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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。 8FkFM^\1L  
插入排序: pV(lhDNoQ  
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package org.rut.util.algorithm.support; ' GG=Ebt  
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import org.rut.util.algorithm.SortUtil; l4y{m#/  
/** pS[KBQ"F  
* @author treeroot {/<6v. v  
* @since 2006-2-2 RDM`9&V!jp  
* @version 1.0 v4Ga0]VN$8  
*/ RthT \%R  
public class InsertSort implements SortUtil.Sort{ WO</Mw  
/`npQg-  
/* (non-Javadoc) AVw%w&|%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 17.x0 gW,  
*/ |=a}iU8  
public void sort(int[] data) { J#2!ZQE 3  
int temp; ? 1*m,;Z  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); N#C1-*[C  
} Q@@v1G\  
} _7T@5\b:;  
} H ?M/mGP  
$ (=~r`O+1  
} }!>=|1 fY  
5S{7En~zUE  
冒泡排序: X"fh@.  
[&?8,Q(  
package org.rut.util.algorithm.support; c`*TPqw(B[  
,m=4@ofX  
import org.rut.util.algorithm.SortUtil; -fI@])$9J  
 j2l55@  
/** 8qEK+yi,  
* @author treeroot Rli:x  
* @since 2006-2-2 A@*:<Hs%  
* @version 1.0 efP&xk  
*/ q .4A(,  
public class BubbleSort implements SortUtil.Sort{ x35cW7R}T_  
-62'}%?A<C  
/* (non-Javadoc) eP.Vd7ky  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SJt<+kg  
*/ 0c^>eq]  
public void sort(int[] data) { 6$fYt&1  
int temp; &k7;DO  
for(int i=0;i for(int j=data.length-1;j>i;j--){ mo{MR:>)  
if(data[j] SortUtil.swap(data,j,j-1); ._9 n~=!  
} `(6r3f~XJ  
} G rmzkNlN  
}  ^YdcAHjK  
} Sn4[3JV$l  
2lKV#9"  
} ?E%ELs_Dl  
k67a'pmyJ  
选择排序: P + "Y  
3@Z#.FV~C[  
package org.rut.util.algorithm.support; #@@Mxr'F  
0Uk@\[1ox  
import org.rut.util.algorithm.SortUtil; vsWHk7 9  
h N2:d1f0  
/** @+F4YJmB?l  
* @author treeroot S [h];eM  
* @since 2006-2-2 %?^6).aEK  
* @version 1.0 Eodn/  
*/ sVk$x:k1M  
public class SelectionSort implements SortUtil.Sort { 54-#QIx|  
$;M:TpX  
/* dz [!-M  
* (non-Javadoc) r0d35  
* m'\2:mDu0  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <<](XgR(  
*/ mkh"Kb*{  
public void sort(int[] data) { ?{w3|Ef&  
int temp; -Y Bd, k3  
for (int i = 0; i < data.length; i++) {  c gzwx  
int lowIndex = i; G0u LmW70  
for (int j = data.length - 1; j > i; j--) { g,o?q:FL  
if (data[j] < data[lowIndex]) { '0y9MXRT  
lowIndex = j; KDl_?9E5  
} \)K^=jM  
} I1oje0$  
SortUtil.swap(data,i,lowIndex); #_Z$2L"U  
} 7QKr_  
} / N) W2  
@';B_iQ  
} 8t@p @Td|  
"H -"  
Shell排序: bl_H4  
y2]-&]&  
package org.rut.util.algorithm.support; ydw)mT44K  
bY}eUL2i4  
import org.rut.util.algorithm.SortUtil; uZfnzd)c  
V-n&oCS+f  
/** SS`qJZ|w  
* @author treeroot F:y[@Yn  
* @since 2006-2-2 2C{H$ A,pW  
* @version 1.0 U9D!GKVp  
*/ ? (*t@ {k  
public class ShellSort implements SortUtil.Sort{ l]~n3IK"  
"S 3wk=?4  
/* (non-Javadoc) WDFjp  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FnJ?C&xK  
*/ lWBb4 !l  
public void sort(int[] data) { pV4Whq$  
for(int i=data.length/2;i>2;i/=2){ 2I*;A5$N1  
for(int j=0;j insertSort(data,j,i); fDG0BNLY  
} |6=p{ y  
} xI>A6  
insertSort(data,0,1); &Tl 0Pf  
} l;y7]DO  
>.dWjb6t  
/** 8 k3S  
* @param data '* \|; l#1  
* @param j K\XH4kic  
* @param i s w39\urf  
*/ >``MR%E:<  
private void insertSort(int[] data, int start, int inc) { ~QvqG{bFB  
int temp; h?bb/T+'  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); o9cM{ya/>  
} 5M9 I,  
} oB74y  
} DjSbyXvrg  
Gmf B  
} [<'-yQ{l\  
Us+pc^A  
快速排序: J'N!Omz  
sdQkT#%y  
package org.rut.util.algorithm.support; ~z"= G5|  
@6l%,N<fou  
import org.rut.util.algorithm.SortUtil; _`64gS}^  
!"8fdSfg w  
/** 3;% 5Yu  
* @author treeroot ^ bEc6`eE  
* @since 2006-2-2 Q WMdn  
* @version 1.0 \GHiLs,!  
*/ ;FZ@:%qDm  
public class QuickSort implements SortUtil.Sort{ Sm~l:v0%  
o] mD"3_  
/* (non-Javadoc) H\XP\4#u  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x3PD1JUf  
*/ YZ%Hu)  
public void sort(int[] data) { J>u 7,  
quickSort(data,0,data.length-1); {uGP&cS~(  
} 6oF7:lt  
private void quickSort(int[] data,int i,int j){ Ok n(pJ0  
int pivotIndex=(i+j)/2; 2Ry1b+\  
file://swap 5Ri6Z#qm  
SortUtil.swap(data,pivotIndex,j); F <hJp,q9  
kWdi59 5  
int k=partition(data,i-1,j,data[j]); vDH>H^9Y  
SortUtil.swap(data,k,j); qhT@;W/X  
if((k-i)>1) quickSort(data,i,k-1); 7O, U?p  
if((j-k)>1) quickSort(data,k+1,j); !9xp cQ>  
~ o1x;Y6  
} i\W/C  
/** ` AY_2>7  
* @param data -eX5z  
* @param i C+|b1/N-  
* @param j T0&f8  
* @return @xB*KyUW  
*/ }#X8@  
private int partition(int[] data, int l, int r,int pivot) { It{;SKeo  
do{  A^p[52`  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); |g=="  
SortUtil.swap(data,l,r); qL,tYJ<m%  
} wC5ee:u C%  
while(l SortUtil.swap(data,l,r); 1UKg=A-q  
return l; C`5  
} OK\A</8r  
w: >5=mfk  
} cK 06]-Y  
=b/L?dR.-  
改进后的快速排序: yz0zFfiX  
A<W 6=5h  
package org.rut.util.algorithm.support; ?wO-cnl  
y.[Mnj  
import org.rut.util.algorithm.SortUtil; e^O(e  
3Kn_mL3V-  
/** f]`vRvbe  
* @author treeroot F$[ U|%*  
* @since 2006-2-2 e*L.U~ZR  
* @version 1.0 .w]GWL  
*/ g&`pgmUX  
public class ImprovedQuickSort implements SortUtil.Sort { fJ ,1Ef;Z  
j\m_o% 4  
private static int MAX_STACK_SIZE=4096; L(U"U#QZ  
private static int THRESHOLD=10; F4K0) ;  
/* (non-Javadoc) 9]e V?yoA8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $ aUo aI  
*/ 48Mpf=f`  
public void sort(int[] data) { X,LD   
int[] stack=new int[MAX_STACK_SIZE]; :rg5Kt&  
7e<c$t#H  
int top=-1; uJ6DO#d`P  
int pivot; Kw#i),M  
int pivotIndex,l,r; A\#iXOd  
Aj0Tfdxy  
stack[++top]=0; 2 aL)  
stack[++top]=data.length-1; VZ\B<i  
A,`8#-AX  
while(top>0){ Qci4J  
int j=stack[top--]; i F+vl]  
int i=stack[top--]; n/h,Lr)Z  
f aLtdQi  
pivotIndex=(i+j)/2; b?Ki;[+O  
pivot=data[pivotIndex]; Mb]rY>B4  
ahPoEh  
SortUtil.swap(data,pivotIndex,j); ?.YOI.U^  
c_V;DcZ  
file://partition :hM/f  
l=i-1; KG=h&  
r=j; /RMPS. d {  
do{ =MvjLh"s  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Pcw6!xH  
SortUtil.swap(data,l,r); LGl2$#x  
} (<)]sp2   
while(l SortUtil.swap(data,l,r); kS!viJwtT  
SortUtil.swap(data,l,j); LA`*_|}qcR  
ak;*W  
if((l-i)>THRESHOLD){ Ovj^IjG-`  
stack[++top]=i; 4)("v-p  
stack[++top]=l-1; !=N"vD*  
} *guoWPA|Ij  
if((j-l)>THRESHOLD){ d20gf:@BM  
stack[++top]=l+1; ZfB " E  
stack[++top]=j; YJo["Q  
} PP!SK2u "L  
t1%_DPD%W  
} qs QNjt  
file://new InsertSort().sort(data); ,%)6jYHRw  
insertSort(data); T,VY.ep/  
} )LyojwY_g  
/** 'Tc]KXD6  
* @param data a|?4 )  
*/ >hr{JJe  
private void insertSort(int[] data) { Iyyh!MVF  
int temp; EbdfV-E  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); TsGE cxIg  
} 3%E74 mOcD  
} y>aZXa  
} .<Zy|1 4  
c.j$9=XLBG  
} ,L`$09\  
p8]68!=W\F  
归并排序: beu\cV3  
}5 (Ho$S(  
package org.rut.util.algorithm.support; HTyLJe  
vo#UtN:q  
import org.rut.util.algorithm.SortUtil; +mp@b942*  
ph-ATJ"  
/** ^Y iJV7  
* @author treeroot %b"\bHH  
* @since 2006-2-2 Mv6 -|O  
* @version 1.0 di>cMS 4 c  
*/ L*~J%7  
public class MergeSort implements SortUtil.Sort{ 19j+lCSvH  
1Tm^  
/* (non-Javadoc) T16{_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $]/Zxd  
*/ jb^N|zb  
public void sort(int[] data) { x(eb5YS  
int[] temp=new int[data.length]; ruazOmnn~  
mergeSort(data,temp,0,data.length-1); k0Uyf~p~  
} A$a1(8H  
%!PM&zV  
private void mergeSort(int[] data,int[] temp,int l,int r){ 4'LB7}WG  
int mid=(l+r)/2; F  3'9u#  
if(l==r) return ; NvvUSyk\;s  
mergeSort(data,temp,l,mid); :=[XW?L%x  
mergeSort(data,temp,mid+1,r); Xt'sQ}  
for(int i=l;i<=r;i++){ <,>P0tY}  
temp=data; &Ky_v^  
} T.qNCJmB  
int i1=l; ?|ZTaX6A  
int i2=mid+1; 6O}`i>/6M  
for(int cur=l;cur<=r;cur++){ Z"uY}P3  
if(i1==mid+1) ]TyisaT  
data[cur]=temp[i2++]; )u qA(R>  
else if(i2>r) qvv2O1c"A  
data[cur]=temp[i1++]; 8{Fsm;UsY  
else if(temp[i1] data[cur]=temp[i1++]; -G|G_$9  
else w#g#8o>'  
data[cur]=temp[i2++]; \l@,B +)  
} HuV J\%.  
} ;Yg{zhJX~  
//4Xq8y  
} "^1L'4'S  
kGN+rHo   
改进后的归并排序: gL3"Gg3  
-k7X:!>QHC  
package org.rut.util.algorithm.support; Q(\4]i< S  
_BDK`D  
import org.rut.util.algorithm.SortUtil; <fs2fTUeqF  
U2%.S&wS,e  
/** 3dDX8M?  
* @author treeroot  ]$,UPR/3  
* @since 2006-2-2 %=BMZRn  
* @version 1.0 bl'z<S, '  
*/ YLVPAODY  
public class ImprovedMergeSort implements SortUtil.Sort { s|NjT  
UDL RCS8i  
private static final int THRESHOLD = 10; 5P'p2x#U  
oy;K_9\  
/* LvEnXS  
* (non-Javadoc) !XzF67  
* po}F6m8bX  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C*G=cs\i  
*/ -<_Ww\%8M  
public void sort(int[] data) { U5 r7j  
int[] temp=new int[data.length]; N72Yq)(  
mergeSort(data,temp,0,data.length-1); 0V!l,pg  
} yA3wtm/?  
<u=4*:QE  
private void mergeSort(int[] data, int[] temp, int l, int r) { _fwb!T}$  
int i, j, k;  <Tot|R;  
int mid = (l + r) / 2; ]K*8O <  
if (l == r) sQ 8s7l0D  
return; 7 K{Nb  
if ((mid - l) >= THRESHOLD) 84{Q\c  
mergeSort(data, temp, l, mid); A%2:E^k(s  
else _A0mxq  
insertSort(data, l, mid - l + 1); oY=q4D  
if ((r - mid) > THRESHOLD) 1* ]Ev  
mergeSort(data, temp, mid + 1, r); 8x[YZ@iM-  
else /NFz4h =>  
insertSort(data, mid + 1, r - mid); bTSL<"(]N  
=GXu 5 8  
for (i = l; i <= mid; i++) { aIXdV2QS  
temp = data; )$Z=t-q  
} wWXD\{Hk  
for (j = 1; j <= r - mid; j++) { 2+Wzf)tB  
temp[r - j + 1] = data[j + mid]; `4 y]Z)  
} 8#&q$kE  
int a = temp[l]; s-ZI ^I2\  
int b = temp[r]; K2<~(78C  
for (i = l, j = r, k = l; k <= r; k++) { z~\t|Z]G,|  
if (a < b) { )H}#A#ovj7  
data[k] = temp[i++]; SZ_V^UX_  
a = temp; 4&cL[Ny  
} else { |G/7_+J6  
data[k] = temp[j--]; lW 81q2n  
b = temp[j]; P%MfCpyj  
} 3! ~K^Z]  
} Mzd[fR5a8  
} $@i"un;  
4R8G&8b  
/** _pH{yhA  
* @param data T{}fHfM  
* @param l &''WRgZ}  
* @param i K]xa/G(  
*/ Cb:gH}j  
private void insertSort(int[] data, int start, int len) { WGAXIQ  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !7d*v3)d  
} %5*@l vy  
} U'*t~x <  
} BtY%r7^o  
} UgN28YrW  
-!({B H-M_  
堆排序: pDh se2  
\sA*V%n  
package org.rut.util.algorithm.support; }!i` 0p  
&J!aw  
import org.rut.util.algorithm.SortUtil; 6q>+!kXh  
[/_+>M  
/** =\t /u  
* @author treeroot dXn%lJ  
* @since 2006-2-2 5TUNX^AW  
* @version 1.0 )J(q49  
*/ |~<N -~.C  
public class HeapSort implements SortUtil.Sort{ 0ji q-3V)  
*U#m+@\0  
/* (non-Javadoc) tM j1~ R  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0L^u2HZYL  
*/ KTEZ4K^o=  
public void sort(int[] data) { S. |FL%;  
MaxHeap h=new MaxHeap(); #;# 3%?  
h.init(data); ^ZTGJ(j7~  
for(int i=0;i h.remove(); 19q{6X`x  
System.arraycopy(h.queue,1,data,0,data.length); j 6ut}Uq  
} !q"CV  
k8]O65t|  
private static class MaxHeap{ 2-0$FQ@/  
smQVWs>  
void init(int[] data){ +{53a_q  
this.queue=new int[data.length+1]; AD('=g J  
for(int i=0;i queue[++size]=data; 4F MAz^  
fixUp(size); 3_5XHOdE  
} !8tS|C#2  
} O''y>N9  
SNT5Amz!  
private int size=0; $WW)bP d4^  
'PWQnt_U  
private int[] queue; jQj,q{eA  
Z"I/ NGiU  
public int get() { %zo= K}u  
return queue[1]; l+y-Fo@  
} xU9@$am  
H]#Rg`~n  
public void remove() { l)+:4N?iVv  
SortUtil.swap(queue,1,size--); .>6 Wv0  
fixDown(1); Z$KV&.=+  
} @\Js8[wS9@  
file://fixdown +K6szGP  
private void fixDown(int k) { #NRh\Wj|  
int j; dX )W0  
while ((j = k << 1) <= size) { /2NSZO  
if (j < size %26amp;%26amp; queue[j] j++; gmSQcN)  
if (queue[k]>queue[j]) file://不用交换 0NO1M)HQv  
break; RM*f|j  
SortUtil.swap(queue,j,k); 0&fl#]oCE  
k = j; /owO@~G  
} PQj<[rY  
} ] y1fM0  
private void fixUp(int k) { -g`IH-B  
while (k > 1) { J^3H7 ]  
int j = k >> 1; vH?9\3  
if (queue[j]>queue[k]) CP` XUpX`&  
break; (xyS7q]m  
SortUtil.swap(queue,j,k); 8TZENRzx-|  
k = j; Lu>H`B7Q"  
} nwM)K  
} h ; kfh.  
)%JD8;[Jq  
} <`g3(?   
GHN3PEJ>  
} G{c#\?12C  
.]76!(fWZ  
SortUtil: =ak7ld A=2  
9XV^z*E(J  
package org.rut.util.algorithm; IjZ@U%g@;  
!Ua&0s%  
import org.rut.util.algorithm.support.BubbleSort; 0\a8}b||  
import org.rut.util.algorithm.support.HeapSort; [N|xzMe  
import org.rut.util.algorithm.support.ImprovedMergeSort; {0's~U+@  
import org.rut.util.algorithm.support.ImprovedQuickSort; g*-2* \  
import org.rut.util.algorithm.support.InsertSort; N\R=cwk  
import org.rut.util.algorithm.support.MergeSort; YL5>V$i  
import org.rut.util.algorithm.support.QuickSort; y @apJ;_R-  
import org.rut.util.algorithm.support.SelectionSort; v:d9o.h  
import org.rut.util.algorithm.support.ShellSort; Q~ 0Dfo w?  
68 x}w Ae  
/** MTmO>V&O  
* @author treeroot q a!RH]B3  
* @since 2006-2-2 d bO#  
* @version 1.0 YBSl-G'  
*/ d\Jji 6W  
public class SortUtil { lfS;?~W0k  
public final static int INSERT = 1; !dv-8C$U  
public final static int BUBBLE = 2; +{rJ[J/g  
public final static int SELECTION = 3; C{Blqf3V0  
public final static int SHELL = 4; D@vMAW  
public final static int QUICK = 5; #@_ 1fE  
public final static int IMPROVED_QUICK = 6; ^Rmoz1d  
public final static int MERGE = 7; ndOfbu;mf  
public final static int IMPROVED_MERGE = 8;  Tb#  
public final static int HEAP = 9; w:Q|?30  
2a[9h #  
public static void sort(int[] data) { a c6*v49  
sort(data, IMPROVED_QUICK); ~Fx&)kegTo  
} iVeQ]k(u  
private static String[] name={ ="B n=>  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .5g}rxO8  
}; 7c::Qf[|  
QHQj/)J8  
private static Sort[] impl=new Sort[]{ %3,xaVN  
new InsertSort(), ?~)Ak`=  
new BubbleSort(), 0>Fqx{!heq  
new SelectionSort(), B| Q6!  
new ShellSort(), rl|Q)A{  
new QuickSort(), ~t9Mh^gij  
new ImprovedQuickSort(),  ? ICDIn  
new MergeSort(), /J;]u3e|  
new ImprovedMergeSort(), k!13=Gh  
new HeapSort() fq Y1ggL  
}; 3'@&c?F ye  
$Q4=37H+  
public static String toString(int algorithm){ nW&$~d  
return name[algorithm-1]; rv?!y8\  
} d;g-3Pf  
:r39wFi  
public static void sort(int[] data, int algorithm) { 2v\W1VF  
impl[algorithm-1].sort(data); 9Dq.lr^  
} U_*3>Q  
yqBa_XPV8  
public static interface Sort { l"L+e!B~  
public void sort(int[] data); 'bm:u  
} IHVMHOq}'  
yiO31uQt  
public static void swap(int[] data, int i, int j) { qvTKfIl{  
int temp = data; Ws>i)6[  
data = data[j]; 6!RikEAh  
data[j] = temp; -aN":?8(G  
} irmwc'n]  
} cUC17z2D  
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