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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。 I._ A  
插入排序: D,=~7/g  
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package org.rut.util.algorithm.support; / ^)3V}  
*Z"cXg^ti  
import org.rut.util.algorithm.SortUtil; 274j7Y'  
/** =ttD5 p  
* @author treeroot Re~6 '  
* @since 2006-2-2 dlvU=^G#G  
* @version 1.0 nY MtK  
*/ ]a.e;c-  
public class InsertSort implements SortUtil.Sort{ F~=kMQO  
D)G oWt  
/* (non-Javadoc) GTB\95j]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,l AZ4  
*/  gwIR3u  
public void sort(int[] data) { V(kK2az  
int temp; N^B7<~ bD  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ;S^"Y:7)  
} $G <r2lPy  
} [<i3l'V/[  
} 5 `TMqrk  
N'{Yhx u  
} ~I N g9|  
>]_6|Wfl  
冒泡排序: ,L  
l'<&H#A;'  
package org.rut.util.algorithm.support; 7}qxWz  
|}^u<S8X  
import org.rut.util.algorithm.SortUtil; W0x9^'=s\  
*# <%04f  
/** \ P6 !  
* @author treeroot [3=Y 9P:  
* @since 2006-2-2 , l!>+@  
* @version 1.0 IJ+}  
*/ 9Znc|<  
public class BubbleSort implements SortUtil.Sort{ b`%u}^B {  
vy2<'V*y}  
/* (non-Javadoc) \6GNKeN  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V %[t'uh  
*/ {_W8Qm`.  
public void sort(int[] data) { U}HSL5v  
int temp; /Q9Cvj)"  
for(int i=0;i for(int j=data.length-1;j>i;j--){ q8ZxeMqx%  
if(data[j] SortUtil.swap(data,j,j-1); _=x*yDPG}  
} 851BOkRal4  
} q/w5Dx|:  
} tHaHBx1P  
} bkR~>F]FAu  
X)(K|[  
} QpzdlB44l  
?$)a[UnqX  
选择排序: <9H3d7%  
Q7pCF,;  
package org.rut.util.algorithm.support; Otr=+i ZI  
:?EZ\WM7  
import org.rut.util.algorithm.SortUtil; Lm!]m\LRZD  
C!547(l[  
/** 29 !QE>Q  
* @author treeroot $C=XSuPNK  
* @since 2006-2-2 c{`!$Z'k<  
* @version 1.0 lNc0znY  
*/ PC"=B[OlJ  
public class SelectionSort implements SortUtil.Sort { = ZoNkj/^,  
D$KP>G  
/* )M.g<[= ^  
* (non-Javadoc) q%bFR[p<*  
* `B&E?x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  [A,!3BN  
*/ HQF@@  
public void sort(int[] data) { fb0)("_V  
int temp; %qJgtu"8  
for (int i = 0; i < data.length; i++) { Qu/f>tJN;  
int lowIndex = i; r9-ayp#pC  
for (int j = data.length - 1; j > i; j--) {  0zr%8Q(Q  
if (data[j] < data[lowIndex]) { 8T+o.w==  
lowIndex = j; AzzHpfv,  
} dj5|t~&  
} L\#G#1x8  
SortUtil.swap(data,i,lowIndex); u1kCvi#N  
} *Q2 oc:6  
} |$\1E+  
?$I9/r  
} 4TQmEM,  
Dg~m}La  
Shell排序: Q<szH1-  
AD!w:jT9  
package org.rut.util.algorithm.support; f"\klfrRI_  
#v$wjqK5  
import org.rut.util.algorithm.SortUtil; DHjfd+E=s  
ORqqzy +  
/** ( !m6>m2  
* @author treeroot <  j  
* @since 2006-2-2 g<DXJ7o  
* @version 1.0 v:!TqfI  
*/ 3GL?&(eU;  
public class ShellSort implements SortUtil.Sort{ Y$, ++wx  
k!z.6di  
/* (non-Javadoc) 7r3CO<fb  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *\+oe+3  
*/ P1L+Vnfu  
public void sort(int[] data) { #CJ ET  
for(int i=data.length/2;i>2;i/=2){ w|I5x}ZFG  
for(int j=0;j insertSort(data,j,i); >sAaLR4  
} 1H%p|'FKA  
} 1bz^$2/k  
insertSort(data,0,1); 55`p~:&VQ  
} O,+9r_Gh  
o3GZcH?  
/** }"RVUYU  
* @param data 4a!%eBhX"K  
* @param j SH"<f_  
* @param i st.{AEv@  
*/ (-;(wCEE  
private void insertSort(int[] data, int start, int inc) { L>Ze*dt  
int temp; 6o]{< T/'  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ',|OoxhbK  
} M a{@b$>  
} 7F2:'3SQ  
} -d2)  
7Kj7or|  
} %WP[V{,F  
C\Ob!sv%H  
快速排序: )_Hv9!U]e  
fMHw=wJQ  
package org.rut.util.algorithm.support; HdY#cVxy  
!z :j-gT3  
import org.rut.util.algorithm.SortUtil; 0%|)=T3Slu  
_h,X3P   
/** #5^OO ou|  
* @author treeroot fQ.S ,lMe  
* @since 2006-2-2 &eO.h%@  
* @version 1.0 +|<bb8%  
*/ -)&lsFF  
public class QuickSort implements SortUtil.Sort{ G&Yo2aADR  
} nIYNeP?D  
/* (non-Javadoc) L*p7|rq$"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I"8Z'<|/\q  
*/ ~rq:I<5  
public void sort(int[] data) { Xmb##:  
quickSort(data,0,data.length-1); e<8KZ  
} W?N+7_%'  
private void quickSort(int[] data,int i,int j){ _TJk Yz$  
int pivotIndex=(i+j)/2; +?QHSIQo  
file://swap VgY6M_V  
SortUtil.swap(data,pivotIndex,j); q)@;8Z=_c  
<Vh5`-J  
int k=partition(data,i-1,j,data[j]); <Nloh+n=  
SortUtil.swap(data,k,j); vy7?]}MvV  
if((k-i)>1) quickSort(data,i,k-1); 1 K^-tms  
if((j-k)>1) quickSort(data,k+1,j); {65Y Tt%  
G7GKO  
} ZOppec1D  
/** eH*i_g'  
* @param data 3qV~C{ S  
* @param i "WPWMQ+  
* @param j cdI"=B+C\  
* @return c>r~pY~$  
*/ !6#.%"{-  
private int partition(int[] data, int l, int r,int pivot) { 1?"Zrd  
do{ gtY7N>e  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ?}uvpB1}  
SortUtil.swap(data,l,r); \|4F?Y  
} p2O[r  
while(l SortUtil.swap(data,l,r); 1b7?6CqV  
return l; P=E10  
} TL -AL tG  
KZ=5"a  
} V.+a}J=Cw  
Fy>g*3  
改进后的快速排序: E3x<o<v  
:a=]<_*x  
package org.rut.util.algorithm.support; Ir- 1@_1Q  
sP9{tk2K  
import org.rut.util.algorithm.SortUtil; .7Pp'-hK  
DU5rB\!.~  
/** Y{t}sO%A  
* @author treeroot _?$')P|  
* @since 2006-2-2 z,!A4ws  
* @version 1.0 G!D~*B9 G  
*/ ]r#NjP  
public class ImprovedQuickSort implements SortUtil.Sort { 96gaun J  
xo-{N[r  
private static int MAX_STACK_SIZE=4096; ]N1,"W}  
private static int THRESHOLD=10; hbx+*KM  
/* (non-Javadoc) B>"-8#B[4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :^x,>( a  
*/ K)\D,5X^  
public void sort(int[] data) { d(5j#?  
int[] stack=new int[MAX_STACK_SIZE]; p-z!i+  
(f* r  
int top=-1; Vrp]YR L`  
int pivot; 7 lq$PsC  
int pivotIndex,l,r; J|z' <W  
x;4m@)Mu  
stack[++top]=0; XNBzA3W  
stack[++top]=data.length-1; V Kc`mE  
O=u.J8S2  
while(top>0){ :19s=0  
int j=stack[top--]; {D]I[7f8Ev  
int i=stack[top--]; N B8Yn\{B  
u)D!RhV&  
pivotIndex=(i+j)/2; 7i=ER*F~  
pivot=data[pivotIndex]; 'Rv.6>xqc  
B\dhw@hM  
SortUtil.swap(data,pivotIndex,j); L'"od;(6R  
0U2dNLc  
file://partition mm | *  
l=i-1; ])zpx-  
r=j; ]go.IfH  
do{ nF 'U*  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); :mdoGb$ dr  
SortUtil.swap(data,l,r); V* ,u;*  
} b#S-u }1PE  
while(l SortUtil.swap(data,l,r); YIl,8! z~  
SortUtil.swap(data,l,j); &';@CeK  
Ds8x9v)^  
if((l-i)>THRESHOLD){ %VrMlG4hx  
stack[++top]=i; 2T"[$iH!7  
stack[++top]=l-1; XpT})AV  
} a7]Z_Gk  
if((j-l)>THRESHOLD){ hg `N`O  
stack[++top]=l+1; kPnuU!  
stack[++top]=j; ]/mRMm9"3h  
} Yp $@i20  
w#sP5qKv8  
} S~y.>X3"P  
file://new InsertSort().sort(data); z+?48 }  
insertSort(data); i_$?sg#=yk  
} 2bpFQ8q  
/** uVw|jj  
* @param data S.owVMQ  
*/ <FvljKuq+  
private void insertSort(int[] data) { 0B5d$0  
int temp; ]mi)x6 3^  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ^;EwZwH[  
} O(T6Y80pU  
} G?+]BIiL  
} mldY/;-H!1  
(`f)Tt=`  
} ! j0iLYo(*  
\=@4F^U7`  
归并排序: W jBtL52  
w< |Lx#L}  
package org.rut.util.algorithm.support; *jy"g64j  
j)jt&Gg'  
import org.rut.util.algorithm.SortUtil; x=Ez hq]X  
K$ |!IXs  
/** ~A>-tn}O  
* @author treeroot /5:qS\Zl  
* @since 2006-2-2 pf_`{2.\uO  
* @version 1.0 \j vS`+  
*/ i]zTY\gw8M  
public class MergeSort implements SortUtil.Sort{ uU8L93  
 p;vrPS  
/* (non-Javadoc) c=IjR3F  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) liH1r1M  
*/ p/jAr+XM  
public void sort(int[] data) { ^aL> /'Y#|  
int[] temp=new int[data.length]; 95-%>?4  
mergeSort(data,temp,0,data.length-1); /.m}y$@GV  
} `Jl_'P}  
StMvz~  
private void mergeSort(int[] data,int[] temp,int l,int r){ )B Xl|V,  
int mid=(l+r)/2; 5R#:ALwX:  
if(l==r) return ; Q".p5(<  
mergeSort(data,temp,l,mid); lp]q%P  
mergeSort(data,temp,mid+1,r); 4"V6k4i5  
for(int i=l;i<=r;i++){ R!_1*H$  
temp=data; 1++Fs  
} z%/<|`  7  
int i1=l; <Ow+LJWQK  
int i2=mid+1; h &IF ?h  
for(int cur=l;cur<=r;cur++){ 9!vimu)  
if(i1==mid+1) k%({< ul  
data[cur]=temp[i2++]; G4,BcCPQ  
else if(i2>r) -k@Uo(MB  
data[cur]=temp[i1++]; ch0x*[N@  
else if(temp[i1] data[cur]=temp[i1++]; H~ =;yy  
else 4' <y  
data[cur]=temp[i2++]; C3 (PI,,  
} RS  Vt  
} s Qa9M  
)Z@hk]@?_[  
} fH;lh-   
Oat #%  
改进后的归并排序: D?9EO=  
jD_B&MQz  
package org.rut.util.algorithm.support; M cbiO)@I  
;+VHi%5Z  
import org.rut.util.algorithm.SortUtil; VN<baK%]  
hKFB=U  
/** m\J" P'=  
* @author treeroot q&EwD(k  
* @since 2006-2-2 N+ei)-  
* @version 1.0 HlX2:\\  
*/ ]"\XTL0  
public class ImprovedMergeSort implements SortUtil.Sort { 7o`pNcabtz  
H?dEgubg7]  
private static final int THRESHOLD = 10; o(Ro/U(Wu  
O9MBQNwjA  
/* z%WOv ~8~  
* (non-Javadoc) ]hA]o7 k  
*  B*Q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C= PV-Ul+  
*/ +Ram%"Zwh  
public void sort(int[] data) { /Oa.@53tK6  
int[] temp=new int[data.length]; '5SO3/{b  
mergeSort(data,temp,0,data.length-1); %Z#[{yuFs  
} Ya,(J0l  
vTYgWR,h  
private void mergeSort(int[] data, int[] temp, int l, int r) { }{ "RgT-qG  
int i, j, k; \E2S/1p  
int mid = (l + r) / 2; h>jp.%oOu  
if (l == r) 3x~AaC.j  
return; 15`,kJSK  
if ((mid - l) >= THRESHOLD) }zV#?;}  
mergeSort(data, temp, l, mid); 3})0p  
else .[X"+i\  
insertSort(data, l, mid - l + 1); 3O'X;s2\d  
if ((r - mid) > THRESHOLD) U7Pn $l2!  
mergeSort(data, temp, mid + 1, r); 8*yk y  
else tsqWnz=)  
insertSort(data, mid + 1, r - mid); R{Qvpd$y  
ogKd}qTov  
for (i = l; i <= mid; i++) {  ,zrShliU  
temp = data; KXga {]G:  
} =?- s azF&  
for (j = 1; j <= r - mid; j++) { jT q@@y  
temp[r - j + 1] = data[j + mid]; Q##L|*Qy  
} JB\BP$ap  
int a = temp[l]; &5;y&dh  
int b = temp[r]; ( 0Z3Ksfj1  
for (i = l, j = r, k = l; k <= r; k++) { G@]|/kN1y  
if (a < b) { z`+j]NX]  
data[k] = temp[i++]; Y@M l}43  
a = temp; {:d9q  
} else { 4xNzhnp|  
data[k] = temp[j--]; O\qY? )  
b = temp[j]; <\5Y~!)  
} \%:]o-+"I  
} t>>\U X  
} +S>}<OE  
yzmwNsu  
/** wPU<jAQyp  
* @param data <S%kwS  
* @param l @IwVR  
* @param i QG=&{-I~[3  
*/ ; +E@h=?  
private void insertSort(int[] data, int start, int len) { U?Icyn3q0  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HFd>UdT%  
} vxC,8Z  
} auT$-Ki8  
} i#y3QCNqf^  
} Lg4I6 G  
z;En Ay{9  
堆排序: *]_GFixi  
4FgY!k  
package org.rut.util.algorithm.support; `m Tc  
r=ds'n"  
import org.rut.util.algorithm.SortUtil; w~(x*R}  
VpMPTEZ*L  
/** b/Z 0{38  
* @author treeroot #ZRplA~C7]  
* @since 2006-2-2 ?*8HZ1m#  
* @version 1.0 5Pl~du  
*/ O6pL )6d  
public class HeapSort implements SortUtil.Sort{ nob^ I5?  
F DCHB~D  
/* (non-Javadoc) c;e2= A  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bswd20(w  
*/ J]|lCwF  
public void sort(int[] data) { \dag~b<  
MaxHeap h=new MaxHeap(); <\cH9D`dE  
h.init(data); Z"fnjH  
for(int i=0;i h.remove(); 2x*C1   
System.arraycopy(h.queue,1,data,0,data.length); 2 <@27 C5  
} s GP}>w-JZ  
1y5$  
private static class MaxHeap{ Soa5TM  
/M "E5  
void init(int[] data){ '{:Yg3K  
this.queue=new int[data.length+1]; MrA&xM  
for(int i=0;i queue[++size]=data; !*gTC1bvB  
fixUp(size); e r;3TG~  
} h}U\2$5  
} xBC:%kG~#  
IlcFW  
private int size=0; 5Y&s+|   
txwTJScg  
private int[] queue; ZSTpA,+6  
~xg1mS9d  
public int get() { +$+'|w  
return queue[1]; Y(]&j`%  
} ,1YnWy *  
#)BdN  
public void remove() { L_rKVoKjt  
SortUtil.swap(queue,1,size--); a,U =irBA  
fixDown(1); %8V/QimHU  
} Pl }dA  
file://fixdown 7^~pOFdH  
private void fixDown(int k) { -vfV;+3  
int j; {-]/r  
while ((j = k << 1) <= size) { f9FsZD  
if (j < size %26amp;%26amp; queue[j] j++; hsQrHs'k  
if (queue[k]>queue[j]) file://不用交换 ?eb2T`\0Q  
break; [-sE:O`yt  
SortUtil.swap(queue,j,k); [N/[7Q/y  
k = j; u= K?K  
} snBC +`-  
} I^{PnrB  
private void fixUp(int k) { p5~;8Q7  
while (k > 1) { swVq%]')"  
int j = k >> 1; 96Tc:#9i  
if (queue[j]>queue[k]) Dc[Qu? ]LM  
break; mdOF0b%-]  
SortUtil.swap(queue,j,k); e.0vh?{\  
k = j; B*owV%  
} y\Z-x  
} 8fdK|l w  
F~ n}Ep~1  
} }q(IKH\&  
AX%9k  
} :!1B6Mc  
e3wFi,/@  
SortUtil: 5CkM0G`  
J|Lk::Ri  
package org.rut.util.algorithm; id.o )=  
L$`!~z 1  
import org.rut.util.algorithm.support.BubbleSort; A]{8 =  
import org.rut.util.algorithm.support.HeapSort; @Ey(0BxNu  
import org.rut.util.algorithm.support.ImprovedMergeSort; MWCP/~>a2  
import org.rut.util.algorithm.support.ImprovedQuickSort; C<6IiF[>%  
import org.rut.util.algorithm.support.InsertSort; 3Nh;^  
import org.rut.util.algorithm.support.MergeSort; 0rT-8iJp4P  
import org.rut.util.algorithm.support.QuickSort; flLC\   
import org.rut.util.algorithm.support.SelectionSort; ,7pO-:*g  
import org.rut.util.algorithm.support.ShellSort; ~ S R:,R  
XQk9 U  
/** 0X)'8N  
* @author treeroot %+G/oF |  
* @since 2006-2-2 hSD)|  
* @version 1.0 r! 5C3  
*/ CD^_>sya  
public class SortUtil { _SC>EP8:Z  
public final static int INSERT = 1; Ah &D5,3  
public final static int BUBBLE = 2; QH4nb h4  
public final static int SELECTION = 3; )E^4\3 ^:  
public final static int SHELL = 4; Ckvm3r\i2  
public final static int QUICK = 5; mB#`{|1[  
public final static int IMPROVED_QUICK = 6; $xS `i-|  
public final static int MERGE = 7; Vd|5JA}<"  
public final static int IMPROVED_MERGE = 8; X63DBF4A  
public final static int HEAP = 9; >U9!KB  
LIVVb"V|,  
public static void sort(int[] data) { /PIU@$DV  
sort(data, IMPROVED_QUICK); A"C%.InZ  
} :f^O!^N  
private static String[] name={ '&3Sl?E  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B\}E v&  
}; 9\Mesf1$o  
FQ?H%UcW  
private static Sort[] impl=new Sort[]{ xN}P0  
new InsertSort(), [(`T*c.#.X  
new BubbleSort(), d?&?$qf[  
new SelectionSort(), q!<`ci,uS  
new ShellSort(), R6)p4#|i  
new QuickSort(), $RKd@5XP  
new ImprovedQuickSort(), &tQ,2RT  
new MergeSort(), 'mug,jM  
new ImprovedMergeSort(), ,I@4)RSAH|  
new HeapSort() "^<:7_Y  
}; .Kq>/6  
(XRj##G{  
public static String toString(int algorithm){ T |'Ur #  
return name[algorithm-1]; vUgLWd  
} {TdK S  
6yTL7@V|B  
public static void sort(int[] data, int algorithm) { CQ"IL;y  
impl[algorithm-1].sort(data); GwwxSB&y  
} R8\y|p#c  
_e8@y{/~Fd  
public static interface Sort { ?Yg K]IxD  
public void sort(int[] data); 4\2p8__  
} \Ul*Nsw  
akBR"y:~:H  
public static void swap(int[] data, int i, int j) { eJ%~6c`@!  
int temp = data; r em&F'x0V  
data = data[j]; *u7C){)gr[  
data[j] = temp; p0$K.f| ^  
} v<tH 3I+   
} \9i.dF  
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