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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。 Z\~G U*Y.e  
插入排序: #`(WUn0H?  
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package org.rut.util.algorithm.support; K*q[(,9  
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import org.rut.util.algorithm.SortUtil; :w`3cw Q  
/** ZrO!L_/  
* @author treeroot *4S-z&,.c  
* @since 2006-2-2 qnM|w~G  
* @version 1.0 :`\) P,  
*/ BecP T  
public class InsertSort implements SortUtil.Sort{ :u6JjW[a)  
!z 53OT!  
/* (non-Javadoc) k|vI<:'p,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iDoDwq!l_  
*/ #*9-d/K  
public void sort(int[] data) {  7I=C+  
int temp;  J@_ctGv  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ujFzJdp3k  
} [kV;[c}  
} fpWg R4__  
} oR .cSGh  
b| M3 `  
} \25/$Ae}c  
cc}Key@D  
冒泡排序: 7a4o1;l  
&Lm-()wb  
package org.rut.util.algorithm.support; D}3T|N  
6"/WZmOp  
import org.rut.util.algorithm.SortUtil; $P z`$~  
,CvG 20>  
/** <eN_1NTH_  
* @author treeroot 'sh~,+g  
* @since 2006-2-2 o:S0*  
* @version 1.0 C NsNZJ  
*/ m8R9{LC  
public class BubbleSort implements SortUtil.Sort{ JL=U,Mr6  
H 3@Z.D  
/* (non-Javadoc) lg :  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t?c}L7ht  
*/ Rk6deI]  
public void sort(int[] data) { ({s6eqMhDd  
int temp; S4UM|`  
for(int i=0;i for(int j=data.length-1;j>i;j--){ t5B7I59  
if(data[j] SortUtil.swap(data,j,j-1); 1'.7_EQ4T  
} z~*g~RKS!  
} @"-</x3o  
} n">u mM;Eh  
} n DS}^Ba  
^y!;xc$(Qs  
} (*p , T  
]rehW}  
选择排序: sRSz}]  
\u,}vpp z  
package org.rut.util.algorithm.support; dCyqvg6u  
(8$k4`T>  
import org.rut.util.algorithm.SortUtil; 1MlUG5  
!RB)_7  
/** 6W[}$#w  
* @author treeroot IW=cym7  
* @since 2006-2-2 {n#k,b&9B  
* @version 1.0 E>b2+;Jv  
*/ 9,uhf b^]  
public class SelectionSort implements SortUtil.Sort { Vj<:GRNQ,d  
e^p +1-B  
/* N|N3x7=gs  
* (non-Javadoc) MP Z3D9  
* v ^[39*8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F{06 _T  
*/ sUZX }  
public void sort(int[] data) { [^CV>RuO  
int temp; [.se|]t7X  
for (int i = 0; i < data.length; i++) { Od+6 -J  
int lowIndex = i; [x=jH>Y  
for (int j = data.length - 1; j > i; j--) { Kl7WQg,XOi  
if (data[j] < data[lowIndex]) { PyVC}dUAX  
lowIndex = j; %^sTU4D5  
} 1"Z@Q`}  
} 4iA Z+l5&  
SortUtil.swap(data,i,lowIndex); 'c2W}$q  
} XU!2YO)t;!  
} -9N@$+T  
S/|,u`g-  
} :B3[:MpL}  
j',W 64  
Shell排序: k@zy  
*eI)Z=8  
package org.rut.util.algorithm.support; [Wd-Zn%  
]Chj T}  
import org.rut.util.algorithm.SortUtil; `&\Q +W  
X%z }VA  
/** +$4(zP s@  
* @author treeroot L,y6^J!  
* @since 2006-2-2 Z^ }mp@j>  
* @version 1.0 =q N2Xg/  
*/ s { #3r  
public class ShellSort implements SortUtil.Sort{ Uc/+gz Z;  
#/PAA  
/* (non-Javadoc) DPi_O{W>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5T sUQc  
*/ HeBcT^a  
public void sort(int[] data) { *6HTV0jv  
for(int i=data.length/2;i>2;i/=2){ COH<Tj  
for(int j=0;j insertSort(data,j,i); J>fQNW!{  
} mF` B#  
} UOQEk22  
insertSort(data,0,1); +)JpUqHa  
} h(WrL  
dJ$"l|$$  
/** ga?*DI8w  
* @param data d%l{V6  
* @param j ^u 3V E  
* @param i OL4z%mDZi  
*/ oIUy-|  
private void insertSort(int[] data, int start, int inc) { U(~+o  
int temp; &-(463  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 3u%{dGa  
} 3?Y2L  
} 9x,RvWTb  
}  >S$Z  
ss;R8:5  
} 8~5cJPi6  
a0r"N[&  
快速排序: l7&$}x -  
ECv)v  
package org.rut.util.algorithm.support; j*~T1i  
gZ5[ C  
import org.rut.util.algorithm.SortUtil; >0Q|nCx  
~]ZpA-*@Ut  
/** N !TW!  
* @author treeroot M Zmb`%BZ  
* @since 2006-2-2 d)~Fmi;  
* @version 1.0 qI^ /"k*5  
*/ n3J53| %v  
public class QuickSort implements SortUtil.Sort{ C6rg<tCH  
NcY608C  
/* (non-Javadoc) B"%{i-v>**  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AT5aDEb^^  
*/ c-.t>r &  
public void sort(int[] data) { $-[CG7VgX%  
quickSort(data,0,data.length-1); M'_9A  
} Tw +  
private void quickSort(int[] data,int i,int j){ q^6+!&"  
int pivotIndex=(i+j)/2; B]tIi^  
file://swap ve&zcSeb  
SortUtil.swap(data,pivotIndex,j); DxJX+.9K9  
'Ei;^Y 1e  
int k=partition(data,i-1,j,data[j]); fS^!ZPe1  
SortUtil.swap(data,k,j); zt^48~ry  
if((k-i)>1) quickSort(data,i,k-1); ~|<m,)!  
if((j-k)>1) quickSort(data,k+1,j); @LJpdvb  
'M3">$N  
} 610D% F  
/** WxF:~{  
* @param data aL\nT XakX  
* @param i L~s3b  
* @param j !UFfsNiXZ  
* @return 8Jz:^k:  
*/ #A]-ax?Qc}  
private int partition(int[] data, int l, int r,int pivot) { k}~O}~-  
do{ 1bGopi/  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); GguFo+YeZ  
SortUtil.swap(data,l,r);   zxp`  
} ^iQn'++Q  
while(l SortUtil.swap(data,l,r); t(="h6i  
return l; aF7nvu*N  
} *5xJv  
7'OtruJ   
} TRsE %  
ngGO0  
改进后的快速排序: F{ELSKcp.  
_'#x^D  
package org.rut.util.algorithm.support; Y@ZaJ@%9@  
xU%w=0z <  
import org.rut.util.algorithm.SortUtil; E= `6-H{  
1T:Y0  
/** 6 PxW8pn  
* @author treeroot iDf,e Kk$'  
* @since 2006-2-2 u :F~K  
* @version 1.0 O@YTAT&d#  
*/ Z{H5oUk  
public class ImprovedQuickSort implements SortUtil.Sort { 5O`dO9g}$  
Hk|0HL  
private static int MAX_STACK_SIZE=4096; $-On~u0g  
private static int THRESHOLD=10; `_&Vt=7lG  
/* (non-Javadoc) ] Eh}L  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y6&wJ<   
*/ +*_5tWAc  
public void sort(int[] data) { `SVmQSwO[  
int[] stack=new int[MAX_STACK_SIZE]; IJ/sX_k  
Ux+Q  
int top=-1; I2H6y"p N  
int pivot; ncx(pp  
int pivotIndex,l,r; T 6~_Q}6  
T7f ${  
stack[++top]=0; H OBP`lf  
stack[++top]=data.length-1; hS9;k9w  
9aJ%`i  
while(top>0){ 8iekEG$H  
int j=stack[top--]; VM0j`bs'K*  
int i=stack[top--]; ~xoF6 CF  
77Bgl4P  
pivotIndex=(i+j)/2; pFJB'=c  
pivot=data[pivotIndex]; k#5}\w!  
c5mZG7-  
SortUtil.swap(data,pivotIndex,j); U"50_O  
+d|mR9^([  
file://partition Iuh/I +[7  
l=i-1; c*R/]Dn   
r=j; ?Mee 6  
do{ 'FYJMIs  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); *s;|T?~i  
SortUtil.swap(data,l,r); O2"gj"D  
} 2./ 3 \n2  
while(l SortUtil.swap(data,l,r); O-4C+?V  
SortUtil.swap(data,l,j); r:]1 O*  
@9&P~mo/  
if((l-i)>THRESHOLD){ t3+Py7qv  
stack[++top]=i; SI8%M=P>  
stack[++top]=l-1; gsn)Wv$h  
} WAn'kA  
if((j-l)>THRESHOLD){ |c`w'W?C6  
stack[++top]=l+1; >,DbNmi  
stack[++top]=j; (L`j0kPN  
} ;m2<eS`o'  
rSYi<ku  
} BT@r!>Nl  
file://new InsertSort().sort(data); #:d =)Qj0  
insertSort(data); r$wxk 4%Rz  
} ~gu3g^<0v  
/** TB;o~>9U  
* @param data 0VK-g}"x  
*/ x\Y $+A,P  
private void insertSort(int[] data) { 5xOvY  
int temp; VAXT{s&4>  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); u_).f<mUdF  
} 6_4D9 W  
} BAO|)~1Pd  
} J sEa23  
XQ*eP?OS{  
} P<K){V  
^#0U  ?9  
归并排序: 7L^%x3-|&  
pc?>cs8  
package org.rut.util.algorithm.support; sp* Vqd  
03j]d&P%d  
import org.rut.util.algorithm.SortUtil; w eQYQrN  
MJ=)v]a  
/** V:G>G'Eh0  
* @author treeroot P<fnLQ9  
* @since 2006-2-2 Q%-di=  
* @version 1.0 rhL"i^  
*/ aC< KN:TN6  
public class MergeSort implements SortUtil.Sort{ i>_u_)-  
Vn~UB#]'3  
/* (non-Javadoc)  RD tU43  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q#IG;  
*/ nQ GQWg`  
public void sort(int[] data) { FV,4pi  
int[] temp=new int[data.length]; ,y%3mR_~  
mergeSort(data,temp,0,data.length-1); _Ob@`  
} Iz[@^IUx=  
jM:Y' l]  
private void mergeSort(int[] data,int[] temp,int l,int r){ iH.$f /)N  
int mid=(l+r)/2; 0 &GRPu27  
if(l==r) return ; {6oE0;2o'  
mergeSort(data,temp,l,mid); t&9A ]<n%,  
mergeSort(data,temp,mid+1,r); \RVW  
for(int i=l;i<=r;i++){ nbG/c80  
temp=data; x}twsc`  
} [V 8{b{  
int i1=l; q%5eVG  
int i2=mid+1; iX\W;V  
for(int cur=l;cur<=r;cur++){ eznypY=  
if(i1==mid+1) 2<hpK!R  
data[cur]=temp[i2++]; h!m_PgRSs  
else if(i2>r) mR;qMX)0h  
data[cur]=temp[i1++]; @zgdq  
else if(temp[i1] data[cur]=temp[i1++]; SwU\ q]^|Z  
else \(">K  
data[cur]=temp[i2++];  {Ha8]y  
} >><.3  
} ]QuM<ms  
=~I-]4  
} !d&C>7nb  
.SWt3|Pi5  
改进后的归并排序: 2y%,p{="  
fBQ?|~:n  
package org.rut.util.algorithm.support; >Yt/]ta4+  
Pf F=m'  
import org.rut.util.algorithm.SortUtil; ,TRTRb;  
$#|gLVOQ  
/** .%zy`n  
* @author treeroot GQ_p-/p R  
* @since 2006-2-2 \cLSf=  
* @version 1.0 0<TD/1wN  
*/ GHQ;hN:  
public class ImprovedMergeSort implements SortUtil.Sort { kPjd_8z2n  
QORN9SY  
private static final int THRESHOLD = 10; r_YIpnJ  
S!{t6'8K  
/* _sy'.Fo  
* (non-Javadoc) KFZm`,+69  
* ?b!Fa  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <|?K%FP7Z  
*/ Y4IGDY*  
public void sort(int[] data) { 5 |/9}^T  
int[] temp=new int[data.length]; ip~$X 2  
mergeSort(data,temp,0,data.length-1); KgW:@X7wvM  
} "KJ%|pg_C  
K 0hu:1l)  
private void mergeSort(int[] data, int[] temp, int l, int r) {  mA7m  
int i, j, k; 3Oa*%kP+  
int mid = (l + r) / 2; @/&b;s73  
if (l == r) ESoAz o,u  
return; {iG@U=>  
if ((mid - l) >= THRESHOLD) 3zT_^;:L  
mergeSort(data, temp, l, mid); |;A/|F0-e  
else VzJ5.mRQ  
insertSort(data, l, mid - l + 1); U4G}DCU  
if ((r - mid) > THRESHOLD) H[b}kZW:a  
mergeSort(data, temp, mid + 1, r); c)&>$S8*  
else `Bn=?9  
insertSort(data, mid + 1, r - mid); ,^8MB.  
NU (AEfF  
for (i = l; i <= mid; i++) { BGr.yEy  
temp = data; "g+z !4b#  
} @u._"/K  
for (j = 1; j <= r - mid; j++) { *1@:'rJ  
temp[r - j + 1] = data[j + mid]; { BEo &  
} eh R{X7J  
int a = temp[l]; A>VX*xd  
int b = temp[r]; .qob_dRA  
for (i = l, j = r, k = l; k <= r; k++) { E VQ0l@K  
if (a < b) { tvd0R$5}  
data[k] = temp[i++]; vEQ<A<[Z  
a = temp; g+PPW88P;  
} else { TEsnNi 1  
data[k] = temp[j--]; D7"p}PD>~  
b = temp[j]; [i]r-|_K  
} \C 5%\4  
} dd|W@Xp -  
} Iak0 [6Ey  
x7T +>  
/** 6Fy@s  
* @param data Y\v-,xPm  
* @param l @DC)]C2  
* @param i D5?phyC[Z  
*/ [@fz1{*  
private void insertSort(int[] data, int start, int len) { wNE$6  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A-CUv[pM  
} V[a[i>,Z  
} s=Q(C[%I  
} /(t sb  
} irTv4ZE'+l  
M2@^bB\J  
堆排序: _~aG|mAj  
S'B6jJK2x  
package org.rut.util.algorithm.support; xv7"WFb  
;3C:%!CdA]  
import org.rut.util.algorithm.SortUtil; ;7Oi!BC  
TFDm5XJ  
/** K t#,]]  
* @author treeroot DG;y6#|p  
* @since 2006-2-2 2>em0{e  
* @version 1.0 6k?`:QK/sl  
*/ >NV=LOO  
public class HeapSort implements SortUtil.Sort{ %~*jae!f  
P%X-@0)  
/* (non-Javadoc) oojiJ~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5(&xNT-n8  
*/ F=)eLE{W  
public void sort(int[] data) { HI&kP+,y  
MaxHeap h=new MaxHeap(); R|!B,b(  
h.init(data); xn}BB}s{t  
for(int i=0;i h.remove(); *@ED}Mj+  
System.arraycopy(h.queue,1,data,0,data.length); u}6v?!  
} w?csV8ot  
!p 8psi0  
private static class MaxHeap{ ;LJ3c7$@lf  
t^E hE  
void init(int[] data){ d`Q7"}uZ  
this.queue=new int[data.length+1]; wb"RB A9  
for(int i=0;i queue[++size]=data; > 7`&0?  
fixUp(size); f"&Xr!b.h  
} /&ygiH{^  
} }fhHXGK.  
0'$p$K  
private int size=0; 3}&ZOO   
UEzi*"-v2  
private int[] queue; ! d9AG|  
9>,Qgp,w  
public int get() { >{Rb 3Z]  
return queue[1]; &d`^ E6#  
} m(sXk}e;1  
xk~Nmb}  
public void remove() { <M[U#Q~?~e  
SortUtil.swap(queue,1,size--); $M"0BZQ?y!  
fixDown(1); O2-M1sd$  
} kReG:  
file://fixdown G5]1s  
private void fixDown(int k) { KO]N%]:&~  
int j; /c+)C"  
while ((j = k << 1) <= size) { .6T6 S v  
if (j < size %26amp;%26amp; queue[j] j++; %hT4qzJj  
if (queue[k]>queue[j]) file://不用交换 zREJ#r  
break; k ~6- cx  
SortUtil.swap(queue,j,k); 9(VRq^Z1  
k = j; BH:  
} r>qA $zD^  
} _LfHs1g4  
private void fixUp(int k) { I6OSC&A`  
while (k > 1) { CdhSp$>  
int j = k >> 1; JE%A|R<Jl  
if (queue[j]>queue[k]) ?p8k{N(1  
break; r!/0 j)  
SortUtil.swap(queue,j,k); nx4P^P C  
k = j; P0\eB S  
} {^RG% &S  
} w4MwD?i]R  
Nh)[r x  
} ekzjF\!y  
Go+[uY^  
} }_46y*o8  
I 8Y*@$h  
SortUtil: -Fwh3F 4g  
<Dw]yGK@  
package org.rut.util.algorithm; 6 `puTL?  
+ Oobb-v  
import org.rut.util.algorithm.support.BubbleSort; QXk"?yT`E  
import org.rut.util.algorithm.support.HeapSort; u2qV6/  
import org.rut.util.algorithm.support.ImprovedMergeSort; P%o44|[][  
import org.rut.util.algorithm.support.ImprovedQuickSort; c" Y!$'|Q  
import org.rut.util.algorithm.support.InsertSort; h$h]%y  
import org.rut.util.algorithm.support.MergeSort; s j9D  
import org.rut.util.algorithm.support.QuickSort; Da,&+fZI!  
import org.rut.util.algorithm.support.SelectionSort; r*cjOrvI  
import org.rut.util.algorithm.support.ShellSort; UxPGv;F  
 Q&+c.S  
/** V;[p438o  
* @author treeroot Lk(S2$)*  
* @since 2006-2-2 2bA#D%PHD  
* @version 1.0 zv%J=N$G  
*/ ZzL@[g  
public class SortUtil { E#h~V5Tf  
public final static int INSERT = 1; .Dv=p B,u  
public final static int BUBBLE = 2; 3&J&^O  
public final static int SELECTION = 3; ?6:cNdN  
public final static int SHELL = 4; Fd !iQ  
public final static int QUICK = 5; >rRf9wO1l  
public final static int IMPROVED_QUICK = 6; NV!4(_~  
public final static int MERGE = 7; Hhf72IX  
public final static int IMPROVED_MERGE = 8; Wu{&;$  
public final static int HEAP = 9; =WRO\lgv.  
3hJH(ToO  
public static void sort(int[] data) { Dt {')  
sort(data, IMPROVED_QUICK); k&DGJ5m$.  
} ;nf&c;D  
private static String[] name={ ]%XK)[:5_=  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y\_wWE  
}; -lp"#^ ;  
+2O=s<fp  
private static Sort[] impl=new Sort[]{ MuSaK %  
new InsertSort(), Es:6  
new BubbleSort(), z_(eQP])  
new SelectionSort(), /oDpgOn  
new ShellSort(), v!!;js^  
new QuickSort(), "8t\MKt(  
new ImprovedQuickSort(), J8h7e}n?  
new MergeSort(), B "n`|;r5  
new ImprovedMergeSort(), rU*q@y Px  
new HeapSort() 9UmBm#"  
}; >x?2Fz.  
\L#QR  
public static String toString(int algorithm){ }*-u$=2  
return name[algorithm-1]; 5vGioO  
} Riq|w+Q  
xK!DtRzsA  
public static void sort(int[] data, int algorithm) { C "9"{  
impl[algorithm-1].sort(data); Mryn>b`cB  
} : ~'Z(-a  
S2}Z&X(  
public static interface Sort { ZV#$Z  
public void sort(int[] data); 4@~a<P#  
} afy/K'~  
n'3u] ~7^  
public static void swap(int[] data, int i, int j) { }MjQP R  
int temp = data; O"QHb|j  
data = data[j]; SauHFl8?  
data[j] = temp; zkG>u,B}  
} 3*2I$e!Jt  
} GRQ_+K  
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