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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。 pRC#DHcHh  
插入排序: 2-$R@ SVy  
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package org.rut.util.algorithm.support; }RD,JgmV  
NWKD:{  
import org.rut.util.algorithm.SortUtil; 7QQnvoP  
/** giI9-C  
* @author treeroot \\[P^ tsF  
* @since 2006-2-2 FCg,p2  
* @version 1.0 er97&5  
*/ *`dGapd3  
public class InsertSort implements SortUtil.Sort{ d~.#KS  
o<x2,uT  
/* (non-Javadoc) 5^%FEZ&Sp  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l!GAMK 6o  
*/ 6n>+cX>E  
public void sort(int[] data) { Z{%h6""  
int temp; u\6:Txqq  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); eQMY3/#  
} ^G5 _d"Gr  
} 42Z2Mjtk  
} X.g1 312~  
b8>r UGA{  
} ujHqw Rh  
< =sO@0(<  
冒泡排序: uZi]$/ic  
S?;&vs9j  
package org.rut.util.algorithm.support; 7Qz Uw  
i :@00)V{,  
import org.rut.util.algorithm.SortUtil; $dq R]'  
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/** @ 3FTf"#Y  
* @author treeroot c_+}`  
* @since 2006-2-2 5_{C \S`T  
* @version 1.0 98G>I(Cw%  
*/ DjtUX>e  
public class BubbleSort implements SortUtil.Sort{ Q!MS_ #O  
0zetOlFbO  
/* (non-Javadoc) GoZr[=d  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [.dF)I3  
*/ "4|D"|wI)  
public void sort(int[] data) { +wr2TT~  
int temp; E\5t&jZr  
for(int i=0;i for(int j=data.length-1;j>i;j--){ f8!*4Bw  
if(data[j] SortUtil.swap(data,j,j-1); 3 rV)JA  
} cd#@"&r  
} BH0].-)[y!  
} hgLwxJu  
} "}Vow^vb  
GeD^-.^  
} wHvX|GwMv  
k9xfv@v}  
选择排序: a)/!ifJ;  
3a_~18W  
package org.rut.util.algorithm.support; }$?x wcPU  
n3 -5`Jti  
import org.rut.util.algorithm.SortUtil; 2r]80sWY  
fczId"   
/** >$j?2,Za(V  
* @author treeroot }vgeQh-G  
* @since 2006-2-2 TFjb1 a,)  
* @version 1.0 &Rdg07e;>  
*/ DY/xBwIF  
public class SelectionSort implements SortUtil.Sort { \]1qAFB5  
ZF!cXo7d  
/* w3WBgH  
* (non-Javadoc) p"\Z@c  
* a<*q+a(*W  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) " N>~]  
*/ Ii FeO  
public void sort(int[] data) { jgNdcP  
int temp; 38#BINhBt  
for (int i = 0; i < data.length; i++) { *")Req  
int lowIndex = i; WdI9))J2S  
for (int j = data.length - 1; j > i; j--) { z3x /Y/X$S  
if (data[j] < data[lowIndex]) { W;!OxOWZJ  
lowIndex = j; B|XrjI?  
} yq]=+X>(  
} kCRfO}wt3  
SortUtil.swap(data,i,lowIndex); .^ djt  
} &8$Gy u  
} A{X:p3$eN  
blyU5 3g  
} 0P i+ (X  
[}:;B$,  
Shell排序: pZHx  
>J(._K  
package org.rut.util.algorithm.support; F#Y9 @E  
$r+ _Y/  
import org.rut.util.algorithm.SortUtil; b?i5C4=K  
0])D)%B k  
/** C)Ep}eHjf_  
* @author treeroot %  ]G'u  
* @since 2006-2-2 >V1vw7Pa  
* @version 1.0 ,^wjtA 3j8  
*/ O?,Grn%'.  
public class ShellSort implements SortUtil.Sort{ TP3KT)  
7]sRHX0o%  
/* (non-Javadoc) k0r93 xa  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0MpZdJ  
*/ Ln+;HorZ]  
public void sort(int[] data) { O1+OE!w  
for(int i=data.length/2;i>2;i/=2){ "{9^SPsp  
for(int j=0;j insertSort(data,j,i); +%Z#!1u  
} N W]zMU{c  
} ^5E:hW [*  
insertSort(data,0,1); 1FA:"0lO  
} 2 o)8'Lp  
h4ozwVA  
/** Q Uy7Q$W  
* @param data ~cv322N   
* @param j i1dE.f ;  
* @param i '8w}m8{y  
*/ >;Ag7Ex  
private void insertSort(int[] data, int start, int inc) { Uc%kyTBm1  
int temp; R E0ud_q2  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); )&6ZgRq  
} i2P:I A|@  
} ]Z IreI  
}  L}=DC =E  
'vwu^u?  
} j DkBe-`  
G)IK5zCDd  
快速排序: v? Zo5uVoq  
mWUkkR(/  
package org.rut.util.algorithm.support; 3*zywcTH  
BaVooN~C  
import org.rut.util.algorithm.SortUtil; :u]QEZ@@  
dL]wu! wE  
/** Na>w~  
* @author treeroot FLo`EE":O(  
* @since 2006-2-2 !$NQF/Ol  
* @version 1.0 s^>  >]  
*/ hnimd~E52k  
public class QuickSort implements SortUtil.Sort{ BgT(~8'  
0`/CoP<U  
/* (non-Javadoc) )DGJr/)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |LRAb#F\  
*/ k4PXH  
public void sort(int[] data) { @#=yC.s  
quickSort(data,0,data.length-1); =w!2R QB  
} I~GHx5Dk  
private void quickSort(int[] data,int i,int j){ |It&1fz}  
int pivotIndex=(i+j)/2; &+0?Xip{Z  
file://swap Cg(&WJw(ep  
SortUtil.swap(data,pivotIndex,j); WMa`! Q  
Y(u`K=*  
int k=partition(data,i-1,j,data[j]); '|<r[K  
SortUtil.swap(data,k,j); |xF!3GGms  
if((k-i)>1) quickSort(data,i,k-1); ;t M  
if((j-k)>1) quickSort(data,k+1,j); $ V !25jQ  
;|`< B7xf  
} ^T#jBqe  
/** LzxO=+=9!q  
* @param data 0(>3L:  
* @param i X~cdM1z?  
* @param j &2Ef:RZF  
* @return "Zy:q'`o  
*/ (*b<IGi;  
private int partition(int[] data, int l, int r,int pivot) { hQ}_(F_H  
do{ (xE |T f  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); q65]bs4M  
SortUtil.swap(data,l,r); ~MP |L?my  
} J$PlI  
while(l SortUtil.swap(data,l,r); i&8|@CACb  
return l; 7n?yf_ je  
} za+)2/ `L  
Bd7B\zM  
} [Y~~C J  
&4+|{Zx0  
改进后的快速排序: \#xq$ygg  
h@Jg9AM  
package org.rut.util.algorithm.support; :|$cG~'J  
{F2Rv  
import org.rut.util.algorithm.SortUtil; &AOGg\  
7{(UiQbf  
/** .k-6LR  
* @author treeroot |d&C<O;f  
* @since 2006-2-2 gL-kI *Ra  
* @version 1.0 uI9*D)  
*/ '`|j{mBhG  
public class ImprovedQuickSort implements SortUtil.Sort { -KV,l  
vy}_aD{B  
private static int MAX_STACK_SIZE=4096; N$=9R  
private static int THRESHOLD=10; c|JQ0] K  
/* (non-Javadoc) t$%<eF@w  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 z~|SmP1  
*/ Ow*va\0  
public void sort(int[] data) { /8Y8-&K0  
int[] stack=new int[MAX_STACK_SIZE]; tW4X+d"  
Z5n-3h!+ED  
int top=-1; u:lBFVqk  
int pivot; 1/m$#sz  
int pivotIndex,l,r; jrFPd  
U3z23LgA  
stack[++top]=0; l"A/6r!Dp  
stack[++top]=data.length-1; [8UZ5_1WL  
p<(a);<L  
while(top>0){ Q-V8=.  
int j=stack[top--]; C4$P#DZT^  
int i=stack[top--]; Dk a8[z7  
@wa"pWx8  
pivotIndex=(i+j)/2; l[IL~  
pivot=data[pivotIndex]; ?g{[U0)  
K<:%ofB"S  
SortUtil.swap(data,pivotIndex,j); o-Dfud@  
Iy49o!  
file://partition b9vud r  
l=i-1; G#e]J;   
r=j; 'g,_lF  
do{ L=qhb;  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); XWAIW= .  
SortUtil.swap(data,l,r); 5I2 h(Td  
} .tLRY  
while(l SortUtil.swap(data,l,r); &! h~UZ  
SortUtil.swap(data,l,j); G gA:;f46  
S$hxR  
if((l-i)>THRESHOLD){ (E@;~7L  
stack[++top]=i; ?i0+h7 =6  
stack[++top]=l-1; DJgM>&Y6,  
} `Wjq$*  
if((j-l)>THRESHOLD){ C(v'7H{4cW  
stack[++top]=l+1; #K:iB*  
stack[++top]=j; 1="]'!2Is  
} fqbeO9x  
VnSO>O  
} 7F>]zrbK  
file://new InsertSort().sort(data); kVM*[<k  
insertSort(data); ~&p]kmwXSX  
} q6$6:L,<  
/** d+v| &yN  
* @param data NpZ'pBl  
*/ 5]]QW3  
private void insertSort(int[] data) { 4y+hr   
int temp; SaF0JPm4z  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); _ps4-<ugC  
} Zy3F%]V0  
} `Zo5!"'  
} jrN 5l1np  
#e-7LmO~  
} c^1JSGv  
OfBWf6b  
归并排序: aC1 xt(  
89D`!`Ah]  
package org.rut.util.algorithm.support; 3{co.+  
=/|GWQ j  
import org.rut.util.algorithm.SortUtil; =Xr{ Dg  
,e1c,}  
/** uGXvP(Pg'  
* @author treeroot ~I> |f  
* @since 2006-2-2 W`_Wi*z4  
* @version 1.0 3=ME$%f  
*/ rjcH[U(  
public class MergeSort implements SortUtil.Sort{ XS@iu,uO  
|>j^$^l~  
/* (non-Javadoc) ;WN% tI)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ja*,ht(5  
*/ >BO!jv!a  
public void sort(int[] data) { cp8w _TPU  
int[] temp=new int[data.length]; tQ; Fgv8Y!  
mergeSort(data,temp,0,data.length-1); st"@kHQ3  
} OI)k0t^;D  
0K^@P #{hd  
private void mergeSort(int[] data,int[] temp,int l,int r){ D&mPYxXL  
int mid=(l+r)/2; Fczia0@z  
if(l==r) return ; %1;Y`>  
mergeSort(data,temp,l,mid); 8cY5:plK  
mergeSort(data,temp,mid+1,r); 4jZt0  
for(int i=l;i<=r;i++){ LL3| U  
temp=data; ~8k`~t!  
} (0 t{  
int i1=l; rM~Mqpk  
int i2=mid+1; UVi9}zr  
for(int cur=l;cur<=r;cur++){ :+_H%4+  
if(i1==mid+1) Z] cFbl\ma  
data[cur]=temp[i2++]; ]OKKR/:  
else if(i2>r) J^` pE^S  
data[cur]=temp[i1++]; )0 6. dZq\  
else if(temp[i1] data[cur]=temp[i1++]; C;ha2UV0H  
else O>rz+8T  
data[cur]=temp[i2++]; t9W*N\  
} fF/;BSq'  
} 8j&1qJx)  
U .^%7.  
} Q"pZPpl&  
'2|mg<Ft  
改进后的归并排序: uh)f/)6  
96F+I!qC  
package org.rut.util.algorithm.support; ^JIs:\ g<<  
QB* AQ5-  
import org.rut.util.algorithm.SortUtil; dXt@x8E  
yyVJb3n5:!  
/** {2g?+8L$Z  
* @author treeroot PL\4\dXB  
* @since 2006-2-2 !C' Y 7  
* @version 1.0 Gqar5  
*/ "$%&C%t  
public class ImprovedMergeSort implements SortUtil.Sort { 6 ;\>,  
y>UQm|o<W  
private static final int THRESHOLD = 10; /WAOpf5  
`a7b,d  
/* K^AIqL8  
* (non-Javadoc) O'~^wu.  
* <3k9 y^0  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \@6w;tyi  
*/ B$97"$#u  
public void sort(int[] data) { !qs~j=;y3  
int[] temp=new int[data.length]; G"yhu +  
mergeSort(data,temp,0,data.length-1); G\f:H%[5[  
} r`0oI66B/  
BXl Y V"  
private void mergeSort(int[] data, int[] temp, int l, int r) { zq^eL=%:  
int i, j, k; OOus*ooo2  
int mid = (l + r) / 2; !Cm9DzG  
if (l == r) +{ e2TY  
return; NTM.Vj -_h  
if ((mid - l) >= THRESHOLD) Xdf;'|HO  
mergeSort(data, temp, l, mid); '! ;Xxe5  
else 5Obv/C  
insertSort(data, l, mid - l + 1); ]'i}}/}u2  
if ((r - mid) > THRESHOLD) /LCRi  
mergeSort(data, temp, mid + 1, r); HFj@NRE6  
else a=^>A1=  
insertSort(data, mid + 1, r - mid); h7\16j  
8g_GXtn(z  
for (i = l; i <= mid; i++) { /Q9iO&Vu  
temp = data; @2A&eLw LH  
} ~ln96*)M;  
for (j = 1; j <= r - mid; j++) { P.t7_v>  
temp[r - j + 1] = data[j + mid]; >RmL0d#B  
} c$%I^f}'  
int a = temp[l]; 6k\8ulHw  
int b = temp[r]; 7LW %:0  
for (i = l, j = r, k = l; k <= r; k++) { $xj>j  
if (a < b) { euh rEjwkH  
data[k] = temp[i++]; %i9*2{e#~  
a = temp; .TRp74  
} else { \G]vTK3  
data[k] = temp[j--]; qZ+^ND(I  
b = temp[j]; W(*?rA-PP  
} Y5Z<uD  
} z6Yx )qBE<  
} pXxpEv  
9d,2d5Y  
/** ?m.Ry  
* @param data Xu5^ly8p9q  
* @param l ?[Qxq34  
* @param i %?:eURQ  
*/ I9r> 3?  
private void insertSort(int[] data, int start, int len) { 7;:Uv=  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o>4GtvA*  
} ?pF uV`Zm  
} }W R?n  
} M$GZK'%  
} Jp`qE  
ulnlRx  
堆排序: P EAo'63$  
T .L>PL ?=  
package org.rut.util.algorithm.support; mOi 8W,2  
{BJn9B  
import org.rut.util.algorithm.SortUtil; J{5&L &4  
GCA?sFwo>  
/** |/35c0IM  
* @author treeroot y 4jelg  
* @since 2006-2-2 S A16Ng  
* @version 1.0 k39;7J  
*/ GSu&Z/Jo  
public class HeapSort implements SortUtil.Sort{ ?wS/KEl=O  
q ]o ^Y  
/* (non-Javadoc) |b:91l  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wd_KZ}lX  
*/ 41`&/9:"_M  
public void sort(int[] data) { 4m$Xjj`vE  
MaxHeap h=new MaxHeap(); "*aL(R  
h.init(data); dD8f`*"*=  
for(int i=0;i h.remove(); HBnnIbEtF'  
System.arraycopy(h.queue,1,data,0,data.length); )[hQK_e]  
} .q7o7J%  
;7 Y4 v`m  
private static class MaxHeap{ CR<Nau>  
_!*??B6u  
void init(int[] data){ n$y)F} .-  
this.queue=new int[data.length+1]; 4!KUPgg  
for(int i=0;i queue[++size]=data; d$`NApr  
fixUp(size); ueazAsk3g  
} RZ&T\;m,7  
} v81H!c.*  
n$T'gX#5  
private int size=0; <U() *0  
xT$9M"  
private int[] queue; ^8yhx-mgb  
wtw  
public int get() { S>pbplE  
return queue[1]; V<;w  
} r/vRaOg>X  
iv/!c Mb  
public void remove() { noa =wy  
SortUtil.swap(queue,1,size--); sC.aT(meJ  
fixDown(1); ,s,VOyr @F  
} ,2YkQ/ >  
file://fixdown KDX34Fr1  
private void fixDown(int k) { \{ui{8+G  
int j; nZ 0rxx[V?  
while ((j = k << 1) <= size) { Sc zYL?w^  
if (j < size %26amp;%26amp; queue[j] j++; l4sFT)}-J  
if (queue[k]>queue[j]) file://不用交换 pkL&j<{  
break; Yw\PmRL"p  
SortUtil.swap(queue,j,k); fc #zhp5bX  
k = j; &u'$q  
} "NamP\hj  
} hkq[xgX  
private void fixUp(int k) { ZsPT!l,  
while (k > 1) { t:G67^<3  
int j = k >> 1; C"P40VQoo  
if (queue[j]>queue[k]) ,:QzF"MV  
break; O:Fnxp5@  
SortUtil.swap(queue,j,k); _8CE|<Cn  
k = j; m*MfGj(  
} / b_C9'S  
} (hn@+hc  
6:(*u{  
} Iu`xe  
 S=o1k  
} ']hB_ 4v  
 Wb/q&o  
SortUtil: Ty21-0 F  
[BpIzhy&}  
package org.rut.util.algorithm; L+&eY?A  
OXs-gC{b  
import org.rut.util.algorithm.support.BubbleSort; c.u$NnDU6  
import org.rut.util.algorithm.support.HeapSort; f@%H"8w!  
import org.rut.util.algorithm.support.ImprovedMergeSort; L/,W  
import org.rut.util.algorithm.support.ImprovedQuickSort; C]tHk)<|42  
import org.rut.util.algorithm.support.InsertSort; p<2A4="&  
import org.rut.util.algorithm.support.MergeSort; t@TBx=16  
import org.rut.util.algorithm.support.QuickSort; '@ym-\,  
import org.rut.util.algorithm.support.SelectionSort; w7?&eF(w(  
import org.rut.util.algorithm.support.ShellSort; 9w Pc03a  
B%c):`w8]  
/** e.<$G'  
* @author treeroot oc>ne]_'  
* @since 2006-2-2 v^a. b  
* @version 1.0 gm63dE>  
*/ Q}a 1P8?S  
public class SortUtil { tf?u ;n  
public final static int INSERT = 1; \)=X=yn2  
public final static int BUBBLE = 2; yk4Huq&2  
public final static int SELECTION = 3; QGYO{S  
public final static int SHELL = 4; 3:f<cy   
public final static int QUICK = 5; uj_ OWre  
public final static int IMPROVED_QUICK = 6; DA_[pR  
public final static int MERGE = 7;  Sxrbhnx  
public final static int IMPROVED_MERGE = 8; 4,!S?:7  
public final static int HEAP = 9; G H N  
meHAa`  
public static void sort(int[] data) { ]E1aIt  
sort(data, IMPROVED_QUICK); Qo !/]\  
} ckXJ9>  
private static String[] name={ b{C3r3B8  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5 JE8/CbH  
}; R$<LEwjSw  
8,BNs5  
private static Sort[] impl=new Sort[]{ _yq"F#,*  
new InsertSort(), :h1-i  
new BubbleSort(), 0Dj<-n{9  
new SelectionSort(), ;IC:]Zu  
new ShellSort(), HB+\2jEE  
new QuickSort(), +)C?v&N  
new ImprovedQuickSort(), <n iq*  
new MergeSort(), 5G@z l  
new ImprovedMergeSort(), M+X>!Os  
new HeapSort() `c^ _5:euX  
}; )&"l3*x  
K<O1PrC  
public static String toString(int algorithm){ :" 9 :J  
return name[algorithm-1]; O Xy>Tlv  
} 36154*q  
N#-P}\Q9  
public static void sort(int[] data, int algorithm) { ;?>xuC$  
impl[algorithm-1].sort(data); +1j@n.)ft  
} [-)N}rL>  
(Yz EsY  
public static interface Sort { `p@YV(  
public void sort(int[] data); iV!o)WvG,F  
} i]:T{2  
2f8fA'|O  
public static void swap(int[] data, int i, int j) { `B{N3Kxbp  
int temp = data; [HJ^'/bB'  
data = data[j]; >yC1X|d~t  
data[j] = temp; +$KUy>  
} #/NZ0IbHk  
} VC "66 \d&  
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