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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。 $>8O2p7W  
插入排序: UX2@eyejQ7  
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package org.rut.util.algorithm.support; S:K$fFcJ  
6b7c9n Z  
import org.rut.util.algorithm.SortUtil; y>#_LhTX-  
/** X"jL  
* @author treeroot s{Og3qUy  
* @since 2006-2-2 /1v:eoF;  
* @version 1.0 P BVF'~f@j  
*/ vM@8&,;  
public class InsertSort implements SortUtil.Sort{ pO/vD~C>  
fN1b+ d~*6  
/* (non-Javadoc) /-knqv  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6HguZ_jC  
*/ soRY M  
public void sort(int[] data) { DfU]+;AE  
int temp; x5Ue"RMl+  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); QuP)j1"X  
} Z2L7US -  
} bv;. 6C(T<  
} v.- r %j{I  
D^QL.Du,  
} ]K3bDU~  
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冒泡排序: V'tqsKQ!  
q;lR|NOh  
package org.rut.util.algorithm.support; ~ _hA{$  
8(Q|[  
import org.rut.util.algorithm.SortUtil; [_KV;qS%/  
r#A*{4wz  
/** S0Ur{!9\#^  
* @author treeroot !{4'=+  
* @since 2006-2-2 )7{r8a  
* @version 1.0 f|=u{6  
*/ QE8 `nMf  
public class BubbleSort implements SortUtil.Sort{ L PS,\+  
S&'?L0  
/* (non-Javadoc) v}J0j  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fP[S.7F+No  
*/ 2FW"uYA;6  
public void sort(int[] data) { 1 0zw}1x  
int temp; C;5`G *e  
for(int i=0;i for(int j=data.length-1;j>i;j--){ -%0pYB  
if(data[j] SortUtil.swap(data,j,j-1); gAh#H ?MM  
} Q5hOVD%  
} jJaMkF;f  
} Dpwqg3,  
} bSz@@s.  
V%{WH}  
} ')}itS8  
{+ Ibi{  
选择排序: .hM t:BMf*  
E]v]fy"  
package org.rut.util.algorithm.support; /N({"G'  
!g`I*ZE+e  
import org.rut.util.algorithm.SortUtil; w=CzPNRHH!  
q'/o=De  
/** o%f:BJS  
* @author treeroot n|pdYe8\  
* @since 2006-2-2 eh%{BXW[p  
* @version 1.0 @`#x:p:  
*/ H0!$aO  
public class SelectionSort implements SortUtil.Sort { 2~ 4&4  
n!.=05OtX  
/* Yo1]HG(kXB  
* (non-Javadoc) -uu&{$  
* 8{]nS8i  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @ze2'56F}  
*/ 7x=4P|(\}  
public void sort(int[] data) { @)x*62r+  
int temp; >gs_Bzy]  
for (int i = 0; i < data.length; i++) { &S`g&  
int lowIndex = i; 3A{)C_1a  
for (int j = data.length - 1; j > i; j--) { #?k</~s6M`  
if (data[j] < data[lowIndex]) { |d z2Drc  
lowIndex = j; 0WfnX>(C7R  
} BzzZ.AH~  
} Vhh=GJ  
SortUtil.swap(data,i,lowIndex); k$ T  
} ;X a N  
} 2y \ogF  
zRa2iCi  
} {NQCe0S+p  
'!ks $}$`h  
Shell排序: j>e RV ol  
^%!SKhRIK  
package org.rut.util.algorithm.support; ";7xE#jRk  
g~b$WV%  
import org.rut.util.algorithm.SortUtil; @ZjO#%Ep/  
Z:<an+v|5  
/** zd)QCq  
* @author treeroot ?G,gPb  
* @since 2006-2-2 .j&#  
* @version 1.0 =-_hq'il  
*/ 6D[]Jf,9  
public class ShellSort implements SortUtil.Sort{ FF#+d~$z  
^<qi&*  
/* (non-Javadoc) n1b:Bv4"]#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lz ::6}  
*/ }3_b%{  
public void sort(int[] data) { -ycdg'v  
for(int i=data.length/2;i>2;i/=2){ mhX66R  
for(int j=0;j insertSort(data,j,i); WR`NISSp  
} Ll-QhcC$  
} y3o3G  
insertSort(data,0,1); 4Ngp  -  
} j}B86oX  
~,oz hj0f/  
/** Rzh.zvxTp  
* @param data m(?{#aaq  
* @param j b1cVAfUP  
* @param i W1M322]>L  
*/ i721(1  
private void insertSort(int[] data, int start, int inc) { F81EZ/  
int temp; N6of$p'N  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); T)OR HJ&,  
} ,Pcg+^A  
} [FrLxU  
} 0 }qlZFB  
@MB)B5  
} 0ug&HEl_w  
gpf0 -g-X  
快速排序: |,5|ZpgL  
$H[q5(_~  
package org.rut.util.algorithm.support; v*qbzW`  
-aVC`  
import org.rut.util.algorithm.SortUtil; UOf\pG  
7n.Oem  
/** )gSqO{Z  
* @author treeroot !`RMXUV  
* @since 2006-2-2 Osm))Ua(  
* @version 1.0 &Jb\}c}  
*/ dr}PjwW%  
public class QuickSort implements SortUtil.Sort{ PZJ9f8 V  
f+hHc8g  
/* (non-Javadoc) );VuZsmi  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) knYp"<qj  
*/ 'sH_^{V2  
public void sort(int[] data) { |idw?qCn  
quickSort(data,0,data.length-1); 2nC,1%kxhq  
} rIJPgF  
private void quickSort(int[] data,int i,int j){ fglfnx0{  
int pivotIndex=(i+j)/2; A]5];c  
file://swap e2N K7  
SortUtil.swap(data,pivotIndex,j); v\4<6Z:4  
pvUV5^B(M  
int k=partition(data,i-1,j,data[j]); jq*`| m;Q  
SortUtil.swap(data,k,j); j}",+H v  
if((k-i)>1) quickSort(data,i,k-1); pv sa?z;rP  
if((j-k)>1) quickSort(data,k+1,j); M*ZN]9{^.  
;aW k-  
} r *6S1bW  
/** (g/A uL  
* @param data 5|*`} ;/y  
* @param i N'9T*&o+  
* @param j z8awND  
* @return ;*<R~HJt  
*/ uO eal^uS  
private int partition(int[] data, int l, int r,int pivot) { vg[3\!8z[  
do{ @-Q l6k  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); -qDqJ62mC  
SortUtil.swap(data,l,r); Jj+Q2D:  
} -u'"l(n)~  
while(l SortUtil.swap(data,l,r); oo2d,  
return l; K&`1{,  
} l#1#3F  
 [. 9[?8  
} ?..BA&zRk  
2O[sRm)  
改进后的快速排序: =hFY-~U  
'xj5R=V  
package org.rut.util.algorithm.support; l7qW)<r  
MkoK(m{7  
import org.rut.util.algorithm.SortUtil; r>peKo[X(  
(~zu4^9w  
/** f%@~|:G:  
* @author treeroot =dDPQZEin  
* @since 2006-2-2 `sT;\  
* @version 1.0 lMGO4U[z  
*/ m","m  
public class ImprovedQuickSort implements SortUtil.Sort { ?l?l<`sTO  
=3-?$  
private static int MAX_STACK_SIZE=4096; {<gv1Yht  
private static int THRESHOLD=10; Y06^M?}  
/* (non-Javadoc) {@)ZXg  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4 O8ct,Y  
*/ h Fv{?v  
public void sort(int[] data) { oH%[8!#  
int[] stack=new int[MAX_STACK_SIZE]; O8$~dzf,2  
w=WF$)ZU  
int top=-1; 6d6cZGS[:  
int pivot; )w M%Ul<s  
int pivotIndex,l,r; McasnjC  
Fb]+h)on  
stack[++top]=0; !P=Cv=  
stack[++top]=data.length-1; !9_(y~g{N  
ftxL-7y%  
while(top>0){ 4-x<^ ev=  
int j=stack[top--]; { sC Ni  
int i=stack[top--]; A5yVxSF  
F6[F~^9D  
pivotIndex=(i+j)/2; uW!XzX['  
pivot=data[pivotIndex]; {+WY,%e  
e6j1Fa9  
SortUtil.swap(data,pivotIndex,j); #Z2 'Y[@.  
. &j+&  
file://partition )&j`5sSXcr  
l=i-1; dE_Xd :>  
r=j; w/nohZF6H  
do{ %o%V4K*  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); T{C;bf:Q  
SortUtil.swap(data,l,r); W^ L ^7  
} /_qq(,3  
while(l SortUtil.swap(data,l,r); r3g^ 0|)  
SortUtil.swap(data,l,j); ;F"!$Z/  
MIIl+   
if((l-i)>THRESHOLD){ ,7&\jET5^0  
stack[++top]=i; (V6bX]<  
stack[++top]=l-1; Qs,\P^n  
} BjvQ6M{Y"+  
if((j-l)>THRESHOLD){ ~hvj3zC5xz  
stack[++top]=l+1; 2 3PRb<q  
stack[++top]=j; -|m3=#  
} +zMPkbP6  
#!R>`l(S  
} =Z:] %  
file://new InsertSort().sort(data); Mc@9ivwL#  
insertSort(data); JfN5#+_i  
} $3HqVqF^R  
/** iX+8!>Q  
* @param data JKM(fX+  
*/ +ausm!~6  
private void insertSort(int[] data) { I </P_:4G  
int temp; f $Agcy  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); H:~p5t  
} 9u( pn`e 3  
} 1PwtzH .w  
} 7 <^+)DsS?  
|"SZpx  
} +QFKaS<sn  
KNAvLcg  
归并排序: dRron_'  
Jj \ nye+  
package org.rut.util.algorithm.support; Ea@0>_U|  
_  Lh0  
import org.rut.util.algorithm.SortUtil;  pRobx  
L K #A  
/** N# }w1]  
* @author treeroot _k2R^/9Ct%  
* @since 2006-2-2 ;]-08lzO<4  
* @version 1.0 dP8qP_77A~  
*/ kT@ITA22  
public class MergeSort implements SortUtil.Sort{ I+& T}R  
;\0|1Eem`  
/* (non-Javadoc) '0+I'_(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZwMVFC-d  
*/ 6LDZ|K@  
public void sort(int[] data) { ! *sXLlS  
int[] temp=new int[data.length]; ':4<[Vk  
mergeSort(data,temp,0,data.length-1); &}p\&4  
} L }*o8l`  
k _V+;&:%  
private void mergeSort(int[] data,int[] temp,int l,int r){ D", L.  
int mid=(l+r)/2; Mgw#4LU  
if(l==r) return ; 1 7~Pc  
mergeSort(data,temp,l,mid); 2X2Ax~d@  
mergeSort(data,temp,mid+1,r); F|F0#HC ?  
for(int i=l;i<=r;i++){ 8?nn4]P  
temp=data; s5@BVD'}E  
} M +OVqTsFU  
int i1=l; uQW)pD{_  
int i2=mid+1; .:j{d}p}  
for(int cur=l;cur<=r;cur++){ FAnz0p+t  
if(i1==mid+1) Bo "9;F  
data[cur]=temp[i2++]; 5<(* +mP`  
else if(i2>r) w PR Ns9^  
data[cur]=temp[i1++]; LLTr+@lj  
else if(temp[i1] data[cur]=temp[i1++]; bPFGQlmIO  
else B9"o Ru^}  
data[cur]=temp[i2++]; Y5GN7.  
} @o0HDS  
} ejV`W7U  
YdCl  
} MM32\}Y6  
M$EF 8   
改进后的归并排序: UmVn:a  
,9ueHE  
package org.rut.util.algorithm.support; "QOQ  
g4WmUV#wp  
import org.rut.util.algorithm.SortUtil; vb~%u;zrC@  
;&j'`tP  
/** >k"O3Pc@  
* @author treeroot SdlO]y9E  
* @since 2006-2-2 O<s7VHj  
* @version 1.0 . \a+m  
*/ |^8ND #x  
public class ImprovedMergeSort implements SortUtil.Sort { 55O}SUs!P  
En&7e  
private static final int THRESHOLD = 10; Hi[lN7ma8  
q<E7q Y+  
/* K7&]| ^M9  
* (non-Javadoc) HHx:s2G  
* z#Jw?K_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l5w^rj  
*/ |2^m CL.r  
public void sort(int[] data) { oqwW  
int[] temp=new int[data.length]; V Dnrm*  
mergeSort(data,temp,0,data.length-1); w~B1TfqNo  
} ?/&X _O  
p_Xfj2E4c  
private void mergeSort(int[] data, int[] temp, int l, int r) { wBpt W2jA  
int i, j, k; : _Y^o  
int mid = (l + r) / 2; \/1~5mQ+  
if (l == r) 2tK~]0x  
return; l^R:W#*+U  
if ((mid - l) >= THRESHOLD) $CB&>?~  
mergeSort(data, temp, l, mid); -J63'bb7oi  
else 'n7|fjX?Y  
insertSort(data, l, mid - l + 1); BPkMw'a:  
if ((r - mid) > THRESHOLD) s&ox%L4  
mergeSort(data, temp, mid + 1, r); &G%AQpDW5  
else i}LQ}35@  
insertSort(data, mid + 1, r - mid); qE2<vjRg  
&k)+]r  
for (i = l; i <= mid; i++) { 3)VO{Cj!  
temp = data; -aJ(-Np$f  
} 49E| f ^q  
for (j = 1; j <= r - mid; j++) { {@KLN<  
temp[r - j + 1] = data[j + mid]; G:b6Wf  
} x%X3FbF]  
int a = temp[l]; &H# l*  
int b = temp[r]; ~W>{Dd(J_  
for (i = l, j = r, k = l; k <= r; k++) { ~*EipxhstJ  
if (a < b) { yzfiH4  
data[k] = temp[i++]; %u%;L+0Q[  
a = temp; ypM,i  
} else { 6 T4"m  
data[k] = temp[j--]; 'dwsm7Xd  
b = temp[j]; ; ]% fFcy  
} 9*iVv)jd  
} 1N _"Mm{  
} [uqr  
}%wP^6G*x\  
/** 0*:n<T9  
* @param data tz65Tn_M  
* @param l #p=+RTZ<  
* @param i %+/v")8+?  
*/ 1<x5{/CZ  
private void insertSort(int[] data, int start, int len) {  e#5WX  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j\KOKvY)  
} CPa+?__B  
} KUX6n(u  
} ,?U(PEO\f  
} q:up8-LAr  
!pe[H*Cy  
堆排序: VKXi*F9  
7202N?a {  
package org.rut.util.algorithm.support; r8R7@S2V'  
n)cc\JPQ  
import org.rut.util.algorithm.SortUtil; UV%o&tv|<  
b^[>\s'  
/** :F5(]g 7  
* @author treeroot 6R m dt  
* @since 2006-2-2 fC^d@4ha  
* @version 1.0 ajRht +{  
*/ Q >yj<DR  
public class HeapSort implements SortUtil.Sort{ m?Jnb\0  
xg%{p``  
/* (non-Javadoc) B7A.~' =  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :zC=JvKT  
*/ MeV4s%*O+  
public void sort(int[] data) { i{:?Iw 'ay  
MaxHeap h=new MaxHeap(); ^38k xwh  
h.init(data); 9&kY>M>z0  
for(int i=0;i h.remove(); :1'1 n  
System.arraycopy(h.queue,1,data,0,data.length); n>^9+Rx|i  
} 78T;b7!-C  
zGO_S\  
private static class MaxHeap{ ;,/G*`81B  
5-a^Frmg#"  
void init(int[] data){ mMZ=9 ?m  
this.queue=new int[data.length+1]; WZA1nzRc  
for(int i=0;i queue[++size]=data; +7"UF) ~k  
fixUp(size); T8LvdzS  
} kVWrZ>McK  
} '#K~hep  
ZnbpIJ8cV  
private int size=0; JKYtBXOl  
M9Z9s11{H  
private int[] queue; pOy(XUV9O  
|<]wM(GxE  
public int get() { |a1zJ_t4  
return queue[1]; U GOe(JB  
} 4`CO>Q  
M(^IRI-  
public void remove() { qsN}KgTjg  
SortUtil.swap(queue,1,size--); $43CNnf3N  
fixDown(1); y}QqS/  
} M;-FW5O't  
file://fixdown Oa5-^&I  
private void fixDown(int k) { B 4e}%  
int j; /KiaLS  
while ((j = k << 1) <= size) { +ZwTi!W  
if (j < size %26amp;%26amp; queue[j] j++; UA0R)BH'  
if (queue[k]>queue[j]) file://不用交换 Dxr4B<  
break; q<g!bW%  
SortUtil.swap(queue,j,k); 1{xkAy0  
k = j; %&O'>L  
} _=5\$6  
} ,E(M<n|.  
private void fixUp(int k) { wGz_IL.D  
while (k > 1) { w@N)Pu  
int j = k >> 1; F0'o!A#|(  
if (queue[j]>queue[k]) 6>d 3*   
break; [di&N!Ao  
SortUtil.swap(queue,j,k); ]w8h#p  
k = j; S@L%X<Vm  
} IgF#f%|Q  
} >vfLlYx  
|Pse=_i  
} ijNI6_eU  
A.P*@}9  
} d/?0xLW  
xUs1-O1i  
SortUtil: H#`&!p  
~bjT,i  
package org.rut.util.algorithm; \y/0)NL\  
U%2{PbL  
import org.rut.util.algorithm.support.BubbleSort; xl,?Hh%#  
import org.rut.util.algorithm.support.HeapSort; 1$c[G}h  
import org.rut.util.algorithm.support.ImprovedMergeSort; i\L7z)u  
import org.rut.util.algorithm.support.ImprovedQuickSort; G>^ _&(c@2  
import org.rut.util.algorithm.support.InsertSort; 1UH_"Q03  
import org.rut.util.algorithm.support.MergeSort; R<>uCF0  
import org.rut.util.algorithm.support.QuickSort; YH[HJ#:7r  
import org.rut.util.algorithm.support.SelectionSort; PurY_  
import org.rut.util.algorithm.support.ShellSort; cmLI!"RLe  
H%Sx*|  
/** TP/bPZY  
* @author treeroot  YP}r15P  
* @since 2006-2-2 =~ j S  
* @version 1.0 Bv=:F5hLG  
*/ *5'l"YQ@1  
public class SortUtil { Su`] ku'  
public final static int INSERT = 1; Fc"+L+h@W  
public final static int BUBBLE = 2; <C7/b#4>\  
public final static int SELECTION = 3; m3b?f B  
public final static int SHELL = 4; 1b"3]?  
public final static int QUICK = 5; }l@7t&T|  
public final static int IMPROVED_QUICK = 6; Q"{Q]IT  
public final static int MERGE = 7; V_Y2@4  
public final static int IMPROVED_MERGE = 8; MW.,}f  
public final static int HEAP = 9; !L' O")!3  
U| 1&=8l  
public static void sort(int[] data) { )RwO2H  
sort(data, IMPROVED_QUICK); -+.-Ab7  
} hrnY0  
private static String[] name={ V^p XbDRl  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q/\Hh9`  
}; \E:l E/y  
2W`<P2IA  
private static Sort[] impl=new Sort[]{ {&Sr<d5  
new InsertSort(), 8J#TP7;  
new BubbleSort(), H Ff9^  
new SelectionSort(), LfS]m>>e  
new ShellSort(), )pt#Pu  
new QuickSort(), N Y~y:*:Q  
new ImprovedQuickSort(), "/U~j4O  
new MergeSort(), ,`l8KRd  
new ImprovedMergeSort(), _;5N@2?  
new HeapSort() V}"w8i+D?  
}; >!2d77I  
N u9+b"Wr  
public static String toString(int algorithm){ 7tz #R :  
return name[algorithm-1]; _S#3!Wx  
} &l1CE1 9<  
umj5M5oe3  
public static void sort(int[] data, int algorithm) { +QVe -  
impl[algorithm-1].sort(data); fxk6q$'  
} DC%H(2  
+aIy':P  
public static interface Sort { C")NN s =  
public void sort(int[] data); yE),GJ-m\<  
} Q" an6ht|  
l 7=WO#Pb  
public static void swap(int[] data, int i, int j) { 5oI gxy  
int temp = data; HvVS<Ke  
data = data[j]; @8 GW?R  
data[j] = temp; 'uA$$~1  
} mq~L1< f  
} *6%r2l'kZ  
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