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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。 +kQ$X{+;8  
插入排序: ,`MUd0 n  
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package org.rut.util.algorithm.support; grnlJ=  
do%6P^ qA  
import org.rut.util.algorithm.SortUtil; 2|Hq[c=~  
/** RpR;1ktF>  
* @author treeroot a%sr*`  
* @since 2006-2-2 ED @9,W0  
* @version 1.0 Dw?nf  
*/ =ex71qj)  
public class InsertSort implements SortUtil.Sort{ NS;,(v{*N  
X[ }5hZcX  
/* (non-Javadoc) uG2Hzav  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O[;>Y'zqC%  
*/ uJm9h(xq  
public void sort(int[] data) { a}+|2k_  
int temp; vVmoV0kGt  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); =zt@*o{F  
} )avli@W-3j  
} *)ZDN~z7o  
} sV'(y>PP%  
X4lz?Y:*  
} TP[<u-@G  
! iA0u  
冒泡排序: Uo<d]4p $  
+glT5sOk  
package org.rut.util.algorithm.support; gEMxK2MNXj  
{?17Zth  
import org.rut.util.algorithm.SortUtil; :03w k)  
6+e@)[l.zc  
/** <l(LQmM;  
* @author treeroot 1p<m>s=D=e  
* @since 2006-2-2 hdp;/Qz&  
* @version 1.0 #7+oM8b  
*/ 34Q l7LQp[  
public class BubbleSort implements SortUtil.Sort{ KQj5o>} 6  
*pCT34'--  
/* (non-Javadoc) |[;9$Vn  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +HQX]t:Y  
*/ Ua)ARi %  
public void sort(int[] data) { B)O{+avu  
int temp; (hS j4Cp  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ds,NNN<HW  
if(data[j] SortUtil.swap(data,j,j-1); 9sifc<za  
} "m.jcKt  
} u1xCn\  
} 0~Z >}(  
} Ro`9Ibqr  
yf*^Y74  
} De@GNN"-  
,8nu%zcVn  
选择排序: ] hGU.C"(  
u;GS[E4  
package org.rut.util.algorithm.support; #!l\.:h%  
V<Q''%k  
import org.rut.util.algorithm.SortUtil; LWuciHfd+  
V6B`q;lA  
/** j]#qq]c  
* @author treeroot qI"Xh" c?  
* @since 2006-2-2 bf|s=,D  
* @version 1.0 %{WS7(si  
*/ 9}p?h1NrY  
public class SelectionSort implements SortUtil.Sort { J wL}|o6  
OZ3iH%  
/* oW3j|V  
* (non-Javadoc) Z1 %"w*U  
* $' }rBPA/  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D]\of#%T  
*/ V}o`9R@tx}  
public void sort(int[] data) { V6P2W0 m  
int temp; ZgK[,<2  
for (int i = 0; i < data.length; i++) { xr}3vJ7  
int lowIndex = i; ]KdSwIbi  
for (int j = data.length - 1; j > i; j--) { iqm]sC`  
if (data[j] < data[lowIndex]) { ~v"4;A 6  
lowIndex = j; @&p:J0hbp  
} awkPFA*c'  
} :jlKj}4A  
SortUtil.swap(data,i,lowIndex); 3oc p4x`[  
} E1IT>_  
} Fcz7   
4u- mE  
} .R'<v^H  
,RjE?M%  
Shell排序: )voJq\Y)%  
!_C*2+f  
package org.rut.util.algorithm.support; RC'4%++Nz  
>W Tn4SW@  
import org.rut.util.algorithm.SortUtil; /j46`F  
]r|sU.Vl  
/** U:"X *  
* @author treeroot D])&>  
* @since 2006-2-2 f?vbIc`  
* @version 1.0 @lpo$lN0R  
*/ Htl2CcZ  
public class ShellSort implements SortUtil.Sort{ OSreS5bg  
-5vg"|ia,  
/* (non-Javadoc) AX($LIy9P  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >G7dw1;  
*/ E/[>#%@i  
public void sort(int[] data) { q@k/"ee*?  
for(int i=data.length/2;i>2;i/=2){ }z%fQbw  
for(int j=0;j insertSort(data,j,i); mq 0d ea  
} K!W7a~ @  
} q:h7Jik  
insertSort(data,0,1); \#Md3!MG  
}  2%4u/  
o;#:%  
/** lTb4quf8I  
* @param data ymH>] cUm  
* @param j ?='2@@8;  
* @param i 4z<nJOEh[  
*/ j.=&qYc0"  
private void insertSort(int[] data, int start, int inc) { 4JQd/;  
int temp; 0V;9v  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); eXKpum~  
} slUnB6@Q  
} 6z`l}<q  
} X83,f CCl5  
O2xbHn4  
} bu0i #  
3( &k4  
快速排序: Wo)$*?  
#aI(fQZe  
package org.rut.util.algorithm.support; E8X(AZ 2  
D6+^Qmu"p  
import org.rut.util.algorithm.SortUtil; 5@QJ+@j|  
F*u"LTH  
/** Fnqj^5  
* @author treeroot z)tULnR8  
* @since 2006-2-2 ;|qbz]t2(  
* @version 1.0 ~jz!jF~I  
*/ gXJtk;  
public class QuickSort implements SortUtil.Sort{ v']Tusmg  
Ei>.eXUD5  
/* (non-Javadoc) RE._Ov>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) } H#C<:A  
*/ _uXb 9  
public void sort(int[] data) { 8'WoG]E_  
quickSort(data,0,data.length-1); r+=%Ag  
} 9'5<b  
private void quickSort(int[] data,int i,int j){ Ml,~@} p  
int pivotIndex=(i+j)/2; --OAsbr  
file://swap GVT| fE  
SortUtil.swap(data,pivotIndex,j); 6JgbJbUi  
n4XEyCrD  
int k=partition(data,i-1,j,data[j]); hMCf| e.UY  
SortUtil.swap(data,k,j); #W$6[#7=I  
if((k-i)>1) quickSort(data,i,k-1); d+45Y,|  
if((j-k)>1) quickSort(data,k+1,j); `d c&B  
/,d]`N!  
} c T21  
/** z`H|]${X  
* @param data - +<ai  
* @param i h 8<s(WR  
* @param j P*|qbY  
* @return y3XR:d1cg  
*/ sA~Ijg"6  
private int partition(int[] data, int l, int r,int pivot) { D`'h8:\  
do{ w`GjQIA  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); zK_Q^M`  
SortUtil.swap(data,l,r); /+wCx#!  
} 73j\!x  
while(l SortUtil.swap(data,l,r); n  +v(t  
return l; |zbM$37 ?k  
} *j~ObE_y  
+ L [a  
} ?`= <*{_o  
~%eZQgqA*  
改进后的快速排序: c( _R xLJ  
bV$g]->4e  
package org.rut.util.algorithm.support; uK%0,!q  
\J(kevX  
import org.rut.util.algorithm.SortUtil; _TwE ym.V  
|.OS7Gt?  
/** / z m+  
* @author treeroot w-];!;%  
* @since 2006-2-2 h e=A%s  
* @version 1.0 \zh`z/=92  
*/ zYxA#TZL  
public class ImprovedQuickSort implements SortUtil.Sort { Ts\PZQ!q  
vs^)=  
private static int MAX_STACK_SIZE=4096; RD6>\9  
private static int THRESHOLD=10; /H?) qk  
/* (non-Javadoc) 4`Cgz#v {  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I!"/I8Y  
*/ !eHQe7_  
public void sort(int[] data) { i"0*)$ h W  
int[] stack=new int[MAX_STACK_SIZE]; lSfPOx;*  
9=J 3T66U  
int top=-1; rR4?*90vjj  
int pivot; /2Z7  
int pivotIndex,l,r; a|5<L  
fh*7VuAc  
stack[++top]=0; R5 i xG9  
stack[++top]=data.length-1; ~tLvD[n[  
C1#f/o->  
while(top>0){ ki'<qa  
int j=stack[top--]; = Rn  
int i=stack[top--]; RDU 'l^  
HBNX a  
pivotIndex=(i+j)/2; HXN. ,[  
pivot=data[pivotIndex]; vA{DF{S 4  
}tW1\@ =  
SortUtil.swap(data,pivotIndex,j); HHerL%/   
hWiHKR]  
file://partition e<{waJ1  
l=i-1; aA -j  
r=j; HJ!!"  
do{ 2eRv{_  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ?pdN!zOeL  
SortUtil.swap(data,l,r); }Ui)xi:8  
} \maj5VlJ  
while(l SortUtil.swap(data,l,r); x6Tpt^N}  
SortUtil.swap(data,l,j); `46|VQAx  
S\ K[l/  
if((l-i)>THRESHOLD){ z%]3`_I  
stack[++top]=i; og1Cj{0  
stack[++top]=l-1; RT2&^9-  
} - i{1h"  
if((j-l)>THRESHOLD){ 8PqlbLo1  
stack[++top]=l+1; jgqeDl\=+  
stack[++top]=j; k~2FlRoC^  
} tI  
7H4\AG\>  
} @nnX{$YX  
file://new InsertSort().sort(data); 9&HaEAme  
insertSort(data); EUq6) K  
} )afH:  
/** u= Ga}  
* @param data 5k c?:U&  
*/ p m<K6I  
private void insertSort(int[] data) { _ t.E_K  
int temp; mqBX1D`e2  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); l$!Z};mw0E  
} S^N{=*  
} ('`mPD,  
} ~(L&*/c  
=y^ g*9}_  
} s]HJcgI  
Gx|/ Jq  
归并排序: #4AqWyp#f  
UZL-mF:)&  
package org.rut.util.algorithm.support; .G}$jO}  
vos-[$  
import org.rut.util.algorithm.SortUtil; ,D.@6 bJW  
3W[Ps?G  
/** 8SBa w'a  
* @author treeroot )7m.n%B!5V  
* @since 2006-2-2 >w1jfpQ@t$  
* @version 1.0 U4lAo  
*/ <^+&A7 Q-_  
public class MergeSort implements SortUtil.Sort{ V oyRB2t  
M2A3]wd2a  
/* (non-Javadoc) Q@TeU#2Y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &!*p>Ns)e  
*/ 2{G7ignv  
public void sort(int[] data) { aw3rTT(  
int[] temp=new int[data.length]; R_IT${O  
mergeSort(data,temp,0,data.length-1); { !t6& A  
} OYOczb]  
BO 3z$c1yU  
private void mergeSort(int[] data,int[] temp,int l,int r){ (#Xgfb"S3  
int mid=(l+r)/2; TrVQ]9;jWk  
if(l==r) return ; 6f J5Y iQ  
mergeSort(data,temp,l,mid); 08$l=  
mergeSort(data,temp,mid+1,r); "-Uqv@  
for(int i=l;i<=r;i++){ @ 3b-  
temp=data; cMfnc.P\K  
} 3ZAzv en  
int i1=l; `)H| &!wT  
int i2=mid+1; o6X<FE#8  
for(int cur=l;cur<=r;cur++){ oTeQY[%$  
if(i1==mid+1) WhL"-f  
data[cur]=temp[i2++]; jYh.$g<`0+  
else if(i2>r) +H _ /  
data[cur]=temp[i1++]; .Zx7+`i  
else if(temp[i1] data[cur]=temp[i1++]; !)OA7%3m  
else i,/Q.XL  
data[cur]=temp[i2++]; %%Wn:c>  
} 1k)`C<l  
} VjSA& R  
s3)T}52  
} >kV=h?]Y  
HmpV; <t3  
改进后的归并排序: (Jy > ,~O  
*%dWNvN4X  
package org.rut.util.algorithm.support; }& 01=nY  
n(\VP!u5r  
import org.rut.util.algorithm.SortUtil; )<L?3Jjt5  
"oCXG`.k&  
/** B)ibxM(n*  
* @author treeroot %U$%x  
* @since 2006-2-2 (P nrY~9  
* @version 1.0 IUy5=Sl   
*/ h='@Q_1Sb  
public class ImprovedMergeSort implements SortUtil.Sort { iu'rc/=V  
3]/Y= A  
private static final int THRESHOLD = 10; `{\10j*B  
i'0ol^~y6  
/* j"<F?k@`Q  
* (non-Javadoc) [u8JqX  
* V[">SiOg  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LMYO>]dg  
*/ -GL-&^3IjH  
public void sort(int[] data) { f>+:UGmP  
int[] temp=new int[data.length]; n 4EZy<~m  
mergeSort(data,temp,0,data.length-1); zj'uKBDl  
} ;Z#DB$o\  
D^2yP~(  
private void mergeSort(int[] data, int[] temp, int l, int r) { +|Qe/8Q  
int i, j, k; G6j9,#2@  
int mid = (l + r) / 2; $!"*h  
if (l == r) p:qj.ukw  
return; ^ `Y1   
if ((mid - l) >= THRESHOLD) 9Dx9alJR  
mergeSort(data, temp, l, mid); q*{Dy1Tj  
else aEqDxr6  
insertSort(data, l, mid - l + 1); -cWxS{vO  
if ((r - mid) > THRESHOLD) J OH=)+xj  
mergeSort(data, temp, mid + 1, r); LwIX&\Ub  
else e@L7p,  
insertSort(data, mid + 1, r - mid); +DP{_x)t  
Z+x`q#ZQr  
for (i = l; i <= mid; i++) { .Ue1}'v*,  
temp = data; J+8T Ie  
} Gw Z(3  
for (j = 1; j <= r - mid; j++) { btU:=6  
temp[r - j + 1] = data[j + mid]; @c{b\is2  
} o*|j}hnbv  
int a = temp[l]; U*Pi%J  
int b = temp[r]; r1X\$&  
for (i = l, j = r, k = l; k <= r; k++) { }Z\PE0  
if (a < b) { =Qw`F0t  
data[k] = temp[i++]; ZIM 5$JdCv  
a = temp; ?!kPW^gD  
} else { ]+i~Cbj  
data[k] = temp[j--]; i^DZK&B@u  
b = temp[j]; {KalVZX2R  
} eI*o9k$Qs  
} W%cJ#R[o  
} g"L$}#iTsl  
k M' :.QT  
/** E:ocx2dp  
* @param data = eDi8A*~  
* @param l ]Syr{|  
* @param i AIFI@#3  
*/ /0qLMlL$  
private void insertSort(int[] data, int start, int len) { B@2VI 1%  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >~k"C,6  
} YV>]c9!q  
} V3$Yr"rZ;  
} IPT\d^|f  
} cp>1b8l6?  
/__@a&9t  
堆排序: o Kfm=TbY  
[Dq!t1  
package org.rut.util.algorithm.support; k),.  
J-g<-!>RM  
import org.rut.util.algorithm.SortUtil; myeez+@ m  
Th)Z?\8zk  
/** 7B,a xkr  
* @author treeroot &udlt//^%  
* @since 2006-2-2 * "Z5bKL  
* @version 1.0 [<M~6]  
*/ Q)s[ls  
public class HeapSort implements SortUtil.Sort{ _]whHS+  
6vQCghI  
/* (non-Javadoc) !nkjp[p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3@/\j^U  
*/ h+7THMI  
public void sort(int[] data) { kKqb:  
MaxHeap h=new MaxHeap(); zn'F9rWx>  
h.init(data); F"<TV&xf  
for(int i=0;i h.remove(); &{c.JDO  
System.arraycopy(h.queue,1,data,0,data.length); hf~'EdU  
} i#Y[I"'  
89[5a  
private static class MaxHeap{ ub/9T-#l  
= j,Hxq  
void init(int[] data){ Y[ciT)  
this.queue=new int[data.length+1]; TxD,A0  
for(int i=0;i queue[++size]=data; 54%@q[-  
fixUp(size); lU[" ZFP  
} cn$o$:tW  
} RHc-kggk!  
V94eUmx>?+  
private int size=0; ZCAdCKX|  
kgV_*0^  
private int[] queue; eJ JD'Z  
rv\m0*\<  
public int get() { N1 }#6YNw  
return queue[1]; ;5bzXW#U  
} $ &Ntdn  
fvDt_g9oI  
public void remove() { pp#xN/V#a  
SortUtil.swap(queue,1,size--); ~<?+(V^D  
fixDown(1); ,33[/j  
} n5~7x   
file://fixdown N%k6*FBp~  
private void fixDown(int k) { M(a lc9tn  
int j; 1sqBBd"=PY  
while ((j = k << 1) <= size) { j[Y$)HF  
if (j < size %26amp;%26amp; queue[j] j++; kIlc$:K^  
if (queue[k]>queue[j]) file://不用交换 1@)kNg)*$  
break; ' R!pc  
SortUtil.swap(queue,j,k); Wz~=JvRHh  
k = j; s?8vs%(l  
} .I"Qu:``  
} +EZ Lic  
private void fixUp(int k) { SCCBTpmf2B  
while (k > 1) {  a9ko3L  
int j = k >> 1; Pde|$!Jo  
if (queue[j]>queue[k]) 2L<iIBSJwm  
break; Be=J*D!E=>  
SortUtil.swap(queue,j,k); H <|ilL'fX  
k = j; kf8-#Q/B  
} GxL;@%B  
} R;wq  
*oC],4y~D  
} xV_,R'l  
f.%mp$~T  
} .>Gnb2  
%MQU&H9[  
SortUtil: &o$z[ b  
gkJL=,  
package org.rut.util.algorithm; QxSJLi7t  
h~]G6>D9)>  
import org.rut.util.algorithm.support.BubbleSort; OO Hw-MW  
import org.rut.util.algorithm.support.HeapSort; #E?TE  
import org.rut.util.algorithm.support.ImprovedMergeSort; e'FBV[e  
import org.rut.util.algorithm.support.ImprovedQuickSort; "B~c/%#PH  
import org.rut.util.algorithm.support.InsertSort; '@$YX*[  
import org.rut.util.algorithm.support.MergeSort; 0UJ% tPS  
import org.rut.util.algorithm.support.QuickSort; G,#]`W@qhK  
import org.rut.util.algorithm.support.SelectionSort; <QlpIgr  
import org.rut.util.algorithm.support.ShellSort; }9k/Y/.  
4&}V3"lg  
/** H]6i1j  
* @author treeroot 2qw-:  
* @since 2006-2-2 ''{REFjK7  
* @version 1.0 vr,8i7*0  
*/ [z2XK4\e1T  
public class SortUtil { bjQp6!TsZ  
public final static int INSERT = 1; g>m)|o'  
public final static int BUBBLE = 2; _6b?3[Xz  
public final static int SELECTION = 3; \{Q d  
public final static int SHELL = 4; Kw`{B3"  
public final static int QUICK = 5; 0W92Z@_GY  
public final static int IMPROVED_QUICK = 6; Rqi= AQ  
public final static int MERGE = 7; 1G0U}-6RH  
public final static int IMPROVED_MERGE = 8; MX@t[{Gg9  
public final static int HEAP = 9; :!SVpCt3  
Wchu-]  
public static void sort(int[] data) { toq/G,N Q  
sort(data, IMPROVED_QUICK); @H{QHi  
} NUlp4i~Q  
private static String[] name={ D5o[z:V7"  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S>-x<'Os  
}; Z*+0gJ<Y  
i `m&X6)\j  
private static Sort[] impl=new Sort[]{ ?ztI8 I/  
new InsertSort(), JHxy_<p/  
new BubbleSort(), /s@t-gTi  
new SelectionSort(), 4pvT?s>68  
new ShellSort(), w\"~ *(M  
new QuickSort(), -C]k YQ  
new ImprovedQuickSort(), #41xzN  
new MergeSort(), 9O8na 'w  
new ImprovedMergeSort(), <G9HVMiP  
new HeapSort() m* Zq3j  
}; [y(DtOR  
-8HK_eQn  
public static String toString(int algorithm){ (i1 JDe  
return name[algorithm-1]; N~""Lc&  
} p?uk|C2  
BBV"nm_(/  
public static void sort(int[] data, int algorithm) { Ic 5TtN~/>  
impl[algorithm-1].sort(data); |fL|tkGEa  
} mH1T|UI  
N\,[(LbA&  
public static interface Sort { P3 Wnso  
public void sort(int[] data); PykVXZ7j;  
} L701j.7"  
50s1o{xwc  
public static void swap(int[] data, int i, int j) { o1kTB&E4B  
int temp = data; IhIz 7.|  
data = data[j]; %DK0s(*w0  
data[j] = temp; zBQV2.@  
} wMW."gM|  
} RP@U0o  
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