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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。 CWeQv9h]X  
插入排序: Dspvc  
Pyuul4(  
package org.rut.util.algorithm.support; )<HvIr(xr  
:WRD<D_4  
import org.rut.util.algorithm.SortUtil; uzxwJs'fz  
/** = 9Yf o,F  
* @author treeroot y CHOg  
* @since 2006-2-2 VKPEoy8H  
* @version 1.0 i1x4$}  
*/ *w;?&)8%  
public class InsertSort implements SortUtil.Sort{ S }`f&  
f2c <-}wR  
/* (non-Javadoc) N&G'i.w/  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D zD5n  
*/ ~2>Adp  
public void sort(int[] data) { mo<*h&;&  
int temp; 2:|vJ<Q  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); BP j?l  
} b#@xg L*D  
} ~ox}e(x y  
} n#}@| "J  
3chx 4  
} WzFXF{(  
A!GvfmzqIn  
冒泡排序: vk|f"I  
B{\Y~>]Pj  
package org.rut.util.algorithm.support; l1]N&jN{  
(LsVd2AbR  
import org.rut.util.algorithm.SortUtil; d_(>:|o h  
z$1|D{  
/** (ORbhjl  
* @author treeroot EPW4 h/I  
* @since 2006-2-2 hRXnig{;3  
* @version 1.0 +F NGRL  
*/ ;uAh)|;S#  
public class BubbleSort implements SortUtil.Sort{ >e;jGk?-  
/ xv5we~  
/* (non-Javadoc) 1 K}gX>F  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~Q=;L>Qd  
*/ 1$DcE>  
public void sort(int[] data) { oC" [rn  
int temp; {$EX :ID  
for(int i=0;i for(int j=data.length-1;j>i;j--){ Re~6 '  
if(data[j] SortUtil.swap(data,j,j-1); V_ (Ly8"1;  
} =xkaF)AW&v  
} ]+`K\G ^X  
} TNh&g.  
} V^tD@N  
T x Mh_  
} J8\l'} ?&  
f~l pa7  
选择排序: a4uy}@9z  
:V6 [_VaF  
package org.rut.util.algorithm.support; Up%XBA  
_t,aPowX  
import org.rut.util.algorithm.SortUtil; zW\a)~ E  
%H?B5y  
/** q/ :]+  
* @author treeroot j8Mt"B  
* @since 2006-2-2 `~\SQ EY$  
* @version 1.0 dlyGgaV*X  
*/ kT   
public class SelectionSort implements SortUtil.Sort { Mm,\e6#*  
>7@,,~3  
/* YCP D+  
* (non-Javadoc) ta.Lq8/  
* CSjd&G *ZB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3_G0eIE"u  
*/ Ma\%uEgTD  
public void sort(int[] data) { 5Kd"W,  
int temp; 5vD\?,f E  
for (int i = 0; i < data.length; i++) { h)sT37  
int lowIndex = i; EyR/   
for (int j = data.length - 1; j > i; j--) { vg?(0Gasm*  
if (data[j] < data[lowIndex]) { 6{d?3Jk  
lowIndex = j; f\?Rhyz  
} :!Z|_y{b  
} FLJ&ZU=s  
SortUtil.swap(data,i,lowIndex); ~c&sr5E  
} |5>A^a  
} \aPH_sf,  
A%EhRAy  
} ,y"vf^BE.  
+EA ")T<l  
Shell排序: A]Hz?i  
y)L X?d  
package org.rut.util.algorithm.support; _GY2|x2c  
cb'Y a_  
import org.rut.util.algorithm.SortUtil; s8:epcL`A  
pno}`Cer  
/** ]~$@x=p2e  
* @author treeroot 1 39T*0C  
* @since 2006-2-2 k]gPMhe  
* @version 1.0 p".wqg*W  
*/ q%k&O9C2]  
public class ShellSort implements SortUtil.Sort{ <x$nw'H9  
kqZRg>1A  
/* (non-Javadoc) h('5x,G%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !m=Js"  
*/ 'H`:c+KDG`  
public void sort(int[] data) { w9u|E46  
for(int i=data.length/2;i>2;i/=2){ *:\[;69[  
for(int j=0;j insertSort(data,j,i); vS ( Y_6  
} iiuT:r  
} })8D3kzX)  
insertSort(data,0,1); Qd~7OH4Lp  
} [V /f{y~ {  
yL<u>S0  
/** hG`@#9|f  
* @param data }'{"P#e8"q  
* @param j +5-|6  
* @param i 6f0o'  
*/ A'}!'1  
private void insertSort(int[] data, int start, int inc) { V@RdvQy  
int temp; _nzTd\L88  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); {c I~Nf?i  
} H!FaI(YZl  
} V*?QZ;hCP  
} /Xc9}~t6  
1fJ~Wp @1  
} N DI4EA~z  
2 N(Z^  
快速排序: ,d!@5d&Zi  
xIc||o$  
package org.rut.util.algorithm.support; -1$z=,q'  
ORqqzy +  
import org.rut.util.algorithm.SortUtil; :SwA) (1  
H #X*OJ  
/** v:!TqfI  
* @author treeroot 3GL?&(eU;  
* @since 2006-2-2 ":sp0(`h  
* @version 1.0 ~c+=$SL-=  
*/ z<P?p  
public class QuickSort implements SortUtil.Sort{ OP=oSfa  
T6?03cSE  
/* (non-Javadoc) V_^pPBa  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [T'[7 Z  
*/ .`u8(S+  
public void sort(int[] data) { Bk~lM'  
quickSort(data,0,data.length-1); %H_-`A`  
} >^W6'Q$P<  
private void quickSort(int[] data,int i,int j){ vEG7A$Z"  
int pivotIndex=(i+j)/2; c9@3=6S/  
file://swap #u"@q< )  
SortUtil.swap(data,pivotIndex,j); FP y}Wc*UA  
6]GHCyo  
int k=partition(data,i-1,j,data[j]); st.{AEv@  
SortUtil.swap(data,k,j); t0xE&#4  
if((k-i)>1) quickSort(data,i,k-1); W}7Uh b  
if((j-k)>1) quickSort(data,k+1,j); 6o]{< T/'  
x~m$(LT  
} ~Sf'bj;(  
/** 7F2:'3SQ  
* @param data -d2)  
* @param i 7Kj7or|  
* @param j %WP[V{,F  
* @return C\Ob!sv%H  
*/ )_Hv9!U]e  
private int partition(int[] data, int l, int r,int pivot) { fMHw=wJQ  
do{ HdY#cVxy  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Y[VXx8"p  
SortUtil.swap(data,l,r); 0%|)=T3Slu  
} _h,X3P   
while(l SortUtil.swap(data,l,r); #5^OO ou|  
return l; fQ.S ,lMe  
} &eO.h%@  
+|<bb8%  
} -)&lsFF  
2=<,#7zlJ  
改进后的快速排序: } nIYNeP?D  
L*p7|rq$"  
package org.rut.util.algorithm.support; I"8Z'<|/\q  
~rq:I<5  
import org.rut.util.algorithm.SortUtil; Xmb##:  
Jp8,s%  
/** W?N+7_%'  
* @author treeroot _TJk Yz$  
* @since 2006-2-2 +?QHSIQo  
* @version 1.0 VgY6M_V  
*/ q)@;8Z=_c  
public class ImprovedQuickSort implements SortUtil.Sort { <Vh5`-J  
<Nloh+n=  
private static int MAX_STACK_SIZE=4096; t"~X6o|R  
private static int THRESHOLD=10; 1 K^-tms  
/* (non-Javadoc) )-iUUak  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5,O:"3>c  
*/ ZOppec1D  
public void sort(int[] data) { eH*i_g'  
int[] stack=new int[MAX_STACK_SIZE]; 3qV~C{ S  
"WPWMQ+  
int top=-1; cdI"=B+C\  
int pivot; &P*r66  
int pivotIndex,l,r; n~jW  
:.{d,)G  
stack[++top]=0; @.dM1DN)  
stack[++top]=data.length-1; }lq$Fi/  
WhFE{-!gX  
while(top>0){ vZ6R>f  
int j=stack[top--]; P $r!u%W  
int i=stack[top--]; 3+ C;zDKa  
VVuNU"-  
pivotIndex=(i+j)/2; f*m^x7  
pivot=data[pivotIndex]; QD-Bt=S7l  
{ q&`B  
SortUtil.swap(data,pivotIndex,j); r' |ei,  
,>kXn1 ,  
file://partition !WB3%E,I  
l=i-1; >*|Eyv_  
r=j; *Hv d  
do{ DU5rB\!.~  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ^|!\IzDp  
SortUtil.swap(data,l,r); _?$')P|  
} z,!A4ws  
while(l SortUtil.swap(data,l,r); G!D~*B9 G  
SortUtil.swap(data,l,j); hy~KY6Ta  
^g<Lu/5w  
if((l-i)>THRESHOLD){ R&'Mze fb  
stack[++top]=i; tPw7zFy6r  
stack[++top]=l-1; dJb7d`  
} l{kacfk#  
if((j-l)>THRESHOLD){ k<o<!   
stack[++top]=l+1; >RiU/L  
stack[++top]=j; ~X;sa,)L1+  
}  -l"8L;`  
oChf&W 8u  
} '81Rwp  
file://new InsertSort().sort(data); t?;=\%^<  
insertSort(data); sI#h&V,9  
} IpKI6[2{`f  
/** p@?(m/m$  
* @param data 5a&gdqg]  
*/ # M Y4Mr  
private void insertSort(int[] data) { O=u.J8S2  
int temp; :19s=0  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); {D]I[7f8Ev  
} [H2su|rBI`  
} #m'+1 s L  
} #S|On[Q!  
h`tf!MD]  
} g)<[-Q1  
/pGx !  
归并排序: 1"1ElH  
TP`"x}ACa?  
package org.rut.util.algorithm.support; #yCnM]cEn  
j{m{hVa  
import org.rut.util.algorithm.SortUtil; LsK fCB}  
m .En!~t  
/** "nNT9 K|  
* @author treeroot (d[JMO^@8  
* @since 2006-2-2 ?J"Y4,{  
* @version 1.0 `K2vG`c  
*/ 1-G-p:|  
public class MergeSort implements SortUtil.Sort{ uBaGOW|Pl  
grDz7\i:  
/* (non-Javadoc) #hEU)G' $+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) En8L1$_  
*/ 25;`yB$  
public void sort(int[] data) { X(>aW*q  
int[] temp=new int[data.length]; /\pUA!G)BD  
mergeSort(data,temp,0,data.length-1); >k 2^A  
} 7z8   
hSk  
private void mergeSort(int[] data,int[] temp,int l,int r){ od3b,Q  
int mid=(l+r)/2; z+?48 }  
if(l==r) return ; _`9WNJiL  
mergeSort(data,temp,l,mid); uVw|jj  
mergeSort(data,temp,mid+1,r); S.owVMQ  
for(int i=l;i<=r;i++){ "N=q>jaX  
temp=data; tqU8>d0^  
} z)*\njYe  
int i1=l; 1| xKb (_l  
int i2=mid+1; OJLyqncw  
for(int cur=l;cur<=r;cur++){ YgkQF0+  
if(i1==mid+1) ksqb& ux6  
data[cur]=temp[i2++]; fp"GdkO#}i  
else if(i2>r) v XR27  
data[cur]=temp[i1++]; `u8=~]rblj  
else if(temp[i1] data[cur]=temp[i1++]; x=1Sbs w{  
else pzDz@lAwR  
data[cur]=temp[i2++]; V##TG0  
} O$Dj_R#  
} J]&nZud`  
R9Y{kk0M  
} .zdmUS :  
\@j3/!=,n%  
改进后的归并排序: 'G3|PA7v  
X'cm0}2  
package org.rut.util.algorithm.support; ~rbJtz  
}An;)!>(nF  
import org.rut.util.algorithm.SortUtil; Olq`mlsK  
.1""U ']  
/** i# Fe`Z ~J  
* @author treeroot ]=%u\~AvL  
* @since 2006-2-2 Lor__ K  
* @version 1.0 jx];=IC3tt  
*/ %U&ztvR0C  
public class ImprovedMergeSort implements SortUtil.Sort { -k3WY&9,  
]8XIw`:f  
private static final int THRESHOLD = 10; zS}!87r)  
aDX4}`u  
/* Qlhm:[  
* (non-Javadoc) S)A;!}RK6  
* 1++Fs  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) au7@-_  
*/ FVoKNaK-  
public void sort(int[] data) { <V4"+5cJ8  
int[] temp=new int[data.length]; D+Z,;XZ  
mergeSort(data,temp,0,data.length-1); P6 mDwR  
} 1);E!D[  
ch0x*[N@  
private void mergeSort(int[] data, int[] temp, int l, int r) { DOW Z hD  
int i, j, k; Z , 98  
int mid = (l + r) / 2; :J6FI6  
if (l == r) }+ TA+;  
return; uulzJbV,K  
if ((mid - l) >= THRESHOLD) LQa1p  
mergeSort(data, temp, l, mid); )0 i$Bo  
else S >\\n^SbT  
insertSort(data, l, mid - l + 1); i8(n(  
if ((r - mid) > THRESHOLD) M cbiO)@I  
mergeSort(data, temp, mid + 1, r); ;+VHi%5Z  
else AKKVd% P(  
insertSort(data, mid + 1, r - mid); [{rne2sA  
q&EwD(k  
for (i = l; i <= mid; i++) { N+ei)-  
temp = data; 6)#%36rP  
} T04&Tl'CT  
for (j = 1; j <= r - mid; j++) { 3- 4jSN\  
temp[r - j + 1] = data[j + mid]; yI*h"?7T  
} (:J U  
int a = temp[l]; G)y'exk  
int b = temp[r]; 4 !M6 RL8{  
for (i = l, j = r, k = l; k <= r; k++) { F}_Zh9/$(  
if (a < b) { uBBW2  
data[k] = temp[i++]; \AB*C_Ri  
a = temp; ;Q%3WD  
} else { I6F $@  
data[k] = temp[j--]; R2nDK7j  
b = temp[j]; uWerC?da  
} ;JR_z'<  
} bn"z&g   
} ~1.~4~um  
; WsV.n  
/** f n\&%`U  
* @param data $*dY f  
* @param l !EO 2  
* @param i kpO+  
*/ +8V |  
private void insertSort(int[] data, int start, int len) { O6r.q&U  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ? 1b*9G%i  
} 8]0?mV8iOE  
} eq Wb>$  
} |:d:uj/  
} ` oXL  
jh.e&6  
堆排序: 1"HSM =p  
sh8(+hg  
package org.rut.util.algorithm.support; T1~,.(#  
u=p-]?  
import org.rut.util.algorithm.SortUtil; vpqMKyy  
f%TP>)jag!  
/** u:O6MO9^  
* @author treeroot jj"?#`cW  
* @since 2006-2-2 U-:_4[  
* @version 1.0 Rk52K*Dc  
*/ >dqeGM7Np>  
public class HeapSort implements SortUtil.Sort{ t%>x}b"2T  
U})Z4>[bvt  
/* (non-Javadoc) ||sj*K  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3q0^7)m0  
*/ 7_ah1IEK  
public void sort(int[] data) { KdTna6nY  
MaxHeap h=new MaxHeap(); r$.v"Wh)  
h.init(data);  al:c2o  
for(int i=0;i h.remove(); Q\<^ih51  
System.arraycopy(h.queue,1,data,0,data.length); }x}JzA+2  
} 5mYI5~ p  
r<L>~S>yb  
private static class MaxHeap{ ='|HUxFi  
HxH=~B1"P  
void init(int[] data){ s_N]$3'[E  
this.queue=new int[data.length+1]; h^6Yjy  
for(int i=0;i queue[++size]=data; 2VNfnk  
fixUp(size); #2*2xt  
} t#[u X?  
} -,#LTW<.  
z;En Ay{9  
private int size=0; l<mEGKB#  
k@= LR  
private int[] queue; P(BV J_n  
Z<0+<tt  
public int get() { M.R] hI  
return queue[1]; N%&D(_  
} b/Z 0{38  
#ZRplA~C7]  
public void remove() { -"e$ VB  
SortUtil.swap(queue,1,size--); 5Pl~du  
fixDown(1); :-kXZe  
} m}3POl/*j  
file://fixdown B>&eciY  
private void fixDown(int k) { .8%mi'0ud  
int j; )vFZl]  
while ((j = k << 1) <= size) { (e;9 ,~u)  
if (j < size %26amp;%26amp; queue[j] j++; P>t[35/1  
if (queue[k]>queue[j]) file://不用交换 U)N_/  
break; 6|D,`dk3U  
SortUtil.swap(queue,j,k); VX;tg lu2  
k = j; %Sdzr!I7*  
} b(~ gQM  
} O/=i'0X v  
private void fixUp(int k) { ;Q =EI%_tv  
while (k > 1) { h7S&tW GU  
int j = k >> 1; .1F^=C.w  
if (queue[j]>queue[k]) H19CVc\B  
break; k98}Jx7J)"  
SortUtil.swap(queue,j,k); L){rv)?="  
k = j; ^f,('0p- >  
} XHlx89v7  
} +$+'|w  
n'#(iW)f  
}  ,JcQp=g  
1!E+(Iq  
} k+S 6)BQ7U  
&,Xs=Lv mq  
SortUtil: vx\h Njb  
X=p~`Ar M{  
package org.rut.util.algorithm; -R;.Md_  
WM}bM] oe  
import org.rut.util.algorithm.support.BubbleSort; 4JHFn [%  
import org.rut.util.algorithm.support.HeapSort; oIM]  
import org.rut.util.algorithm.support.ImprovedMergeSort; ya'@AJS  
import org.rut.util.algorithm.support.ImprovedQuickSort; /N ^%=G#  
import org.rut.util.algorithm.support.InsertSort; Dn?P~%  
import org.rut.util.algorithm.support.MergeSort; $W8  
import org.rut.util.algorithm.support.QuickSort; G1"=}Wt`  
import org.rut.util.algorithm.support.SelectionSort; D>O{>;y[  
import org.rut.util.algorithm.support.ShellSort; ^J>jU`)CJ  
6#k Ap+g7  
/** 4565U  
* @author treeroot N3nk\)V\E  
* @since 2006-2-2 "l&sDh%Lk<  
* @version 1.0 t _Q/v  
*/ x=qACoq  
public class SortUtil { jBEt!Azur  
public final static int INSERT = 1; q*ZjOqj  
public final static int BUBBLE = 2; { A(= phN  
public final static int SELECTION = 3; By@<N [I@  
public final static int SHELL = 4; d+|8({X]D8  
public final static int QUICK = 5; gtHk1 9  
public final static int IMPROVED_QUICK = 6; >=2nAv/(  
public final static int MERGE = 7; qx"?')+  
public final static int IMPROVED_MERGE = 8; x c-=;|s  
public final static int HEAP = 9; 56o?=|  
dxkXt  k  
public static void sort(int[] data) { @Ey(0BxNu  
sort(data, IMPROVED_QUICK); MWCP/~>a2  
} C<6IiF[>%  
private static String[] name={ @Ns^?#u~   
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m4n J9<-  
}; xnu|?;.}!  
+MQf2|--  
private static Sort[] impl=new Sort[]{ A;h0BQm/j  
new InsertSort(), I/GZ  
new BubbleSort(), %f@VOSs  
new SelectionSort(), C/[2?[  
new ShellSort(), SF;;4og  
new QuickSort(), 8jjJ/Mz`  
new ImprovedQuickSort(), -{ZTp8P>  
new MergeSort(), AdB5D_ Ir  
new ImprovedMergeSort(), .l*]W!L]  
new HeapSort() j~"X`:=  
}; fh \<tnY  
H#G~b""mY  
public static String toString(int algorithm){ 11 .RG *  
return name[algorithm-1]; HqU"i Y>b  
} 3;j?i<kM  
}_M .-Xm  
public static void sort(int[] data, int algorithm) { A{;b^ IK  
impl[algorithm-1].sort(data); ''wWw(2O  
} r}QW!^F  
;=6 ++Oq  
public static interface Sort { 8@/]ki `>  
public void sort(int[] data); v^[Ny0cM  
} ,KIa+&vJW@  
0ldde&!p  
public static void swap(int[] data, int i, int j) { 8\y%J!b  
int temp = data; `a2Oj@jP  
data = data[j]; C>@~W(IE  
data[j] = temp; g=[ F W@z  
} qrNW\ME  
} (^9q7)n  
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