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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。 ;EE&~&*w  
插入排序: 5Gw!9{ke  
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package org.rut.util.algorithm.support; :o.x=c B  
<6}f2^  
import org.rut.util.algorithm.SortUtil; c]g<XVI  
/** >'2w\Uk~:  
* @author treeroot UgnsV*e&  
* @since 2006-2-2 W[1f]w3  
* @version 1.0 PtPGi^  
*/ Dj,+t+|  
public class InsertSort implements SortUtil.Sort{ &G7)s%q  
0bnVIG2q  
/* (non-Javadoc) C%95~\Ds  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +}`O^#<qLX  
*/ <QkN}+B=  
public void sort(int[] data) { UuOLv;v  
int temp; 6'No4[F 4n  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); T ,O<LFv  
} RB% fA%d  
} s5zGg]0  
} RIVL 0Ig  
[c KI0  
} f)AW! /  
S}v{^vR  
冒泡排序: "j.oR}s9?#  
<mo^Y k3  
package org.rut.util.algorithm.support; X#Dhk6  
>jrz;r  
import org.rut.util.algorithm.SortUtil;  Z@.ol Y  
:#W>SO  
/** Hs4zJk  
* @author treeroot P^_d$  
* @since 2006-2-2 Ng_rb KXC#  
* @version 1.0 'Qs 3  
*/ %:be{Y6  
public class BubbleSort implements SortUtil.Sort{ RZ/+ K=  
]=86[A-2N  
/* (non-Javadoc) UTK.tg  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ev;5 ?9\E  
*/ "-j@GCme  
public void sort(int[] data) { I 3zitI;  
int temp; Pdo5 sve  
for(int i=0;i for(int j=data.length-1;j>i;j--){ lc$@Jjg9  
if(data[j] SortUtil.swap(data,j,j-1); A^r [_dyZ  
} 9tc@   
} C!/8e (!N  
} `i>B|g-  
} Z_OqXo=  
 I^(o3B  
} Vg [5bJ5  
4G;`KqR@  
选择排序: dS;|Kl[Om  
4}_w4@(  
package org.rut.util.algorithm.support; H'= i  
xU\:Vid+A  
import org.rut.util.algorithm.SortUtil; Y^*$PED?  
?D )qgH  
/** p3A-WK|NX  
* @author treeroot [vjkU7;7A  
* @since 2006-2-2 )oxP.K8q)U  
* @version 1.0 sei!9+bZr  
*/ bU4+P A@$  
public class SelectionSort implements SortUtil.Sort { "$:y03V  
/?dQUu ^z  
/* ^%*{:0'  
* (non-Javadoc) 73sAZa|  
* #:\+7mCF  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J*lYH]s  
*/ MTITIecw=  
public void sort(int[] data) { LWb}) #E  
int temp; CQuvbAo  
for (int i = 0; i < data.length; i++) { milK3+N  
int lowIndex = i; |z7Crz  
for (int j = data.length - 1; j > i; j--) { CIik@O*  
if (data[j] < data[lowIndex]) { ;,B@84'  
lowIndex = j; E?q'|f  
} 1'U%7#;E  
} p_40V%y^  
SortUtil.swap(data,i,lowIndex); ;k41+O:f@  
} _]r)6RT  
} %"KWjwp  
l-h7ksRs  
} "RJk7]p`*  
$5"-s]  
Shell排序: @ H`QLm  
'a{5}8+8  
package org.rut.util.algorithm.support; wPO@f~[Ji  
ohtn^o;C}  
import org.rut.util.algorithm.SortUtil; Zn 5m.=z  
kFa?q} 47  
/** eNC5' Z  
* @author treeroot Z%n.:I<%ZV  
* @since 2006-2-2 D>x'3WYR  
* @version 1.0 LYq2A,wm$  
*/ mlw BATi  
public class ShellSort implements SortUtil.Sort{ $XU$?_O  
xo_k"'f+  
/* (non-Javadoc) +U/"F|M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lp]C![\>U  
*/ 6exlb:  
public void sort(int[] data) { -K'84 bZ  
for(int i=data.length/2;i>2;i/=2){ 0_zSQn9c  
for(int j=0;j insertSort(data,j,i); AA& dZjz  
} =cKk3kJC  
} &fy8,}  
insertSort(data,0,1); o-CJdOS  
} leYmV FE  
1H[;7@o$e  
/** QEHZ=Yg%3  
* @param data W6/p-e5y  
* @param j Gc!{%x  
* @param i L2O57rT2  
*/ 4aGpKvW  
private void insertSort(int[] data, int start, int inc) { rHdP4:n  
int temp; WI 4_4  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); |Gs-9+'y  
} 2?nyPqT3AM  
} {}C7VS1  
} -Jrc'e4K  
1:s~ ]F@  
} ,v5>sL  
&+{xR79+&  
快速排序: n2hsG.4  
k'q !MZU  
package org.rut.util.algorithm.support; ^A<.s_  
h=y(2xA  
import org.rut.util.algorithm.SortUtil; :Du{8rV  
b`Ek;nYek  
/** 9/KQAc*  
* @author treeroot B;7s]R  
* @since 2006-2-2 <0qY8  
* @version 1.0 ]G&\L~P  
*/ K:50?r_-6  
public class QuickSort implements SortUtil.Sort{ %|* y/m  
#YVDOR{z  
/* (non-Javadoc) cCKda3v!O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R#bV/7Ol  
*/ B=/=U7T  
public void sort(int[] data) { &>4$ [m>n  
quickSort(data,0,data.length-1); 9U1!"/F  
} so&3A&4cL  
private void quickSort(int[] data,int i,int j){ (qONeLf%  
int pivotIndex=(i+j)/2; J; Xz'0  
file://swap :*%\i' $!/  
SortUtil.swap(data,pivotIndex,j); l+X^x%EA  
p 8Hv7*  
int k=partition(data,i-1,j,data[j]); _r)nbQm&  
SortUtil.swap(data,k,j); 2xBGs9_Y  
if((k-i)>1) quickSort(data,i,k-1); JJOs L!@  
if((j-k)>1) quickSort(data,k+1,j); 2-2LmxLG  
^n5QK HD  
} vjWgR9 4/{  
/** / ^M3-5@Q  
* @param data XxQ2g&USk  
* @param i .shI% 'V  
* @param j Ds5&5&af  
* @return ^o<Nz8  
*/ 8(K~QvE~  
private int partition(int[] data, int l, int r,int pivot) { ]@]"bF!Dn  
do{ t$D[,$G9  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Z{)|w=  
SortUtil.swap(data,l,r); 2YEn)A@8  
} . k DCcnm  
while(l SortUtil.swap(data,l,r); jo:p*Q "F  
return l; bbA<Zp  
} j*\MUR=  
)p](*Z^  
} GDe$p;#"9g  
>%A=b}VS  
改进后的快速排序: $k=rd#3  
Du4?n8 o  
package org.rut.util.algorithm.support; *Y>'v%  
ViONG]F  
import org.rut.util.algorithm.SortUtil; ;yoq/  
r2`?Ta  
/** |EU08b]P29  
* @author treeroot wC@ U/?  
* @since 2006-2-2 9uo\&,,  
* @version 1.0 7En~~J3  
*/ qo ![#s  
public class ImprovedQuickSort implements SortUtil.Sort { Fd0FG A&L  
,FPgs0rrS  
private static int MAX_STACK_SIZE=4096; !LESRh?  
private static int THRESHOLD=10; ~$ Yuxo  
/* (non-Javadoc) p`C5jfI  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xBd% e-r  
*/ ]sIFK  
public void sort(int[] data) { ]z@]Fi33Y  
int[] stack=new int[MAX_STACK_SIZE]; yrb%g~ELGn  
I*t}gvUt9  
int top=-1; A#\X-8/  
int pivot; xk<0QYv   
int pivotIndex,l,r; Jx,s.Z0@7,  
v0p EN\  
stack[++top]=0; U_04QwhK7  
stack[++top]=data.length-1; $x<-PN  
R'_[RHFC  
while(top>0){ RAa1KOxZX  
int j=stack[top--]; -#hl& ^u$  
int i=stack[top--]; ttxOP  
hTqJDP"&F  
pivotIndex=(i+j)/2; +%^xz 1m  
pivot=data[pivotIndex]; svII =JB  
Xp@OIn  
SortUtil.swap(data,pivotIndex,j); {rr\hl-$  
E_#&L({|@  
file://partition q9Wtu7/  
l=i-1; m{" zFD/  
r=j; fe,CY5B{  
do{ H$HhB8z3  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); !ym5' h  
SortUtil.swap(data,l,r); Z!6G (zz:>  
} ~Y$1OA8  
while(l SortUtil.swap(data,l,r); Il[WXt<S  
SortUtil.swap(data,l,j); _TiF}b!hi  
Z H*?~ #  
if((l-i)>THRESHOLD){ &'j77tqOk  
stack[++top]=i; B$n\m854  
stack[++top]=l-1; dWEx55>,1  
} Ro69woU  
if((j-l)>THRESHOLD){ -R]S)Odml  
stack[++top]=l+1; L T!X|O.  
stack[++top]=j; p^3d1H3   
} 5^i ^?  
_;+&'=6.[  
} :I8t}Wg  
file://new InsertSort().sort(data); UJ+JVj   
insertSort(data); p<NgT1"{  
} q9>w3 <  
/** {w(N9Va,(  
* @param data #=c%:{O{4R  
*/ TW$^]u~v  
private void insertSort(int[] data) { SX.v5plhc  
int temp; XPSWAp)  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); qx NV~aK  
} _,QUH"  
} /fEXAk  
} Yy5F'RY  
e wR0e.g  
} bL<cg tz7)  
sP#5l @  
归并排序: *HUqW}_r  
i+6/ g  
package org.rut.util.algorithm.support; Uk#1PcPd  
`3Y+:!q  
import org.rut.util.algorithm.SortUtil; N_U D7P1  
Ex{]<6UAu  
/** `K.yE0^i  
* @author treeroot YrX{,YtiX  
* @since 2006-2-2 B("kE`  
* @version 1.0 ]H*=Z:riu  
*/ )ALcmC?!#  
public class MergeSort implements SortUtil.Sort{ z'o+3 zq^  
O@VmV>m  
/* (non-Javadoc) r0,}f\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -vQ`}e1  
*/ m"5gzH  
public void sort(int[] data) { ~PHG5?X  
int[] temp=new int[data.length]; }0o0"J-$  
mergeSort(data,temp,0,data.length-1); uFgw eOJ  
} %$Uw]a  
8^~]Ym:  
private void mergeSort(int[] data,int[] temp,int l,int r){ Cq=c'(cX  
int mid=(l+r)/2; Yi3DoaS;"  
if(l==r) return ; ^[6AOz+L  
mergeSort(data,temp,l,mid); (uE_mEIsv  
mergeSort(data,temp,mid+1,r); 4?cg6WJ'6  
for(int i=l;i<=r;i++){ i@6 kI C  
temp=data; uQ}kq7gd  
} "lm3o(Dk  
int i1=l; (<t)5?@%  
int i2=mid+1; f#?R!pR  
for(int cur=l;cur<=r;cur++){ <cS1}"  
if(i1==mid+1) pE#0949  
data[cur]=temp[i2++]; & |r)pl0$  
else if(i2>r) -3C~}~$>`  
data[cur]=temp[i1++]; I[/u5V_b'  
else if(temp[i1] data[cur]=temp[i1++]; H Zc;.jJ  
else W#$rC<Jh]  
data[cur]=temp[i2++]; ?:,j9:m?  
} "Y6 f.rB  
} ;iWCV& >w  
W NCdk$  
} xE:p)B-]  
;)*Drk*t,  
改进后的归并排序: ?V+=uTCq  
:'03*A_[  
package org.rut.util.algorithm.support; cVU[>gkg_  
M~v{\!S  
import org.rut.util.algorithm.SortUtil; d] {^  
X#fI$9a  
/** 2gi`^%#k]  
* @author treeroot FTn[$q  
* @since 2006-2-2 t_3XqjuA  
* @version 1.0 5,A/6b  
*/ "{}5uth  
public class ImprovedMergeSort implements SortUtil.Sort { 1*s Lj#  
BX?Si1c  
private static final int THRESHOLD = 10; gC?k6)p$N  
-Rmz`yOq}  
/* 9tJiIr8i  
* (non-Javadoc) 3OTSLF/  
* fz%urbJR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -LF^u;s8&S  
*/ W,vb7v'  
public void sort(int[] data) { Gg/K  
int[] temp=new int[data.length]; $?7}4u,  
mergeSort(data,temp,0,data.length-1); aX~7NslR  
} [b`k\~N4r  
\ /o`CV{O  
private void mergeSort(int[] data, int[] temp, int l, int r) { jl@xcs]#  
int i, j, k; =2< >dM#`  
int mid = (l + r) / 2; N=(rl#<  
if (l == r) ibh!8"[  
return; hD"Tjd` P  
if ((mid - l) >= THRESHOLD) yB&s2J  
mergeSort(data, temp, l, mid); N[Fz6,ZG _  
else R/iXO~/"J  
insertSort(data, l, mid - l + 1); jGId)f!)  
if ((r - mid) > THRESHOLD) YS &3+Tp  
mergeSort(data, temp, mid + 1, r); Q\}5q3  
else 7JjTm^bu  
insertSort(data, mid + 1, r - mid); wj5{f5 RWV  
!-[e$?-  
for (i = l; i <= mid; i++) { (2 X`imJ  
temp = data; 'z@(,5  
} `uY77co6  
for (j = 1; j <= r - mid; j++) { -(P"+g3T  
temp[r - j + 1] = data[j + mid]; ZPHB$]ri  
} 7D<M\l8G  
int a = temp[l]; *?cE]U6;  
int b = temp[r]; N|wI=To  
for (i = l, j = r, k = l; k <= r; k++) { 7aS`S F  
if (a < b) { (wkeo{lx  
data[k] = temp[i++]; @#;2P'KL  
a = temp; "??$yMW  
} else { a=Pl3Uo  
data[k] = temp[j--]; S U04q+  
b = temp[j]; w(0's'  
} w\!aKeP'  
} +TL5yuA  
} z^bv)u  
Z)?B5FF  
/** mGb,oj7l  
* @param data M, f6UYo=  
* @param l U,\3 !D0jt  
* @param i WZ> }  
*/ R^4JM,v9x`  
private void insertSort(int[] data, int start, int len) { iLD}>=  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Tc$Jvy-G4A  
} X|++K;rtfE  
} :+06M@  
} K 0R<a~  
} 7b7@"Zw*  
(hr*.NS#  
堆排序: 7,X5]U&A<x  
06X4mu{  
package org.rut.util.algorithm.support; WKek^TW4HE  
_HjS!(lMk  
import org.rut.util.algorithm.SortUtil; RDGefxv  
CEzwI _  
/** vr/*z euA  
* @author treeroot F/}(FG<'>I  
* @since 2006-2-2 Q*&k6A"jx  
* @version 1.0 &V"9[0  
*/ f-$%Ck$%,  
public class HeapSort implements SortUtil.Sort{ VEFUj&t;xW  
<u`m4w  
/* (non-Javadoc) U~H]w ,^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @~1}n/  
*/ Qx<86aKkF  
public void sort(int[] data) { =zBc@VTp  
MaxHeap h=new MaxHeap(); ;l4 epN  
h.init(data); HFlMx  
for(int i=0;i h.remove(); B bP&-c  
System.arraycopy(h.queue,1,data,0,data.length); x:dI:G  
} qGivRDR$  
-aSj-  
private static class MaxHeap{ AXN%b2  
ZE393FnE  
void init(int[] data){ s&.VU|=VQ@  
this.queue=new int[data.length+1]; #u]'3en  
for(int i=0;i queue[++size]=data; E)ne z  
fixUp(size); S1SsJo2\  
} 3IB||oN$T  
} (58}G2}q  
W[BwHNxyg  
private int size=0;  {@E(p4W  
hsCts@R  
private int[] queue; &-R(u}m-F  
LKX; ^  
public int get() { 7^bde<0  
return queue[1]; fC|NK+Xd`  
} lE|Hp  
crvq]J5  
public void remove() { $*-UY  
SortUtil.swap(queue,1,size--); ,2>nr goM  
fixDown(1); <36z,[,kZ@  
} E=3UaYr  
file://fixdown HuB\92u  
private void fixDown(int k) { N Ftmus  
int j; jVdRy{MH  
while ((j = k << 1) <= size) { Rlyx& C8  
if (j < size %26amp;%26amp; queue[j] j++; ))9w)A@  
if (queue[k]>queue[j]) file://不用交换 5yl[#>qt  
break; 8slOB>2#Y  
SortUtil.swap(queue,j,k); `2I<V7SF$  
k = j; -5X*y4#  
} a Byetc88/  
} ,RXfJh  
private void fixUp(int k) { | > t,1T.  
while (k > 1) { L;%_r)  
int j = k >> 1; S W; %2  
if (queue[j]>queue[k]) $v \@mW*R  
break; nm}wdel"  
SortUtil.swap(queue,j,k); %D_pTD\  
k = j; g#}a?kTM@  
} KB@F^&L {  
} I7C*P~32{n  
:i};]pR   
} %pd-{KR  
Gm1[PAj  
} HAca'!p  
aK+jpi4?  
SortUtil: I&Dp~aEM]  
FBk_LEcX  
package org.rut.util.algorithm; oU[>.Igi  
S9VD/  
import org.rut.util.algorithm.support.BubbleSort; ]IQ`.:g=9  
import org.rut.util.algorithm.support.HeapSort; _*1{fvv0{  
import org.rut.util.algorithm.support.ImprovedMergeSort; iD"9,1@~n  
import org.rut.util.algorithm.support.ImprovedQuickSort; 9vL n#_  
import org.rut.util.algorithm.support.InsertSort; :=cZ,?PQp1  
import org.rut.util.algorithm.support.MergeSort; MpCK/eiC  
import org.rut.util.algorithm.support.QuickSort; 3@*orm>em  
import org.rut.util.algorithm.support.SelectionSort; bd & /B&a  
import org.rut.util.algorithm.support.ShellSort; u|eV'-R)s  
> 3SZD  
/** -:]-g:;/  
* @author treeroot xp68-&  
* @since 2006-2-2 ~u^MRe|`  
* @version 1.0 %j4AX  
*/ ^6kE tTO*  
public class SortUtil { B{6wf)[O  
public final static int INSERT = 1; ^$VH~i&  
public final static int BUBBLE = 2; -qW[.B  
public final static int SELECTION = 3; b,r{wrLe)  
public final static int SHELL = 4; 8x/]H(J  
public final static int QUICK = 5; fC<pCdsg  
public final static int IMPROVED_QUICK = 6; ?BA~$|lfxu  
public final static int MERGE = 7; 9o<5Z=  
public final static int IMPROVED_MERGE = 8; JIH6!  
public final static int HEAP = 9; L!l`2[F|  
='z4bU  
public static void sort(int[] data) { vlSSw+r9  
sort(data, IMPROVED_QUICK); Op>l~{{{  
} F15Yn  
private static String[] name={ 1Vi3/JM @  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" % Ix   
}; 6aq=h`Y  
1Ax{Y#<  
private static Sort[] impl=new Sort[]{ E,wOWs*  
new InsertSort(), >\s8S}p  
new BubbleSort(), 7AouiL 2-W  
new SelectionSort(), P7D__hoE  
new ShellSort(), fnZ?YzLI  
new QuickSort(), 8{)j"rghah  
new ImprovedQuickSort(), >Y 8\I  
new MergeSort(), X :wfmb  
new ImprovedMergeSort(), X Z4q{^o  
new HeapSort() `SM37({c  
}; 3-6Lbe9H  
`~;`q  
public static String toString(int algorithm){ nd3n'b  
return name[algorithm-1]; zNRR('B?  
} (Ee5Af,4  
(Rs052m1  
public static void sort(int[] data, int algorithm) { \iQ{Q &JR:  
impl[algorithm-1].sort(data);  J]4pPDm  
} 3 z~d7J  
T6^ H%;G  
public static interface Sort { /O {iL:`  
public void sort(int[] data); dK d"2+fH  
} mnm 7{?#[  
W"[Q=$2<<  
public static void swap(int[] data, int i, int j) { SDHJX8Hq  
int temp = data; 3Q:HzqG  
data = data[j]; ,We'A R3X  
data[j] = temp; D\0q lCAs  
} 'MK"*W8QRM  
} 1G`zwfmh~  
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