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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。 |qz&d=>  
插入排序: LDh,!5G-M  
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package org.rut.util.algorithm.support; Fxv5kho  
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import org.rut.util.algorithm.SortUtil; 3 nnoXc'  
/** s`gfz}/  
* @author treeroot bYBEh n  
* @since 2006-2-2 $Ts;o  
* @version 1.0 SZ1yy["  
*/ 6_g:2=6S  
public class InsertSort implements SortUtil.Sort{ X.+|o@G  
$8WWN} OC  
/* (non-Javadoc) \>[k0<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b} FhC"'i  
*/ %ty`Oa2  
public void sort(int[] data) { M@+Pq/f:  
int temp; mI'&!@WG  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); -car>hQq  
} s w{e |  
} o[)*Y`xq<w  
} 3?e~J"WXC5  
i2+_~$f  
} -G(#,rXk  
]-;MY@  
冒泡排序: spT$}F2n  
>R}G  
package org.rut.util.algorithm.support; K5!OvqzG  
dngG=  
import org.rut.util.algorithm.SortUtil; M $f6. j  
!<>*|a  
/** eZBC@y  
* @author treeroot N}>[To3  
* @since 2006-2-2 2Q5 -.2]  
* @version 1.0 8]D0)  
*/ foUB/&Ee  
public class BubbleSort implements SortUtil.Sort{ 0< 93i   
CaC \\5wl  
/* (non-Javadoc) HD'adj_,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cx]H8]ch7  
*/ //'&a-%$^  
public void sort(int[] data) { +Fb+dU  
int temp; RM;Uq >l  
for(int i=0;i for(int j=data.length-1;j>i;j--){ /@B2-.w  
if(data[j] SortUtil.swap(data,j,j-1); C5g9Gg  
} ! (Q[[M  
} ?|~KF:,#}  
} _y&XFdp  
} u+^KP>rM(  
f,x;t-o+R  
} }bSDhMV;  
c h}wXn  
选择排序: #\ uB!;Q  
UA|\D]xe  
package org.rut.util.algorithm.support; ^a<kp69qS  
b gxk:$E  
import org.rut.util.algorithm.SortUtil; `<{LW>Lb  
"  sC]z}  
/** />N#PF  
* @author treeroot \SoT^PW  
* @since 2006-2-2 e+V8I&%  
* @version 1.0 {Fqwr>e  
*/ 5'(T*"  
public class SelectionSort implements SortUtil.Sort { HX)]@qL  
IXG@$O?y/  
/* 5mS/,fs@  
* (non-Javadoc) k*v${1&  
* #0PZa$kM(o  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n =WH=:&  
*/ TOhWfl;  
public void sort(int[] data) { mfG m>U  
int temp; Gu@C* .jj!  
for (int i = 0; i < data.length; i++) { E*h!{)z@F  
int lowIndex = i; N\];{pe>  
for (int j = data.length - 1; j > i; j--) { AOJ[/YpM  
if (data[j] < data[lowIndex]) { XhA tf @n  
lowIndex = j; I{h KN V  
} 0' oXA'L-J  
} Y'5(exW  
SortUtil.swap(data,i,lowIndex); KaX*) P  
} P aeq  
} g)R2V  
N6v?Qzvi  
} P*H0Hwn;  
S}a]Bt  
Shell排序: @+l=R|  
J ?EDz,  
package org.rut.util.algorithm.support; 8t. QFze?  
Bgn%d4W;G  
import org.rut.util.algorithm.SortUtil; vw4b@v-XQ3  
^Ua6.RH8  
/** 4$WR8  
* @author treeroot ?O3d Sxi  
* @since 2006-2-2 `lQ;M?D  
* @version 1.0 \Z,{De%  
*/ t0GJ$])  
public class ShellSort implements SortUtil.Sort{ f%i%QZP  
8*x=Fm,Ok  
/* (non-Javadoc) %<!YjJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +g kJrw  
*/ [uK{``"  
public void sort(int[] data) { }Z{FPW.QK  
for(int i=data.length/2;i>2;i/=2){ !l=)$RJKdD  
for(int j=0;j insertSort(data,j,i); {z\K!=X/  
} lZuH:AH  
} -7]j[{?w  
insertSort(data,0,1); Y SB=n d_  
} T2/:C7zL  
!n` |k  
/** 22=sh;y+2  
* @param data IxS%V31  
* @param j iPCCTs  
* @param i 7~F~'V  
*/ xQ7U$QF|]  
private void insertSort(int[] data, int start, int inc) { "l9aBBiu  
int temp; 1. +6x4%rV  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); BjagG/ sX  
} gnjhy1o  
} N'WC!K.e  
} @"MQ6u G>  
[8^q3o7n  
} hl7 z1h  
/aMOZ=,q}  
快速排序: aWlIq(dU  
hxK;f  
package org.rut.util.algorithm.support; w]yVNB  
B~7!v${  
import org.rut.util.algorithm.SortUtil; oda,  
ruGeN  
/** M;,$ )>P  
* @author treeroot ]gg(Z!|iQ  
* @since 2006-2-2 fggs ;Le  
* @version 1.0 D[#V  
*/ jeJgDAUv  
public class QuickSort implements SortUtil.Sort{ `d$@1  
-YAtM-VL  
/* (non-Javadoc) FOk;=+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /KX+'@  
*/ 5K2K'ZkI  
public void sort(int[] data) { &H]/'i-  
quickSort(data,0,data.length-1); RG""/x ;  
} *; ]}`r  
private void quickSort(int[] data,int i,int j){ #MlpOk*G  
int pivotIndex=(i+j)/2; Y}v3J(l  
file://swap U31@++C[  
SortUtil.swap(data,pivotIndex,j); <K`E*IaW  
 L"%SU  
int k=partition(data,i-1,j,data[j]); eu9*3'@A  
SortUtil.swap(data,k,j); 4$[o;t>  
if((k-i)>1) quickSort(data,i,k-1); kI)}7e  
if((j-k)>1) quickSort(data,k+1,j); vM6W64S  
|[IyqWG9  
} C_kuW+H  
/** cO*g4VL"[  
* @param data N UX |  
* @param i QJRnpN/  
* @param j #$- E5R;x  
* @return - ~|Gwr"  
*/ >#x[qX  
private int partition(int[] data, int l, int r,int pivot) { =uH2+9.  
do{ {V2"Pym?  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); *H/3xPh,*  
SortUtil.swap(data,l,r); y'`/^>.  
}  '2*OrY  
while(l SortUtil.swap(data,l,r); a @2fJ}  
return l; !43 !JfD  
} l^9gFp~I  
z'_Fg0kR{  
} qrYbc~jI7  
uW(-?  
改进后的快速排序: 7>__ fQu  
HDhISPg  
package org.rut.util.algorithm.support; 9+^)?JUYll  
5 tQz!M  
import org.rut.util.algorithm.SortUtil; ;_e9v,  
Td|u@l4B  
/** GQn:lu3j:  
* @author treeroot %7)TiT4V  
* @since 2006-2-2 3X`9&0:j%  
* @version 1.0 v}6iI}r  
*/ >ep<W<b  
public class ImprovedQuickSort implements SortUtil.Sort { 31a,i2Q4  
\X:e9~  
private static int MAX_STACK_SIZE=4096; GDL/5m#  
private static int THRESHOLD=10; () _RLA  
/* (non-Javadoc) dA~:L`A|X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oh*~+/u}q  
*/ r |C.K  
public void sort(int[] data) { 3- Kgz  
int[] stack=new int[MAX_STACK_SIZE]; w}>%E6UY  
gmRc4o  
int top=-1; OL>>/T  
int pivot; *x|%Nua"  
int pivotIndex,l,r; 7@fS2mu  
6M*z`B{hV  
stack[++top]=0; q>.7VN[ vE  
stack[++top]=data.length-1; C~qZ&  
nc k/Dw  
while(top>0){ @%Ld\8vdfJ  
int j=stack[top--]; \Y)HSJR;e  
int i=stack[top--]; %Hbq3U30  
|l; Ot=C=  
pivotIndex=(i+j)/2; WzN c=@[W  
pivot=data[pivotIndex]; W^tD6H;  
'" "v7  
SortUtil.swap(data,pivotIndex,j); Swhz\/u9  
9j>2C  
file://partition 9:USxFM  
l=i-1; 't5ufAT  
r=j; 6(bN*.  
do{ Fvl\.  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 8(% F{&<;  
SortUtil.swap(data,l,r); 5wx_ol}2  
} JY#vq'dl|  
while(l SortUtil.swap(data,l,r); yS W$zA,  
SortUtil.swap(data,l,j); ZL6HD n!  
3\XNOJH  
if((l-i)>THRESHOLD){ cmG27\cRO  
stack[++top]=i; ,=u;1  
stack[++top]=l-1; sm/a L^4  
} ?%  24M\  
if((j-l)>THRESHOLD){ .*-8rOcc  
stack[++top]=l+1; 5E'/8xpbB  
stack[++top]=j; D$}8GYq  
} 2X@9o4_4q  
|IcW7(  
} ?}cmES kX@  
file://new InsertSort().sort(data); "[_j8,t`  
insertSort(data); .`OU\LA  
} F}_b7 |^  
/** ;'n%\*+fHH  
* @param data oRWje#4O  
*/ fs 'SCwx  
private void insertSort(int[] data) { 3CoZ2  
int temp;  ##rkyd  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); e"S?qpJK  
} P51M?3&=l  
} R5uG.Oj-2  
}  cca g8LC  
%;'~TtW5  
} t`Z'TqP R  
%GhI0F #  
归并排序: 1Toiqb/  
>3uNh:|>/  
package org.rut.util.algorithm.support; ,eyh%k*hz  
" ]S  
import org.rut.util.algorithm.SortUtil; O k`}\NZL  
s:3[#&PQpN  
/** +F8{4^w1  
* @author treeroot z{rV|vQ  
* @since 2006-2-2 -#|;qFD]  
* @version 1.0 <1|[=$w  
*/ Tx;a2:6\[  
public class MergeSort implements SortUtil.Sort{ =NF0E8O  
..)J6L5l  
/* (non-Javadoc) $l]:2!R  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qIi \[Ugh  
*/ k H.dtg_  
public void sort(int[] data) { r:g\  
int[] temp=new int[data.length]; FCE y1^u  
mergeSort(data,temp,0,data.length-1); %~!4DXrMk  
} ^K?-+  
d?fS#Ryb  
private void mergeSort(int[] data,int[] temp,int l,int r){ qbv\uYow3k  
int mid=(l+r)/2; >WSh)(Cg  
if(l==r) return ; o}rG:rhIh  
mergeSort(data,temp,l,mid); h9)S&Sk{s  
mergeSort(data,temp,mid+1,r); -5<[oBL;  
for(int i=l;i<=r;i++){ |R}=HsYey  
temp=data; >w S'z]T9  
} e(0OZ_w  
int i1=l; Ehx9-*]  
int i2=mid+1; <fUo@]Lv  
for(int cur=l;cur<=r;cur++){ S^rf^%  
if(i1==mid+1) Cyg2o<O@  
data[cur]=temp[i2++]; )E^S+ps  
else if(i2>r) [YOH'i&X  
data[cur]=temp[i1++]; 7}kJp%-  
else if(temp[i1] data[cur]=temp[i1++]; ! ?g+'OM  
else ix!xLm9\  
data[cur]=temp[i2++]; FzInIif  
} *fg2bz<~[B  
} bk0>f   
pa>C}jk}6  
} ZNQ x;51  
5CY%h  
改进后的归并排序: [neuwdN  
W@d&X+7e  
package org.rut.util.algorithm.support; QLd*f[n  
E8PDIjp  
import org.rut.util.algorithm.SortUtil; UGcmzwE  
^&>B,;Wu  
/** 7ch9Pf  
* @author treeroot mLhM_=  
* @since 2006-2-2 /v 8"i^;}  
* @version 1.0 Q~N,QMr)k&  
*/ sINQ?4_8T  
public class ImprovedMergeSort implements SortUtil.Sort { j"qND=15  
Nfa&r  
private static final int THRESHOLD = 10; ? :H+j6+f  
S{=5n R9j  
/* jK w 96  
* (non-Javadoc) FNQ<k[#K'~  
* ,2FK$: M\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b80#75Bj>  
*/ o"VKAP  
public void sort(int[] data) { d[a(u WEl  
int[] temp=new int[data.length]; "_WN[jm  
mergeSort(data,temp,0,data.length-1); #3&@FzD_P  
} =CLPz8  
|v!N1+v0  
private void mergeSort(int[] data, int[] temp, int l, int r) { OC=&!<  
int i, j, k; d(q1 ?{zr4  
int mid = (l + r) / 2; ;R?@ D]  
if (l == r) 0AB a&'h  
return; p'jc=bL E  
if ((mid - l) >= THRESHOLD) CWdsOS=  
mergeSort(data, temp, l, mid); T fLqxioqZ  
else J"r?F0  
insertSort(data, l, mid - l + 1); (D>_O$o  
if ((r - mid) > THRESHOLD) ;(i6 X)  
mergeSort(data, temp, mid + 1, r);  +mocSx[  
else <M:BN6-yG  
insertSort(data, mid + 1, r - mid); 7e"}ojt$  
8['R D`O  
for (i = l; i <= mid; i++) { .+:iAnf  
temp = data; Q#eMwM#~  
} T[\1=h]  
for (j = 1; j <= r - mid; j++) { HI8mNX3 "j  
temp[r - j + 1] = data[j + mid]; t13V>9to  
} Z[?n{vD7  
int a = temp[l]; -XBZ1q  
int b = temp[r]; !5ps,+o  
for (i = l, j = r, k = l; k <= r; k++) { Os9SfL  
if (a < b) { s)-oCT$[  
data[k] = temp[i++];  3 xyrWl  
a = temp; <h#*wy:o2  
} else { 5u$.!l8Nl  
data[k] = temp[j--]; g>/Y}{sL-  
b = temp[j]; \|HtE(uCM1  
} b| L;*<KU  
} s#X/ F  
} J M`w6}  
xi (@\A  
/** -xtT,^<B  
* @param data 9X*N k~}Y  
* @param l hr vTFJ  
* @param i &=@{`2&  
*/ z D{]3pg  
private void insertSort(int[] data, int start, int len) { 4(L mjue]?  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @)Vpj\jM-C  
} :60v bO  
} 7#LIGr  
} x3O%W?5  
} *6}M.`.-  
=$'>VPQ  
堆排序: #NM)  
U)(R4Y6 v  
package org.rut.util.algorithm.support; jq~`rE h9  
w'@gzK  
import org.rut.util.algorithm.SortUtil; Nv5^2^Sc=  
'cO8& |  
/** p(F@lL-  
* @author treeroot b <W\#3~G  
* @since 2006-2-2 JQQyl:=  
* @version 1.0 F.vRs|fk  
*/ !JCs'?A  
public class HeapSort implements SortUtil.Sort{ 7By7F:[b  
? |M-0{  
/* (non-Javadoc) v-8>@s jy8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OUulG16kK  
*/ x1gS^9MqCB  
public void sort(int[] data) { !gX xM,R  
MaxHeap h=new MaxHeap(); \+o\wTW  
h.init(data); fK/:  
for(int i=0;i h.remove(); iYXD }l;r  
System.arraycopy(h.queue,1,data,0,data.length); m212 gc0u  
} SAm%$v z%M  
"c%wq 0  
private static class MaxHeap{ WDc[+Xyw  
XFhH+4#]  
void init(int[] data){ 2!%)_<  
this.queue=new int[data.length+1]; 3bRxV @0.  
for(int i=0;i queue[++size]=data; Gk:fw#R  
fixUp(size); DGFSD Py[  
} FvsVfV U  
} Ct=bZW"j/  
VEWW[ T  
private int size=0; 4  %0s p  
O=Su E/q  
private int[] queue; kQ+y9@=/g  
PZ]tl  
public int get() { 5_9`v@-4_  
return queue[1]; }3z3GU8Q-  
} X'OpR   
k0Vri$x  
public void remove() {  u$?!  
SortUtil.swap(queue,1,size--); A'EI1_3{  
fixDown(1); C%4ed#  
} 8\{!*?9!  
file://fixdown !S?Fz]  
private void fixDown(int k) { $yOB-  
int j; <#0i*PM_  
while ((j = k << 1) <= size) { +^7cS6"L  
if (j < size %26amp;%26amp; queue[j] j++; !oz{XWE  
if (queue[k]>queue[j]) file://不用交换 UBd+,]"f  
break; 0AM_D >fH  
SortUtil.swap(queue,j,k); w:zo \  
k = j; <K)]kf  
} S}C[  
} YJ~<pH  
private void fixUp(int k) { )G48,. "  
while (k > 1) { CPZ{  
int j = k >> 1; SK}jhm"y  
if (queue[j]>queue[k]) Fo3*PcUv  
break; *~8F.c x  
SortUtil.swap(queue,j,k); O?vh]o  
k = j; Z}O]pm>=G  
} qGX@mo({  
} h3F559bw/<  
$:s@nKgnD~  
} 5AT^puL]]  
s9C^Cy^su  
} 0H_Ai=G  
qT?{}I  
SortUtil: W*LC3B^  
x(c+~4:_M  
package org.rut.util.algorithm; SGKAx<U  
&YIL As^8A  
import org.rut.util.algorithm.support.BubbleSort; M~zI;:0O  
import org.rut.util.algorithm.support.HeapSort; O/eZ1YAC  
import org.rut.util.algorithm.support.ImprovedMergeSort; ?;tPqOs&  
import org.rut.util.algorithm.support.ImprovedQuickSort; 2P:X_:`~[  
import org.rut.util.algorithm.support.InsertSort; ->ZP.7  
import org.rut.util.algorithm.support.MergeSort; s8 WB!x{t  
import org.rut.util.algorithm.support.QuickSort; Y%i<~"k  
import org.rut.util.algorithm.support.SelectionSort; 56C8)?  
import org.rut.util.algorithm.support.ShellSort; !$Uo$?gC  
ij]UAJ}t  
/** Dbn ~~P  
* @author treeroot e"866vc,  
* @since 2006-2-2 k_t|) J  
* @version 1.0 aQoB1 qd8  
*/ Q7x[08TI  
public class SortUtil { {/noYB<;  
public final static int INSERT = 1; fDr$Wcd~  
public final static int BUBBLE = 2; '6zZ`Ll9  
public final static int SELECTION = 3; hT^&*}G  
public final static int SHELL = 4; {^oohW -  
public final static int QUICK = 5; "e-z 2G@z  
public final static int IMPROVED_QUICK = 6; w,P@@Q E  
public final static int MERGE = 7; NFVu~t  
public final static int IMPROVED_MERGE = 8; 10Eun }  
public final static int HEAP = 9; XU7to]'K  
J *LPv9)  
public static void sort(int[] data) { L\mF[Kd#+T  
sort(data, IMPROVED_QUICK); bofI0f}5.  
} TqJ @l  
private static String[] name={ `:'ciY|%b  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }wo:1v8J  
}; ,?LE5]  
<^nS%hXEr  
private static Sort[] impl=new Sort[]{ Q7y' 0s  
new InsertSort(), w!UF^~  
new BubbleSort(), KY&Lv^1_|  
new SelectionSort(), SB%D%Zx6'%  
new ShellSort(), POk5+^  
new QuickSort(), ^m7y=CJM  
new ImprovedQuickSort(), 4lPO*:/  
new MergeSort(), 0$Tb5+H5  
new ImprovedMergeSort(), QP~["%}T  
new HeapSort() :G6CWE  
}; Fepsa;\sU  
ksq4t  
public static String toString(int algorithm){ n\;;T1rM  
return name[algorithm-1]; pYcs4f!?p  
} .?:#<=1  
Q>L(=j2t  
public static void sort(int[] data, int algorithm) { 9ug4p']  
impl[algorithm-1].sort(data); hV $Zr4'  
} iq3)}hGo  
IS" [<  
public static interface Sort { xqSZ {E:  
public void sort(int[] data); ?"'+tZ=f6  
} $mK;{9Z  
z1b@JCWE  
public static void swap(int[] data, int i, int j) { 1Z0Qkd(  
int temp = data; << =cZ.HP  
data = data[j]; hXFT(J=  
data[j] = temp; iUz?mt;k  
} 1E$\&*(  
} 7&,$  
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