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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。 E*`PD<:)H  
插入排序: GcDA0%i  
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package org.rut.util.algorithm.support; #4./>}G  
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import org.rut.util.algorithm.SortUtil; wU>Fz*  
/** R?{xs  
* @author treeroot ;N?(R\* 8  
* @since 2006-2-2 dW%t ph  
* @version 1.0 ]WYV  
*/ ?'Hd0)yZ  
public class InsertSort implements SortUtil.Sort{ b>VV/j4!/  
,h*N9}xYTi  
/* (non-Javadoc) mvK^')  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9I]Bt=2z  
*/ YLi6G Y  
public void sort(int[] data) { rR :ZTfJs"  
int temp; Q"C*j'n   
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); J@2wPKh?Yp  
} Rx&O}>"E>l  
} | bRU=dg  
} *U,J Q  
`(h^z>%  
} bsDA&~)s  
g i6s+2  
冒泡排序: 8T9 s:/%  
JJ7A` ;  
package org.rut.util.algorithm.support; h{iuk3G`h6  
n)"JMzjQ<  
import org.rut.util.algorithm.SortUtil; QMz=e  
hdCd:6   
/** e}1Q+h\  
* @author treeroot rAfz?  
* @since 2006-2-2 G(.G>8pf  
* @version 1.0 YB7n}r23  
*/ & H%/.4la  
public class BubbleSort implements SortUtil.Sort{ 9Z!n!o7D  
p$9Aadi]  
/* (non-Javadoc) Z::I3 Q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EN\cwa#FU  
*/ TT/H"Ri}Jp  
public void sort(int[] data) { t&?{+?p: 9  
int temp; (g@\QdH`|  
for(int i=0;i for(int j=data.length-1;j>i;j--){ XJ\R'?j  
if(data[j] SortUtil.swap(data,j,j-1); uAeo&|&  
} :vb5J33U  
} ,M.}Qak^  
} k3qQU)  
} Sp5:R75vI  
@6yc^DAA  
} m%`YAD@2z  
r[i^tIv6As  
选择排序: 7/IL" D  
;,[0bmL  
package org.rut.util.algorithm.support; B4RrUA32  
NUYKMo1ze  
import org.rut.util.algorithm.SortUtil; o13jd NQ-  
5OI.Ka  
/** q7Hf7^a  
* @author treeroot !92e$GJ} ;  
* @since 2006-2-2 = 0d|F 8  
* @version 1.0 :TU|:2+  
*/ NS z }  
public class SelectionSort implements SortUtil.Sort { z;>$["t]6  
'_G\_h}5  
/* ][S q^5`  
* (non-Javadoc) U<w8jVE  
* .@,t}:lD  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ad: qOm  
*/ !l0]IX` F  
public void sort(int[] data) { TM(y%!\  
int temp; {1OxJn1hd  
for (int i = 0; i < data.length; i++) { P0.cF]<m  
int lowIndex = i; "TJu<O"2  
for (int j = data.length - 1; j > i; j--) { rpR yB9  
if (data[j] < data[lowIndex]) { pr#%VM[':R  
lowIndex = j; %42a>piev  
} +-@n}xb@  
} nXRa_M(z8  
SortUtil.swap(data,i,lowIndex); +=8wZ]  
} v]V N'Hs?  
} ~JXz  
M4C8K{}  
} (lM,'  
T o["o!(;z  
Shell排序: %v8 &  
L?[m$l!T}  
package org.rut.util.algorithm.support; !Ap5Uwd  
;Sivu-%  
import org.rut.util.algorithm.SortUtil;  B(;MI`  
vdq=F|&  
/** AabQ)23R2  
* @author treeroot X,v.1#[  
* @since 2006-2-2 j hm3:;Z  
* @version 1.0 )*BZo>"  
*/ &THtQ1D  
public class ShellSort implements SortUtil.Sort{ ynIC (t  
G JRl{Y  
/* (non-Javadoc) r1r$y2v~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #BLHHK/[  
*/ ^+P.f[  
public void sort(int[] data) { wb.yGfJ  
for(int i=data.length/2;i>2;i/=2){ uy hh"[  
for(int j=0;j insertSort(data,j,i); '. "_TEIF  
} "b hK %N;  
} uBRlvNJ  
insertSort(data,0,1); <_xG)vwh.  
} dun`/QKV  
yI: ;+K  
/** |E1U$,s~u  
* @param data %P0  
* @param j KHAc!4lA  
* @param i w.x&3aG  
*/ u}nSdZC  
private void insertSort(int[] data, int start, int inc) { Gm B&TD m  
int temp; +c~&o83[  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); [q?RJmB]  
} 3xy2ZYw  
} x &R9m,  
} =5\*Zh1  
L/ 7AGR|;C  
} RzqgN*]lY  
%hSQ\T<8[o  
快速排序: +Hu\b&g  
G<7M;vRvP  
package org.rut.util.algorithm.support; @[g7\d  
BY~Tc5  
import org.rut.util.algorithm.SortUtil; wtYgHC}X  
~M}{rl.n=  
/** 6B?jc/V.R  
* @author treeroot }MQ:n8  
* @since 2006-2-2 T [SK>z  
* @version 1.0 Jc#D4e1#  
*/ 6M >@DRZ'|  
public class QuickSort implements SortUtil.Sort{ 6nL^"3@S!  
e`n ZiM>  
/* (non-Javadoc) /JS_gr@DK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u#Ig!7iUu  
*/ OyO]; Yk  
public void sort(int[] data) { xh2r?K@k>  
quickSort(data,0,data.length-1); 4k225~GQ:C  
} w^0hVrws=,  
private void quickSort(int[] data,int i,int j){ M{L- V  
int pivotIndex=(i+j)/2; 7 FE36Ub9  
file://swap >`AK'K8{M  
SortUtil.swap(data,pivotIndex,j); qx ki  
(F&LN!Hn>p  
int k=partition(data,i-1,j,data[j]); <[[yV  
SortUtil.swap(data,k,j); AIg4u(j  
if((k-i)>1) quickSort(data,i,k-1); t1hQ0B  
if((j-k)>1) quickSort(data,k+1,j); pT|s#-}  
GTR*3,rw  
} 2K9X (th1  
/**  JQQ[jl;  
* @param data pWxk^qhe/  
* @param i #+ch  
* @param j xq((]5Py  
* @return h^ Cm\V  
*/ A`uHZCwJ5  
private int partition(int[] data, int l, int r,int pivot) { _bCAZa&&  
do{ -~]H5er`  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); WAxNQfEe  
SortUtil.swap(data,l,r); dy_Uh)$$|g  
} %C/p+Tg  
while(l SortUtil.swap(data,l,r); -yf8  
return l; ':(AiD-}  
} ],weqs  
8_}t,BC  
} A^,E~Z!x  
MSmr7%g3D  
改进后的快速排序: W/,bz",v3  
vqN/crJ@  
package org.rut.util.algorithm.support; P gA<pfEHE  
[_JdV(]$  
import org.rut.util.algorithm.SortUtil; bJIYe ld  
$rXCNew(  
/** sbmtx/%U  
* @author treeroot =_`q;Tu=  
* @since 2006-2-2 i3 eF_  
* @version 1.0 Q/SO%E`E  
*/ W\~ie}D{  
public class ImprovedQuickSort implements SortUtil.Sort { !An?<Sv$  
CK[8y&  
private static int MAX_STACK_SIZE=4096; }*(_JR4G  
private static int THRESHOLD=10; 8lM=v> Xc  
/* (non-Javadoc) ^y@ W\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iF+:j8 b  
*/ $0 .6No_|  
public void sort(int[] data) { -| FHv+  
int[] stack=new int[MAX_STACK_SIZE]; $Y7VA  
KdkL_GSLT  
int top=-1; C~T ,[U  
int pivot; )vO"S  
int pivotIndex,l,r; |~5cN m  
/O:4u_  
stack[++top]=0; U*~-\jN1pb  
stack[++top]=data.length-1; (e'8>Pv  
1Of(O!  
while(top>0){ `/[5/%  
int j=stack[top--]; trDw|WA  
int i=stack[top--]; w8X5kk   
2L&c91=wE  
pivotIndex=(i+j)/2; LVg#E*J  
pivot=data[pivotIndex]; O4X03fUx  
<<01@Q <  
SortUtil.swap(data,pivotIndex,j); 9HJYrzf{%  
PV#h_X<l%  
file://partition ,^G+<T6  
l=i-1; &j:e<{@  
r=j; /C8}5)  
do{  lPZ>#  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); OpaRQ=  
SortUtil.swap(data,l,r); U^KWRqt  
} ^"7- `<J  
while(l SortUtil.swap(data,l,r); =J1V?x=l@  
SortUtil.swap(data,l,j); W7n^]~V  
tn$TyCzckW  
if((l-i)>THRESHOLD){ ^5s7mls  
stack[++top]=i; 9KX% O-'  
stack[++top]=l-1; [TA.|7&  
} ;-`NT` #2  
if((j-l)>THRESHOLD){ ?'~u)O(n  
stack[++top]=l+1; .T7CMkYt  
stack[++top]=j; >0@w"aKn  
} b\JU%89  
%!t9)pNc  
} bJn&Y  
file://new InsertSort().sort(data); !@lx|= #  
insertSort(data); wKi#5k2  
} L91vp'+2  
/**  jfK&CA  
* @param data SAq .W"ri  
*/ |?J57(  
private void insertSort(int[] data) { 9^DAlY,x.  
int temp; g^ ?G)>  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); _yAY5TIv  
} =iB[sLEJ  
} 0p.MH~mx  
} l| uiC%T  
F)~>4>hPr  
} K 3\a~_0  
&iWTf K7  
归并排序: ! 7V>gWhR  
[5' HlHK  
package org.rut.util.algorithm.support; _w\i~To!  
kttJTP77t  
import org.rut.util.algorithm.SortUtil; (<_kq;XtN0  
WYF8?1dt +  
/** H0&wn#);6R  
* @author treeroot |_ED*ATR=  
* @since 2006-2-2 \},H\kK+^  
* @version 1.0 J>#hu3&UOQ  
*/ {HY3E}YJL  
public class MergeSort implements SortUtil.Sort{ >{ {ds--  
].d%R a:{  
/* (non-Javadoc) @_"cMU!  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w_>\Yd[  
*/ o:v_I{  
public void sort(int[] data) { EGI$=Y  
int[] temp=new int[data.length]; cvy 5|;-u  
mergeSort(data,temp,0,data.length-1); |BM#rfQ  
} h8O\sKn  
C.ynOo,W  
private void mergeSort(int[] data,int[] temp,int l,int r){ 3| w$gG;Y  
int mid=(l+r)/2; - q9m@!L  
if(l==r) return ; =Pn"nkpML  
mergeSort(data,temp,l,mid); HD#>K 7  
mergeSort(data,temp,mid+1,r); 5JaLE5-  
for(int i=l;i<=r;i++){ qJs_ahy(  
temp=data; e.L&A|  
} ~D5FnN9  
int i1=l; } *) l  
int i2=mid+1; %S"z9@  
for(int cur=l;cur<=r;cur++){ uSYI X  
if(i1==mid+1) JE{ cZ<NNH  
data[cur]=temp[i2++]; $X;OK  
else if(i2>r) >{(c\oMD  
data[cur]=temp[i1++]; \i[N ";K  
else if(temp[i1] data[cur]=temp[i1++]; 72RTEGy  
else ,F->*=  
data[cur]=temp[i2++]; 837:;<T  
} kuBtPZ  
} QZ(O2!Mg  
8IL5 :7H8  
} m Qx1co  
J ?aJa  
改进后的归并排序: X} V]3  
b(mZ/2,B  
package org.rut.util.algorithm.support; FTEC=j$ln  
Yur}<>`(  
import org.rut.util.algorithm.SortUtil; 0Y* "RbG  
7>@0nHec  
/** g,*fpk  
* @author treeroot  :Kyr}-  
* @since 2006-2-2 4MDVR/Z7  
* @version 1.0 r9(c<E?,h  
*/ J R~s`>2  
public class ImprovedMergeSort implements SortUtil.Sort { GCQOjqiR  
H/[(T%]o  
private static final int THRESHOLD = 10; ,1|=_M31  
c|m?f  
/* 0 )PZS>  
* (non-Javadoc) hC{2LLu;n  
* HW_2!t_R  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |9 *$6Y  
*/ &{WEtaXaa  
public void sort(int[] data) { bZK`]L[   
int[] temp=new int[data.length]; 4E!Pxjl3a  
mergeSort(data,temp,0,data.length-1);  `m_f i  
} Z$Ps_Ik  
"/^kFsvp  
private void mergeSort(int[] data, int[] temp, int l, int r) { N8r+Q%ov  
int i, j, k; {X pjm6a7  
int mid = (l + r) / 2; R. ryy  
if (l == r) T3)m{gv0`  
return; }EfRYE$E  
if ((mid - l) >= THRESHOLD) },5LrX`L  
mergeSort(data, temp, l, mid); 3\<(!yY8  
else Um/ g&k  
insertSort(data, l, mid - l + 1); |QH )A  
if ((r - mid) > THRESHOLD) \q-["W34  
mergeSort(data, temp, mid + 1, r); )d {8Cu6  
else RKs_k`N0  
insertSort(data, mid + 1, r - mid); -Vg0J6x  
JK XIxw>q  
for (i = l; i <= mid; i++) { h*[sV  
temp = data; OH+2)X  
} Q6X}R,KA1  
for (j = 1; j <= r - mid; j++) { [nsTO5G$u  
temp[r - j + 1] = data[j + mid]; 9fSX=PVRmQ  
} ,n5 [Y)  
int a = temp[l]; =8qhK=&]  
int b = temp[r]; sD XJXJZ  
for (i = l, j = r, k = l; k <= r; k++) { EX3;|z@5;  
if (a < b) { = 6w(9O  
data[k] = temp[i++]; !.{{QwZ  
a = temp; 4~:D7",Jn  
} else { ?=Z0N&}[  
data[k] = temp[j--]; ]7dal [i  
b = temp[j]; xaSiG  
} 8\Z/mU*4  
} %} Ob~m>P  
} @2$iFZq~  
dNs<`2m  
/** BA0.B0+"  
* @param data ^UpwVKdP  
* @param l :}w^-I"  
* @param i }JWk?  
*/ 7\;gd4Ua1  
private void insertSort(int[] data, int start, int len) { nr9c G/"  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pe@/tO&I  
} POUD*(DqNK  
} =:'a)o  
} </d&bS  
} lhV'Q]s@6  
}NJ? .Y  
堆排序: d5B96;3  
bPdbKi{j@  
package org.rut.util.algorithm.support; _\xd]~ELj  
uO`YA]  
import org.rut.util.algorithm.SortUtil; S)\%.~ n  
4mzWNr>fb  
/** 'roZ:NE  
* @author treeroot wq&TU'O  
* @since 2006-2-2 lN^} qg><  
* @version 1.0 |LDo<pE*V4  
*/ KI Ua  
public class HeapSort implements SortUtil.Sort{ 2L_ts=  
H0B"?81  
/* (non-Javadoc) rj].bGQ,+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `#~HCl  
*/ O8:,XTAN  
public void sort(int[] data) { GzUgzj|BN~  
MaxHeap h=new MaxHeap(); fOyLBixR  
h.init(data); bP 2IX  
for(int i=0;i h.remove(); :xT=uE.I  
System.arraycopy(h.queue,1,data,0,data.length); J5Tl62}  
} WNPdym  
NN W*  
private static class MaxHeap{ <4Jo1  
q|%(47}z  
void init(int[] data){ AcYL3  
this.queue=new int[data.length+1]; [Hww3+~+  
for(int i=0;i queue[++size]=data; |3MqAvPJ  
fixUp(size); Ot]PH[+  
} `_'I 9,.a  
} oY{r83h{  
bg)yl iX  
private int size=0; vxo iPqo  
*qE[Y0Cd  
private int[] queue; )nS;]7pB@  
,g$N  
public int get() { :R<n{%~  
return queue[1]; -_ [Z5%B  
} dt  4_x1  
#IP<4"Hf  
public void remove() { mYN|)QVKy  
SortUtil.swap(queue,1,size--); @fbB3  
fixDown(1); c]W]m`:  
} *"Ipu"G5?  
file://fixdown t\]CdH`+  
private void fixDown(int k) { lV^sVN Z]  
int j; c;ELAns>  
while ((j = k << 1) <= size) { Kl$!_$  
if (j < size %26amp;%26amp; queue[j] j++; g/4.^c  
if (queue[k]>queue[j]) file://不用交换 R/iw#.Yy  
break; u[^(s_  
SortUtil.swap(queue,j,k); 0@t/j<5o  
k = j; W]n%$a  
} gRKmfJ*u  
} UPPDs"  
private void fixUp(int k) { LeY\{w  
while (k > 1) { oG5JJpLT  
int j = k >> 1; ){")RrD(  
if (queue[j]>queue[k]) l9q ygh  
break; 1z$;>+g<  
SortUtil.swap(queue,j,k); -rlxxLT+  
k = j; yU*j{>%RsK  
} s0.yPA  
} /z,sM"d  
#Qy*zU#9  
} N Q{ X IN~  
X1i6CEa<  
} h&5H`CR[  
ID5?x8o#k  
SortUtil: 7Z"mVh}  
wI}5[m  
package org.rut.util.algorithm; q=}Lm;r  
~|pVz/s|G  
import org.rut.util.algorithm.support.BubbleSort; yI bz\3  
import org.rut.util.algorithm.support.HeapSort; EH]5ZZ[Z  
import org.rut.util.algorithm.support.ImprovedMergeSort; ^Y ~ ,s  
import org.rut.util.algorithm.support.ImprovedQuickSort; FcsEv {#U  
import org.rut.util.algorithm.support.InsertSort; Hv<%_t_/  
import org.rut.util.algorithm.support.MergeSort; JHc|.2Oe  
import org.rut.util.algorithm.support.QuickSort; ,ibI@8;#~'  
import org.rut.util.algorithm.support.SelectionSort; yK0Q,   
import org.rut.util.algorithm.support.ShellSort; 0;3;Rs  
91%+Bf()J6  
/** 0:h;ots'  
* @author treeroot -^$CGRE6A  
* @since 2006-2-2 $ZXy&?4  
* @version 1.0 @"kA&=0;|J  
*/ JXGIVH?Rpu  
public class SortUtil { )Bl% {C  
public final static int INSERT = 1; HQaKG4Z  
public final static int BUBBLE = 2; ,ye>D='  
public final static int SELECTION = 3; =1^Ru*G  
public final static int SHELL = 4; @o44b!i  
public final static int QUICK = 5; Nt&}T  
public final static int IMPROVED_QUICK = 6; FI*.2rdSR  
public final static int MERGE = 7; Z,,Da|edH  
public final static int IMPROVED_MERGE = 8; u$&7fmZ  
public final static int HEAP = 9; f&ZxG,]H i  
8S@ ~^D  
public static void sort(int[] data) { A! <R?  
sort(data, IMPROVED_QUICK); eOD;@4lR  
} _xAdvr' W  
private static String[] name={ ^gH.5L0]gH  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M$%aX,nk'  
}; .-`7Av+7  
{;Mcor3  
private static Sort[] impl=new Sort[]{ zEF3B  
new InsertSort(), =d7lrx+z  
new BubbleSort(), {NKDmeg:D  
new SelectionSort(), =NF},j"  
new ShellSort(), !F;W#Gc  
new QuickSort(), ]![ewO@  
new ImprovedQuickSort(), f&8&UL>e`  
new MergeSort(), e@Z(z^V  
new ImprovedMergeSort(), sTeL4g|%{  
new HeapSort() `8xe2=Ub  
}; \KLWOj%  
= Yh>5A  
public static String toString(int algorithm){ *FK!^Y  
return name[algorithm-1]; Qgo0uu M  
} /r[0Dw  
/Kwo^Q{  
public static void sort(int[] data, int algorithm) { <|hvH  
impl[algorithm-1].sort(data); O#Xq0o  
} +To{Tm-  
&Zd{ElM  
public static interface Sort { hP`3Ao  
public void sort(int[] data); K$ #(\-M  
} h+,zfVJu  
2!7wGXm~U  
public static void swap(int[] data, int i, int j) { ]#j]yGV  
int temp = data; Gow_a'  
data = data[j]; IA$:r@QNx8  
data[j] = temp; =6ZZ/+6b  
} rm+|xvZ4  
} EtcAU}9  
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