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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。 $O,$KAC  
插入排序: s"`uE$6N  
MIasCH>r  
package org.rut.util.algorithm.support; 'mj0+c$  
1HxE0>  
import org.rut.util.algorithm.SortUtil; j}Lt"r2F  
/** xN0n0  
* @author treeroot &AH@|$!E  
* @since 2006-2-2 A!&p,KfT5+  
* @version 1.0 2MmqGB}YcW  
*/ &Cp)\`[y  
public class InsertSort implements SortUtil.Sort{ UOH2I+@V  
5+dQGcE@  
/* (non-Javadoc) Iq.*2aff+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D1t@Y.vl  
*/ /\_`Pkd3m  
public void sort(int[] data) { -:t<%]RfY  
int temp; 0 } uEM_a  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); t8 g^W K  
} hv te)  
} ,%e.nj9  
} s QfP8}U  
a)GL z  
} *A.E?9pL\  
%CJgJ,pk>  
冒泡排序: TO.?h!  
W4Nbl  
package org.rut.util.algorithm.support; @ae;&  
<SmXMruU  
import org.rut.util.algorithm.SortUtil; Q~<$'j  
g76l@QYIU  
/** wQJY,|.  
* @author treeroot  UN[rW0*  
* @since 2006-2-2 " jly[M}C  
* @version 1.0 5$0@f`sj  
*/ B ?96d'A  
public class BubbleSort implements SortUtil.Sort{ Alaq![7MDP  
Se+sgw_"  
/* (non-Javadoc) Rok` }t  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wfgs[  
*/ 4ihv|%@  
public void sort(int[] data) { udM<jY]5p  
int temp; XZhuV<  
for(int i=0;i for(int j=data.length-1;j>i;j--){ iZ2|/hnw  
if(data[j] SortUtil.swap(data,j,j-1); 6 ?F F !x  
} =FQ]eb*  
} !mH2IjcL  
} >Du5B&41  
} /PF X1hSu  
$EHAHNL?Lx  
} XNkw9*IT  
{-D2K:m  
选择排序: ;o }pRC  
)3PQ|r'  
package org.rut.util.algorithm.support; ?it49  
4^(u6tX5|+  
import org.rut.util.algorithm.SortUtil; 0\# uxzdhJ  
DZKVZ_q  
/** O?|opD  
* @author treeroot q\*",xZxwz  
* @since 2006-2-2 6T0[ ~@g5  
* @version 1.0 LM }0QL m?  
*/ *&{M ,  
public class SelectionSort implements SortUtil.Sort { {^ 1s  
JnE\E(ez  
/* 6[>UF!.=  
* (non-Javadoc) zk= 3L} C  
* T<kyxbjR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ycB>gd  
*/ A$ v Cm  
public void sort(int[] data) { 'p,QI>  
int temp; 'aMT^w4if)  
for (int i = 0; i < data.length; i++) { I@~hz%'  
int lowIndex = i; s,> 1n0a  
for (int j = data.length - 1; j > i; j--) { -I4-K%%B`  
if (data[j] < data[lowIndex]) { LyRto  
lowIndex = j; ?LAKH$t  
} G>f-w F6  
} 7@al)G;~  
SortUtil.swap(data,i,lowIndex); MFO}E!9`q  
} &o*/6X  
} Vvu+gP'z.  
i2`i5&*  
} "mr;|$Y  
i3g;B?54  
Shell排序: 9NLO{kN  
{FyGh */  
package org.rut.util.algorithm.support; nsk`nck  
Tx"}]AyB6  
import org.rut.util.algorithm.SortUtil; <Okk;rj2  
<_&tP=h  
/** 'PTWC.C?9  
* @author treeroot _=@9XvNM  
* @since 2006-2-2 $$8xdv#  
* @version 1.0 f!2`N  
*/ w A<JJ_R  
public class ShellSort implements SortUtil.Sort{ L/9f"%kZ  
yEL^Y'x?  
/* (non-Javadoc) q5J6d+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;B>2oq  
*/ | W:JI  
public void sort(int[] data) { fdP[{.$?(  
for(int i=data.length/2;i>2;i/=2){ YO o?.[}@  
for(int j=0;j insertSort(data,j,i); !Ziq^o.  
} 'V=w?G 5  
} mle"!*  
insertSort(data,0,1); [I:D\)$<  
} 2^N 4(  
d[;=X.fZ2  
/**  )TV4OT#  
* @param data AU@K5jwDwQ  
* @param j zn|~{9>y  
* @param i {:M5t1^UC  
*/ `vWFTv  
private void insertSort(int[] data, int start, int inc) { xq1 =O  
int temp; u1 d{|fF  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); |Q2H^dU'rQ  
} &z;F'>"  
} h7mJXS)t|  
} bAv>?Xqa  
/pzEL  
} 3#vhQ*xU  
E ?(+v  
快速排序: 2)(P;[m^o  
r J'm>&Ps  
package org.rut.util.algorithm.support; vB(tpki|  
eED Fm  
import org.rut.util.algorithm.SortUtil; aV`4M VWOz  
.lm^+1}r  
/** _KVge)j  
* @author treeroot b6BeOR*ps  
* @since 2006-2-2 RMU]GCa  
* @version 1.0 zMasA  
*/ {'P7D4w  
public class QuickSort implements SortUtil.Sort{ H: q(T >/w  
gHc0n0ZV  
/* (non-Javadoc) 5]n5nqz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c%Ht; sK`*  
*/ WMfu5x7e4  
public void sort(int[] data) { /=co/}i  
quickSort(data,0,data.length-1); :{NvBxc[  
} t. B %7e  
private void quickSort(int[] data,int i,int j){ G\3@QgyQ  
int pivotIndex=(i+j)/2; |,rIB  
file://swap Ht#5;c2/  
SortUtil.swap(data,pivotIndex,j); En%PIkxeR  
]h8[b9$<")  
int k=partition(data,i-1,j,data[j]); b}63?.M{  
SortUtil.swap(data,k,j); {2?o:  
if((k-i)>1) quickSort(data,i,k-1); qv|geBW  
if((j-k)>1) quickSort(data,k+1,j); 7N0V`&}T  
3uA%1 E  
} .zf#S0y%(  
/** </0@7  
* @param data !IlsKMZ  
* @param i a!YpSFr  
* @param j =w='qjh  
* @return I\J ^@&JE  
*/ I_xvg >i  
private int partition(int[] data, int l, int r,int pivot) { 4A(kM}uRB  
do{ *cn,[  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ],{b&\  
SortUtil.swap(data,l,r); !C>}j* 4  
} "{-jZdq'  
while(l SortUtil.swap(data,l,r); *{|{T_H:  
return l; mk#xbvvG  
} &t1?=F,]  
{w*5uI%%e  
} R/ 5aIh  
/ *=1hF  
改进后的快速排序: gB1w,96J  
H(bR@Qok  
package org.rut.util.algorithm.support; ab4(?-'-  
%:rct  
import org.rut.util.algorithm.SortUtil; 4L}i`)CmB  
& yFS  
/**  meQ>mW  
* @author treeroot }& ;49k  
* @since 2006-2-2 (izGF;N+  
* @version 1.0 r(9#kLXg  
*/ mZLrU<)Y  
public class ImprovedQuickSort implements SortUtil.Sort { nRq @hk  
/y/O&`X(  
private static int MAX_STACK_SIZE=4096; .|x\6 jf  
private static int THRESHOLD=10; )i@j``P  
/* (non-Javadoc) (}1 gO  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \]pRu"  
*/  ;ew j  
public void sort(int[] data) { a?#v,4t^  
int[] stack=new int[MAX_STACK_SIZE]; !qe ,&JL  
!.>TF+]  
int top=-1; Q _Yl:c  
int pivot; LPr34BK  
int pivotIndex,l,r; R$qp3I  
$*EK v'g[n  
stack[++top]=0; d $~q  
stack[++top]=data.length-1; \ci'Cbn\o  
C" vj#Tx  
while(top>0){ ox9$aBjJ  
int j=stack[top--]; Y] Q=kI  
int i=stack[top--]; NYopt?Xg  
{.=4;   
pivotIndex=(i+j)/2; !Cse,6/Z  
pivot=data[pivotIndex]; m,U Mb#7Y  
.|=~x3mPw  
SortUtil.swap(data,pivotIndex,j); yhnhORSY;  
6 6S I  
file://partition E#'JYz@  
l=i-1; zq ;YE  
r=j; ^~iu),gu  
do{ .{,PC  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); yTj!(C  
SortUtil.swap(data,l,r); .Y!] {c  
} p'PHBb8I  
while(l SortUtil.swap(data,l,r); aH6{_eY  
SortUtil.swap(data,l,j); ]ADj 9  
Y![m'q}K  
if((l-i)>THRESHOLD){ d8l T+MS=  
stack[++top]=i; r)S tp`p  
stack[++top]=l-1; #NU;$ &  
} WDznhMo  
if((j-l)>THRESHOLD){ b[}f]pB@n  
stack[++top]=l+1; t+C9QXY  
stack[++top]=j; 72J@Dc  
} dg#w/}}m  
3/+r*lv>X  
} lP$bxUNt  
file://new InsertSort().sort(data); JBY`Y ]V3  
insertSort(data); >^mNIfdE^=  
} !ho~@sc{W  
/** 1eiV[z$?  
* @param data 3{wr*L1%-~  
*/ 3Yu1ZuIR  
private void insertSort(int[] data) { A6D.bJ)  
int temp; 5LJUD>f9 Z  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); L< 3U)Gp  
} 4x8e~/  
} 7S"W7O1>  
} {J_1.uN=  
D|zlC,J,  
} =*K~U# uoC  
3]Jl\<0  
归并排序: Ln~Z_!  
C)w11$.YQ9  
package org.rut.util.algorithm.support; Cso!VdCX  
s{I Xth6  
import org.rut.util.algorithm.SortUtil; 6g\SJ O-;N  
`U-i{i  
/** 3aMfZa<=  
* @author treeroot |g o jb  
* @since 2006-2-2 g.3 . C?  
* @version 1.0 xc|pl!ns  
*/ qIm?F>> @  
public class MergeSort implements SortUtil.Sort{ (?luV#{5  
-p|JJx?r  
/* (non-Javadoc) wD(1Sr5n  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <Uz~V;  
*/ R4xoc;b  
public void sort(int[] data) { rLt`=bl&&U  
int[] temp=new int[data.length]; 0MV^-M   
mergeSort(data,temp,0,data.length-1); 3I|&}+Z6  
} 4}mp~AXy;z  
CHeU`!:  
private void mergeSort(int[] data,int[] temp,int l,int r){ M6$9-  
int mid=(l+r)/2; EVovx7dr  
if(l==r) return ; (wxdT6RVm\  
mergeSort(data,temp,l,mid); kzZdYiC  
mergeSort(data,temp,mid+1,r); .23z\M8 -  
for(int i=l;i<=r;i++){ }B-@lbK6)  
temp=data; jlhyn0  
} ?fO 2&)r  
int i1=l; irqNnnMGEa  
int i2=mid+1; Z_%9LxZlyj  
for(int cur=l;cur<=r;cur++){ }zA kUt  
if(i1==mid+1) K6vF}A|  
data[cur]=temp[i2++]; k-o(Q"[ '  
else if(i2>r) x2@Q5|a  
data[cur]=temp[i1++]; hXxgKi%  
else if(temp[i1] data[cur]=temp[i1++]; q]1HCWde  
else /jBjqE;_  
data[cur]=temp[i2++]; .#py5&`%  
} MjGeH>c  
} gEWKM(5B}  
fpj,~+  
} G@4ro<  
{|Ew]Wq  
改进后的归并排序: {Ac5(li_  
@fDWp/  
package org.rut.util.algorithm.support; H.sYy-_]F  
:o!bz>T  
import org.rut.util.algorithm.SortUtil;  C~C}b  
]QB<N|ps  
/** (eTe`   
* @author treeroot VBHDI{HzRv  
* @since 2006-2-2 v%mAU3M  
* @version 1.0 *3,GQ%~/z  
*/ x3X^\ Ig  
public class ImprovedMergeSort implements SortUtil.Sort { RTHe#`t  
z(-j%?  
private static final int THRESHOLD = 10; AOh\%|}  
*} yOL [  
/* :n1^Xw0q  
* (non-Javadoc) P[;<,U;'HO  
* Q> Lh.U,{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zF+NS]XK  
*/ ]h]|PdN  
public void sort(int[] data) { fSe$w#*I  
int[] temp=new int[data.length]; -2)6QKh~D  
mergeSort(data,temp,0,data.length-1); !/1aot^(  
} *'b3Z3c,;  
:>@6\    
private void mergeSort(int[] data, int[] temp, int l, int r) { W u4` 3  
int i, j, k; ;0)|c}n+.5  
int mid = (l + r) / 2; }N^A (`L  
if (l == r) Idy{(Q  
return; vr/O%mDp  
if ((mid - l) >= THRESHOLD) )qg cz<p?W  
mergeSort(data, temp, l, mid); ^qn,b/>L  
else iL^bf*  
insertSort(data, l, mid - l + 1); B@v\tpR  
if ((r - mid) > THRESHOLD)  s~A#B)wB  
mergeSort(data, temp, mid + 1, r); `WjRb  
else =F!_ivV  
insertSort(data, mid + 1, r - mid); x,f=J4yco  
=dVPx<l5  
for (i = l; i <= mid; i++) { <!+T#)Qi  
temp = data; T d7f  
} Z0Tpz2m  
for (j = 1; j <= r - mid; j++) { m)5,ut/  
temp[r - j + 1] = data[j + mid]; pN-l82]'  
} !,;>)R   
int a = temp[l]; 4|?y [j6  
int b = temp[r]; ~ULD{Ov'F  
for (i = l, j = r, k = l; k <= r; k++) { d&!;uzOx  
if (a < b) { ,BUDo9h  
data[k] = temp[i++]; 7Wd}H Z  
a = temp; k0%*{IVPN  
} else { 0|1)cO}Dy  
data[k] = temp[j--]; ~OuKewr\  
b = temp[j]; qDMVZb-(#  
} L7~9u|7a#  
} utH,pGs C.  
} Y[(U~l,a+  
hJkP_( +J\  
/** SN${cs%  
* @param data C}i1)   
* @param l 0QWc1L  
* @param i ~1_v;LhH5+  
*/  b7]MpL  
private void insertSort(int[] data, int start, int len) { 0j =xWC  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q_5hKipd\b  
} 7W)*IJ  
} Ukf4Q\@w  
} X?2ub/Nr#Y  
} gpIq4Q<  
.u+ZrA#  
堆排序: :A~6Gk92A  
,'7 X|z/_>  
package org.rut.util.algorithm.support; -y@# ^SrJ  
4pYscB  
import org.rut.util.algorithm.SortUtil; <BUKTRq  
;9WS#>o  
/** Yqpe2II7  
* @author treeroot n54}WGo>9  
* @since 2006-2-2 e`N/3q7  
* @version 1.0 GmjTxNU@  
*/ ws^ 7J/8  
public class HeapSort implements SortUtil.Sort{ !>n^ ;u  
i!|OFU6  
/* (non-Javadoc)  BZ'63  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6k1;62Ntk  
*/ kYwV0xQ  
public void sort(int[] data) { Hp#IOsP~  
MaxHeap h=new MaxHeap(); ^HO'"/tB@D  
h.init(data); z0yPBt1W  
for(int i=0;i h.remove(); l\Q--  
System.arraycopy(h.queue,1,data,0,data.length); W8@o7svrh  
} M%U1?^j8  
+2qCH^80  
private static class MaxHeap{ z 1~2w:  
VL[}  
void init(int[] data){ Wu{cE;t  
this.queue=new int[data.length+1]; vs*Q {  
for(int i=0;i queue[++size]=data; ##_`)/t,  
fixUp(size); 1N3qMm^  
} h$[tEmD%  
} ]J] ~i[  
\dB)G<_  
private int size=0; ,V>7eQt?  
sI&|qK-(  
private int[] queue; <Qx]"ZP%  
Hzn6H4Rc  
public int get() { R6xJw2;_  
return queue[1]; !4?QR  
} h;+bHrKji  
|qp^4vq.p  
public void remove() { SU8vz/\%y  
SortUtil.swap(queue,1,size--); %o4d(C B  
fixDown(1); KKFV+bK)  
} :iKk"r,2P[  
file://fixdown xE0'eC5n^  
private void fixDown(int k) { l-~ o&n  
int j; #9's^}i  
while ((j = k << 1) <= size) { eeix-Wt*E  
if (j < size %26amp;%26amp; queue[j] j++; nQHQVcDs8  
if (queue[k]>queue[j]) file://不用交换 54^2=bp  
break; OG!+p}yD]  
SortUtil.swap(queue,j,k); W%&[gDp  
k = j; 0q !  
} ?'jRUfl   
} s)eU^4m  
private void fixUp(int k) { UtpK"U$XOU  
while (k > 1) { R9-Ps qmF  
int j = k >> 1; lk(q>dvK  
if (queue[j]>queue[k]) Z%_m<Nf8T  
break; s|q]11r+H  
SortUtil.swap(queue,j,k); V1d{E 0lM  
k = j; %F.^cd"  
} RaX :&PE  
} JKJ+RkXf3  
]"T1clZKd(  
} u A=x~-I  
V 5  
} K+F]a]kld  
ywCF{rRd  
SortUtil: LQr+)wI  
)W0zu\fL =  
package org.rut.util.algorithm; =KCAHNr4?  
xO` `X<  
import org.rut.util.algorithm.support.BubbleSort; K'DRX85F  
import org.rut.util.algorithm.support.HeapSort; F?3zw4Vt~  
import org.rut.util.algorithm.support.ImprovedMergeSort; HOPi2nf{  
import org.rut.util.algorithm.support.ImprovedQuickSort; @`D`u16]i  
import org.rut.util.algorithm.support.InsertSort; 7hq$vI%0  
import org.rut.util.algorithm.support.MergeSort; xDtJ& 6uFw  
import org.rut.util.algorithm.support.QuickSort; m7n8{J1O2  
import org.rut.util.algorithm.support.SelectionSort; EPn0ZwnS:M  
import org.rut.util.algorithm.support.ShellSort; Ra~|;( %d  
{~=Z%Cj2Q  
/** BT3X7Cx  
* @author treeroot (G#QRSXc\  
* @since 2006-2-2 s2N~p^  
* @version 1.0 1P '_EJ]M  
*/ UbDRE[^P  
public class SortUtil { $HE ?B{  
public final static int INSERT = 1; %1jlXa  
public final static int BUBBLE = 2; gA/8Df\G:l  
public final static int SELECTION = 3; xUw)mUn@N  
public final static int SHELL = 4; -Y:^<C^^&8  
public final static int QUICK = 5; VW%eB  
public final static int IMPROVED_QUICK = 6; 2 yY.rs  
public final static int MERGE = 7; 0;6 ^fiSY;  
public final static int IMPROVED_MERGE = 8; uY"Bgz:=d  
public final static int HEAP = 9; { d*?O  
sDF5  
public static void sort(int[] data) { ' Akt5q  
sort(data, IMPROVED_QUICK); ?_<14%r;  
} IFd2r;W8  
private static String[] name={ F2bAo6~R  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '{ I YANVT  
}; 5m(V(@a3  
 fcLVE  
private static Sort[] impl=new Sort[]{ TQjM3Ri=V  
new InsertSort(), &nXa /XIZ_  
new BubbleSort(), CEMe2~  
new SelectionSort(), Ga9^+.j  
new ShellSort(), 7L"Pe'Hw  
new QuickSort(),  +bC=yR  
new ImprovedQuickSort(), r'/H3  
new MergeSort(), rF>7 >wq  
new ImprovedMergeSort(), FsXqF&{  
new HeapSort() N:]Ud(VRM  
}; 3R|C$+Sc  
+. `  I  
public static String toString(int algorithm){ )8244;  
return name[algorithm-1]; *^WY+DV  
} 017(I:V?(:  
)K"7=TvY  
public static void sort(int[] data, int algorithm) { EWX!:BKf  
impl[algorithm-1].sort(data); p0b2n a !  
} no`>r}C  
}@'Zt6+tS  
public static interface Sort { zK@DQ5  
public void sort(int[] data); due'c!wW  
} bFt$u]Yvo  
' 6#en9{L  
public static void swap(int[] data, int i, int j) { Kz`g Q|S  
int temp = data; { :~&#D  
data = data[j]; #383W)n  
data[j] = temp; IBY(wx[5S  
} }.$5'VGO  
} s<;kTReA  
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