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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。 y.'5*08S0  
插入排序: _R?:?{r,  
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package org.rut.util.algorithm.support; u= u#6%  
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import org.rut.util.algorithm.SortUtil; bW9a_myE  
/** -l# h^  
* @author treeroot orcPKCz|"  
* @since 2006-2-2 FV->226o%  
* @version 1.0 !.nyIA(  
*/ Fs,#d%4@%  
public class InsertSort implements SortUtil.Sort{ aV9QIH~  
$ 3/G)/A  
/* (non-Javadoc) i)pAFv<$,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  A/zZ%h  
*/ Rt^~db  
public void sort(int[] data) { @1UC9}>  
int temp; /) Pf ]  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); e0ea2 2  
} 7"c^$fj  
} x&SG gl  
} !leLOi2T  
O4mSr{HCp  
} oju}0h'1  
W"a%IO%'  
冒泡排序: 3+j!{tJ z2  
lSu\VCG  
package org.rut.util.algorithm.support; B]o5 HA<k  
gISG<!+X^  
import org.rut.util.algorithm.SortUtil; "DniDA  
Jbrjt/OG#I  
/** u\9t+wi}<  
* @author treeroot '%2q'LqSA  
* @since 2006-2-2 CPto?=*A  
* @version 1.0 >*A"tk#oR  
*/ O_u2V'jy9  
public class BubbleSort implements SortUtil.Sort{ FXi"o $N  
~F ,mc.  
/* (non-Javadoc) -J$,W`#z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X_6h8n}i  
*/ \ LQ?s)~  
public void sort(int[] data) { 6!eI=h2P  
int temp; &r)i6{w81  
for(int i=0;i for(int j=data.length-1;j>i;j--){ N^{"k,vB-  
if(data[j] SortUtil.swap(data,j,j-1); <oc"!c;T  
} xElHYh(\  
} :Rq>a@Rp  
} 5w# Ceg9  
} ?=22@Q}g  
I}&`IUP  
} srbU}u3VZ  
E mUA38  
选择排序: =68CR[H  
+NH#t} .  
package org.rut.util.algorithm.support; tS2Orzc>,  
bh9!OqK9K  
import org.rut.util.algorithm.SortUtil; Ch~2w)HAA  
dZ1/w0<M2  
/** rX-V0  
* @author treeroot 0pYCh$TL1  
* @since 2006-2-2 z)Is:LhS  
* @version 1.0 QR+{Yp  
*/ |V 3AA   
public class SelectionSort implements SortUtil.Sort { {g%F 3-  
{Gd<+tQg  
/* _qZ?|;o^  
* (non-Javadoc) :slVja$e  
* -/k;VT|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H1alf_(_ \  
*/ h]6"~ m  
public void sort(int[] data) { -jv%BJJlX  
int temp; Z uh!{_x;  
for (int i = 0; i < data.length; i++) { / p_mFA]@  
int lowIndex = i; U',9t  
for (int j = data.length - 1; j > i; j--) { [M7&  
if (data[j] < data[lowIndex]) { ? ^E B"{  
lowIndex = j; Y ~|C]O  
} Y_H|Fl^  
} a<W[???m/M  
SortUtil.swap(data,i,lowIndex); 1h"CjOp,7  
} Q9UBxpDV:  
} :2qUel\PEC  
-27uh  
} Dd(#   
VeJM=s.y7  
Shell排序: w}OJ2^  
&_L FV@/  
package org.rut.util.algorithm.support; C1/<t)^  
eC9nOwp]xH  
import org.rut.util.algorithm.SortUtil; h;^H*Y&`  
2W}f|\8MX  
/** M7\; Y  
* @author treeroot @dy<=bh~  
* @since 2006-2-2 _* xjG \!  
* @version 1.0 ,}("es\b  
*/ (#dwIBBFt  
public class ShellSort implements SortUtil.Sort{ F|eKt/>e  
kiW|h)w_,v  
/* (non-Javadoc) ]/o0p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tP?pN]Q$,  
*/ t3~ZGOn  
public void sort(int[] data) { <`B4+:;w6  
for(int i=data.length/2;i>2;i/=2){ |Ew~3-u!  
for(int j=0;j insertSort(data,j,i); ^* xhbM;  
} d:U2b"k=/u  
} YPjjSi:#  
insertSort(data,0,1); K%XQdMv  
} $yZ(c#L  
; W/K7}  
/** \Bg;^6U  
* @param data ),G?f {`!  
* @param j jkPye{j  
* @param i muAI$IRR   
*/ @E(_H$|E  
private void insertSort(int[] data, int start, int inc) { (5^bU<  
int temp; 6vx0F?>_  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); +YL9gNN>P  
} ZQZBap"  
} =~OH.=9\  
} NA%(ZRSg(  
S(K}.C1x  
} '8au j  
<.DFa/G   
快速排序: kl0!*j  
;3nR_6\  
package org.rut.util.algorithm.support; q'07  
)zFPf]gz  
import org.rut.util.algorithm.SortUtil; &8l"Dl  
n/ \{}9   
/** ,qx;kJJ  
* @author treeroot 9]ga\>v  
* @since 2006-2-2 (8[etm  
* @version 1.0 ;*3OkNxa3  
*/ l5> H\  
public class QuickSort implements SortUtil.Sort{ JGJXV3AT  
=F(fum;zH  
/* (non-Javadoc) qjK'sge/  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eV?._-G  
*/ i2a""zac  
public void sort(int[] data) { D{Zjo)&tF'  
quickSort(data,0,data.length-1); mfYY?]A*+  
} )1PZ#  
private void quickSort(int[] data,int i,int j){ .RI{\i`  
int pivotIndex=(i+j)/2; j k%MP6  
file://swap /rKdxsI*  
SortUtil.swap(data,pivotIndex,j); 2wHvHH!  
J>I.|@W4  
int k=partition(data,i-1,j,data[j]); C q/936`O  
SortUtil.swap(data,k,j); Q7 dXTS4H  
if((k-i)>1) quickSort(data,i,k-1); Im NTk  
if((j-k)>1) quickSort(data,k+1,j); -~nU&$ccL  
&"D *  
} jTo-xP{lC  
/** {uurM` f}:  
* @param data P1<Y7 +n  
* @param i (*.t~6c?5  
* @param j Kt(Z&@  
* @return :UjF<V  
*/ PT9,R^2T!  
private int partition(int[] data, int l, int r,int pivot) { C~16Jj:v  
do{ =%p%+F@RlW  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 9#:b+Amzz  
SortUtil.swap(data,l,r); ! xU1[,9  
} ]et4B+=i  
while(l SortUtil.swap(data,l,r); N;<.::x  
return l; d?j_L`?+  
} ~0mO<0~  
)c'5M]V  
} Ca: jN0  
x%acWeV5  
改进后的快速排序: *Q?ZJS ~  
CM}1:o<<N  
package org.rut.util.algorithm.support; fl{wF@C6  
o gcEv>0  
import org.rut.util.algorithm.SortUtil; 8PWx>}XPt  
=")}wl=s  
/** <A"T_Rk  
* @author treeroot 7Z-'@m  
* @since 2006-2-2 ? o@5PL  
* @version 1.0 A!([k}@=j  
*/ ;Up'+[Vj'C  
public class ImprovedQuickSort implements SortUtil.Sort { ~m ,xG  
ZI'MfkEZ*  
private static int MAX_STACK_SIZE=4096; A]fN~PR  
private static int THRESHOLD=10; 7j9:s>D  
/* (non-Javadoc) l 8I`%bu  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gW{<:6}!*  
*/ YCJ6an  
public void sort(int[] data) { ^DL}J>F9G  
int[] stack=new int[MAX_STACK_SIZE]; }GIwYh/  
UL81x72O  
int top=-1; mv7><C  
int pivot; OnNWci|7  
int pivotIndex,l,r; #~A(%a  
m).S0  
stack[++top]=0; QvM+]pdR6  
stack[++top]=data.length-1; (=v :@\r  
` u#'  
while(top>0){ V SJGp`  
int j=stack[top--]; tb^8jC  
int i=stack[top--]; Eei"baw/  
sFqLxSo_I  
pivotIndex=(i+j)/2; 1Sk=;Bic  
pivot=data[pivotIndex]; l(-We.:(  
C- Aiv@@<=  
SortUtil.swap(data,pivotIndex,j); :]EAlaB4Q  
'j^A87\M_  
file://partition up[9L|  
l=i-1; z 6~cm6j  
r=j; \)\uAI-  
do{ LRF_w)^['  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));  %2 A-u  
SortUtil.swap(data,l,r); fE1B1j<  
} q=NI}k  
while(l SortUtil.swap(data,l,r); P5u Y1(  
SortUtil.swap(data,l,j); >s 4"2X  
U(lcQC`$  
if((l-i)>THRESHOLD){ J~=bW\^I  
stack[++top]=i; +_.k\CRms  
stack[++top]=l-1; :}QBrd  
} BCDmce`=l  
if((j-l)>THRESHOLD){ $XBn:0U  
stack[++top]=l+1; tUS)1*{_  
stack[++top]=j; ]V|rOtxb  
} 3 [R<JrO  
H .F-mm  
} }ll&qb  
file://new InsertSort().sort(data); W'aZw9  
insertSort(data); UKYQ @m  
} F32N e6Y6"  
/** 8v$ 2*$  
* @param data XJx$HM&0M  
*/ $uw[X  
private void insertSort(int[] data) { DtXQLL*fl(  
int temp;  =fJDFg  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); !Zo we*`  
} (mO{ W   
} j_` [Z  
} s}2TJa  
D{-h2=V  
} RMinZ}/  
#w%d  
归并排序: bsfYz  
G.2\Sw  
package org.rut.util.algorithm.support; pbfIO47ZC  
f`r o {p  
import org.rut.util.algorithm.SortUtil; [I*)H7pt}  
w %4SNR  
/** p>4tPI}bf  
* @author treeroot Rm@#GP`  
* @since 2006-2-2 *QKxrg  
* @version 1.0 ]!7 %)  
*/ ?]*WVjskE  
public class MergeSort implements SortUtil.Sort{ 06ndW9>wD)  
0c2O'&$au  
/* (non-Javadoc) U0%T<6*H  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [/h3HyZ.  
*/ 9v\x&h  
public void sort(int[] data) { vY 0EffZ  
int[] temp=new int[data.length]; 0P{^aSxTP  
mergeSort(data,temp,0,data.length-1); U2v;[>=]  
} Nk.m$  
$|kq{@<  
private void mergeSort(int[] data,int[] temp,int l,int r){ ^Rr!YnEN  
int mid=(l+r)/2;  ?cG~M|@  
if(l==r) return ; 2C6o?*RjyY  
mergeSort(data,temp,l,mid); mLEJt,X  
mergeSort(data,temp,mid+1,r); v'Y0|9c  
for(int i=l;i<=r;i++){ s$%t*T2J>  
temp=data; Ro}7ERA  
} ~]sj.>P  
int i1=l; nt 9LBea  
int i2=mid+1; zd%n)jlwR  
for(int cur=l;cur<=r;cur++){ :B^YK].  
if(i1==mid+1) X;e=d+pw  
data[cur]=temp[i2++]; A-n@:` n~  
else if(i2>r)  Mi>!  
data[cur]=temp[i1++]; ZmLA4<  
else if(temp[i1] data[cur]=temp[i1++]; pZE}<EX  
else QN4{xf:}S  
data[cur]=temp[i2++]; BlLK6"gJT  
} /9SEW!E  
} Y ~TR`y  
Z\YCjs%  
} B$=oU   
/)%$xi  
改进后的归并排序: P O*;V<^  
k.."_ 4  
package org.rut.util.algorithm.support; _4#Mdnh}[  
CpE LLA<  
import org.rut.util.algorithm.SortUtil; (DLk+N4UHA  
?-Qq\D^+  
/** `EXo=Dqc  
* @author treeroot f|v5i tO2  
* @since 2006-2-2 C Oc,  
* @version 1.0 $_cO7d  
*/ *VUD!`F  
public class ImprovedMergeSort implements SortUtil.Sort { H=/;  
J-UqH3({Z,  
private static final int THRESHOLD = 10; 0 ~a9gBG  
00 9[`Z  
/* XRl!~Y|  
* (non-Javadoc) 9QXBz=Fnf  
* +YJpVxYmZ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HXeX !  
*/ +g9C klJ  
public void sort(int[] data) { Exb?eHO  
int[] temp=new int[data.length]; q`Rc \aWB%  
mergeSort(data,temp,0,data.length-1); .](~dVp%~  
} @u>:(9bp  
(DIMt-wz  
private void mergeSort(int[] data, int[] temp, int l, int r) { whW% c8  
int i, j, k; ts:YJAu+F  
int mid = (l + r) / 2; Jkx_5kk/\  
if (l == r) r"_U-w  
return; ^g'P H{68  
if ((mid - l) >= THRESHOLD) 5i0vli /L  
mergeSort(data, temp, l, mid); ]/#3 P  
else yI{4h $c  
insertSort(data, l, mid - l + 1); `o4%UkBpM  
if ((r - mid) > THRESHOLD) ykS-5E`  
mergeSort(data, temp, mid + 1, r); .A Dik}o  
else *^3&Y@  
insertSort(data, mid + 1, r - mid); JBI>D1`"  
)MWbZAI  
for (i = l; i <= mid; i++) { Fv} Uq\v[  
temp = data; 8{- *Q(=/  
} V;LV),R?  
for (j = 1; j <= r - mid; j++) {  &*Z"r*  
temp[r - j + 1] = data[j + mid]; 8C=8Wjm  
} u|+Dqe`  
int a = temp[l]; 9dO. ,U*`  
int b = temp[r]; Xk(p:^ R  
for (i = l, j = r, k = l; k <= r; k++) { uPVO!`N3  
if (a < b) { &SW~4{n:  
data[k] = temp[i++]; ]<BT+6L  
a = temp; c }7gHud  
} else { 8U)*kmq  
data[k] = temp[j--]; 1>=]lMW  
b = temp[j]; zq'KX/o  
} mhgvN-? "h  
} WkMB  
} Ew )1O9f  
 GUps\:ss  
/** j a'_syn  
* @param data 3kavzB[  
* @param l `D?  &)Y  
* @param i Oj>;[O"  
*/ cB6LJ}R  
private void insertSort(int[] data, int start, int len) { A~ @x8  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?$6(@>`f&t  
} `hDH7u!U.  
} w\1K.j=>|N  
} \gGTkH  
} )@],0yL  
f2 ?01PM,Q  
堆排序: U E-1p  
";Q}Gs}  
package org.rut.util.algorithm.support; }_oQg_-7e  
'd]t@[#  
import org.rut.util.algorithm.SortUtil; ,0@QBr5P  
eWr2UXv$  
/** pwVaSnre`  
* @author treeroot l^2m7 7)  
* @since 2006-2-2 =J`M}BBx  
* @version 1.0 g*;z V i  
*/ - WQ)rz  
public class HeapSort implements SortUtil.Sort{ bh+m_$X~  
XZ:6A]62I  
/* (non-Javadoc) y9~:[jB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9vBW CCf  
*/ };g<|v*o  
public void sort(int[] data) { L=gG23U&  
MaxHeap h=new MaxHeap(); lv#L+}T  
h.init(data); "}2I0tM  
for(int i=0;i h.remove(); *-&+;|mM  
System.arraycopy(h.queue,1,data,0,data.length); _q}^#-  
} Q[9W{l+  
_~ 3r*j  
private static class MaxHeap{ p2hPLq  
zFr#j~L"  
void init(int[] data){ v}.~m)  
this.queue=new int[data.length+1]; Lb~' I=9D  
for(int i=0;i queue[++size]=data; %GGSd0 g  
fixUp(size); ]] T,;|B  
} |<JBoE]3B  
} MaZVGrcC  
hVNT  
private int size=0; ,MUgww!.  
!`dMTW  
private int[] queue; I7+yu>  
-YS9u [   
public int get() { Pk&$ #J_  
return queue[1]; jEm =A8q  
} juQ?k xOB  
yJdkDVxYr  
public void remove() { h7PIF*7m e  
SortUtil.swap(queue,1,size--); >$7{H]  
fixDown(1); Hq|{Nt%Q  
} }?*$AVs2q  
file://fixdown 'VV"$`Fu"  
private void fixDown(int k) { <CWOx&hr  
int j; 2p~G][  
while ((j = k << 1) <= size) { @2sr/gX^  
if (j < size %26amp;%26amp; queue[j] j++; 71Y3.1+  
if (queue[k]>queue[j]) file://不用交换 _ Gkb[H&RZ  
break; U.1&'U*  
SortUtil.swap(queue,j,k); v!#koqd1y.  
k = j; _$yS4=.  
} @v/ 8}n  
} |`d-;pk!%  
private void fixUp(int k) { 'M fVZho{  
while (k > 1) { 8peK[sz  
int j = k >> 1; 9O\yIL  
if (queue[j]>queue[k]) /d> Jkv  
break; *JO%.QNg  
SortUtil.swap(queue,j,k); '`&b1Rc  
k = j; G@U}4' V9  
} 91UC>]}H  
} $\L=RU!c}  
j07b!j:"\}  
} } a!HbH  
cHJ4[x=  
} L$?YbQo7  
A~;+P  
SortUtil: 2>)::9e4  
P}vk5o'  
package org.rut.util.algorithm; Ki(0s  
IO"q4(&;P4  
import org.rut.util.algorithm.support.BubbleSort; yY!@FGsA  
import org.rut.util.algorithm.support.HeapSort; o4,9jk$  
import org.rut.util.algorithm.support.ImprovedMergeSort; &(NW_ <(  
import org.rut.util.algorithm.support.ImprovedQuickSort; 'JJ :  
import org.rut.util.algorithm.support.InsertSort; of>H&G)@  
import org.rut.util.algorithm.support.MergeSort; B-wF1! Jv  
import org.rut.util.algorithm.support.QuickSort; V=E5pB`Pr  
import org.rut.util.algorithm.support.SelectionSort; Vg7BK%  
import org.rut.util.algorithm.support.ShellSort; {*X|)nr  
< fYcON  
/** fz rH}^  
* @author treeroot :MGIp%3  
* @since 2006-2-2 oTveY  
* @version 1.0 0+k=gO  
*/ ~sTn?~  
public class SortUtil { oot kf=  
public final static int INSERT = 1; 1$ENNq#0  
public final static int BUBBLE = 2; -Zqw[2Q4  
public final static int SELECTION = 3; c@$W]o"A  
public final static int SHELL = 4; L"}2Y3  
public final static int QUICK = 5; S^r[%l<'n  
public final static int IMPROVED_QUICK = 6; .]/k#Hv  
public final static int MERGE = 7; ?}No'E1!I  
public final static int IMPROVED_MERGE = 8; ygxaT"3"=  
public final static int HEAP = 9; RggO|s+0;  
|&~);>Cq2  
public static void sort(int[] data) { wvH*<,8V q  
sort(data, IMPROVED_QUICK); ' &Tz8.jp~  
} n M `pnR_  
private static String[] name={ 7lAnGP.;  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q5.5%W  
}; ^geY Ay  
F ZN}T{<  
private static Sort[] impl=new Sort[]{ 5G=fJAG  
new InsertSort(), ZBjb f_M:  
new BubbleSort(), O*9d[jw[  
new SelectionSort(), IW=%2n(<1  
new ShellSort(), &7KX`%K"D  
new QuickSort(), rji<g>GQ  
new ImprovedQuickSort(), j#9n.i %h  
new MergeSort(), z=TuUl@  
new ImprovedMergeSort(), v&xhS yZ  
new HeapSort() zI_pP?4;.q  
}; SA~oGgk=P  
]C>h_,EZc  
public static String toString(int algorithm){ nz Klue  
return name[algorithm-1]; j^D/ ,SW  
} 7 ;x to =  
QPW+L*2  
public static void sort(int[] data, int algorithm) { sbV_h;<  
impl[algorithm-1].sort(data); g8]$BhRIfr  
} 4qyPjAG  
L]=LY  
public static interface Sort { Z )X(  
public void sort(int[] data); >n5Kz]]%  
} l'?(4 N  
q ;e/gP2  
public static void swap(int[] data, int i, int j) { @Dd3mWKq  
int temp = data; 1+Bj` ACP  
data = data[j]; YGZa##i  
data[j] = temp; !uhh_3RH  
} &izk$~  
} p9eTrFDy?  
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