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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。 z>HM$n`YD  
插入排序: \98|.EG  
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package org.rut.util.algorithm.support; o;v_vCLO  
D.YT u$T  
import org.rut.util.algorithm.SortUtil; SpM Hq_MLM  
/** W . dm1  
* @author treeroot lrmz'M'  
* @since 2006-2-2 >L^ 2Z*  
* @version 1.0 8*sP  
*/ }q)dXFL=I#  
public class InsertSort implements SortUtil.Sort{ Sj;:*jk!h  
/< \do 1  
/* (non-Javadoc) 3JZ9 G79H  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :+ AqY(Gz  
*/ (X|lK.W y  
public void sort(int[] data) { |Gt]V`4  
int temp; m$bNQ7  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 6~Y`<#X5J  
} cK t8e^P  
} mam(h{f$  
} `3vt.b  
k&o1z'<C  
} = $6pL  
FD^s5>"Y+  
冒泡排序: I z)~h>-F  
Lu~M=Fh  
package org.rut.util.algorithm.support; 5dhT?/qvc  
h|.*V$3  
import org.rut.util.algorithm.SortUtil; Cc` )P>L  
Jek)`D  
/** UzUt=s!^H  
* @author treeroot 6M@m`c  
* @since 2006-2-2 -42jeJS  
* @version 1.0 XLFo"f  
*/ vLh,dzuo  
public class BubbleSort implements SortUtil.Sort{ G `JXi/#`  
1 =9 Kwd  
/* (non-Javadoc) G 4 C 7  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N,u~ZEI  
*/ B#(2,j7M  
public void sort(int[] data) { #zw 'H9l  
int temp; t 5  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ' Y.s}Duj  
if(data[j] SortUtil.swap(data,j,j-1); VTxLBFK;  
} qEB]Tj e[  
} qU:Mvb^5&  
} [&p^h  
} 06vxsT@  
JheF}/Bx  
} P7kb*  
oj~0zJI  
选择排序: r!J?Lc])8  
U/bQ(,3}  
package org.rut.util.algorithm.support; K~aI Y0=<  
:1\QM'O  
import org.rut.util.algorithm.SortUtil; }mSfg  
olO&7jh7|  
/** \i$WXW]|  
* @author treeroot 3ws}E6\D  
* @since 2006-2-2 bol#[_~  
* @version 1.0 }w8:`g'T0/  
*/ I!sB$=n  
public class SelectionSort implements SortUtil.Sort { o]|a5. O  
P(&9S`I  
/* =e$6o2!'}  
* (non-Javadoc) GS4 HYF  
* |,Xrt8O/[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0 SeDBs  
*/ z`[q$H7?  
public void sort(int[] data) { tJ,x>s?Y  
int temp; ^UAL5}CQt  
for (int i = 0; i < data.length; i++) { 'Nbae-pf  
int lowIndex = i; #7~M1/eH=t  
for (int j = data.length - 1; j > i; j--) { |4s`;4c&  
if (data[j] < data[lowIndex]) { ^#VyIF3q  
lowIndex = j; &18CCp\3)c  
} Z;#Ei.7p|  
} HrZ\=1RB  
SortUtil.swap(data,i,lowIndex); ymLhSF][  
} RjS&^u aP  
} 9ZEF%&58Y  
UldG0+1d  
} :}Tw+S5  
,Si23S\  
Shell排序: `2@t) :  
. 787+J?  
package org.rut.util.algorithm.support; .V?i3  
gB\KD{E  
import org.rut.util.algorithm.SortUtil; .Qp5wCkM  
{{?[b^  
/** e'c~;Z\A  
* @author treeroot / ` 7p'i  
* @since 2006-2-2 pA*cF!tq 7  
* @version 1.0 rI5)w_E?  
*/ . ` OdnLGy  
public class ShellSort implements SortUtil.Sort{ j 6~#_t[  
Ny>tJ~I  
/* (non-Javadoc) T/" 6iv\1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~5HI9A4^  
*/ c D+IMlT  
public void sort(int[] data) { rZDlPp>BPZ  
for(int i=data.length/2;i>2;i/=2){ c%aY6dQG&%  
for(int j=0;j insertSort(data,j,i); L!7*U.+  
} O7shY4Sr  
} Uu9\;f  
insertSort(data,0,1); 7B$iM,}.b  
} OgNt"Vg  
)jK"\'cK  
/** =>Vo|LBoe  
* @param data Nkt(1?:-'  
* @param j P+sxlf:0  
* @param i `?Yh`P0  
*/ T1p A <6  
private void insertSort(int[] data, int start, int inc) { xV'\2n=1T  
int temp; DYU+?[J  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); <a|$ Bl  
} ~O~c^fLH(B  
} J'O</o@e  
} CUT D]:\  
M* (]hu0!  
} IIY_Q9in  
Xxh^4vKjX  
快速排序: -S]ercar  
Pq+|*Y<|&  
package org.rut.util.algorithm.support; [/hoNCH!  
'vVt^h2  
import org.rut.util.algorithm.SortUtil; kXhd]7ru  
;q-c[TZC  
/** Cu%BU}(  
* @author treeroot >b\|%=(x!*  
* @since 2006-2-2 ~`e!$=  
* @version 1.0 ?& :N|cltD  
*/ aOg9Dqtg)f  
public class QuickSort implements SortUtil.Sort{ A*0X ~6W  
+arh/pd_I  
/* (non-Javadoc) [.|& /O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [K #$W  
*/ `/m] K ~~  
public void sort(int[] data) { n5 ~Dxk  
quickSort(data,0,data.length-1); _`=qc/-0  
} RvA "ug.*  
private void quickSort(int[] data,int i,int j){ m %+'St|qr  
int pivotIndex=(i+j)/2; f 1SKOq  
file://swap W<&/5s  
SortUtil.swap(data,pivotIndex,j); ]v:,<=S  
V8F! o  
int k=partition(data,i-1,j,data[j]); %fld<O  
SortUtil.swap(data,k,j); uu]C;wl  
if((k-i)>1) quickSort(data,i,k-1); kPy7e~  
if((j-k)>1) quickSort(data,k+1,j); A iR#:r  
,~$sJ2 g7  
} iDDq<a.A  
/** hs+)a%A3G  
* @param data EK>x\]O%T  
* @param i T@vE@D  
* @param j L=#B>Eu  
* @return F6CuY$0m=  
*/ )$Ib6tYY  
private int partition(int[] data, int l, int r,int pivot) { NlhC7  
do{ h{HpI 0q4  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 7C2Xy>d~  
SortUtil.swap(data,l,r); ]D@aMC$#  
} zuMz6#aCC8  
while(l SortUtil.swap(data,l,r); gmTBp}3  
return l; JK{2 hr_a  
} G1X73qoHT<  
e 0$m<5  
} .I{u[ "  
Z1W%fT  
改进后的快速排序: dc emF  
N>L)2WKFT  
package org.rut.util.algorithm.support; K7x;/O  
:L:] 3L  
import org.rut.util.algorithm.SortUtil; Z< C39s  
]_s;olKNI  
/** x=K'Jj  
* @author treeroot n~>b}DY  
* @since 2006-2-2 k<fR)o  
* @version 1.0 wuCZz{c7  
*/ *.$ov<E.  
public class ImprovedQuickSort implements SortUtil.Sort { b+AxTe("  
g~|x^d^;|  
private static int MAX_STACK_SIZE=4096; iH>JR[A  
private static int THRESHOLD=10; .d#Hh&jj  
/* (non-Javadoc) M?gZKdj  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |tY6+T}  
*/ mT j  
public void sort(int[] data) { <VN< ~sz  
int[] stack=new int[MAX_STACK_SIZE]; %0815 5M  
2l+'p[b0>  
int top=-1; h52+f  
int pivot; i7\>uni  
int pivotIndex,l,r; s!Id55R]  
,pZz`B#  
stack[++top]=0; P4MP`A  
stack[++top]=data.length-1; Pqvj0zUo$  
KJ-Q$ M  
while(top>0){ &7,/^ >">  
int j=stack[top--]; N'5DB[:c:  
int i=stack[top--]; FNl^ lj`Y  
@6U&7!  
pivotIndex=(i+j)/2; @X/-p3729  
pivot=data[pivotIndex]; (Zy=e?E,  
jNIz:_c-~  
SortUtil.swap(data,pivotIndex,j); oY@]&A^ah  
</fTn_{2s8  
file://partition e [F33%  
l=i-1; )pey7-P7g5  
r=j; 6|Rj YX  
do{ DEv,!8  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); KA`)dMWL  
SortUtil.swap(data,l,r); D{t0OvQag  
} 5kv]k?   
while(l SortUtil.swap(data,l,r); r7)iNTQ1  
SortUtil.swap(data,l,j); ."q8 YaW  
R?*-ZI[>w  
if((l-i)>THRESHOLD){ Hc q@7g  
stack[++top]=i; Gg7ZSB 7  
stack[++top]=l-1; C|ou7g4'p  
} S7hfwu&7F  
if((j-l)>THRESHOLD){ RQn3y-N]  
stack[++top]=l+1; y+VR D  
stack[++top]=j; AkqGk5e ^  
} AWmJm)   
%__.-;)o  
} l %xeM !}  
file://new InsertSort().sort(data); {O[ !*+O  
insertSort(data); ewinG-hX_  
} ZOzyf/?.  
/** )4/UzR$  
* @param data a@gm r%C  
*/ L\kT9wWK|  
private void insertSort(int[] data) { 0k|/]zfb  
int temp; l_=kW!l  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); _k W:FB  
} 6HR*)*>z_  
} &sPu 3.p  
} q/YO5>s15  
),I7+rY  
} [6Nzz]yy  
S4X['0rX!  
归并排序: x6*.zo5e  
 *FoPs  
package org.rut.util.algorithm.support; =}4lx^`oeT  
M7IQJFra  
import org.rut.util.algorithm.SortUtil; @Cd}1OT)  
X 7"hTD  
/** >za=v  
* @author treeroot $L$GI~w/  
* @since 2006-2-2 8 K>Ejr  
* @version 1.0 kPZ1OSX  
*/ W.U|mNJ$  
public class MergeSort implements SortUtil.Sort{ ]z/  
-wV0Nv(V8  
/* (non-Javadoc) H~"XlP  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fYv{M;  
*/ (wsvj61  
public void sort(int[] data) { 5B=Wnau  
int[] temp=new int[data.length]; p}swJ;S  
mergeSort(data,temp,0,data.length-1); ^l/$ 13=  
} Pi|oO-M  
mJ5LRpXN  
private void mergeSort(int[] data,int[] temp,int l,int r){ N[,/VCW  
int mid=(l+r)/2;  7QkAr  
if(l==r) return ; C(*)7| m  
mergeSort(data,temp,l,mid); cM'5m  
mergeSort(data,temp,mid+1,r); YPq`su7m9  
for(int i=l;i<=r;i++){ S$I:rbc  
temp=data; }UWRH.;v  
} Jid:$T>  
int i1=l; k||DcwO  
int i2=mid+1; rJm%qSZz  
for(int cur=l;cur<=r;cur++){ QcQ|,lA.HI  
if(i1==mid+1) @V-CG!  
data[cur]=temp[i2++]; FR@ dBcJUU  
else if(i2>r) cBA2;5E  
data[cur]=temp[i1++]; 0IM#T=V  
else if(temp[i1] data[cur]=temp[i1++]; ]g; K_>@  
else 7e"(]NC84  
data[cur]=temp[i2++]; M O/-?@w  
} 3,B[%!3d  
} AH], >i3  
" ,rA  
} ~dwl7Qc  
=kLg)a |  
改进后的归并排序: vu.f B4  
HnqZ7%jeN  
package org.rut.util.algorithm.support; .9g\WH#qD|  
q9pcEm4?  
import org.rut.util.algorithm.SortUtil; )V}u1C-N  
\ca4X{x  
/** [P{Xg:0  
* @author treeroot $P@P}%2  
* @since 2006-2-2 +T^m  
* @version 1.0 "v3u$-xN1  
*/ 9H3#8T] ;  
public class ImprovedMergeSort implements SortUtil.Sort { }Gz"og*8  
RGtUKr'  
private static final int THRESHOLD = 10; =4MiV]  
Qg _?..%  
/* 6<t\KMd  
* (non-Javadoc) T+4Musu{V  
* g%=\Wiit]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qW<: `y  
*/ 8a)EL*LH`  
public void sort(int[] data) { d*>M<6b-  
int[] temp=new int[data.length]; }}(~'  
mergeSort(data,temp,0,data.length-1); Qw5M\   
} ~0 FqY &4  
O.K8$  
private void mergeSort(int[] data, int[] temp, int l, int r) { KQ9:lJKr  
int i, j, k; SKfv.9  
int mid = (l + r) / 2; iy: ;g  
if (l == r) >v<}$v6D~  
return; H[Pb Wy:  
if ((mid - l) >= THRESHOLD) cW GU?cv}  
mergeSort(data, temp, l, mid); KuI>:i;  
else Mc6Cte]3|  
insertSort(data, l, mid - l + 1); %""CacX  
if ((r - mid) > THRESHOLD) *BO4"3Z  
mergeSort(data, temp, mid + 1, r); Mm[%v t40  
else {G{@bUG]p  
insertSort(data, mid + 1, r - mid); 'b^:"\t'Rh  
Vd1K{rH#  
for (i = l; i <= mid; i++) { *<A;jP  
temp = data; [X~X?By>  
} q3P3euK3  
for (j = 1; j <= r - mid; j++) { 4rzioIk  
temp[r - j + 1] = data[j + mid]; O@=mN*<gg0  
} "4?hK  
int a = temp[l]; iN {TTy  
int b = temp[r];  7:p]~eM)  
for (i = l, j = r, k = l; k <= r; k++) { bA^a@ lv a  
if (a < b) { ^LcI6 h  
data[k] = temp[i++]; =4%C?(\  
a = temp; lb6s3b  
} else { 8 [."%rzN  
data[k] = temp[j--]; EqmJXDm  
b = temp[j]; 6aK--k  
} JZnWzqFw  
} &4%J35~  
} .6;B3  
aw4+1.xy  
/** P3 Evv]sB@  
* @param data -$kJERvy  
* @param l {pg@JA  
* @param i 1!C,pXU#:  
*/ @} Z/{Z[@  
private void insertSort(int[] data, int start, int len) { G7202(w <  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ).boe& .  
} $^XPk#$m  
} H'`(|$:|  
} U`Ag|R  
} >V$#Um?AXj  
c\'pA^m 6  
堆排序: 6K y;1$  
$"(YE #]|  
package org.rut.util.algorithm.support; H44&u](8{  
D6oby*_w  
import org.rut.util.algorithm.SortUtil; yfW^wyDd2o  
j)DZmGg&t  
/** <`*P/V  
* @author treeroot Os!22 O  
* @since 2006-2-2 kC5,yj  
* @version 1.0 S}f<@-16P  
*/ |*NrS<"  
public class HeapSort implements SortUtil.Sort{ O*v+<|0!l  
xwxjj  
/* (non-Javadoc) QX=;,tr  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]."c4S_)|  
*/ 1Qu,]i`  
public void sort(int[] data) { c):*R ]=  
MaxHeap h=new MaxHeap(); 90ag!   
h.init(data); $?-o  
for(int i=0;i h.remove(); {wXN kq  
System.arraycopy(h.queue,1,data,0,data.length); IpXhb[UZ?  
} /xbZC{R  
&RrQ()<as  
private static class MaxHeap{ an`(?6d  
d@4!^vD;  
void init(int[] data){ s3Ce]MH  
this.queue=new int[data.length+1]; 3/=QZ8HA&-  
for(int i=0;i queue[++size]=data; Nt-SCLDM  
fixUp(size); \=V[ba:q  
} 5(7MQuRR  
} 9p rsL#Fn  
Jwt I(>cI  
private int size=0; }2A1Yt:^P  
[5*-V^m2  
private int[] queue; si_ HN{  
c\{}FGC  
public int get() { .l5" X>  
return queue[1]; G)Bq?=P  
} LC\:xia{X  
s7i.p]  
public void remove() { G?d,$NMo|  
SortUtil.swap(queue,1,size--); %*q0+_  
fixDown(1); mh7sY;SvM  
} \g1@A"  
file://fixdown },aWCvJL  
private void fixDown(int k) { .^IhH|U  
int j; x <\D@X^  
while ((j = k << 1) <= size) { &N_c-@2O  
if (j < size %26amp;%26amp; queue[j] j++; +Z<Q^5w@  
if (queue[k]>queue[j]) file://不用交换 &qP-x98E?  
break; [ky6E*dV`  
SortUtil.swap(queue,j,k); ?b7g9 G4  
k = j; UZ\*]mxT  
} y*b.eO  
} Cm;qDvj+u  
private void fixUp(int k) { Gb|}Su  
while (k > 1) { N[<`6dpE  
int j = k >> 1; niHL/\7u  
if (queue[j]>queue[k]) _6UAeZ*M  
break; "SU-^z  
SortUtil.swap(queue,j,k); H'GYJ ?U"  
k = j; m_"p$m;  
} a950M7  
} zL},`:(.  
(5q%0|RzRs  
} Fv);5LD  
A$%!9Cma  
} hJ[mf1je=  
P b8Z))9j  
SortUtil: IbJ[Og^Qyu  
d[]p_oIQq  
package org.rut.util.algorithm; [)SR $/A  
\;*}zX  
import org.rut.util.algorithm.support.BubbleSort; '#N5i  
import org.rut.util.algorithm.support.HeapSort; MFH"$t+  
import org.rut.util.algorithm.support.ImprovedMergeSort; jfY{z=*]u  
import org.rut.util.algorithm.support.ImprovedQuickSort; C. Ja;RFq  
import org.rut.util.algorithm.support.InsertSort; Lubs{-5lk  
import org.rut.util.algorithm.support.MergeSort; GX@W"y  
import org.rut.util.algorithm.support.QuickSort; fcE)V#c"g  
import org.rut.util.algorithm.support.SelectionSort; t+ S~u^  
import org.rut.util.algorithm.support.ShellSort; xEiX<lguyN  
;sChxQ=.^  
/** |#&V:GZp  
* @author treeroot `B'4"=(  
* @since 2006-2-2 $,;S\JmWP  
* @version 1.0 .'S^&M/$  
*/ ^b"bRQqm  
public class SortUtil { MxgLzt Y  
public final static int INSERT = 1; t[?a @S~6  
public final static int BUBBLE = 2; =F'M~3M   
public final static int SELECTION = 3; 2>$F0 M  
public final static int SHELL = 4; %K^gUd>,R  
public final static int QUICK = 5; \o B'  
public final static int IMPROVED_QUICK = 6; 8jjFC9Cbn0  
public final static int MERGE = 7; Vm~qk  
public final static int IMPROVED_MERGE = 8; SH vaV[C  
public final static int HEAP = 9; z+k=|RMau  
$7UoL,N>  
public static void sort(int[] data) { $U>/i@D  
sort(data, IMPROVED_QUICK); g8I!E$  
} 5pM&h~M  
private static String[] name={ xJ~ gT  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Har~MO?A  
}; qX5yN| A4  
[0&'cu>  
private static Sort[] impl=new Sort[]{ (T|TEt  
new InsertSort(), N-2([v  
new BubbleSort(), Ufdl|smt1  
new SelectionSort(), ^sifEgG*d  
new ShellSort(), .hX0c"f]b  
new QuickSort(), ^kn ^CI6  
new ImprovedQuickSort(), GIm " )}W  
new MergeSort(), gB>imr#e&  
new ImprovedMergeSort(), `KpFH.k.K  
new HeapSort() bmOqeUgB  
}; N0Efw$u  
, 3X: )  
public static String toString(int algorithm){ .xGo\aD  
return name[algorithm-1]; =&A!C"qK4[  
} 0#oBXu  
u8YB)kG  
public static void sort(int[] data, int algorithm) { Kt W6AZJ  
impl[algorithm-1].sort(data); B<|VeU  
} }* QO]_U?  
_eJXi,  
public static interface Sort { T><{ze  
public void sort(int[] data); 7}be>(  
} q!6|lZB3  
^GMJ~[]  
public static void swap(int[] data, int i, int j) { 9W!8gCs  
int temp = data; Hjs }  
data = data[j]; ~U6" ?  
data[j] = temp; ' .B.V?7  
} 4% HGMr  
} A1^Ga5 B>  
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