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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。 {c'2{`px 5  
插入排序: FZW)C'j  
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package org.rut.util.algorithm.support; cK;,=\  
pohA??t2:  
import org.rut.util.algorithm.SortUtil; BrdHTk= Vy  
/** Ye'=F  
* @author treeroot f__r " N  
* @since 2006-2-2 dPdodjSu,!  
* @version 1.0 #bqc}h9  
*/ l Ikh4T6i  
public class InsertSort implements SortUtil.Sort{ {xw"t9(fE  
1^*M*>&d<  
/* (non-Javadoc) z%Xz*uu(|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zHI_U\"8D  
*/ =@ '>|-w|  
public void sort(int[] data) { X*'tJN$  
int temp; `uO(#au,U  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); IA\CBwiLj  
} O>Vb7`z0<  
} \"]vSx>  
} ^^u{W|'CaH  
hPs7mnSW  
} h}X^  
U#I 8Rd I,  
冒泡排序: /B $9B  
`aj;FrF  
package org.rut.util.algorithm.support; 7X h'VOljB  
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import org.rut.util.algorithm.SortUtil; 3;wAm/Z:Q  
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/** Hh_Yd)  
* @author treeroot ^ |k 7g  
* @since 2006-2-2 wj-=#gyAoo  
* @version 1.0 }9&Z#1/  
*/ @a08*"lbp  
public class BubbleSort implements SortUtil.Sort{ 2yu\f u  
V &K:~[M  
/* (non-Javadoc) #1INOR9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5B&#Sh`r  
*/ j-e gsKR  
public void sort(int[] data) { wA+QUN3#n  
int temp; O "jX|5  
for(int i=0;i for(int j=data.length-1;j>i;j--){ U*G8 }W  
if(data[j] SortUtil.swap(data,j,j-1); BO#XQ,  
} C@{#OOa  
} wABaNB=9;  
} h L 1q9%  
} cs]N%M^s  
LL|uMe"Jb  
} DrfOz#a0Uu  
HLL[r0P`F  
选择排序: 'W!N1W@  
ea"!:cL(g  
package org.rut.util.algorithm.support; o"^+i#H!  
Pc+8CuN?  
import org.rut.util.algorithm.SortUtil; wT;3>%Mtr  
DAZzc :1Aj  
/** g_kR5Wxpt  
* @author treeroot 4fK(<2i  
* @since 2006-2-2 > 3<P^-9L  
* @version 1.0 ,/d R  
*/ CdxEY  
public class SelectionSort implements SortUtil.Sort { W'3&\}  
[I4:R_\  
/* [(Z sQK  
* (non-Javadoc) aR3R,6ec  
* f}jo18z%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'hTA O1n8  
*/ s:_M+_7_  
public void sort(int[] data) { 6`/nA4S4.  
int temp; n|t?MoUP  
for (int i = 0; i < data.length; i++) { 4NY00d/R  
int lowIndex = i; vx:MLmZ.  
for (int j = data.length - 1; j > i; j--) { @8IY J{=  
if (data[j] < data[lowIndex]) { tY?_#rc  
lowIndex = j; q|*}>=NX  
} gmU_# J%~  
} h/I'9&J>*  
SortUtil.swap(data,i,lowIndex); I! s&m%s  
} ^tWt"GgC  
} -8sm^A>C  
u/`jb2eEU:  
} yc./:t1at>  
 3kAmRU  
Shell排序: ?^F*M#%?  
K k 5 vC{  
package org.rut.util.algorithm.support; I)wjTTM5  
5|&:l8=  
import org.rut.util.algorithm.SortUtil; Jr0D:  
Oeua<,]Z~  
/** ?vHow$  
* @author treeroot 4>q^W$  
* @since 2006-2-2 PV_E3,RY  
* @version 1.0 ya!RiHj  
*/ %Pr P CT  
public class ShellSort implements SortUtil.Sort{ U}H2!et&,)  
mI55vNyer  
/* (non-Javadoc) [;bZQ6JR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TTg>g~t`  
*/ JsNqijVC  
public void sort(int[] data) { F[q:jY  
for(int i=data.length/2;i>2;i/=2){ ye-o'%{  
for(int j=0;j insertSort(data,j,i); ^P5+ _P  
} jy=dB-&  
} rgQ6/3}qc  
insertSort(data,0,1); 'b#`)w@/=  
} 6`sOhVD  
Y2&>;ym!  
/** )&G uZ  
* @param data bFivHms  
* @param j 8.Q;o+NU  
* @param i f1c Q*#2~  
*/ %s.hqr,I  
private void insertSort(int[] data, int start, int inc) { Ql1HaC/5)-  
int temp; zzf;3S?  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); k+X=8()k  
} {`Ekv/XWa  
} yY,O=yOjq  
} pdcP;.   
H*#L~!]  
} Ri$wt.b  
Qo*,2B9R L  
快速排序: BMw_F)hTO  
]+1?T)<!  
package org.rut.util.algorithm.support; 6S-1Wc4  
s?;rP,{:p  
import org.rut.util.algorithm.SortUtil; b9M.p*!  
2o0.ttBAqZ  
/** 0\ G`AO;D  
* @author treeroot V=<OV]0  
* @since 2006-2-2 Q>\y%&df  
* @version 1.0 HGuY-f  
*/ i^c  
public class QuickSort implements SortUtil.Sort{ !olvP*c"  
Yjv[rH5v  
/* (non-Javadoc) N3P!<J/tc  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [4)q6N5`f  
*/ gTz66a@i  
public void sort(int[] data) { W"9?D  
quickSort(data,0,data.length-1); !V~`e9[rl  
} IUX~dO  
private void quickSort(int[] data,int i,int j){ }}a<!L,{  
int pivotIndex=(i+j)/2; @\[UZVmBw  
file://swap "%O,*t  
SortUtil.swap(data,pivotIndex,j); _ Je k;N  
#qk}e4u  
int k=partition(data,i-1,j,data[j]); eySV -f{  
SortUtil.swap(data,k,j); DKV^c'  
if((k-i)>1) quickSort(data,i,k-1); $gi{)'z  
if((j-k)>1) quickSort(data,k+1,j); s : c  
>|<8QomD  
} s>E u[ uA  
/** M8Y\1#~  
* @param data m5HP56a  
* @param i EjsAV F [@  
* @param j jEQr{X7bEL  
* @return rbP" n)0=  
*/ IY@)  
private int partition(int[] data, int l, int r,int pivot) { N2yxli  
do{ =Qt08,.bW  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); PV?XpT  
SortUtil.swap(data,l,r); {I s?>m4  
} v:s.V>{"S  
while(l SortUtil.swap(data,l,r); !"u) `I2  
return l; Nrl&"IK|J  
} <v<TsEI  
nQ\ +Za==  
} lQs|B '  
"hRw_<  
改进后的快速排序: vkmTd4g  
@kR/=EfS  
package org.rut.util.algorithm.support; V1R=`  
. e2qa  
import org.rut.util.algorithm.SortUtil; ien >Ou  
@:$zReS2  
/** o'.6gZ gk  
* @author treeroot *&X.  
* @since 2006-2-2 S5:`fo^5  
* @version 1.0 VFN\ Ryd  
*/ 1Yt;1k'  
public class ImprovedQuickSort implements SortUtil.Sort { o[AQS`  
/p~Wk4'  
private static int MAX_STACK_SIZE=4096; ;I'pC?!y  
private static int THRESHOLD=10; jKV,i?  
/* (non-Javadoc) wyO@oi Vn  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bK `'zi  
*/ ]a|3"DP5  
public void sort(int[] data) { /ZAS%_as  
int[] stack=new int[MAX_STACK_SIZE]; -Z&6PT7  
#84pRU~  
int top=-1; t0Q/vp*/  
int pivot; ~ei\~;n\@  
int pivotIndex,l,r; x1)G!i  
O`e0r%SJ  
stack[++top]=0; oD,f5Ci-  
stack[++top]=data.length-1; A3%s5`vNvH  
=~YmM<L  
while(top>0){ 3=9yR* *  
int j=stack[top--]; aK'`yuN  
int i=stack[top--]; jyF0asb  
(;=:QjaoZ  
pivotIndex=(i+j)/2; SJ1 1LF3)  
pivot=data[pivotIndex]; i70TJk$fs  
>V:g'[b  
SortUtil.swap(data,pivotIndex,j); (80#{4kl  
gx&BzODPd0  
file://partition 620y[iiK$  
l=i-1; Qg+0(odd  
r=j; )%8oE3O#  
do{ IC}?oXs5G  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); c }>:>^  
SortUtil.swap(data,l,r); ADRjCk}I  
} nGA'\+zj L  
while(l SortUtil.swap(data,l,r); 8;7Y}c  
SortUtil.swap(data,l,j); v#0R   
}fw;{&s{z  
if((l-i)>THRESHOLD){ GW$ (E*4q  
stack[++top]=i; o uKID_ '  
stack[++top]=l-1; HxJKS*H;  
} +~J?/  
if((j-l)>THRESHOLD){ d,au&WZ;_  
stack[++top]=l+1; c_xtwdkL9  
stack[++top]=j; $NP5Z0v7  
}  D/hQ{T  
0N.tPF}  
} Xr~6_N{J  
file://new InsertSort().sort(data); ug!DL=ZW  
insertSort(data); JsOPI ]  
} }x4,a6^  
/** ,J?Hdy:R  
* @param data -}k'a{sj=  
*/ Ee>P*7*jB  
private void insertSort(int[] data) { h+|3\>/@9{  
int temp; ZjLzS]\a  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); sqHv rI  
} e47JLW&b  
} le`&VdE^  
} )F 6#n&2  
N m-{$U  
} vrXmzq  
+]Of f^s  
归并排序: pRmnS;*z&  
Lys4l$J]  
package org.rut.util.algorithm.support; ~T<#HSR`  
HGmgQ>q@M$  
import org.rut.util.algorithm.SortUtil; s)<#a(!  
1QM*oj:  
/** J=>?D@K  
* @author treeroot J=6 7As  
* @since 2006-2-2 /B"h #v-o  
* @version 1.0 [@[!esC  
*/ .EVy?-   
public class MergeSort implements SortUtil.Sort{ 7\ d{F)7E  
,-A8;DW]^J  
/* (non-Javadoc) phSF. WC  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !mK[kXo  
*/ >%+ "-bY  
public void sort(int[] data) { ]aq!@rDX  
int[] temp=new int[data.length]; |E!()j=  
mergeSort(data,temp,0,data.length-1); IXt2R~b  
} DR/qe0D  
u3kK!2cdP  
private void mergeSort(int[] data,int[] temp,int l,int r){ UC^&& 2maI  
int mid=(l+r)/2; o7VNw8Bp  
if(l==r) return ; YKLh$  
mergeSort(data,temp,l,mid); "+s#!Fh *  
mergeSort(data,temp,mid+1,r); LU4\&fd  
for(int i=l;i<=r;i++){ ,.tT9? m  
temp=data; EDvK9J  
} &$  F0  
int i1=l; qie7iE`o  
int i2=mid+1; YE&"IH]lF  
for(int cur=l;cur<=r;cur++){ 8 f%@:}H  
if(i1==mid+1) ` 1DJwe2  
data[cur]=temp[i2++]; 2;%DE<Z  
else if(i2>r) VE^NSk Oa&  
data[cur]=temp[i1++]; _:0<]<x?  
else if(temp[i1] data[cur]=temp[i1++];  }5bh,'  
else hC<X\yxe  
data[cur]=temp[i2++]; 'P}"ZHW  
} +V1EqC*  
} 8YraW|H  
m_~ p G  
} qAm$yfYs`  
l?(nkg["nY  
改进后的归并排序: W5(t+$L.  
y4) M,+O5  
package org.rut.util.algorithm.support; X`]-) (U X  
aGNVqS%y  
import org.rut.util.algorithm.SortUtil; *wP8)yv7  
oT&JQ,i[2Q  
/** Y32F { z  
* @author treeroot ]>/YU*\  
* @since 2006-2-2 !`\W8JT+  
* @version 1.0 Dqe)8 r  
*/ ?LgR8/Io@5  
public class ImprovedMergeSort implements SortUtil.Sort { l9 )iLOj  
Gk,{{:M:5  
private static final int THRESHOLD = 10; MLY19;e  
>1a- }>r  
/* Vj4 if@Z  
* (non-Javadoc) $/],QD_;"  
* !798%T  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p+;Re2Uyg  
*/ L@S"c (  
public void sort(int[] data) { +%X_+9bd  
int[] temp=new int[data.length]; 93 x.b]] "  
mergeSort(data,temp,0,data.length-1); [{N i94:d  
} qLKyr@\'  
<qZXpQ#  
private void mergeSort(int[] data, int[] temp, int l, int r) { ,oIZ5u{#,  
int i, j, k; _baqN!N  
int mid = (l + r) / 2; 'LFHZ&-  
if (l == r) %9[GP7?  
return; 0{ v?  
if ((mid - l) >= THRESHOLD) {b^naE  
mergeSort(data, temp, l, mid); [ar:zl V8  
else 4DEsB)%X  
insertSort(data, l, mid - l + 1); dJ?VN!B0  
if ((r - mid) > THRESHOLD) Y+iC/pd  
mergeSort(data, temp, mid + 1, r); G#5Cyu<r!  
else @iUzRsl  
insertSort(data, mid + 1, r - mid); /OgXNIl]  
r4JXbh6Tt  
for (i = l; i <= mid; i++) { ixBM>mRK  
temp = data; <Nv w w  
}  -6~*:zg,  
for (j = 1; j <= r - mid; j++) { _XXK1H x  
temp[r - j + 1] = data[j + mid]; dVVeH\o  
} b-]E -$Uz  
int a = temp[l]; oHI~-{m3)  
int b = temp[r]; XZcsx  
for (i = l, j = r, k = l; k <= r; k++) { u A C:&  
if (a < b) { #1hT#YN  
data[k] = temp[i++]; , 9|%  
a = temp; :m5& i&  
} else { )oTEB#J  
data[k] = temp[j--]; Qat%<;P2  
b = temp[j]; FvG9PPd  
} }yx{13:[  
} z:u`W#Rf  
} <Ml,H%F  
T_Z@uZom.  
/** _I~TpH^1K  
* @param data ;07!^#:L=Q  
* @param l L)8+/+  
* @param i a[";K,  
*/ huvg'Y t  
private void insertSort(int[] data, int start, int len) { -/x +M-X#  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H4l:L(!D  
} H!F'I)1  
} )FWF T:P~  
} dadOjl)S)  
} aU^>kRGc  
/T#<g:   
堆排序: [w=x0J&  
bQXxb(^  
package org.rut.util.algorithm.support; 6 $ IXER  
C$*`c6R  
import org.rut.util.algorithm.SortUtil; [7<X&Q  
zmr=iK  
/** ^+`vh0TPQ  
* @author treeroot t)cG_+rJ  
* @since 2006-2-2 ,Lv} Xku  
* @version 1.0 c::x.B"w  
*/ Lom%eoH)  
public class HeapSort implements SortUtil.Sort{ 32~Tf,  
e"r}I!.  
/* (non-Javadoc) eoEb\zJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ujz %0Mq;  
*/ !Q.c8GRUQ  
public void sort(int[] data) { V.y+u7<3}  
MaxHeap h=new MaxHeap(); ^{6Y7T]  
h.init(data); FT|*~_@  
for(int i=0;i h.remove(); iM8hGQ`  
System.arraycopy(h.queue,1,data,0,data.length); zNE!m:s  
} /4_}wi\  
*N>Qj-KAM_  
private static class MaxHeap{ =7e8N&-nv  
^]U2Jd  
void init(int[] data){ !-N!8 0  
this.queue=new int[data.length+1]; "3\RJ?eW:S  
for(int i=0;i queue[++size]=data; 30DpIkf  
fixUp(size); P? 9CBhN  
} EHzZ9zH\  
} '/sc `(`:0  
P*aD2("Z  
private int size=0; EAY9~b6~c  
jb7=1OPD_  
private int[] queue; YvYavd  
//J:p,AF  
public int get() { ]G1j\wnF  
return queue[1]; ` 4k;`a  
} s{s0#g  
U">OdoZ,E+  
public void remove() { dtF6IdAf  
SortUtil.swap(queue,1,size--); +ixDB0"\  
fixDown(1); dH`a|SVW9  
} >,] #~d  
file://fixdown dtg Ja_  
private void fixDown(int k) { PU'v o4  
int j; OW-+23)sj  
while ((j = k << 1) <= size) { F)gL=6h  
if (j < size %26amp;%26amp; queue[j] j++; Qb(CH  
if (queue[k]>queue[j]) file://不用交换 Rw/G =zV@2  
break; Y\op9 Fw  
SortUtil.swap(queue,j,k); E_H1X'|qS4  
k = j; qL'3MY.!  
} W2<X 5'  
} ?-i|f_`  
private void fixUp(int k) { c<H4rB  
while (k > 1) { 3zl!x  
int j = k >> 1; _p_F v>>:  
if (queue[j]>queue[k]) 3/[=  
break; #e|eWi>  
SortUtil.swap(queue,j,k); iEU(1?m2-  
k = j; Etl7V  
} >^Y 9p~  
} PN'8"8`{  
JQtH },T r  
} <!+o8z]  
,88Y1|:X  
} -"cN9RF  
xS(sRx+A  
SortUtil: TWs|lhC7!  
yq<YGNy!  
package org.rut.util.algorithm; QqwX Fk  
!3b%Q</M H  
import org.rut.util.algorithm.support.BubbleSort; Wt`D  
import org.rut.util.algorithm.support.HeapSort; 3% P?1s  
import org.rut.util.algorithm.support.ImprovedMergeSort; ScTqnY$v  
import org.rut.util.algorithm.support.ImprovedQuickSort; 'sA&Pm  
import org.rut.util.algorithm.support.InsertSort; djSN{>S  
import org.rut.util.algorithm.support.MergeSort; Olno9_'  
import org.rut.util.algorithm.support.QuickSort; "~[Rwh?  
import org.rut.util.algorithm.support.SelectionSort; - a=yi d  
import org.rut.util.algorithm.support.ShellSort; t]` 2f3UO  
q@\_q!  
/** sbs"26IE  
* @author treeroot xv*mK1e  
* @since 2006-2-2 gRFC n6Q  
* @version 1.0 ex| kD*=  
*/ gSGe]  
public class SortUtil { T+[e6/|  
public final static int INSERT = 1; =CVw0'yZ  
public final static int BUBBLE = 2; eyE&<:F#J  
public final static int SELECTION = 3; uVk8KMYU  
public final static int SHELL = 4; \ bhok   
public final static int QUICK = 5; QB.7n&u  
public final static int IMPROVED_QUICK = 6; ~FsUK;?  
public final static int MERGE = 7; kN^)6  
public final static int IMPROVED_MERGE = 8; B.WJ6.DkS  
public final static int HEAP = 9; y H'\<bT  
ry T8*}o  
public static void sort(int[] data) { n (|>7  
sort(data, IMPROVED_QUICK); q-RGplx  
} x'KsQlI/  
private static String[] name={ OP&[5X+Y  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D!P?sq_5r  
}; XMdc n,  
wiGwN  
private static Sort[] impl=new Sort[]{ MvW>ktkU  
new InsertSort(), 5^Y/RS i  
new BubbleSort(), j~8+,:  
new SelectionSort(), Qnw$=L:  
new ShellSort(), ~3%3{a a  
new QuickSort(), U\ L"\N7  
new ImprovedQuickSort(), HUghl2L.<  
new MergeSort(), l<HRD  
new ImprovedMergeSort(), %b?Pasf.  
new HeapSort() &-* nr/xT  
}; Z`*cI   
$"i690  
public static String toString(int algorithm){ vq s~a7E-P  
return name[algorithm-1]; ,,J3 h  
} C1/jA>XW  
O<3,n;56Z  
public static void sort(int[] data, int algorithm) { wY95|QS  
impl[algorithm-1].sort(data); d"78:+  
} 47RYpd  
q>[% C5  
public static interface Sort { :9#`| #uh  
public void sort(int[] data); {eXYl[7n  
} J v#^GNm  
Lm?*p>\Q  
public static void swap(int[] data, int i, int j) { G4}q*&:k  
int temp = data; Q*8-d9C  
data = data[j]; hG@ys5  
data[j] = temp; `[KhG)Y7t  
} TH|hrL;:8  
} QdTe!f|  
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