[JAVA]用Java实现的各种排序

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。 bl8y o4  
插入排序： Hy2~D:34  
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package org.rut.util.algorithm.support; UmP\;
 
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import org.rut.util.algorithm.SortUtil; K^[Dz\ov5  
/** j'LO'&sQ(  
* @author treeroot @=6$ImU  
* @since 2006-2-2 _^NL{R/  
* @version 1.0 `6Yk-5  
*/ 6$5SS#  
public class InsertSort implements SortUtil.Sort{ 03I*@jj  
IoxdWQ4]A  
/* (non-Javadoc) iRI7x)^0"z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0PJ7o#}_{@  
*/ {xQ(xy  
public void sort(int[] data) { "tU,.U
 
int temp; *qw//W  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); bP1]:^ x@W  
} ?_@Mg\Hc
 
} QjFE  
} .10$n*  
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} $+w-r#,  
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冒泡排序： I~>Ye<g#  
IUwMIHq&sW  
package org.rut.util.algorithm.support; h~.z[  
T@on ue7  
import org.rut.util.algorithm.SortUtil; MOu=  
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/** { VFr8F0*H  
* @author treeroot |BE`ASW;  
* @since 2006-2-2 .Za)S5U  
* @version 1.0 LX;" Mz>  
*/ =U3rOYbP;  
public class BubbleSort implements SortUtil.Sort{ , n
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/* (non-Javadoc) W
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9>[*y8[:0  
*/ cp3O$S  
public void sort(int[] data) { %gV~e@|  
int temp; oGqbk x  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ~|=goHmm[  
if(data[j] SortUtil.swap(data,j,j-1); eGlPi|  
} ~cW,B}  
} )\fLS d  
} F@kd[>/[  
} = GZ,P (
  
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} OVU+V 0w1a  
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选择排序： 9\a;75a  
"tg?V  
package org.rut.util.algorithm.support; pcO0xrI  
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import org.rut.util.algorithm.SortUtil;  ^#&:-4/  
ffoLCx4o0E  
/** vjO@"2YEw  
* @author treeroot 6@geakq  
* @since 2006-2-2 \[W)[mH_  
* @version 1.0 /nVGr]t_pj  
*/ S3.76&  
public class SelectionSort implements SortUtil.Sort { si`h(VD9w  
;n;bap  
/* Eh/Z4pzT  
* (non-Javadoc) eaCh;IpIf  
* !5=S2<UX  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }J|Pd3Q Sf  
*/ pn-`QB:{h  
public void sort(int[] data) { 8;1,saA_9  
int temp; !t!\b9=  
for (int i = 0; i < data.length; i++) { b[`
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int lowIndex = i; 2mfKy9QxO  
for (int j = data.length - 1; j > i; j--) { fFJu]  
if (data[j] < data[lowIndex]) { 7':qx}c#!1  
lowIndex = j; hYEUiQ  
} wJu,N(U  
} KkD&|&!Q7u  
SortUtil.swap(data,i,lowIndex); 9a3mN(<  
} oeIza<:=R  
} GR>kxYM%q  
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} >Eqr/~Q  
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Shell排序： A4hbh$  
O[<0\  
package org.rut.util.algorithm.support; /YT _~q=:  
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import org.rut.util.algorithm.SortUtil; X>4qL'b:z  
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/** :~%{  
* @author treeroot m9 D'yXZ  
* @since 2006-2-2 o2e gNTG  
* @version 1.0 b_rHt s  
*/ (hFyp}jkk  
public class ShellSort implements SortUtil.Sort{ VFLW@  
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/* (non-Javadoc) )H|cri~D  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =&"x6F.`  
*/ 8m"jd+  
public void sort(int[] data) { '4]_~?&x  
for(int i=data.length/2;i>2;i/=2){ =dDr:Y<@*  
for(int j=0;j insertSort(data,j,i); LMTz/M  
} uwo\FI  
} EaU
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insertSort(data,0,1); #d;/Me  
} 4"~l^yK  
Z|6,*XEc   
/** =Cg1I\  
* @param data L wP  
* @param j ['jr+gIfQ  
* @param i -0f,qNF  
*/ lNba[
;_  
private void insertSort(int[] data, int start, int inc) { ?{rpzrc!*  
int temp; `Tk GI0q  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); `|WEz
W~  
} bd)'1;p  
} i$JN s)I%  
} X(JE]6_  
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} N97
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"xV0$%  
快速排序： Y4Y~ep  
Nn='9s9F?}  
package org.rut.util.algorithm.support; S?<hs,  
fOJTy0jX8  
import org.rut.util.algorithm.SortUtil; ^\C Fke=  
nN5fP<H2x  
/** _:7:ixN[Ie  
* @author treeroot ><i: P*ht  
* @since 2006-2-2 l?)!^}Qc  
* @version 1.0 L25%KGg'o  
*/ Q:U>nm>xA  
public class QuickSort implements SortUtil.Sort{ 7(l>Ck3B#  
Nk;ywC"e;  
/* (non-Javadoc) hMnm>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \-8S"  
*/ 5jAS1XG  
public void sort(int[] data) { ]\m>N]P]  
quickSort(data,0,data.length-1); \wF-[']N  
}  L30$  
private void quickSort(int[] data,int i,int j){ $8WWN} OC  
int pivotIndex=(i+j)/2; \>[k0<  
file://swap b} FhC"'i  
SortUtil.swap(data,pivotIndex,j); %ty`Oa2  
7KL@[  
int k=partition(data,i-1,j,data[j]); WS//0  
SortUtil.swap(data,k,j); 6uIgyO*;k  
if((k-i)>1) quickSort(data,i,k-1); +t%1FkI\  
if((j-k)>1) quickSort(data,k+1,j); E
hAaaG  
{"c`k4R  
} 6/6{69tnr  
/** otbr8&?-  
* @param data nzU;Bi^m  
* @param i xauMF~*  
* @param j =SD^Jl{H  
* @return ;zT3Fv\  
*/ H3LuRGe&2  
private int partition(int[] data, int l, int r,int pivot) { b|e1HCH  
do{ 9,[Af
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while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); |y pXO3  
SortUtil.swap(data,l,r); <$??Z;6  
} 7n,=`0{r  
while(l SortUtil.swap(data,l,r); Y_)xytJ$  
return l; +U)4V}S)  
} M+*K-zt0  
W*B=j[w  
} 8SA" bH:  
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改进后的快速排序： n8tw8o%&[  
+Fb+dU  
package org.rut.util.algorithm.support; =Cd{bj.8  
S)?N6sz%  
import org.rut.util.algorithm.SortUtil; (hEg
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/** ZUkM8M
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* @author treeroot C\4d.~C:w3  
* @since 2006-2-2 QBh*x/J  
* @version 1.0 n?U^vK_  
*/ Z~F*$jn  
public class ImprovedQuickSort implements SortUtil.Sort { (D:-p:q.  
pHXs+Ysw+  
private static int MAX_STACK_SIZE=4096; v*OV\h.  
private static int THRESHOLD=10; T%Bz>K  
/* (non-Javadoc) _PcF/Gyk  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [(eX\kL  
*/ (%OZ `?`  
public void sort(int[] data) { zf&:@P{  
int[] stack=new int[MAX_STACK_SIZE]; $6(a6!  
E]v?:!!ds  
int top=-1; mx#%oJnsi  
int pivot; S*gm[ZLQ  
int pivotIndex,l,r; #^BttI  
icb*L~qm  
stack[++top]=0; !9.FI{W  
stack[++top]=data.length-1; KY}H-  
{,u})U2  
while(top>0){
*nYg-)  
int j=stack[top--]; "7'P Lo3O  
int i=stack[top--]; :dpwr9)  
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pivotIndex=(i+j)/2; $s4.A
j  
pivot=data[pivotIndex]; 8t. QFze?  
lXZ*Pb<j  
SortUtil.swap(data,pivotIndex,j); /!MVpi'6&  
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file://partition Q6wa-Y,  
l=i-1; 8d2\H*a9~  
r=j; S~hu(x#  
do{ 6ypLE@Mk  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); .rITzwgB  
SortUtil.swap(data,l,r); 1=7ASS9  
} UhrRB  
while(l SortUtil.swap(data,l,r); m"'}{3$%  
SortUtil.swap(data,l,j); \A,zwdt P  
8\^A;5  
if((l-i)>THRESHOLD){ W+/_0GgQ3  
stack[++top]=i; rwVp}H G  
stack[++top]=l-1; m[KmXPFht1  
} nmts% u  
if((j-l)>THRESHOLD){ g8l6bh$}  
stack[++top]=l+1; ma+AFCi  
stack[++top]=j; Sb> &m  
} pB
#I_?(  
+wJ!zab`  
} awwSgy  
file://new InsertSort().sort(data); 0Sz[u\w  
insertSort(data); s5rD+g]E`  
} @"MQ6u G>  
/** [8^q3o7n  
* @param data hl7 z1h  
*/ M2N8?Ycv3  
private void insertSort(int[] data) { f*B
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int temp; A=5Ebu!z  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ;Xy=;Z.]
i  
} }{VOyPG  
} \ ZE[7Ae  
} 6o7t eX  
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} YcX\t6VK  
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归并排序： !{(Bc8 hT  
CUYA:R<)  
package org.rut.util.algorithm.support; 3V?x&qlP>  
aY#?QjL  
import org.rut.util.algorithm.SortUtil; [5& nH@og  
#MlpOk*G  
/** Y}v3
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* @author treeroot U31@++C[  
* @since 2006-2-2 <K`E*IaW  
* @version 1.0 I](a 5i  
*/ p/?o^_s  
public class MergeSort implements SortUtil.Sort{ r+8D|stS  
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/* (non-Javadoc) %ACW"2#(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U
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*/ Tk4>Jb  
public void sort(int[] data) {
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int[] temp=new int[data.length]; j}eb _K+I  
mergeSort(data,temp,0,data.length-1); DkEv1]6JI_  
} T1$E][@Iv  
P+}~6}wJE  
private void mergeSort(int[] data,int[] temp,int l,int r){ 8zD>t~N2C  
int mid=(l+r)/2; 7!pKlmQ  
if(l==r) return ; z'_Fg0kR{  
mergeSort(data,temp,l,mid); :86:U 0^  
mergeSort(data,temp,mid+1,r); ^ls@Gr7`P  
for(int i=l;i<=r;i++){ 3@Mh* \;\b  
temp=data; Qk:Lo*!  
} Td|u@l4B  
int i1=l; PY.K_(D  
int i2=mid+1; ?gl&q+mv  
for(int cur=l;cur<=r;cur++){ Mh
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if(i1==mid+1) oT):#,s  
data[cur]=temp[i2++]; w3(|A> s3  
else if(i2>r) %7 bd}sJ#  
data[cur]=temp[i1++]; J8alqs7  
else if(temp[i1] data[cur]=temp[i1++]; 4SJ aAeIZ  
else \D?'.Wo%  
data[cur]=temp[i2++]; B2ln8NF#Q  
} u^tQ2&?O!P  
} Ig`q[o  
-[L\:'Gp5  
} tF`L]1r>  
F,wB6Cw  
改进后的归并排序: 'F/oR/4,  
h#
hr'3bI1  
package org.rut.util.algorithm.support; B>^6tdz  
{r&mNbz  
import org.rut.util.algorithm.SortUtil; 6:#o0OeBP  
K=[7<b,:3  
/** 0Idek  
* @author treeroot K {' atc  
* @since 2006-2-2 Fvl\.  
* @version 1.0 xz8e1M  
*/ rUb{iU;~m  
public class ImprovedMergeSort implements SortUtil.Sort { f=F:Af!  
Svn7.Ivep  
private static final int THRESHOLD = 10; Xxg|01  
V/ G1C^'/  
/* 73cb1kfPd  
* (non-Javadoc) Trv}YT.  
* :W*yfhLt  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <T}U 3lL^  
*/ L7
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public void sort(int[] data) { s|Mo3_>  
int[] temp=new int[data.length]; ~v;I>ij  
mergeSort(data,temp,0,data.length-1); nHdQe  
} X
Hk
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Z@0tZ^V{  
private void mergeSort(int[] data, int[] temp, int l, int r) { ?.46X^  
int i, j, k; .dlsiBh  
int mid = (l + r) / 2; 7 m{lOR  
if (l == r) m^3x%
ENZ  
return; 5^g*  
if ((mid - l) >= THRESHOLD) I`V<Sh^Qd  
mergeSort(data, temp, l, mid); MYS`@%ZV#k  
else }HoCfiE=X  
insertSort(data, l, mid - l + 1); wXQxZuk[  
if ((r - mid) > THRESHOLD) >3uNh:|>/  
mergeSort(data, temp, mid + 1, r); ,eyh%k*hz  
else 8_('[89m  
insertSort(data, mid + 1, r - mid); u9hd%}9Qd?  
zEI+)|4?r  
for (i = l; i <= mid; i++) { 9&Jf4lC94  
temp = data; `}Zqmfs  
} 5qz,FKx5  
for (j = 1; j <= r - mid; j++) { -#|;qFD]  
temp[r - j + 1] = data[j + mid]; l)%PvLbL  
} =0Z
RGp  
int a = temp[l]; Z
}+}X|  
int b = temp[r]; GTdoUSUq  
for (i = l, j = r, k = l; k <= r; k++) { PILpWhjL$9  
if (a < b) { d0:LJ'<Q  
data[k] = temp[i++]; 5kiW@{m  
a = temp; #r'MfTr  
} else { PK[mf\G\  
data[k] = temp[j--]; &: Q'X  
b = temp[j]; U,=f};  
} Ehx9-*]
 
} s;VW %e  
} 8o~ NJ 6  
T*x2+(r  
/** O4R\]B#Xu  
* @param data /hl'T'RG  
* @param l wMW<lT=;  
* @param i 0g?)j-  
*/ :$k*y%Z*N&  
private void insertSort(int[] data, int start, int len) { hne@I1  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cb}zCl j o  
} *[[Gu^t^!  
} d0(zB5'}  
} E4X6f  
} LikcW#  
Scrj%h%[  
堆排序： 'ITq\1z  
2%%\jlT_  
package org.rut.util.algorithm.support; A=<7*E  
>d +
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import org.rut.util.algorithm.SortUtil; hXTfmFy{n  
hF2e--  
/** [}L~zn6>?a  
* @author treeroot HRf;bKZ  
* @since 2006-2-2 FNQ<k[#K'~  
* @version 1.0 ,2FK$:M\  
*/ b80#75Bj>  
public class HeapSort implements SortUtil.Sort{ Y(PCc}/\  
| b'Ut)E  
/* (non-Javadoc) E%mEfj7  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :G _  
*/ q'mh*  
public void sort(int[] data) { e*:K79y  
MaxHeap h=new MaxHeap(); qf? "v;  
h.init(data); RAW;ze*"  
for(int i=0;i h.remove(); *[si!e%  
System.arraycopy(h.queue,1,data,0,data.length); {7M++J=  
} Q %o@s3~O  
tsb[=W!Ar8  
private static class MaxHeap{ 2*Qv6 :qK  
#mQ@4k9i  
void init(int[] data){ 
$+4DpqJ  
this.queue=new int[data.length+1]; N~)-\T:ap  
for(int i=0;i queue[++size]=data; `zQuhD 8W  
fixUp(size); Y1PR?c Q  
} bzi"7%c  
} "Rj PTRe:  
s=8H<'l  
private int size=0; v) n-  
2zC4nF)>O  
private int[] queue; /QXUD.( 8  
9?l a5  
public int get() { V*?c
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return queue[1]; S=qh7ML  
} m+c-"arIpA  
uxfh?gsL  
public void remove() { DDrR9}k  
SortUtil.swap(queue,1,size--); iH(7.?.r  
fixDown(1); B;9,Qbb  
} !l[;,l  
file://fixdown F[ E'R.:  
private void fixDown(int k) { '@{:FrG*U  
int j; io#}z4"'qY  
while ((j = k << 1) <= size) { @)Vpj\jM-C  
if (j < size %26amp;%26amp; queue[j] j++; i2<z"v63  
if (queue[k]>queue[j]) file://不用交换 qDdO-fPev  
break; R$&;  
SortUtil.swap(queue,j,k); 5H3o?x
 
k = j; X$kLBG_  
} <F9-$_m  
} qTuR[(  
private void fixUp(int k) { i~u4v3r=  
while (k > 1) { rL5=8l  
int j = k >> 1; {
hS!IOM  
if (queue[j]>queue[k]) Z '5itN^  
break; LK'(OZ  
SortUtil.swap(queue,j,k); Z ]A |"6<  
k = j; 3BMz{ny=  
} i%i~qTN  
} lNe4e6  
:C5w5 Vnj  
} pBqf+}g4  
s$fM,l:!  
} 1Yb&E7j  
NpVL;6?7T  
SortUtil： ZKi&f,:  
'w:ugb9]  
package org.rut.util.algorithm; lelmX  
T}Tv}~!f  
import org.rut.util.algorithm.support.BubbleSort; ucl001EK  
import org.rut.util.algorithm.support.HeapSort; :w8{BIUN)  
import org.rut.util.algorithm.support.ImprovedMergeSort; S m(*<H  
import org.rut.util.algorithm.support.ImprovedQuickSort; m H:Un{,  
import org.rut.util.algorithm.support.InsertSort; k0Vri$x  
import org.rut.util.algorithm.support.MergeSort; J jAxNviG  
import org.rut.util.algorithm.support.QuickSort; WuK<?1meN  
import org.rut.util.algorithm.support.SelectionSort; V!:!c]8F  
import org.rut.util.algorithm.support.ShellSort; e:G~P u`  
>.wZEQ6QK  
/** 3Zp<#  
* @author treeroot <#0i*PM_  
* @since 2006-2-2 Q
a2h#0j  
* @version 1.0 }IygU 6{G  
*/ Dw i-iA_q  
public class SortUtil { 'aNkU  
public final static int INSERT = 1; Pt"K+]Ym  
public final static int BUBBLE = 2; *f+s  
public final static int SELECTION = 3; uEgR>X>  
public final static int SHELL = 4; o)I)I/v  
public final static int QUICK = 5; YJ~<pH  
public final static int IMPROVED_QUICK = 6; H;`F}qQ3  
public final static int MERGE = 7; l,|Llb  
public final static int IMPROVED_MERGE = 8; "~Fg-{jM%  
public final static int HEAP = 9; INndTF  
#Y= A#Yz,{  
public static void sort(int[] data) {  S.MRL,  
sort(data, IMPROVED_QUICK); j~'.XD={  
} Hzz{wY   
private static String[] name={ "ku[b\W  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H&s`Xr  
}; 9~V'Wev  
uzp\V 39  
private static Sort[] impl=new Sort[]{ XL*M#Jx  
new InsertSort(), NDRDPD  
new BubbleSort(), {t;o^pUF  
new SelectionSort(),  %lj5Olj  
new ShellSort(), hNc8uV{r=  
new QuickSort(), !oyo_h  
new ImprovedQuickSort(), -'c qepC{T  
new MergeSort(), Yo%U{/e  
new ImprovedMergeSort(), 4QQt 0u0  
new HeapSort() vU%o5y:  
}; bqn(5)%{  
:^(y~q?  
public static String toString(int algorithm){ bZ
`#;D<  
return name[algorithm-1]; i&DbZ=n2  
} 72$S'O%,0  
8cO?VH,nk  
public static void sort(int[] data, int algorithm) { YI0l&'7  
impl[algorithm-1].sort(data); IYn`&jS{  
} C-edQWbcP  
N+.Nu= +i2  
public static interface Sort { mX|M]^_,z  
public void sort(int[] data); q&=z^Ln!G  
} ?EUg B\  
kO)Y|zQ  
public static void swap(int[] data, int i, int j) { 7fqQ  
int temp = data; .7.1JT#@A7  
data = data[j]; B-g uz  
data[j] = temp; u""26k51  
} JOuy_n  
} R.i]6H!