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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。 .vF< 3p|  
插入排序: .-6s`C2 Y}  
RKb3=} *C  
package org.rut.util.algorithm.support; m)2hl~o_  
!fjU?_[S  
import org.rut.util.algorithm.SortUtil; MQMy Z:  
/** h#;K9#x6  
* @author treeroot i4C b&h^  
* @since 2006-2-2 QjbPBk Q  
* @version 1.0 BCB/cBE  
*/ <a}|G1 h  
public class InsertSort implements SortUtil.Sort{ zd]L9 _  
ghR]$SG  
/* (non-Javadoc) fB}5,22  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'ZgW~G]S  
*/ 6U3@-+lF  
public void sort(int[] data) { )L("t  
int temp; HCy}'}d  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); )cBV; E<  
} ~}ZX^l&k{P  
} 1h0ohW  
} 'MlC 1HEp  
Zpd>' ${4  
} KTJ $#1q  
Q*{ 2  
冒泡排序: ,IB)Kk2  
1OeDWEcB  
package org.rut.util.algorithm.support; )O(Gw-jWE  
u <2sb;a  
import org.rut.util.algorithm.SortUtil; 7ij=%if2@k  
gZ  Si\m>  
/** OB@t(KNx*P  
* @author treeroot D4-U[l+K>  
* @since 2006-2-2 -iX!F~qS,  
* @version 1.0 L,GtIZkE  
*/ 5-po>1g'  
public class BubbleSort implements SortUtil.Sort{ y_r6T XnGL  
X*) :N]  
/* (non-Javadoc) G\AQql(f4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a-5$GvG  
*/ Db:WAjU  
public void sort(int[] data) { dPX>A4wp  
int temp; IsL/p3|  
for(int i=0;i for(int j=data.length-1;j>i;j--){ :|Ty 0>k  
if(data[j] SortUtil.swap(data,j,j-1); |?W   
} 8{ e 3  
} ;S j* {  
} 0P >dXd)T  
} yln.E vJjD  
E:OeU_\  
} \H12~=p`B  
 e n":  
选择排序: 8RD)yRJ  
pU/.|Sh  
package org.rut.util.algorithm.support; 4w[ta?&6B  
%c{)'X  
import org.rut.util.algorithm.SortUtil; K.zs;^  
,Ou)F;r  
/** KgS xF#  
* @author treeroot !!>G{  
* @since 2006-2-2 bm?TMhC  
* @version 1.0 g"f^YEQ_  
*/ o`0H(\en  
public class SelectionSort implements SortUtil.Sort { [RuY'  
$^>vJk<  
/* /HD2F_XA  
* (non-Javadoc) -lEh}r  
* r"{1H  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $sJfxh r  
*/ ?K#$81;[  
public void sort(int[] data) { w5\)di  
int temp; >fQN"(tf  
for (int i = 0; i < data.length; i++) { fXj  
int lowIndex = i; G8'3.;"W5  
for (int j = data.length - 1; j > i; j--) { WKML#U]5T  
if (data[j] < data[lowIndex]) { -]%@,L^@  
lowIndex = j; LOzKpvGl  
} #YdU,y=B  
} ?sE21m?b-  
SortUtil.swap(data,i,lowIndex); gV BV@v!W  
} $!w%=  
} ;wZ.p"T9^  
AR^Di`n!  
} v2R:=d ')>  
6 [E"  
Shell排序: rK wkj)  
PN=yf@<V3F  
package org.rut.util.algorithm.support; :f:C*mYvu  
y 6< tV.  
import org.rut.util.algorithm.SortUtil; ;<H2N0qJ(  
/.bwwj_;  
/** 471}'3  
* @author treeroot -`&;3 7  
* @since 2006-2-2 i YkNtqn/  
* @version 1.0 ^` THV  
*/ uyIA]OtyN  
public class ShellSort implements SortUtil.Sort{ Vo()J4L  
xH uyfQLk  
/* (non-Javadoc) ipG+qj/=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )&K%Me  
*/ "H8N,eb2  
public void sort(int[] data) { fJKOuFK  
for(int i=data.length/2;i>2;i/=2){ zT"#9"["  
for(int j=0;j insertSort(data,j,i); ML-g"wv  
} >E3OYa?G  
} *6DKU CA/  
insertSort(data,0,1); J%'|IwA  
} Vv]mME@  
wW~2]*n  
/** PoZBiw@  
* @param data fsoS!6h0k  
* @param j SbY i|V,H  
* @param i ;7}*Xr|  
*/ Q>$v~v?9  
private void insertSort(int[] data, int start, int inc) { b._pG(o1  
int temp; e6Y0G,K  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ]h6<o*  
} tEl_A"^e  
} }<p%PyM  
} I]58;|J  
L 'y+^L|X  
} %o>1$f]  
q_bB/   
快速排序: E),T,   
`fXcW)  
package org.rut.util.algorithm.support; rE 8-MB  
Rd/!CJ@g  
import org.rut.util.algorithm.SortUtil; lCXo+|$?s  
 OxRzKT  
/** 2\ n6XAQ*  
* @author treeroot qW*)]s)z  
* @since 2006-2-2 G8VWx&RE  
* @version 1.0 !WN r09`  
*/ }tN"C 3)@  
public class QuickSort implements SortUtil.Sort{ Flsf5 Tr0  
^)WG c/  
/* (non-Javadoc) cVN|5Y   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |yr}g-m  
*/ JXrMtSp\  
public void sort(int[] data) { Nsb13mlY  
quickSort(data,0,data.length-1); J c*A\-qC.  
} LvS`   
private void quickSort(int[] data,int i,int j){ bA:abO  
int pivotIndex=(i+j)/2; SX#ATf6#  
file://swap 0t8-oui  
SortUtil.swap(data,pivotIndex,j); [LE_lATjU  
Y&nY]VV  
int k=partition(data,i-1,j,data[j]); :|bPr_&U$  
SortUtil.swap(data,k,j); {>#Ya;E  
if((k-i)>1) quickSort(data,i,k-1); *:iFhKFU  
if((j-k)>1) quickSort(data,k+1,j); JdE=!~\8  
R/=yS7@{)  
} zrcSPh  
/** 9"[#\TW9Vb  
* @param data S[Et!gj:  
* @param i /n_N`VJ7H  
* @param j HjrCX>v  
* @return lq74Fz&(  
*/ k 2~j:&p  
private int partition(int[] data, int l, int r,int pivot) { -O\`G<s%  
do{ c(:GsoO  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); d4/ZOj+%  
SortUtil.swap(data,l,r); #-{4F?DA]y  
} b$hQB090  
while(l SortUtil.swap(data,l,r); tlE+G@|^  
return l; !"Kg b;A  
} V<b"jCXI  
>5\rU[H>  
} j:g/[_0s  
"Mth<%i  
改进后的快速排序: 'j|;M  
MOXDR  
package org.rut.util.algorithm.support; 2!A/]:[F  
d:3G4g  
import org.rut.util.algorithm.SortUtil; ."${.BPn~  
>354O6  
/** =4G9ev 4  
* @author treeroot Hc71 .rqS  
* @since 2006-2-2 krgsmDi7  
* @version 1.0 _15r!RZ:1  
*/ :2La,  
public class ImprovedQuickSort implements SortUtil.Sort { I_Q'+d  
>Py=H+d!j  
private static int MAX_STACK_SIZE=4096; UPH:$Fk&  
private static int THRESHOLD=10; *g7dB2{  
/* (non-Javadoc) qvCl mZ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s {!F@^a  
*/ RDZl@ps8  
public void sort(int[] data) { IYd)Vv3'j  
int[] stack=new int[MAX_STACK_SIZE]; fN@2 B  
ydw')Em  
int top=-1; {$b]K-B  
int pivot; e(sQgtM6  
int pivotIndex,l,r; oE}1D?3Sp  
E}UlQq  
stack[++top]=0; H13|bM<  
stack[++top]=data.length-1; 2%QY~Ku~  
J?HYN%  
while(top>0){ }{s<!b  
int j=stack[top--]; jlItPd C v  
int i=stack[top--]; _rOKif?5  
!9B)/Xi  
pivotIndex=(i+j)/2; `zF=h#i  
pivot=data[pivotIndex]; k \|Hd"T  
~)ls.NXI  
SortUtil.swap(data,pivotIndex,j); Pn0V{SJOJ%  
B+ +:7!  
file://partition .Gw;]s3  
l=i-1; 't]=ps  
r=j; D3$}S{Yw1  
do{ El ,p}Bi.  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); M(xd:Fa?  
SortUtil.swap(data,l,r); ;a2TONW   
} 42mdak}\  
while(l SortUtil.swap(data,l,r); {2A/@$?  
SortUtil.swap(data,l,j); p "u5wJ_  
?Yxk1Y4ig)  
if((l-i)>THRESHOLD){ jT%k{"+>+?  
stack[++top]=i; i!9yN: m0  
stack[++top]=l-1; K[O'@v  
} s#>Bwn&b)  
if((j-l)>THRESHOLD){ j*xxOwf  
stack[++top]=l+1; ?J|~ G{yH  
stack[++top]=j; k1W q$KCwG  
} iXeywO2nP  
zmF_-Q`c  
} F|9 W7  
file://new InsertSort().sort(data); Qn_*(CSp  
insertSort(data); h5>JBLawQP  
} "9aiin  
/** ; 7k@_  
* @param data Mz_*`lRN  
*/ -:&qNY:Vp  
private void insertSort(int[] data) { /aP4'U8ov  
int temp; W&qE_r  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); %&0_0BU  
} 8V?O=3<a  
} HsO4C)/  
} B/7c`V  
Cwl#(; @  
} va[@XGaC3  
`L/\F,  
归并排序: NLf6}  
LNPwb1)  
package org.rut.util.algorithm.support; u?r=;:N|y  
*H8(G%a!^  
import org.rut.util.algorithm.SortUtil;  $ac VJI?  
 ,SNN[a  
/** 0P_qtS  
* @author treeroot ?VmE bl  
* @since 2006-2-2 ] X%T^3%G  
* @version 1.0 9q(*'rAm  
*/ >fNRwmi  
public class MergeSort implements SortUtil.Sort{ MIGcV9hf  
Lj`MFZ  
/* (non-Javadoc) 6SJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H:TRJ.!w2  
*/ ju~js  
public void sort(int[] data) { Sxa+"0d6  
int[] temp=new int[data.length]; \4zb9CxOZ  
mergeSort(data,temp,0,data.length-1); O0[.*xG  
} 2|8e7q:+*  
Hx5t![g2K!  
private void mergeSort(int[] data,int[] temp,int l,int r){ ckG`^<  
int mid=(l+r)/2; 9)}Nx>K  
if(l==r) return ; vau0Jn%=ck  
mergeSort(data,temp,l,mid); z)*7LI  
mergeSort(data,temp,mid+1,r); >VIb|YA  
for(int i=l;i<=r;i++){ XR3=Y0YDf  
temp=data; kqdF)Wa am  
} kwF4I )6  
int i1=l; 1 w*DU9f  
int i2=mid+1; U51C /A  
for(int cur=l;cur<=r;cur++){ Q4i@y6z  
if(i1==mid+1) =wE1j  
data[cur]=temp[i2++]; ancs  
else if(i2>r) m_ >+$uL  
data[cur]=temp[i1++]; HY|=Z\l"  
else if(temp[i1] data[cur]=temp[i1++]; 2B Dz \  
else 0Rgo#`7l  
data[cur]=temp[i2++]; ='"DUQH|*  
} b}s)3=X@q  
} `tZm  
csABfxib  
} ay4E\=k  
%\<SSp^n  
改进后的归并排序: a$-:F$z  
;c};N(2  
package org.rut.util.algorithm.support; zI1-l9 o  
Qv4g#jX{  
import org.rut.util.algorithm.SortUtil;  #4?Z|_j3  
RHe'L36W  
/** bruM#T@}  
* @author treeroot &ZmWR  
* @since 2006-2-2 ]w*w@:Zk  
* @version 1.0 {\u=m>2U|  
*/ D}YAu,<K  
public class ImprovedMergeSort implements SortUtil.Sort { d'y\~M9(  
KicPW}_  
private static final int THRESHOLD = 10; 9b88):[qO  
L!2BE[~  
/* +OM`c7M:  
* (non-Javadoc) EdgcdSb7  
* lyZ[t PS  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ! 3&_#VO  
*/ afE`GG-  
public void sort(int[] data) { *|97 g*G(  
int[] temp=new int[data.length]; fjGY p  
mergeSort(data,temp,0,data.length-1); J)yNp,V  
} ii,/omn:  
bvpP/LeY  
private void mergeSort(int[] data, int[] temp, int l, int r) { (x"TM),Q  
int i, j, k; `*Ar6  
int mid = (l + r) / 2; 5ctH=t0  
if (l == r) N i\*<:_  
return; t.f#_C\  
if ((mid - l) >= THRESHOLD) mV\QZfoF  
mergeSort(data, temp, l, mid); YhpNeP{A  
else gpt98:w:  
insertSort(data, l, mid - l + 1); s{q)P1x  
if ((r - mid) > THRESHOLD) B{`4"uEb$G  
mergeSort(data, temp, mid + 1, r); ea7l:(C  
else <S/`-/= 2  
insertSort(data, mid + 1, r - mid); LY> -kz]  
8~q%H1[I\N  
for (i = l; i <= mid; i++) { o'uv5asdb  
temp = data; -^a?]`3_v  
} 60*;a*cy  
for (j = 1; j <= r - mid; j++) { #A&(b}#:o  
temp[r - j + 1] = data[j + mid]; Nw 74T  
} @t W;(8-  
int a = temp[l]; UM?{ba9  
int b = temp[r]; CY{`IZ  
for (i = l, j = r, k = l; k <= r; k++) { (+_i^SqK  
if (a < b) { ah1DuTT/G  
data[k] = temp[i++]; 8+gti*C?\  
a = temp; %x Xib9J  
} else { io8c[#"uU  
data[k] = temp[j--]; f[}N  
b = temp[j]; 4O~E4" ]  
} )}{V#,xz@  
} l,(Mm,3  
} `/+%mKlC|[  
>=<qAkk  
/** 4s{_(gy  
* @param data ^Md]e<WAp  
* @param l k{fTq KS%h  
* @param i qT U(]O1  
*/ O^tH43C  
private void insertSort(int[] data, int start, int len) { }digw(  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .Fdqn?c|+  
} Q"2t :  
} GoVB1)  
} G'*_7HD  
} WGxe3(d  
_3G;-iNX;  
堆排序: m %mA0r  
?B&Z x-krd  
package org.rut.util.algorithm.support; ! y1]S .;  
AYB =iLa  
import org.rut.util.algorithm.SortUtil; J?Y1G<&  
A..,.   
/** ?2#!63[Kg  
* @author treeroot h}vzZZ2,  
* @since 2006-2-2 pWU3?U  
* @version 1.0 7.-g=Rcz  
*/ ZjlFr(  
public class HeapSort implements SortUtil.Sort{ cy0 %tsB|  
\ow3_^Bk  
/* (non-Javadoc) u9d4zR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MT`gCvoF4P  
*/ J2c.J/o  
public void sort(int[] data) { z0XH`H|~  
MaxHeap h=new MaxHeap(); f^ q0#+k)  
h.init(data); "K.XoG4|  
for(int i=0;i h.remove(); N k~Xz  
System.arraycopy(h.queue,1,data,0,data.length); qNhV zx  
} a!`b`r -4  
6##}zfl  
private static class MaxHeap{ D4CN%^?  
>g):xi3qK  
void init(int[] data){ +Lq;0tRC  
this.queue=new int[data.length+1]; $~#N1   
for(int i=0;i queue[++size]=data; 994   
fixUp(size); k>W5ts2+  
} KJ7[DN'(  
} $jLJ&R=?]  
M"q]jeaM  
private int size=0; =44hI86  
vcsrI8+  
private int[] queue; 2>Uy`B|f  
FQV]/  
public int get() { WYHr'xJ  
return queue[1]; Iyo ey  
} @B<B#  
DXbzl +R  
public void remove() { eSV_.uvsb  
SortUtil.swap(queue,1,size--); *b{C`[ =V  
fixDown(1); q>$[<TsE&}  
} bzz{ p1e  
file://fixdown ^8_`IT  
private void fixDown(int k) { ) h*)_7  
int j; uO4kCK<7C  
while ((j = k << 1) <= size) { auV'`PR  
if (j < size %26amp;%26amp; queue[j] j++; >DHpD?Pm!  
if (queue[k]>queue[j]) file://不用交换 aJnZco6  
break; =cy;{2S'p  
SortUtil.swap(queue,j,k); f87> ul!*  
k = j; Hk65c0  
} c*O{?b  
} c1v,5c6d j  
private void fixUp(int k) { Ch`nDIne  
while (k > 1) { 0YMmWxV  
int j = k >> 1; vV2px  
if (queue[j]>queue[k]) aFI?^"L  
break; O@.afk"{  
SortUtil.swap(queue,j,k); nm[ yp3B  
k = j; k+(UpO=/*  
} S Z@ JzOA  
} 1wx&/ #a  
MX3ss,F  
} =xO  q-M  
/eM_:H5  
} k'_p*H  
,n')3r   
SortUtil: 8QFn/&Ql$B  
i.4L;(cg  
package org.rut.util.algorithm; oB3,"zY  
&hK5WP6whW  
import org.rut.util.algorithm.support.BubbleSort; -:O~J#D  
import org.rut.util.algorithm.support.HeapSort; VrV* -J'  
import org.rut.util.algorithm.support.ImprovedMergeSort; ^':Az6Z  
import org.rut.util.algorithm.support.ImprovedQuickSort; W#p A W  
import org.rut.util.algorithm.support.InsertSort; >s@6rNgf  
import org.rut.util.algorithm.support.MergeSort; Cm4$&?  
import org.rut.util.algorithm.support.QuickSort; X%S9 H^9  
import org.rut.util.algorithm.support.SelectionSort; N XAP=y3  
import org.rut.util.algorithm.support.ShellSort; .3(=U Q  
$(2c0S{1  
/** s+"[S%  
* @author treeroot *^'$YVd#  
* @since 2006-2-2 _$OhV#LKG  
* @version 1.0 d|,,,+fS  
*/ jg ~;s  
public class SortUtil { 3I)!.N[m  
public final static int INSERT = 1; G\ twx ;  
public final static int BUBBLE = 2; 97H2hYw9l  
public final static int SELECTION = 3; X#s:C=q1  
public final static int SHELL = 4; !}sYPz]7!  
public final static int QUICK = 5; )N{Qpbh  
public final static int IMPROVED_QUICK = 6; <{C oM  
public final static int MERGE = 7; 48.2_H<  
public final static int IMPROVED_MERGE = 8; X X>Y]P a  
public final static int HEAP = 9; E6);\SJG}  
RvL-SI%E  
public static void sort(int[] data) { dAOmqu, 6  
sort(data, IMPROVED_QUICK); X&^8[,"  
} I,{9vew  
private static String[] name={ 'ADaz75`*r  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E' p5  
}; %@<}z|.4  
9R XT  
private static Sort[] impl=new Sort[]{ /rd6p{F  
new InsertSort(), 05 ".;(  
new BubbleSort(), (7nWv43  
new SelectionSort(), 7y",%WYSD  
new ShellSort(), Qtmsk:qm  
new QuickSort(), MSPzOJQPy  
new ImprovedQuickSort(), K5x&:z  
new MergeSort(), >w:px$g4  
new ImprovedMergeSort(), ziuhS4k  
new HeapSort() H'uRgBjWJ  
}; 0T!_;IQ  
u7!X#<  
public static String toString(int algorithm){ ;{]%ceetcu  
return name[algorithm-1]; P ;>8S:8  
} V Iof4?i  
Im{I23.2  
public static void sort(int[] data, int algorithm) { _oxc~v\<  
impl[algorithm-1].sort(data); <Bc J;X/  
} +p =n-  
w'q}aQS  
public static interface Sort { u</21fz'  
public void sort(int[] data); ~ifo7,  
} UzVnC:  
?i*kwEj=  
public static void swap(int[] data, int i, int j) { %g3@m5&  
int temp = data; 3@e#E4+ff  
data = data[j]; 6Lw34R  
data[j] = temp; WU-.lg'c'  
} kV7c\|N9  
} i(q%EMf  
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