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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。 f,h J~  
插入排序: "$#xK|t  
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package org.rut.util.algorithm.support; o< |cA5f\  
I8wXuIN_  
import org.rut.util.algorithm.SortUtil; {@eJtF+2  
/** 1C< uz29  
* @author treeroot u[@l~gwL  
* @since 2006-2-2 Eo{"9j\  
* @version 1.0 3.|S  
*/ .<jr0,i  
public class InsertSort implements SortUtil.Sort{ YPU*@l>  
5:pM 4J  
/* (non-Javadoc) *@Lp`thq  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p`b"-[93  
*/ 61SlVec*o8  
public void sort(int[] data) { o|>'h$  
int temp; Sh/T,  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); cc,^6[OH@  
} FG6h,7+  
} PPb7%2r  
} D?;"9e%  
kDEPs$^  
} #xho[\  
(61EDKNd9  
冒泡排序: *^g:P^4  
.X@FXx&  
package org.rut.util.algorithm.support; )Ub_@)X3%l  
^A!Qc=#z}  
import org.rut.util.algorithm.SortUtil; 4]yOF_8h  
_"E%xM*r  
/** YM1'L\^  
* @author treeroot TT2d81I3m  
* @since 2006-2-2 F20E_2;@@  
* @version 1.0 [<2<Y  
*/ P^ A!.}d  
public class BubbleSort implements SortUtil.Sort{ {9?JjA  
uD}2<$PP  
/* (non-Javadoc) fmQ_P.c  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BcL{se9<  
*/ ~<O7$~  
public void sort(int[] data) { :yRo3c  
int temp; KV]X@7`@  
for(int i=0;i for(int j=data.length-1;j>i;j--){ `7[EKOJ3g  
if(data[j] SortUtil.swap(data,j,j-1); 5"CZh.J  
} igIRSN}h  
} 3Ndq>  
}  8cU}I4|  
} k,85Y$`'  
rm5bkJcg~  
}  `7 vHt`  
:Pvzl1  
选择排序: I%r{]-Obr-  
JG" R\2  
package org.rut.util.algorithm.support; ey2S#%DF]  
$CY~5A`l9  
import org.rut.util.algorithm.SortUtil; 6N",- c  
43|XSyS  
/** 4[.oPK=i  
* @author treeroot j"}*T  
* @since 2006-2-2 aNScF  
* @version 1.0 ZG>PQA  
*/ TOkp%@9/  
public class SelectionSort implements SortUtil.Sort { lhYe;b(  
IAw{P08+  
/* HW=C),*]cR  
* (non-Javadoc) 6eT5ktf  
* ]ro*G"-_1#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SLkhCR  
*/ VRI0W`  
public void sort(int[] data) { OHeT,@(mh  
int temp; [Grxw[(_:  
for (int i = 0; i < data.length; i++) { T+*%?2>q"  
int lowIndex = i; mp=z  
for (int j = data.length - 1; j > i; j--) { !D@ZYK;  
if (data[j] < data[lowIndex]) { i&5XF  
lowIndex = j; { &"CH]r  
} spdvZU=}  
} U> cV|  
SortUtil.swap(data,i,lowIndex); \!k1a^ZP  
} d/ARm-D  
} /DK"QV!]s  
*]AdUEV?  
} -db_E#  
P+s !|7'  
Shell排序: nSW=LjrO~<  
eCqHvMp  
package org.rut.util.algorithm.support; XiL~TCkx4  
|2RC#]/-Y  
import org.rut.util.algorithm.SortUtil; ,eTUhK  
;%<,IdhN  
/** 6kNrYom  
* @author treeroot !9[>L@#G  
* @since 2006-2-2 _I)U%? V+  
* @version 1.0 {4G%:09~J  
*/ =h0,?]z  
public class ShellSort implements SortUtil.Sort{ <~6h|F8  
cl]Mi "3_  
/* (non-Javadoc) 5_- (<B  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v*r7Zz6l  
*/ ToJ$A`_!`  
public void sort(int[] data) { z.kvX+7'  
for(int i=data.length/2;i>2;i/=2){ (BTVD,G  
for(int j=0;j insertSort(data,j,i); EK;YiJ  
} vr6MU<  
} cd(GvX'  
insertSort(data,0,1); H,DM1Z9rz  
} ~F4fFQ-yy  
lr`&mZ( j  
/** qAn!RkA  
* @param data pi Z[Y 5OE  
* @param j MCS8y+QK  
* @param i ;D:9+E<>a  
*/ @)|C/oA  
private void insertSort(int[] data, int start, int inc) { EB2w0a5  
int temp; 4)@mSSfn.  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); WU quN  
} X $ s:>[H  
} t=Xv;=daB  
} SZ,YS 4M  
|y0(Q V  
} CDP U\ZG  
{ OXFN;2  
快速排序: ,q}ML TS i  
Z Uox Mm  
package org.rut.util.algorithm.support; U*22h` S  
ujlY! -GM  
import org.rut.util.algorithm.SortUtil; @JD;k>  
QR%mj*@Wle  
/** 2w["aVr =  
* @author treeroot $wo?!gt  
* @since 2006-2-2 }T&iewk  
* @version 1.0 NYrQ$N"  
*/ XZ^^%*ew  
public class QuickSort implements SortUtil.Sort{ {ys=Ndo8  
{u#;?u=|  
/* (non-Javadoc) +kzo*zW$L  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j@SQ~AS  
*/ $npT[~U5  
public void sort(int[] data) { M luVx'  
quickSort(data,0,data.length-1); :cF[(i/k4  
} ^Wt*  
private void quickSort(int[] data,int i,int j){ xT   
int pivotIndex=(i+j)/2; .(^ ,z&  
file://swap f33l$pOp  
SortUtil.swap(data,pivotIndex,j); - `p4-J!Fy  
] Hztb  
int k=partition(data,i-1,j,data[j]); L*&p !  
SortUtil.swap(data,k,j); :I+Gu*0WD  
if((k-i)>1) quickSort(data,i,k-1); xa<UM5eI  
if((j-k)>1) quickSort(data,k+1,j); n)^i/ nXb'  
[8T^@YN  
} :9QZPsL  
/** 2zs73:z  
* @param data 9s6U}a'c  
* @param i G#d{,3Gq1  
* @param j Urr@a/7  
* @return ]sE?ezu  
*/ C~o7X^[R\  
private int partition(int[] data, int l, int r,int pivot) { j)<IRD^  
do{ 6YGubH7%_  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); &6ZD136  
SortUtil.swap(data,l,r); e[&L9U6GW-  
} q,93nhs "  
while(l SortUtil.swap(data,l,r); *X+79vG:  
return l; }a/x._[s  
} J&.{7YF  
PIdikA  
} " @v <Bk  
p<,*3huj  
改进后的快速排序: Bq D'8zLD  
^j31S*f&:  
package org.rut.util.algorithm.support; +^=8ge}  
56zL"TF`  
import org.rut.util.algorithm.SortUtil;  UA48Ug  
*>n;SuT_  
/** {>DE sO  
* @author treeroot qz0;p=$8Z  
* @since 2006-2-2 Y]/% t{Y  
* @version 1.0 VGpWg rmHk  
*/ O(D ~_O.  
public class ImprovedQuickSort implements SortUtil.Sort { 2O.i\cH  
] 6TATPIr  
private static int MAX_STACK_SIZE=4096; ms*(9l.hOK  
private static int THRESHOLD=10; _kU:Z  
/* (non-Javadoc) o<COm9)i  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0K`#>}W#X  
*/ y5?RVlKJ  
public void sort(int[] data) { Ji>o!  
int[] stack=new int[MAX_STACK_SIZE]; n%-R[vW  
`(_s|-$  
int top=-1; 9~]~#Uj  
int pivot; mlJ!:WG  
int pivotIndex,l,r; 5|o6v1bM  
wr$M$i:  
stack[++top]=0; j4jTSLQ\  
stack[++top]=data.length-1; eYN5;bx)W  
|wiqGzAr{  
while(top>0){ $$ Oey)*  
int j=stack[top--]; aMWmLpv4'  
int i=stack[top--]; zO).T M_  
p i %< Sy  
pivotIndex=(i+j)/2; {^CY..3 A  
pivot=data[pivotIndex]; y(CS5v#FG  
|iE50,  
SortUtil.swap(data,pivotIndex,j); n `&/ D  
==3dEJS  
file://partition Tn*9lj4  
l=i-1;  >qS9PX  
r=j; 5-aj 2>=7  
do{ j|U#)v/  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 8ZM&(Lz7u  
SortUtil.swap(data,l,r); *K|W /'_&  
} nqI@Y)  
while(l SortUtil.swap(data,l,r); eg(6^:z?f  
SortUtil.swap(data,l,j); FbS|~Rp~  
gW>uR3Ca4  
if((l-i)>THRESHOLD){ 'ig&$fzb  
stack[++top]=i; #_6I w`0  
stack[++top]=l-1; /Z~<CbKKl  
} wy0tgy(' |  
if((j-l)>THRESHOLD){ 8$6Y{$&C  
stack[++top]=l+1; `j,Yb]~s79  
stack[++top]=j; x3 q]I8q  
} O_wEcJPE  
OSs&r$  
} :Av#j@#  
file://new InsertSort().sort(data); 7"sD5N/>uh  
insertSort(data); q8/MMKCbX  
} g.BdlVB\  
/** l_o@miG/  
* @param data }+.}J  
*/ [x+FcXb  
private void insertSort(int[] data) { K@I D/]PF  
int temp; #$18*?tLv|  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); cAY:AtD  
} d:BG#\e]v  
} Yw^m  
} wSa)*]%  
&dM. d!  
} ^ DaBz\  
^hc!FD  
归并排序: OGK}EI  
{:6r;TB  
package org.rut.util.algorithm.support; ,}3 'I [  
/t+f{VX$  
import org.rut.util.algorithm.SortUtil; o /j*d3  
(;T^8mI2  
/** hQYL`Dni  
* @author treeroot D{GfL ib"U  
* @since 2006-2-2 F*IzQ(#HW  
* @version 1.0 11o.c;  
*/ vdAr|4^qB  
public class MergeSort implements SortUtil.Sort{ 'u*D A|HC  
,:%CB"J  
/* (non-Javadoc) [pbo4e,4O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RRmz"j>  
*/ ULs\+U  
public void sort(int[] data) { ;_c;0)  
int[] temp=new int[data.length]; 1oR7iD^  
mergeSort(data,temp,0,data.length-1); Zq+v6fk_Mn  
} X{5vXT\/y  
S\:P-&dC  
private void mergeSort(int[] data,int[] temp,int l,int r){ ZP@ $Q%up  
int mid=(l+r)/2; wPQH(~k:  
if(l==r) return ; cG[l!Z  
mergeSort(data,temp,l,mid); 0)Uce=t`  
mergeSort(data,temp,mid+1,r); 8&GBV_`I  
for(int i=l;i<=r;i++){ 4 {y)TZ  
temp=data; \UPjf]&  
} e7 ^mmm  
int i1=l; ~xkeuU  
int i2=mid+1; )eUh=eW  
for(int cur=l;cur<=r;cur++){ S0zD"T  
if(i1==mid+1) /rK}?U  
data[cur]=temp[i2++]; (?n=33}Ci  
else if(i2>r) 8EW_V$>R  
data[cur]=temp[i1++]; f.D?sHAn  
else if(temp[i1] data[cur]=temp[i1++]; MqW7cjg  
else TrlZ9?3#D  
data[cur]=temp[i2++]; mWoAO@}Y  
} o} J&E{Tk  
} "|EM;o  
]D?"aX'q>  
} ")SFi^]  
T1ut"Zu  
改进后的归并排序: KI)M JG:t  
;O,+2VzP%^  
package org.rut.util.algorithm.support; 7?#J~.d5  
5x5@t :  
import org.rut.util.algorithm.SortUtil; #eoome2Q  
]O]4z,n  
/** Px4) >/ z,  
* @author treeroot i6^twK)j  
* @since 2006-2-2 }JF13beU  
* @version 1.0 3 }duG/  
*/ \nXtH}9ZF  
public class ImprovedMergeSort implements SortUtil.Sort { =$u! 59_dE  
<CS(c|7  
private static final int THRESHOLD = 10; l{5IUuUi  
"sS}N%!  
/* 1Ir21un  
* (non-Javadoc) k Z?=AXu  
* F^WP<0C  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B^1>PE  
*/ Vx$\hcG  
public void sort(int[] data) { WJQvB=D&  
int[] temp=new int[data.length]; +9M^7/}H  
mergeSort(data,temp,0,data.length-1); bWH&P/>  
} `ZU($!(  
G? ])o5  
private void mergeSort(int[] data, int[] temp, int l, int r) { v&9y4\j  
int i, j, k; 8L, 5Q9 $  
int mid = (l + r) / 2; MV5_L3M  
if (l == r) J=\HO8E6>  
return; qyZ" %Kz  
if ((mid - l) >= THRESHOLD) |t^E~HLm,  
mergeSort(data, temp, l, mid); . k#U]M  
else x.]i }mt  
insertSort(data, l, mid - l + 1); Q 8T]\6)m  
if ((r - mid) > THRESHOLD) 1#C4;3i,  
mergeSort(data, temp, mid + 1, r); >tYm+coS  
else ohRjvJ'v|  
insertSort(data, mid + 1, r - mid); ),0g~'I~D  
d?ex,f.  
for (i = l; i <= mid; i++) { gR&Q3jlIV  
temp = data; SzAJ2:qhl  
} 7S-ys+  
for (j = 1; j <= r - mid; j++) { MDnKX?Y  
temp[r - j + 1] = data[j + mid]; v_<rNc,z-s  
} { d=^}-^   
int a = temp[l]; iJ-23_D  
int b = temp[r]; #H)vK"hF  
for (i = l, j = r, k = l; k <= r; k++) { 02f~En}>6  
if (a < b) { 4QH3fTv   
data[k] = temp[i++]; !02`t4Zc-  
a = temp; hW%TM3l}  
} else { t#V!8EpBg  
data[k] = temp[j--]; (]Z_UTT  
b = temp[j]; /sUYU (3  
} sGi"rg#  
} S ^"y4- 2  
} )SaGH3~*C  
?ME6+Z\  
/** [glLre^  
* @param data O@tU.5*$5  
* @param l lsgh#x  
* @param i ],>@";9u"  
*/ ?~l6K(*2  
private void insertSort(int[] data, int start, int len) { }{,^@xdyW  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FTX=Wyr  
} &4{KV.  
} :nh_k4S@v  
} ? }Z1bH  
} F5LuSy+v  
l>2E (Y|  
堆排序: $~~Jw]   
p2Z?T}fa}&  
package org.rut.util.algorithm.support; "An,Q82oHf  
f~t:L, \,  
import org.rut.util.algorithm.SortUtil; ^?-:'<4q$  
$I!XSz"/e  
/** _ q(ko/T  
* @author treeroot j:^#rFD4?  
* @since 2006-2-2 9`T)@Uj2n  
* @version 1.0 mf A{3  
*/ tGD6AI1"I  
public class HeapSort implements SortUtil.Sort{ i{Uc6 R6  
J; 3{3  
/* (non-Javadoc) O%Scjm-^X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y_'Ub{w  
*/ j5QuAU8  
public void sort(int[] data) { .sxcCrQE  
MaxHeap h=new MaxHeap(); O)C\v F#  
h.init(data); e h&IPU S  
for(int i=0;i h.remove(); !SC`D])l  
System.arraycopy(h.queue,1,data,0,data.length); bo,_&4?  
} szb_*)k  
i#&z2h-b  
private static class MaxHeap{ >] qc-{>&  
&)YQvTzs  
void init(int[] data){ 5<iV2Hx  
this.queue=new int[data.length+1]; ) mI05  
for(int i=0;i queue[++size]=data; }Q)#[#e  
fixUp(size); OtY`@\hy  
} aFc1|.Nm  
} .4_o>D  
A|CmlAW~^  
private int size=0; *]. 7dec/  
Kh"?%ZIa  
private int[] queue; N@;?CKU  
-<c=US  
public int get() { jTf@l?|  
return queue[1]; :lX!\(E2  
} H;D>|q  
Qwz}B  
public void remove() { v&Ii^?CvO  
SortUtil.swap(queue,1,size--); f& 0M*o,)  
fixDown(1); qsF<!'m7`  
} wJg1Y0nh  
file://fixdown t#yk ->,  
private void fixDown(int k) { O1rvaOlr  
int j; NWP5If|'X  
while ((j = k << 1) <= size) { 214Ml0/%  
if (j < size %26amp;%26amp; queue[j] j++; B5gj_^  
if (queue[k]>queue[j]) file://不用交换 jL y  
break; ,368d9,rDz  
SortUtil.swap(queue,j,k); #ml S}~n  
k = j; Hh%I0#  
} Xk:OL,c  
} _G_Cj{w  
private void fixUp(int k) { lackB2J9 A  
while (k > 1) { ?42<J%p  
int j = k >> 1; zuP B6W^  
if (queue[j]>queue[k]) *aXF5S  
break; >@BnV{ d  
SortUtil.swap(queue,j,k); ,V'o4]H  
k = j; ,4 hJT  
} he#J|p  
} H1 2Fw'2  
h-g+g#*  
} 2^XGGB0  
7;u e  
} 4)E_0.C  
#w;v0&p  
SortUtil: rI{=WPI&WU  
"B8Q:  
package org.rut.util.algorithm; z^KJ*E  
$JSL-NkE  
import org.rut.util.algorithm.support.BubbleSort; qsL) }sC^8  
import org.rut.util.algorithm.support.HeapSort; Gk967pC  
import org.rut.util.algorithm.support.ImprovedMergeSort; gep;{G}  
import org.rut.util.algorithm.support.ImprovedQuickSort; *v?`<)P#  
import org.rut.util.algorithm.support.InsertSort; K7$x<5+)  
import org.rut.util.algorithm.support.MergeSort; yZd +^QN  
import org.rut.util.algorithm.support.QuickSort; zFfoqb#*g  
import org.rut.util.algorithm.support.SelectionSort; R= a|Blp  
import org.rut.util.algorithm.support.ShellSort; liEPCWl&  
&vHoRY  
/** w|3z;-#Q;  
* @author treeroot L%">iQOG#  
* @since 2006-2-2 yh^!'!I6u[  
* @version 1.0 }p=Jm)y  
*/ BW-`t-,E;  
public class SortUtil { tv>>l%  
public final static int INSERT = 1; CF&NFSti^  
public final static int BUBBLE = 2; dL:-Y.?0M  
public final static int SELECTION = 3; 85lCj-cs  
public final static int SHELL = 4; M=.:,wRm  
public final static int QUICK = 5; QpZ:gM_  
public final static int IMPROVED_QUICK = 6; :d3bt~b'  
public final static int MERGE = 7; so PLA68  
public final static int IMPROVED_MERGE = 8; ]&?Y~"{cD  
public final static int HEAP = 9; 3WN`y8l  
~0?mBy!-O  
public static void sort(int[] data) { Q)"C&) `l  
sort(data, IMPROVED_QUICK); aF8fqu\  
} k $M]3}$U  
private static String[] name={ Yj%U >),8  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "b?v?V0%C  
}; e}mD]O}  
K )[]fm  
private static Sort[] impl=new Sort[]{ "ZHW2l Mf  
new InsertSort(), _\=`6`b)  
new BubbleSort(), Gn&-X]Rrl  
new SelectionSort(), uC.K<jD%  
new ShellSort(), -g)9R%>-  
new QuickSort(), pqUCqo!m\  
new ImprovedQuickSort(), `J]fcE%T0R  
new MergeSort(), a-y+@#;2_  
new ImprovedMergeSort(), 33jovK 2  
new HeapSort() >Wh}f3C  
}; "mX\&%i6\p  
~SQ?BoCI[  
public static String toString(int algorithm){ DQMHOd7g  
return name[algorithm-1]; cQG +$0(  
} >tTj[cMJl  
& +4gSr  
public static void sort(int[] data, int algorithm) { whonDG4WP  
impl[algorithm-1].sort(data); KiRUvWqa  
} ]'5;|xc9$/  
:!/gk8F|dI  
public static interface Sort { 5'0xz.)!  
public void sort(int[] data); X_qf"|i  
} |\_^ B  
$\b$}wy*  
public static void swap(int[] data, int i, int j) { "nm FzN  
int temp = data; d\%WgH  
data = data[j]; "8'@3$>R=  
data[j] = temp; 79nG|Yj|\  
}  ~UyV<  
} 6Z#\CixG  
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3+5=?,请输入中文答案:八 正确答案:八