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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。 ]@>bz  
插入排序: @I #@%"AW  
MX6;ww  
package org.rut.util.algorithm.support; B4_0+K H  
(N0G[(>  
import org.rut.util.algorithm.SortUtil; *}A J7]  
/** |_ E)2b:h  
* @author treeroot WZ;f3 "  
* @since 2006-2-2 .u)Po;e`  
* @version 1.0 pgfI1`h  
*/ Q_qc_IcM y  
public class InsertSort implements SortUtil.Sort{ mp%i(Y"vp  
 jats)!:  
/* (non-Javadoc) 9Jaek_A`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X{<j%PdC  
*/ OV Iu&6#  
public void sort(int[] data) { a*KB'u6&  
int temp; cPkN)+K  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);  \KDOI7  
} Z#nj[r!l}  
} bsR&%C  
} NA!;#!  
D 0\  
} )$i7b  
VO/" ot  
冒泡排序: mS0*%[S {  
?UQE;0 B  
package org.rut.util.algorithm.support; q?e97a  
~g~z"!K  
import org.rut.util.algorithm.SortUtil; }vPDCUZ  
d*7 Tjs{\  
/** C/tn0  
* @author treeroot XM>ByfD{  
* @since 2006-2-2 \<]nv}1O  
* @version 1.0 ^1Y0JQ  
*/ LH3PgGi,  
public class BubbleSort implements SortUtil.Sort{ _Z@- q  
e:6R+8s2  
/* (non-Javadoc) C$-IDBXK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @$4(!80-  
*/ ^t?P32GJ  
public void sort(int[] data) { /t(dhz&xN  
int temp;  5!NK  
for(int i=0;i for(int j=data.length-1;j>i;j--){ km4::'(6  
if(data[j] SortUtil.swap(data,j,j-1); f'TdYG  
} =uIu0_v  
} 7.hn@_  
} zgJ%Zr!~  
} cc Z A  
*3s4JK  
} Y*dzoN.sW  
4-lEo{IIM  
选择排序: d {T3  
3QL'uk  
package org.rut.util.algorithm.support; PGOi#x  
1#&*xF "  
import org.rut.util.algorithm.SortUtil; AFF7fK  
BJ@tU n  
/** w`UB_h#Bl  
* @author treeroot Tmg~ZI:MW  
* @since 2006-2-2 =ugxPgn  
* @version 1.0 RL[?&L$7^%  
*/ a)`b;]+9  
public class SelectionSort implements SortUtil.Sort { 0' @^PzX  
'/Hx0]V  
/* ix=HLF-0zC  
* (non-Javadoc) @c9VCG D  
* ezY _7  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "'~'xaU!=a  
*/ F9^8/Z  
public void sort(int[] data) { N;9@-Tb  
int temp; 3;u*_ ]N_  
for (int i = 0; i < data.length; i++) { k"LbB#Q  
int lowIndex = i; 9axJ2J'g  
for (int j = data.length - 1; j > i; j--) { >u4%s7 v  
if (data[j] < data[lowIndex]) { CVyqr_n65/  
lowIndex = j; YJ'h=!p}G  
} Sdy\s5  
} e #> wv]V  
SortUtil.swap(data,i,lowIndex); 6NVf&;laQ  
} {*r*+}@  
} Mp:tcy,*  
^^qB=N[';  
} rL w,?  
Ont4-AP   
Shell排序: .>Gq/[c0|  
AhZ8B'Ee  
package org.rut.util.algorithm.support; s"*zyLUUo  
k+f!)7_  
import org.rut.util.algorithm.SortUtil; :[ F`tDL  
\`Db|D?oy  
/** ?a+tL'D[  
* @author treeroot zZ3,e L  
* @since 2006-2-2 OQ;DqV  
* @version 1.0 )Fe-C  
*/ ]s ?BwLU6  
public class ShellSort implements SortUtil.Sort{ H-K,Q%;C@  
;H9d.D8  
/* (non-Javadoc) :<Yc V#!P  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @kK${  
*/ Yc/Nz(m  
public void sort(int[] data) { k-@CcrepF  
for(int i=data.length/2;i>2;i/=2){ TPZZln'3   
for(int j=0;j insertSort(data,j,i); /d ?)  
} ,a9<\bd)  
} Vv~rgNh  
insertSort(data,0,1); ,^3eMn  
} {s6;6>-kPW  
9[N+x2q  
/** lX/6u E_%  
* @param data dq%7A=-  
* @param j jhr{JApbJv  
* @param i u.YPb@  
*/ g4cmYg3  
private void insertSort(int[] data, int start, int inc) { *z!!zRh3x  
int temp; m64 6|G5  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); J*Dj`@`4`g  
} -9Wx;u4]o  
} oj /:  
} S0eD 2  
6UXa 5t  
} (Hb i+IHV  
US A!N  
快速排序: X2hV)8Sk  
x]&V7Y   
package org.rut.util.algorithm.support; $`W .9  
U$@p"F@P  
import org.rut.util.algorithm.SortUtil; )sWdN(E3  
axW3#3#`  
/** -yHVydu=  
* @author treeroot RUC V!L  
* @since 2006-2-2 *lRP ZN  
* @version 1.0 /Y_F"GQ  
*/ TK<~ (Dk  
public class QuickSort implements SortUtil.Sort{ dPwe.:  
3 [: x#r  
/* (non-Javadoc) $=uyZTYF)}  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }A3(g$8KR  
*/ |FG t'  
public void sort(int[] data) { b&f;p}C24  
quickSort(data,0,data.length-1); hPLQ)c?   
} ^B8%Re%  
private void quickSort(int[] data,int i,int j){ $p30?\  
int pivotIndex=(i+j)/2; -Qgu 6Ty  
file://swap ]S<y,d-  
SortUtil.swap(data,pivotIndex,j); O?/\hZ"&c  
i% 19|an  
int k=partition(data,i-1,j,data[j]); n&Bolt(tO  
SortUtil.swap(data,k,j); e;\g[^U  
if((k-i)>1) quickSort(data,i,k-1); - } \g[|  
if((j-k)>1) quickSort(data,k+1,j); C2NJrg4(  
 m/gl7+  
} p8o ~  
/** jU |0!]  
* @param data Y4e64`V)  
* @param i h?5$-#q~  
* @param j  s.&ewf\  
* @return C8>zr6)1  
*/ S'#KPzy.  
private int partition(int[] data, int l, int r,int pivot) { ye=*m  
do{ 0 {#c  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); "vQ$RW -  
SortUtil.swap(data,l,r); 0|E!e  
} Oaf!\ z}  
while(l SortUtil.swap(data,l,r); I9O!CQCTt  
return l; +O>!x#)&"  
} 0l#gS;  
s1. YH?A;  
} `W,gYH7  
6AV@O  
改进后的快速排序:  KoVy,@  
]BGWJA5  
package org.rut.util.algorithm.support; 8mI eW  
g N76  
import org.rut.util.algorithm.SortUtil; Jy?s'tc  
K-(k6<h  
/** ,6:ya8vB  
* @author treeroot n=!]!'h\:  
* @since 2006-2-2 $o"S zy  
* @version 1.0 V1 T?T9m  
*/ (1p[K-J)r  
public class ImprovedQuickSort implements SortUtil.Sort { <;< _f U  
>U.TkB  
private static int MAX_STACK_SIZE=4096; |3`Sd;^;  
private static int THRESHOLD=10; u~FXO[b  
/* (non-Javadoc) j H#Tt;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aTF~rAne<  
*/ t<s:ut)Q!  
public void sort(int[] data) { N)|mA)S)  
int[] stack=new int[MAX_STACK_SIZE]; L1ZhH3}X  
n*~=O'  
int top=-1; ,DsqKXSU  
int pivot; Hv2t_QjKT  
int pivotIndex,l,r; I} a`11xb`  
k?ubr)[)  
stack[++top]=0; gjB36R  
stack[++top]=data.length-1; }PdS?[R  
nTxeV%  
while(top>0){  *X- 6]C  
int j=stack[top--]; 0Ou;MU*v  
int i=stack[top--]; S\=j; Uem  
jq#gFt*  
pivotIndex=(i+j)/2; 0; GnR0  
pivot=data[pivotIndex]; aHx(~&hRcL  
9[K".VeT]  
SortUtil.swap(data,pivotIndex,j);  C[MZ9 r  
|6/k2d{,(  
file://partition A8 V7\  
l=i-1; O|j(CaF  
r=j; #T:#!MKa  
do{ 6Yhd[I3  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); d#E]>:w9  
SortUtil.swap(data,l,r); 5VI c  
} )jk X&7x  
while(l SortUtil.swap(data,l,r); ?,~B@Kx  
SortUtil.swap(data,l,j); J%`-K"NB  
(#x <qi,T  
if((l-i)>THRESHOLD){ .w=( G  
stack[++top]=i; ;v%Fw!b032  
stack[++top]=l-1; HnU; N S3J  
} |hms'n0  
if((j-l)>THRESHOLD){ K s 8  
stack[++top]=l+1; 5ZeE& vG2  
stack[++top]=j; m?cC0(6  
} 1xN6V-qk  
z%-Yz- G9  
} iIWz\FM  
file://new InsertSort().sort(data); 5|S|S))_Q  
insertSort(data); Pqiw[+a$  
} L1=+x^WQ  
/** T\7z87Q  
* @param data w@w(AFV9/  
*/ vf6_oX<Os  
private void insertSort(int[] data) { |hBX"  
int temp; e0iE6:i  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ( HCB\!g  
} R~OameRR  
} {(;dHF%{  
} mLApF5Hy  
:xOne<@  
} wG;#L7%  
1OB,UU"S$  
归并排序: OUCL tn\  
c'M#va  
package org.rut.util.algorithm.support; #x-@ >{1k&  
u!I Es  
import org.rut.util.algorithm.SortUtil; sXHrCU  
T"7Ue  
/** EC(,-sz\Z  
* @author treeroot ZC}'! $r7  
* @since 2006-2-2 cQ( zBf  
* @version 1.0 &)jBr^x#>  
*/ Q;r9>E!  
public class MergeSort implements SortUtil.Sort{ 48;6C g  
rg Gm[SL*<  
/* (non-Javadoc) m(MPVY<X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [vMksHk4  
*/ $|+q9 o\  
public void sort(int[] data) { 0/{$5gy&  
int[] temp=new int[data.length]; .B 2?%2S  
mergeSort(data,temp,0,data.length-1); AX6z4G  
} HKu? J  
{ No*Z'X  
private void mergeSort(int[] data,int[] temp,int l,int r){ x'IVP[xh`A  
int mid=(l+r)/2; 8m% +O#  
if(l==r) return ; GJ YXCi  
mergeSort(data,temp,l,mid); hBb&-/  
mergeSort(data,temp,mid+1,r); wdS4iQD  
for(int i=l;i<=r;i++){ lAjP'(  
temp=data; ffMh2   
} ZH'- >/  
int i1=l; <T]BSQk  
int i2=mid+1; c@H_f  
for(int cur=l;cur<=r;cur++){ wz1fx>Q  
if(i1==mid+1) /^_~NF#  
data[cur]=temp[i2++]; &5JTcMC^  
else if(i2>r) +ob<? T  
data[cur]=temp[i1++]; 9 0PF)U  
else if(temp[i1] data[cur]=temp[i1++]; tQ!p<Q= $)  
else ee7#PE]}  
data[cur]=temp[i2++]; |'@c ~yc  
} `PML 4P[  
} }dnO7K  
cuv?[ M  
} kU uDA><1  
+/!kL0[v  
改进后的归并排序: Ik{[BRzUgt  
@tv3\eD  
package org.rut.util.algorithm.support; \HR<^xY  
b4TZnO  
import org.rut.util.algorithm.SortUtil; ODS8bD0!i  
X|o;*J](  
/** b| e7mis@  
* @author treeroot yGGQ;!/  
* @since 2006-2-2 $|J16tW  
* @version 1.0 tJ:]ne   
*/ ey'x3s_  
public class ImprovedMergeSort implements SortUtil.Sort { uZ[7[mK}n7  
P .I <.e  
private static final int THRESHOLD = 10; :|j,x7&/{  
T-" zK r!  
/* gz{~\0y  
* (non-Javadoc) ~W?F.  
* y"N7r1Pf  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >%qk2h>  
*/ -P I$SA,  
public void sort(int[] data) { DeqTr:  
int[] temp=new int[data.length]; kR+xInDM*  
mergeSort(data,temp,0,data.length-1); CKC%|xke  
} y2"PKBK\_  
05$;7xnf(  
private void mergeSort(int[] data, int[] temp, int l, int r) { ^]nnvvp  
int i, j, k; sZ~q|}D-  
int mid = (l + r) / 2; LW+a-i  
if (l == r) um/2.Sn>  
return; $U3|.4  
if ((mid - l) >= THRESHOLD) E0F8FR'  
mergeSort(data, temp, l, mid); P''5A6#5  
else 2oY.MQD7iW  
insertSort(data, l, mid - l + 1); 4J#F;#iA  
if ((r - mid) > THRESHOLD) +y%"[6c|  
mergeSort(data, temp, mid + 1, r); lrn3yDkR?  
else CcF$?07 i  
insertSort(data, mid + 1, r - mid); c!,&]*h"k  
R^_7B(  
for (i = l; i <= mid; i++) { q> ;u'3}  
temp = data; PvmmyF  
} }b$?t7Q)  
for (j = 1; j <= r - mid; j++) { G8]DK3#  
temp[r - j + 1] = data[j + mid]; j$2rU'  
} cJ CKxj  
int a = temp[l]; +ZuT\P&kR5  
int b = temp[r]; OR{<)L  
for (i = l, j = r, k = l; k <= r; k++) { qG=?+em  
if (a < b) { 977%9z<h  
data[k] = temp[i++]; +Ce[OG.  
a = temp; M84{u!>[  
} else { 1|]IWX|  
data[k] = temp[j--]; Vjv~RNGF  
b = temp[j]; 1 _A B; ^  
} nC-=CMWWr  
} k,) xv?  
} zWN/>~}U \  
$P=B66t ^  
/** + F{hFuHV  
* @param data D'{NEk@  
* @param l  18(hrj  
* @param i 2(SU# /,  
*/ <>gX'te  
private void insertSort(int[] data, int start, int len) { TH;kJ{[}  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ny(`An  
} ;$`5L"I5$  
} Qqp_(5S|>  
} 4*j6~  
} |@84l  
dA)JR"r2  
堆排序: o'oA.'ul  
(8Q0?SZN  
package org.rut.util.algorithm.support; tl:V8sYTP  
+"sjkdum1  
import org.rut.util.algorithm.SortUtil; 4trP*u,4  
Ry$zF~[   
/** W0zRV9"P  
* @author treeroot ]xx}\k  
* @since 2006-2-2 F&tU^(7<  
* @version 1.0 i~};5j(  
*/ ]lX`[HX7  
public class HeapSort implements SortUtil.Sort{ xz$-_NWW  
C:*=tD1  
/* (non-Javadoc) %anY'GK   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fU6O:-  
*/ {Xw6]d  
public void sort(int[] data) { 3MmpB9l#H  
MaxHeap h=new MaxHeap(); (D\7EH\9,]  
h.init(data); n@TK}?\UoR  
for(int i=0;i h.remove(); Su4&qY  
System.arraycopy(h.queue,1,data,0,data.length); )bd)noZi  
} QR ?JN\%?  
nrhzNW>]  
private static class MaxHeap{ :4Gc'b R  
qjcPJ  
void init(int[] data){ @r.w+E=  
this.queue=new int[data.length+1]; n7|8`? R^  
for(int i=0;i queue[++size]=data; p)u?x)w=  
fixUp(size); [~aRA'qJ{V  
} Q)/V >QW  
} H^VNw1.   
S7B7'[ru  
private int size=0; >/]` f8^  
/?ZO-]q  
private int[] queue; B4D#T lB  
Oc6_x46S4  
public int get() { ifXGH>C  
return queue[1]; EZ"n3#/  
} @5["L  
8Q{"W"]O7  
public void remove() { NsPAWI|4  
SortUtil.swap(queue,1,size--); %Tv2op  
fixDown(1); *]7$/%.D  
} -ho%9LW%|  
file://fixdown 8[k:FGp>  
private void fixDown(int k) { 5 O't-'  
int j; <UEta>jj  
while ((j = k << 1) <= size) { Daw;6f:  
if (j < size %26amp;%26amp; queue[j] j++; @QN(ouqQ  
if (queue[k]>queue[j]) file://不用交换 A_y]6~Mu?~  
break; Nv~H797B  
SortUtil.swap(queue,j,k); $_ BoG  
k = j; ~6Xr^An/Z  
} d3[O!4<T  
} >=6 j:  
private void fixUp(int k) { h 7P<3m}  
while (k > 1) { n@JZ2K4  
int j = k >> 1; '^{:HR#i  
if (queue[j]>queue[k]) nF)b4`Nd  
break; f@j)t%mh  
SortUtil.swap(queue,j,k); _.{I1*6Y2  
k = j; >1$ vG  
} @W1F4HYds  
} 2Y7u M;8  
n9%&HDl4  
} b2tUJ2p  
ppP0W `p  
} R<L<kChg  
RPB%6z$  
SortUtil: t:O"t G  
KLBX2H2^0  
package org.rut.util.algorithm; ( kKQs")  
^. p d'  
import org.rut.util.algorithm.support.BubbleSort; Wik8V0(  
import org.rut.util.algorithm.support.HeapSort; W>o>Y$H  
import org.rut.util.algorithm.support.ImprovedMergeSort; W{i s2s  
import org.rut.util.algorithm.support.ImprovedQuickSort; O a%ZlEUF  
import org.rut.util.algorithm.support.InsertSort; 8Y,imj\(v  
import org.rut.util.algorithm.support.MergeSort; xU!eT'Y  
import org.rut.util.algorithm.support.QuickSort; 0! W$Cz[  
import org.rut.util.algorithm.support.SelectionSort; /Xm4%~b_gj  
import org.rut.util.algorithm.support.ShellSort; ;ztt*py  
(M-W ea!q  
/** ln2lFfz  
* @author treeroot %K[u  
* @since 2006-2-2 qRc Y(mb  
* @version 1.0 Q H 57[Yg  
*/ >Y6iLQ$X  
public class SortUtil { 7C>5XyyJ  
public final static int INSERT = 1; L)z`  
public final static int BUBBLE = 2; 1EemVZdY  
public final static int SELECTION = 3; +B&,$ceyaJ  
public final static int SHELL = 4; '* eeup  
public final static int QUICK = 5; P?o|N<46  
public final static int IMPROVED_QUICK = 6; | zyO;  
public final static int MERGE = 7; 0,]m.)ws  
public final static int IMPROVED_MERGE = 8; f.G"[p  
public final static int HEAP = 9; Js'j}w  
tJvs ?eZ)  
public static void sort(int[] data) { #/0d  
sort(data, IMPROVED_QUICK); O>3f*Cc  
} pGdFeEkB/  
private static String[] name={ "qdEu KI  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %F}i2!\<L  
}; I/hq8v~S  
!zQbF&>  
private static Sort[] impl=new Sort[]{ hd1aNaF-  
new InsertSort(), l 2ARM3"  
new BubbleSort(), +pY-- 5t  
new SelectionSort(), tyU'[LF?  
new ShellSort(), ?p'DgL{  
new QuickSort(), c0v6*O)  
new ImprovedQuickSort(), mXOY,g2w  
new MergeSort(), U}R (  
new ImprovedMergeSort(), K"/3/`T  
new HeapSort() +GvPJI  
}; x(+H1D\W   
bV&"jjEx  
public static String toString(int algorithm){ >e^^YR^  
return name[algorithm-1]; 'w8p[h (,  
} VCX^D)[-  
Y[rRz6.*(  
public static void sort(int[] data, int algorithm) { f;=<$Y>i  
impl[algorithm-1].sort(data); ,92wW&2  
} ]ne  
isU4D  
public static interface Sort { Q*ixg$>  
public void sort(int[] data); \P;2s<6i\  
} jdX *  
)wNcz~ Y  
public static void swap(int[] data, int i, int j) { [?55vYt  
int temp = data; )m$MC25  
data = data[j]; &&ZX<wOM  
data[j] = temp; dCA! R"HD  
} X#k:J  
} g `(3r  
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