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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。 {7swE(N  
插入排序: c-1,((p  
j=b?WNK  
package org.rut.util.algorithm.support; 8AL`<8$  
/vC|_G|{  
import org.rut.util.algorithm.SortUtil; =y+gS%o$  
/** sI\v}$(~  
* @author treeroot OZ>w.$ue  
* @since 2006-2-2 _wMxKM  
* @version 1.0 hZ@frbuowk  
*/ zA/ tHlKc  
public class InsertSort implements SortUtil.Sort{ &z kuL  
%gUf  
/* (non-Javadoc) HZ%2WM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -Uj)6PzGu  
*/ %L(;}sJ.  
public void sort(int[] data) { SR)jJ=R3  
int temp; mQ(6ahD U  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ZNWo:N8;  
} z OwKh>]  
} +I~`Ob  
} LF6PKS  
]mIcK  
} %-9?rOr  
/bm2v;  
冒泡排序: \tR](, /  
s4V-brCM$|  
package org.rut.util.algorithm.support; yC#%fgQ r  
T($d3Nn1  
import org.rut.util.algorithm.SortUtil; >Sc)?[H  
Vx'82CIC  
/** :\hcl&W:  
* @author treeroot j'L/eps?S  
* @since 2006-2-2 ]k+XL*]'A  
* @version 1.0 S+wy^x@@  
*/ YkWv*l  
public class BubbleSort implements SortUtil.Sort{ arVu`pD*n  
ki|KtKAu_9  
/* (non-Javadoc) LAs#g||M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @6["A'h  
*/ 4)Jtc2z7Z\  
public void sort(int[] data) { c_V^~hq  
int temp; v@,n]"  
for(int i=0;i for(int j=data.length-1;j>i;j--){ H){}28dX  
if(data[j] SortUtil.swap(data,j,j-1); sr S2v\1:  
} rF@njw@  
} b"4'*<=au  
} VrQgn9L  
} h D5NX  
+"mS<  
} 5:R$xgc  
Zc!rL0T  
选择排序: DsJ ikg(J  
qb$&BZj]|  
package org.rut.util.algorithm.support; T'^ Do/  
) |t;nK,  
import org.rut.util.algorithm.SortUtil; ]u5B]ZQnA  
1`sLbPW  
/** ztS:1\  
* @author treeroot IL0e:-@!0  
* @since 2006-2-2 pseN!7+or  
* @version 1.0 Fal##6B  
*/ EKgY  
public class SelectionSort implements SortUtil.Sort { lIhP\:;S&  
g49G7sk  
/* I3I1<}>]Z  
* (non-Javadoc) W( 4Mvd  
* y -6{>P/  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %3%bRP  
*/ o:wI{?%-3  
public void sort(int[] data) { [,bra8f[C  
int temp; 9ZJn 8ki  
for (int i = 0; i < data.length; i++) { N4HIQ\p  
int lowIndex = i; 6y+_x'  
for (int j = data.length - 1; j > i; j--) { kJ'rtz4QO  
if (data[j] < data[lowIndex]) { :QoW*Gs1  
lowIndex = j; 0#G@F5; <  
} \k4em{K  
} .#q]{j@Ot  
SortUtil.swap(data,i,lowIndex); ~:JoKm`vU  
} ?<;9=l\Q  
} !{1;wC(b  
olv0w ;s  
} d6+$[4w  
2RbK##`vC  
Shell排序: WrHY'  
AAXlBY6Y-  
package org.rut.util.algorithm.support; fzdWM:g  
eIDrN%3  
import org.rut.util.algorithm.SortUtil; 11^.oa+`  
H*H~~yQ  
/** u~xfI[8C  
* @author treeroot ;!hwcOkX  
* @since 2006-2-2 ]qd$rX   
* @version 1.0 c 8t  
*/ !kxJ&VmeF  
public class ShellSort implements SortUtil.Sort{ P @Jo[J<  
%O|+` "  
/* (non-Javadoc) 0SV<Pl^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eF"k"Ckt'  
*/ Yi?v |H<a  
public void sort(int[] data) { 5i@WBa  
for(int i=data.length/2;i>2;i/=2){ 9,?7mgZ p  
for(int j=0;j insertSort(data,j,i); un F=";9H  
} bu8AOtY9E-  
} Z35(f0b  
insertSort(data,0,1); yE#.Q<4  
} EJW}&e/  
4{QD: D(D  
/** >Jk]=_%  
* @param data ^O3i)GO  
* @param j p:NIRs  
* @param i GY t|[GC  
*/ )61X,z  
private void insertSort(int[] data, int start, int inc) { / q| o  
int temp; *B)J(^M!q  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); $'x#rW>v  
} L,O.XR  
} %<O0Yenu  
} JKz]fgOd$  
X \BxRgl},  
} O?`_RN4l  
6b1AIs8  
快速排序: b OolBKV  
:V0sKg|sS  
package org.rut.util.algorithm.support; ES)@iM?5  
]7{ e~U  
import org.rut.util.algorithm.SortUtil; bo-L|R&O  
n_{az{~  
/**  y 2C Jk~  
* @author treeroot K=Z.<f  
* @since 2006-2-2 t2(vtxrt  
* @version 1.0 nN2huNTf:  
*/ {O6yJckH  
public class QuickSort implements SortUtil.Sort{ 'Rb tcFb   
QuIZpP=  
/* (non-Javadoc) hb<cynY  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r+!29  
*/ gtnu/ Q  
public void sort(int[] data) { (DkfLadB  
quickSort(data,0,data.length-1); hkB|rhJgm  
} `^HK-t4q  
private void quickSort(int[] data,int i,int j){ ]1 jhy2j  
int pivotIndex=(i+j)/2; \4KV9wm  
file://swap aH_0EBRc  
SortUtil.swap(data,pivotIndex,j); +i~kqiy.  
T0{X,  
int k=partition(data,i-1,j,data[j]); aH dQi,=z  
SortUtil.swap(data,k,j); h0?w V5H  
if((k-i)>1) quickSort(data,i,k-1); j}O7fLRu  
if((j-k)>1) quickSort(data,k+1,j); Gl%N}8Cim  
twox.@"U  
} f@ILC=c<  
/** ,u=+%6b)A  
* @param data zHKx,]9b  
* @param i UyAy?i8K  
* @param j }tO>&$ Z6f  
* @return )x<BeD  
*/ P  Ij  
private int partition(int[] data, int l, int r,int pivot) { :Y|[?;  
do{ Am|)\/K+Z  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); <1#hX(Q  
SortUtil.swap(data,l,r); 81H9d6hqcD  
} S%j W} v';  
while(l SortUtil.swap(data,l,r); X"sJiFS  
return l; H*P[tyz$  
} {DapXx  
q8!]x-5$6j  
} `pjB^--w  
p<<dj%  
改进后的快速排序: 0YC|;`J  
6rWb2b  
package org.rut.util.algorithm.support; X/_89<&  
&xpvHKJl  
import org.rut.util.algorithm.SortUtil; ,n2"N5{jw  
"A> _U<Y  
/** \ B'AXv 6  
* @author treeroot G +&pq  
* @since 2006-2-2 e$Mvl=NYp\  
* @version 1.0  \EXa 9X2  
*/ ~)VI` 36X  
public class ImprovedQuickSort implements SortUtil.Sort { u@;e`-@  
z+{xW7  
private static int MAX_STACK_SIZE=4096; F'-XAI <3  
private static int THRESHOLD=10; +sV~#%%  
/* (non-Javadoc) /I((A /ks  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f40OVT@g  
*/ 9o4h~Imu  
public void sort(int[] data) { "}Ikx tee  
int[] stack=new int[MAX_STACK_SIZE]; %OsxXO?  
6a<zZO`Z6+  
int top=-1; 6Jq3l_  
int pivot; I1#MS4;$^  
int pivotIndex,l,r; 6 FN#Xg  
p1\mjM  
stack[++top]=0; A+j!VM   
stack[++top]=data.length-1; B>4/[ YHr;  
o7 0] F  
while(top>0){ * F_KOf9p  
int j=stack[top--]; "jLC!h^N  
int i=stack[top--]; da i+"  
yzMGZi`ut  
pivotIndex=(i+j)/2; @j"6f|d  
pivot=data[pivotIndex]; `(ik2#B`}  
T2n3g|4  
SortUtil.swap(data,pivotIndex,j); S>)[n]f  
%WC ^aKfY  
file://partition #hP>IU  
l=i-1; &F:.OVzX  
r=j; ! ,0  
do{ K&,";9c  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); tLxeq?Oo]  
SortUtil.swap(data,l,r); Wffz&pR8  
} &E1m{gB(  
while(l SortUtil.swap(data,l,r); Y;'SD{On  
SortUtil.swap(data,l,j); $}'(%\7"  
Zu<S<??Jf  
if((l-i)>THRESHOLD){ -w>ss&  
stack[++top]=i; d"n"A?nXh  
stack[++top]=l-1; (tX)r4VU  
} 0yvp>{;p  
if((j-l)>THRESHOLD){ :wN !E{0j  
stack[++top]=l+1; 1Vx5tOq  
stack[++top]=j; D1 $ER>  
} ~L>86/hP,N  
0m=57c$O  
} n @,.  
file://new InsertSort().sort(data); CxN xb)c &  
insertSort(data); 3Fxr=  
} hsT&c|  
/** }dHdy{$  
* @param data MTN*{ug2:  
*/ N!MDD?0  
private void insertSort(int[] data) { 1/~=61msc  
int temp; L`e19I$  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); :5.F  
} V#5$J Xp  
} ky-nP8L}  
} 9e c},~(  
=R~zD4{"  
} 2gZ nrU  
Mi{ns $B%  
归并排序: #0hqfs  
znPh7{|<  
package org.rut.util.algorithm.support; 0~K&P#iR  
[3I|MZ  
import org.rut.util.algorithm.SortUtil; JT!9LNh;R`  
.c:h!-D;  
/** ( Zd(?">i  
* @author treeroot FUlhEH  
* @since 2006-2-2 Ibu9A wPm  
* @version 1.0 R&BWCC{  
*/ d =n{Wn{C  
public class MergeSort implements SortUtil.Sort{ b$%Kv(  
E4>}O;m0  
/* (non-Javadoc) qv}ECQ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7 7y+ik  
*/ N_S~&(I|  
public void sort(int[] data) { w^ OB  
int[] temp=new int[data.length]; ~#jiX6<I  
mergeSort(data,temp,0,data.length-1); 7Xu#|k  
} xb<|m2<)H  
1DhC,)+D}q  
private void mergeSort(int[] data,int[] temp,int l,int r){ d6 ef)mw  
int mid=(l+r)/2; vV*J;%MO  
if(l==r) return ; fU?#^Lg  
mergeSort(data,temp,l,mid); lgS7;  
mergeSort(data,temp,mid+1,r); 1YJ?Y  
for(int i=l;i<=r;i++){ biU_ImJ>0  
temp=data; |Tc4a4jS  
} gBi3^GxjM?  
int i1=l; 9Li*L&B)  
int i2=mid+1; =>B"j`oR  
for(int cur=l;cur<=r;cur++){ @fJsRWvGq  
if(i1==mid+1) R ZQH#+*t}  
data[cur]=temp[i2++]; 80_w_i+  
else if(i2>r) j6Sg~nRh  
data[cur]=temp[i1++]; <+-n lK4  
else if(temp[i1] data[cur]=temp[i1++]; 5lJL[{  
else ^/#G,MxNy  
data[cur]=temp[i2++]; -{k8^o7$  
} N0Y4m_dm*  
} y.J>}[\&x  
kY'Wf`y(  
} L!zdrCM  
vdAd@Z~\  
改进后的归并排序: Z\EA!Cs3  
8cG`We8l&  
package org.rut.util.algorithm.support; q(:L8nKT]  
+(92}~RK  
import org.rut.util.algorithm.SortUtil; A8{ xZsH  
LUId<We  
/** [}ja \!P  
* @author treeroot  +:-xV  
* @since 2006-2-2 )J> dGIb  
* @version 1.0 1=C12  
*/ 2/fol TR7  
public class ImprovedMergeSort implements SortUtil.Sort { U|xHy+N  
h !K" ;qw  
private static final int THRESHOLD = 10; n#b{  
5;HGS{`  
/* |[Fb&x  
* (non-Javadoc) hN6wp_  
* Vjv6d&Q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `Ucj_6&Tqs  
*/ D@gC(&U/6  
public void sort(int[] data) { *2->>"kh  
int[] temp=new int[data.length]; * 7Ov.v%  
mergeSort(data,temp,0,data.length-1); &C+2p  
} XLCqB|8`V  
CYgokS\=,  
private void mergeSort(int[] data, int[] temp, int l, int r) { >Ti%Th,  
int i, j, k; J ( d[05x0  
int mid = (l + r) / 2; Ih|4ISI  
if (l == r) [)s4:V  
return; 5rB>)p05[  
if ((mid - l) >= THRESHOLD) k}H7bZug  
mergeSort(data, temp, l, mid); T?m@`"L,  
else n19A>,m  
insertSort(data, l, mid - l + 1); U\H[.qY-  
if ((r - mid) > THRESHOLD) ].kj-,5>f  
mergeSort(data, temp, mid + 1, r); O5-GrR^yt  
else U(y8nI]  
insertSort(data, mid + 1, r - mid); W j^@Zq#  
_$c o Y  
for (i = l; i <= mid; i++) { .,xyE--;d  
temp = data; sV,Yz3E<u$  
} 1L4-;HYJm  
for (j = 1; j <= r - mid; j++) { UWC4PWL,>C  
temp[r - j + 1] = data[j + mid]; YR-G:-(#b  
} h`\ $8 oV  
int a = temp[l]; UHvA43  
int b = temp[r]; lWj*tnnn[  
for (i = l, j = r, k = l; k <= r; k++) { $&Vba@v  
if (a < b) { ZH;4e<gg  
data[k] = temp[i++]; MWA,3I\.  
a = temp; sIf]e'@AC  
} else { Z/G#3-5)p  
data[k] = temp[j--]; mz6]=]1w  
b = temp[j]; RVttk )Ny  
} TG$ #aX\'  
} >"b W'  
} iSezrN  
GkI'.  
/** XdCP!iq*8  
* @param data E#:!&{O  
* @param l =EFh*sp  
* @param i _MTZuhY  
*/ L7buY(F(  
private void insertSort(int[] data, int start, int len) { 6CHb\k  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0H>gMXWE]  
} zu{K"7Bx  
} p4f9v:b[  
} 7Qd$@  m  
} xH:L6K/c  
\z.bORy  
堆排序: ~9FL]qo  
A)"L+Yu5  
package org.rut.util.algorithm.support; ub~ t}  
^.8~}TT-U  
import org.rut.util.algorithm.SortUtil; A1+:y,wXs  
A(E}2iP9=  
/** 3{?X>6T  
* @author treeroot s2SV   
* @since 2006-2-2 y4h =e~  
* @version 1.0 $rcv@-l  
*/ ;K\2/"$QD  
public class HeapSort implements SortUtil.Sort{ }WIkNG4{Z  
E,.PT^au  
/* (non-Javadoc) uM1$3<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SXqB<j$.;  
*/ /i>n1>~yn  
public void sort(int[] data) { ]-X6Cl  
MaxHeap h=new MaxHeap(); D tZ?sG  
h.init(data); @a@}xgn{  
for(int i=0;i h.remove(); _xCYh|DlQ|  
System.arraycopy(h.queue,1,data,0,data.length); aq_K,li #w  
} }p*|8$#x"  
x6R M)rr  
private static class MaxHeap{ E8r6P:5d`  
N Nk  
void init(int[] data){ u:|^L]{  
this.queue=new int[data.length+1]; qH4|k 2Lm  
for(int i=0;i queue[++size]=data; g&y (-  
fixUp(size); <A Hzs  
} R;Dj70g  
} ;LP3  
Wjl2S+Cc  
private int size=0; n46!H0mJ  
H~s8M  
private int[] queue; <L4$f(2  
3S+9LOrhY  
public int get() { PF/K&&9}  
return queue[1]; #)~u YQ  
} 63l& ihj  
f4P({V  
public void remove() { ^zV_ vB)n  
SortUtil.swap(queue,1,size--); C\5G43`  
fixDown(1); QyVAs;  
} )S+fc=  
file://fixdown vx($o9  
private void fixDown(int k) { XjL3Ar*  
int j; yYJ_;Va  
while ((j = k << 1) <= size) { M;y*`<x  
if (j < size %26amp;%26amp; queue[j] j++; I m I$~q'  
if (queue[k]>queue[j]) file://不用交换 a r8iuwfZ  
break; gyAJ#N|  
SortUtil.swap(queue,j,k); [G$#jUt/O  
k = j; Rmmu#-{Y  
} \O "`o4  
} kHhp;<  
private void fixUp(int k) { RVm-0[m}  
while (k > 1) { o 7kg.w|  
int j = k >> 1; #&kj>   
if (queue[j]>queue[k]) /J-'[Mc'D[  
break; xkRMg2X.>9  
SortUtil.swap(queue,j,k); kqih`E9P7B  
k = j; Skci;4T(  
} 1}la)lC  
} k^;n$r"i5  
wO%lM  
} xSD*e 0  
M;<!C%K>  
} J$yq#LBbR@  
G-)e(u   
SortUtil: Nf!N;Cy?  
_-({MX[3k<  
package org.rut.util.algorithm; kQbZ!yl>[  
}ZVond$y4  
import org.rut.util.algorithm.support.BubbleSort; b)'CP Cu*  
import org.rut.util.algorithm.support.HeapSort; _N|%i J5  
import org.rut.util.algorithm.support.ImprovedMergeSort;  ,==_u  
import org.rut.util.algorithm.support.ImprovedQuickSort; v}u]tl$,  
import org.rut.util.algorithm.support.InsertSort; =>5Lp  
import org.rut.util.algorithm.support.MergeSort; BM?!?  
import org.rut.util.algorithm.support.QuickSort; kE<CuO  
import org.rut.util.algorithm.support.SelectionSort; l,h`YIy  
import org.rut.util.algorithm.support.ShellSort; W>a}g[Ad  
YRV h[Bqg`  
/** KJQ8Yhq  
* @author treeroot N,qo/At}R[  
* @since 2006-2-2 +7w5m  
* @version 1.0 rZdOU?U  
*/ Jyg1z,B <  
public class SortUtil { ?SgFD4<~P  
public final static int INSERT = 1; aXj UDu7  
public final static int BUBBLE = 2; AVD hgJv  
public final static int SELECTION = 3; M^oL.'  
public final static int SHELL = 4; xP'0a  
public final static int QUICK = 5; Ty&1R?  
public final static int IMPROVED_QUICK = 6; YSGE@  
public final static int MERGE = 7; :5/Ue,~ag  
public final static int IMPROVED_MERGE = 8; EF:ec9 .  
public final static int HEAP = 9; d lfjx  
5&Yt=)c\  
public static void sort(int[] data) { zs]ubJC@  
sort(data, IMPROVED_QUICK); >&;J/ME  
} ]'Eg2(wy  
private static String[] name={ $,by!w'e:l  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D%o(HS\E  
}; x+4K,r;  
|x1OWm1:<  
private static Sort[] impl=new Sort[]{ G@ ot^n3  
new InsertSort(), UZs '[pm)  
new BubbleSort(), Jkj7ty.J  
new SelectionSort(), kl:/PM^  
new ShellSort(), Ywhhs }f  
new QuickSort(), qX\85dPn@}  
new ImprovedQuickSort(), -(TC'  
new MergeSort(), .TA)|df ^  
new ImprovedMergeSort(), El9T>!Z  
new HeapSort() 5r 4~vK  
}; 7I w^  
#sCR}  
public static String toString(int algorithm){ ?P[:,0_  
return name[algorithm-1]; q-Z<.GTq  
} m]U  
KdozB!\  
public static void sort(int[] data, int algorithm) { aPxSC>p  
impl[algorithm-1].sort(data); 9~Sa7P  
} C2rG3X^~Jm  
S\N l|U[  
public static interface Sort { " J9  
public void sort(int[] data); 5fk A?Ecqq  
} 3HtM<su*h  
wwdmz;0S  
public static void swap(int[] data, int i, int j) { P<R^eLZ<&  
int temp = data; DI8I'c-P  
data = data[j]; Wtu-g**KN  
data[j] = temp; >mA]2gV<a  
} Y<W9LF  
} iSf%N>y'K  
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