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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。 }'n]C|gZ  
插入排序: o*oFCR]j  
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package org.rut.util.algorithm.support; Y.#fpG'  
tX,x%(  
import org.rut.util.algorithm.SortUtil; y'non0P.  
/** *55unc  
* @author treeroot @3S:W2k  
* @since 2006-2-2 J6<O|ng::  
* @version 1.0 ?0qP6'nWx  
*/ dyohs_  
public class InsertSort implements SortUtil.Sort{ [X>f;;h  
0]^gT'  
/* (non-Javadoc) ofPv?_@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ViG>gMGv  
*/ agQD d8oX  
public void sort(int[] data) { JU)k+:\a  
int temp; 4U u`1gtz  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); S6fbwZZMG  
} wxT( ktE  
} Q{yjIy/b  
} V7cr%tY5  
sk AF6n  
} J93xxj  
w6pXF5ur>  
冒泡排序: (A "yE4rYK  
aK 3'u   
package org.rut.util.algorithm.support; tf[)| /M  
G&"O)$h  
import org.rut.util.algorithm.SortUtil; p./0N.  
pbw{EzM  
/** {<?8Y  
* @author treeroot xn,9Wj-  
* @since 2006-2-2 y*p02\)  
* @version 1.0 H8 xhE~'t  
*/ `PSjk F(  
public class BubbleSort implements SortUtil.Sort{ sz%_9;`dpL  
NFR>[L V  
/* (non-Javadoc) I0!]J{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dP`B9>r  
*/ W!Fc60>p@f  
public void sort(int[] data) { ia_l P  
int temp; i83[':  
for(int i=0;i for(int j=data.length-1;j>i;j--){ FZLx.3k4  
if(data[j] SortUtil.swap(data,j,j-1); HxcL3Bh$~}  
} ),|z4~  
} +_+j"BT  
} mrr~#Bb>  
} P+wpX  
DuIXv7"[  
} p@[ fZj  
AWKJ@&pA9m  
选择排序: ou- uZ"$,c  
J_.cC  
package org.rut.util.algorithm.support; -3guuT3x\  
HrfS^B  
import org.rut.util.algorithm.SortUtil; b6p'%;Y/  
b4WH37,lA  
/** >k/cm3  
* @author treeroot n?;rWq"  
* @since 2006-2-2 s~9n13z  
* @version 1.0 ~E!kx  
*/ /,UnT(/k(  
public class SelectionSort implements SortUtil.Sort { _(I6o  
i];P!Gm  
/* ! Dj2/][  
* (non-Javadoc) #V%98|"  
* :7mHPe }(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }a.j~>rq  
*/ 'tvuw\hhL  
public void sort(int[] data) { :9Jy/7/  
int temp; 0;=- x"  
for (int i = 0; i < data.length; i++) { aWJj@',_  
int lowIndex = i; w,$qsmR  
for (int j = data.length - 1; j > i; j--) { x!\q69ndv  
if (data[j] < data[lowIndex]) { <aDZ{T%  
lowIndex = j; [ ~2imS  
} M +r!63T  
} JXYZ5&[  
SortUtil.swap(data,i,lowIndex); x3Y)l1gh  
} r$}C<a[U  
} \7"|'fz  
_#s,$K#  
} 5<R m{  
vIbM@Y4 '?  
Shell排序: qS FtQ4  
UNff &E-  
package org.rut.util.algorithm.support; n=vDEX:'  
%&| uT  
import org.rut.util.algorithm.SortUtil; X3X_=qzc  
q*3keB;X  
/** Cl]?qH*:  
* @author treeroot mV$ebFco0  
* @since 2006-2-2 E<[ s+iX  
* @version 1.0 xI{4<m/0N  
*/ I}3F'}JV<  
public class ShellSort implements SortUtil.Sort{ vjlN@ "  
<78|~SKAV  
/* (non-Javadoc) D5D *$IC  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _y_}/  
*/ ]A'{DKR  
public void sort(int[] data) { h<`aL;.g  
for(int i=data.length/2;i>2;i/=2){ E,}{iqAb  
for(int j=0;j insertSort(data,j,i); At4\D+J{Vs  
} KBmOi  
} Wye* ~t  
insertSort(data,0,1); 5mD8$% \8  
} ApXf<MAy  
'z(Y9%+a  
/** f +{=##'0  
* @param data gwRB6m$  
* @param j <46&R[17M  
* @param i FklR!*oL,)  
*/ xR/CP.dg  
private void insertSort(int[] data, int start, int inc) { ctZ,qg*N  
int temp; ,,gMUpL7_8  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); iZ-R%-}B  
} .ybmJU*Hg  
} w`)5(~b  
} Mw/9DrE7/  
`$B?TNuch7  
} @MES.g  
&v{#yzM  
快速排序: j Q5F}  
qk2E>  
package org.rut.util.algorithm.support; Lt't   
.B:ZyTI  
import org.rut.util.algorithm.SortUtil; k&ci5MpN  
1;ttwF>G7  
/** ga 5Q  
* @author treeroot 'f\9'v  
* @since 2006-2-2 g"m' C6;  
* @version 1.0 Zv;nY7B  
*/ h;gc5"mG  
public class QuickSort implements SortUtil.Sort{ }=[p>3Dd  
_;j1g%  
/* (non-Javadoc) 8tx*z"2S  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *[Z`0AgP  
*/ >GGM76vB=,  
public void sort(int[] data) { !p&<.H_  
quickSort(data,0,data.length-1); `Nx@MPo  
} Z7a@$n3h  
private void quickSort(int[] data,int i,int j){ yE8D^M|g  
int pivotIndex=(i+j)/2; !kovrvM6F  
file://swap .xJ54Vz  
SortUtil.swap(data,pivotIndex,j); K%v:giN$l`  
]<;7ZNG"Y5  
int k=partition(data,i-1,j,data[j]); 4X+xh|R:U  
SortUtil.swap(data,k,j); #n>U7j9`O  
if((k-i)>1) quickSort(data,i,k-1); FEjO}lTK  
if((j-k)>1) quickSort(data,k+1,j); ?+t;\  
ys9:";X;}  
} >dl5^  
/** 4YfM.~ 6  
* @param data 7;EDU  
* @param i >3!~U.AA'x  
* @param j u#76w74  
* @return B$ eM  
*/ ):$KM{X  
private int partition(int[] data, int l, int r,int pivot) { 2{79,Js0  
do{ lVvcrU  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); s2O()u-  
SortUtil.swap(data,l,r); "iSY;y o  
} zZCl]cql  
while(l SortUtil.swap(data,l,r); >+M[!;m}  
return l; 8^UF0>`'  
} jY=y<R_oK  
<_Yd N)x  
} n _K1%  
/~NX<Ye&  
改进后的快速排序: ZNBowZI  
JwSF}kNs}  
package org.rut.util.algorithm.support; ^*ZaqMA  
<:9 ts@B  
import org.rut.util.algorithm.SortUtil; /e2zH  
eFiG:LS7  
/** XoKgs,y4  
* @author treeroot rfwJLl/  
* @since 2006-2-2 *Jsb~wta  
* @version 1.0 ;fNCbyg4 I  
*/  0s;~9>  
public class ImprovedQuickSort implements SortUtil.Sort { clvg5{^q[  
JvAXLT  
private static int MAX_STACK_SIZE=4096; k4q":}M  
private static int THRESHOLD=10; BN9e S   
/* (non-Javadoc) 2.^{4 1:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DT]4C!dh  
*/ hz:7W8  
public void sort(int[] data) { g{N}]_%Uh  
int[] stack=new int[MAX_STACK_SIZE]; nah?V" ?Y  
x#0?$}f<  
int top=-1; D6VdgU|  
int pivot; 9lq5\ tL-  
int pivotIndex,l,r; {!2K-7;  
);!ND %  
stack[++top]=0; HYdM1s6vo  
stack[++top]=data.length-1; {"]!zL  
?'k_K:_  
while(top>0){ EXSJ@k6=8s  
int j=stack[top--]; 'l'3&.{Yfk  
int i=stack[top--]; cSPQ NYU:  
if&bp ,  
pivotIndex=(i+j)/2; ?M:>2wl  
pivot=data[pivotIndex]; B{/og*xd*1  
`4K|L6  
SortUtil.swap(data,pivotIndex,j); gKb,Vrt  
\c\~k0u  
file://partition T";evM66  
l=i-1; *O[/KR%  
r=j; Ck/44Wfej  
do{ 3jZGO9ttnS  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); WWp MuB_G  
SortUtil.swap(data,l,r); 1hw.gn*JK>  
} 4. R(`#f  
while(l SortUtil.swap(data,l,r); 4M&$wi  
SortUtil.swap(data,l,j); 9n(68|^$  
0d+n[Go+S  
if((l-i)>THRESHOLD){ (xo`*Q,+  
stack[++top]=i; 3(oMASf  
stack[++top]=l-1; 4$iS@o|  
} M0$MK>  
if((j-l)>THRESHOLD){ Pm%xX~H  
stack[++top]=l+1; O7 ;=g!j  
stack[++top]=j; B.y}S  
} (G F}c\=T7  
kl]V_ 7[  
} 4FzTf7h^  
file://new InsertSort().sort(data); YC1Bgz  
insertSort(data); dU3A:uS^  
} kTH"" h{  
/** S${%T$>  
* @param data Md4Q.8  
*/ [~8U],?1  
private void insertSort(int[] data) { ZbC$Fk,,I&  
int temp; *+*W# de.  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); kSV(T'#x  
} AZ(zM.y!#_  
} 8=$XhC  
} |m KohV qr  
ZV--d'YiEm  
} 3: GwX4yW  
C<=rnIf'  
归并排序: U@q5`4-!8  
MH#Tp#RG  
package org.rut.util.algorithm.support; curYD~7  
Ja~8ZrcY  
import org.rut.util.algorithm.SortUtil; xS UpVK  
ogIu\kiZ  
/** EmaS/]X[  
* @author treeroot -r,v3n  
* @since 2006-2-2 [s$x"Ex  
* @version 1.0 .#~!w!T  
*/ B>1,I'/$.  
public class MergeSort implements SortUtil.Sort{ &wlD`0v  
{d<XDx4`  
/* (non-Javadoc) ^.:&ZsqV  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8Ygf@*9L4  
*/ 8KJ`+"<=@  
public void sort(int[] data) { F m:Ys](  
int[] temp=new int[data.length]; v)np.j0V7  
mergeSort(data,temp,0,data.length-1); j5DCc,s  
} \ n 2MP  
7HVENj_b+M  
private void mergeSort(int[] data,int[] temp,int l,int r){ 4!Radl3`  
int mid=(l+r)/2; Zj -#"Gm  
if(l==r) return ; s<LnUF1b  
mergeSort(data,temp,l,mid); i#4+l$q  
mergeSort(data,temp,mid+1,r); 5wW5 n5YS  
for(int i=l;i<=r;i++){  K!ILO  
temp=data; U\Y0v.11  
} XY{N"S8  
int i1=l;  omg#[  
int i2=mid+1; !U:&8Le  
for(int cur=l;cur<=r;cur++){ E} ]=<8V  
if(i1==mid+1) V'#R1x"3  
data[cur]=temp[i2++]; EUs9BJFP  
else if(i2>r) 7[P-;8)tq  
data[cur]=temp[i1++]; J:"@S%gy%  
else if(temp[i1] data[cur]=temp[i1++]; Mi#i 3y(  
else cY5;~lO  
data[cur]=temp[i2++]; 9QX!HQ|5y8  
} aV7VbC  
} S'^ q  
dhA~Yu  
} s<"|'~<n  
ECi;o1hda  
改进后的归并排序: K" VcPDK  
L7{}`O/g7  
package org.rut.util.algorithm.support; '*L6@e#U  
d)V8FX,t  
import org.rut.util.algorithm.SortUtil; OQfFS+6  
t O.5  
/** ,x1OQ jtY  
* @author treeroot ,ja!OZ0$  
* @since 2006-2-2 0ZwXuq  
* @version 1.0 ;8XRs?xyd  
*/ , d $"`W2  
public class ImprovedMergeSort implements SortUtil.Sort { *]HnFP  
Lhp&RGy  
private static final int THRESHOLD = 10; #S9J9k  
wdP(MkaV  
/* ^CLQs;zXE  
* (non-Javadoc) &kzysv-_  
* XxMZU(5  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B VeMV4  
*/ NW5OLa")J<  
public void sort(int[] data) { L$3lsu!4n  
int[] temp=new int[data.length]; d2Q*1Q@u  
mergeSort(data,temp,0,data.length-1); FHU6o910  
} 9h6Oq(0b8  
cQhr{W,Un  
private void mergeSort(int[] data, int[] temp, int l, int r) { k*)sz  
int i, j, k; HdxP:s.T  
int mid = (l + r) / 2; 8O]`3oa>  
if (l == r) ?[Y(JO#  
return; \Aro Sy9  
if ((mid - l) >= THRESHOLD) ko[w#j  
mergeSort(data, temp, l, mid); E>]K#H  
else sq`Xz 8u  
insertSort(data, l, mid - l + 1); p" >*WQ   
if ((r - mid) > THRESHOLD) V>T?'GbS  
mergeSort(data, temp, mid + 1, r); o5a=>|?p>  
else an"~n`g  
insertSort(data, mid + 1, r - mid); .+u b\  
%\<b{x# G  
for (i = l; i <= mid; i++) { h97#(_wV>  
temp = data; \wA:58 -j  
} *p $0(bz  
for (j = 1; j <= r - mid; j++) { A_9^S!  
temp[r - j + 1] = data[j + mid]; t([}a ~1}  
} &;-zy%#l  
int a = temp[l]; d)vP9vXy  
int b = temp[r]; \PE;R.v_:  
for (i = l, j = r, k = l; k <= r; k++) { ZEI,9`t!  
if (a < b) { * HKu%g  
data[k] = temp[i++]; ~)ys,Q  
a = temp; HGGq;Nbm  
} else { ;`#R9\C=h  
data[k] = temp[j--]; 4`#Q  
b = temp[j]; l@B9}Icq  
} 3>1^$0iq  
} v,ssv{gU  
} xW`y7Q}p  
]Orx %8QS!  
/** d>hv-n D  
* @param data (*$bTI/~  
* @param l n6% `  
* @param i uAPVR  
*/ :82h GU  
private void insertSort(int[] data, int start, int len) { 2 DW @}[G  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v3-' G gM  
} E7A!,A&>  
} m]2xOR_  
} {=[>N>"  
} e NIzI]~  
]X>yZec  
堆排序: tON>wmN  
sFFQ]ST2p  
package org.rut.util.algorithm.support; |EE1S{!24m  
+%W8Juu  
import org.rut.util.algorithm.SortUtil; 5X!-Hj  
kMQ /9~  
/** yc](  
* @author treeroot C.jWT1  
* @since 2006-2-2 f,HUr% @  
* @version 1.0 sApix=Lr  
*/ , Z"<-%3  
public class HeapSort implements SortUtil.Sort{ C27:ty V  
{]^Ixm-,f  
/* (non-Javadoc) ?mg@zq8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0\%g@j-aD  
*/ &-ro pY  
public void sort(int[] data) { -@#w)  
MaxHeap h=new MaxHeap();  `t U  
h.init(data); SB\%"nnV  
for(int i=0;i h.remove(); jn2=)KBa_  
System.arraycopy(h.queue,1,data,0,data.length); jfuHZ^YA  
} KG'i#(u[  
Py)ZHML  
private static class MaxHeap{ F[jE#M=k  
"bo0O7InOV  
void init(int[] data){ `$T$483/  
this.queue=new int[data.length+1]; 7N9NeSH  
for(int i=0;i queue[++size]=data; sAkr-x?+M  
fixUp(size); J$3g3%t  
} @ma(py  
} \Rny*px  
9"P|Csj  
private int size=0; bx3Q$|M?  
<gp?}Lk  
private int[] queue; YQ+hQ:4-  
Wgwd?@uK  
public int get() { _VrY7Mz:r  
return queue[1]; l[}4 X/  
} &3Zq1o  
+<7Oj s>o  
public void remove() { 4_R|3L  
SortUtil.swap(queue,1,size--); [qYr~:`-[  
fixDown(1); i>F=XE  
} ^|Q]WHNFB  
file://fixdown hS]w A"\87  
private void fixDown(int k) { 8%[pno |0I  
int j; I~GF%$-G  
while ((j = k << 1) <= size) { A]z*#+Sl  
if (j < size %26amp;%26amp; queue[j] j++; :?t~|7O:  
if (queue[k]>queue[j]) file://不用交换  ?%,NOX  
break; v 4ot08 C  
SortUtil.swap(queue,j,k); fj_23{,/"g  
k = j; f O*jCl  
} N^Re  
} P49\A^5S!  
private void fixUp(int k) { (`tRJWbdz  
while (k > 1) { c3vb~l)  
int j = k >> 1; AJPvwu}D  
if (queue[j]>queue[k]) .G0 N+)  
break; 7;'33Bm*  
SortUtil.swap(queue,j,k); ]{>AU^=U  
k = j; Rr )+M3'  
} [,zq  
} =*mT{q@  
.Mt3e c<  
} 8t-GsjHb  
=CX1jrLZ  
} tdy2ZPVtTV  
G95,J/w  
SortUtil: LFp "Waiv  
 T{YZ`[  
package org.rut.util.algorithm; .Eao|;  
d$dy6{/YD  
import org.rut.util.algorithm.support.BubbleSort; %`Re {%1;  
import org.rut.util.algorithm.support.HeapSort; !IxO''4  
import org.rut.util.algorithm.support.ImprovedMergeSort; )9QtnM  
import org.rut.util.algorithm.support.ImprovedQuickSort; "t@p9>  
import org.rut.util.algorithm.support.InsertSort; "}4%vZz  
import org.rut.util.algorithm.support.MergeSort; ]MbPivM  
import org.rut.util.algorithm.support.QuickSort; E~'mxx~i  
import org.rut.util.algorithm.support.SelectionSort; qWt}8_"  
import org.rut.util.algorithm.support.ShellSort; 2-&EkF4p'  
_7 3q,3`24  
/** f:T?oR>2  
* @author treeroot  4M'>oa  
* @since 2006-2-2 0YeTS!*Aj  
* @version 1.0 i!wU8 @  
*/ JKfG/z|  
public class SortUtil { P]E-Wp'p  
public final static int INSERT = 1; jmok]-pC  
public final static int BUBBLE = 2; Jd2.j?P=  
public final static int SELECTION = 3; ~Bd=]a$mj  
public final static int SHELL = 4; wT1s;2%  
public final static int QUICK = 5; /?\3%<vn  
public final static int IMPROVED_QUICK = 6; (~T*yH ~  
public final static int MERGE = 7; e|~MJu+1  
public final static int IMPROVED_MERGE = 8; 0c_xPBbB+  
public final static int HEAP = 9; pl[J!d.c  
B@,9Cx564  
public static void sort(int[] data) { p6VD*PT$&  
sort(data, IMPROVED_QUICK); Dn- gP  
} 6Rd4waj_,U  
private static String[] name={ ~6vz2DuB=  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >yIJ8IDF  
}; xo:kT)  
hy;VvAH 5  
private static Sort[] impl=new Sort[]{ !<bwg  
new InsertSort(), !_S>ER  
new BubbleSort(), V5|ANt  
new SelectionSort(), [U\?+@E*  
new ShellSort(), |s|}u`(@9  
new QuickSort(), XQ}Zr/f6  
new ImprovedQuickSort(), Fsx?(?tCMo  
new MergeSort(), 4 1_gak;  
new ImprovedMergeSort(), *O?c~UJhhV  
new HeapSort() _n&Nw7d2 M  
}; ngY%T5-  
n,la<N]  
public static String toString(int algorithm){ {Gxe%gu6K  
return name[algorithm-1]; 7  ,Rg~L  
} :Pud%}'  
xad`-vw  
public static void sort(int[] data, int algorithm) { WJ7|0qb  
impl[algorithm-1].sort(data); 74s{b]jN'-  
} [ oWkd_dK  
Bqx5N"  
public static interface Sort { 8h )XULs2  
public void sort(int[] data); 2*Z2uV^  
}  8*ZsR)!  
rIb+c=|F  
public static void swap(int[] data, int i, int j) { ,d G.67  
int temp = data; ``o]i{x  
data = data[j]; Z`Yt~{,Q  
data[j] = temp; b@:OlZ~ %  
} c]=2>ov)hR  
} ">A<%5F2  
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