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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。 emK*g<]  
插入排序: z+{qQ!  
fx[&"$X  
package org.rut.util.algorithm.support; 1BZ##xV*:G  
3Z=yCec]  
import org.rut.util.algorithm.SortUtil; ;p`to"6IFD  
/** Zd>sdS`#r  
* @author treeroot QOSMV#Nw%  
* @since 2006-2-2 AJxN9[Z!N  
* @version 1.0 }9fch9>Zr  
*/ )&d=2M;3  
public class InsertSort implements SortUtil.Sort{ nW7: ]  
bS r"k  
/* (non-Javadoc) j9h fW'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A@)Q-V8*9s  
*/ ['.])  
public void sort(int[] data) { 1ruI++P  
int temp; aSX4~UYB=  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); i#t-p\Tcz  
} )Ak#1w&q  
} Babzrt-  
} nH6SA1$kW  
Sq ]gU  
} BO w[*hM  
a(]&H "  
冒泡排序: pka^7OWyN  
~1wt=Ln>  
package org.rut.util.algorithm.support; 4A6Y \ZXI  
sA| SOAn  
import org.rut.util.algorithm.SortUtil; fJc(  
;'8P/a$  
/** d\]KG(T  
* @author treeroot @ztT1?!e  
* @since 2006-2-2 S3Gr}N  
* @version 1.0 eTvjo(Lvx  
*/ ZZI} Ot{  
public class BubbleSort implements SortUtil.Sort{ ocZ}RI#Q  
?%hd3zc+f  
/* (non-Javadoc) #xGP|:m  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N'WTIM3W  
*/ vHcl7=)Q  
public void sort(int[] data) { !6=;dX  
int temp; &|GH@^)@  
for(int i=0;i for(int j=data.length-1;j>i;j--){ M=pQx$%a  
if(data[j] SortUtil.swap(data,j,j-1); S W%>8  
} bXF8V  
} O@a OKk  
} &'W7-Z\j-  
} BN CM{}e  
'`k7l7I[@  
} 3Z9Yzv)A  
92<+ug=  
选择排序: ;P)oKx  
JP<j4/  
package org.rut.util.algorithm.support; fGlvum  
v9:J 55x  
import org.rut.util.algorithm.SortUtil; 20|_wAA5  
!<:Cd(bM  
/** +?U[362>  
* @author treeroot %"Um8`]FVg  
* @since 2006-2-2 63=&??4  
* @version 1.0 )H W   
*/ m 1; Htw  
public class SelectionSort implements SortUtil.Sort { 8fP2qj0  
k4LrUd  
/* }vZf&ib-   
* (non-Javadoc) -J+1V{  
* q=5aHH% |  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ";rXCH.  
*/ ) Su>8f[?e  
public void sort(int[] data) { 94#,dA,M  
int temp; qP#LJPaS  
for (int i = 0; i < data.length; i++) { ~Yk^(hl2  
int lowIndex = i; !\R5/-_UU  
for (int j = data.length - 1; j > i; j--) { F,~BhKkbV  
if (data[j] < data[lowIndex]) { Az:~|P  
lowIndex = j; %lnkD5  
} zU&Iy_Ke.  
} q@bye4Ry%W  
SortUtil.swap(data,i,lowIndex); 'fU#v`i  
} p-.kBF  
} GuR^L@+ -.  
PzSL E>Q  
} {TNORbZz  
_`? cBu`  
Shell排序: 1*hEbO  
_dd! nU\A|  
package org.rut.util.algorithm.support; .>R`#@+I  
8)9-*Bzj   
import org.rut.util.algorithm.SortUtil; TS6xF?  
.4%z$(+6  
/** 3(V0,L'1  
* @author treeroot )mm0PJF~q  
* @since 2006-2-2 yor'"6)i  
* @version 1.0 "D.<~!  
*/ K^fs #7  
public class ShellSort implements SortUtil.Sort{ hO8xH +;  
1<_][u@  
/* (non-Javadoc) 1(BLdP3&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /io06)-/n  
*/  N~$>| gn  
public void sort(int[] data) { Y`j$7!j  
for(int i=data.length/2;i>2;i/=2){ d9S/_iCI  
for(int j=0;j insertSort(data,j,i); ny13+Q`^  
} g8MW6Y  
} X|{Tljn  
insertSort(data,0,1); )]C]KB  
}  aO<7a 6  
CHKhJ v3+4  
/** 8C*@d_=q  
* @param data .ifz9 jM'  
* @param j NuR7pjNMZ  
* @param i :38{YCN  
*/  `qs,V  
private void insertSort(int[] data, int start, int inc) { I+kAy;2  
int temp; S~aWun  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); {OPEW`F  
} B3ItZojAuw  
} PSq?8.  
} /";tkad^  
p}!i_P  
} e1W9"&4>G{  
]`$yY5&W0  
快速排序: o:QL%J{[  
:%sBY0 yF  
package org.rut.util.algorithm.support; h}SZ+G/L  
>S:(BJMo  
import org.rut.util.algorithm.SortUtil; gDU!dT  
@lj|  
/** `qhT  
* @author treeroot LMoZI0)x  
* @since 2006-2-2 zr?s5RS  
* @version 1.0 EF :g0$  
*/ !j'LZ7  
public class QuickSort implements SortUtil.Sort{ 5T#v &  
9DA |;|  
/* (non-Javadoc) ?]D&D:Z?I  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <CuUwv 'A  
*/ iUcX\ uW  
public void sort(int[] data) { 7/~=[#]*  
quickSort(data,0,data.length-1); iG54 +]  
} KUU {X~w  
private void quickSort(int[] data,int i,int j){ b+qd' ,.Z  
int pivotIndex=(i+j)/2; DehjV6t  
file://swap ^~V2xCu!  
SortUtil.swap(data,pivotIndex,j); Ds(Z.  
KuJ9bn{u!C  
int k=partition(data,i-1,j,data[j]); UPGUJ>2Z  
SortUtil.swap(data,k,j); As46:<!2  
if((k-i)>1) quickSort(data,i,k-1); <w^u^)iLy1  
if((j-k)>1) quickSort(data,k+1,j); -O$vJ,*  
H};1>G4  
} f9K7^qwkiz  
/** VrRF2(Kn?  
* @param data zF`a:dD$d  
* @param i 6Pl|FI JF  
* @param j VVSt,/SO  
* @return flPS+  
*/ hYzP6?K"  
private int partition(int[] data, int l, int r,int pivot) { >Gpq{Ph[  
do{ x$-kw{N  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); -/?)0E  
SortUtil.swap(data,l,r); gNW+Dq|X%  
} q~9-A+n  
while(l SortUtil.swap(data,l,r); kV1L.Xg  
return l; 5vLXMdN  
} ~Fh+y+g?  
+ytP5K7  
} F62 uDyY  
RWR{jM]V  
改进后的快速排序: :-jbIpj'  
H14Q-2U1xa  
package org.rut.util.algorithm.support; OS#aYER~/  
>G|RVB  
import org.rut.util.algorithm.SortUtil; B$rhsK%  
y\_+,G0  
/** FcM)v"bF&]  
* @author treeroot =.8n K y  
* @since 2006-2-2 gra6&&^"  
* @version 1.0 ;j1 SSHZ  
*/ `D%i`"~Lf&  
public class ImprovedQuickSort implements SortUtil.Sort { I^A>YJW  
ZXs,TaU  
private static int MAX_STACK_SIZE=4096; crv#IC2  
private static int THRESHOLD=10; .;7V]B1o  
/* (non-Javadoc) GU> j8.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :7LA/j  
*/ m?Y-1!E0  
public void sort(int[] data) { 8/>.g.]  
int[] stack=new int[MAX_STACK_SIZE]; EY"of[p  
zp8x/,gwF  
int top=-1; 0+iRgnd9?  
int pivot; #,z-Pj?O!  
int pivotIndex,l,r; &V*MNi,4Z  
mQ`atFz:Z  
stack[++top]=0; 8zHx$g  
stack[++top]=data.length-1; v K{2  
t,De/L  
while(top>0){ H (;@7dh  
int j=stack[top--]; $!wU [/k  
int i=stack[top--]; W<)nC_$  
-sA&1n"W&5  
pivotIndex=(i+j)/2; O=bkq}  
pivot=data[pivotIndex]; 2gO@   
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SortUtil.swap(data,pivotIndex,j); !$l<'K$  
Brxnl,%\  
file://partition 3T.V*&  
l=i-1; 4)e1K/PJ)  
r=j; Fb1<Ic#  
do{ 82,^Pu  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); RTlC]`IGT  
SortUtil.swap(data,l,r); 9 RDs`>v  
} 8F>9CO:&N  
while(l SortUtil.swap(data,l,r); ?{'_4n3O  
SortUtil.swap(data,l,j); T`@brL  
7NRa&W2  
if((l-i)>THRESHOLD){ Zocuc"j  
stack[++top]=i; #EUT"^:d  
stack[++top]=l-1; 3\RD %[}  
} ;O)*!yA(GG  
if((j-l)>THRESHOLD){ @>(JC]HtR  
stack[++top]=l+1; kAp#6->(q  
stack[++top]=j; v CsE|eMP  
} xKE=$SV(  
!B Pm{_C  
} :2xGfy??  
file://new InsertSort().sort(data); i45.2,  
insertSort(data); X[h{g`  
} })] iN "  
/** g5+m]3#t  
* @param data g8E5"jpXx3  
*/ a^LckHPI>  
private void insertSort(int[] data) { @#hQ0F8  
int temp; %'WC7s  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); qery|0W  
} Vf:.C|Z  
} 1p~ORQ  
} ^@/wXj:  
nmn/4>  
}  GpTZp#~;  
.$p eq  
归并排序: >dK0&+A  
G.O;[(3ab  
package org.rut.util.algorithm.support; n eu<zSS  
Q^va +O  
import org.rut.util.algorithm.SortUtil; uq[5 om"  
l@SV!keQ  
/** 0#Gm# =F  
* @author treeroot |e!Y C iU  
* @since 2006-2-2 #tg\ bb  
* @version 1.0 OMk3\FV2Z  
*/ ^|oI^"I Q=  
public class MergeSort implements SortUtil.Sort{ Y.I~.66s  
rr,A Vw  
/* (non-Javadoc) ;iYCeL(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .BxQF  
*/ 3}V (8  
public void sort(int[] data) { <;#gcF[7>  
int[] temp=new int[data.length]; +fY@q ,`  
mergeSort(data,temp,0,data.length-1); Kh4rl)L*+%  
} *PlKl_nP6  
:j~4mb?$  
private void mergeSort(int[] data,int[] temp,int l,int r){ ;Egl8Vhr  
int mid=(l+r)/2; 8aHE=x/TL  
if(l==r) return ; ^! h3#4  
mergeSort(data,temp,l,mid); Kn$t_7AF^  
mergeSort(data,temp,mid+1,r); ?`Z:vqp>Z  
for(int i=l;i<=r;i++){ {Pe&J2 +  
temp=data; 7_3 PM 3C  
} M^\`~{*T  
int i1=l; !L;_f'\)6  
int i2=mid+1; vG6*[c8  
for(int cur=l;cur<=r;cur++){ i{N?Y0YQs0  
if(i1==mid+1) A-B>VX  
data[cur]=temp[i2++]; mI<sf?.  
else if(i2>r) n}Eu^^d  
data[cur]=temp[i1++]; 2?LPr  
else if(temp[i1] data[cur]=temp[i1++]; TT9 \m=7  
else k;<@ 2C  
data[cur]=temp[i2++]; g:~q&b[q6  
} bHm/ZZx  
} kK4+K74B  
%n6<6t`$  
} @VHstjos^V  
VWt=9D;  
改进后的归并排序: |g \ _xl  
NApy(e 5%  
package org.rut.util.algorithm.support; IHCxM|/k(M  
19[oXyFI  
import org.rut.util.algorithm.SortUtil; _l] 0V g`  
D]fgBW-  
/** a{e 2*V  
* @author treeroot fz VN;h  
* @since 2006-2-2 o3Yb2Nw  
* @version 1.0 )%p46(]  
*/ H(Wiy@cJn  
public class ImprovedMergeSort implements SortUtil.Sort { \s)$AF  
X! 6dg.n5  
private static final int THRESHOLD = 10; j0oto6z~b  
8 [,R4@  
/* euV!U}Xr  
* (non-Javadoc) A`~?2LH,~F  
* (qR;6l  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vq9O|E3  
*/ IDpLf*vSG  
public void sort(int[] data) { `K@N\VM  
int[] temp=new int[data.length]; %j@/Tx/  
mergeSort(data,temp,0,data.length-1); m4uh<;C~  
} P()n=&XO6  
%L)QTv/  
private void mergeSort(int[] data, int[] temp, int l, int r) { BE&8E\w  
int i, j, k; )mAD<y+  
int mid = (l + r) / 2; JgHYuLB  
if (l == r) 6)=;cc{Vr  
return; 6NyUGGRq  
if ((mid - l) >= THRESHOLD) O%bltNEx1  
mergeSort(data, temp, l, mid); vMX\q  
else ~ m vv :u  
insertSort(data, l, mid - l + 1); n(LO`{  
if ((r - mid) > THRESHOLD) [vuikJP>1k  
mergeSort(data, temp, mid + 1, r); _qOynW  
else H/ ejO_{  
insertSort(data, mid + 1, r - mid); }jce5E  
!Q_Kil.9  
for (i = l; i <= mid; i++) { \I6F;G6  
temp = data; I4ZbMnO  
} .L^j:2(L  
for (j = 1; j <= r - mid; j++) { s!D?%  
temp[r - j + 1] = data[j + mid]; w(S&X"~  
} `'r~3kP*NT  
int a = temp[l]; 7)O+s/.P)  
int b = temp[r]; p]~PyzG!  
for (i = l, j = r, k = l; k <= r; k++) { Hsov0  
if (a < b) { KCbOO8cQS  
data[k] = temp[i++]; ('uUf!h?\  
a = temp; `tT7&*Os  
} else { l{?9R.L  
data[k] = temp[j--]; |'o<w ]hc  
b = temp[j]; GU1cMe  
} mW[w4J+7P  
} Ap"%%D^{:  
} Q;y4yJ$wI  
U4Y)Jk  
/** %< ;u JP K  
* @param data vKPLh   
* @param l <WmjjD  
* @param i .MDSP/s  
*/ ['>r tV  
private void insertSort(int[] data, int start, int len) { Zs0;92WL  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pwSkwJ]  
} 3 AP=  
} Yc)Dx3  
} DuAix)#FN9  
} pnuwj U-  
N5#j}tT  
堆排序: ,G?Kb#  
P A*U\  
package org.rut.util.algorithm.support; xf8e"mD  
,0nrSJED  
import org.rut.util.algorithm.SortUtil; 6r%i=z  
3*7klu  
/** c":2<:D&  
* @author treeroot .W;cz8te  
* @since 2006-2-2  RZqMpW  
* @version 1.0 Xa"I  
*/ )VG>6x  
public class HeapSort implements SortUtil.Sort{ _~>WAm<  
}a UQ#x  
/* (non-Javadoc) 6&LmR75C  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XdlA)0S)  
*/ +g1+,?cU  
public void sort(int[] data) { >#T?]5Z'MF  
MaxHeap h=new MaxHeap(); (bNoe(<qU  
h.init(data); 8OS^3JS3"  
for(int i=0;i h.remove(); _\@zq*E  
System.arraycopy(h.queue,1,data,0,data.length); ,N_V(Cx5pt  
} wLfH/J  
!w!k0z]  
private static class MaxHeap{ % bdBg  
_D+J3d(Pjk  
void init(int[] data){ !iX/Ni:  
this.queue=new int[data.length+1]; \|]+sQWQ  
for(int i=0;i queue[++size]=data; #+h#b%8  
fixUp(size); Mbly-l{|  
} D#Mz#\4o  
} <O-R  
Y@Ry oJ  
private int size=0; t!FC)iY  
.UN?Ak*R  
private int[] queue; ^x( s !4d]  
I&^hG\D  
public int get() {  l]   
return queue[1]; X*Q<REDB  
} `6NcE-oJ  
EuVA"~PA  
public void remove() { Sq2 8=1%  
SortUtil.swap(queue,1,size--); ?d3<GhzlR3  
fixDown(1); &u<%%b|  
} d,'gh4C  
file://fixdown R$eEW"]  
private void fixDown(int k) { Q!AGalP z  
int j; (v0Q.Q@ <  
while ((j = k << 1) <= size) { ]-+l.gVFW  
if (j < size %26amp;%26amp; queue[j] j++; k0b6X5  
if (queue[k]>queue[j]) file://不用交换 /;y`6WG%2  
break; NOAz"m+o  
SortUtil.swap(queue,j,k); ( Y Z2&  
k = j; S,Qa\\~z  
} -" r4  
} GbkDs-  
private void fixUp(int k) { 1p-<F3;  
while (k > 1) { qckRX+P`  
int j = k >> 1; (II#9 n)  
if (queue[j]>queue[k]) Z;dR :|%)  
break; (enOj0  
SortUtil.swap(queue,j,k); %bG\  
k = j; an Kflt3  
} Xoq -  
} !,J] 5$M  
9m"EY@-  
} urL@SeV+$  
Cf v1nU W  
} EyV5FWb58  
&-vHb   
SortUtil: YQ1rS X3  
%r(qQM.Pl  
package org.rut.util.algorithm; SapVS*yx@  
vZqW,GDfXo  
import org.rut.util.algorithm.support.BubbleSort; ;jKLB^4nX  
import org.rut.util.algorithm.support.HeapSort; fNrpYR X  
import org.rut.util.algorithm.support.ImprovedMergeSort; Psf{~ (Ii  
import org.rut.util.algorithm.support.ImprovedQuickSort; zCS }i_ p  
import org.rut.util.algorithm.support.InsertSort; lm{4x~y$h  
import org.rut.util.algorithm.support.MergeSort; VEL!-e^X&  
import org.rut.util.algorithm.support.QuickSort; .\ vrBf  
import org.rut.util.algorithm.support.SelectionSort; je>mAQKi\  
import org.rut.util.algorithm.support.ShellSort; G}]'}FUp  
[xdVuL;N  
/** +mO/9m  
* @author treeroot M@pF[J/  
* @since 2006-2-2 "SC]G22  
* @version 1.0 7PO]\X^(zE  
*/ <c,iu{:  
public class SortUtil { 6>'>BamX  
public final static int INSERT = 1; UnZc9 6  
public final static int BUBBLE = 2; W yP]]I.  
public final static int SELECTION = 3; (r1"!~d@  
public final static int SHELL = 4; SEM- t   
public final static int QUICK = 5; Pn ?gB}l  
public final static int IMPROVED_QUICK = 6; }JUc!cH8z  
public final static int MERGE = 7; ,OkI0[  
public final static int IMPROVED_MERGE = 8; ki ?V eFp  
public final static int HEAP = 9; !|J2o8g  
lI9|"^n7F  
public static void sort(int[] data) { ZV-Yq !|t  
sort(data, IMPROVED_QUICK); ,L\KS^>  
} +\.0Pr  
private static String[] name={ '^'PdB  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?uF3Q)rCk  
}; R@IwmJxX  
c48I-{?  
private static Sort[] impl=new Sort[]{ D3+<16[,  
new InsertSort(), +}f}!h;  
new BubbleSort(), h;OHpvk  
new SelectionSort(), T!1XL7  
new ShellSort(), 1CUI6@Cz)  
new QuickSort(), >GDf* ox[  
new ImprovedQuickSort(), vU#>3[aC  
new MergeSort(), E6?0/"  
new ImprovedMergeSort(), a{.-qp  
new HeapSort() }C JK9*Z  
}; 0/~{,  
oSO~72  
public static String toString(int algorithm){ g(o^'f  
return name[algorithm-1]; @[TSJi  
} !]8QOn7=  
DeQ ZDY //  
public static void sort(int[] data, int algorithm) { J[\8:qE  
impl[algorithm-1].sort(data); q9Lq+4\  
} &sJ6k/l  
>ATccv  
public static interface Sort { #Xi9O.  
public void sort(int[] data); H00iy$R  
} QghL=  
H 9?txNea  
public static void swap(int[] data, int i, int j) { t+Qx-sW  
int temp = data;  qt. =  
data = data[j]; J(,{ -d-E  
data[j] = temp; L~Xzo  
} :M@#.  
} X09i+/ICK  
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