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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。 'H)l~L  
插入排序: KGsW*G4U=  
(#VF>;;L  
package org.rut.util.algorithm.support; Bt1 &C?_$T  
Tsl0$(2W  
import org.rut.util.algorithm.SortUtil; few=`%/  
/** m; m4/z3U  
* @author treeroot o3xfif  
* @since 2006-2-2 P:tl)ob  
* @version 1.0 bPo*L~xdk  
*/ H_+!.  
public class InsertSort implements SortUtil.Sort{ 6ZwFU5)QE/  
q@&.)sLPgO  
/* (non-Javadoc) UZ3oc[#D=]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .[hbiv#  
*/ e(;nhU3a*,  
public void sort(int[] data) { I DtGtkF  
int temp; Zmr*$,v<y  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); sp&)1?!M  
} bx%P-r31  
} t 4tXLI;'  
} CsW*E,|xyP  
H2D j`0  
} 7EukrE<b'  
4@ =l'Fw  
冒泡排序: mp+lN:  
a>/jW-?  
package org.rut.util.algorithm.support; 2=ZZR8v  
_+x&[^gjP  
import org.rut.util.algorithm.SortUtil; o9D]\PdL>  
F` gQ[  
/** $XO#qOW  
* @author treeroot -~ 5|_G2Y"  
* @since 2006-2-2 4.0JgX  
* @version 1.0 o 2sOf  
*/ O)WduhlGQ  
public class BubbleSort implements SortUtil.Sort{ kpt 0spp  
UXN!iU)  
/* (non-Javadoc) 7s-ZRb[)1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C`>|D [  
*/ VLfE3i4Vwl  
public void sort(int[] data) { )4/227b/(  
int temp; 7SpF&  
for(int i=0;i for(int j=data.length-1;j>i;j--){ vTF_`X  
if(data[j] SortUtil.swap(data,j,j-1); ;*_U)th  
} I%fz^:[#<  
} 6K zdWT  
}  2t7Hu)V  
} rezH5d6z62  
= ;"$t_t  
} H3Z"u  
_/zK ^S)  
选择排序: WQT;k0;T]  
_N&]w*ce  
package org.rut.util.algorithm.support; K,\Bj/V(  
rxJWU JMxK  
import org.rut.util.algorithm.SortUtil; ^@0-E@ {c  
+r 2\v  
/** Sxw%6Va]p  
* @author treeroot hWqI*xSaJ  
* @since 2006-2-2 " O,TL *$  
* @version 1.0 Q\4nduQ  
*/ NiTLQ"~e  
public class SelectionSort implements SortUtil.Sort { (`pd>  
I%<,JRAV  
/* L_WVTz?`  
* (non-Javadoc) G[=8Ko0U+n  
* {_i.IPp~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |p7k2wzN  
*/ ;+/[<bvd"  
public void sort(int[] data) { ,/P)c*at5  
int temp; O-ZB4hN8  
for (int i = 0; i < data.length; i++) { |p1 pa4%}  
int lowIndex = i; 0aS&!"o!  
for (int j = data.length - 1; j > i; j--) { C3 m#v[+  
if (data[j] < data[lowIndex]) { (Mw<E<f  
lowIndex = j; !@<>S>uGG  
} &J~%Nt  
} W~&PGmRI  
SortUtil.swap(data,i,lowIndex); ihr l!A5  
} z a^s%^:yK  
}  #FfUkV  
:6Q`! in  
} 4vk^=  
cPgz?,hE  
Shell排序: 0Tm"Zh?B|  
ja2PmPv  
package org.rut.util.algorithm.support; TdAHw @(  
-UM5&R+o  
import org.rut.util.algorithm.SortUtil; @9!,]n  
K{)YnY_E;  
/** E"P5rT  
* @author treeroot xgeKz^,  
* @since 2006-2-2 75pz' Cb  
* @version 1.0  #' =rv  
*/ ;|e6Qc9  
public class ShellSort implements SortUtil.Sort{  j`9+pI  
MFyMo  
/* (non-Javadoc) 'h6Vj6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gv};mkX[N  
*/ aDik1Q  
public void sort(int[] data) { p2UZqq2  
for(int i=data.length/2;i>2;i/=2){ Gu3'<hTlxd  
for(int j=0;j insertSort(data,j,i); -O ro$=%  
} LK^t ](F  
} !%x=o&  
insertSort(data,0,1); Z~-A*{u?  
} \y%:[g}Fvw  
 /_r g*y*  
/** jR^>xp;  
* @param data AF qut  
* @param j > qSaF  
* @param i / !*gH1 s  
*/ p?X`f#  
private void insertSort(int[] data, int start, int inc) { I+Q`i:\,q  
int temp; :X`Bc"  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); F+`DfI]/m  
} 3??*G8Yp  
}  jJjD)  
} *Iu .>nw  
2HNH@K  
} $z9z'^HqO  
Qhd~4  
快速排序: 7x%0 ^~/n  
%0PZZl5b  
package org.rut.util.algorithm.support; Hset(-=X  
C<.t'|  
import org.rut.util.algorithm.SortUtil; 7b_Ihv   
=~&Fq$$  
/** BW>f@;egg  
* @author treeroot J jCzCA:K_  
* @since 2006-2-2 uxq!kF'Ls  
* @version 1.0 'CDRb3w}B  
*/ [1Dg_>lz  
public class QuickSort implements SortUtil.Sort{ ql%>)k /x  
)p MZ5|+X  
/* (non-Javadoc) -L/5Nbup  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S? }@2[  
*/ UN&b]vg  
public void sort(int[] data) { iaR^]|7_  
quickSort(data,0,data.length-1); ^ ,Bxq^'D  
} 0VV1!g  
private void quickSort(int[] data,int i,int j){ Kl[WscR  
int pivotIndex=(i+j)/2; P]Z}% 8^O  
file://swap 4"e7 43(  
SortUtil.swap(data,pivotIndex,j); <!\J([NM8  
JF>mybB  
int k=partition(data,i-1,j,data[j]); wovWEtVBU  
SortUtil.swap(data,k,j); K5Fzmo a  
if((k-i)>1) quickSort(data,i,k-1); Kfc(GL?  
if((j-k)>1) quickSort(data,k+1,j); ;APpgt4  
!U$ %Jz  
} 7 :s6W%W1*  
/** _4z>I/R>Z  
* @param data 39 JLi~j,  
* @param i snTj!rV/_  
* @param j GYiUne $  
* @return AZ5c^c)  
*/ @:i>q$aF  
private int partition(int[] data, int l, int r,int pivot) { >RxZ-.,a  
do{ +fzZ\  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 17G7r\iNYq  
SortUtil.swap(data,l,r); Mg95us  
} FuaGr0]  
while(l SortUtil.swap(data,l,r); EOV<|WF>  
return l; =o=)EU{~  
} =,I,K=+_x  
vKDPg p<j  
} 8oY0?|_Bx  
{S\cpCI`  
改进后的快速排序: Zx<s-J4o=w  
Z{RgpVt  
package org.rut.util.algorithm.support; hNFMuv  
Dw{C_e  
import org.rut.util.algorithm.SortUtil; yPm)r2Ck  
xYM! mcA  
/** "P< drz<  
* @author treeroot _y`'T;~OY  
* @since 2006-2-2 A0S6 4(  
* @version 1.0 9 4W9P't  
*/ qO>BF/)a(  
public class ImprovedQuickSort implements SortUtil.Sort { 2:i`,  
*D]/V U  
private static int MAX_STACK_SIZE=4096; kaUH#;c>_  
private static int THRESHOLD=10; =#1iio&  
/* (non-Javadoc) D6_16PJE  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 33couAP#  
*/ }?>30+42:  
public void sort(int[] data) { z]\0]i  
int[] stack=new int[MAX_STACK_SIZE]; lbg!B4,  
|U$oS2U\m  
int top=-1; ,Mc}U9)F  
int pivot; &nj@t>5Bs$  
int pivotIndex,l,r; hW>@jT"t1C  
Kd;|Z  
stack[++top]=0; qX:54$t  
stack[++top]=data.length-1; g<KBsz!{  
Czb@:l%sc  
while(top>0){ E](Ood  
int j=stack[top--]; w0moC9#$?  
int i=stack[top--]; _}`iLA!$I  
y{K~g<VL  
pivotIndex=(i+j)/2; wamqeb{u  
pivot=data[pivotIndex]; " I`<s<  
`-Gs*#(/  
SortUtil.swap(data,pivotIndex,j); Tb}`]Y`X  
V# w$|B\  
file://partition o?^j1\^  
l=i-1; 'fcJ]%-=  
r=j; 4jis\W}%L3  
do{ if:2sS9r  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); i/oaKpPN  
SortUtil.swap(data,l,r); S! ,.#e(Y  
} ctdV4%^{  
while(l SortUtil.swap(data,l,r); RIl%p~  
SortUtil.swap(data,l,j); )e9(&y*o  
9+=U&*  
if((l-i)>THRESHOLD){ sP5PYNspA  
stack[++top]=i; s qac>v  
stack[++top]=l-1; &^qD<eZ!Eq  
} 3j<] W  
if((j-l)>THRESHOLD){ &{y- }[~  
stack[++top]=l+1; u;~/B[  
stack[++top]=j; sEe^:aSN  
} <J{VTk ~  
tB}&-U|t[~  
} y| @[?B  
file://new InsertSort().sort(data); (EuHQ &<^9  
insertSort(data); wC<!,tB(8  
} XkuNLs4  
/** im%'S6_X4  
* @param data "=9L7.E)  
*/ -UPdgZ_Vxz  
private void insertSort(int[] data) { 6/s#'#jh  
int temp; R S;r  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); x1$fkNu  
} aQ]C`9k  
} #=7~.Y  
} sqJ?dIBH  
#\@*C=  
} E;D9S  
e][U ;  
归并排序: IR(JBB|xNQ  
GJ ZT~  
package org.rut.util.algorithm.support; 6/.-V1*O  
#Cvjv; QwY  
import org.rut.util.algorithm.SortUtil; Bz9!a k~4  
JL`n12$m  
/** *8,]fBUq  
* @author treeroot noOG$P#  
* @since 2006-2-2 @\z2FJ79w  
* @version 1.0 LJfd{R1y+  
*/ !4]w b!F  
public class MergeSort implements SortUtil.Sort{ ui YZk3  
q*?LXKi  
/* (non-Javadoc) PRWS[2[yk  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2m[z4V@`  
*/ E]6;nY?  
public void sort(int[] data) { C:l /%   
int[] temp=new int[data.length]; I r<5%  
mergeSort(data,temp,0,data.length-1); e6QUe.S  
} rC[*x}  
g15e|y)th  
private void mergeSort(int[] data,int[] temp,int l,int r){ j5G8IP_Wx  
int mid=(l+r)/2; `kVy1WiY  
if(l==r) return ; C:0Ra^i ?L  
mergeSort(data,temp,l,mid); DE^{8YX,  
mergeSort(data,temp,mid+1,r); +VI2i~  
for(int i=l;i<=r;i++){ vv"_u=H  
temp=data; #l+U(zH:JG  
} xQ^zX7  
int i1=l;  $3W[fC  
int i2=mid+1; ygWo9?  
for(int cur=l;cur<=r;cur++){ iZwt,)(  
if(i1==mid+1) UOy`N~\gh+  
data[cur]=temp[i2++]; N'i%9SBcg  
else if(i2>r) a5:YP  
data[cur]=temp[i1++]; a~9U{)@F  
else if(temp[i1] data[cur]=temp[i1++]; nRPy)L{  
else f,k'gM{K  
data[cur]=temp[i2++]; t(/e~w  
} +I;b,p  
} 8uchp  
xCEEv5(5  
} #K"jtAm  
7Xw;TA  
改进后的归并排序: # ~} 26  
`QnKal)  
package org.rut.util.algorithm.support; )d2 <;c  
4T{+R{_Y1  
import org.rut.util.algorithm.SortUtil; #78p# E  
.`)\GjDv  
/** m5v9:5{  
* @author treeroot XWf8ZZj  
* @since 2006-2-2 6 GO7[?U<  
* @version 1.0 m`}! dBi  
*/ 8G6PcTqv"  
public class ImprovedMergeSort implements SortUtil.Sort { -shS?kV  
9H_2Y%_  
private static final int THRESHOLD = 10; 8&IsZPq%l  
\=kH7 !  
/* T\{ on[O  
* (non-Javadoc) \rF6"24t6  
* Nh^T,nv*l  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X2}\i5{  
*/ hJ (Q^Z  
public void sort(int[] data) { 5IOOVYl  
int[] temp=new int[data.length]; ` {gkL-  
mergeSort(data,temp,0,data.length-1); lQ<2Vw#Yl  
} rh5R kiF~  
=!*e; L  
private void mergeSort(int[] data, int[] temp, int l, int r) { j#f+0  
int i, j, k; N/p9Ws  
int mid = (l + r) / 2; 2%m H  
if (l == r) 0~iC#lHO  
return; ryB^$Kh,,  
if ((mid - l) >= THRESHOLD) eB%KXPhMm  
mergeSort(data, temp, l, mid); AE={P*g  
else 8V`NQS$  
insertSort(data, l, mid - l + 1); 9TIyY`2!  
if ((r - mid) > THRESHOLD) ,^pM]+NF|  
mergeSort(data, temp, mid + 1, r); %[u6<  
else Kyt.[" p  
insertSort(data, mid + 1, r - mid); !hrXud=#"  
9%S{fd\#  
for (i = l; i <= mid; i++) { <Bn^+u\  
temp = data; : ^F+m QN  
} 5x(`z   
for (j = 1; j <= r - mid; j++) { AjKP -[  
temp[r - j + 1] = data[j + mid]; J;W(}"cFq  
} x%pC.0%  
int a = temp[l]; g{.>nE^Sc5  
int b = temp[r]; :!Wijdq  
for (i = l, j = r, k = l; k <= r; k++) { I?YTX  
if (a < b) { Dd-;;Y1C  
data[k] = temp[i++]; +FfT)8@W  
a = temp; \_Nr7sc\  
} else { 5+vCuVZ  
data[k] = temp[j--]; |Zr5I";  
b = temp[j]; ;5:g%Dt  
} &tB|l_p_-p  
} 4EQ7OGU  
} MqGF~h|+  
 Zf68 EB  
/** 'b:e`2fl  
* @param data ;2Db/"`t  
* @param l e^&QT  
* @param i 'Y IFHn$!  
*/ M$DJ$G|Z  
private void insertSort(int[] data, int start, int len) { {hGr`Rh  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +c.A|!-  
} l=8)_z;~D  
} 9uV/G7Geq  
} \(Dq=UzQI  
} xphw0Es  
(# Z2  
堆排序: ,],"tzKtE  
K QXw~g?  
package org.rut.util.algorithm.support; 8 !Pk1P  
I+Qv$#S/  
import org.rut.util.algorithm.SortUtil; w$n\`rQ  
sOg@9-_Uh  
/** S(9Xbw)T  
* @author treeroot [HI&>dm=$  
* @since 2006-2-2 ]wh8m1  
* @version 1.0 I<e[/#5P\`  
*/ / d=i 0E3  
public class HeapSort implements SortUtil.Sort{ r=Z#"68$  
,Xs%Cg_Ig  
/* (non-Javadoc) vo )pT  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4!p ~Mr[E  
*/ 7Fw`s@/%  
public void sort(int[] data) { u*B.<GmN  
MaxHeap h=new MaxHeap(); 0,)B~|+  
h.init(data); W{O:j  
for(int i=0;i h.remove(); 8J{I6nPF  
System.arraycopy(h.queue,1,data,0,data.length); 8>S"aHt 7  
} L&=j O0_  
A`v(hBM  
private static class MaxHeap{ %VOn;_Q*B  
F]]np&UV.  
void init(int[] data){ ,B%M P<Rz1  
this.queue=new int[data.length+1]; xB_F?d40T5  
for(int i=0;i queue[++size]=data; #/$}zl  
fixUp(size); ["- pylhK  
} ;j])h !8X  
} k@JDG]R<{  
<MZ$baK  
private int size=0; &dF$:$'s  
Rn~FCj,-  
private int[] queue; vZj^&/F$=g  
mA}-hR%  
public int get() { Q}FDu,  
return queue[1]; J\<7M8   
} ^'.=&@i-  
>8Wvz.Nq/  
public void remove() { JYL/p9K[I  
SortUtil.swap(queue,1,size--); $gT+Ue|7  
fixDown(1); jXvGL  
} 3p{N7/z(  
file://fixdown )k01K,%#)  
private void fixDown(int k) { pA%XqG*=Y  
int j; lS]<~  
while ((j = k << 1) <= size) { $3S6{"  
if (j < size %26amp;%26amp; queue[j] j++; j89|hG)2  
if (queue[k]>queue[j]) file://不用交换 tRRPNY  
break; LuY`mi  
SortUtil.swap(queue,j,k); %[\: 8  
k = j; jK/2n}q&]  
} H1_XEcaM+*  
} s|rlpd4y  
private void fixUp(int k) { (__=*ew  
while (k > 1) { 4)BZ%1+  
int j = k >> 1; bhe~ekb  
if (queue[j]>queue[k]) D.Rk{0se8  
break; .NcoST9a  
SortUtil.swap(queue,j,k); wLC!vX.S  
k = j; wH=  
} 4@OnMj{M  
}  G7 >  
rs {e6  
} !Rk1q&U5  
y ,isK  
} `l@[8H%aw  
(oX|lPD<b  
SortUtil: fx %Y(W#5  
0#4_vg .  
package org.rut.util.algorithm; ;l> xXSB7$  
F +PIZ%  
import org.rut.util.algorithm.support.BubbleSort; _a@&$NEox  
import org.rut.util.algorithm.support.HeapSort; (rO_ Vfaa  
import org.rut.util.algorithm.support.ImprovedMergeSort; F>jPr8&  
import org.rut.util.algorithm.support.ImprovedQuickSort; V&vU her0  
import org.rut.util.algorithm.support.InsertSort; E]w1!Ah M  
import org.rut.util.algorithm.support.MergeSort; 'Wjuv9)/  
import org.rut.util.algorithm.support.QuickSort; H `y.jSNi  
import org.rut.util.algorithm.support.SelectionSort; v1<gNb)`  
import org.rut.util.algorithm.support.ShellSort; `bu3S }m7  
Af1izS3  
/** ~R/w~Kc!/A  
* @author treeroot _H}y7  
* @since 2006-2-2 %])-+T  
* @version 1.0 y[[f?rxz>  
*/ H .)}|  
public class SortUtil { DLcfOOn1I  
public final static int INSERT = 1; JPfNf3<@My  
public final static int BUBBLE = 2; wVkms  
public final static int SELECTION = 3; IK5FSN]s/  
public final static int SHELL = 4; L,!?'.*/]  
public final static int QUICK = 5; #m?GBr%k  
public final static int IMPROVED_QUICK = 6; W[PZQCL}K)  
public final static int MERGE = 7; @Tb T  
public final static int IMPROVED_MERGE = 8; 9|WBJ6  
public final static int HEAP = 9; _'<V<OjVM!  
g0Qg]F5D~  
public static void sort(int[] data) { - {<`Z  
sort(data, IMPROVED_QUICK); !O F#4N  
} ~r;da9  
private static String[] name={ 5MV4N[;  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _d6mf4M]5  
}; -B :Z(]3#\  
FP<RoA? W  
private static Sort[] impl=new Sort[]{ KJWYG^zI  
new InsertSort(), 9+@"DuYc6  
new BubbleSort(), P`6 T;|VDk  
new SelectionSort(), {`QF(WL  
new ShellSort(), ^Dhj<_  
new QuickSort(), o^dt# &  
new ImprovedQuickSort(), S+H#^WSt  
new MergeSort(), c\FyX\ i  
new ImprovedMergeSort(), Sxf|gDC  
new HeapSort() !e@G[%k  
}; rubqk4  
}'$6EgX  
public static String toString(int algorithm){ GlP [:  
return name[algorithm-1]; S_LY>k?  
} vb/*ILS  
G~_5E]8  
public static void sort(int[] data, int algorithm) { HVz-i{M  
impl[algorithm-1].sort(data); F48:mfj1r  
} F7a &-  
NHA 2 i  
public static interface Sort { Gir_.yc/  
public void sort(int[] data); 9\3%5B7  
} #b\&Md|;  
cd{3JGg B  
public static void swap(int[] data, int i, int j) { 8yz A W&q  
int temp = data; GDw4=0u-  
data = data[j]; )|,-l^lC  
data[j] = temp; zYpIG8"o5  
} o O%!P<D  
} Jpg_$~k  
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