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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。 (l Lu?NpIi  
插入排序: ,+~2&>wj  
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package org.rut.util.algorithm.support; N g58/}zO  
y&7YJx  
import org.rut.util.algorithm.SortUtil; |kId8WtA  
/** q#;BhPc  
* @author treeroot :FnOS<_B  
* @since 2006-2-2 LFCTr/,  
* @version 1.0 h]qT1( I  
*/ F vj{@B!  
public class InsertSort implements SortUtil.Sort{ SV&kWbS  
!d\t:0;  
/* (non-Javadoc) aw1P5aPmX  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ir]Mn.(Y  
*/ \ 0D$Mie  
public void sort(int[] data) { /^J2B8y  
int temp; /v5qyR7an  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); rxQ<4  
} ICk(z~D~  
} WS5A Y @(~  
} ?RDO] I>  
_Aa[?2 O  
} mn. `qfMh  
3a'q`.L  
冒泡排序: a~WqUL  
 for {  
package org.rut.util.algorithm.support; sN-oEqS  
5Yl6?  
import org.rut.util.algorithm.SortUtil; QW2?n`Fa9-  
|Td_S|:d  
/** dPHw3^J0j  
* @author treeroot "r@G@pe  
* @since 2006-2-2 Yr+d1(  
* @version 1.0 w}d}hI  
*/ P Q,+hq  
public class BubbleSort implements SortUtil.Sort{ 2sUbiDe-  
QeL{Wa-2F  
/* (non-Javadoc) 58J_ w X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KCD5*xH  
*/ D%A@lMru  
public void sort(int[] data) { P 4QkY#v  
int temp; lDC}HC  
for(int i=0;i for(int j=data.length-1;j>i;j--){ g&bwtEZ  
if(data[j] SortUtil.swap(data,j,j-1); >=Jsv  
} b7!UZu]IEv  
} $R";  
} 0rcjorWI  
} Q? qjWZY  
xo(k?+P>.  
} l2(.>-#  
$Buf#8)F*  
选择排序: %bXsGPB  
;|6FdU  
package org.rut.util.algorithm.support; X($6IL6m  
$~=2{  
import org.rut.util.algorithm.SortUtil; Y[ ?`\c|  
LP,9<&"<  
/** bK<}0Ja[  
* @author treeroot 66 N)  
* @since 2006-2-2 b~j~  
* @version 1.0 c#  xO<  
*/ {|XQO'Wg  
public class SelectionSort implements SortUtil.Sort { a!D*)z Y  
-1CEr_(P^  
/* { UOhVJy  
* (non-Javadoc) WO@H*  
* YN^T$,*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {S *!B  
*/ R4SxFp  
public void sort(int[] data) { _jmkl B  
int temp; /~*Cp9F"]  
for (int i = 0; i < data.length; i++) { #d% vT!Bz~  
int lowIndex = i; g ?V&mu  
for (int j = data.length - 1; j > i; j--) { n8$=f'Hgb  
if (data[j] < data[lowIndex]) { UW/N MjK  
lowIndex = j; 2m\m/O  
} F@1d%c  
} lBmm(<~Z  
SortUtil.swap(data,i,lowIndex); U. (Tl>K|0  
} ESIzGaM  
} 5U~OP  
Af9+HI O  
} "J !}3)n  
@zrNN>  
Shell排序:  ,gmH2.  
# kEOKmO  
package org.rut.util.algorithm.support; (zC   
/l6\^Xf{  
import org.rut.util.algorithm.SortUtil; H|`R4hAk  
&bLC(e ]  
/** 74_xR  
* @author treeroot GRIa8>  
* @since 2006-2-2 8R}K?+]  
* @version 1.0 @!<d0_dnC  
*/ V&[eSVY?  
public class ShellSort implements SortUtil.Sort{ f05=Mc&)  
x'qWM/  
/* (non-Javadoc) -`Q}tg>cT  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?'w sIH]m  
*/ Vho0e V=  
public void sort(int[] data) { @KA1"Wb_  
for(int i=data.length/2;i>2;i/=2){ sa9fK Z'q  
for(int j=0;j insertSort(data,j,i); O:^'x*}  
} j#VIHCzlr  
} c#QFG1  
insertSort(data,0,1); s}ADk-7  
} JKy#j g:#  
xGRT"U(  
/** $KX[Zu%  
* @param data ~@Kf2dHes  
* @param j FJT1i@N  
* @param i _]=9#Fg7{  
*/ /.P9MSz0G  
private void insertSort(int[] data, int start, int inc) { 2xn<E>]  
int temp; Pz@/|&]  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); <uD qYT$6  
} bxwkTKr'  
} .oR3Q/|k]  
} [N:BM% FQ  
6Y7H|>g)  
} <GF@L  
k|FSz#Y  
快速排序: Jq .L:>x  
j[XYj6*d  
package org.rut.util.algorithm.support; ?4G(N=/&  
JMlV@t7y<  
import org.rut.util.algorithm.SortUtil; 1,`H:%z%  
\A<v=VM|  
/** =Ndli>x}1  
* @author treeroot +O+<Go@a  
* @since 2006-2-2 XdsJwn F  
* @version 1.0 ooE{V*Ie  
*/ #s2B%X  
public class QuickSort implements SortUtil.Sort{ y94kX:q  
I4D<WoU;dJ  
/* (non-Javadoc) [se^.[0,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p<5!0 2yQ\  
*/ |s=`w8p  
public void sort(int[] data) { 8Kk\*8 <  
quickSort(data,0,data.length-1); t3b@P4c \  
} [U.v:tR   
private void quickSort(int[] data,int i,int j){ Rri`dmH   
int pivotIndex=(i+j)/2; GaBTj_3  
file://swap i8~ r  
SortUtil.swap(data,pivotIndex,j); JE!("]&  
=_PvrB2'  
int k=partition(data,i-1,j,data[j]); yC !/PQ"  
SortUtil.swap(data,k,j); -$YJfQE6G  
if((k-i)>1) quickSort(data,i,k-1); 0@pu@DP~  
if((j-k)>1) quickSort(data,k+1,j); hz\WZ^  
/\E [  
} t1ze-Ht;  
/** !M;A*:-  
* @param data 6E|S  
* @param i *)>do L  
* @param j #$'FSy#  
* @return Wx]d $_  
*/ ;6m;M63z  
private int partition(int[] data, int l, int r,int pivot) { Bo r7]#  
do{ y3IWfiz>/d  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 6y  Wc1  
SortUtil.swap(data,l,r); (oaYF+T  
} 6sB$<#  
while(l SortUtil.swap(data,l,r); aB"xqh)a}T  
return l; Rj6|Y"gq9  
} 'jvpNn  
rWQY?K@  
} 8Xn!Kpa  
l,d, T  
改进后的快速排序: 6RK\}@^=K  
5~r2sCDPk  
package org.rut.util.algorithm.support; >I<PO.c!  
KAc>-c<  
import org.rut.util.algorithm.SortUtil; T*CME]  
uZ(? >  
/** u~F~cDu  
* @author treeroot v0@)t&O  
* @since 2006-2-2 w sY}JT  
* @version 1.0 [uR/M  
*/ };S0 G!  
public class ImprovedQuickSort implements SortUtil.Sort { 4tJa-7  
5=Lq=,K$  
private static int MAX_STACK_SIZE=4096; 1 Z[f {T)  
private static int THRESHOLD=10; kMxjS^fr  
/* (non-Javadoc) Mqv[XHfB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _x %1F  
*/ <DZcra  
public void sort(int[] data) { yA;W/I4  
int[] stack=new int[MAX_STACK_SIZE]; nvyB/  
8;n_TMb  
int top=-1; 6E^~n  
int pivot; &88oB6$D^q  
int pivotIndex,l,r; ? +`x e{k  
Q"VMNvKYB  
stack[++top]=0; D7Zm2Kj  
stack[++top]=data.length-1; :"'nK6>  
DWf$X1M  
while(top>0){ h-mTj3p-K  
int j=stack[top--]; O4Dr ]Xc]  
int i=stack[top--]; S>f&6ZDNY(  
W`L!N&fB  
pivotIndex=(i+j)/2; %Q4i%:Qi  
pivot=data[pivotIndex]; ngUHkpYS5  
m{(+6-8|m  
SortUtil.swap(data,pivotIndex,j); NP_?f%(  
G]*|H0j  
file://partition 1;wb(DN*c  
l=i-1; m ,tXE%l  
r=j; 7NF/]y4w  
do{ 4JO@BV>t  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); +jV_Wz  
SortUtil.swap(data,l,r); $f-hUOuyo  
} li/aN  
while(l SortUtil.swap(data,l,r); @8gEH+r  
SortUtil.swap(data,l,j); (3%t+aqq  
MCYl{uH!  
if((l-i)>THRESHOLD){ w~+aW(2  
stack[++top]=i; ` }8&E(<  
stack[++top]=l-1; geGeZ5+B  
} flnVYQe  
if((j-l)>THRESHOLD){ 8MF2K6  
stack[++top]=l+1; 8cdsToF(e.  
stack[++top]=j; (:sZ b?*  
} ZkWL_ H)  
b^Cfhy^RTq  
} `ROG~0lN(  
file://new InsertSort().sort(data); <avQR9'&  
insertSort(data); h-XY4gq/  
} NFyMY#\]  
/** &<1 `O  
* @param data F ?=9eISLJ  
*/ BD*G1k_q  
private void insertSort(int[] data) { $>w/Cy  
int temp; )[&zCq Dc  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); RKuqx:U  
} ]gP5f@`  
} >.DC!QV  
} 2{oThef[O  
srmKaa|  
} I}.i@d'O  
ISNcswN#  
归并排序: ^v :Zo  
:.nRN`e  
package org.rut.util.algorithm.support; EzT`,#b  
C`K^L=8`{  
import org.rut.util.algorithm.SortUtil; jP=Hf=:$  
oln<yyDs   
/** 7%d8D>uw8  
* @author treeroot BIMKsF Zt  
* @since 2006-2-2 h9CIZU[Nh  
* @version 1.0 .C!vr@@]  
*/ f j<H6|3  
public class MergeSort implements SortUtil.Sort{ VmvQvQ/9R  
bToq$%sCg  
/* (non-Javadoc) 3W&S.$l  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $a#H,Xv#  
*/ APSgnf  
public void sort(int[] data) { b?VV'{4  
int[] temp=new int[data.length]; Yl({)qK{  
mergeSort(data,temp,0,data.length-1); o"+ i&Wp~  
} k1}hIAk3u  
2<r\/-#pU  
private void mergeSort(int[] data,int[] temp,int l,int r){ #R5U   
int mid=(l+r)/2; ,=PKd&  
if(l==r) return ; -5Utl os  
mergeSort(data,temp,l,mid); |b.z*G  
mergeSort(data,temp,mid+1,r); PCE4W^ns  
for(int i=l;i<=r;i++){ *e{PxaF!C  
temp=data; LU2waq}VA  
} +%#8k9Y  
int i1=l; ;Icixu'O  
int i2=mid+1; X6@wkrf-  
for(int cur=l;cur<=r;cur++){ !G?gsW0\h  
if(i1==mid+1) M+Uyb7  
data[cur]=temp[i2++]; %1}6q`:w  
else if(i2>r) K-Mc6  
data[cur]=temp[i1++]; aMwB>bt  
else if(temp[i1] data[cur]=temp[i1++]; 63&^BW  
else HlB]38  
data[cur]=temp[i2++]; P+(i^=S  
} wL{qD  
} S~yR5cb  
j8$Zv%Ca%  
} @;^Y7po6u  
8]"(!i_;)  
改进后的归并排序: r4{<Z3*N  
")UwkF  
package org.rut.util.algorithm.support; ~[W#/kd1n  
:td ~g;w  
import org.rut.util.algorithm.SortUtil; N4{nG,Mo]  
-$-8W  
/** ~~qWI>. 4  
* @author treeroot WeJ@x L  
* @since 2006-2-2 -Zc![cAlO  
* @version 1.0 \caH pof  
*/ rT6?!$"%.  
public class ImprovedMergeSort implements SortUtil.Sort { MDO$m g  
PuCc2'#  
private static final int THRESHOLD = 10; wEEn?  
WFv!Pbq,  
/* L^0v\  
* (non-Javadoc) +t!S'|C  
* ?S[Y:<R{:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QU5Sy oL[  
*/ ,/2LY4` 5  
public void sort(int[] data) { 9lzQ\}  
int[] temp=new int[data.length]; q{' ~+Nq  
mergeSort(data,temp,0,data.length-1); vmZ"o9-{#X  
} uO(w1Q"^  
&t}?2>:  
private void mergeSort(int[] data, int[] temp, int l, int r) { \~DM   
int i, j, k; p]gT&[iJ  
int mid = (l + r) / 2; :E_a 0!'  
if (l == r) F4C!CUI  
return; veh 5 }2  
if ((mid - l) >= THRESHOLD) 93Yn`Av;  
mergeSort(data, temp, l, mid); SaDA`JmO  
else 3YL l;TP_  
insertSort(data, l, mid - l + 1); *dsX#Iz  
if ((r - mid) > THRESHOLD) 1y5Ex:JVZT  
mergeSort(data, temp, mid + 1, r); ,T5u'";  
else I0 Ia6w9  
insertSort(data, mid + 1, r - mid); ?ny =  
uh3) 0.nR  
for (i = l; i <= mid; i++) { S\ ,mR4:  
temp = data; 4_=Ja2v8;`  
} nWYCh7  
for (j = 1; j <= r - mid; j++) { %JL]; 4'  
temp[r - j + 1] = data[j + mid]; KtN&,C )lJ  
} f@ `*>"  
int a = temp[l]; U~f4e7x*O  
int b = temp[r]; "VUYh$=[  
for (i = l, j = r, k = l; k <= r; k++) { [0@`wZ  
if (a < b) { @!%n$>p/V  
data[k] = temp[i++]; dF@)M  
a = temp; +}kgQ^  
} else { k2^a$k}  
data[k] = temp[j--]; #/-_1H  
b = temp[j]; &1^%Nxu1  
} b{Zpux+  
} WI[:-cv  
} FY'dJY3O  
`N8 7 h"  
/** 5 t{ja  
* @param data MZ4c{@Tg  
* @param l a:Q[gF8>  
* @param i Z|m`7xeCy  
*/ 5Jk<xWKj  
private void insertSort(int[] data, int start, int len) { p .K*UP  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CXaWgxlK:a  
} 9U_ks[Qa  
} %&blJ6b  
} I["j=r  
} Mt>oI SN&d  
dJuD|9R  
堆排序: JAb6zpP  
hf<J \   
package org.rut.util.algorithm.support; ~}9PuYaD@  
#2p#VQh  
import org.rut.util.algorithm.SortUtil; lFG9=Wf  
Y%`SHe7M  
/** tjnPyaJEl  
* @author treeroot Z*! O:/B  
* @since 2006-2-2 JgfVRqm   
* @version 1.0 &)9{HRP  
*/ Djt%r<  
public class HeapSort implements SortUtil.Sort{ 3{7T4p.G  
TpfZ>d2  
/* (non-Javadoc) 7'p8 a<x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5]Da{Wmgs  
*/ .IrNa>J~  
public void sort(int[] data) { 4vZ4/#(x  
MaxHeap h=new MaxHeap(); N3A<:%s  
h.init(data); 9(_{`2R8  
for(int i=0;i h.remove(); #;VA5<M8  
System.arraycopy(h.queue,1,data,0,data.length); /Ft:ffR|R  
} |i %2%V#  
:' #\  
private static class MaxHeap{ &Z("D7.G  
n{5NNV6  
void init(int[] data){ m?CZQq,  
this.queue=new int[data.length+1]; 4mYCSu14:`  
for(int i=0;i queue[++size]=data; ?8V UO x  
fixUp(size); s|yVAt|=  
} @tUoD>f  
} #Z,E><t  
':h =*v8a  
private int size=0; Rd&9E  
kyYLP"oB=  
private int[] queue; 8G^<[`.@j  
7{kP}?  
public int get() {  ht97s  
return queue[1]; uXZg1 F)  
} [3/VCYje  
/8ynvhF#  
public void remove() { QrYa%D+  
SortUtil.swap(queue,1,size--); ^z;JVrW  
fixDown(1); R=)55qu  
} wD \ZOn_J  
file://fixdown Kyg=$^{>G  
private void fixDown(int k) { VDF)zA1V  
int j; Bik*b)9y2  
while ((j = k << 1) <= size) { PH3 >9/H  
if (j < size %26amp;%26amp; queue[j] j++; ,?cH"@ RJ  
if (queue[k]>queue[j]) file://不用交换 Zl/< w(f_  
break; *<4Em{rZ5  
SortUtil.swap(queue,j,k); q ?j|K|%   
k = j; c@(&[/q!  
} qi[Z,&  
} .i"W8~<e  
private void fixUp(int k) { Qt>>$3]!!  
while (k > 1) { =Ufr^naA  
int j = k >> 1; Bn?V9TEoO  
if (queue[j]>queue[k]) zU5Hb2a  
break; u eb-2[=  
SortUtil.swap(queue,j,k); ;^){|9@  
k = j; _wDS#t;!M  
} 63WS7s"  
} L,[;k  
TbVn6V'  
} < Bg8,;  
;T+pu>)  
} j+4H}XyE  
*Ust[u  
SortUtil: KP"%Rm`XN  
`_X;.U.Mv  
package org.rut.util.algorithm; _`-1aA&n~  
F _3:bX  
import org.rut.util.algorithm.support.BubbleSort; ?Ke eHMu  
import org.rut.util.algorithm.support.HeapSort; wEW4gz{s  
import org.rut.util.algorithm.support.ImprovedMergeSort; csZ c|kDI  
import org.rut.util.algorithm.support.ImprovedQuickSort; Qeq5gN]  
import org.rut.util.algorithm.support.InsertSort; x*XH]&V  
import org.rut.util.algorithm.support.MergeSort; wE\3$ s/{D  
import org.rut.util.algorithm.support.QuickSort; sq/]wzT:  
import org.rut.util.algorithm.support.SelectionSort; nR;D#"p%  
import org.rut.util.algorithm.support.ShellSort; Ddju~510  
LtgXShp_!  
/** 2;3f=$3  
* @author treeroot Kn;D?ioY  
* @since 2006-2-2 &BE  g  
* @version 1.0 '])2k@o@  
*/ O\KQl0*l\\  
public class SortUtil { F/c$v  
public final static int INSERT = 1; (@0O   
public final static int BUBBLE = 2; 'T=~jA7SkT  
public final static int SELECTION = 3; E; $+f  
public final static int SHELL = 4; :aLT0q!K  
public final static int QUICK = 5; 6.1)IQkO  
public final static int IMPROVED_QUICK = 6; u"xJjS  
public final static int MERGE = 7; K0pac6]  
public final static int IMPROVED_MERGE = 8; sM[I4 .A3  
public final static int HEAP = 9; _6@hTen`  
UaG1c%7?X  
public static void sort(int[] data) { 3riw1r;Q  
sort(data, IMPROVED_QUICK); UYP9c}_,4  
} _jU5O;  
private static String[] name={ Ter :sge7  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zvc`3  
}; zSvgKmNY  
*u6Y8IL1  
private static Sort[] impl=new Sort[]{ (h-*_a}F4  
new InsertSort(), ,Tagj`@bHc  
new BubbleSort(), oB1>x^  
new SelectionSort(), gR^>3n'  
new ShellSort(), ~ (On|h  
new QuickSort(), LjFqZrH  
new ImprovedQuickSort(), t`'iU$:1f  
new MergeSort(), 4\ c,)U}  
new ImprovedMergeSort(), owpWz6k7  
new HeapSort() 3-n1 9[zk  
}; NSA F4e  
y&[y=0!  
public static String toString(int algorithm){ |!SO G  
return name[algorithm-1]; -5l6&Y   
} lfsqC};#\  
HL3XyP7  
public static void sort(int[] data, int algorithm) { /e}#' H   
impl[algorithm-1].sort(data); =QJRMF  
} DaHZ{T8>d  
Pl=]Srw  
public static interface Sort { rX7QbAB  
public void sort(int[] data); s?Uh|BfB  
} r`S< A;  
&ZHC-qMRK  
public static void swap(int[] data, int i, int j) { )}%O>%  
int temp = data; qB]i6*  
data = data[j]; /.Nov  
data[j] = temp; ,tH5e&=U01  
} /2M.~3gQ  
} rx"s!y{!-  
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