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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。 3G9AS#-C  
插入排序: Fm,} sP"Qx  
f[$9k}.  
package org.rut.util.algorithm.support; dab[x@#r>  
({l!'>?  
import org.rut.util.algorithm.SortUtil; c N^,-~U  
/** 1> wt  
* @author treeroot UB&)U\hn  
* @since 2006-2-2 (y;8izp9!  
* @version 1.0 2O~I.(9(  
*/ XkJzt  
public class InsertSort implements SortUtil.Sort{ qGgqAF#B  
l: X]$2;  
/* (non-Javadoc) u%`4;|tI  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S/l?wwD  
*/ +ysP#uAA  
public void sort(int[] data) { \JX.)&> -  
int temp; I_/kJ#7vj  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); kH10z~(e  
} A! j4;=}  
} <u9U%V si  
} %}%vey  
d,0Yi u.p  
} r\sQ8/  
k2S6 SB  
冒泡排序: MX.=k>  
=5yI>A0  
package org.rut.util.algorithm.support; E*_lT`Hzf  
V$7SVq  
import org.rut.util.algorithm.SortUtil; TtaVvaz~>  
)^o7%KX  
/** ctg[C$<q|  
* @author treeroot s]p3dB#  
* @since 2006-2-2 hiN6]jL|O  
* @version 1.0 RO1xcCp  
*/ 9G'Q3? z  
public class BubbleSort implements SortUtil.Sort{ D{!NTr  
"77 j(Vs9  
/* (non-Javadoc) `1$7. ydQ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vgh_F8G!V  
*/ RW@sh9  
public void sort(int[] data) { k 8Swra?j  
int temp; k!lz_Y  
for(int i=0;i for(int j=data.length-1;j>i;j--){ l'2a?1/q  
if(data[j] SortUtil.swap(data,j,j-1); I}aiy.l  
} @I '_  
} %kg%ttu7  
} 6k=ink-/  
} T"2D<7frbo  
;&Oma`Ec  
} 9rn[46s`  
>|[74#}7  
选择排序: MOIH%lpe  
,\FJVS;NeJ  
package org.rut.util.algorithm.support; Y M_\ ZK:  
i-b++R/WN  
import org.rut.util.algorithm.SortUtil; 7xOrG],E  
wER>a (  
/** '14 G0<;yL  
* @author treeroot 54Baz  
* @since 2006-2-2 xM/B"SG2  
* @version 1.0 i 7fQj, q  
*/ poqx O  
public class SelectionSort implements SortUtil.Sort { Bk~lE]Q3c7  
,\|W,N}~  
/* 9W{=6D86e  
* (non-Javadoc) }lk_Oe1  
* 8W]6/st?]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2B# ]z  
*/ ,4-)  e  
public void sort(int[] data) { )k.[Ve  
int temp; 'wd-!aZAd  
for (int i = 0; i < data.length; i++) { SY` U]-h  
int lowIndex = i; IQS:tL/  
for (int j = data.length - 1; j > i; j--) { T>&d/$;]  
if (data[j] < data[lowIndex]) { wnL\.%Y^  
lowIndex = j; 0wLu*K5$4E  
} d (Fb_  
} D! 1oYr  
SortUtil.swap(data,i,lowIndex); E0<9NF Qr7  
} aMSX"N"ot  
} -|MeC  
`o 6Hm  
} ag-\(i;K]  
/.<T^p@\&  
Shell排序: vMiZ:*iaj@  
Bf;dp`(/   
package org.rut.util.algorithm.support; 8"4&IX  
lEBt<  
import org.rut.util.algorithm.SortUtil; ,OX(z=i_  
 #cqia0.H  
/** gc 14%  
* @author treeroot S=>54!{`x  
* @since 2006-2-2 S;[*5g6a&x  
* @version 1.0 W27EU/+3  
*/ iw\RQ 0  
public class ShellSort implements SortUtil.Sort{ ec: ?Q0  
ISI\< qx  
/* (non-Javadoc) 0sv#* &0=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;^}gC}tq  
*/ FY [WdZDZ  
public void sort(int[] data) { 0Ii* "?s  
for(int i=data.length/2;i>2;i/=2){ dyRKmLb  
for(int j=0;j insertSort(data,j,i); 9pKN^FX,76  
} fQ5V RpWGn  
} C:/O]slH  
insertSort(data,0,1); ca@0?q#  
} 9Xt5{\PJ  
/R&!92I0*  
/** _uuxTNN0x*  
* @param data \ %Er%yv)  
* @param j {(@M0?  
* @param i \f6SA{vR|  
*/ %vvA'WG  
private void insertSort(int[] data, int start, int inc) { I @TR|  
int temp; c rPEr  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ~F^(O{EG  
} QAigbSn]  
} wK+%[i&,  
} N/QTf1$  
_ji"##K  
} n*6Oa/JG7  
#1i&!et&/  
快速排序: EELS-qA  
LfEeFF=#n  
package org.rut.util.algorithm.support; 7*8R:X+^r  
"d60IM#N?  
import org.rut.util.algorithm.SortUtil; @U CGsw  
gwDQ@  
/** bI 3o|  
* @author treeroot 5t`< KRz)I  
* @since 2006-2-2 w yP|#Z\  
* @version 1.0 5F{NPKa Q  
*/ TU4"7]/{M  
public class QuickSort implements SortUtil.Sort{ QS:dr."k  
yrOWC  
/* (non-Javadoc) ?!=yp#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :DTKZ9>2D  
*/ ?El8:zt?|  
public void sort(int[] data) { _FXvJ}~m  
quickSort(data,0,data.length-1); ?IR]y-r  
} ,U+y)w]ar  
private void quickSort(int[] data,int i,int j){ @:\Iw"P  
int pivotIndex=(i+j)/2; U|QLc   
file://swap 4.:2!Q  
SortUtil.swap(data,pivotIndex,j); &<}vs`W  
F+mn d,3  
int k=partition(data,i-1,j,data[j]); hI.@!$~=  
SortUtil.swap(data,k,j); +;uP) "Q/L  
if((k-i)>1) quickSort(data,i,k-1); e^)+bmh  
if((j-k)>1) quickSort(data,k+1,j); 1zwk0={x-%  
q}[g/%  
} k%|7H,7  
/** *Y"Kbn 6  
* @param data dWbSrl  
* @param i XKD0n^L[  
* @param j h.PVRAwk  
* @return 36mp+}R#  
*/ We&~]-b AW  
private int partition(int[] data, int l, int r,int pivot) { (jbHV.]P9  
do{ oc+TsVt  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); h>AK^fX  
SortUtil.swap(data,l,r); F?#^wm5TZ  
} 6-8,qk  
while(l SortUtil.swap(data,l,r); p4QQ5O$;  
return l; qdkhfm2(K  
} |[apLQ6  
h"Qp e'D}  
} eT33&:n4  
)Qe<XJH!  
改进后的快速排序: [=k$Q (.3  
f]Jn\7j4  
package org.rut.util.algorithm.support; H9}z0VI  
G`H4#@]  
import org.rut.util.algorithm.SortUtil; ] TY$  
_L }k.  
/** to-DXT.  
* @author treeroot `@%hz%8Y  
* @since 2006-2-2 "Sm'TZx  
* @version 1.0 xN lxi  
*/ 8S*3W3HY  
public class ImprovedQuickSort implements SortUtil.Sort { 4&b*|"Iw  
}LK +w+h~  
private static int MAX_STACK_SIZE=4096; g=*'kj7c3  
private static int THRESHOLD=10; ?=zF]J:G1w  
/* (non-Javadoc)  A [W3.$s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c>I(6$  
*/ %d-|C.  
public void sort(int[] data) { D6X0(pU0  
int[] stack=new int[MAX_STACK_SIZE]; Cngi5._Lb  
PkM]jbLe8  
int top=-1; .[mI9dc  
int pivot; ?8AV-rRX  
int pivotIndex,l,r; v@m2c_,  
t&5N{C:  
stack[++top]=0; O5X@'.#rU  
stack[++top]=data.length-1; ?'>pfU  
'cp1I&>  
while(top>0){ :wWPEhK  
int j=stack[top--]; ^j~CYzmt  
int i=stack[top--]; =CBY_  
MZJ@qIg[Y  
pivotIndex=(i+j)/2; okwkMd-yW  
pivot=data[pivotIndex]; i 'bviD  
K qK?w*Qw  
SortUtil.swap(data,pivotIndex,j); @fz0-vT,  
7 ) Q>R  
file://partition >|j8j:S[  
l=i-1; i|N%dl+T=  
r=j; :$k] ;  
do{ K=Q<G:+&V  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Bs?B\k=  
SortUtil.swap(data,l,r); dgbqMu"  
} -hy`Np  
while(l SortUtil.swap(data,l,r); %=w@c  
SortUtil.swap(data,l,j); Hs9; &C  
'xK ,|U  
if((l-i)>THRESHOLD){ 7-#R[8S  
stack[++top]=i; =74yhPAW  
stack[++top]=l-1; V LXU  
} {3)^$F=T  
if((j-l)>THRESHOLD){ !H)Cua)  
stack[++top]=l+1; ;@5N  
stack[++top]=j; h7?uM^p  
} p.%lE! v  
U5[,UrC  
} %Z.!T  
file://new InsertSort().sort(data); z4!Y9  
insertSort(data); FaA'%P@  
} n]nb+_-97  
/** ,F;<Y9]  
* @param data Fu%D2%V$/  
*/ i!yu%>:M  
private void insertSort(int[] data) { }Bk>'  
int temp; @#u'z ~a)  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); :`Sd5b>  
} 6'Sq|@VOi  
}  []L yu  
} QmiS/`AAv  
1uwzo9Yg  
} QV%,s!_b  
}c]u'a!4  
归并排序: pnTuYT^%)  
vx7wW<e%D  
package org.rut.util.algorithm.support; "a T "o  
tKP zM  
import org.rut.util.algorithm.SortUtil; "|,;~k1  
,$oz1,Q/  
/** 6}/m~m  
* @author treeroot w]ihGh  
* @since 2006-2-2 )@\Eibt2oH  
* @version 1.0 7 'B9z/  
*/ W)LtnD2 w  
public class MergeSort implements SortUtil.Sort{ bVgmjt2&>  
QKP@+E_U  
/* (non-Javadoc) &YpWfY&V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *B*dWMh  
*/ -|cB7 P  
public void sort(int[] data) { c{(4s6D  
int[] temp=new int[data.length]; B k yW  
mergeSort(data,temp,0,data.length-1); [&MhAzF  
} TGuvyY  
<jz\U7TBf  
private void mergeSort(int[] data,int[] temp,int l,int r){ be+]kp  
int mid=(l+r)/2; 1RU+d.&D  
if(l==r) return ; znq/ %7  
mergeSort(data,temp,l,mid); -]Mbe2;  
mergeSort(data,temp,mid+1,r); H_&z- g`  
for(int i=l;i<=r;i++){ JI7.:k;  
temp=data; A< *G;  
} w~|z0;hC  
int i1=l; *.P3fVlZ  
int i2=mid+1; (X|`|Y  
for(int cur=l;cur<=r;cur++){ S(NUuu}S  
if(i1==mid+1) VT:m!<^  
data[cur]=temp[i2++]; b&g`AnYT  
else if(i2>r) kN8?.V%Utw  
data[cur]=temp[i1++]; x7!YA>  
else if(temp[i1] data[cur]=temp[i1++]; m&I5~kD  
else q% pjY  
data[cur]=temp[i2++]; /4{.J=R}  
} -;s-*$I  
} ^2<nn op  
R![)B97^  
} {)y8Y9G  
F#>^S9Gml  
改进后的归并排序: {!av3Pz\  
JANP_b:t  
package org.rut.util.algorithm.support; XJ*W7HD  
:yS Q[AJ"  
import org.rut.util.algorithm.SortUtil; F7N4qq1  
-guVl 4 V  
/**  Z5[f  
* @author treeroot %:=Jr#a  
* @since 2006-2-2 S!{Kn ;@  
* @version 1.0 tLc~]G*\`s  
*/ jHx)q|2\  
public class ImprovedMergeSort implements SortUtil.Sort { ?S0gazZm  
y^tp^  
private static final int THRESHOLD = 10; \?K>~{)  
5Vu@gRk_  
/* \!Fx,#r$7-  
* (non-Javadoc) u EE#A0  
* >XomjU[srQ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V+MhS3VD  
*/ 1}DUe. a  
public void sort(int[] data) { >G<.^~o  
int[] temp=new int[data.length]; j87IxB?o  
mergeSort(data,temp,0,data.length-1); 1v"r8=Wt  
} \*x=q20  
uJ_"gPO  
private void mergeSort(int[] data, int[] temp, int l, int r) { @;T?R  
int i, j, k; 1Zi(5S)  
int mid = (l + r) / 2; (Gp|K6  
if (l == r) 6( ~DS9  
return; >^V3Z{;  
if ((mid - l) >= THRESHOLD) +f]\>{o4  
mergeSort(data, temp, l, mid); 7nOn^f D  
else AOVoOd+6  
insertSort(data, l, mid - l + 1); ]>'yt #]  
if ((r - mid) > THRESHOLD) 3!<} -sW4  
mergeSort(data, temp, mid + 1, r); <Q%:c4N  
else ?[~)D}] j  
insertSort(data, mid + 1, r - mid); x}*Y =Xh  
vo3[)BDbT  
for (i = l; i <= mid; i++) { -7\6j#;l  
temp = data; ;DN:AgXP  
} OK1f Y`$z  
for (j = 1; j <= r - mid; j++) { n?z^"vv$i  
temp[r - j + 1] = data[j + mid]; AfOq?V  
} u*C"d1v=  
int a = temp[l]; C~([aH@-I  
int b = temp[r]; ab-MEN`5  
for (i = l, j = r, k = l; k <= r; k++) { sXmo.{Ayb  
if (a < b) { y |0I3n]e  
data[k] = temp[i++]; /@~&zx&_  
a = temp; y+D"LeCAad  
} else { 3V2w1CERE  
data[k] = temp[j--]; j"Vb8}  
b = temp[j]; 9CW8l0  
} YTo^Q&  
} ; rJ  
} 9X[}ik0  
y+ ZCuX  
/** q=|0lZ$`V_  
* @param data R404\XGL  
* @param l sxBRg=  
* @param i Hz] p]  
*/ DJ#z0)3<p  
private void insertSort(int[] data, int start, int len) { {Vj25Gt  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DZ9qIc}Y  
} TV&4m5  
} {aRZBIv  
} O&c~7tM%  
} $xsmF?Dsx5  
QW_QizR>|  
堆排序: *E-VS= #  
$}/Q%r  
package org.rut.util.algorithm.support; g :Z, ab4  
]p.eFYDh7  
import org.rut.util.algorithm.SortUtil; T1}9^3T?{  
YvP u%=eF  
/** [ queXDn"m  
* @author treeroot wcI4Y0+J  
* @since 2006-2-2 WP-'gC6K=  
* @version 1.0 .Iret :  
*/ !agtgS$qII  
public class HeapSort implements SortUtil.Sort{ /\B[lRn  
gUq)M  
/* (non-Javadoc) {=Ku9\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x# &ZGFr~  
*/ At#'q>Dn  
public void sort(int[] data) { V^^nJs tV  
MaxHeap h=new MaxHeap(); `Wf)qMb  
h.init(data); Nu%JI6&R  
for(int i=0;i h.remove(); [@_zsz,`L  
System.arraycopy(h.queue,1,data,0,data.length); RL;>1Q,H  
} 9u\&kQxqD  
D|Tv`47ntu  
private static class MaxHeap{ `Y`QxU!d%  
pdrF/U+  
void init(int[] data){ L'JEkji"  
this.queue=new int[data.length+1]; 7v~\c%1V  
for(int i=0;i queue[++size]=data; F ;m1I+;  
fixUp(size); Jc#()4  
} %Jr6pmc  
} = +uUWJ&1G  
VK)K#!O8  
private int size=0; 5_mb+A n,  
1Jx|0YmO  
private int[] queue; Kb#}f/  
3GSoHsNk  
public int get() { Ye8&cZ*.  
return queue[1]; sDH|k@K  
} ')ErXLP_  
w]{NaNIeq1  
public void remove() { }0({c~z\  
SortUtil.swap(queue,1,size--); ]bq<vI%  
fixDown(1); 8'2lc  
} PG1#Z?_  
file://fixdown s)e; c<(/  
private void fixDown(int k) { p5KM(N6f  
int j; f]BG`rJX  
while ((j = k << 1) <= size) { E&/D%}Wl  
if (j < size %26amp;%26amp; queue[j] j++; "5-S:+  
if (queue[k]>queue[j]) file://不用交换 hOX$|0i  
break; 1MV\ ^l_  
SortUtil.swap(queue,j,k); $UZ4,S?V  
k = j; 35;)O -  
} BHwQB2t gc  
} cs?@Ri=g  
private void fixUp(int k) { jG3}V3|.  
while (k > 1) { S"iQQV{)Z  
int j = k >> 1; vYD>m~Qc^  
if (queue[j]>queue[k]) t:X[Blw3$  
break; GLe(?\Ug=  
SortUtil.swap(queue,j,k); *mM+(]8US  
k = j; bT@7&  
} V;Zp3Qo!  
} fNi&1J-/  
Hy<4q^3$G  
} ] =jnt  
3:rH1vG.m  
} j/bebR}X  
sBuVm<H  
SortUtil: g#V3u=I8~  
d0b--v/  
package org.rut.util.algorithm; 2O|o%`?  
G6zFCgFJ^y  
import org.rut.util.algorithm.support.BubbleSort; gz[Ng> D+  
import org.rut.util.algorithm.support.HeapSort; V 'Gi2gNaP  
import org.rut.util.algorithm.support.ImprovedMergeSort; @NXGVmY1}  
import org.rut.util.algorithm.support.ImprovedQuickSort; -K`0`n}  
import org.rut.util.algorithm.support.InsertSort; .~ a)  
import org.rut.util.algorithm.support.MergeSort; % 8kbX  
import org.rut.util.algorithm.support.QuickSort; qFV=P k  
import org.rut.util.algorithm.support.SelectionSort; x7J|  
import org.rut.util.algorithm.support.ShellSort; rbnu:+!  
UcMe("U  
/** C"/]X  
* @author treeroot N1I1!!$K;%  
* @since 2006-2-2 G{ rUqo  
* @version 1.0 v&U'%1|  
*/ }Kq5!XJV9C  
public class SortUtil { eb:mp/  
public final static int INSERT = 1; >R?EJ;h  
public final static int BUBBLE = 2; 181-m7W  
public final static int SELECTION = 3; {Gs&u>>R"^  
public final static int SHELL = 4; 4yC{BRbi  
public final static int QUICK = 5; VG'oy  
public final static int IMPROVED_QUICK = 6; Q=yQEh|Y  
public final static int MERGE = 7; Dd*T5A?  
public final static int IMPROVED_MERGE = 8; HPAg1bV:-  
public final static int HEAP = 9; -9{}rE  
y^zVb\"4  
public static void sort(int[] data) { Vzz0)`*hQ  
sort(data, IMPROVED_QUICK); Yuze9b\[  
} g~%=[1  
private static String[] name={ O'm&S?>  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @]d N   
}; +*g[hRw[  
`4Z#/g  
private static Sort[] impl=new Sort[]{ K+H?,I  
new InsertSort(), Z>a_vC  
new BubbleSort(), 0i$jtCCL(  
new SelectionSort(), kT UQ8U  
new ShellSort(), 9U58#  
new QuickSort(), /U)w:B+p/g  
new ImprovedQuickSort(), K4xZT+Qb  
new MergeSort(), %yQ-~T@  
new ImprovedMergeSort(), *ZGQ`#1.X6  
new HeapSort() x}1(okc  
}; )xP]rOT  
ls,gQ]B:P  
public static String toString(int algorithm){ B l'  
return name[algorithm-1]; l~&efAJ-$  
} `R8~H7{I6  
~MO'%'@  
public static void sort(int[] data, int algorithm) { 9XS+W w7  
impl[algorithm-1].sort(data); vsoj] R$C  
} [_qBp:_j?s  
,^|+n()O  
public static interface Sort { e\.|d<N?  
public void sort(int[] data); pZGs o  
} 5cyl:1Ln  
.4F(Y_c  
public static void swap(int[] data, int i, int j) { t2+m7*76  
int temp = data; nI.#A  
data = data[j]; -H.;73Kb[  
data[j] = temp; #>~$`Sg  
} guSgTUJ}  
} NEZF q?  
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