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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。 d1AioQ9  
插入排序: /& Jan:  
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package org.rut.util.algorithm.support; ts\5uiB<%  
pEBM3r!X  
import org.rut.util.algorithm.SortUtil; \;qW 3~  
/** i;/5Y'KZ  
* @author treeroot X*/ho  
* @since 2006-2-2 f&BY/ n,  
* @version 1.0 Fl kcU `j  
*/ w<Wf?aG  
public class InsertSort implements SortUtil.Sort{ YG3J$_?y0  
'gC_)rK*  
/* (non-Javadoc) kCR_tn 4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o4m\~as)Y  
*/ k5:G-BQ:  
public void sort(int[] data) { H*ow\ Ct  
int temp; 'p> Ra/4  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); }001K  
} sf)EMh3Z  
} fZ0M%f  
} =G7m)!  
Si8pzd  
} }uJu>'1[G  
*5%d XixN  
冒泡排序: [x+FcXb  
+S>j0m<*  
package org.rut.util.algorithm.support; #$18*?tLv|  
cAY:AtD  
import org.rut.util.algorithm.SortUtil; d:BG#\e]v  
Yw^m  
/** wSa)*]%  
* @author treeroot oB}BU`-l  
* @since 2006-2-2 A#.edVj.g4  
* @version 1.0 ^ DaBz\  
*/ ^hc!FD  
public class BubbleSort implements SortUtil.Sort{ a1C{(f)  
c 0,0`+2~  
/* (non-Javadoc) {:6r;TB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,}3 'I [  
*/ /t+f{VX$  
public void sort(int[] data) { o /j*d3  
int temp; 7gf05Z'=  
for(int i=0;i for(int j=data.length-1;j>i;j--){ hQYL`Dni  
if(data[j] SortUtil.swap(data,j,j-1); D{GfL ib"U  
} \MyLc/Gh5  
} 11o.c;  
} }>>1<P<8-  
} 'u*D A|HC  
,:%CB"J  
} Xe$I7iKD  
RRmz"j>  
选择排序: B3We|oe!  
rDm~h~u5  
package org.rut.util.algorithm.support; 1oR7iD^  
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import org.rut.util.algorithm.SortUtil; X{5vXT\/y  
^q{9  
/** nyQ&f'<   
* @author treeroot wPQH(~k:  
* @since 2006-2-2 ]{3)^axW;  
* @version 1.0 .~~nUu+M  
*/ zr-*$1eu  
public class SelectionSort implements SortUtil.Sort { tXNm$Cq.|  
Cn,d?H  
/* g;pcZ9o  
* (non-Javadoc) iW$_zgN  
* d' !]ZWe  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RIlwdt  
*/ ns9U/ :L  
public void sort(int[] data) { /rK}?U  
int temp; uaT!(Y6  
for (int i = 0; i < data.length; i++) { SF7\<'4\N  
int lowIndex = i; 6n,i0W  
for (int j = data.length - 1; j > i; j--) { |:nn>E}ZA/  
if (data[j] < data[lowIndex]) { cz >V8  
lowIndex = j; /)YNs7gR  
} , ]bhyp  
} :ci5r;^  
SortUtil.swap(data,i,lowIndex); \hTm)-FP  
} &5\iM^  
} 6eLR2  
C[ NS kr  
} Lt u'W22  
?9!6%]2D  
Shell排序: ,)0H3t  
Bo)3!wO8  
package org.rut.util.algorithm.support; Rw"sJ)/  
nCUg ,;_=  
import org.rut.util.algorithm.SortUtil; v\c>b:AofD  
EAT"pxP  
/** N-G1h?e4  
* @author treeroot fT;s-v[`k  
* @since 2006-2-2 nEJq_  
* @version 1.0 ,f~J`3(&  
*/ qB5j;@ r  
public class ShellSort implements SortUtil.Sort{ gqZ'$7So  
y&6FybIz  
/* (non-Javadoc) `95r0t0hh\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) abuh`H#  
*/ fY{1F   
public void sort(int[] data) { WJQvB=D&  
for(int i=data.length/2;i>2;i/=2){ K18}W*$ d  
for(int j=0;j insertSort(data,j,i); bWH&P/>  
} `ZU($!(  
} /Gd=n  
insertSort(data,0,1); d(\%Os   
} Pr3qo4t.L  
{+ ][5<q  
/** urbp#G/>  
* @param data 51#_Vg  
* @param j vx1c,8  
* @param i '.on)Zd.  
*/ dzARI`  
private void insertSort(int[] data, int start, int inc) { J1,9kCO  
int temp; (/z_Q{"N  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); o2nv+fy W  
} o*b] p-  
} *QpMF/<?  
} xe]y]  
B;M?,<%FRU  
} rA3$3GLQ-  
Jb0`42  
快速排序: tRs [ YK  
p)jk>j B  
package org.rut.util.algorithm.support; rV2WnAb[H&  
-z-C*%~  
import org.rut.util.algorithm.SortUtil; *F+KqZ.2  
)P%ZA)l%_o  
/** lG9bLiFY  
* @author treeroot eX?OYDDC0j  
* @since 2006-2-2 Tl%`P_J)-S  
* @version 1.0 EMh7z7}Rr  
*/ ERUz3mjA/  
public class QuickSort implements SortUtil.Sort{ !02`t4Zc-  
~Y`ldL  
/* (non-Javadoc) ,`|3KE9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y<?kzt  
*/ 0g +7uGp:  
public void sort(int[] data) { l}a)ZeR1  
quickSort(data,0,data.length-1); Sxnpq Vbk  
} u__9Z:+  
private void quickSort(int[] data,int i,int j){ s(5Y  
int pivotIndex=(i+j)/2; P9GN}GN%v  
file://swap n D0K).=Q  
SortUtil.swap(data,pivotIndex,j); *M[?bk~~  
aI%g2 q0f  
int k=partition(data,i-1,j,data[j]); 9eGyyZg  
SortUtil.swap(data,k,j); 4qO+_!x{)  
if((k-i)>1) quickSort(data,i,k-1); GOj-)i/_  
if((j-k)>1) quickSort(data,k+1,j); ot,jp|N>f~  
QCD .YFM  
} EOIN^4V"  
/** cbNTj$'b2u  
* @param data q]\:P.x!>  
* @param i fX(3H1$"  
* @param j {'N Z.  
* @return ls_'')yp  
*/ O_2pIbh  
private int partition(int[] data, int l, int r,int pivot) { BHIRH mM<Y  
do{ Lco~,OE  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ~d o9;8v  
SortUtil.swap(data,l,r); Sj-n;F|=X  
} SAH-p*.  
while(l SortUtil.swap(data,l,r); 9`T)@Uj2n  
return l; HD@$t)mn  
} +dWDxguE{w  
Y4OPEo5o  
} (jnzT=y  
[/PR\'|  
改进后的快速排序: F<ZYh  
=qoWCmg"&  
package org.rut.util.algorithm.support; ls?~+\Jb  
uX"H4l O~  
import org.rut.util.algorithm.SortUtil; bh s5x  
dWM'fg  
/** szb_*)k  
* @author treeroot G|[=/>~B  
* @since 2006-2-2 2n,*Nd`  
* @version 1.0 ~De"?  
*/ +s"hqm  
public class ImprovedQuickSort implements SortUtil.Sort { m-%E-nr  
N/[p <  
private static int MAX_STACK_SIZE=4096; '@cANGg7[  
private static int THRESHOLD=10; kj|6iG  
/* (non-Javadoc) 6 +Sxr  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z F_M*8=  
*/ BIb4h   
public void sort(int[] data) { $Ad{Z  
int[] stack=new int[MAX_STACK_SIZE]; Eav[/cU  
-<c=US  
int top=-1; jTf@l?|  
int pivot; F;>V>" edl  
int pivotIndex,l,r; u~r=)His  
K#l:wH _  
stack[++top]=0; @+;$jRwq  
stack[++top]=data.length-1; @v$Y7mw3D  
;5wn67'  
while(top>0){ `Y+J-EQ  
int j=stack[top--]; :Gv1?M  
int i=stack[top--]; ~fBtQGdX  
w:??h4lt  
pivotIndex=(i+j)/2; IW)()*8;/  
pivot=data[pivotIndex]; LnFdhrB@x  
7WZrSC  
SortUtil.swap(data,pivotIndex,j); ,ZKr .`B  
LZ\q3 7UV  
file://partition MV! {j;g1<  
l=i-1; +cWLjPD/}  
r=j; !*/*8re  
do{ 'QG xd!4  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); cO-7ke  
SortUtil.swap(data,l,r);  |$+3a  
} xpNH?#&  
while(l SortUtil.swap(data,l,r); u=Fv 2  
SortUtil.swap(data,l,j); Om\o#{D  
ylUb9KusOx  
if((l-i)>THRESHOLD){ cy*?&~;  
stack[++top]=i; *EI6dD"  
stack[++top]=l-1; 5 VRYO"D:  
} /xG*,YL/q  
if((j-l)>THRESHOLD){ s J\BF  
stack[++top]=l+1; HPpR.  
stack[++top]=j; 7t3X)Ah  
} |VKK#J/  
#w;v0&p  
} rI{=WPI&WU  
file://new InsertSort().sort(data); +U:$(UV'A  
insertSort(data); z^KJ*E  
} _my"%@n  
/** w;D+y*2  
* @param data *RT>`,t/  
*/ 6~OoFm5  
private void insertSort(int[] data) { bf0+DvIB  
int temp; wWgWWXGT}  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 9K/HO!z  
} X#d~zk[r2  
} J2d.f}-  
} $v,dz_O*\  
yH7F''O7  
} 8][nmjk0  
X$%'  
归并排序: QU#w%|  
d^/3('H6  
package org.rut.util.algorithm.support; #1J &7F1  
Yi .u"sh]  
import org.rut.util.algorithm.SortUtil; {2qFY 5H  
BMhy=+\  
/** /{|EAd{  
* @author treeroot 832v"k CD  
* @since 2006-2-2 ,/[6e\0~  
* @version 1.0 k")R[)92b?  
*/ ADZ};:]  
public class MergeSort implements SortUtil.Sort{ 2*rH?dz8E  
( W a  
/* (non-Javadoc) Kfm5i Q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8'n/?.7cX  
*/ $ oTdfb  
public void sort(int[] data) { & SiP\65N  
int[] temp=new int[data.length]; SH3|sXH<  
mergeSort(data,temp,0,data.length-1); Z,`iO %W  
} -8'C\R|J+  
0?sRDYaX;c  
private void mergeSort(int[] data,int[] temp,int l,int r){ U93}-){m  
int mid=(l+r)/2; ygOd69  
if(l==r) return ; l;af~ef)'  
mergeSort(data,temp,l,mid); Ok>gh2e[c  
mergeSort(data,temp,mid+1,r); -g)9R%>-  
for(int i=l;i<=r;i++){ UU'|Xz9~  
temp=data; pqUCqo!m\  
} `J]fcE%T0R  
int i1=l; ,PlO8;5]  
int i2=mid+1; syk!7zfK  
for(int cur=l;cur<=r;cur++){ nv)2!mAh\  
if(i1==mid+1) )X04K~6lY  
data[cur]=temp[i2++]; :z}MIuf  
else if(i2>r) ag$Vgl  
data[cur]=temp[i1++]; .b\$MZ"(  
else if(temp[i1] data[cur]=temp[i1++]; 3Uqr,0$p  
else -r#X~2tPzD  
data[cur]=temp[i2++]; @vpf[j  
} Q=BZ N]g2  
} m#ZO`W  
U ?'vXa  
} y'FS/=u>0  
$\b$}wy*  
改进后的归并排序: ~jK{ ,$:=  
t(GR)&>.2  
package org.rut.util.algorithm.support; pp.6Ex (R  
x??pBhJH  
import org.rut.util.algorithm.SortUtil; ]DZE%  
{)DHH:n  
/** ktK_e  
* @author treeroot ~CtL9m3tO  
* @since 2006-2-2 iY`%SmB  
* @version 1.0 MWI4Y@1bS  
*/ |nbf'  
public class ImprovedMergeSort implements SortUtil.Sort { sBu=e7  
VmCW6 G#M  
private static final int THRESHOLD = 10; : q ti  
ii%+jdi.  
/* CL)lq)1(  
* (non-Javadoc) DKfE.p)  
* :}r.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uqM yoIc  
*/ f} Np/  
public void sort(int[] data) { vgD {qg@  
int[] temp=new int[data.length]; ,REJt  
mergeSort(data,temp,0,data.length-1); RlheQTJ  
} hOFOO_byzO  
I96C i2)m  
private void mergeSort(int[] data, int[] temp, int l, int r) { !h(|\" }  
int i, j, k; \(VTt|}By$  
int mid = (l + r) / 2; I6j$X6u  
if (l == r) ,QC{3i~  
return; ^F2b hXE  
if ((mid - l) >= THRESHOLD) 3k|oK'l  
mergeSort(data, temp, l, mid); cUqke+!  
else H_EB1"C;\  
insertSort(data, l, mid - l + 1);  |?Frj  
if ((r - mid) > THRESHOLD) 0E?jW7yr  
mergeSort(data, temp, mid + 1, r); YhbZ'SJ  
else *\(r+>*x*  
insertSort(data, mid + 1, r - mid); -6Oz^  
6&DX] [G  
for (i = l; i <= mid; i++) { i O/K nH  
temp = data; 9Rn? :B~W:  
} {n/uh0>f*  
for (j = 1; j <= r - mid; j++) { ; l&4V  
temp[r - j + 1] = data[j + mid]; I/M_p^  
} so)"4 SEu  
int a = temp[l]; jx.[#6e  
int b = temp[r]; MS>t_C(  
for (i = l, j = r, k = l; k <= r; k++) { rSxxH]-  
if (a < b) { Q?8R[i  
data[k] = temp[i++]; ^ "i l}8`  
a = temp; @o#!EfZyE  
} else { _9tK[ /h  
data[k] = temp[j--]; RletL)  
b = temp[j]; QYa(N[~a  
} @Ys!DScY,  
} !:|TdYrmj  
} y;t6sM@  
@[#$J0q q  
/** s <   
* @param data W?0 lV5/  
* @param l qb5#_1qz+^  
* @param i ysmNio  
*/ ?pYKZg /c  
private void insertSort(int[] data, int start, int len) { U7!.,kR-  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %|^OOU}  
} )x}l3\s  
} *<E]E?  
} 'xhcuVl  
} o;W`4S^  
$e\h}A6  
堆排序: 1z&Ly3  
cTD!B% x  
package org.rut.util.algorithm.support; uC8L\UXk  
Q:|l`*.R  
import org.rut.util.algorithm.SortUtil; K =C!b?  
oY1';&BO9  
/** rj6tZJZ#o0  
* @author treeroot Ma'_e=+A  
* @since 2006-2-2 =Zu^80/  
* @version 1.0 /n5F(5<  
*/ %q!8={J8  
public class HeapSort implements SortUtil.Sort{ T[,/5J  
FP0G]=ME  
/* (non-Javadoc) HDda@Jy  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {fha`i  
*/ pl5P2&k  
public void sort(int[] data) { Tneq6>  
MaxHeap h=new MaxHeap(); f6_];]yP  
h.init(data); Xcrk;!IB?  
for(int i=0;i h.remove(); pM{nh00[  
System.arraycopy(h.queue,1,data,0,data.length); Z.W66\8~}^  
} bHht d_}  
V?P,&c?84  
private static class MaxHeap{ ~by]xE1Eg  
UOGuqV-  
void init(int[] data){ <+^6}8-  
this.queue=new int[data.length+1]; 1iX)d)(b  
for(int i=0;i queue[++size]=data; Nru7(ag1~  
fixUp(size); G0`h%  
} #l4)HV  
} Kx. X7R  
MZpK~c1`  
private int size=0; Mmo6MZ^  
Q\GDrdA  
private int[] queue; K,6b3kk  
&K43x&mFF  
public int get() { uQ=^~K:Z~  
return queue[1]; )J_\tv  
} 26dUA~|KJ  
]J* ,g,  
public void remove() { \S*$UE]uG  
SortUtil.swap(queue,1,size--); ,bM-I2BR  
fixDown(1); ly4s"4v  
} P7 ]z  
file://fixdown ?;wpd';c  
private void fixDown(int k) { #Hvq/7a2R  
int j; I.Y['%8,5~  
while ((j = k << 1) <= size) { 1VF    
if (j < size %26amp;%26amp; queue[j] j++;  ],ZzI  
if (queue[k]>queue[j]) file://不用交换 j,t#B"hOnp  
break; CW)Z[<d8  
SortUtil.swap(queue,j,k); ~%/Wupf  
k = j; s-Aw<Q)d  
} :LWn<,4F&  
} RbGJ)K!  
private void fixUp(int k) { 9prU+9  
while (k > 1) { 4EXB;[ ]  
int j = k >> 1; rUlS'L;$"  
if (queue[j]>queue[k]) Cv>o.Bp|  
break; iweD @b  
SortUtil.swap(queue,j,k); 'S<%Xm  
k = j; CvPioi  
} ( 7ws{)  
} ^pS+/ZSi^  
!PMU O\y  
} ^9_U Uzf\  
c(U  
} [w0/\]o  
@v}B6j b;  
SortUtil: LuR,f"%2  
)jCo%P/  
package org.rut.util.algorithm; d'*]ns  
TgTnqR@/  
import org.rut.util.algorithm.support.BubbleSort; V $|<  
import org.rut.util.algorithm.support.HeapSort; WKr X,GF  
import org.rut.util.algorithm.support.ImprovedMergeSort; SVa6V}"Iv  
import org.rut.util.algorithm.support.ImprovedQuickSort; FZ|CqD"#  
import org.rut.util.algorithm.support.InsertSort; !@I}mQ ~  
import org.rut.util.algorithm.support.MergeSort; Uu"0rUzt  
import org.rut.util.algorithm.support.QuickSort; QN>7~=`  
import org.rut.util.algorithm.support.SelectionSort; rVtw-[p  
import org.rut.util.algorithm.support.ShellSort; @ct+7v~  
-ZW3  
/** .c^ ggy%  
* @author treeroot l;"Ab?P\  
* @since 2006-2-2 *9 Q^5;y  
* @version 1.0 O lfn  
*/ oyk>vIZ  
public class SortUtil { <e)o1+[w  
public final static int INSERT = 1; a`E*\O'd  
public final static int BUBBLE = 2; _Cy:]2o  
public final static int SELECTION = 3; #5&jt@NS  
public final static int SHELL = 4; .fzu"XAPu  
public final static int QUICK = 5; cBYfXI0`  
public final static int IMPROVED_QUICK = 6; Eq^uKi  
public final static int MERGE = 7; v8/6wy?  
public final static int IMPROVED_MERGE = 8; TwvAj#j  
public final static int HEAP = 9; a=xT(G0Re  
pilh@#_h  
public static void sort(int[] data) { EPX8Wwf  
sort(data, IMPROVED_QUICK); H@l}[hkP  
} F_ 7H!F  
private static String[] name={ 8ga_pNe  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \OC6M` /  
}; pO~c<d}b  
.> Z,uT^A  
private static Sort[] impl=new Sort[]{ F?u^"}%Fc  
new InsertSort(), y^Vw`-e  
new BubbleSort(), 1ndJ+H0H  
new SelectionSort(), w %c  
new ShellSort(), maSgRf[g  
new QuickSort(), J^m<*  
new ImprovedQuickSort(), 4'Xgk8)  
new MergeSort(), C;Ic  
new ImprovedMergeSort(), 7OVbP%n)d2  
new HeapSort() I,ci >/+b  
}; _2hXa!yO  
PfG`C5 d  
public static String toString(int algorithm){ ,WWj-X|+=  
return name[algorithm-1]; ]lS@}W\  
} Q0_>'sEM  
Ybg- "w  
public static void sort(int[] data, int algorithm) { yPu4T6Vv  
impl[algorithm-1].sort(data); PoShQR<  
} t~M $%)h  
OQ4c#V?  
public static interface Sort { -Dzsa  
public void sort(int[] data); f+Dn9t  
} .G>t72DpU  
=y%rG :!  
public static void swap(int[] data, int i, int j) { ] c}91  
int temp = data; JmOW~W  
data = data[j]; N;HIsOT}t  
data[j] = temp; fT Y/4(  
} !q4x~G0d  
} W9J1=  
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