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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。 \n+`~< i  
插入排序: -FE5sW  
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package org.rut.util.algorithm.support; H(n_g QAX  
J,P7k$t2vv  
import org.rut.util.algorithm.SortUtil; (K0FWTmm  
/** KOw Ew~  
* @author treeroot C7)].vUN  
* @since 2006-2-2 l^"gpO${K  
* @version 1.0 Kd^ ._  
*/ 9J l9\y9  
public class InsertSort implements SortUtil.Sort{ G0a UZCw  
@bD,^3U  
/* (non-Javadoc) ^ "*r'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sQTW?KA-Te  
*/ NhpGa@[D  
public void sort(int[] data) { B4U+q|OD#  
int temp; !aIIjWz]  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 2BRY2EF  
} V{c n1Af  
} eQzSWn[  
} JX>_imo  
GT#iY*  
} #[Ns\%Ri0  
:) mV-(+o  
冒泡排序: t'R&$;z@b  
U'Vz   
package org.rut.util.algorithm.support; 5k<HO_]  
l|5ss{llR  
import org.rut.util.algorithm.SortUtil; *3. ]  
mlIc`GSI  
/** =`.9V<  
* @author treeroot Nu|?s-   
* @since 2006-2-2 9> [ $;>  
* @version 1.0 #J1a `}x  
*/ s}/YcUK  
public class BubbleSort implements SortUtil.Sort{ OG}0{?  
E-Cj^#OY|N  
/* (non-Javadoc) >/evL /  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ) ~ C)4  
*/ wK|&[m s  
public void sort(int[] data) { x!LUhX '  
int temp; <fN?=u+  
for(int i=0;i for(int j=data.length-1;j>i;j--){ u3"F7 lJ  
if(data[j] SortUtil.swap(data,j,j-1); s)&"g a  
} +| Cvv]Tx1  
} ioh_5 5e  
} 0'aZ*ozk  
} uXtfP?3Vy  
=C5 [75z#+  
} h:j-Xd$H+  
nD E5A  
选择排序: T>W(Caelq  
.>h|e_E  
package org.rut.util.algorithm.support; ^VoQGP/cl  
Ml0d^l}'  
import org.rut.util.algorithm.SortUtil; BKVvu}V(o  
wk)gxn1A,  
/** @Q TG  
* @author treeroot Z#^2F8,]  
* @since 2006-2-2 &W|'rA'r  
* @version 1.0 S@Jl_`<  
*/ 85Ms*[g  
public class SelectionSort implements SortUtil.Sort { Y@;bA=Du}  
/kNr5s  
/* hLJO\=0rJz  
* (non-Javadoc) *4=Fy:R]O  
* Vv6xVX  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4}#*M2wb  
*/ J& yDX>  
public void sort(int[] data) { ];j8vts&  
int temp; A\k-OP]  
for (int i = 0; i < data.length; i++) { OJ] {FI  
int lowIndex = i; n |.- :Zy  
for (int j = data.length - 1; j > i; j--) { AE^&hH0^  
if (data[j] < data[lowIndex]) { m,]Tl;f  
lowIndex = j; b%T-nY2  
} l,sYYU+iY  
} $F\&?B1.  
SortUtil.swap(data,i,lowIndex); QAcvv 0Hv  
} #`}g?6VHo  
} a?Q~C<k  
| ql!@M(p  
} vT3LhN+1  
YQe @C  
Shell排序: LOe!qt\&  
Og-M nx3  
package org.rut.util.algorithm.support; uodO^5"-  
1gH5#_ ?  
import org.rut.util.algorithm.SortUtil; %3"3OOT7  
V}@c5)(j  
/** E2%7v  
* @author treeroot H$\?D+xlf  
* @since 2006-2-2 hoSk  
* @version 1.0 QIo|t!7F  
*/ 2yeq2v   
public class ShellSort implements SortUtil.Sort{ !YAkHrF`[0  
H${Ym BG  
/* (non-Javadoc) s7df<dBC  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h'T\gF E%  
*/ UDuKG\_J<y  
public void sort(int[] data) { ; Sh|6  
for(int i=data.length/2;i>2;i/=2){ f~W.i]  
for(int j=0;j insertSort(data,j,i);  '6 w|z^  
} zCPjuS/~ Q  
} &t p5y}=n  
insertSort(data,0,1); ~x>IN1Vci  
} zz02F+H$Y  
KLA nW#  
/** | %6B#uy  
* @param data w&C SE  
* @param j =fG(K!AQ  
* @param i QZQ@C#PR;  
*/ ;|9VPv/  
private void insertSort(int[] data, int start, int inc) { o)1wF X  
int temp; q_HD`tW  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 9n9/[?S  
} QF-.")Z  
} {jlm]<:&Z  
} ?;uzx7@F  
.[K{;^>  
} @0B<b7Jv  
F~RUb&*/<  
快速排序: ~V5k  
ho^1T3  
package org.rut.util.algorithm.support; 0!+ab'3a  
dbnH#0i  
import org.rut.util.algorithm.SortUtil; <8-I:o]mF  
9x{T"'  
/** *4A.R&Vu  
* @author treeroot `Gsh<.w!7  
* @since 2006-2-2 [-Q"A 6!Zd  
* @version 1.0 9n@jK%m  
*/ P`U5kNN  
public class QuickSort implements SortUtil.Sort{ I0)iC[s8;  
X ,T^(p  
/* (non-Javadoc) li NPXS+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sM~CP zMa  
*/ +R#*eo;o7  
public void sort(int[] data) { hRc\&+#/  
quickSort(data,0,data.length-1); QZ9 )uI  
} kv`x  
private void quickSort(int[] data,int i,int j){ r!Mr\  
int pivotIndex=(i+j)/2; {n.g7S~  
file://swap HjnHl-  
SortUtil.swap(data,pivotIndex,j); /[{?zS{  
Td8'z'  
int k=partition(data,i-1,j,data[j]); t(}&<<1Bz  
SortUtil.swap(data,k,j); kC LeHH|K  
if((k-i)>1) quickSort(data,i,k-1); j|+B|   
if((j-k)>1) quickSort(data,k+1,j); r("7 X2f  
aY3kww`  
} 9f BD.9A  
/** {L<t6A  
* @param data VFG)|Z  
* @param i PB }$.8  
* @param j xbn+9b  
* @return 5'oWd e  
*/ #9 } Oqm  
private int partition(int[] data, int l, int r,int pivot) { EHo"y.ODg  
do{ NK"y@)%0  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); QRt(?96  
SortUtil.swap(data,l,r); I`5MAvP  
} 5Vut4px  
while(l SortUtil.swap(data,l,r); "q]v2t  
return l; .dM 0  
} /a9+R)Al  
TR ]lP<m  
} {9C(\i +  
v SWqOv$  
改进后的快速排序: C5XCy%h  
M~ *E!  
package org.rut.util.algorithm.support; hoU&'P8  
94K ;=5h  
import org.rut.util.algorithm.SortUtil; (y(V,kXwa8  
#Oe=G:+A  
/** oZOFZ-<  
* @author treeroot s'/.ea V_  
* @since 2006-2-2 S:^Q(w7  
* @version 1.0 ]YOQIzkL4}  
*/ BB>7%~3f  
public class ImprovedQuickSort implements SortUtil.Sort { Txp~&a03  
_VY]  
private static int MAX_STACK_SIZE=4096; %/S BJ  
private static int THRESHOLD=10; Zz/w>kAG*{  
/* (non-Javadoc) N<:Ra~Ay  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &;%+Hduc  
*/ 1b_ ->_9  
public void sort(int[] data) { z|pH>R?:  
int[] stack=new int[MAX_STACK_SIZE]; hpAIIgn  
B5tJ|3!  
int top=-1; eeL%Yp3+  
int pivot; ",~3&wx  
int pivotIndex,l,r; EE%OD~u&9#  
?$r+#'asd(  
stack[++top]=0; 3&2,[G04  
stack[++top]=data.length-1; U?>zq!C&R  
V(w[`^I>~  
while(top>0){ ^P{'l^CVX  
int j=stack[top--]; *23  
int i=stack[top--]; q)@.f.  
O`@$YXuD  
pivotIndex=(i+j)/2; EDnmYaa)dZ  
pivot=data[pivotIndex]; !)LR41>?  
zb;2xTH+  
SortUtil.swap(data,pivotIndex,j); ;q$<]X_S)}  
$xloB  
file://partition <`M Hra8  
l=i-1; >6<g5ps.n  
r=j; KP:O]520  
do{ U*6-Y%7  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); e=2;z  
SortUtil.swap(data,l,r); L^ +0K}eD  
} 75^-93  
while(l SortUtil.swap(data,l,r); jh g!K.A  
SortUtil.swap(data,l,j); mZq*o<kTA  
=8tdu B  
if((l-i)>THRESHOLD){ -u8@ .  
stack[++top]=i; ?B h}  
stack[++top]=l-1; ~t#'X8.)  
} [r]USCq  
if((j-l)>THRESHOLD){ 9Ft)VX  
stack[++top]=l+1; 59EAqz[:  
stack[++top]=j; Gg-<3z  
} ` 0\hm`  
xRaYm  
} ? 4.W _  
file://new InsertSort().sort(data); m{V @Om  
insertSort(data); .Hgiru&  
} kxf'_Nzy  
/** A:p0p^*  
* @param data VQ}=7oe%q  
*/ Z2 t0l%  
private void insertSort(int[] data) { XeZv%` ?  
int temp; ?G8 D6  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); kdoE)C   
} KNK0w5  
} ("{AY?{{  
} $s) ^zm~  
Xf#;GYO|2  
} LW2Sko?Yo  
6\E |`  
归并排序: Y %<B,3  
!XtbZ-  
package org.rut.util.algorithm.support; jMw;`yh  
(:hPT-1  
import org.rut.util.algorithm.SortUtil; Z#o o8  
.#+rH}=Z  
/** f'#7i@Je  
* @author treeroot xE0+3@_>>  
* @since 2006-2-2 @l@lE0  
* @version 1.0 UO!OO&l!  
*/ !\"C<*5  
public class MergeSort implements SortUtil.Sort{ !CsoTW9C:  
 nbOMtK  
/* (non-Javadoc) &Nec(q<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QDgOprha  
*/ _`;6'}]s  
public void sort(int[] data) { 3Um\?fj>}(  
int[] temp=new int[data.length]; o >W}1_  
mergeSort(data,temp,0,data.length-1); ?j $z[_K  
} =-vk}O0C  
"3\)@  
private void mergeSort(int[] data,int[] temp,int l,int r){ +$v$P!),  
int mid=(l+r)/2; 9VP|a-  
if(l==r) return ; |Yk23\!  
mergeSort(data,temp,l,mid); Yq2 mVo  
mergeSort(data,temp,mid+1,r); }}Q|O]e  
for(int i=l;i<=r;i++){ jh=:QP/  
temp=data; }K&K{ 9}  
} 6*]Kow?  
int i1=l; $?'z%a{  
int i2=mid+1; 778L[wYe  
for(int cur=l;cur<=r;cur++){ UQTt;RS*zS  
if(i1==mid+1) bJe^x;J9  
data[cur]=temp[i2++]; 9@:&E  
else if(i2>r) uQ&xoDCB  
data[cur]=temp[i1++]; 4q~l ?*S  
else if(temp[i1] data[cur]=temp[i1++]; %K/rPhU  
else Bp4QHv9xqL  
data[cur]=temp[i2++]; KH@M & >=^  
} us5`?XeX]  
} O'!k$iJNb  
CBO8^M<K  
} #" f:m`  
Fmsg*s7w  
改进后的归并排序: a_pkUOu6  
s+ 0$_&xR  
package org.rut.util.algorithm.support; 6?hv ,^  
 Q.cxen  
import org.rut.util.algorithm.SortUtil; FiIN \  
!H.&"~w@  
/** IOfo]p-  
* @author treeroot ~v<r\8`OI2  
* @since 2006-2-2 r_R|.fl<[  
* @version 1.0 rT"8e*LT  
*/ BD9` +9  
public class ImprovedMergeSort implements SortUtil.Sort { ;((gmg7,  
)6!SFj>.O  
private static final int THRESHOLD = 10; OBj .-jL  
 snN1  
/* g*^"x&  
* (non-Javadoc) !8P#t{2_|  
* ch< zpo:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B4J^ rzK  
*/ VS 8|lgQ  
public void sort(int[] data) {  {kmaMP  
int[] temp=new int[data.length]; )"f>cYF  
mergeSort(data,temp,0,data.length-1); Q&n|tQ*4  
} v 7Pv&|  
<H#D/?n5  
private void mergeSort(int[] data, int[] temp, int l, int r) { 'g ,Oi1|~  
int i, j, k; 44S<(Re  
int mid = (l + r) / 2; M,mj{OY~x  
if (l == r) "-I>  
return; Imv kB~8N  
if ((mid - l) >= THRESHOLD)  5+VdZ'@  
mergeSort(data, temp, l, mid); ;ATk?O4T  
else i?mDR$X:  
insertSort(data, l, mid - l + 1); 6!+"7r6  
if ((r - mid) > THRESHOLD) gS"@P:wYzs  
mergeSort(data, temp, mid + 1, r); {;z3$/JB  
else )V9$ P)  
insertSort(data, mid + 1, r - mid); d5bj$oH  
:*4yR46  
for (i = l; i <= mid; i++) { /V3*[  
temp = data; Z1q '4h=F.  
} *]F3pP[  
for (j = 1; j <= r - mid; j++) { 3>?ip;  
temp[r - j + 1] = data[j + mid]; g#Yqw  
} A0&~U0*(~  
int a = temp[l]; 9]hc{\  
int b = temp[r]; {Y\hr+A  
for (i = l, j = r, k = l; k <= r; k++) { ,`H=%#  
if (a < b) { 'jmcS0f -  
data[k] = temp[i++]; dJCu`34Y'|  
a = temp; uOZ+9x(  
} else { lr^-  
data[k] = temp[j--]; KnU"49  
b = temp[j]; EmY8AN(*  
} jixU9]  
} fzSZ>I0R  
} x}F.<`  
{V:?r  
/** qr6WSBc  
* @param data '3 |OgV  
* @param l @tp/0E?  
* @param i V1j&>-]]9*  
*/ -4X,x  
private void insertSort(int[] data, int start, int len) { \Z57UNI  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UVU}  
} ^3*gf}  
} h=)Im )  
} 6 *Q5.g  
} tF`>.=  
tT'd]  
堆排序: {feS-.Khv  
- FE)  
package org.rut.util.algorithm.support; x6F\|nb  
!.p!  
import org.rut.util.algorithm.SortUtil; @Z.Ne:*J  
iiRK3m  
/** Fbk<qQH  
* @author treeroot '8%aq8  
* @since 2006-2-2 (U-p&q>z  
* @version 1.0 hWDgMmo7  
*/ V+D "_  
public class HeapSort implements SortUtil.Sort{ >} aykz*g  
W*8D@a0 _  
/* (non-Javadoc) $\a;?>WA"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bt.W_p  
*/ =U@*adgw  
public void sort(int[] data) { {4:En;  
MaxHeap h=new MaxHeap(); #=$4U!yL  
h.init(data); a^sR?.+3  
for(int i=0;i h.remove(); F3wRHq  
System.arraycopy(h.queue,1,data,0,data.length); M2V.FYV{j>  
} *TMg.  
{\0R[+d  
private static class MaxHeap{ /:%^Vh3XF  
q^12Rj;H  
void init(int[] data){ tkJ/ h<  
this.queue=new int[data.length+1]; :  l]>nF4  
for(int i=0;i queue[++size]=data; 9|'bPOKe  
fixUp(size); VgoQz]z  
} E$Ge# M@dM  
} Y*"%;e$tg  
xD_jfAH'  
private int size=0; 2RM1-j ($  
gqe z-  
private int[] queue; Jl5<9x  
c&R .  
public int get() { .+B!mmp  
return queue[1]; Fs&m'g  
} TF3Tha]  
OFUN hbg  
public void remove() { dQizM^j  
SortUtil.swap(queue,1,size--);  H) (K  
fixDown(1); pX*mX]  
} [ BN2c  
file://fixdown <{cPa\  
private void fixDown(int k) { u1<xt1K  
int j; $_)f|\s  
while ((j = k << 1) <= size) { <[pU rJfTr  
if (j < size %26amp;%26amp; queue[j] j++; d$Mj5wN:q  
if (queue[k]>queue[j]) file://不用交换 zpa'G1v  
break; [N$@nA-d  
SortUtil.swap(queue,j,k); *nC<1.JW  
k = j; 7 s[ ATu  
} NT8%{>F`  
} gW*ee  
private void fixUp(int k) { ^?juY}rZ=|  
while (k > 1) { WUqAPN  
int j = k >> 1; VUx~Y'b  
if (queue[j]>queue[k]) +)7NWR\  
break; {0QA+[Yd&!  
SortUtil.swap(queue,j,k); WG^D$L:  
k = j; Vm6G5QwM  
} `;4P?!WG  
} \];0S4SBy  
W"+*%x  
} "5u*C#T2$  
BpZE  
} u HqPb8  
"  m<]B  
SortUtil: 6Y0k}+j|>E  
SuU,SE'TX  
package org.rut.util.algorithm; n=l>d#}$%T  
x?Doe`/6?  
import org.rut.util.algorithm.support.BubbleSort; E&P'@'Yk  
import org.rut.util.algorithm.support.HeapSort; NL 3ri7n  
import org.rut.util.algorithm.support.ImprovedMergeSort; Y&KI/]ly,L  
import org.rut.util.algorithm.support.ImprovedQuickSort; \ni?_F(Y  
import org.rut.util.algorithm.support.InsertSort; A;n3""  
import org.rut.util.algorithm.support.MergeSort; 9 o6ig>C  
import org.rut.util.algorithm.support.QuickSort; 9F)+p7VJq  
import org.rut.util.algorithm.support.SelectionSort; n#Xi Co_\  
import org.rut.util.algorithm.support.ShellSort; /) Bk r/  
DZ -5A  
/** HtB>#`'  
* @author treeroot 0]=|3-n  
* @since 2006-2-2 _Q,`Qn@|BD  
* @version 1.0 fqA\Rp6Z  
*/ j'FSd*5m  
public class SortUtil { p'fq&a+  
public final static int INSERT = 1; M_*"g>Z  
public final static int BUBBLE = 2; ec+&K?T  
public final static int SELECTION = 3; V  @8+  
public final static int SHELL = 4; p/L|;c  
public final static int QUICK = 5; ?U.+SQ  
public final static int IMPROVED_QUICK = 6; hAtf)  
public final static int MERGE = 7; 5xe} ljo  
public final static int IMPROVED_MERGE = 8; &?flH;  
public final static int HEAP = 9; , f{<  
WzZ<ZCHm  
public static void sort(int[] data) { V/"UDof  
sort(data, IMPROVED_QUICK); ^.)oQo SE  
} F8mS5oB|^  
private static String[] name={ L#mf[a@pCn  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HZC^Q7]hy  
}; fTd=}zY  
O_}R~p  
private static Sort[] impl=new Sort[]{ NovF?kh2  
new InsertSort(), "/[xak!g  
new BubbleSort(), low 0@+Q  
new SelectionSort(), >Lj0B%^EvM  
new ShellSort(), chk1tFV  
new QuickSort(), _K["qm{X_  
new ImprovedQuickSort(), -J*BY2LU3f  
new MergeSort(), dPZrX{ c  
new ImprovedMergeSort(), N Q~keN  
new HeapSort() 5e=9~].7  
}; Hy=';Ccn}  
l =~EweuM  
public static String toString(int algorithm){ 5<ZE.'O  
return name[algorithm-1]; 4FUY1p  
} }-QFMPXhG  
I^S gWC  
public static void sort(int[] data, int algorithm) { 0'q&7 MV  
impl[algorithm-1].sort(data); y,'M3GGl  
} `L# pN5  
KBJ%$OQV  
public static interface Sort { ScOiOz:Ha  
public void sort(int[] data); |8^53*f ?  
} 2GeJ\1k  
art L  
public static void swap(int[] data, int i, int j) { L kYcAY$w  
int temp = data; R5OP=Q8  
data = data[j]; r Q)?Bhf  
data[j] = temp; ZLm?8g6-  
} nk=+6r6  
} *UBukn  
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