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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。 Mcqym8,q|3  
插入排序: /XXy!=1J  
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package org.rut.util.algorithm.support; 2Z7r ZjXW  
T*qSk!  
import org.rut.util.algorithm.SortUtil; %Mr^~7nN  
/** !@9G9<NK  
* @author treeroot ,Kwtp)EX  
* @since 2006-2-2 15CKcM6  
* @version 1.0  @"L*!  
*/ $m;DwlM  
public class InsertSort implements SortUtil.Sort{ X^)v ZL?  
L[O.]2  
/* (non-Javadoc) -HUlB|Q8r  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zA*I=3E(  
*/ 3oMhsQz~z  
public void sort(int[] data) { dr]Pns9  
int temp; hYSf;cG}A  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); `l + pk%  
} 3pjK`"Nmz\  
} %SJFuw"  
} 1Y{pf]5Wx  
abkt&981K+  
} }S6"$R  
&z?:s  
冒泡排序:  _!E)a  
/Bp5^(s  
package org.rut.util.algorithm.support; ^e(*{K;8  
5?XIp6%x  
import org.rut.util.algorithm.SortUtil; o>Q=V 0?  
OtZc;c  
/** ;ji[ "b  
* @author treeroot PiF&0;  
* @since 2006-2-2 agj_l}=gO  
* @version 1.0 I:edLg1T  
*/ XY!0yAK(!  
public class BubbleSort implements SortUtil.Sort{ %IK[d#HO  
Yqb3g(0   
/* (non-Javadoc) =jkiM_<h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qgxpq{y  
*/ YK)e  
public void sort(int[] data) { ]B3f$;W  
int temp; ;P9cjfSn  
for(int i=0;i for(int j=data.length-1;j>i;j--){ @=dwvl' W  
if(data[j] SortUtil.swap(data,j,j-1); 89\DS!\x9  
} ' oS= d  
} l9#@4Os  
} @3Gr2/a  
} s_%KWkS  
E@_]L<Z  
} `]j:''K  
~ ^*;#[<  
选择排序: nj6|WJ  
.^V9XN{'a  
package org.rut.util.algorithm.support; l#fwNM/F  
tFu"h1  
import org.rut.util.algorithm.SortUtil; CJe~>4BT  
4^_'LiX3[  
/** 9qI#vHA  
* @author treeroot %JPBD]&M  
* @since 2006-2-2 XB;C~:  
* @version 1.0 $u%7]]Y^\  
*/ ^!rAT1(/_  
public class SelectionSort implements SortUtil.Sort { #}S<O_  
R?iC"s!  
/* T.pc3+B8N  
* (non-Javadoc) THY=8&x)  
* s5J?,xu  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GGez!?E%  
*/ 4x|\xg( l  
public void sort(int[] data) { 4KB>O)YNg'  
int temp; W[t0hbV w  
for (int i = 0; i < data.length; i++) { 1h#e-Oyff  
int lowIndex = i; L)X[$:  
for (int j = data.length - 1; j > i; j--) { 7~!F3WT{  
if (data[j] < data[lowIndex]) { nd,2EX<bE  
lowIndex = j; `&URd&ouJD  
} .> 5[;  
} GBYwS{4  
SortUtil.swap(data,i,lowIndex); ):7mK03J  
} U5ME`lN*`  
} vJ{aBx`VS  
h?P- :E  
} +'{d^-( (  
GUC.t7!  
Shell排序: ^T*'B-`C7X  
{'z(  
package org.rut.util.algorithm.support; |vtj0 ,[  
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import org.rut.util.algorithm.SortUtil; G_S2Q @|Q  
2Z+:^5  
/** *9tRh Rc  
* @author treeroot *;[g Ga~  
* @since 2006-2-2 (O"-6`w[  
* @version 1.0 ^NXxMC( e+  
*/  6h?)x  
public class ShellSort implements SortUtil.Sort{ +;bP.[Z  
B3&C=*y  
/* (non-Javadoc) {ep.So6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q aG8:  
*/ dy3fZ(=q^  
public void sort(int[] data) { T\w{&3ONm  
for(int i=data.length/2;i>2;i/=2){ }6!m Q  
for(int j=0;j insertSort(data,j,i); om2)Cd9~7  
} tL]T_]z  
} P (aN6)D  
insertSort(data,0,1); ;k (M4?  
} @ RP?)*8}&  
@:t2mz:^i  
/** 2 2@w:  
* @param data n;e.N:p  
* @param j sFw;P`  
* @param i [oOV@GE  
*/ a/xnf<(H  
private void insertSort(int[] data, int start, int inc) { }U@(S>,%  
int temp; 5#~E[dr  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); <-"[9 w  
} w+gPU1|(r  
} ={\9-JJhE  
} 4 }NCdGD  
Qrw:Bva)  
} b<j*;n.  
5M\bH'1  
快速排序: v]y=+* A  
|: pBk:  
package org.rut.util.algorithm.support; <&l@ ):a  
Y_/w}HB  
import org.rut.util.algorithm.SortUtil; E|y  
h-6x! 6pm  
/** Y'yGhpT~  
* @author treeroot ;%Kh~  
* @since 2006-2-2 ;]>a7o  
* @version 1.0 t8.^YTI  
*/ Bdm05}c@u  
public class QuickSort implements SortUtil.Sort{ ak\[+wQ  
^ /)%s3  
/* (non-Javadoc) L:7 kp<E  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TGGbO:s3  
*/ 4o<' fY  
public void sort(int[] data) { |?t}7V#[  
quickSort(data,0,data.length-1); {_ {zs!r  
} vngn^2  
private void quickSort(int[] data,int i,int j){ xM$AhH  
int pivotIndex=(i+j)/2; qVE <voB8  
file://swap R|[gEavFl  
SortUtil.swap(data,pivotIndex,j); gP`CQ0t  
d "25e"(~F  
int k=partition(data,i-1,j,data[j]); PAXm  
SortUtil.swap(data,k,j); :"gu=u!  
if((k-i)>1) quickSort(data,i,k-1); K_%gda|l+  
if((j-k)>1) quickSort(data,k+1,j); :kvQ3E0  
(w`j?c1  
} [I,s:mn  
/** yM*_"z!L  
* @param data Rbcu5.6  
* @param i Jk57| )/  
* @param j T@d4NF#  
* @return bzh:  
*/ )!Zm*(  
private int partition(int[] data, int l, int r,int pivot) { 0zE(:K  
do{ Iz8gZ:rd0  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 2E0oLl[  
SortUtil.swap(data,l,r); a1z*Z/!5  
} 3x)jab  
while(l SortUtil.swap(data,l,r); D!mx&O9  
return l; yT[)V[}  
} ,6aF~p;wI|  
[y"Yi PK  
} 0E#?H0<OeG  
cUTG! P\R  
改进后的快速排序: " f.9u  
yC7lR#N8j0  
package org.rut.util.algorithm.support; u5tUm  
nnCz!:9p  
import org.rut.util.algorithm.SortUtil; RO| }WD)  
+|qw>1J(  
/** Z  GrDa  
* @author treeroot 6S^JmYq  
* @since 2006-2-2 :XB^IyO-A  
* @version 1.0 }$#PIyz  
*/ H__'K/nH+  
public class ImprovedQuickSort implements SortUtil.Sort { 1cD  
~)*uJ wW/a  
private static int MAX_STACK_SIZE=4096; ] -%B4lT  
private static int THRESHOLD=10; ;&XC*R+  
/* (non-Javadoc) i<*W,D6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) meZZQ:eSl  
*/ KgXu x-q  
public void sort(int[] data) { k0,]2R  
int[] stack=new int[MAX_STACK_SIZE]; ;_m; :<  
jXIVR'n(  
int top=-1; { T?1v*.[  
int pivot; 8zQN[[#n  
int pivotIndex,l,r; Li9>RY+3  
;<#=|eD2  
stack[++top]=0; 0a:@DOzT  
stack[++top]=data.length-1; ]>[ 0DX]j  
j+Q+.39s-~  
while(top>0){ XQZiJ %'  
int j=stack[top--]; c| X }[  
int i=stack[top--]; =oTj3+7  
fDAT#nlyp  
pivotIndex=(i+j)/2; 6ipQx/IQ  
pivot=data[pivotIndex]; V6_~"pRR=  
L&&AK`Ur3l  
SortUtil.swap(data,pivotIndex,j); <GSp%r  
_+}f@&"  
file://partition 9>;CvR  
l=i-1; &t}6sD9o  
r=j; &}d5'IRT  
do{ Y)7\h:LIg  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); I2z6iT4nB  
SortUtil.swap(data,l,r); $?u LFD  
} oG c9 6B%  
while(l SortUtil.swap(data,l,r); WQMoAPfqL  
SortUtil.swap(data,l,j); <4TF ]5  
b?:?"   
if((l-i)>THRESHOLD){ R,8T t!n  
stack[++top]=i; PsBLAr\ah  
stack[++top]=l-1; u24XuSe$  
} -_bDbYL  
if((j-l)>THRESHOLD){ .dj}y jd]f  
stack[++top]=l+1; m`n#Q#6  
stack[++top]=j; oWq]\yT<`  
} UTqKL*p523  
r`e6B!p  
} ?=b#H6vs  
file://new InsertSort().sort(data); )NO ,G  
insertSort(data); J7@Q;gcl:  
} d3NER}f4V  
/** Qjmo{'d  
* @param data z pg512\y  
*/ {FR+a**  
private void insertSort(int[] data) { _o==  
int temp; TWdhl9Ot  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Tn?D~?a*O  
} u/%Z0`X  
} a\KM^jrCD  
} cCcJOhk|d  
NT{ 'BJ  
} izLB4pk$  
[XkWPx`  
归并排序: S~M/!Xb  
ps*iE=D  
package org.rut.util.algorithm.support; umt(e:3f5  
BwVq:)P/R  
import org.rut.util.algorithm.SortUtil; vd/BO  
8L[\(~Zf  
/** #4V->I  
* @author treeroot 7A{Z1[7  
* @since 2006-2-2 seb/rxb  
* @version 1.0 HBA|NV3.  
*/ sn+ kFvk}S  
public class MergeSort implements SortUtil.Sort{ o;>qsn8  
+ZkJ{r0,(  
/* (non-Javadoc) w I[Hoi V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nhtc^DX  
*/ WLH ;{  
public void sort(int[] data) {  ~;uU{TT  
int[] temp=new int[data.length]; B^.:dn  
mergeSort(data,temp,0,data.length-1); }S{VR(i`J  
} lYU?j|n  
df/7u}>9  
private void mergeSort(int[] data,int[] temp,int l,int r){ zUWeOR'X  
int mid=(l+r)/2; nLR   
if(l==r) return ; % @!hf!  
mergeSort(data,temp,l,mid); h<7@3Ur  
mergeSort(data,temp,mid+1,r); zr wzI+4  
for(int i=l;i<=r;i++){ zuF]E+  
temp=data; lU`t~|>r+  
} ,M :j5  
int i1=l; <&HHo>rl  
int i2=mid+1; ]+>Kl>@  
for(int cur=l;cur<=r;cur++){ 0CI\Yd=  
if(i1==mid+1) xu@xP5GB^  
data[cur]=temp[i2++]; WA5.qw  
else if(i2>r) #-l+c u{  
data[cur]=temp[i1++]; =[0| qGzg  
else if(temp[i1] data[cur]=temp[i1++]; #;h> x  
else ]2_=(N\Kt  
data[cur]=temp[i2++]; Q)5V3Q]@^  
} TXqtE("BDl  
} !E^\)=E)P  
XE#$|Z  
} ycf)*0k  
)U{\c2b  
改进后的归并排序: P.djR)YI  
JO~62='J  
package org.rut.util.algorithm.support; | NyANsI  
<slrzc_>&  
import org.rut.util.algorithm.SortUtil; '@1C$0tx  
sVe<l mL  
/** 34L1Gxf  
* @author treeroot .]N`]3$=  
* @since 2006-2-2 "O_)~u  
* @version 1.0 0iKAg  
*/ 3~Ll<8fv  
public class ImprovedMergeSort implements SortUtil.Sort { \T?6TDZ]  
l!:L<B  
private static final int THRESHOLD = 10; H>%L@Btw  
ED>P>Gg  
/* 'Jd*r(2d  
* (non-Javadoc) kpMo7n  
* .u]d5z BR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v=DC3oh-  
*/ u R]8ZT")  
public void sort(int[] data) { P!lfk:M^;  
int[] temp=new int[data.length]; T>, [V:  
mergeSort(data,temp,0,data.length-1); S$4 6YQ  
} V/RV,K1/  
9}+X#ma.Nc  
private void mergeSort(int[] data, int[] temp, int l, int r) { 27MwZz  
int i, j, k; bnH:|-?q  
int mid = (l + r) / 2; |<%v`*  
if (l == r) }taG/kE62  
return; 7@&kPh}PG  
if ((mid - l) >= THRESHOLD) ^_BjO(b'e  
mergeSort(data, temp, l, mid); A>)Ced!  
else RQ4+EW 1G  
insertSort(data, l, mid - l + 1); 8YQ7XB  
if ((r - mid) > THRESHOLD) `chD*@76I  
mergeSort(data, temp, mid + 1, r); =&m;5R  
else [EK@f,iM  
insertSort(data, mid + 1, r - mid); ER;\Aes*?  
@Thrizh  
for (i = l; i <= mid; i++) { Q'YakEv >=  
temp = data; hfg ^z5  
}  u5Mg  
for (j = 1; j <= r - mid; j++) { uvi&! )x  
temp[r - j + 1] = data[j + mid]; T/:6Z  
} H(Y1%@  
int a = temp[l]; T=CJUla  
int b = temp[r]; %eGI]!vf  
for (i = l, j = r, k = l; k <= r; k++) { ? U =Mdw  
if (a < b) { >?.jN|  
data[k] = temp[i++]; Lz!H@)-mr  
a = temp; h+Y>\Cxg  
} else { 2SlI5+u  
data[k] = temp[j--]; N$u: !  
b = temp[j]; 1?G%&X@ X  
} MjK<n[.  
} 4~2 9,  
} t_+owiF)M  
B_RF)meux  
/** &ViK9  
* @param data fZQ2<*)pqO  
* @param l Z6&bUZF$bE  
* @param i cH707?p/I  
*/ O^_CqT%  
private void insertSort(int[] data, int start, int len) {  j}w  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^FZ9q  
} +^%)QH>9   
} KL"_h`UW  
} 6q,CEm  
} (px3o'lsh  
AYDAt5K_  
堆排序: OHv9|&Tpl  
V6B[eV$D  
package org.rut.util.algorithm.support; %g69kizoWi  
8Nx fYA  
import org.rut.util.algorithm.SortUtil; ]$Q@4=fb  
@X P_~ N  
/** I:1Pz|$`  
* @author treeroot xpI8QV$#  
* @since 2006-2-2 qHPinxewx  
* @version 1.0 (3=bKcD'  
*/ y( UWh4?t  
public class HeapSort implements SortUtil.Sort{ E:[!)UG|y  
!e+Sa{X  
/* (non-Javadoc) M~)iiKw~MY  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W{1l?Wo  
*/ 7| `_5e  
public void sort(int[] data) { +-rSO"nc  
MaxHeap h=new MaxHeap(); V0n8fez b  
h.init(data); $QwzL/a  
for(int i=0;i h.remove(); O2xqNQ`d  
System.arraycopy(h.queue,1,data,0,data.length); ;u<F,o(  
} Swgvj(y;!A  
V7vojm4 O  
private static class MaxHeap{ ] #7baZ  
w:](F^<s,  
void init(int[] data){ v~0lZe  
this.queue=new int[data.length+1]; 5@n|uJA  
for(int i=0;i queue[++size]=data; Q8_5g$X\  
fixUp(size); u++a0>N  
} #A:^XAU1Z@  
} F4:5 >*:  
*2/6fhI[p  
private int size=0; "B9zQ,[Q  
]deO\mB  
private int[] queue; OaY]}4tI$  
3TN'1D ei  
public int get() { Jg$ NYs.xZ  
return queue[1]; TN/&^/  
} /K;AbE  
M&e=LV  
public void remove() { 21] K7  
SortUtil.swap(queue,1,size--); i%MR<M  
fixDown(1); DmZ_tuVI  
} lq?N>~PG  
file://fixdown J ayax]u7J  
private void fixDown(int k) { :u2tu60&MJ  
int j; [a.(0YLr'w  
while ((j = k << 1) <= size) { YVk +zt~S  
if (j < size %26amp;%26amp; queue[j] j++; sosIu  
if (queue[k]>queue[j]) file://不用交换 .!'rI7Kz'i  
break; Kr`.q:0GK  
SortUtil.swap(queue,j,k); ca[*#xiJ  
k = j; VeH%E.:  
} .5tXwxad"  
} W k"_lJ  
private void fixUp(int k) { |aj]]l[@S  
while (k > 1) { H~:g =Zw  
int j = k >> 1; V'9OGn2v  
if (queue[j]>queue[k]) j`_Z`eG  
break; e.(RhajB  
SortUtil.swap(queue,j,k); ~8'HX*B]z  
k = j; |1Nz8Vr.  
} ^5+7D1>W%  
} iphdJZ/f  
%v^qQWy=*  
} k"cKxzB  
G$~hAZ  
} Y"dTm;&  
k1LbWR1%wB  
SortUtil: hJX;/~L  
#t VGqf  
package org.rut.util.algorithm; 9gZS )MZ  
!_?HSDAj"n  
import org.rut.util.algorithm.support.BubbleSort; X*e:MRw[  
import org.rut.util.algorithm.support.HeapSort; ) urUa E  
import org.rut.util.algorithm.support.ImprovedMergeSort; :]* =f].  
import org.rut.util.algorithm.support.ImprovedQuickSort; o+\?E.%%g  
import org.rut.util.algorithm.support.InsertSort; 9~ifST \  
import org.rut.util.algorithm.support.MergeSort; W7 +Q&4Y  
import org.rut.util.algorithm.support.QuickSort; Z#K0a'  
import org.rut.util.algorithm.support.SelectionSort; Mi`t$hmP  
import org.rut.util.algorithm.support.ShellSort; _HAr0R8BY  
ke'OT>8  
/** g}vU*g ;  
* @author treeroot wD@ wOC  
* @since 2006-2-2 $:?=A5ttuo  
* @version 1.0 %F<3_#Y  
*/ t'C9;  
public class SortUtil { N9z!-y'X  
public final static int INSERT = 1; K81&BVx/  
public final static int BUBBLE = 2; + Cq&~<B  
public final static int SELECTION = 3; eqpnh^0}d  
public final static int SHELL = 4; l%`~aVGJ  
public final static int QUICK = 5; |~=4Z rcCP  
public final static int IMPROVED_QUICK = 6; UQtG<W]<  
public final static int MERGE = 7; d"+ _`d=`  
public final static int IMPROVED_MERGE = 8; vY,]f^F"  
public final static int HEAP = 9; Tn$| Xa+:s  
NE Z ]%  
public static void sort(int[] data) { k7z{q/]M  
sort(data, IMPROVED_QUICK); 4Q\~l(  
} n>%TIoY  
private static String[] name={ eT8h:+k  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,qhv(  
}; 24Htr/lPCT  
S_Vquw(+  
private static Sort[] impl=new Sort[]{ _3gF~qr  
new InsertSort(), dW#l3_'3T  
new BubbleSort(), @Tsdgx8  
new SelectionSort(), tgu fU  
new ShellSort(), EtcXzq>w  
new QuickSort(), %5 <t3 H"  
new ImprovedQuickSort(), ?QzN\f Y;  
new MergeSort(), ~ o5h}OU"  
new ImprovedMergeSort(), `]<~lf  
new HeapSort() E8We2T[^M  
}; |U="B4  
td2bL4  
public static String toString(int algorithm){ q -^Z=,<  
return name[algorithm-1]; }5"19 Go?  
} T9gQq 7(l  
zx5t gZd,N  
public static void sort(int[] data, int algorithm) { m RtE~~p  
impl[algorithm-1].sort(data); 8SMa5a{  
} oc&yz>%q  
@wXo{p@W  
public static interface Sort { ?^: xNRE$j  
public void sort(int[] data); `ln= D$  
} pB,@<\l %  
iS28p  
public static void swap(int[] data, int i, int j) { }5ONDg(I~  
int temp = data; N_E :?Jo  
data = data[j]; {7FD-Q[tS  
data[j] = temp; ~Q 1%DV.  
} Pe7% 9  
} q.RW_t~  
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