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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。 } SA/,4/9  
插入排序: QXT *O  
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package org.rut.util.algorithm.support; Jo ]8?U(^  
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import org.rut.util.algorithm.SortUtil; Q_R&+@ju  
/** :] +D+[c)  
* @author treeroot k!,&L$sG  
* @since 2006-2-2 \\Huk*Jn{  
* @version 1.0 xqzdXL}  
*/ PAXdIh[]  
public class InsertSort implements SortUtil.Sort{ UG9 Ha  
,}#l0 BY  
/* (non-Javadoc) PT`gAUCw  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3>sA_  
*/ hI 1 }^;  
public void sort(int[] data) { |4FvP R [  
int temp; hbdM}"&]  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 0~XZ  
} SfwAMNCe  
} V5LzUg]  
} AA,n.;zy<  
Q|o~\h<  
} wN!5[N"  
!n/"39KT  
冒泡排序: Y;XEC;PXD  
S(*SUH  
package org.rut.util.algorithm.support; )b AcU  
Hlq#X:DCn  
import org.rut.util.algorithm.SortUtil; &P{[22dQ  
5Y97?n+6  
/** jz;"]k  
* @author treeroot F .JvMy3  
* @since 2006-2-2 F\;G'dm  
* @version 1.0 5eW GX  
*/ A|d(5{:N  
public class BubbleSort implements SortUtil.Sort{ DrB PC@^  
VS\~t  
/* (non-Javadoc) paW7.~3 R  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +O @0gl  
*/ oUBn:Ir@  
public void sort(int[] data) { $/Q*@4t  
int temp; 7.l[tKh  
for(int i=0;i for(int j=data.length-1;j>i;j--){ g k[8'  
if(data[j] SortUtil.swap(data,j,j-1); LN?W~^gsR  
} uN1O(s  
} =7mn= w?  
} %A dE5HI-  
} .pOTIRbA  
^i^/d#  
} _0<EbJ8Z  
y  ZsC>  
选择排序: 5[Yzi> o[  
eZm,K'/!  
package org.rut.util.algorithm.support; +mN]VO*y  
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import org.rut.util.algorithm.SortUtil; 5Vzi{y/bL  
=5jX#Dc5.+  
/** _$?SKid|o  
* @author treeroot (W| Eg  
* @since 2006-2-2 w#5^A(NR  
* @version 1.0 t .&YD x  
*/ RS~jHwIh  
public class SelectionSort implements SortUtil.Sort { iii2nmiK  
!;^sIoRPV  
/* nDS mr  
* (non-Javadoc) (JHL0Z/  
* 8rXu^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H1>}E5^?  
*/ io$!z=W  
public void sort(int[] data) { r-+.Ax4L"  
int temp; . j}dk.#h  
for (int i = 0; i < data.length; i++) { :U>o;  
int lowIndex = i; DUxj^,mf,  
for (int j = data.length - 1; j > i; j--) { ]N^a/&} *  
if (data[j] < data[lowIndex]) { G:QaWqUb  
lowIndex = j; K_4}N%P/))  
} 7 p(^I*|  
} ^E8XPK]-~  
SortUtil.swap(data,i,lowIndex); @O/-~, E68  
} ;aip1Df  
} k ckWBL  
'@h5j6:2  
} YAqv:  
}^;Tt-*k  
Shell排序: %+U.zd$  
#]'#\d#i  
package org.rut.util.algorithm.support; 3PLv;@!#j}  
(8u.Xbdh  
import org.rut.util.algorithm.SortUtil; HgP9evz,0  
oq4*m[  
/** vcnUb$%  
* @author treeroot O<Rm9tZ8  
* @since 2006-2-2 W|oLS  
* @version 1.0 (7G5y7wI"  
*/ y1!c:&  
public class ShellSort implements SortUtil.Sort{ C&b^TLe  
ika/ GG  
/* (non-Javadoc) ON|Bpt2Qp  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A=/|f$s+  
*/ vlAYKtl3]  
public void sort(int[] data) { y-gSal  
for(int i=data.length/2;i>2;i/=2){ :yo tpa  
for(int j=0;j insertSort(data,j,i); F7wpGtt  
} oO-kO!59y  
} %l!Gt"\xm  
insertSort(data,0,1); f:gXXigY,  
} NWuS/Ur`9  
 "MD  
/** pt&(c[  
* @param data %Uj7 g>  
* @param j (-tF=wR,W  
* @param i \e64Us>"x  
*/ #8G (r9  
private void insertSort(int[] data, int start, int inc) { w:P$ S  
int temp; TOp|Qtn  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); GtRc7,  
} r7r>1W%4  
} x,a(O@  
} 2B{~"<  
tY^MP5*  
} Z> jk\[  
y-qbK0=X4  
快速排序: 8|uFW7Q  
^T83E}  
package org.rut.util.algorithm.support; vq|o}6Et  
3>Ts7 wM  
import org.rut.util.algorithm.SortUtil; sBGYgBu!a  
M[N$N`9  
/** B:om61Dn  
* @author treeroot `x2Q:&.H`  
* @since 2006-2-2 (5y+g?9d;  
* @version 1.0 -NW7ncB|  
*/ Sdl1k+u  
public class QuickSort implements SortUtil.Sort{ L|Zja*  
,*SoV~  
/* (non-Javadoc) c=iv\hn  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kGsd3t!'  
*/ \M-}(>Pfk  
public void sort(int[] data) { ,"~#s(  
quickSort(data,0,data.length-1); RHc63b\  
} w,fA-*bZ 0  
private void quickSort(int[] data,int i,int j){ [;3` Aw  
int pivotIndex=(i+j)/2; jdsNZV  
file://swap =c 3;@CO  
SortUtil.swap(data,pivotIndex,j); Ww&~ZZZ {  
8.4 1EKr2  
int k=partition(data,i-1,j,data[j]); !P X`sIkT  
SortUtil.swap(data,k,j); bM[!E8dF  
if((k-i)>1) quickSort(data,i,k-1); <u2rb6  
if((j-k)>1) quickSort(data,k+1,j); `wRQ-<Y  
^a&-GhX;  
} 2JNO@  
/** &eYnO~$!  
* @param data O(U 'G|  
* @param i 1oq5|2p  
* @param j tJ>|t hk  
* @return jU\vg;nr  
*/ ?;Ck]l#5ys  
private int partition(int[] data, int l, int r,int pivot) { +cS%b}O`$  
do{ -F.A1{l[.  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); UV}\#86!  
SortUtil.swap(data,l,r); UX3 ]cr  
} /,v>w,  
while(l SortUtil.swap(data,l,r); wg<UCmfu!  
return l; %$K2$dq5  
} V7}5Zw1  
34ij5bko_)  
} 3T)GUzt`  
+L(0R&C  
改进后的快速排序: i;4|UeUl  
nX,2jT;@L  
package org.rut.util.algorithm.support; = WFn+#&^  
9aYDi)  
import org.rut.util.algorithm.SortUtil; ? +{=>{1  
y{CyjYpz^  
/** _&!%yW@  
* @author treeroot ~^#F5w"  
* @since 2006-2-2 #jdo54-  
* @version 1.0 6(1xU\x  
*/ zrD];DP  
public class ImprovedQuickSort implements SortUtil.Sort { &?\'Z~B4  
> <cK  
private static int MAX_STACK_SIZE=4096; 1<Fh aK  
private static int THRESHOLD=10; (#6E{@eq  
/* (non-Javadoc) rO8Q||@>A  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NHKIZx8sR  
*/ n3w(zB  
public void sort(int[] data) { ?' F>DN  
int[] stack=new int[MAX_STACK_SIZE]; .I%p0ds1r  
sU>!sxW  
int top=-1; HZ$q`e  
int pivot; gG;d+s1  
int pivotIndex,l,r; `uRf*-   
V\k?$}  
stack[++top]=0; L`E^BuP/  
stack[++top]=data.length-1; d5?"GFy  
S}zh0`+d'Z  
while(top>0){ =/xTUI4  
int j=stack[top--]; C1 qyjlR  
int i=stack[top--]; a&yIH;-  
XEd|<+P1  
pivotIndex=(i+j)/2; %si5cc?  
pivot=data[pivotIndex]; +[l52p@a  
V. sIiE  
SortUtil.swap(data,pivotIndex,j); ~I^}'^Dbb  
1 o5DQ'~n  
file://partition 6n9;t\'Gt  
l=i-1; 1]eh0H  
r=j; 4h:R+o ^H^  
do{ e~7h8?\.q  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); qkX}pQkG)h  
SortUtil.swap(data,l,r); DtBIDU]  
} 0fc]RkHs"  
while(l SortUtil.swap(data,l,r); B-63IN  
SortUtil.swap(data,l,j); ppcuMcR{  
[5&zyIi  
if((l-i)>THRESHOLD){ wm@ />X  
stack[++top]=i; 1S !<D)n  
stack[++top]=l-1; C:C9swik"5  
} @)0-oa,u+  
if((j-l)>THRESHOLD){ q7id?F}3&  
stack[++top]=l+1; "52nT  
stack[++top]=j; mG,%f"b0  
} oS'M  
bJ8~/d]+  
} DwTqj=l  
file://new InsertSort().sort(data); v@OyB7}  
insertSort(data); lNV%R(  
} BaSNr6 YW  
/** I W_:nm6  
* @param data [E_+fT  
*/ ~r~~0|=  
private void insertSort(int[] data) { qK ,mG {  
int temp; >pa tv  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); k&\YfE3*  
} UloZo? e`  
} }NQx2k0  
} l@}BWSx&ms  
Ve<3XRq|8  
} -BWkPq!  
!X 3/2KRP7  
归并排序: p^_E7k<ag  
[oOA@  
package org.rut.util.algorithm.support; ?Z}n0E `  
j\w>}Pc  
import org.rut.util.algorithm.SortUtil; )3i}(h0  
>-0b@ +j  
/** I+ipTeB^  
* @author treeroot ,z}wR::%  
* @since 2006-2-2 o6e6Jw  
* @version 1.0 $"Oy }  
*/ ;]<{ <czc  
public class MergeSort implements SortUtil.Sort{ ns.[PJ"8  
 )]2yTG[  
/* (non-Javadoc) @a.Y9;O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }`/wj  
*/ )N QtjB$  
public void sort(int[] data) { h3^ &,U  
int[] temp=new int[data.length]; -la~p~8  
mergeSort(data,temp,0,data.length-1); U:]b&I  
} l 6.#s3I['  
Ov{fO  
private void mergeSort(int[] data,int[] temp,int l,int r){ f[)_=T+  
int mid=(l+r)/2; s)]Z*#ZZ  
if(l==r) return ; M,[u}Rf^w  
mergeSort(data,temp,l,mid); ) Qve[O  
mergeSort(data,temp,mid+1,r); md[FtcY\  
for(int i=l;i<=r;i++){ CL(,Q8yG  
temp=data; ^&t(O1.-  
} I>b-w;cC  
int i1=l; +NRn>1]  
int i2=mid+1; hA`>SkO  
for(int cur=l;cur<=r;cur++){ 6p/gvpZ  
if(i1==mid+1) 7lpd$Y  
data[cur]=temp[i2++]; aE^tc'h~  
else if(i2>r) \K 01 F  
data[cur]=temp[i1++]; g j`"|  
else if(temp[i1] data[cur]=temp[i1++]; n3{m "h3  
else fM]McZ9)D  
data[cur]=temp[i2++]; ki6`d?  
} xh> /bU!>  
} H[%F o  
WG 9f>kE  
} to Ei4u)m  
(^g?/i1@d  
改进后的归并排序: ]?F05!$*  
9E _C u2B  
package org.rut.util.algorithm.support; pj,.RcH@o  
r;w_B%9  
import org.rut.util.algorithm.SortUtil; |7Z,z0 ?V  
>vg!<%]W]  
/** ]>@; 2%YvY  
* @author treeroot  l;>#O  
* @since 2006-2-2 {+[~;ISL  
* @version 1.0 %+$P<Rw7  
*/ xmtbSRgK9  
public class ImprovedMergeSort implements SortUtil.Sort { iUh_rX9A"  
Ms ?V1  
private static final int THRESHOLD = 10; RVfRGc^lK  
. iq.H  
/* [Dq7mqr$  
* (non-Javadoc) lwLK#_5u  
* R~b9)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?Gl'-tV  
*/ ovCk :Vz  
public void sort(int[] data) { ,TU!W|($  
int[] temp=new int[data.length]; uMF\3T(x4  
mergeSort(data,temp,0,data.length-1);  1$idF  
} B@*BcE?  
!?tWWU%P)  
private void mergeSort(int[] data, int[] temp, int l, int r) { |aN0|O2  
int i, j, k; fD q, )~D  
int mid = (l + r) / 2; kETA3(h'  
if (l == r) )iy>sa{  
return; tZ[BfO  
if ((mid - l) >= THRESHOLD) [p@NzS/  
mergeSort(data, temp, l, mid); 4:cbasy  
else mU_?}}aK,  
insertSort(data, l, mid - l + 1); &tZ?%sr  
if ((r - mid) > THRESHOLD) 6f=/vRAh$  
mergeSort(data, temp, mid + 1, r); 5S7`gN.  
else ^Gv<Xl  
insertSort(data, mid + 1, r - mid); sVkR7 ^KsG  
XrC{{K  
for (i = l; i <= mid; i++) { S^)r,cC  
temp = data; <E@ 7CG.=  
} GMU<$x8o  
for (j = 1; j <= r - mid; j++) { *cp|lW!ag  
temp[r - j + 1] = data[j + mid]; u7j-uVG  
} N(&FATZUW  
int a = temp[l]; Nl_!%k:  
int b = temp[r]; qx{.`AaZW  
for (i = l, j = r, k = l; k <= r; k++) { ,@='.Qs4g  
if (a < b) { 8<P$E!  
data[k] = temp[i++]; 2xe_Q70II  
a = temp; kVU|k-?2  
} else { v}z o v Ei  
data[k] = temp[j--]; LO.4sO  
b = temp[j]; zx-+u7qKH  
} :G^`LyOM  
} Vu\|KL|  
} R)cns7oW  
F.A<e #e?  
/** A&9l|b-"  
* @param data ~J<bwF  
* @param l O%o#CBf0  
* @param i NG'VlT  
*/ LEhku4U.  
private void insertSort(int[] data, int start, int len) { PR|Trnd&D  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z55,S=i  
} 77i |a]Kd  
} no?)GQ  
} &;)~bS(   
} r %0  
U_}$QW0'  
堆排序: !u6~#.7  
?RpT_u  
package org.rut.util.algorithm.support; #C+Gk4"w  
A</[Q>8  
import org.rut.util.algorithm.SortUtil; %hrv~=  
Qb|w\xT^Y  
/** ?qO,=ms>-  
* @author treeroot YfMe69/0I  
* @since 2006-2-2 hQL9 Zl~  
* @version 1.0 EE}NA{b  
*/ }#'KME4  
public class HeapSort implements SortUtil.Sort{ 8@h zw~>  
LOnhFX   
/* (non-Javadoc) MCh8Q|Yx4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "fpj"lf-  
*/ ]nX.zE|F  
public void sort(int[] data) { >.{ ..~"K  
MaxHeap h=new MaxHeap(); =AD/5E,3  
h.init(data); %4 SREq  
for(int i=0;i h.remove(); 3]N}k|lb%  
System.arraycopy(h.queue,1,data,0,data.length); h*MR5qa  
} "[[fQpe4@  
tMAa$XrZj  
private static class MaxHeap{ ^<E+7  
klf<=V  
void init(int[] data){ e<9nt [  
this.queue=new int[data.length+1]; o B6" D  
for(int i=0;i queue[++size]=data; /#:RYM'Tu  
fixUp(size); H&03>.b  
} |Y'$+[TE  
} K6Gc)jp:b  
3~cOQ%#]4  
private int size=0; A^K,[8VX  
M%B[>pONb7  
private int[] queue; l m  
e-e{-pB6  
public int get() { "L8V!M_e  
return queue[1]; \B}W(^\wg;  
} c<D Yk f  
Ra{B8)Q  
public void remove() { COHJJONR  
SortUtil.swap(queue,1,size--); mr('zpkRq  
fixDown(1); pRU6jV 6e)  
} 8W$="s2  
file://fixdown Q ,;x;QR4  
private void fixDown(int k) { N\uQ-XOi  
int j; Ec\x;li! *  
while ((j = k << 1) <= size) { .oK7E(QJ  
if (j < size %26amp;%26amp; queue[j] j++; &\"fH+S  
if (queue[k]>queue[j]) file://不用交换 QIV<!SO  
break; 6U&Uyd)  
SortUtil.swap(queue,j,k); z!3Z^d`  
k = j; rmabm\QY  
} %'=oMbi>i4  
} Qy70/on9  
private void fixUp(int k) { VuPET  
while (k > 1) { dt \O7Rjw8  
int j = k >> 1; <oXsn.'\  
if (queue[j]>queue[k]) i3%~Gc63  
break; ~qqtFjlG^  
SortUtil.swap(queue,j,k); <GNOT"z  
k = j; l?R_wu,Q  
} 0l:5hD,)F  
} eXOFAd]>u  
X~DXx/9  
} P9>C!0 -x  
6AwnmGL(;;  
} w-#0k.T  
H9>&"=".  
SortUtil: AN%.LK  
2ga}d5lu  
package org.rut.util.algorithm; RyhR#  
xg^fM@#m  
import org.rut.util.algorithm.support.BubbleSort; b@X@5SJFW  
import org.rut.util.algorithm.support.HeapSort; YpKai3 B  
import org.rut.util.algorithm.support.ImprovedMergeSort; d#d~t[=  
import org.rut.util.algorithm.support.ImprovedQuickSort; vJCL m/}*  
import org.rut.util.algorithm.support.InsertSort; }fCM_w  
import org.rut.util.algorithm.support.MergeSort; 5 rWRE-  
import org.rut.util.algorithm.support.QuickSort; )m'_>-`^:  
import org.rut.util.algorithm.support.SelectionSort; ZF t^q /pw  
import org.rut.util.algorithm.support.ShellSort; ..T (9]h  
IY19G U9  
/** Kulg84<AwM  
* @author treeroot B.G!7>=  
* @since 2006-2-2 f2u2Ns0Ym  
* @version 1.0 7wqwDE  
*/ #NE^f2  
public class SortUtil { *Vc=]Z2G^  
public final static int INSERT = 1; Tk!b`9  
public final static int BUBBLE = 2; `o3d@Vc  
public final static int SELECTION = 3; \k,bz 0  
public final static int SHELL = 4; M/DTD98'N  
public final static int QUICK = 5; 9F+bWo_m  
public final static int IMPROVED_QUICK = 6; >ahj|pm  
public final static int MERGE = 7; j41:]6  
public final static int IMPROVED_MERGE = 8; z K(5&u  
public final static int HEAP = 9; NN:TT\!v  
;MMFF{  
public static void sort(int[] data) { </=PN1=A  
sort(data, IMPROVED_QUICK); c[y8"M5  
} 1v4kN -  
private static String[] name={ wtUG2 (  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OL'=a|g|c  
}; 1P[Lz!C  
3a qmK.`H  
private static Sort[] impl=new Sort[]{ &f yFUg  
new InsertSort(), LF~#4)B  
new BubbleSort(), sZH7 EK  
new SelectionSort(), ~"mZ0 E  
new ShellSort(), {_~G+rqY  
new QuickSort(), GWVdNYpmr  
new ImprovedQuickSort(),  d!t@A  
new MergeSort(), (FaT{W{  
new ImprovedMergeSort(), nKO&ffb'<  
new HeapSort() } 8P}L@q  
}; #TgJ d  
[5VUcXGt*\  
public static String toString(int algorithm){ 1IV 0a  
return name[algorithm-1]; )1vojp 4Za  
} o W[,EW+u  
&rl>{Uvq  
public static void sort(int[] data, int algorithm) { $Y`aS^IW  
impl[algorithm-1].sort(data); "(N HA+s/  
} vO_quQ[.  
%p9bl ,x  
public static interface Sort { c6HU'%v  
public void sort(int[] data); x/7G0K2\}  
} 6.|~~/  
LU{Z  
public static void swap(int[] data, int i, int j) { wB)+og-^1f  
int temp = data; is(!_Iv  
data = data[j]; \uk#pL  
data[j] = temp; 9^^#I ~-  
} $<cZ<g5)  
} Fsf22  
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