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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。 k'E3{8<!  
插入排序: %yX?4T;b  
%^ f! = *  
package org.rut.util.algorithm.support; A!\ouKyayS  
Ppi/`X  
import org.rut.util.algorithm.SortUtil; 1Y4=D  
/** qPGpN0M`  
* @author treeroot  P&"8R  
* @since 2006-2-2 hJ$o+sl  
* @version 1.0 !|;^  
*/ M3ihtY  
public class InsertSort implements SortUtil.Sort{ 'g.9 goQ  
YyEW}2  
/* (non-Javadoc) 8+K=3=05#U  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v7&oHOk!  
*/ ["Mq  
public void sort(int[] data) { B,@geJ  
int temp; Dn~r~aR$g  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 1$T;u~vg  
} k=1([x  
}  al/Mgo  
} @q:v?AO  
?=,4{(/)  
} .'N:]G@!  
([SrIG>X  
冒泡排序: \^a(B{   
t&}Z~Zp  
package org.rut.util.algorithm.support; gsFyZ  
Tlc3l}B*Z  
import org.rut.util.algorithm.SortUtil; CZ* #FY  
Agt6G\ n  
/** &J(+XJM%  
* @author treeroot 6/_] |4t  
* @since 2006-2-2 IX@g].)C  
* @version 1.0 "~-H]9  
*/ QP/%+[E.  
public class BubbleSort implements SortUtil.Sort{ jej|B#?`  
`2N&{(  
/* (non-Javadoc) @a-u_|3q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C_xO k'091  
*/ WeyH;P=  
public void sort(int[] data) { ; ^+#  
int temp; 8>^(-ca_  
for(int i=0;i for(int j=data.length-1;j>i;j--){ C><]o  
if(data[j] SortUtil.swap(data,j,j-1);  .>?h  
} aDEz |>q  
} >SRUC  
} Tk~RT<\Ab+  
} >Y,3EI\  
,Vb;2  
} GZJIIP#  
l{q$[/J~)  
选择排序: Z9P rw/8P  
s+#|j;V<  
package org.rut.util.algorithm.support; .G-F5`2I  
PL vz1}ts  
import org.rut.util.algorithm.SortUtil; FyD^\6/x  
6G2s^P1Dl@  
/** Ip c2Qsa  
* @author treeroot S%+,:kq  
* @since 2006-2-2 YdsY2  
* @version 1.0 LF o{,%B  
*/ 'lmZ{a6  
public class SelectionSort implements SortUtil.Sort { { a2Y7\C/  
4cZig\mE;  
/* w1Ar[ P  
* (non-Javadoc) },1**_#<Br  
* vn oI.;H,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dLA'cQId  
*/ Qa*?iD  
public void sort(int[] data) { _D{zB1d\0  
int temp; r=57,P(:Ca  
for (int i = 0; i < data.length; i++) { jvfVB'Tmr  
int lowIndex = i; ?}f+PP,  
for (int j = data.length - 1; j > i; j--) { F.;G6  
if (data[j] < data[lowIndex]) { O5}/OH|j  
lowIndex = j; yWS #{| o(  
} iMgfF_r  
} r(UEPGu|~l  
SortUtil.swap(data,i,lowIndex);  3Ee8_(E\  
} 6AS'MD%&  
} ?l\1n,!:8  
9iMQq40  
} ?Q$LIoR  
gkxEy5c[  
Shell排序: D@]gc&JN[  
VyRU_<xP  
package org.rut.util.algorithm.support; ZHPsGHA  
TTNgnP  
import org.rut.util.algorithm.SortUtil; -KzU''  
/cmnX'z  
/**  $^&SEz  
* @author treeroot %y@iA91K  
* @since 2006-2-2 @\~qXz{6J  
* @version 1.0 !A R$JUnX  
*/ 6Mpbmfr  
public class ShellSort implements SortUtil.Sort{ r 5$(  
*~p~IX{  
/* (non-Javadoc) [w iI  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #3uBq(-Z  
*/ >z=_V|^$  
public void sort(int[] data) { o;#{N~4[$  
for(int i=data.length/2;i>2;i/=2){ s3G\L<~mB  
for(int j=0;j insertSort(data,j,i); = mn jIp  
} m~K[+P  
} HSt|Ua.c/h  
insertSort(data,0,1); |=OO$z;q|  
} R=D\VIu,Z  
mtfyhFk  
/** to0tH^pD  
* @param data %9_wDfw~  
* @param j 0 O{Y Vk`  
* @param i !;Mh5*-  
*/ ETu7G5?  
private void insertSort(int[] data, int start, int inc) { !U02>X   
int temp;  KR  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Kd_WN;l  
} )G(6=l*  
} ^V^In-[!y:  
} #=WDJ T:  
pv;c<NQ'1  
} gto@o\&=  
dEXHd@"H  
快速排序: niO(>  
T;-Zl[H  
package org.rut.util.algorithm.support; "Y&+J@]  
vP G!S{4  
import org.rut.util.algorithm.SortUtil; b0a'Y"oef4  
>K`.!!av,Y  
/** '-jKv=D+  
* @author treeroot D\Y)E#%,  
* @since 2006-2-2 !$q1m@K1  
* @version 1.0 ?Y"bt^4j  
*/ d}f| HOFq  
public class QuickSort implements SortUtil.Sort{ ~A8%[.({5  
`Tzq vnn  
/* (non-Javadoc) 5H6GZ:hp  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l3aG#4jj  
*/ -;$+`<%  
public void sort(int[] data) { UQ|zSalv,  
quickSort(data,0,data.length-1); ,2>:h"^  
} b("JgE`  
private void quickSort(int[] data,int i,int j){ YY I  
int pivotIndex=(i+j)/2; -X@;"0v  
file://swap oeXNb4; 4  
SortUtil.swap(data,pivotIndex,j); >J=x";,D|~  
m[^;HwJ  
int k=partition(data,i-1,j,data[j]); T0_9:I`&  
SortUtil.swap(data,k,j); wAHb 5>!  
if((k-i)>1) quickSort(data,i,k-1); @C=, >+D  
if((j-k)>1) quickSort(data,k+1,j); h3;Ij'  
M3Kpp _d_!  
} ErC~,5dj;n  
/** Q}jbk9gM5  
* @param data $8&HpX#h$  
* @param i ,8uu,,c  
* @param j y? [*qnPj  
* @return T[)) ful  
*/ 0:G@a&Lr  
private int partition(int[] data, int l, int r,int pivot) { QnxkD)f*0  
do{ gb:Cc,F,%  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Fga9  
SortUtil.swap(data,l,r); @{_PO{=\C  
} o,) p*glO  
while(l SortUtil.swap(data,l,r); cFLu+4.jsG  
return l; Cu({%Gy+  
} +ZXGT  
hBsjO3n  
} whNRUOK:  
ZP)=2'RY  
改进后的快速排序: Y,D\_il_  
,Ucb)8a  
package org.rut.util.algorithm.support; )ymF: ]QC  
\Y9=d E}  
import org.rut.util.algorithm.SortUtil; c7\bA7.  
!U`T;\,v5  
/** p)ZlQ.d#Y  
* @author treeroot mUy/lo'4  
* @since 2006-2-2 Ao96[2U6  
* @version 1.0 jn\\,n"6  
*/ JXj`  
public class ImprovedQuickSort implements SortUtil.Sort { ^ +{ ~ ^y7  
xSb/9 8;  
private static int MAX_STACK_SIZE=4096; ?p5RSt  
private static int THRESHOLD=10; E08AZOY&g  
/* (non-Javadoc) B4R,[WE"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `@.YyPxX\  
*/ pq5)Ug  
public void sort(int[] data) { w]yLdfi!  
int[] stack=new int[MAX_STACK_SIZE]; 5, Yk5?l<'  
v,>F0ofJ  
int top=-1; 54F([w  
int pivot; 8zj09T[  
int pivotIndex,l,r; l^`!:BOtR  
D~f.)kkC4  
stack[++top]=0; .M>u:,v  
stack[++top]=data.length-1; ">fgoDQ  
QHs=Zh;"  
while(top>0){ rvE!Q=y~  
int j=stack[top--]; %n}.E30 4  
int i=stack[top--]; oU~V0{7g  
!+)$;`  
pivotIndex=(i+j)/2; L&3=5Bf9  
pivot=data[pivotIndex]; Tjs-+$P+  
uFdSD  
SortUtil.swap(data,pivotIndex,j); iI&SI#; _  
=As'vt 0  
file://partition 5!nZvv  
l=i-1; YSrFHVq  
r=j; M~662]Ekk  
do{ FeV=4tsy  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); tDN-I5q  
SortUtil.swap(data,l,r); l"*>>/U k  
} ZQBo|8*  
while(l SortUtil.swap(data,l,r);  j Mp{  
SortUtil.swap(data,l,j); l3g6y 9;  
30H:x@='9  
if((l-i)>THRESHOLD){ dN*<dz+4r  
stack[++top]=i; L0&!Qct  
stack[++top]=l-1; V$v;lvt^Uq  
} M2xUs  
if((j-l)>THRESHOLD){ bkOm/8k|4  
stack[++top]=l+1; j|aT`UH03  
stack[++top]=j; E"G. _<3J8  
} ?tA- `\E  
Y"l!3^   
} _)Qt,$  
file://new InsertSort().sort(data); bfpW ^y  
insertSort(data); d'3'{C|kk  
} Ne9 .wd  
/** p`d:g BZ  
* @param data S?3{G@!  
*/ k6Tpaf^  
private void insertSort(int[] data) { !m(6/*PAl  
int temp; kT$4X0}  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); H>7!+&M  
} 4x C0Aw  
} *E. 2R{  
} 9hguC yr@h  
~r>UjC_ B:  
} Mvcl9  
i'5bPW  
归并排序: 2Qk\}KWs  
#ASu SQ  
package org.rut.util.algorithm.support; lmc-ofEv  
8v6rS-iHP  
import org.rut.util.algorithm.SortUtil; gRqz8UI  
{W4t]Ff  
/** {(MG: B  
* @author treeroot |y=gp  
* @since 2006-2-2 x< 3vA|o  
* @version 1.0 Rw\DJJrz  
*/ ud#8`/!mq  
public class MergeSort implements SortUtil.Sort{ &1u ?W%(Px  
:<(<tz7dj  
/* (non-Javadoc) RCX4;,DHx  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B+B v(p  
*/ Z\7bp&&  
public void sort(int[] data) { 3}gK`1Nq1  
int[] temp=new int[data.length]; AN1bfF:C  
mergeSort(data,temp,0,data.length-1); w`v\/a_  
} !*ucVv;  
<?7~,#AK  
private void mergeSort(int[] data,int[] temp,int l,int r){ v}mmY>M%  
int mid=(l+r)/2; uJ y@  
if(l==r) return ; *Xnq1_K}  
mergeSort(data,temp,l,mid); }wb;ulN)  
mergeSort(data,temp,mid+1,r); enr mjA&3  
for(int i=l;i<=r;i++){ ~VGK#'X:  
temp=data; 0`thND)?O  
} >k jJq]A2  
int i1=l; N~kYT\$b#  
int i2=mid+1; ;C<A }  
for(int cur=l;cur<=r;cur++){ !Yf0y;e|:  
if(i1==mid+1) )gLasR.1  
data[cur]=temp[i2++]; Bx)&MYY}[[  
else if(i2>r) x M[#Ah)  
data[cur]=temp[i1++]; Ol@ZH_  
else if(temp[i1] data[cur]=temp[i1++]; U,S286  
else ?C{N0?[P-  
data[cur]=temp[i2++]; 9|m  L  
} ~>R)H#mP7  
} zK92:+^C   
$F%?l\7j  
} G<eJ0S  
X9j+$X \j  
改进后的归并排序: 'W*F[U*&HP  
qsRh ihPX  
package org.rut.util.algorithm.support; 5=986ci$U  
9 JtG&^*  
import org.rut.util.algorithm.SortUtil; l:"*]m7o_  
jFv<]D%A[  
/** Uy:.m  
* @author treeroot ?0a 0 R  
* @since 2006-2-2 hdL2`5RFF  
* @version 1.0 VLN3x.BY  
*/ 9R[','x  
public class ImprovedMergeSort implements SortUtil.Sort { WGx>{'LJ  
#w@Pa L iS  
private static final int THRESHOLD = 10; aB)DX  
' ^^K#f8  
/* U*TN/6Qy.  
* (non-Javadoc) ~4<3`l=A  
* sCl,]g0{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k]iS3+nD  
*/ kDh(~nfj  
public void sort(int[] data) { bYc qscW  
int[] temp=new int[data.length]; HWBom8u0  
mergeSort(data,temp,0,data.length-1); 5aNDW'z`f  
} :bDA<B6bb  
/f<(K-o]  
private void mergeSort(int[] data, int[] temp, int l, int r) { i#=X#_ +El  
int i, j, k; @k,(i=**  
int mid = (l + r) / 2; 3(&F.&C$$  
if (l == r) EYG E#C; d  
return; M(uB ;Te  
if ((mid - l) >= THRESHOLD) 9a%@j ]  
mergeSort(data, temp, l, mid); nW_  
else ~2431<YV  
insertSort(data, l, mid - l + 1); PEIr-qs%D  
if ((r - mid) > THRESHOLD) dDbC0} x/  
mergeSort(data, temp, mid + 1, r); eb\`)MI/  
else <GRf%zJ  
insertSort(data, mid + 1, r - mid); 9A(K_d-!H  
+GU16+w~E  
for (i = l; i <= mid; i++) { >}*jsqaVU  
temp = data; OvG0UXRU  
} *,*qv^  
for (j = 1; j <= r - mid; j++) { Dt.Wb&V_w  
temp[r - j + 1] = data[j + mid]; / nFw  
} X)OP316yx  
int a = temp[l]; Qu_T&  
int b = temp[r]; hp4(f W  
for (i = l, j = r, k = l; k <= r; k++) { %Qz`SO8x?  
if (a < b) { ;%alZ  
data[k] = temp[i++]; v6\2m c.  
a = temp; TWEqv<c  
} else { ;@ X   
data[k] = temp[j--]; J*X.0&Toc  
b = temp[j]; J9.p8A^^2  
} E(_I3mftm  
} nk 9 K\I  
} reJ?38(  
m0\}Cc  
/** vP NZFi-(  
* @param data =Gz>ZWF  
* @param l ,{*fOpn  
* @param i @I6A9do  
*/ KB*=a   
private void insertSort(int[] data, int start, int len) { 7=A9E]:  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {Y%=/ba W  
} F|`B2Gr  
} [#'_@zZz  
} Qmx~_  
} ^3o8F  
i bs "Iv34  
堆排序: no6]{qn=6  
jdf)bO(9#  
package org.rut.util.algorithm.support; wLe&y4  
e*6` dz@  
import org.rut.util.algorithm.SortUtil; #@s~V<rW  
<" l;l~Y1  
/** , %O3^7i  
* @author treeroot `f+g A  
* @since 2006-2-2 E*CQG;^=N  
* @version 1.0 !BuJC$  
*/ TcmZ0L^O  
public class HeapSort implements SortUtil.Sort{ Bl\kU8O-  
A!Ct,%   
/* (non-Javadoc) k]9>V@C  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *js$r+4  
*/ W?J[K;<  
public void sort(int[] data) { S_VncTIO  
MaxHeap h=new MaxHeap(); -f|^}j?  
h.init(data); @SG"t,5s  
for(int i=0;i h.remove(); +u:O AsR  
System.arraycopy(h.queue,1,data,0,data.length); "gajBY  
} '/gwC7*-&  
@<yc .>  
private static class MaxHeap{ :wmf{c  
Y6? mY!  
void init(int[] data){ ]J=)pD rk  
this.queue=new int[data.length+1]; /1#Q=T  
for(int i=0;i queue[++size]=data; xWe1F2nY  
fixUp(size); vP)~j1  
} Rn_W|"  
} p<fgUVR  
7"NJraQ6  
private int size=0; :fKz^@mY4  
YkAWKCOni  
private int[] queue; `Mp7 })  
Bp{`%86S E  
public int get() { 7 +hF;  
return queue[1]; ~w9 =Fd6  
} m&~Dj#%(w  
@mRrA#E#{  
public void remove() { aa%&&  
SortUtil.swap(queue,1,size--); n9fA!Wic  
fixDown(1); fy>And*  
} iA{jKk=  
file://fixdown r5da/*G/O  
private void fixDown(int k) { z/&a\`DsU  
int j; N z3%}6F:  
while ((j = k << 1) <= size) { xXxh3 k\  
if (j < size %26amp;%26amp; queue[j] j++; qq7X ",s  
if (queue[k]>queue[j]) file://不用交换 \ jXN*A  
break; |-Esc|J(  
SortUtil.swap(queue,j,k); LI;EfyL  
k = j; ~ 9~\f  
} xP6?es`  
} ?r E]s!K  
private void fixUp(int k) { {$1$]p~3 o  
while (k > 1) { B"Kce"!  
int j = k >> 1; J[Yg]6  
if (queue[j]>queue[k]) akCo+ @  
break; [gns8F#H\  
SortUtil.swap(queue,j,k); h 4.=sbzZ  
k = j;  ; zE5(3x  
} SP?U@w%}  
} chMc(.cN0  
fDEu%fUYZ  
} i@R$g~~-D  
/< 7C[^h{-  
} PWN'.HQ  
;, v L  
SortUtil: P9TBQW2G{  
+=~%S)9F  
package org.rut.util.algorithm; O:^LQ  
zPh\3B  
import org.rut.util.algorithm.support.BubbleSort; 5H :~6z  
import org.rut.util.algorithm.support.HeapSort; X*9N[#wu6  
import org.rut.util.algorithm.support.ImprovedMergeSort; } wOpPN[4  
import org.rut.util.algorithm.support.ImprovedQuickSort; :{ WrS  
import org.rut.util.algorithm.support.InsertSort; 'bI~61{A  
import org.rut.util.algorithm.support.MergeSort; } B9~X  
import org.rut.util.algorithm.support.QuickSort; P&%eIgAOL  
import org.rut.util.algorithm.support.SelectionSort; "(\) &G  
import org.rut.util.algorithm.support.ShellSort; =i^<a7M~  
4,F3@m:<  
/** Cq*}b4^;  
* @author treeroot ^*x Hy`  
* @since 2006-2-2 M|({ 4C  
* @version 1.0 %w8GGm8^/  
*/ _:Jp*z  
public class SortUtil { s\C8t0C  
public final static int INSERT = 1; #;"D)C  
public final static int BUBBLE = 2; :IR9=nhS]  
public final static int SELECTION = 3; 6%\Q*r*N  
public final static int SHELL = 4; l /png:  
public final static int QUICK = 5; MYhx'[4[3  
public final static int IMPROVED_QUICK = 6; xBRh !w  
public final static int MERGE = 7; {`H<=h__  
public final static int IMPROVED_MERGE = 8; c@ZS|U*(  
public final static int HEAP = 9; 4OOn,09  
<{cNgKd9  
public static void sort(int[] data) { JYg% ~tW'  
sort(data, IMPROVED_QUICK); 7*>S;$  
} o`\.I&Ij  
private static String[] name={ wLOQhviI^-  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (\T0n[  
}; x* =sRf  
y3cf[Q  
private static Sort[] impl=new Sort[]{ )b&-3$?  
new InsertSort(), GT'7,+<?N  
new BubbleSort(), *|k;a]HT  
new SelectionSort(), >^yc=mM(g3  
new ShellSort(), /j' B\,  
new QuickSort(), F?8BS*r_  
new ImprovedQuickSort(), @ 2!C^}d3F  
new MergeSort(), .;HIEj zq  
new ImprovedMergeSort(), J}(6>iuQY?  
new HeapSort() B+Y5b5+wOQ  
}; Z%+BWS3YqY  
C1T=O  
public static String toString(int algorithm){ a4T~\\,dZ>  
return name[algorithm-1]; 1 @%B?  
} BeI;#m0  
N~):c2Kp<9  
public static void sort(int[] data, int algorithm) { OpK. Lsd0y  
impl[algorithm-1].sort(data); 8wII{FHX  
} +:>JZ$  
[Y$5zeA  
public static interface Sort { 3duG.iUlL  
public void sort(int[] data); /Fe:h >6  
} e2k4[V  
79SqYe=&uy  
public static void swap(int[] data, int i, int j) { @n7t?9Bx  
int temp = data; L\}Pzxn  
data = data[j]; ]am~aJ|L  
data[j] = temp; 6X7s 4  
} a#+>w5  
} B f5&}2u  
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