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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。 AU\xNF3  
插入排序: *CH!<VB/  
qP;{3FSkAF  
package org.rut.util.algorithm.support; o0aO0Y  
K#l  -?  
import org.rut.util.algorithm.SortUtil; 5DkK'tCI9Z  
/** )4!CR/ao  
* @author treeroot zL)1^[%O9  
* @since 2006-2-2 lTV@b&  
* @version 1.0 Iuu<2#gb8"  
*/ 4T==A#Z  
public class InsertSort implements SortUtil.Sort{ uG=t?C6  
sd]54&3A  
/* (non-Javadoc) 3 ^02fy  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &?/N}g@K  
*/ +QIGR'3u  
public void sort(int[] data) { ,#E3,bu6_4  
int temp; :$M9XZ~\  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); V6@*\+:3)  
} L9{mYA]q  
} ;L G %s  
} p|h.@do4   
`P^u:  
} &547`*  
o%V @D'w  
冒泡排序: [!J @a  
0a2$P+p  
package org.rut.util.algorithm.support; 7m|`tjQ1  
F@=e2e 4  
import org.rut.util.algorithm.SortUtil; }[>RxHd  
io9y; S"+  
/** l~]hGLviJE  
* @author treeroot 6\,DnO   
* @since 2006-2-2 6[+\CS7Lt  
* @version 1.0 <CZI7]PM7  
*/ 5T$}Oy1  
public class BubbleSort implements SortUtil.Sort{ saGRP}7?  
-TzI>Fz  
/* (non-Javadoc) hsTFAfa'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )myf)"l5  
*/ l-<3{!  
public void sort(int[] data) { 22)0zY%\  
int temp; D'7A2f  
for(int i=0;i for(int j=data.length-1;j>i;j--){ qhV,u;\.  
if(data[j] SortUtil.swap(data,j,j-1); :`+|'*b(A  
} Smq r q  
} 6Gs{nFw  
} ]regi- LGU  
} DAjG *K{  
Rro?q  
} h]kn%?fpmB  
_7Xd|\Zc  
选择排序: z $9@j2  
t[]['Iosd  
package org.rut.util.algorithm.support; "%{,T  
Tg"' pO  
import org.rut.util.algorithm.SortUtil; ZhhI@_sz  
zW%>"y  
/** 5~@?>)TBv  
* @author treeroot %/UV_@x&  
* @since 2006-2-2 [3t0M5x w  
* @version 1.0 Dh hG$  
*/ '8s>rH5[V  
public class SelectionSort implements SortUtil.Sort { 0zg2g!lh  
XMt u"K  
/* jMN)?6$=  
* (non-Javadoc) u|(Ux~O  
* lq:]`l,6@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sp 7u_Pq{  
*/ /Jh1rck  
public void sort(int[] data) { $T"h";M)s  
int temp; S:/{  
for (int i = 0; i < data.length; i++) { 7n\ThfH{  
int lowIndex = i; tl DY k  
for (int j = data.length - 1; j > i; j--) { 6yE'/VB<  
if (data[j] < data[lowIndex]) { ;$vLq&(}  
lowIndex = j; tRLE,(S,-  
} xU@1!%l@  
} S-isL4D.Z  
SortUtil.swap(data,i,lowIndex); gzVtxDh  
} 6D/uo$1Y  
} 1)$%Jr  
By2s']bw  
} 7sXy`+TZ->  
i~9?:plS  
Shell排序: }P#Vsqe V  
K@q&HV"'.  
package org.rut.util.algorithm.support; qOW#Q:T  
bsB},pc  
import org.rut.util.algorithm.SortUtil; _~tm7o+js  
fZ[kh{|  
/** y&1%1 #8F  
* @author treeroot i][f#e4  
* @since 2006-2-2 F 4GP7]  
* @version 1.0 Dt W*n1Bt  
*/ 8jRs =I  
public class ShellSort implements SortUtil.Sort{ /r276Q  
XAkK:}h  
/* (non-Javadoc) E[S? b=^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Iha[G u  
*/ F;#zN  
public void sort(int[] data) { haCKv   
for(int i=data.length/2;i>2;i/=2){ cI2Fpf`2Wj  
for(int j=0;j insertSort(data,j,i); ovo/!YJ2  
} 5QAdcEcN@O  
} 0Y7$d`  
insertSort(data,0,1); 5B1G?`]?  
} NeHx2m+  
>L8?=>>?\  
/** os[ZIHph  
* @param data {{32jU7<  
* @param j uM<|@`&b  
* @param i O#vn)+Y,*  
*/ VKy5=2&  
private void insertSort(int[] data, int start, int inc) { Gu5~ DyT`G  
int temp; }7.#Dj/r6  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); C)OG62  
} eI^gV'UK  
} 0mTEim  
} ?{eY\I  
F$i$a b  
} )u0O_R  
\SOeTn+  
快速排序: <|a=hHPi:  
P'sfi>A  
package org.rut.util.algorithm.support; s D_G)c  
E4r.ky`#~  
import org.rut.util.algorithm.SortUtil; I FsE!oDs4  
ur6e&bTp  
/** #,&8&  
* @author treeroot ]BfS270  
* @since 2006-2-2 -^Xy%  
* @version 1.0 -j&Vtr  
*/ .Rvf/-e  
public class QuickSort implements SortUtil.Sort{ 8.yCA  
c_#*mA"+  
/* (non-Javadoc) 1fY>>*oP  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ><=rIhG%H@  
*/ JdiP>KXV  
public void sort(int[] data) { Yrxk Kw#  
quickSort(data,0,data.length-1); ZYa\"zp-  
} G=|70pxU  
private void quickSort(int[] data,int i,int j){ b,Ke>.m  
int pivotIndex=(i+j)/2; Nt~x&s  
file://swap  MGQ,\55"  
SortUtil.swap(data,pivotIndex,j); Umz05*  
y@3Q;~l,  
int k=partition(data,i-1,j,data[j]); L6+C]t}>6  
SortUtil.swap(data,k,j); 9/@ &*  
if((k-i)>1) quickSort(data,i,k-1); C',6%6P  
if((j-k)>1) quickSort(data,k+1,j); [/cIUQ  
0Gsu  
} i6Qb[\;  
/** (9]6bd  
* @param data zT7"VbP  
* @param i P$ucL~r  
* @param j O#EqG.L5  
* @return  <B )   
*/ :3^dF}>  
private int partition(int[] data, int l, int r,int pivot) { fagM7)x  
do{ #Ao !>qCE  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); DtI$9`~  
SortUtil.swap(data,l,r); `*aBRwvK~  
} Lc]1$  
while(l SortUtil.swap(data,l,r); U; U08/y  
return l; g*y/j]  
} O9^T3~x[V  
"Zcu[2,  
} HTk\723Rdw  
|9IC/C!HC  
改进后的快速排序:  )3%@9  
T@P!L  
package org.rut.util.algorithm.support; N*_"8LIfi_  
vk'rA{x  
import org.rut.util.algorithm.SortUtil; 8eJE>g1J  
Y5Z!og  
/** #!})3_Qc(y  
* @author treeroot 9i=B  
* @since 2006-2-2 DnFjEP^  
* @version 1.0 XA{F:%  
*/ ` 1+%}}!$u  
public class ImprovedQuickSort implements SortUtil.Sort { VRbQdiZ{  
~}Z'0W)Q`z  
private static int MAX_STACK_SIZE=4096; %(<(Y  
private static int THRESHOLD=10; TQc@lR!  
/* (non-Javadoc) xS8,W  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M'2r@NR8  
*/ g)R1ObpZ  
public void sort(int[] data) { pOA!#Aj)  
int[] stack=new int[MAX_STACK_SIZE]; BpH%STEN  
,Dp0fauJ  
int top=-1; !9]d |8!  
int pivot; q]FBl}nwl%  
int pivotIndex,l,r; 9S>g6}[E#0  
=6\LIbO  
stack[++top]=0; OJ1tV% E  
stack[++top]=data.length-1; UpfZi9v?W  
g_aCHEFBv  
while(top>0){ x[X`a  
int j=stack[top--]; $a(`ve|  
int i=stack[top--]; 1~\M!SQ)  
>c~RI7uu  
pivotIndex=(i+j)/2; m`}{V5;  
pivot=data[pivotIndex]; IQnIaZ  
U~H?4Izl=  
SortUtil.swap(data,pivotIndex,j); @i LIU}+  
+,5-qm)Gh>  
file://partition % frfSGf.#  
l=i-1; HB iBv-=,  
r=j; ho.(v;  
do{ ~L{l+jK$p  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); VkZ.6kV  
SortUtil.swap(data,l,r); 5 1dSFr<#  
} pC(sS0J  
while(l SortUtil.swap(data,l,r); jfp z`zE  
SortUtil.swap(data,l,j); .=c<>/ 0  
Vn|1v4U!  
if((l-i)>THRESHOLD){ ~h)&&' a  
stack[++top]=i; lV6dm=k  
stack[++top]=l-1; PsnGXcj  
} ke%pZ 7{u  
if((j-l)>THRESHOLD){ BKIjNV3  
stack[++top]=l+1; Riry_   
stack[++top]=j; lzhqcL"  
} vmX"+sHz$]  
Hd &{d+B  
} C6  "  
file://new InsertSort().sort(data); qCPmbg  
insertSort(data); %d;ezY'2  
} M 2q"dz   
/** %,UPJn  
* @param data BRv x[u  
*/ T .n4TmF  
private void insertSort(int[] data) { |E3X  
int temp; ynwG\V  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); /*rhtrS)  
} QHlU|dR)Ry  
} 09h.1/  
} _[h8P9YI4  
~Z)/RT/  
} GTl xq%?b  
!{%&=tIZ  
归并排序: !3 qVB  
OW@\./nM  
package org.rut.util.algorithm.support; '0Q,  
PXk?aJ  
import org.rut.util.algorithm.SortUtil; !L24+$  
,"2TArC'z  
/** 7cTk@Gq  
* @author treeroot R 9 4^4I  
* @since 2006-2-2 I)SG wt-  
* @version 1.0 z(13~38+  
*/ wvby?MhPY  
public class MergeSort implements SortUtil.Sort{ K8I$]M   
6'-As= iw  
/* (non-Javadoc) 1iBP,:>*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jZ*WN|FK?  
*/ rS8 w\`_  
public void sort(int[] data) { ~O6\6$3b5E  
int[] temp=new int[data.length]; $E!J:Y=  
mergeSort(data,temp,0,data.length-1); j\&pej  
} ~d >W?A  
v& $k9)]  
private void mergeSort(int[] data,int[] temp,int l,int r){ * ?Jz2[B  
int mid=(l+r)/2; r@G#[.*A>  
if(l==r) return ; CH#k(sy  
mergeSort(data,temp,l,mid); f 2YLk  
mergeSort(data,temp,mid+1,r); ;2xO`[#  
for(int i=l;i<=r;i++){ c1XX~8  
temp=data; Af(WV>'  
} 5*-3? <)e  
int i1=l; <wd]D@l7r  
int i2=mid+1; +9;2xya2  
for(int cur=l;cur<=r;cur++){ fS&6  
if(i1==mid+1) sW@krBxMv  
data[cur]=temp[i2++]; 6<76H  
else if(i2>r) T^.Cc--c  
data[cur]=temp[i1++]; aM3gRp51cj  
else if(temp[i1] data[cur]=temp[i1++]; Wr?'$:  
else 7:E!b=o#  
data[cur]=temp[i2++]; E%N2k|%8d_  
} zZ-\a[F  
} o4y']JSN  
~FU@wV^   
} eD?3"!c!  
j]rz] k  
改进后的归并排序: /0MDISQy9  
*# {z3{+  
package org.rut.util.algorithm.support; ?Bi*1V<R  
z(y*hazK  
import org.rut.util.algorithm.SortUtil; "tk-w{>  
"Zv~QwC  
/** }f}}A=  
* @author treeroot %kshQ%P)?  
* @since 2006-2-2 ~a9W3b4j  
* @version 1.0 T1WWK'  
*/ *iA4:EIP  
public class ImprovedMergeSort implements SortUtil.Sort { ?#A]{l  
8hanzwoJ:  
private static final int THRESHOLD = 10; Ol_q{^  
#dxgB:l)%l  
/* JYb}Zw;  
* (non-Javadoc) 2/ rt@{V(  
* 2BXy<BM @  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~nLN`H d  
*/ bC!`@/  
public void sort(int[] data) { >o,^b\  
int[] temp=new int[data.length]; ,MPB/j^o5!  
mergeSort(data,temp,0,data.length-1); Gbpw5n;e  
} rZXrT}Xh{W  
1Tp/MV/>  
private void mergeSort(int[] data, int[] temp, int l, int r) { $g9**b@  
int i, j, k; k;W@LfP  
int mid = (l + r) / 2; OHr Y(I6  
if (l == r) ZD/jX_!t  
return; I?#85l{>  
if ((mid - l) >= THRESHOLD) 9p* gU[  
mergeSort(data, temp, l, mid); HvwYm.$zE  
else `mfq 2bVc  
insertSort(data, l, mid - l + 1); /UcV  
if ((r - mid) > THRESHOLD) iSLGwTdLn  
mergeSort(data, temp, mid + 1, r); zw<p74DH  
else . 5y"38e  
insertSort(data, mid + 1, r - mid); ZzGahtx)Y  
y m,H@~  
for (i = l; i <= mid; i++) { iRo.RU8>  
temp = data; ;h=*!7:  
} #FOqP!p.E  
for (j = 1; j <= r - mid; j++) { Cs3^9m6;d  
temp[r - j + 1] = data[j + mid]; y;cUl, :v  
} zdl%iop3e  
int a = temp[l]; 7R.Q Ql  
int b = temp[r]; EI~"L$?  
for (i = l, j = r, k = l; k <= r; k++) { .jw}JJ  
if (a < b) { {]*x*aa\  
data[k] = temp[i++]; _9H*agRe  
a = temp; 3chPY4~A  
} else { (:V>Hjt  
data[k] = temp[j--];  +ECDD'^!  
b = temp[j]; :,12")N  
} ] Wy)   
} Psura$:  
} [&[^G25  
hY5WJ;  
/** $3T_ .  
* @param data ,fDEz9-,  
* @param l IzOYduJ.  
* @param i 4BYE1fUzd  
*/ EI>6Nh  
private void insertSort(int[] data, int start, int len) { %=we `&  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '7Nr8D4L  
} Cb t{ H}I3  
} ]M>9ULQ  
} N]EcEM#  
} d6{Gt"  
f*{ YFg?*&  
堆排序: sxKf&p;  
:AdDLpk3j  
package org.rut.util.algorithm.support; -~[9U,  
/^{BUo  
import org.rut.util.algorithm.SortUtil; Jf)bHjC_V  
JCcZuwu[  
/**  9fnA  
* @author treeroot #o/ H~Iv  
* @since 2006-2-2 5Z/GK2[HL  
* @version 1.0 hRI"y":zD  
*/ cq&*.  
public class HeapSort implements SortUtil.Sort{ 'TC/vnM  
.MW@;  
/* (non-Javadoc) &;,,H< p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1(Y7mM8\  
*/ m"\:o  
public void sort(int[] data) { `!:q;i]}  
MaxHeap h=new MaxHeap(); 1% F?B-k  
h.init(data); <$w?/y/'  
for(int i=0;i h.remove(); u cwnA  
System.arraycopy(h.queue,1,data,0,data.length); 9j ]sD/L5q  
} HmfG$Z  
X:a`B(@S  
private static class MaxHeap{ N..j{FE  
<}U'V}g  
void init(int[] data){ L9Z;:``p  
this.queue=new int[data.length+1]; RgorkZlVM  
for(int i=0;i queue[++size]=data; l\AMl \  
fixUp(size); .?p\n7  
} /&& 2u7*  
} do-ahl,  
aSuM2  
private int size=0; H.<a`m m8  
e~ aqaY~}  
private int[] queue; [3l*F  
n%R;-?*v  
public int get() { FlfI9mm  
return queue[1]; zl-2$}<a  
} V@7KsB  
K3uG2g(>2  
public void remove() { v%k9M{  
SortUtil.swap(queue,1,size--); TSAU?r\P  
fixDown(1); ^=n+T7"J  
} @D-AO_  
file://fixdown GLn{s  
private void fixDown(int k) { i&njqK!wS  
int j; 9YsR~SM  
while ((j = k << 1) <= size) { F62V 3 Xy  
if (j < size %26amp;%26amp; queue[j] j++; IW8+_#d  
if (queue[k]>queue[j]) file://不用交换 7"7rmZ   
break; Q$obOEr2(  
SortUtil.swap(queue,j,k); )%SkJ  
k = j; x:vu'A  
} !3i Gz_y  
}  rhpPCt  
private void fixUp(int k) { zWpqJK   
while (k > 1) { ZKQ hbNT  
int j = k >> 1; bWl5(S` Z  
if (queue[j]>queue[k]) 4L-:*b_v\  
break; {7cX#1  
SortUtil.swap(queue,j,k); EM7+VO(  
k = j; 2oa#0`{  
} %8*64T")  
} n .!Ym X4  
>@WX>0`ht  
} X1IeSMAe  
}?cGf- c  
} tt%MoQ)   
A*. /,KT  
SortUtil: JOjoiA  
5Zmw} M  
package org.rut.util.algorithm; oLWJm  
i{!T&8  
import org.rut.util.algorithm.support.BubbleSort; ,D\GGRw  
import org.rut.util.algorithm.support.HeapSort; nA|.t  
import org.rut.util.algorithm.support.ImprovedMergeSort; S[tE&[$(p  
import org.rut.util.algorithm.support.ImprovedQuickSort; mrm^e9*Z  
import org.rut.util.algorithm.support.InsertSort; >FhK #*Pa  
import org.rut.util.algorithm.support.MergeSort; ,f}UGd[a  
import org.rut.util.algorithm.support.QuickSort; i>EgG5iJ  
import org.rut.util.algorithm.support.SelectionSort; 7NC=*A~  
import org.rut.util.algorithm.support.ShellSort; < B_Vc:Q  
9ukg}_Hx  
/** D+ ~_TA  
* @author treeroot s[8@*/ds  
* @since 2006-2-2 2&+#Vsm`V  
* @version 1.0 J--m[X  
*/ T081G`li  
public class SortUtil { MYBx&]!\  
public final static int INSERT = 1; yCJFo  
public final static int BUBBLE = 2; r]W  
public final static int SELECTION = 3; 7nbB^2  
public final static int SHELL = 4; 79\Jx iSB  
public final static int QUICK = 5; > 0{S  
public final static int IMPROVED_QUICK = 6; U yw-2]!n  
public final static int MERGE = 7; s5RjIa0$7  
public final static int IMPROVED_MERGE = 8; v+jsC`m  
public final static int HEAP = 9; KXV[OF&J  
AtR?J"3E  
public static void sort(int[] data) { *lef=:&,,  
sort(data, IMPROVED_QUICK); 5XuT={o  
} i"|$(2  
private static String[] name={ fzjU<?}  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" | ohL]7b<  
}; T&86A\D\z  
"x@='>:$  
private static Sort[] impl=new Sort[]{ p8s:g~ W  
new InsertSort(), "<}&GcJbz  
new BubbleSort(), J5h+s-'  
new SelectionSort(), +A~\tK{  
new ShellSort(), e4~>G?rM_  
new QuickSort(), "Jjs"7  
new ImprovedQuickSort(), F}"]92  
new MergeSort(), LqdY Qd51  
new ImprovedMergeSort(), j)t+jcMUI  
new HeapSort() & c Ny  
}; j CTAKaq  
+0),xu  
public static String toString(int algorithm){ Qu,8t 8  
return name[algorithm-1]; d:G]1k;z  
} I@Xn3oN  
AxxJk"v'y  
public static void sort(int[] data, int algorithm) { .^$YfTabq  
impl[algorithm-1].sort(data); JQ :Ri  
} OB ~X/  
ExHKw~y9  
public static interface Sort { \5Vde%!$Z  
public void sort(int[] data); ) 'j:  
} [~:-&  
SWp1|.=Sm  
public static void swap(int[] data, int i, int j) { =)O,`.M.Y  
int temp = data; ogFKUD*h&>  
data = data[j]; Le"oAA#[  
data[j] = temp; syip;;  
} lnE+Au'  
} 2MA]jT  
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