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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。 %:eep G|  
插入排序: /M-%]sayj  
D+.h *{gD  
package org.rut.util.algorithm.support; a N|MBX;  
:>.~"uWo{  
import org.rut.util.algorithm.SortUtil; 3P!Jw7e  
/** 1Yy5bg6+E  
* @author treeroot E(e'qL  
* @since 2006-2-2 iG1vy'J#o  
* @version 1.0 ncluA~8  
*/ /?jAG3"  
public class InsertSort implements SortUtil.Sort{ tndtwM*B'  
I T)rhi:  
/* (non-Javadoc) / W}Za&]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0.+"K}  
*/ uOqWMRsoi  
public void sort(int[] data) { 1CiK&fQ'  
int temp; *FkG32k  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); | 1Fy  
} PEPBnBA&1  
} mlR*S<Z  
} !TRJsL8  
_-*Lj;^V  
} BC0T[o(f8  
x8 sSb:N  
冒泡排序: (L?fYSP!  
yFT)R hN  
package org.rut.util.algorithm.support; "$? f&*  
?#^_yd|<  
import org.rut.util.algorithm.SortUtil;  ? {Lp  
&Z_W*D  
/** W^W^5-'"D,  
* @author treeroot J3fcnI  
* @since 2006-2-2 qJj;3{X2  
* @version 1.0 $-$^r;  
*/ oXg KuR  
public class BubbleSort implements SortUtil.Sort{ 32=Gq5pOc  
N9D<wAK##)  
/* (non-Javadoc) A-O@e e  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U3 e3  
*/ +k'5W1e  
public void sort(int[] data) { ) =<,$|g  
int temp; w<*tbq  
for(int i=0;i for(int j=data.length-1;j>i;j--){ > _1*/o JO  
if(data[j] SortUtil.swap(data,j,j-1); zxtx~XO  
} 2;G^>BP<  
} \+E{8&TH'  
} bIP{DxKS  
} \FSkI0  
e uS"C*  
} (xJ6 : u  
aD,sx#g0  
选择排序: Efb>ZQ  
bE2^sx`(  
package org.rut.util.algorithm.support; k~u$&a  
xT I&X9P  
import org.rut.util.algorithm.SortUtil; 0A@'w*=  
5B!l6ST  
/** BF2,E<^A  
* @author treeroot cs7T AX  
* @since 2006-2-2 "_JGe#=  
* @version 1.0 aE6 I|6W?  
*/ =yiRB?  
public class SelectionSort implements SortUtil.Sort { 2JZf@x+}  
;}{%|UAsx  
/* V?v,q'? $  
* (non-Javadoc) C`3}7qi|C  
* 2/qP:3)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "#2z 'J  
*/ S*6P=O*  
public void sort(int[] data) { 1Tf"<D p  
int temp; pGz-5afL  
for (int i = 0; i < data.length; i++) { \~1M\gZP  
int lowIndex = i; Lc6Wj'G G  
for (int j = data.length - 1; j > i; j--) {  R:98'`X=  
if (data[j] < data[lowIndex]) { *z`_U]tP  
lowIndex = j; h8oG5|Y  
} $ +;`[b   
} @CU3V+  
SortUtil.swap(data,i,lowIndex); _niXl&C  
} -:`$8/A|  
} o&1ewE(O]  
'$W@I  
} s)#FqB8  
&IM;Yl  
Shell排序: (Bd8@}\u_  
NH$a:>  
package org.rut.util.algorithm.support; SsfnBCVR  
tK6z#)  
import org.rut.util.algorithm.SortUtil; d6-a\]gF  
ahA21W` k  
/** Zf |%t  
* @author treeroot kt.z,<w5O  
* @since 2006-2-2 W~+ ] 7<  
* @version 1.0 XKB)++Q=  
*/ tT87TmNsA  
public class ShellSort implements SortUtil.Sort{ |ul25/B B  
Mo|[Muj8b  
/* (non-Javadoc) <\GP\G  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2J =K\ L  
*/ LFob1HH*8  
public void sort(int[] data) { 9D++SU2 :}  
for(int i=data.length/2;i>2;i/=2){ ) f9f_^;  
for(int j=0;j insertSort(data,j,i); X>j% y7v  
} Oemi}  
} `:!mPNW#  
insertSort(data,0,1); t\E#8  
} xz5Jli  
jXkz,]Iy  
/** F6R+E;"4R'  
* @param data 5\}A8Ng  
* @param j L6Ykv/V  
* @param i 08{0i,Fs  
*/ XtVx H4q  
private void insertSort(int[] data, int start, int inc) { X[:Hp`_$  
int temp; .w\AyXp  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); +0\BI<aG  
} ]7n+|@3x  
} 2`I" QU  
} %Kx:'m%U  
{^2``NYM_  
} eWSA  
" l vPge  
快速排序: ciVN-;vi  
^%V'l-}/  
package org.rut.util.algorithm.support; lN#W  
v{ Md4 p  
import org.rut.util.algorithm.SortUtil; Tz3 L#0:j  
9 o6ig>C  
/** 9F)+p7VJq  
* @author treeroot n#Xi Co_\  
* @since 2006-2-2 "hi?/B#d  
* @version 1.0 ?47q0C  
*/ S/ )P&V%  
public class QuickSort implements SortUtil.Sort{ |oPCmsO3R{  
J3gJSRT@P  
/* (non-Javadoc) K>X#,lE-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ac}+U q  
*/ Ecp]fUQK  
public void sort(int[] data) { Y~#m-y  
quickSort(data,0,data.length-1); 4Ei*\:  
} ^WQ.' G5Q  
private void quickSort(int[] data,int i,int j){ #qY`xH'>  
int pivotIndex=(i+j)/2; YKKZRlQo  
file://swap )isz }?Dj  
SortUtil.swap(data,pivotIndex,j); NpqMdd   
B-PN +P2  
int k=partition(data,i-1,j,data[j]); -/rP0h5#  
SortUtil.swap(data,k,j); /]m5HW(P7K  
if((k-i)>1) quickSort(data,i,k-1); S0\QZ/je  
if((j-k)>1) quickSort(data,k+1,j); U8qb2'a8  
U;u@\E@2  
} ~kPHf_B;z  
/** ]W39HL  
* @param data $q,2VH:Ip  
* @param i -qaJ@T+J+7  
* @param j 5H#f;L\k  
* @return *Z\B9mx  
*/ U8Z(=*Z3  
private int partition(int[] data, int l, int r,int pivot) { .1<QB{4~v  
do{ P}hHx<L  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); t=o2:p6&  
SortUtil.swap(data,l,r); l Os91+.%  
} o0nd]"q?  
while(l SortUtil.swap(data,l,r); wm~35cF(  
return l; TG 9 a1q  
} '4k l$I  
]R[j ]E.  
} ? cU9~=  
KGb:NQ=O6i  
改进后的快速排序: .Qk T-12  
))m\d*  
package org.rut.util.algorithm.support; RQhS]y@e  
=p~k5k4  
import org.rut.util.algorithm.SortUtil; tb36c<U-  
\6A Yx[|  
/** hB/4.K]8  
* @author treeroot a!rU+hiC  
* @since 2006-2-2 __N< B5E  
* @version 1.0 VbX+`CwH  
*/ *YH5kX  
public class ImprovedQuickSort implements SortUtil.Sort { "IQ' (^-P  
>dO1)  
private static int MAX_STACK_SIZE=4096; R5OP=Q8  
private static int THRESHOLD=10; r Q)?Bhf  
/* (non-Javadoc) ZLm?8g6-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nk=+6r6  
*/ 2$ m#)*\  
public void sort(int[] data) {  %f3qCN  
int[] stack=new int[MAX_STACK_SIZE]; !YX$4_I  
d[K71  
int top=-1; &h^E_]P  
int pivot; }#%3y&7M7  
int pivotIndex,l,r; A$d)xq-]K  
&%eWCe+ +  
stack[++top]=0; @GTkS!86  
stack[++top]=data.length-1; +I~`Ob  
[ye!3h&]  
while(top>0){ pY@$N&+W  
int j=stack[top--]; pUbf]3 t  
int i=stack[top--]; L_4c~4  
; '6`hZ  
pivotIndex=(i+j)/2; WEy$SN+P  
pivot=data[pivotIndex]; { 3,_i66  
u}_,4J  
SortUtil.swap(data,pivotIndex,j); lGoP(ki  
TOF_m$@#  
file://partition 4mHR+SZy  
l=i-1; V9KI?}q:W  
r=j; 5PF?Eq   
do{ 0 PdeK'7  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); E3..$x-/  
SortUtil.swap(data,l,r); M9[52D!{  
} P;~`%,+S  
while(l SortUtil.swap(data,l,r); ?X $#J'U;  
SortUtil.swap(data,l,j); l$[7 pM[  
lL8pIcQW  
if((l-i)>THRESHOLD){ rK` x<  
stack[++top]=i; 287g 5  
stack[++top]=l-1; *LuR <V  
} Uk1|y\  
if((j-l)>THRESHOLD){ v@,n]"  
stack[++top]=l+1; H){}28dX  
stack[++top]=j; <O<Kf:i&c1  
} |h^[/  
6ij L+5  
} 1`6kc9f.  
file://new InsertSort().sort(data); @ FNaCmBX  
insertSort(data); stxei 6  
}  6chcpP0  
/** h2S!<  
* @param data TA4>12C6  
*/ 5:R$xgc  
private void insertSort(int[] data) { Zc!rL0T  
int temp; DsJ ikg(J  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 5r2A^<)  
} mYUR(*[  
} 1s-dqHz"s  
} ~Un+Zs%24  
8Cx6Me>,=  
}  lL\%eQ  
>b;o&E`\  
归并排序: 4*0C_F@RX  
sA(d_ Yu_  
package org.rut.util.algorithm.support; wak:"B[  
jm ORKX+)  
import org.rut.util.algorithm.SortUtil; ?T1vc  
q g2 fTe  
/** og[cwa_  
* @author treeroot % _.kd"  
* @since 2006-2-2 *;ehSg9  
* @version 1.0 xF8U )j !  
*/ d/&W[jJ  
public class MergeSort implements SortUtil.Sort{ a^vTBJXo  
iY,Ffu E  
/* (non-Javadoc) ZA1:Y{ V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ']bw37_U,  
*/ ! V^wq]D2  
public void sort(int[] data) { 4 EE7gkM5  
int[] temp=new int[data.length]; Tv[| ^G9x  
mergeSort(data,temp,0,data.length-1); Tv[h2_+E  
} a Fh9B\n  
y:HH@aa)  
private void mergeSort(int[] data,int[] temp,int l,int r){ Sj'Iz #  
int mid=(l+r)/2; d6+$[4w  
if(l==r) return ; 2RbK##`vC  
mergeSort(data,temp,l,mid); WrHY'  
mergeSort(data,temp,mid+1,r); L*6R5i>  
for(int i=l;i<=r;i++){ WEaG/)y  
temp=data; 1fH2obI~X  
} 8@ZZ[9kt  
int i1=l; T)Y{>wT  
int i2=mid+1; oNEjlV*  
for(int cur=l;cur<=r;cur++){ <da-iY\5  
if(i1==mid+1) |LLDaA-=0  
data[cur]=temp[i2++]; 7!;H$mxP  
else if(i2>r) ^j!2I&h1  
data[cur]=temp[i1++]; B7QRG0  
else if(temp[i1] data[cur]=temp[i1++]; f&L3M)T  
else RW`j^q,c3  
data[cur]=temp[i2++]; FoQy@GnM5  
} d=nv61]  
} 9oU1IT9   
('~}$%C  
} Yycfb  
V/&JArW  
改进后的归并排序: ]*Cq'<h$  
'" 4;;(  
package org.rut.util.algorithm.support; [C#H _y(  
V8hmfV~=]P  
import org.rut.util.algorithm.SortUtil; oh0*bh  
[.Rdq]w6  
/** yU"lJ>Eh}}  
* @author treeroot uXouN$&  
* @since 2006-2-2 ge4QaK  
* @version 1.0 <nk9IAH  
*/ ;Rf@S$  
public class ImprovedMergeSort implements SortUtil.Sort { s'^sT=b  
7>V*gV?v  
private static final int THRESHOLD = 10; zCdcwTe  
p:;`X!  
/* %Ze]6TP/><  
* (non-Javadoc) L O;?#e7  
* :V0sKg|sS  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g)1`A 24  
*/ sj3[ny;b  
public void sort(int[] data) { yBRYEqS+  
int[] temp=new int[data.length]; h0&Oy52  
mergeSort(data,temp,0,data.length-1); l*w*e.ezQ  
} hLr\;Swyp  
iv ~<me0F  
private void mergeSort(int[] data, int[] temp, int l, int r) { 7O-fc1OTv  
int i, j, k; P~*'/!@  
int mid = (l + r) / 2; a$5P\_  
if (l == r) x#XxD<y  
return; G ?Hx"3:?  
if ((mid - l) >= THRESHOLD) 5uX-onP\[  
mergeSort(data, temp, l, mid); W6s-epsRmT  
else gW-mXb  
insertSort(data, l, mid - l + 1); /PKu",Azj  
if ((r - mid) > THRESHOLD) Mi} .  
mergeSort(data, temp, mid + 1, r); n%6ba77  
else *zwo="WA\t  
insertSort(data, mid + 1, r - mid); aH_0EBRc  
+i~kqiy.  
for (i = l; i <= mid; i++) { T0{X,  
temp = data; v,kvLjqt  
} v?YxF}  
for (j = 1; j <= r - mid; j++) { |=:<[FU  
temp[r - j + 1] = data[j + mid]; 9&bJ]  
} C~IE_E&Q`  
int a = temp[l]; NM"5.   
int b = temp[r]; ]*hH.ZBY"^  
for (i = l, j = r, k = l; k <= r; k++) { Pj1k?7  
if (a < b) { F_Gc_eT  
data[k] = temp[i++]; RF= $SMTk  
a = temp; ^ X-6j[".  
} else { P  Ij  
data[k] = temp[j--]; ?vfZ>7Q  
b = temp[j]; r&+w)U~  
} c,:nWf  
} p^1~o/  
} @ qS Z=  
/ E!N:g<  
/** z%1& t4$  
* @param data 0DFVB%JdI  
* @param l DKF` xuJP  
* @param i Ae%AG@L  
*/ _\gCdNrD  
private void insertSort(int[] data, int start, int len) { ]v]tBVO$  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "d`u#YmR  
} 7&dK_x,a  
} $*:g~#bh  
} N@Q_5t0bk  
} a2[rY  
>Q=Q%~  
堆排序: P;eXUF+jn  
B1A:}#  
package org.rut.util.algorithm.support; Q_Wg4n5  
`2/V.REX$h  
import org.rut.util.algorithm.SortUtil; yJ="dEn>i"  
dZox;_b  
/** {:|b,ep T  
* @author treeroot tAPf#7{|   
* @since 2006-2-2 !;4Hh)2  
* @version 1.0 v o4U%  
*/ K $WMrp  
public class HeapSort implements SortUtil.Sort{ +4Fw13ADE  
1Ko4O)L]&  
/* (non-Javadoc) +i#s |kKs\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }>EWF E`  
*/ H:P7G_!\  
public void sort(int[] data) { K)  Ums-b  
MaxHeap h=new MaxHeap(); !L@<?0x LW  
h.init(data); Bg] %  
for(int i=0;i h.remove(); Omi/sKFMi  
System.arraycopy(h.queue,1,data,0,data.length); I9dX\w}  
} Y^nm{;G+  
5,4m_fBoW  
private static class MaxHeap{ {9@u:(<X9  
UmArl)R/  
void init(int[] data){ nwMq~I*1  
this.queue=new int[data.length+1]; _ds;:*N+qA  
for(int i=0;i queue[++size]=data; %E"v@  
fixUp(size); {VXucGI|  
} 2liJ^ `  
} do*aE  
D&@Iuo  
private int size=0; ?bpV dm!  
-:kIIK   
private int[] queue; J"Fp),  
(L1F ],Au  
public int get() { >_\[C?8  
return queue[1]; `H 'wz7  
} ^KnK \  
BOh^oQh  
public void remove() { B[q"o I`  
SortUtil.swap(queue,1,size--); xQ2: tY#?  
fixDown(1); CB X}_]9X  
} 1 +Ue m  
file://fixdown 1J72*`4OK  
private void fixDown(int k) { S;y4Z:!  
int j; E [6:}z<  
while ((j = k << 1) <= size) { n @,.  
if (j < size %26amp;%26amp; queue[j] j++; CxN xb)c &  
if (queue[k]>queue[j]) file://不用交换 pp@B]We  
break; Ni%@bU $  
SortUtil.swap(queue,j,k); @SyL1yFX  
k = j; 7xQ:[P!G+  
} hu1ZckIw?  
} }'faf{W  
private void fixUp(int k) { Yg,;l-1  
while (k > 1) { ,<'>j a C  
int j = k >> 1; d S'J@e=#  
if (queue[j]>queue[k]) l^$'6q"  
break; $:\`E 56\  
SortUtil.swap(queue,j,k); 5KDCmw  
k = j; oH!O{pQK}  
} ,QpFVlPU  
} gWoUE7.3`  
~ rQ,%dH  
} ?Pa(e)8\  
/%s:aO  
} r/HCWs|  
7(oA(l1V  
SortUtil: VX82n,'=t  
TVx `&C+  
package org.rut.util.algorithm; "wuO[c&%/  
jd,i=P%  
import org.rut.util.algorithm.support.BubbleSort; ~%C F3?e6  
import org.rut.util.algorithm.support.HeapSort; lG Bg8/[  
import org.rut.util.algorithm.support.ImprovedMergeSort; #9Jr?K43  
import org.rut.util.algorithm.support.ImprovedQuickSort; n>R(e>  
import org.rut.util.algorithm.support.InsertSort; ,lStT+A  
import org.rut.util.algorithm.support.MergeSort; 1_#;+S  
import org.rut.util.algorithm.support.QuickSort; E1tCY.N{  
import org.rut.util.algorithm.support.SelectionSort; dq`{fqGl  
import org.rut.util.algorithm.support.ShellSort; 8e3eQ  
K!.t}s.t  
/** q*|Alrm  
* @author treeroot EFljUT?&  
* @since 2006-2-2 K5|~iW'  
* @version 1.0 >Q!}tbg~9  
*/ HZZZ [km  
public class SortUtil { P.5l9N s(O  
public final static int INSERT = 1;  oC*a;o  
public final static int BUBBLE = 2; #{{p4/:  
public final static int SELECTION = 3; u '/)l}  
public final static int SHELL = 4; aK95&Jyw&  
public final static int QUICK = 5; =JgR c7  
public final static int IMPROVED_QUICK = 6; R ZQH#+*t}  
public final static int MERGE = 7; 1:<(Q2X%  
public final static int IMPROVED_MERGE = 8; rhy-o?  
public final static int HEAP = 9; } `r.fD  
U1X"UN)  
public static void sort(int[] data) { ZQ+DAX*MS  
sort(data, IMPROVED_QUICK); :i4(cap&}F  
} -{ 1P`&G  
private static String[] name={ <Q/)SN6_E  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ul9^"o  
}; K%+4M#jj5  
W dD889\  
private static Sort[] impl=new Sort[]{ oKCy,Ot<  
new InsertSort(), /\b* oPWJ  
new BubbleSort(), 9\<q =p~  
new SelectionSort(), o2U5irU  
new ShellSort(), yDKH;o  
new QuickSort(), )J> dGIb  
new ImprovedQuickSort(), "q+Z*   
new MergeSort(), gqy>;A:kO  
new ImprovedMergeSort(), 1' U  
new HeapSort() ?%UiW7}j';  
}; oJr+RO  
p|2GPrA]aL  
public static String toString(int algorithm){ -43>?m/a  
return name[algorithm-1]; B I)@n:p  
} qvB{vU  
|cY,@X,X6  
public static void sort(int[] data, int algorithm) { R$hIgw+p[  
impl[algorithm-1].sort(data); ~M{/cv  
} ; Z7!BU  
h7q{i|5  
public static interface Sort { 5rB>)p05[  
public void sort(int[] data); 4RB%r  
} gM>?w{!LBx  
<_<zrXc]  
public static void swap(int[] data, int i, int j) { g"5Kth  
int temp = data; GZu12\0nZ  
data = data[j]; |<h}'  
data[j] = temp; $V!.z%Vgf  
} XV]xym~  
} 7;AK=;  
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