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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。 Kn?>XXAc  
插入排序: +YI/(ko=  
zw_Xh~4"b  
package org.rut.util.algorithm.support; UQ}[2x(Kb  
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import org.rut.util.algorithm.SortUtil; ;S7MP`o@  
/** K_G( J>  
* @author treeroot sV%<U-X  
* @since 2006-2-2 7:)=  
* @version 1.0 u$X [=  
*/ 3ktjMVy\  
public class InsertSort implements SortUtil.Sort{ &&nvv&a  
`gDpb.=Y  
/* (non-Javadoc) J4;w9[a$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g~rZ=  
*/ :54ik,l  
public void sort(int[] data) { LkK%DY  
int temp; Rr{mD#+  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); N>/!e787OU  
} ;xS@-</:  
} =e$<[ "  
} 1~zzQ:jAZ  
K7 -AVMY  
} Fw)#[  
6c$ so  
冒泡排序: $BXZFC_1S  
qRZv[T%*Q  
package org.rut.util.algorithm.support; !D!~4h)  
wqkD  
import org.rut.util.algorithm.SortUtil; %iPWg  
nQy.?*X  
/** idPx! fe  
* @author treeroot G3 rTzMO  
* @since 2006-2-2 Ub2t7MU  
* @version 1.0 &)zNu  
*/ 3CL/9C>  
public class BubbleSort implements SortUtil.Sort{ C& BRyo  
2!Yq9,`  
/* (non-Javadoc) a\pOgIp  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'y[74?1  
*/ I 8TqK  
public void sort(int[] data) { MKf|(6;~  
int temp; ?x1sm"]p'  
for(int i=0;i for(int j=data.length-1;j>i;j--){ _kg<K D=P  
if(data[j] SortUtil.swap(data,j,j-1); %UT5KYd!=N  
} @a$_F3W  
} n?!XNXb  
} S81% iz.n  
} m!Cvd9X=  
}Go?j# !  
} 1LYz X;H1  
t(AW2{%}  
选择排序: n("Xa#mY[  
lR5[UKr  
package org.rut.util.algorithm.support; ,h,OUo]LIY  
iO 9.SF0:  
import org.rut.util.algorithm.SortUtil; 6?$yBu9l  
}Z#KPI8\Q  
/** T$rhz)_q  
* @author treeroot C~-x637/  
* @since 2006-2-2 ]9qY(m  
* @version 1.0 js;p7wi  
*/ >cU#($X$^  
public class SelectionSort implements SortUtil.Sort { nWb*u  
@6h ,#8#  
/* VRU"2mQ.P6  
* (non-Javadoc) d!0iv'^t  
* 8?LsV<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FnxPM`Zx  
*/ cq+G0F+H  
public void sort(int[] data) { diHK  
int temp; HVjN<HIqM  
for (int i = 0; i < data.length; i++) { Pt5"q3ec{T  
int lowIndex = i; A0X'|4I  
for (int j = data.length - 1; j > i; j--) { 2^ uP[  
if (data[j] < data[lowIndex]) { 7.)kG}q]  
lowIndex = j; ,Ei!\U^)  
} D+#OB|&Dn  
} Cm@rX A/  
SortUtil.swap(data,i,lowIndex); }?G([s56  
} S!WG|75B  
} #O 2g]YH  
"o_s=^U  
} C2t]  
X})5XYvA*  
Shell排序: ^Gi9&fS,  
[l44,!Z&  
package org.rut.util.algorithm.support; E$SYXe[,  
c"KN;9c,  
import org.rut.util.algorithm.SortUtil; Db4(E*/pj!  
{=K);z  
/** zVt1Ta:j  
* @author treeroot lCafsIB  
* @since 2006-2-2 X* 4C?v  
* @version 1.0 I+2#k\y  
*/ xmVW6 ,<?  
public class ShellSort implements SortUtil.Sort{ H=lzW_(  
?vt#M^Q   
/* (non-Javadoc) T*o!#E.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =&T%Jm}  
*/ x{DTVa 6y2  
public void sort(int[] data) { K@%o$S?>z_  
for(int i=data.length/2;i>2;i/=2){ 0JT"Pv_  
for(int j=0;j insertSort(data,j,i); D/[;Y<X#V  
} JuW"4R  
} Gh%R4)}  
insertSort(data,0,1); tTEw"DL_-  
} =csh=V@s  
90wGS_P04  
/** :j2?v(jT_l  
* @param data 6v"WI@b4  
* @param j '/="bSF  
* @param i gn//]|#H+  
*/ A@uU*]TqJ8  
private void insertSort(int[] data, int start, int inc) { lXpbAW  
int temp; uB=DC'lkg  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); t=nZ1GZyM  
} |j}D2q=  
} b:WA}x V  
} N\l|3~  
5ENU}0W  
} IA%|OVAfF  
:o3>  
快速排序: P2Jo^WS  
#| pn,/  
package org.rut.util.algorithm.support; &x?m5%^l  
_D 9/,n$  
import org.rut.util.algorithm.SortUtil; *82+GY]  
>:Y"DX-  
/** zMke}2  
* @author treeroot FEH+ PKSc  
* @since 2006-2-2 _C@A>]GT  
* @version 1.0 &|-jU+r}B  
*/ ?B+]Ex(\B,  
public class QuickSort implements SortUtil.Sort{ {x,d9I  
d\ I6Wn  
/* (non-Javadoc) mzf~qV^T  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mE\)j*Nnv  
*/ &=*sN`  
public void sort(int[] data) { R$h B9BK  
quickSort(data,0,data.length-1); +~K) ~  
} )O],$\u  
private void quickSort(int[] data,int i,int j){ Etn uEU  
int pivotIndex=(i+j)/2; l{I.l  
file://swap /IQ$[WR cx  
SortUtil.swap(data,pivotIndex,j); IM$ d~C  
Wr3z%1  
int k=partition(data,i-1,j,data[j]); 1%$t;R  
SortUtil.swap(data,k,j); P3!JA)p6a  
if((k-i)>1) quickSort(data,i,k-1); `pb=y}  
if((j-k)>1) quickSort(data,k+1,j); D\^mh{q(  
`]`S"W7&  
} U?%T~!  
/** >*MGF=.QG  
* @param data HV&i! M@T  
* @param i U5 ia|V  
* @param j XuoyB{U  
* @return ;V?3Hwl  
*/ mEmgr(W  
private int partition(int[] data, int l, int r,int pivot) { Cxd^i  
do{ ,|g&v/WlC%  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); )[ QT ?;  
SortUtil.swap(data,l,r); q eDXG  
} %Rt 5$+dNT  
while(l SortUtil.swap(data,l,r); Nwj M=GG  
return l; "!Qi$ ]  
} b@S~ =  
D GL=\  
} [Kg3:]2A  
C);3GPp  
改进后的快速排序: -FF#+Z$  
Yl&bv#[z  
package org.rut.util.algorithm.support; +B[XTn,Cru  
Q#F9&{'l  
import org.rut.util.algorithm.SortUtil; ce3``W/H3  
rf^ u&f  
/** u9{SG^  
* @author treeroot 2 g~W})e  
* @since 2006-2-2 Dz,|sHCmk  
* @version 1.0 j0^1BVcj  
*/ ZkWMo= vL  
public class ImprovedQuickSort implements SortUtil.Sort { [b+B"f6  
O]Ey@7 &  
private static int MAX_STACK_SIZE=4096; JXV#V7  
private static int THRESHOLD=10; $O&N  
/* (non-Javadoc) 9?q ^yy  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nA(5p?D+YB  
*/ Y <`X$  
public void sort(int[] data) { ~g9~D}48k'  
int[] stack=new int[MAX_STACK_SIZE]; 4k9$' k  
p"7]zq]'  
int top=-1; O=vD6@QI  
int pivot; 6i;q=N$'  
int pivotIndex,l,r; Zt& 7p  
{Mb2X^@7  
stack[++top]=0; bXvriQ.UH  
stack[++top]=data.length-1; EERCb%M 8Z  
u+y3( 0  
while(top>0){ JqUft=p5  
int j=stack[top--]; iSX HMp4V  
int i=stack[top--]; 1LaJ hrp?  
T_q M@/f  
pivotIndex=(i+j)/2; e7y,zcbv  
pivot=data[pivotIndex]; SQ*%d.1  
c'XSs  
SortUtil.swap(data,pivotIndex,j); xU2i&il^!  
Jz4;7/  
file://partition D9H%jDv  
l=i-1; 8>G5VhCm~o  
r=j; ex#-,;T  
do{ <`WDNi$Y  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); l9]nrT1Hy  
SortUtil.swap(data,l,r); V$w bmz  
} TV|Z$,6l  
while(l SortUtil.swap(data,l,r); r:PYAb=g  
SortUtil.swap(data,l,j); &1Y7Ne  
<I*N=;7  
if((l-i)>THRESHOLD){ g\9&L/xDN  
stack[++top]=i; f*:N*cC  
stack[++top]=l-1; wy^mh.= UX  
} vTo+jQs^  
if((j-l)>THRESHOLD){ bxPJ5oT  
stack[++top]=l+1; OLWn0  
stack[++top]=j; S(Z\h_m(  
} :fDzMD  
q6hH]Q>w*  
} 0}YadNb7  
file://new InsertSort().sort(data);  k{'<J(Hb  
insertSort(data); OJ7 Uh_;/  
} L8Q/!+K  
/** o6RT4`  
* @param data d04gmc&*  
*/ zJh!Q**  
private void insertSort(int[] data) { $WE=u9m  
int temp; r oPC ^Q  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); PT~F ^8,)  
} oB@)!'  
} cuI&Q?+c}  
} y<~(}xsHh  
X40JCQx{+  
} 1;?w#/&t  
VU6+" 2+'2  
归并排序: Lctp=X4  
9=FH2|Z  
package org.rut.util.algorithm.support; Q-A_8  
oKr= ]p  
import org.rut.util.algorithm.SortUtil; z8r?C  
@My RcC  
/** &xvNR=K[`  
* @author treeroot E:O/=cT  
* @since 2006-2-2 V)4?y9xZv  
* @version 1.0 \ KsKb0sM  
*/ e A3 NyL  
public class MergeSort implements SortUtil.Sort{ l: kW|  
B qINU  
/* (non-Javadoc) w11L@t[5W8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O>I%O^  
*/ +3M1^:  
public void sort(int[] data) { ?v-!`J>EF#  
int[] temp=new int[data.length]; 1FG"Ak}D  
mergeSort(data,temp,0,data.length-1);  $C,` ^n'  
} \rT>&o .i  
-;;m/QM  
private void mergeSort(int[] data,int[] temp,int l,int r){ m&#D~  
int mid=(l+r)/2; Z%b1B<u$  
if(l==r) return ; ]ncK M?'O  
mergeSort(data,temp,l,mid); U6o]7j&6  
mergeSort(data,temp,mid+1,r); 1vAJ(O{-  
for(int i=l;i<=r;i++){ + rM]RFi  
temp=data; JaR!9GVN7  
} 1D2RhM%  
int i1=l; uKTYb#E7  
int i2=mid+1; 6ZwQ/~7H  
for(int cur=l;cur<=r;cur++){ nEP3B '+  
if(i1==mid+1) _mQj=  
data[cur]=temp[i2++]; /1m+iM^V  
else if(i2>r) E(z|LS*3  
data[cur]=temp[i1++]; k py)kS  
else if(temp[i1] data[cur]=temp[i1++]; /!.]Y8yEH  
else EP90E^v^  
data[cur]=temp[i2++]; Nx+5rp  
}  XF>!~D  
} 5Q:49S47  
t\PSB  
} (WP^}V5  
c/=\YeR  
改进后的归并排序: EY.m,@{  
hQz1zG`z7  
package org.rut.util.algorithm.support; p AaNWm  
W6r3v)~  
import org.rut.util.algorithm.SortUtil; b\kA  
kIe)ocJg  
/** -G#m'W&  
* @author treeroot Eg2SC?5  
* @since 2006-2-2 {lUaN0O:  
* @version 1.0 Z 0v&AD=  
*/ &T ^bv*P  
public class ImprovedMergeSort implements SortUtil.Sort { ]3 Ibl^J  
t0?t Xe.B  
private static final int THRESHOLD = 10; E70o nR!i  
b_u; `^  
/* bA'N2~.,  
* (non-Javadoc) hSN38wy  
* ^ 4p$@5zH  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 91nB?8ZE6,  
*/ s$lJJL  
public void sort(int[] data) { ($8!r|g5#  
int[] temp=new int[data.length]; 4Me3{!HJz  
mergeSort(data,temp,0,data.length-1); )T&r770  
} $" =3e]<  
ka{!' ^  
private void mergeSort(int[] data, int[] temp, int l, int r) { wbk$(P'gN  
int i, j, k; h2= wC.  
int mid = (l + r) / 2;  [@3.dd  
if (l == r) ]US!3R^  
return; AM#s2.@  
if ((mid - l) >= THRESHOLD) :QHh;TIG=<  
mergeSort(data, temp, l, mid); ,g3n/'rP%  
else !/! Fc'A  
insertSort(data, l, mid - l + 1); r^ '  
if ((r - mid) > THRESHOLD) RMid}BRE  
mergeSort(data, temp, mid + 1, r); DK'S4%;Sp  
else \C2HeA\#SW  
insertSort(data, mid + 1, r - mid); Gv[(0  
Y:Jgr&*,z  
for (i = l; i <= mid; i++) { dQAF;L  
temp = data; {Q`Q2'@  
} 4af^SZ )l  
for (j = 1; j <= r - mid; j++) { `D$RL*C;M`  
temp[r - j + 1] = data[j + mid]; j0n.+CO-{  
} )(c%QWz  
int a = temp[l]; |TF6&$>d  
int b = temp[r]; !kH 1|  
for (i = l, j = r, k = l; k <= r; k++) { 0,8RA_Ca}  
if (a < b) { C~nL3w  
data[k] = temp[i++]; 3{Zd<JYg4-  
a = temp; ZsYY)<n  
} else { l&m Y}k  
data[k] = temp[j--]; ~jz51[{v  
b = temp[j]; ~EvGNnTL  
} 9Sa6v?sRor  
} xK5~9StP  
} 6TXTJ]er  
7&w[h4Lw  
/** n;:C{5  
* @param data =rkW325O  
* @param l g@>93j=cZU  
* @param i myd:"u,}9  
*/ nyOmNvZf  
private void insertSort(int[] data, int start, int len) { PeLzZ'$D  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (B?ZUXM,  
} m& D#5C  
} vTWm_ed+^  
} Bo'v!bI7  
} 5aXE^.`  
~\<L74BB  
堆排序: 6['o^>\}f  
S/l6c P  
package org.rut.util.algorithm.support; #>sI XY  
u% =2g'+)_  
import org.rut.util.algorithm.SortUtil; 8_O?#JYi  
ov >5+"q)  
/** ~8-xj6^  
* @author treeroot $' ::51  
* @since 2006-2-2 _~}2@&*G"  
* @version 1.0 J: I@kM  
*/ h}DKFrHW;-  
public class HeapSort implements SortUtil.Sort{ S&D8Rao5  
N&|,!Cu  
/* (non-Javadoc) SDk^fTV8x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {M\n  
*/ ;0uiO.  
public void sort(int[] data) { 8kE3\#);\  
MaxHeap h=new MaxHeap(); l?Ibq}[~  
h.init(data); "3_GFq  
for(int i=0;i h.remove(); c'5ls7?}O{  
System.arraycopy(h.queue,1,data,0,data.length); 1S yG  
} :YLurng/]  
O]j<$GG!  
private static class MaxHeap{ d b *J  
#3A|Z=,5  
void init(int[] data){ *D1vla8  
this.queue=new int[data.length+1]; 1 (e64w@  
for(int i=0;i queue[++size]=data; L@ejFXQg  
fixUp(size); \Xr*1DI<  
} jx ?"`;a  
} IlB*JJnl  
o1-_BlZ  
private int size=0; 2h)Qz+|7  
}KEr@h,N  
private int[] queue; )#`&[9d-  
>Pvz5Hf/wW  
public int get() { ;krIuk-  
return queue[1]; h R6Pj"@0  
} Ry?f; s  
~mv5{C  
public void remove() { N:Ir63X*#  
SortUtil.swap(queue,1,size--); ksUF(lYk  
fixDown(1); Q^* 3 3  
} .>LJ(Sx9b  
file://fixdown Z'|k M!  
private void fixDown(int k) { \l`{u)V  
int j; bL+}n8B  
while ((j = k << 1) <= size) { Q\btl/?  
if (j < size %26amp;%26amp; queue[j] j++; Wr'1Y7z  
if (queue[k]>queue[j]) file://不用交换 tZu1jBO_Q4  
break; i)$<j!L  
SortUtil.swap(queue,j,k); Wv ~&Qh}  
k = j; b # Llu$  
} Lg|d[*;'7  
} /w2-Pgm-[\  
private void fixUp(int k) { ,lFp4 C  
while (k > 1) { m1xR uj]  
int j = k >> 1; 'u d[#@2  
if (queue[j]>queue[k]) QbY@{"" `  
break; FPM l;0{  
SortUtil.swap(queue,j,k); Iv*u#]{t  
k = j; wzBI<0]z  
} QGE0pWL-a  
} sa"}9IE*8  
\0&F'V  
} Sl@Ucc31  
z<.?8bd  
} Jb-.x_Bf  
q1m{G1W n  
SortUtil: ^`Hb7A(  
aK 3'u   
package org.rut.util.algorithm; #7/39zTK  
Ds#BfP7a  
import org.rut.util.algorithm.support.BubbleSort; ,J:Ro N_:  
import org.rut.util.algorithm.support.HeapSort; t+{vb S0  
import org.rut.util.algorithm.support.ImprovedMergeSort; '|<S`,'#hg  
import org.rut.util.algorithm.support.ImprovedQuickSort; &:1q3 gDm  
import org.rut.util.algorithm.support.InsertSort; usC$NVdm  
import org.rut.util.algorithm.support.MergeSort; '}"&JO~vPj  
import org.rut.util.algorithm.support.QuickSort; S0}=uL#dt  
import org.rut.util.algorithm.support.SelectionSort; \1QY=}  
import org.rut.util.algorithm.support.ShellSort; *kEzGgTzoS  
8DM! ]L  
/** ?nq%'<^^  
* @author treeroot @[Q`k=h$  
* @since 2006-2-2 ydAiH*>  
* @version 1.0 `PSjk F(  
*/ 2<n@%'OQp  
public class SortUtil { aPQxpK?  
public final static int INSERT = 1; qv'w 7T  
public final static int BUBBLE = 2; [+!&iN  
public final static int SELECTION = 3; E>`|?DE@  
public final static int SHELL = 4; $g/h=w@  
public final static int QUICK = 5; ?nWzJ5w3  
public final static int IMPROVED_QUICK = 6; 3xiDt?&H  
public final static int MERGE = 7; g(,^'; j  
public final static int IMPROVED_MERGE = 8; n|KYcU#  
public final static int HEAP = 9; U.JE \/  
e6^}XRyf  
public static void sort(int[] data) { 4IvT}Us#+  
sort(data, IMPROVED_QUICK); n 8 K6m(  
} nd7g8P9p  
private static String[] name={ a,r B7aD  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w4M;e;8m[U  
}; p<,`l)o}~  
TwI'XMO;A  
private static Sort[] impl=new Sort[]{ +_+j"BT  
new InsertSort(), g4952u  
new BubbleSort(), =itQ@ ``r  
new SelectionSort(), / :6|)AW.{  
new ShellSort(), ]hoq!:>M1  
new QuickSort(), e[0"x. gu  
new ImprovedQuickSort(), `csZ*$7  
new MergeSort(), ga(k2Q;y  
new ImprovedMergeSort(), *ZxurbX#  
new HeapSort() }r!hm?e  
}; q6<P\CSHy<  
P,F eF'J^  
public static String toString(int algorithm){ -4P `:bF  
return name[algorithm-1]; o{^`Y   
} KHgn  
+C[g>c}d  
public static void sort(int[] data, int algorithm) { vm'ZA7f6  
impl[algorithm-1].sort(data); S>S7\b'  
} 9y<h.T  
-4zV yW S<  
public static interface Sort { L"n)fe$  
public void sort(int[] data); 6U.|0mG[  
} v+8Ybq  
K1Uq` TJ  
public static void swap(int[] data, int i, int j) { L(sT/  
int temp = data; ;{q*  
data = data[j]; PB?2{Cj  
data[j] = temp; c&FOt  
} !a-B=pn!]  
} Bv' %$}}-  
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