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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。 cx?XJ)  
插入排序: /A3tY"Vn  
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package org.rut.util.algorithm.support; 3ZNm,{  
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import org.rut.util.algorithm.SortUtil; zUg-M  
/** STMc@MeZU_  
* @author treeroot HorFQ?8  
* @since 2006-2-2 L\L/+yNv:G  
* @version 1.0 Y`@:L'j  
*/ a4gJ-FE  
public class InsertSort implements SortUtil.Sort{ mSSDV0Pfn  
Obd@#uab  
/* (non-Javadoc) Y*-#yG9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [d="94Ab  
*/ <uUHr,#  
public void sort(int[] data) {  uY]nqb  
int temp; d` > '<  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); uW*)B_c  
} 5c?1JH62o8  
} h^E"eC  
} 2y6 e]D  
@ToY,@]e  
} }^).Y7{g[  
\v(}@zcB|  
冒泡排序: z:B4  
&6-udZB-  
package org.rut.util.algorithm.support; [R$iX  
@.Pd3CB0  
import org.rut.util.algorithm.SortUtil; s!* m^zx  
m22FOjk\  
/** &S/@i|_  
* @author treeroot I^h^QeBis  
* @since 2006-2-2 8]U;2H/z  
* @version 1.0 df}DJB  
*/  /="~Jo  
public class BubbleSort implements SortUtil.Sort{ #*QnO\.  
R pUq#Y:a  
/* (non-Javadoc) ]"Y? ZS;H  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CAX)AN  
*/ e nsou!l  
public void sort(int[] data) { X wvH  
int temp; |KF_h^  
for(int i=0;i for(int j=data.length-1;j>i;j--){ DEj6 ky  
if(data[j] SortUtil.swap(data,j,j-1); 6\jhDP@`9  
} ~I'1\1  
} N"A863>  
} ^Ec);Z  
} Gt >*y.]  
`cee tr=  
} luNEgCq  
q~QB?+ x&  
选择排序: x+niY;Z E  
.UJp#/EHs  
package org.rut.util.algorithm.support; %Z T@&  
rVo0H.+N)`  
import org.rut.util.algorithm.SortUtil; AUZ^XiK  
@3T)J,f  
/** vwA d6Tm  
* @author treeroot tGq0f"}'J  
* @since 2006-2-2 CKoRq|QG_  
* @version 1.0 :Kc9k(3&r  
*/ KmUH([#  
public class SelectionSort implements SortUtil.Sort { jIpc^iu`,  
&-l(nr]h]  
/* [FhFeW>  
* (non-Javadoc) EZICH&_  
* F#<$yUf%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q]n a_'_  
*/ Jat|n97$  
public void sort(int[] data) { pAZD>15l"  
int temp; ^5{M@o  
for (int i = 0; i < data.length; i++) { YzasT:EZN  
int lowIndex = i; ?H7YmN  
for (int j = data.length - 1; j > i; j--) { tv,Z>&OM  
if (data[j] < data[lowIndex]) { >m66j2(H*Z  
lowIndex = j; Gp&o  
} uH"W07  
} ;:2:f1_  
SortUtil.swap(data,i,lowIndex); > St]MS  
} &\w:jI44Bs  
} ]Ak/:pu  
x(r>iy  
} 3rRN~$  
57nSyd] PR  
Shell排序: P LHiQ:  
VB(S]N)F^  
package org.rut.util.algorithm.support; xna4W|-  
M.*3qWM  
import org.rut.util.algorithm.SortUtil; Hi V7  
;s$bVGHr  
/** zQPQP`  
* @author treeroot !Z0p94L  
* @since 2006-2-2 &_1Ivaen6  
* @version 1.0 vC j, aSW  
*/ T/9`VB%N  
public class ShellSort implements SortUtil.Sort{ p|q}z/  
sTmY'5ry  
/* (non-Javadoc) ggQBQ/ L  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N\f={O8E  
*/ zJxO\  
public void sort(int[] data) { [H-r0Ah  
for(int i=data.length/2;i>2;i/=2){ S(&]?!  
for(int j=0;j insertSort(data,j,i); jE.yT(+lW  
} =x QLf4>  
} krt8yAkG  
insertSort(data,0,1); CLn}BxgD  
} cVR#\OM  
4fuK pLA  
/** .#BWu(EYV  
* @param data GM{J3O=  
* @param j S|_}0  
* @param i U"0Ts!CABA  
*/ QP%*`t?  
private void insertSort(int[] data, int start, int inc) { 0Qa kFt  
int temp; KeIk9T13O  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); $h)VKW^\  
} <D1>;C  
} N.l\2S}  
} #JLxM/5^1~  
#("/ 1N6  
} |cBeyqr  
%XU V[L}  
快速排序: }}cS-p  
~8htg8CZ`  
package org.rut.util.algorithm.support; $%%K9Y  
/4Q^L>a  
import org.rut.util.algorithm.SortUtil; !.^%*6f  
u#>*"4Q  
/** (:TZ~"VY  
* @author treeroot _$f XK  
* @since 2006-2-2 *pZhwO !D  
* @version 1.0 |Nfi y  
*/ # $dk  
public class QuickSort implements SortUtil.Sort{ B(z?IW&  
j)vfI>  
/* (non-Javadoc) Z~WUILx,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J8>8@m6  
*/ REaU=-m-  
public void sort(int[] data) { xi!CZNz  
quickSort(data,0,data.length-1); g6wL\g{29  
} 6cm&=n_u  
private void quickSort(int[] data,int i,int j){ )q>mt/,  
int pivotIndex=(i+j)/2; [og_0;  
file://swap SZ*Nr=X  
SortUtil.swap(data,pivotIndex,j); F^xhhz&e  
:I)WSXP9h  
int k=partition(data,i-1,j,data[j]); /3>5ex>PN  
SortUtil.swap(data,k,j); Alh"ZT^*  
if((k-i)>1) quickSort(data,i,k-1); 2X@| H  
if((j-k)>1) quickSort(data,k+1,j); jIOrB}  
C@$!'^ 61  
} Te:4 z@?  
/** bL)7 /E  
* @param data 10C,\  
* @param i {~lVe GBp  
* @param j TS~>9h\;  
* @return js~?y|e8k  
*/ U11bQ4ak  
private int partition(int[] data, int l, int r,int pivot) { h\@\*Xz<v  
do{ SBNeN]  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); $^ wqoW%t  
SortUtil.swap(data,l,r); K< ;I*cAX  
} Xc!0'P0T  
while(l SortUtil.swap(data,l,r); qMj'%5/  
return l; :|P[u+v  
} NukcBH  
m,TN%*U!  
} 2A5R3x= \  
?m RGFS  
改进后的快速排序: 2c Pd$j  
LZ ?z5U:  
package org.rut.util.algorithm.support; 7 B<  
^V1iOf:  
import org.rut.util.algorithm.SortUtil; +Ui @3Q  
2^\67@9  
/** N"+o=nS  
* @author treeroot oXQzCjX_   
* @since 2006-2-2 ^^O @ [_  
* @version 1.0 iFypKpHg~  
*/ [lmghI!  
public class ImprovedQuickSort implements SortUtil.Sort { bGO[P<<  
5Q9nJC{'NN  
private static int MAX_STACK_SIZE=4096; G1vg2'A  
private static int THRESHOLD=10; !(-lY(x  
/* (non-Javadoc) .d4L@{V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~eVq Fc  
*/ \9Z1'W  
public void sort(int[] data) { YEg(QOn3Q  
int[] stack=new int[MAX_STACK_SIZE]; a___SYl 'K  
Vg>\@ C .s  
int top=-1; 6 G^x%s  
int pivot; ,k,RXgQ  
int pivotIndex,l,r; (pU@$H  
0pC}+ +  
stack[++top]=0; Al 0 i{.V  
stack[++top]=data.length-1; 5}pn5iI  
KliMw*5(  
while(top>0){ ]+!{^h$  
int j=stack[top--]; 0|D^_1W`R  
int i=stack[top--]; YM:;mX5B  
,"@Tm01os  
pivotIndex=(i+j)/2; ~$bkWb*RJ  
pivot=data[pivotIndex]; X q"_^  
/CE]7m,7~K  
SortUtil.swap(data,pivotIndex,j); 74h[YyVi  
=Fd!wkB'{  
file://partition "X.JD  
l=i-1; "L(4 EcO@  
r=j; j.b7<Vr4;  
do{ z`?{5v -Qs  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); HkP')= sa  
SortUtil.swap(data,l,r); D.i(Irqw!  
} C0eqC u)Q  
while(l SortUtil.swap(data,l,r); ZSBa+3;z  
SortUtil.swap(data,l,j); o/;kzi  
cEP!DUo  
if((l-i)>THRESHOLD){ u(Y! _  
stack[++top]=i; )t$<FP  
stack[++top]=l-1; +5zLQ>]z  
} \BoRYb9h  
if((j-l)>THRESHOLD){ i>]1E^yF  
stack[++top]=l+1; pq3W.7z;b  
stack[++top]=j; $RFy9(>  
} ]d}h`!:  
cJ}J4?  
} QM"\;l??  
file://new InsertSort().sort(data); \hm;p  
insertSort(data); \A{ [2  
} s!vvAD;\  
/** &gDwsW  
* @param data xb N)z  
*/ efc<lSUR  
private void insertSort(int[] data) {  .IO_&^  
int temp; vM.Y/,7S  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); j o7`DDb  
} 8|Q=9mmWOh  
} jGeil qPC  
} 56|o6-a^  
\),DW)  
} Y<x;-8)*  
Wk0"U V  
归并排序: jHU5>Gt-}  
/M0A9ZT[  
package org.rut.util.algorithm.support; p#]D-?CM)  
UdIl5P  
import org.rut.util.algorithm.SortUtil; 3:S>MFRn.3  
P,QI-,  
/** F+c4v A})  
* @author treeroot $X>$)U'p&-  
* @since 2006-2-2 8zOoVO  
* @version 1.0 >Q`\|m}x)Q  
*/ Dc2U+U(J  
public class MergeSort implements SortUtil.Sort{ Q^B !^_M  
fcim4dfP  
/* (non-Javadoc) LU7ia[T  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0LjF$3GpZ  
*/ ;cFlZGw   
public void sort(int[] data) { fMRv:kNAt  
int[] temp=new int[data.length]; 7,.3'cCL^  
mergeSort(data,temp,0,data.length-1); vFz#A/1  
} -MCDX^ >P  
!"G|y4O  
private void mergeSort(int[] data,int[] temp,int l,int r){ o>#ue<Bc6  
int mid=(l+r)/2; "f1`6cx6  
if(l==r) return ; d'x'hp%  
mergeSort(data,temp,l,mid); "1-gMob  
mergeSort(data,temp,mid+1,r); q2 pq~LI  
for(int i=l;i<=r;i++){ lCX*Q{s22  
temp=data; mPmg6Qj(W  
} Dh4 EP/=z  
int i1=l; BDO]-y  
int i2=mid+1; Qw,{"J  
for(int cur=l;cur<=r;cur++){ iB1+4wa  
if(i1==mid+1) \i2S'AblYq  
data[cur]=temp[i2++]; ~+HZQv3Y  
else if(i2>r) {SQ#n@Q&$  
data[cur]=temp[i1++]; 8F;r$i2  
else if(temp[i1] data[cur]=temp[i1++]; 5, j&-{ 0W  
else /}ADV2sF  
data[cur]=temp[i2++]; C<T)'^7z  
} 3jJd)C R  
} RyN}Gz/YN  
d,"6s=4(q  
} d4r@Gx%BE  
/Tc I  
改进后的归并排序: x+%(z8wD  
JDI1l_Ga  
package org.rut.util.algorithm.support; ,lUroO^^  
*oW^P~m/  
import org.rut.util.algorithm.SortUtil; hE9UWa.Q>  
#\{j/{VZ  
/** dB=aq34l  
* @author treeroot n{@^ne4 m  
* @since 2006-2-2 E[nJ'h<h  
* @version 1.0 kgQyG[u  
*/ Xh[02iL-  
public class ImprovedMergeSort implements SortUtil.Sort {  (H*EZ  
Or2J  
private static final int THRESHOLD = 10; "L)=Y7Dx  
.Jvy0B} B  
/* ,5 A&  
* (non-Javadoc) ~R$Ko(N  
* 4b}94e@(N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zg[.Pws:E  
*/ +Y9n@`  
public void sort(int[] data) { )d^b\On  
int[] temp=new int[data.length]; =a]B#uUn  
mergeSort(data,temp,0,data.length-1); 1k:s~m?!  
} ]CnqPLqL  
-IP3I  
private void mergeSort(int[] data, int[] temp, int l, int r) { X^% E"{!nU  
int i, j, k; p&O-]o8  
int mid = (l + r) / 2; JKMcdD?'  
if (l == r) /yd<+on^  
return; q]}1/JZS  
if ((mid - l) >= THRESHOLD) B|zVq=l~  
mergeSort(data, temp, l, mid); Lu6?$N57rC  
else -gzY ~a  
insertSort(data, l, mid - l + 1); c9<&+  
if ((r - mid) > THRESHOLD) %(v<aEQtt  
mergeSort(data, temp, mid + 1, r); ]ICBNJ  
else n#fc=L1U  
insertSort(data, mid + 1, r - mid); 0D=7Mef  
t%'0uB#v1  
for (i = l; i <= mid; i++) { `B GU  
temp = data; bpv?$j-j  
} ,iYKtS3  
for (j = 1; j <= r - mid; j++) { OpT0V]k^"9  
temp[r - j + 1] = data[j + mid]; =JK# "'  
} =#Qm D=  
int a = temp[l]; ;xl_9Ht/  
int b = temp[r]; ud @7%%  
for (i = l, j = r, k = l; k <= r; k++) { 45DR%cz  
if (a < b) { {W5D)  
data[k] = temp[i++]; 7K\H_YY8#  
a = temp; %J 'RO  
} else { S$egsK"~  
data[k] = temp[j--]; `J}-U\4F{  
b = temp[j]; d J;y>_  
} I$#)k^Q  
} /[|ODfY  
} ~l@-gAyw  
qt !T%K  
/** S}T*gUO  
* @param data x.:k0;%Q  
* @param l 4\?GA`@  
* @param i ?xgrr7  
*/ cYaf QyU  
private void insertSort(int[] data, int start, int len) { )b_ GKA `  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u3XQ<N{Gj  
} ^^m3 11=  
} J91O$szA  
} a!?&8$^<  
} ;&9A Yh.  
@N'0:0Nb_  
堆排序: (H*d">`mz  
w&E*{{otJ  
package org.rut.util.algorithm.support; B&Igm<72x  
B,]:<1l~  
import org.rut.util.algorithm.SortUtil; O(Tdn;1  
XJ.ERLR.  
/** [Tq\K ^!^  
* @author treeroot FlPPz  
* @since 2006-2-2 D]h~ \  
* @version 1.0 R Wd#)3  
*/ 1 iWe&I:  
public class HeapSort implements SortUtil.Sort{ .eSMI!Y=  
*k7vm%#ns  
/* (non-Javadoc) T P5?%SlJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mAFVjSa2  
*/ !83N. gN  
public void sort(int[] data) { b3 ,&RUF  
MaxHeap h=new MaxHeap(); r,` 59  
h.init(data); >cEB ,@~  
for(int i=0;i h.remove(); iQI$Y]Y7  
System.arraycopy(h.queue,1,data,0,data.length); 3V"y|q  
} J3$Ce%<   
i7m=V T  
private static class MaxHeap{ fy(i<L Z  
hSvA dT]m  
void init(int[] data){ _cW (R,i  
this.queue=new int[data.length+1]; qC%[J:RwF  
for(int i=0;i queue[++size]=data; t[.wx.y&0  
fixUp(size); gmY*}d` 'f  
} N` DLIv8i;  
} (;11xu  
#0+`dI_5/  
private int size=0; <Rl:=(]i~  
P0En&g+~  
private int[] queue; 3]X9 z  
G|p3NhLgO=  
public int get() { x 7;Zwd  
return queue[1]; `y2 6OYo  
} ~[CtsCiQ  
BE;J/  
public void remove() { iE|qU_2Y  
SortUtil.swap(queue,1,size--); ]vPa A  
fixDown(1); ww]^H$In  
} WG{mg/\2(C  
file://fixdown f4s^$Q{Q  
private void fixDown(int k) { fCMH<}w  
int j; g* NKY`,  
while ((j = k << 1) <= size) { A-GRuC  
if (j < size %26amp;%26amp; queue[j] j++; -,;Iob56!  
if (queue[k]>queue[j]) file://不用交换 9\/T #EP  
break; Qr/8kWa0 C  
SortUtil.swap(queue,j,k); EzDj,!!<w  
k = j; 6T}bD[h4?  
} nC3U%*l  
} [Z5Lgg&  
private void fixUp(int k) { }@ *Me+  
while (k > 1) { $>3/6(bW  
int j = k >> 1; 5ml^3,x  
if (queue[j]>queue[k]) QL>G-Rp  
break; \;?=h  
SortUtil.swap(queue,j,k); ::y+|V/  
k = j; b"ypS7 _  
} _l&`* 2d  
} pr|P#mc"J  
)V^J^1  
} !9!kb  
IX7|_ci  
}  '8NKrI  
|kwkikGQS  
SortUtil: v5|X=B>&>  
P&/PCSf  
package org.rut.util.algorithm; .EC/[fM  
\8uPHf_  
import org.rut.util.algorithm.support.BubbleSort; Lc|5&<8ZG1  
import org.rut.util.algorithm.support.HeapSort; 8t$a8 PE  
import org.rut.util.algorithm.support.ImprovedMergeSort; GfAt-huL(  
import org.rut.util.algorithm.support.ImprovedQuickSort; ^|6%~jkD5  
import org.rut.util.algorithm.support.InsertSort; +w-UK[p  
import org.rut.util.algorithm.support.MergeSort; 4]N`pD5  
import org.rut.util.algorithm.support.QuickSort; ZhKYoPIq  
import org.rut.util.algorithm.support.SelectionSort; P!C!E/Jf5  
import org.rut.util.algorithm.support.ShellSort; *f~X wy"  
q|,I\H5}  
/** %d+:0.+`n  
* @author treeroot \ A\a=A[  
* @since 2006-2-2 H1uNlPT  
* @version 1.0 A/W-'%+`  
*/ @WX]K0 $;  
public class SortUtil { ;T}#-`O_Im  
public final static int INSERT = 1; A2z%zMlZc  
public final static int BUBBLE = 2; ?aInn:FE  
public final static int SELECTION = 3; Urhh)i  
public final static int SHELL = 4; G3P3  
public final static int QUICK = 5; :K&   
public final static int IMPROVED_QUICK = 6; [R j=k)aBm  
public final static int MERGE = 7; /vFw5KUu  
public final static int IMPROVED_MERGE = 8; uXuMt a* Y  
public final static int HEAP = 9;  Hw34wQX  
dOq*W<%  
public static void sort(int[] data) { CTt3W>'=+  
sort(data, IMPROVED_QUICK); ZD1UMB0$4  
} YJ]]6 K+  
private static String[] name={ "sz)~Q'W5  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h"KN)xi$  
}; !`vm7FN"u  
]*pALT6  
private static Sort[] impl=new Sort[]{ 0fnd9`N!0  
new InsertSort(), "A^9WhUpJ  
new BubbleSort(), +nRO<  
new SelectionSort(), FqiC zP4  
new ShellSort(), $%VFk53I  
new QuickSort(), h2+vl@X  
new ImprovedQuickSort(), OWCd$c_(  
new MergeSort(), E9 {Gaa/{  
new ImprovedMergeSort(), \$s<G|<P  
new HeapSort() *&>1A A  
}; 0@1AH<  
eJ>(SkR:[  
public static String toString(int algorithm){ ghJ81  
return name[algorithm-1]; >t u3m2  
} RX:\@c&  
Ul OoMGg  
public static void sort(int[] data, int algorithm) { 7ZS 5u+o  
impl[algorithm-1].sort(data);  N\DEY]  
} =35^k-VS  
t#oY|G3O}  
public static interface Sort { 3*64)Ol7t]  
public void sort(int[] data); V@<tIui$  
} A[v]^pv'  
ofl3G {u  
public static void swap(int[] data, int i, int j) { 3> -/sii  
int temp = data; R_.C,mR ?  
data = data[j]; L.lmbxn  
data[j] = temp; Afo(! v  
} 0U ?1Yh7 m  
} #\iQ`Q<B  
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