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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。 4%4avEa"w  
插入排序: =ph&sn$;L  
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package org.rut.util.algorithm.support; 6R-&-4  
YBYZ=,"d  
import org.rut.util.algorithm.SortUtil; x";w%  
/** t*z~5_/  
* @author treeroot 'E/*d2CDM(  
* @since 2006-2-2 0iULCK  
* @version 1.0 Y$N)^=7  
*/ B]m@:|Q  
public class InsertSort implements SortUtil.Sort{ 4c oJRqf=  
xq-17HKs  
/* (non-Javadoc) z,qRcO&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~<<nz9}o_  
*/ pi=-#g(2  
public void sort(int[] data) { s2?T5oWU  
int temp; b KTcZG  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); tQZs.1=z  
} E$W{8?:{  
} Y2xL>F  
} }X x(^Zh  
A(?\>X 9g  
} 1(|D'y#  
7g R@$(1Z  
冒泡排序: 4&8Gr0C  
P\8@g U!uk  
package org.rut.util.algorithm.support; 1h6 ^>()^  
6x"Q  
import org.rut.util.algorithm.SortUtil; aQI^^$9g  
`D9]*c !mO  
/** :4~g;2oag  
* @author treeroot ^TMJ8` e  
* @since 2006-2-2 `_b`kzJ  
* @version 1.0 d(g^M1 m  
*/ V"p!B f  
public class BubbleSort implements SortUtil.Sort{ 1;Pv0&[q/  
>zDF2Y[  
/* (non-Javadoc) qB)"qFa  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DI!V^M[~u  
*/ Gpm{m:$L  
public void sort(int[] data) { 2H.654  
int temp; j p $Z]  
for(int i=0;i for(int j=data.length-1;j>i;j--){ y5Tlpi`g  
if(data[j] SortUtil.swap(data,j,j-1); GUF"<k  
} K3\#E/Ox  
} gp$Ucfu'  
} 8$(Dz]v|[&  
} !61Pl/uQ  
SIbDj[s  
} YF+n b.0.  
n@ w^ V   
选择排序: V([~r,  
P&Pj>!T5  
package org.rut.util.algorithm.support; mv5n4mav  
yLsz8j-QJ  
import org.rut.util.algorithm.SortUtil; mxb06u _  
n}s~+USZX  
/** 3Tn)Z1o  
* @author treeroot k}KC/d9.z  
* @since 2006-2-2 YeF1C/'hy  
* @version 1.0 GTHkY*  
*/ 0afei4i~N  
public class SelectionSort implements SortUtil.Sort { a0Ik`8^`  
FgLrb#  
/* _fZZ_0\Q  
* (non-Javadoc) s7oT G!  
* *^([ ~[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +7t6k7]c  
*/ "5eNLqt^q  
public void sort(int[] data) { Q}S_%I}u:  
int temp; qF 9NQ;  
for (int i = 0; i < data.length; i++) { k</%YKk  
int lowIndex = i; C> [ Uvc  
for (int j = data.length - 1; j > i; j--) { _|"Y]:j_  
if (data[j] < data[lowIndex]) { -l%J/:  
lowIndex = j; C&++VRnm  
} ~rjTF!  
} 5OoN!TEM  
SortUtil.swap(data,i,lowIndex); z>w`ZD}XY  
} N)&4Hy  
} >DPB!XA3  
fX jG5Tv  
} w '3#&k+  
gKOOHUCb  
Shell排序: 9b?SHzAa  
nenU)*o  
package org.rut.util.algorithm.support; Mwgu93?  
lo'W1p  
import org.rut.util.algorithm.SortUtil; q5>v'ZSo  
= waA`Id  
/** ~tOAT;g}q  
* @author treeroot  iD= p\  
* @since 2006-2-2 >Z1q j>  
* @version 1.0 &qS[%K )  
*/ 4mn&4e  
public class ShellSort implements SortUtil.Sort{ y>*xVK{D  
6\61~u~  
/* (non-Javadoc) zD3mX<sw  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UX]L;kI  
*/ 0euuT@_$  
public void sort(int[] data) { 5MzFUv0)  
for(int i=data.length/2;i>2;i/=2){ !?^b[ nC%  
for(int j=0;j insertSort(data,j,i); 2>*%q%81  
} e[Abp~@M1  
} =TqQbadp  
insertSort(data,0,1); yjJ5P`j]  
} /O ]t R  
D5~n/.B"  
/** /x{s5P 3  
* @param data Py`N4y ~  
* @param j P,sjo u^  
* @param i j[Uxa   
*/ 7<H |QL&  
private void insertSort(int[] data, int start, int inc) { LHJ":^  
int temp; ~Y.tz`2D  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); o!Rd ^  
} 'Wa,OFd\8  
} si4don  
} 1".v6caW  
 jq08=  
} mqq;H}  
Qv-@Zt!8  
快速排序: 97)/"i e  
wCk~CkC?  
package org.rut.util.algorithm.support; jF[ 1za  
TNJG#8n%Y  
import org.rut.util.algorithm.SortUtil; g R nOd  
t#!yrQ..'G  
/**  ["}rk  
* @author treeroot T)\"Xj  
* @since 2006-2-2 k? Xc  
* @version 1.0 3OM2Y_  
*/ j5I`a 1j`  
public class QuickSort implements SortUtil.Sort{ hR5_+cuIp  
Q]o C47(  
/* (non-Javadoc) ItVugI(^ C  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $H$j-)\D  
*/ Ngg?@pG0y  
public void sort(int[] data) { hVUP4 A  
quickSort(data,0,data.length-1); `-3o+ID\  
} _4cvX  
private void quickSort(int[] data,int i,int j){ <_(/X,kBK  
int pivotIndex=(i+j)/2; c)0amM  
file://swap \ u_ui  
SortUtil.swap(data,pivotIndex,j); 4`Ic&c/  
sKyPosnP  
int k=partition(data,i-1,j,data[j]); fg#x7v4O  
SortUtil.swap(data,k,j); Pl-5ncb\  
if((k-i)>1) quickSort(data,i,k-1);  )J?{+3  
if((j-k)>1) quickSort(data,k+1,j); 0kDK~iT  
HHjt/gc}`  
} Lr`1TH,  
/** DQwGUF'(  
* @param data Cye$H9 2  
* @param i cQ:"-!ff  
* @param j gT/@dVV  
* @return ;+1RU v  
*/ XhsTT2B   
private int partition(int[] data, int l, int r,int pivot) { t*@z8<H  
do{ K gN)JD>  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ps$7bN C  
SortUtil.swap(data,l,r); LK"  bC  
} L#)(H^[  
while(l SortUtil.swap(data,l,r); 8QK5z;E2~  
return l; sE{pzPq!  
} kM`l  
g,:j/vR  
} M/Pme&%  
&Z?ut *%S  
改进后的快速排序: 6oSQQhge  
c%*($)#  
package org.rut.util.algorithm.support; l^J75$7  
wv^rS^~  
import org.rut.util.algorithm.SortUtil; lnGq :-  
~XeFOM q  
/** *Ei|fe$sa  
* @author treeroot 0q\7C[R_  
* @since 2006-2-2 _7DkS}NJs  
* @version 1.0 CQ;]J=|<_  
*/ ~ d^<_R  
public class ImprovedQuickSort implements SortUtil.Sort { ;6 +}z~  
.Wi{lt  
private static int MAX_STACK_SIZE=4096; $;G{Pyp  
private static int THRESHOLD=10; Vx_rc%'  
/* (non-Javadoc) a{Esw`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;IK[Y{W/  
*/ Jx#k,Z4  
public void sort(int[] data) { . |*f!w}5  
int[] stack=new int[MAX_STACK_SIZE]; H UoyLy  
!6&W,0<  
int top=-1; `MP|Ovns:H  
int pivot; ,@z4I0cTi\  
int pivotIndex,l,r; 2FD=lR?6  
v}^5Rp&m  
stack[++top]=0; 4lKVY<  
stack[++top]=data.length-1; vILy>QS)  
x_|F|9  
while(top>0){ ":3 VJ(eY  
int j=stack[top--]; r3rxC&  
int i=stack[top--]; drwgjLC+  
3\;27&~gV  
pivotIndex=(i+j)/2; x{ }z ;yG  
pivot=data[pivotIndex]; v6\F Q9|t  
9dh >l!2  
SortUtil.swap(data,pivotIndex,j); (J"T]-[  
I|$ RJkD  
file://partition A$g+K,.l  
l=i-1; G1 o70  
r=j; :`) ~-`_  
do{ *=Z26  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); PN+G:Qv  
SortUtil.swap(data,l,r); hl&-\dc+  
} g/=K.  
while(l SortUtil.swap(data,l,r); }Vu\(~  
SortUtil.swap(data,l,j); 6I_Hd>4  
N?dvuB  
if((l-i)>THRESHOLD){ ^BZkHAp  
stack[++top]=i; bU 63X={  
stack[++top]=l-1; ')S;[=v  
} vhr+g 'tf  
if((j-l)>THRESHOLD){ 5W =(+Q>C  
stack[++top]=l+1; ~{>?*Gd&T  
stack[++top]=j; t"j|nz{m  
} B@Nt`ky0*  
h?\2 _s  
} b=a!j=-D  
file://new InsertSort().sort(data); ea=83 Zj  
insertSort(data); 'cDx{?  
} cD1o"bq  
/** &$`hQgi  
* @param data ihT~xt  
*/ URcR  
private void insertSort(int[] data) { %[<Y9g,:Q  
int temp; y%]8'q$  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); a=GM[{og  
} gJ2 H=#M  
} (kTXP_  
} 64Gi8|P  
vAP{;Q0 i  
} <I;*[;AK  
U3vEdw<lV  
归并排序: YEjY8]t  
z1 i &Ge  
package org.rut.util.algorithm.support; (B>Zaro#  
0@1:M  
import org.rut.util.algorithm.SortUtil; F)$K  
u}9fj  
/** SN+ S6  
* @author treeroot +?RGta'%k  
* @since 2006-2-2 @E`?<|B}  
* @version 1.0 -jg (GGJ  
*/ MQ][mMM;w  
public class MergeSort implements SortUtil.Sort{ j&6 jRX  
&;H{cv`  
/* (non-Javadoc) 2^exL h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &A!KJ.  
*/ BH0!6Oq  
public void sort(int[] data) { F>|9 52  
int[] temp=new int[data.length]; {F*N=pSq  
mergeSort(data,temp,0,data.length-1); ;Hm'6TR!  
} rqCa 2  
wCZO9sU:6=  
private void mergeSort(int[] data,int[] temp,int l,int r){ QL"gWr`R  
int mid=(l+r)/2; D_|B2gdZY  
if(l==r) return ; hQJWKAf,/  
mergeSort(data,temp,l,mid); >Pe:I  
mergeSort(data,temp,mid+1,r); P#GD?FUc  
for(int i=l;i<=r;i++){ AZFWuPJo  
temp=data; |U[y_Y\a  
} Pn TZ/|  
int i1=l; d+z[\i  
int i2=mid+1; urY`^lX~  
for(int cur=l;cur<=r;cur++){ o%(bQV-T  
if(i1==mid+1) /L) 9tt.  
data[cur]=temp[i2++]; MQcE6)  
else if(i2>r) ]>:^d%n,}  
data[cur]=temp[i1++]; ;np_%?is  
else if(temp[i1] data[cur]=temp[i1++]; i8V0Ty4~N  
else ]S8LY.Az5  
data[cur]=temp[i2++]; CKARg8o  
} 6i@ub%qq  
} 4 9w=kzo  
YaFcz$GE_  
} -oBI+v&  
AfWl6a?T8:  
改进后的归并排序: rFag@Z"["  
 :q2YBa  
package org.rut.util.algorithm.support; K, (65>86;  
993d/z|DX  
import org.rut.util.algorithm.SortUtil; f==*"?6\  
;cSGlE |  
/** GXb47_b^  
* @author treeroot `ypL]$cW  
* @since 2006-2-2 Md(JIlh3  
* @version 1.0 q&M:17+:Q  
*/ K_-MkY?+  
public class ImprovedMergeSort implements SortUtil.Sort { =mrY/ :V  
LZWS^77  
private static final int THRESHOLD = 10; |Mg }2!/L  
6zYaA  
/* (:?&G9k "  
* (non-Javadoc) 'tWAuI  
* o<4D=.g7D  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y/4ny,s"  
*/ WEa>)@  
public void sort(int[] data) { (-(*XNC  
int[] temp=new int[data.length]; H/i<_LP  
mergeSort(data,temp,0,data.length-1); <Ry $7t,  
} u7k|7e=xk  
&G{2s J5{  
private void mergeSort(int[] data, int[] temp, int l, int r) { yKDZ+3xK]  
int i, j, k; sMi{"`37  
int mid = (l + r) / 2; $v&C@l \  
if (l == r) |QYZRz  
return; jKt-~:  
if ((mid - l) >= THRESHOLD) &tBA^igXK  
mergeSort(data, temp, l, mid);  R<&FhT]  
else [,7-w  
insertSort(data, l, mid - l + 1); nUqy1(  
if ((r - mid) > THRESHOLD) )Xno|$b5Eo  
mergeSort(data, temp, mid + 1, r); '0Zm#g  
else XV2=8#R  
insertSort(data, mid + 1, r - mid); jfSg){  
1p CkWe  
for (i = l; i <= mid; i++) { 7zI5PGWw  
temp = data; V<-htV  
} rbh[j@s@  
for (j = 1; j <= r - mid; j++) { zUQe0Gc.b^  
temp[r - j + 1] = data[j + mid]; ]C)|+`XE@  
} t-lv|%+8  
int a = temp[l]; :Y.e[@!1x  
int b = temp[r]; ~L){O*Z  
for (i = l, j = r, k = l; k <= r; k++) { TSXTc'  
if (a < b) { .}p|`3$P  
data[k] = temp[i++]; v |ifI  
a = temp; IO[^z v4F  
} else { u{+!& 2}k  
data[k] = temp[j--]; 6^ik|k|  
b = temp[j]; DQ5W6W  
} <3Fz>}V32  
} l:z };  
} FQ##397  
7:kCb[ji"  
/** ;Vo mFp L  
* @param data ]^ !}*  
* @param l T&4fBMBp,%  
* @param i I7bi@t  
*/ Cgo XZX  
private void insertSort(int[] data, int start, int len) { L<E/,IdE  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); poY8 )2  
} qL>v&Rd<  
} ++k J\N{  
} ]-EN/V  
} _Y7:!-n}   
x:C@)CAr  
堆排序: \P?--AI q<  
t[j9R#02?  
package org.rut.util.algorithm.support; Wbd_a R (  
"s;ci~$  
import org.rut.util.algorithm.SortUtil; }#|2z}!  
Re\o v x9  
/** }6@%((9E 2  
* @author treeroot W+/2c4$F3  
* @since 2006-2-2  h.D^1  
* @version 1.0 r"[L0Cbb  
*/ fr]Hc+7  
public class HeapSort implements SortUtil.Sort{ UhBz<>i;!  
'v+96b/;  
/* (non-Javadoc) /=- h:0{M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8'% +G  
*/ "Y(%oJS]D  
public void sort(int[] data) { rxArTpS{.#  
MaxHeap h=new MaxHeap(); =ty2_6&>  
h.init(data); Hq-v@@0 *  
for(int i=0;i h.remove(); i2U/RXu  
System.arraycopy(h.queue,1,data,0,data.length); E]?2!)mgce  
} d~,n_E$q;  
yW:AVqE)t  
private static class MaxHeap{ e~*S4dKR  
Ss+F9J  
void init(int[] data){ LiF.w:}  
this.queue=new int[data.length+1]; ^Wk0*.wg  
for(int i=0;i queue[++size]=data; XC2Q*Z  
fixUp(size); ]Qc: Zy3  
}  X)y*#U  
} MKe *f%  
I'P.K| "R  
private int size=0; fW[_+r]  
?Cc$]  
private int[] queue; x;*VCs  
lvG3<ls0K$  
public int get() { . *Z#cq0  
return queue[1]; F-i&M1 \_  
} 78gob&p?  
eNivlJ,K|@  
public void remove() { <%(f9j  
SortUtil.swap(queue,1,size--); i'9e K O  
fixDown(1); 7~L|;^(  
} %va[jJ  
file://fixdown U <|B7t4M  
private void fixDown(int k) { "hfw9Qm  
int j; 4bWfx _0W  
while ((j = k << 1) <= size) { }el,^~  
if (j < size %26amp;%26amp; queue[j] j++; &4[<F"W>47  
if (queue[k]>queue[j]) file://不用交换 `c>A >c|  
break; Aw5K3@Ltz  
SortUtil.swap(queue,j,k); J511AoQ{R  
k = j; x[Hhj'  
} ;Xz(B4N~o  
} aTi0bQW{  
private void fixUp(int k) { `yy%<&  
while (k > 1) { <'VA=orD  
int j = k >> 1; >&g2 IvDS  
if (queue[j]>queue[k]) 0;'j!`l9  
break; ))$ CEh"X  
SortUtil.swap(queue,j,k); *?s/Ho &'  
k = j; (1OW6xtfG  
} ;k-g _{M  
} 5BZ+b_A>VV  
EwC5[bRjUp  
} }`?7\\6  
IwOfZuS  
} tP -5  
% 1OC#&  
SortUtil: hwc:@'  
1mAUEQ!  
package org.rut.util.algorithm; Al)lWD}j2g  
}7otuO(pRo  
import org.rut.util.algorithm.support.BubbleSort; se }pdL}  
import org.rut.util.algorithm.support.HeapSort; T,A!5V>cX  
import org.rut.util.algorithm.support.ImprovedMergeSort; 5R& x{jf$  
import org.rut.util.algorithm.support.ImprovedQuickSort; & %@/Dwr  
import org.rut.util.algorithm.support.InsertSort; RT1{+:l  
import org.rut.util.algorithm.support.MergeSort; !>?4[|?n<  
import org.rut.util.algorithm.support.QuickSort; JvT %R`i  
import org.rut.util.algorithm.support.SelectionSort; N;e}dwh&  
import org.rut.util.algorithm.support.ShellSort; /vMQF+  
jo]m1 2ps  
/** )j$b9ZBk  
* @author treeroot p|xs|O6{  
* @since 2006-2-2 J{a Q1)  
* @version 1.0 x;<oaT$X  
*/ [%HYh7ua<  
public class SortUtil { ' }y]mFpF  
public final static int INSERT = 1; )zo#1$C-  
public final static int BUBBLE = 2; y^5T/M  
public final static int SELECTION = 3; oNh68ON:c  
public final static int SHELL = 4; 7uWJ6Wk  
public final static int QUICK = 5; \H},ou U  
public final static int IMPROVED_QUICK = 6; B4PW4>GF  
public final static int MERGE = 7; g/fp45s  
public final static int IMPROVED_MERGE = 8; ly9x1`?$  
public final static int HEAP = 9; i7Y s_8A"9  
BXagSenc  
public static void sort(int[] data) { <>ZBW9  
sort(data, IMPROVED_QUICK); o6`Y7,]  
} 3RBpbTNWp  
private static String[] name={ N[- %0  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z_5rAlnwT.  
}; WV5r$   
|_xZ/DT  
private static Sort[] impl=new Sort[]{ ]b5%?^Z#  
new InsertSort(), m~A[V,os  
new BubbleSort(), R (+h)#![  
new SelectionSort(), =vB]*?;9  
new ShellSort(), PT 0Qzg  
new QuickSort(), F5 :2TEA  
new ImprovedQuickSort(), T)$ 6H}[c  
new MergeSort(), Z1XUYe62  
new ImprovedMergeSort(), R!:eYoQ  
new HeapSort() OqAh4qa,$  
}; ]<&B BQ  
@]?? +f}#  
public static String toString(int algorithm){ :mCw.Jz<h  
return name[algorithm-1]; C}dKbs^g|  
} \;A50U|r  
}z9I`6[  
public static void sort(int[] data, int algorithm) { a>;3 j  
impl[algorithm-1].sort(data); ]{q- Y<{"  
} Y^*Lh/:h  
A&X  
public static interface Sort { %OezaNOtm  
public void sort(int[] data); duZ|mT8Q==  
} r_qncy,F  
^=4I|+P,6.  
public static void swap(int[] data, int i, int j) { {ziYd;Ys1  
int temp = data; =rf )yp-D  
data = data[j]; ^VM"!O;h{  
data[j] = temp; o>/uW8  
} s= -WB0E  
} i} NkHEK  
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