]`}EOS-Q  
if (queue[j]>queue[k]) T8vMBaU!qY  
break; QFhQfn  
SortUtil.swap(queue,j,k); e XmYw^n  
k = j; ^{g+HFTA@  
} |G)bnmi7  
} |mz0 ]  
/jOug>s  
} =[Tf9u QY  
<"S/M]9  
} WW~QK2o-@  
b~K-mjJI  
SortUtil: u_$Spbc]/  
KpO%)M!/Z#  
package org.rut.util.algorithm; mPi{:  
ML X: S?  
import org.rut.util.algorithm.support.BubbleSort; BFn}~\wzK  
import org.rut.util.algorithm.support.HeapSort; L/O:V^1  
import org.rut.util.algorithm.support.ImprovedMergeSort; yF^)H{yx  
import org.rut.util.algorithm.support.ImprovedQuickSort; opCQ=G1  
import org.rut.util.algorithm.support.InsertSort; AOCiIPw  
import org.rut.util.algorithm.support.MergeSort; dr4m}v.  
import org.rut.util.algorithm.support.QuickSort; o4&#,m+ :  
import org.rut.util.algorithm.support.SelectionSort; 2V*<J:;wb  
import org.rut.util.algorithm.support.ShellSort; l3kBt-m  
l`{JxVg  
/** Oin:5K)4-  
* @author treeroot +L#):xr  
* @since 2006-2-2 uTP4r  
* @version 1.0 Y F W0  
*/ @wXo{p@W  
public class SortUtil { 6r)qM)97  
public final static int INSERT = 1; 1;+(HB  
public final static int BUBBLE = 2; R=HcSRTkA  
public final static int SELECTION = 3; vu)V:y  
public final static int SHELL = 4; DFqVZ   
public final static int QUICK = 5; nZUBblRJ)  
public final static int IMPROVED_QUICK = 6; h,'m*@Eg  
public final static int MERGE = 7; }sGH}n<9*  
public final static int IMPROVED_MERGE = 8; i(<do "Am<  
public final static int HEAP = 9; 8f#&CC!L  
6z+*H7Qz  
public static void sort(int[] data) { No)@#^  
sort(data, IMPROVED_QUICK); =7U 8`]WA  
} $ZE"o`=7  
private static String[] name={ :*lB86Ly  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -Cf< #'x_  
}; YZ+<+`Mz<  
vlZ?qIDe  
private static Sort[] impl=new Sort[]{ K 7d]p0d'  
new InsertSort(), e+O0l  
new BubbleSort(), Jm G)=$,  
new SelectionSort(), 6.GIUM%D  
new ShellSort(), !rgdOlTR^  
new QuickSort(), m2Q#ATLW  
new ImprovedQuickSort(), ,vUMy&AV  
new MergeSort(), ed7Hz#Qc  
new ImprovedMergeSort(), qL68/7:A  
new HeapSort() tPho4,x$  
}; 9Dy/-%Ut9  
affig  
public static String toString(int algorithm){ ^'aMp}3iu  
return name[algorithm-1]; .;9I:YB$  
} WqRg/  
:+|os"  
public static void sort(int[] data, int algorithm) { 0@8EIQxK"  
impl[algorithm-1].sort(data); ||k^pzj%  
} ]#x? [ F  
B (dq$+4  
public static interface Sort { *Z"(K\1TH  
public void sort(int[] data); |Xl,~-.  
} m.N/g,  
0sKY;(  
public static void swap(int[] data, int i, int j) { Ot_xeg;7  
int temp = data; P(za8l>  
data = data[j]; ws$!-t4<(  
data[j] = temp; t6O/Q0_  
} l]o&D))R  
} }x1p~N+;  
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