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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。 M{z&h>  
插入排序: D`'h8:\  
.(^%M 2:6  
package org.rut.util.algorithm.support; vRkVPkZ6|  
(N6=+dNY  
import org.rut.util.algorithm.SortUtil; 8q]_> X  
/** `\beQ(g  
* @author treeroot bblEZ%  
* @since 2006-2-2 t5CJG'!ql  
* @version 1.0 $bU.6  
*/ /&N\#;kK?b  
public class InsertSort implements SortUtil.Sort{ GX+Gqj.  
%)ri:Qq  
/* (non-Javadoc)  eC[G4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,UYe OM2Ao  
*/ h[bC#(  
public void sort(int[] data) { 3mQ3mV:  
int temp; "M;[c9  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); &t U&ZH  
} '2qbIYanh  
} [_`<<!u>-  
} yi8AzUW cW  
fBb:J+  
} /&H l62Ak  
Fs}B\R/J  
冒泡排序: |Ed?s  
w1EB>!<;tj  
package org.rut.util.algorithm.support; Zd| u>tn  
1@t8i?:h  
import org.rut.util.algorithm.SortUtil; v4]#Nc$~T  
*5u3d`bW  
/** /hur6yI8  
* @author treeroot hbe";(  
* @since 2006-2-2 _WGWU7h  
* @version 1.0 ~ #jnkD  
*/ kXWC o6?  
public class BubbleSort implements SortUtil.Sort{ oj=% < a  
:IO"' b  
/* (non-Javadoc) lDL(,ZZS`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) * V_b/Vt  
*/ ef@F!s_fI  
public void sort(int[] data) { $a|>>?8  
int temp; 5g`J}@"k  
for(int i=0;i for(int j=data.length-1;j>i;j--){ S c ijf 9  
if(data[j] SortUtil.swap(data,j,j-1); gj7'4 3 ?W  
} VtzBYza  
} 33ZHrZ  
} Jt:)(&-t   
} _VB;fH$  
4j}.=u*X7  
} 1@N4Y9o  
BXNC(^  
选择排序: KBoW(OP4'  
vjVa),2  
package org.rut.util.algorithm.support; 29nMm>P.e  
+W/{UddeKU  
import org.rut.util.algorithm.SortUtil; SBaTbY0  
dUBf.2 ry  
/** CD. XZA[  
* @author treeroot wHZ(=z/q  
* @since 2006-2-2 E#A}2|7,g  
* @version 1.0 [s+FX5'K  
*/ _&N:%;9uD  
public class SelectionSort implements SortUtil.Sort { *Z+U}QhHD6  
2q UX"a4  
/* u/CR7Y  
* (non-Javadoc) >[N6_*K]  
* _PLZ_c:O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sC ?e%B  
*/ sY[!=`@  
public void sort(int[] data) { /g1;`F(MS/  
int temp; ~<}?pDA}~  
for (int i = 0; i < data.length; i++) { o{' J O3  
int lowIndex = i; i)/#u+Y1P  
for (int j = data.length - 1; j > i; j--) { (S?qxW?  
if (data[j] < data[lowIndex]) { M<x><U#]A  
lowIndex = j; ?y@;=x!'  
} <'j ygZ(  
} #sv:)p  
SortUtil.swap(data,i,lowIndex); J[UTn'M8]  
} <vzU}JA\  
} =I9hGj6  
A9WOu*G1O  
} &?I3xzvK  
Z1h6Y>j  
Shell排序: -^*8D(j*  
ZftucD|ZY/  
package org.rut.util.algorithm.support; 8/}S/$  
Sq5}v]k@&  
import org.rut.util.algorithm.SortUtil; 29W`L2L  
8}X>u2t  
/** c],Zw  
* @author treeroot <J]N E|:  
* @since 2006-2-2 ,!^g8zO  
* @version 1.0 MIu'OJ"z~  
*/ R0yp9icS  
public class ShellSort implements SortUtil.Sort{ _$mS=G(  
]>0$l _V  
/* (non-Javadoc) >w1jfpQ@t$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;p"#ZS7  
*/ <^+&A7 Q-_  
public void sort(int[] data) { {;38&Izwz  
for(int i=data.length/2;i>2;i/=2){ QvzE:]pyi  
for(int j=0;j insertSort(data,j,i); Q@TeU#2Y  
} z-|d/#h  
} 2{G7ignv  
insertSort(data,0,1); i7?OZh*f  
} 4)9Pgp :  
?#:!!.I:  
/** L(/wsw~y*  
* @param data m;<5QK8f  
* @param j "^t;V+Io  
* @param i "77l~3  
*/ 2bf#L?5g/  
private void insertSort(int[] data, int start, int inc) { Ut(BQM>U+$  
int temp; S+pm@~xe  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); =]L#v2@  
} `J}FSUn\  
} ` kZ"5}li  
} d 8z9_C-  
_2<k,Dl;RY  
}  P!/:yWd  
Iy2AJ|d.  
快速排序: I^QB`%v5  
&qV_|f;  
package org.rut.util.algorithm.support; ++}#pl8e  
pS!N<;OWr  
import org.rut.util.algorithm.SortUtil; b~+\\,q}  
F'55BY*!  
/** ([hd  
* @author treeroot U6M&7 l8  
* @since 2006-2-2 r+n hm"9  
* @version 1.0 s=XqI@  
*/ Uc j>gc=  
public class QuickSort implements SortUtil.Sort{ V/8yW3]Xy  
<h~_7Dn  
/* (non-Javadoc) w'Jo).OW~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6o GF6C  
*/ .a|ROjd!  
public void sort(int[] data) { XOzZtt  
quickSort(data,0,data.length-1); &^ =Y76  
} (XQl2C  
private void quickSort(int[] data,int i,int j){ B)ibxM(n*  
int pivotIndex=(i+j)/2; %U$%x  
file://swap !?m8UE  
SortUtil.swap(data,pivotIndex,j); =(,dI [v  
Rx4O?7;  
int k=partition(data,i-1,j,data[j]); L;' v,s  
SortUtil.swap(data,k,j); KkZo|\V  
if((k-i)>1) quickSort(data,i,k-1); N4, !b_1  
if((j-k)>1) quickSort(data,k+1,j); )eWg2w]  
YifTC-Q;  
} 1<f,>BQ+  
/** ^^(4xHN  
* @param data oSoU9_W  
* @param i /7b$C]@k  
* @param j I=V]_Ik4 N  
* @return 7/Mhz{o;W  
*/ x;/%`gKn8  
private int partition(int[] data, int l, int r,int pivot) { r)Iq47Uiw  
do{ ?E7.x%n7X5  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); [M:BJ%*  
SortUtil.swap(data,l,r); D^2yP~(  
} :;Wh!8+j  
while(l SortUtil.swap(data,l,r); G6j9,#2@  
return l; $!"*h  
} p:qj.ukw  
j=w`%nh4"f  
} qo0]7m7|  
QLyBP!X-  
改进后的快速排序: PF-"^2&_  
ON$-g_s>)  
package org.rut.util.algorithm.support; tJ9`Ys  
O0> ^?dsL  
import org.rut.util.algorithm.SortUtil; _6'HBE  
2a:JtJLl  
/** CFx$r_!~  
* @author treeroot :WdiH)Zv  
* @since 2006-2-2 W_G'wU3R  
* @version 1.0 MXuiQ;./  
*/ ^1+&)6s7V  
public class ImprovedQuickSort implements SortUtil.Sort { \YsYOFc|  
9@z"~H  
private static int MAX_STACK_SIZE=4096; TWJ%? /d  
private static int THRESHOLD=10; .cm$*>LW:x  
/* (non-Javadoc) #3Jn_Y%P.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hh.l,Z7i7D  
*/ V s1Z$HS`  
public void sort(int[] data) { 54, (;  
int[] stack=new int[MAX_STACK_SIZE]; eMDraJv@  
j*N:Kdzvl  
int top=-1; C9FQo7   
int pivot; `}f wR  
int pivotIndex,l,r; qQ UCK  
"# BI"  
stack[++top]=0; a;e~D 9%1  
stack[++top]=data.length-1; [O(8iz v  
].<B:]:,  
while(top>0){ khtSZ"8X  
int j=stack[top--]; j]5bs*G  
int i=stack[top--]; 2:l8RH!Y  
K ZSvT{  
pivotIndex=(i+j)/2; )]5}d$83  
pivot=data[pivotIndex]; }W k!):=y  
QWV12t$v  
SortUtil.swap(data,pivotIndex,j); -?68%[4lm_  
-.X-02  
file://partition QGQ> shIeZ  
l=i-1; IXef}%1N?  
r=j; [.NG~ cpb  
do{ )R'~{;z }  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ]J7.d$7T  
SortUtil.swap(data,l,r); DZ Q=Sinry  
} Ljjuf=]  
while(l SortUtil.swap(data,l,r); Th)Z?\8zk  
SortUtil.swap(data,l,j); /<$\)|r  
&udlt//^%  
if((l-i)>THRESHOLD){ * "Z5bKL  
stack[++top]=i; aM|^t:  
stack[++top]=l-1; s!j[Ovtx  
} G\1\L*+0  
if((j-l)>THRESHOLD){ B#K{Y$!v  
stack[++top]=l+1; u:f.g?!`"  
stack[++top]=j; 7U\GX  
} G>);8T%l  
&z(E-w/S  
} L^0s  
file://new InsertSort().sort(data); [~<X|_L G  
insertSort(data); U6@Hgi>  
} :v!e8kM\x  
/** 9I;d>%  
* @param data .`3O4]N[  
*/ ==\Qj{ 7`  
private void insertSort(int[] data) { u 6(O;  
int temp; yy%'9E ldc  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ]l WEdf+  
} _c 4kj  
} $ RDwy)9  
} x2bKFJ>e@  
JXIxk"m  
} !w8t`Z['  
i/%+x-#  
归并排序: 6RLYpQ$+  
S3iXG @  
package org.rut.util.algorithm.support; ?(4E le  
/RzL,~]  
import org.rut.util.algorithm.SortUtil; xQ=sZv^M  
|99/?T-QW  
/** B~RVFc +  
* @author treeroot jLRh/pbz4  
* @since 2006-2-2 :d ts>  
* @version 1.0 8(Ab NQ  
*/ y7quKv7L}  
public class MergeSort implements SortUtil.Sort{ *|T]('xwC  
V9 dRn2- [  
/* (non-Javadoc) M;\iL?,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8AK=FX&@&  
*/ 0Y81B;/F  
public void sort(int[] data) { #ONad0T;  
int[] temp=new int[data.length]; .W#-Cl&n8  
mergeSort(data,temp,0,data.length-1); %&RF;qa2xu  
} <B?@,S>  
-<[MM2Y  
private void mergeSort(int[] data,int[] temp,int l,int r){ a$*)d($  
int mid=(l+r)/2; oXef<- :  
if(l==r) return ; Wz~=JvRHh  
mergeSort(data,temp,l,mid); s?8vs%(l  
mergeSort(data,temp,mid+1,r); 1yS [;  
for(int i=l;i<=r;i++){ W'BB FG  
temp=data; ]b"Oy}ARW  
} bZE;}d  
int i1=l; t0 1@h_ WS  
int i2=mid+1; NT6OGBl&  
for(int cur=l;cur<=r;cur++){ <GbF4\ue  
if(i1==mid+1) S~9K'\vO  
data[cur]=temp[i2++]; _qq> 43  
else if(i2>r) CHeU?NtFps  
data[cur]=temp[i1++]; Stkyz:,(  
else if(temp[i1] data[cur]=temp[i1++]; ^}+qd1r  
else iz&$q]P8  
data[cur]=temp[i2++]; zF9SZ#{a  
} 4' ym vR  
} RpAqnDX)  
%MQU&H9[  
} X2? ^t]-N  
ZH:-.2*cj  
改进后的归并排序: mUmU_L u8  
*v}8n95*2  
package org.rut.util.algorithm.support; x +=zG4Hm  
4;]<#u  
import org.rut.util.algorithm.SortUtil; 1VlRdDg  
ADTx _tE  
/** /!l$Y?  
* @author treeroot b ?p <y`  
* @since 2006-2-2 X0\2qD  
* @version 1.0 -bN;nSgb  
*/ OT*C7=  
public class ImprovedMergeSort implements SortUtil.Sort { q`HuVilNH  
_(K)(&  
private static final int THRESHOLD = 10; Aj854 L(!  
JumZ>\'p(  
/* </UUvMf"  
* (non-Javadoc) f4JmY1)@  
* ~6HpI0i  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :2'y=t#  
*/ )U?Tmh  
public void sort(int[] data) { tl 0_Sd  
int[] temp=new int[data.length]; WF)(Q~op0U  
mergeSort(data,temp,0,data.length-1); G E=J Y  
}  I~'%  
KW* 2'C&  
private void mergeSort(int[] data, int[] temp, int l, int r) { {`FkiB` i  
int i, j, k; SXYH#p  
int mid = (l + r) / 2; yqEX0|V%  
if (l == r) X"4 :#s  
return; B-oQ 9[~  
if ((mid - l) >= THRESHOLD) rd*`8B  
mergeSort(data, temp, l, mid); i++a^f  
else $pV:)N4  
insertSort(data, l, mid - l + 1); YP^=b}  
if ((r - mid) > THRESHOLD) JHxy_<p/  
mergeSort(data, temp, mid + 1, r); XX85]49`%  
else BGtr=&Hq  
insertSort(data, mid + 1, r - mid); B6N/nCvHK  
n{d0}N =  
for (i = l; i <= mid; i++) { E [:eMJR  
temp = data; zTgY=fuz  
} j20/Q)=h  
for (j = 1; j <= r - mid; j++) { Lro[ |A  
temp[r - j + 1] = data[j + mid]; |K|[>[?Z/  
} $+ z 3  
int a = temp[l]; Q]JWWKt6rV  
int b = temp[r]; aG"j9A~ &  
for (i = l, j = r, k = l; k <= r; k++) { (i1 JDe  
if (a < b) { N~""Lc&  
data[k] = temp[i++]; p?uk|C2  
a = temp; ~4 ~c+^PF  
} else { TY."?` [FK  
data[k] = temp[j--]; 7L%JCH#F  
b = temp[j]; Nl4,c[$C  
} -0QoVGw  
} b^*9m PP  
} #?OJ9pyG'  
*oby(D"p  
/** {8TLL @T4  
* @param data iS p +~  
* @param l R[C+?qux  
* @param i Kyf,<z F  
*/ e=>:(^CS   
private void insertSort(int[] data, int start, int len) { 1@dB*Jt  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #x?Ku\ts  
} mY1I{ '.  
} x7<2K(  
} .wU0F  
} .tdaj6x  
HT`k-}ho,  
堆排序: N)I9NM[  
6'{/Ote  
package org.rut.util.algorithm.support; D*%?0  
Q9yIQ{>H[  
import org.rut.util.algorithm.SortUtil; 6`PQP;   
Q#Tg)5.\  
/** (#&-ld6  
* @author treeroot $ Jz(Lb{  
* @since 2006-2-2 ]C;X/8'Jf5  
* @version 1.0 t@&U2JaL>W  
*/ / 5!0wxN  
public class HeapSort implements SortUtil.Sort{ ag_*Z\  
.+07 Ui]I!  
/* (non-Javadoc) -JEiwi,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J~]Y  
*/ |)+s,LT5  
public void sort(int[] data) { tJM#/yT  
MaxHeap h=new MaxHeap(); ){nOM$W  
h.init(data); ^xyU *A}D  
for(int i=0;i h.remove(); afw`Heaa2(  
System.arraycopy(h.queue,1,data,0,data.length); rAn:hR{  
} 7C&J88|\  
V0l"tr@  
private static class MaxHeap{ &KYPi'C9!z  
Q$yMU [l)  
void init(int[] data){ 5%_aN_1?ef  
this.queue=new int[data.length+1]; 22T\ -g{  
for(int i=0;i queue[++size]=data; K8=jkU  
fixUp(size); Sx0/Dm  
} b8 ^O"oDrp  
} }@y(-7t  
{;L,|(o^  
private int size=0; ^ Fnag]qQ  
Ka_g3  
private int[] queue; S4_C8  
gkM Q=;Nn  
public int get() { e7Sp?>-d  
return queue[1]; "5!T-Z+F  
} +a'LdEp  
1K UM!DUD  
public void remove() { V0<g$,W=  
SortUtil.swap(queue,1,size--); j* ZU}Ss  
fixDown(1); yPd6{% w  
} 2dyS_2u  
file://fixdown 5|jsv)M+  
private void fixDown(int k) { -U{CWn3G  
int j; = yFOH~_  
while ((j = k << 1) <= size) { |iA8aHFU  
if (j < size %26amp;%26amp; queue[j] j++; &7XsyDo6  
if (queue[k]>queue[j]) file://不用交换 '5m4kDs  
break; FN w0x6,~R  
SortUtil.swap(queue,j,k); hh-a+] c0  
k = j; #z1/VZ  
} 5SMV3~*P  
} k\TP3*fD  
private void fixUp(int k) { yW)r`xpY  
while (k > 1) { h"y~!NWn  
int j = k >> 1; B1V+CP3t  
if (queue[j]>queue[k]) I/*^s  
break; SHYbQF2  
SortUtil.swap(queue,j,k); LVNA`|>  
k = j; a&Z,~Vp  
} ]6 HR  
} p9E/#U8A_  
wVq9t|V  
} {4$aA*  
DDq?4  
} i-}T t<^  
n) j0h-  
SortUtil: I 6'!b/  
p/qu4[Mm  
package org.rut.util.algorithm; P6I<M}p  
(!PsK:wc  
import org.rut.util.algorithm.support.BubbleSort; S"t\LB*'Ls  
import org.rut.util.algorithm.support.HeapSort; ~dC.,"  
import org.rut.util.algorithm.support.ImprovedMergeSort; z1^3~U$}  
import org.rut.util.algorithm.support.ImprovedQuickSort; ([dwZ6$/J  
import org.rut.util.algorithm.support.InsertSort; >V>`}TIH  
import org.rut.util.algorithm.support.MergeSort; AQ?;UDqU  
import org.rut.util.algorithm.support.QuickSort; t#VX#dJ  
import org.rut.util.algorithm.support.SelectionSort; 5WA:gygB&  
import org.rut.util.algorithm.support.ShellSort; /9A6"Z  
5\EnD, y  
/** R,s}<N$  
* @author treeroot kTcW=AXu  
* @since 2006-2-2 Qr_0 L  
* @version 1.0 P }^Y"zF2  
*/ =A*a9c2  
public class SortUtil { !9{hbmF#  
public final static int INSERT = 1; Qo!F?i/ n  
public final static int BUBBLE = 2; w~q ]&  
public final static int SELECTION = 3; g=KvCqJN  
public final static int SHELL = 4; `fOp>S^Q4  
public final static int QUICK = 5; {b'  
public final static int IMPROVED_QUICK = 6; sYfm]Faz  
public final static int MERGE = 7; )vUS).;S`  
public final static int IMPROVED_MERGE = 8; |~ytAyw  
public final static int HEAP = 9; dC;&X g`  
ts% n tnvI  
public static void sort(int[] data) { &Dt=[yqeG  
sort(data, IMPROVED_QUICK); }Q*J!OH  
} Uq @].3nf  
private static String[] name={ !x:{"  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OFBEJacy  
}; }.pqV X{ d  
PhPe7^  
private static Sort[] impl=new Sort[]{ %#o@c  
new InsertSort(), <d"nz:e  
new BubbleSort(), Fe %Vp/  
new SelectionSort(), vcCNxIzEG  
new ShellSort(), B9Mp3[   
new QuickSort(), d >NO}MR  
new ImprovedQuickSort(), d&AO 4^  
new MergeSort(), ^<Gxip  
new ImprovedMergeSort(), A|4om=MO  
new HeapSort() @lX%Fix9  
}; #jzF6j%G  
-LT!LBnEkf  
public static String toString(int algorithm){ 8#HnV%|N  
return name[algorithm-1]; HI{h>g T  
} ~]#-S20  
<Y6zJ#BD  
public static void sort(int[] data, int algorithm) { MGq\\hLD\-  
impl[algorithm-1].sort(data); ]R>NmjAI  
} _BY+Tfol  
 4Y}Nu  
public static interface Sort { IdMwpru(  
public void sort(int[] data); *>"NUHq  
} %6%mf>Guf  
nW*cqM%+  
public static void swap(int[] data, int i, int j) { $)$ r  
int temp = data; ^pH8'^n  
data = data[j]; /qJCp![X  
data[j] = temp; oc]:Ty  
} Mtv{37k~  
} H3*] }=   
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