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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。 i(z+a6^@|  
插入排序: XWc|[>iO  
|<'10  
package org.rut.util.algorithm.support; C~:b*X   
7Z VVR*n|  
import org.rut.util.algorithm.SortUtil; 4fD`M(wv  
/** X CV0.u |  
* @author treeroot *:(1K%g  
* @since 2006-2-2 M$#+W?m&  
* @version 1.0 01-p `H+  
*/ Qk|( EFQ9  
public class InsertSort implements SortUtil.Sort{ d{?)q  
e5FCqNip'  
/* (non-Javadoc) 2,+@# q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rdFs?hO  
*/ Hc>([?P%t  
public void sort(int[] data) { 8R&z3k;!t  
int temp; XpOCQyFnM  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ~;TV74~rr  
} Mi<*6j0  
} i4 P$wlO  
} =SA 4\/  
Bk@bN~B4  
} 20n%o&kG]8  
oUCS |  
冒泡排序: sek6+#|=  
h!ZZ2[  
package org.rut.util.algorithm.support; Qb@BV&^y&  
d"z *Nb  
import org.rut.util.algorithm.SortUtil; LZbRQ"!!o  
gq=0L:  
/** Ni&,g  
* @author treeroot Dy98[cL  
* @since 2006-2-2 \]Kq(k[p  
* @version 1.0 }'%$7vL`Ft  
*/ UnJi& ~O  
public class BubbleSort implements SortUtil.Sort{ Ua}g  
K@I+]5E%?  
/* (non-Javadoc) #@IQlqJfY7  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n (9F:N  
*/ Lqg7D\7j  
public void sort(int[] data) { l)|z2 H  
int temp; !d/`[9jY  
for(int i=0;i for(int j=data.length-1;j>i;j--){ W=q?tD~V  
if(data[j] SortUtil.swap(data,j,j-1); 7l[t9ON  
} A[K:/tB  
} o-~-F+mj#  
} gGF$M `  
} jc3ExOH  
|L*6x S[  
} 9 Wxq)  
7$;c6_se  
选择排序: h<t<]i'  
.n?5}s+q  
package org.rut.util.algorithm.support; "#[o?_GaJ  
\xy:6gd:  
import org.rut.util.algorithm.SortUtil; T]5U_AI@  
O<gP)ZW~  
/** FA5k45w L  
* @author treeroot T[`QO`\5O  
* @since 2006-2-2 V*0Y_T{_  
* @version 1.0 9 ?EY.}~  
*/ LPtx|Sx![  
public class SelectionSort implements SortUtil.Sort { +# m   
<!$j9)~x  
/* 0]f?Dx/8  
* (non-Javadoc) {6REfY c  
* ;Of?fe5:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q&\ZC?y4  
*/ D7 8) 4>X  
public void sort(int[] data) { Z?.:5#  
int temp; jFI]54,  
for (int i = 0; i < data.length; i++) { EuhF$L1  
int lowIndex = i; 2n<qAl$t  
for (int j = data.length - 1; j > i; j--) { 37GHt9l  
if (data[j] < data[lowIndex]) { &QiAM`MbC=  
lowIndex = j; / n C$?w  
} hg)!m\g  
} n:%'{}Jw  
SortUtil.swap(data,i,lowIndex); aTmX!!  
} P#M<CG9  
} e!O &~#'h}  
M$DwQ}Z  
} $6qR/#74  
>EPaZp6  
Shell排序: pZNlcB[Qn-  
P7M0Ce~iW  
package org.rut.util.algorithm.support; ^v()iF !  
&@Ji+  
import org.rut.util.algorithm.SortUtil; 'eTpcrS3  
dA3`b*nC  
/** 4c493QOd  
* @author treeroot r-Xjy*T  
* @since 2006-2-2 R$~JhcX*l'  
* @version 1.0 ZVCv(J  
*/ JC1BUheeb  
public class ShellSort implements SortUtil.Sort{ ?Vb=4B{~  
^^U)WB  
/* (non-Javadoc) @DjG? yLK$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YQlpk@X`2  
*/ )[a?J,  
public void sort(int[] data) { M $E8:  
for(int i=data.length/2;i>2;i/=2){ [bQ8A(u  
for(int j=0;j insertSort(data,j,i); ^+YGSg7  
} [xH2n\7  
} IWSEssP  
insertSort(data,0,1); m"k i*9]  
} 2g`uC}  
 @=^jpSnZ  
/** Xlgz.j7XR  
* @param data .-gm"lB  
* @param j LQuYCfj|  
* @param i B%?|br  
*/ (rCPr,@0  
private void insertSort(int[] data, int start, int inc) { l%3Q=c  
int temp; G!fE'B  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); s`dkEaS  
} zjhR9  
} 8I|1P l  
} ]MBJ"1F  
TO8\4p*tE  
} 0Mzc1dG:  
}pU!1GsO  
快速排序: et7T)(k0  
4%Wn}@  
package org.rut.util.algorithm.support; h_}BmJh_  
Amq8q  
import org.rut.util.algorithm.SortUtil; KH CdO  
2T{-J!k  
/** wN%DM)*k  
* @author treeroot Z2Y583D  
* @since 2006-2-2 <CdG[Ih  
* @version 1.0 RaJ }>e  
*/ FkkZyCqZ`  
public class QuickSort implements SortUtil.Sort{ n$Oky-P"  
^~hhdwu3a  
/* (non-Javadoc) {yl/T:Bh&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `~s,W.Eu4  
*/ =Am*$wGI  
public void sort(int[] data) { 7xa@wa?!L  
quickSort(data,0,data.length-1); oBGstt@  
} ~`Gcq"7, !  
private void quickSort(int[] data,int i,int j){ pR^Y|NG!  
int pivotIndex=(i+j)/2; qhHRR/p  
file://swap 0V>N#P]  
SortUtil.swap(data,pivotIndex,j); &bRxy`ZH  
[sh"?  
int k=partition(data,i-1,j,data[j]); I'wk/  
SortUtil.swap(data,k,j); d}A2I  
if((k-i)>1) quickSort(data,i,k-1); rSFXchD/  
if((j-k)>1) quickSort(data,k+1,j); mU0r"\**c3  
Ny&Fjzl  
} 4N^Qd3[d  
/** :j50]zLy{  
* @param data hghto \G5Y  
* @param i x%Y a*T  
* @param j DqC}f#  
* @return %v6]>FNP'3  
*/ ]idD&5gd  
private int partition(int[] data, int l, int r,int pivot) { 7Q4Pjc D  
do{ &?ed.V@E5  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); [Z`:1_^0}  
SortUtil.swap(data,l,r); 3qwYicq,  
} @R Yb-d  
while(l SortUtil.swap(data,l,r); pDnFT2  
return l; kJ5?BdvM&  
} u\& [@v  
%0M^  
} j7| \)x,  
. I9] `Q  
改进后的快速排序: <38@b ]+  
7ump:|  
package org.rut.util.algorithm.support; #j ~FA3O  
]> "/<"  
import org.rut.util.algorithm.SortUtil; R5~vmT5W  
;ZW}47:BS6  
/** jgfP|oD  
* @author treeroot "rlSK >`  
* @since 2006-2-2 R@{/$p:  
* @version 1.0 ^# g;"K0  
*/ z4%F2Czai&  
public class ImprovedQuickSort implements SortUtil.Sort { W1,L>Az^Ts  
|$-d, ] V  
private static int MAX_STACK_SIZE=4096; -JW6@L@  
private static int THRESHOLD=10; ="nrq&2  
/* (non-Javadoc) M:q ;z(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ("@V{<7(t  
*/ *'S%gR=Aa+  
public void sort(int[] data) { )|1JcnNSa  
int[] stack=new int[MAX_STACK_SIZE]; D0_x|a  
g(F*Y> hk  
int top=-1; S5JR`o  
int pivot; ReGb .pf  
int pivotIndex,l,r; K*i1! "w  
Ac(Vw%  
stack[++top]=0; 4I[FE;^  
stack[++top]=data.length-1; #YMp,i  
<$Kv^Y*  
while(top>0){ ^cXL4*_=  
int j=stack[top--]; |@9I5Eg)iE  
int i=stack[top--]; &@Gu~)^(  
s 7cyo ]  
pivotIndex=(i+j)/2; ~;4k UJD  
pivot=data[pivotIndex]; +W3>Yg%)X  
B*?PB]  
SortUtil.swap(data,pivotIndex,j); >+LgJo R  
v\tbf  
file://partition =id $  
l=i-1; 3B|-xq;]I  
r=j; "ddH7:(k<  
do{ j24  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); KO;61y:  
SortUtil.swap(data,l,r); ')cgx9   
} gBS#Z.  
while(l SortUtil.swap(data,l,r); SX<mj  
SortUtil.swap(data,l,j); ;Z~.54Pf{d  
F0(Sv\<::  
if((l-i)>THRESHOLD){ eBRP%<=>D  
stack[++top]=i; 3tcsj0Rb  
stack[++top]=l-1; ;GE u.PdxB  
} h*LL(ow5  
if((j-l)>THRESHOLD){ <R8Z[H:bV  
stack[++top]=l+1; t'/;Z:  
stack[++top]=j; ) CTM  
} M HB]'  
ZVR 9vw 28  
} |dzF>8< )  
file://new InsertSort().sort(data); ~,65/O  
insertSort(data); 6OW-Dif^AG  
} JX<W[P>M  
/** n^)9QQ  
* @param data .v&h>@'m  
*/ T1di$8  
private void insertSort(int[] data) { dct#E CT  
int temp; #E@i@'T  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); \)]2Uh|  
} nEEGO~e  
} RUtS_Z&  
} XFe7qt;%  
9 (.9l\h  
} C7_T]e<  
sZDJ+  
归并排序: i?=.; 0[|  
`\0a5UFR  
package org.rut.util.algorithm.support; ?zu{&aOX|  
28yxX431S  
import org.rut.util.algorithm.SortUtil; AAY UXY!  
wKbymmG  
/** % "^XxVJ*  
* @author treeroot e.^9&Fk"N  
* @since 2006-2-2 6|Q'\  
* @version 1.0 ]<LU NxBR  
*/ A\.*+k/B  
public class MergeSort implements SortUtil.Sort{ !c($C   
f~9Y1|6  
/* (non-Javadoc) Vatt9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <~+  
*/ N+75wtLy&  
public void sort(int[] data) { LS$82UB&  
int[] temp=new int[data.length]; ,?/<fxIY  
mergeSort(data,temp,0,data.length-1); R  |%  
} d vxEXy  
wCmv/m  
private void mergeSort(int[] data,int[] temp,int l,int r){ jtY~- @*  
int mid=(l+r)/2; :L0W"$  
if(l==r) return ; -=IM8Dny  
mergeSort(data,temp,l,mid); [ 1GEe  
mergeSort(data,temp,mid+1,r); @NE#P&f  
for(int i=l;i<=r;i++){ fC|u  
temp=data; ~Xw?>&  
} D|:sSld @  
int i1=l; .Tv(1HAc2l  
int i2=mid+1; 9#6/c  
for(int cur=l;cur<=r;cur++){ r ngw6?`n-  
if(i1==mid+1) V5 r7eC  
data[cur]=temp[i2++]; 6Qu*'  
else if(i2>r) `p|vutk)U  
data[cur]=temp[i1++]; >#|Yoc  
else if(temp[i1] data[cur]=temp[i1++]; EPRs%(w`  
else w\*/(E<:  
data[cur]=temp[i2++]; FJ"9Hs2  
} dR:iUw:V  
} KLW+&.re8  
AoeW<}MO  
} &N0|tn  
v{ Ve sf  
改进后的归并排序: ,ua1xsZl&  
7`!( 8  
package org.rut.util.algorithm.support; ]H2aYi$  
$t}1|q|  
import org.rut.util.algorithm.SortUtil; ,[ L$  
1}*;  
/** %m3efaC  
* @author treeroot p> S/6 [X  
* @since 2006-2-2 3PffQ,c[~  
* @version 1.0 Z+(V \  
*/ xltu g##  
public class ImprovedMergeSort implements SortUtil.Sort { x~eEaD5m%J  
$uhDBmb  
private static final int THRESHOLD = 10; zK?[dO  
p04+"  
/* "cM5=;  
* (non-Javadoc) G - WJlu  
* I_7EfAqg(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) It-*CD9  
*/ LP /4e`  
public void sort(int[] data) { fM.|#eLi  
int[] temp=new int[data.length]; k^jCB>b  
mergeSort(data,temp,0,data.length-1); s#ZH.z@J  
} _9r{W65s  
@x +#ZD(  
private void mergeSort(int[] data, int[] temp, int l, int r) { Mk?I}  
int i, j, k; Lm#d.AD)  
int mid = (l + r) / 2; F-0PmO~3+W  
if (l == r) or`stBx  
return; |'_<(z  
if ((mid - l) >= THRESHOLD) [rU8 #4.  
mergeSort(data, temp, l, mid); g1 ,  
else Uiw7Y\Im|  
insertSort(data, l, mid - l + 1); :X*LlN  
if ((r - mid) > THRESHOLD) i{qURP}.  
mergeSort(data, temp, mid + 1, r); !3# }ZC2  
else puF Z~WZ  
insertSort(data, mid + 1, r - mid); ]{^vs'as\  
\l5:A]J  
for (i = l; i <= mid; i++) { ] i2\2MTW8  
temp = data; (=V[tI+Ngt  
} A8GlE  
for (j = 1; j <= r - mid; j++) { 3>v0W@C  
temp[r - j + 1] = data[j + mid]; *DzPkaYD>  
} Dj(7'jT  
int a = temp[l]; Pc== ]H(  
int b = temp[r]; _1Gut"!{\  
for (i = l, j = r, k = l; k <= r; k++) { @8yFM%  
if (a < b) { *!@x<Hf<  
data[k] = temp[i++]; tC-KW~&  
a = temp; kZ%W?#  
} else { %tQ{Hf~  
data[k] = temp[j--]; _!p3M3"$B  
b = temp[j]; ~1sl.8tF  
} A"iD4Q  
} $uynW3h  
} u6T?oK9j  
% 6.jh#C  
/** U-<"i6mg ?  
* @param data !5!$h` g  
* @param l olxP`iK  
* @param i Nn1^#kc  
*/ RGI6W{\  
private void insertSort(int[] data, int start, int len) { @A'1D@f#  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e/jM+%  
} rd4'y~#S  
} yt: V+qdv  
} 5>Yd\(`K  
} gi@ji-10  
q.km>XRk~  
堆排序: N~_jiVD>  
Cbs4`D,  
package org.rut.util.algorithm.support; ?^4sE-C6  
IkNt! 2s_  
import org.rut.util.algorithm.SortUtil; wQB{K3  
N2s%p6RMPD  
/** 6'! {0 5=m  
* @author treeroot =2)t1 H  
* @since 2006-2-2 9yw/-nA  
* @version 1.0 pu*u[n  
*/ 8w?\_P7QA  
public class HeapSort implements SortUtil.Sort{ ;I71_>m  
MPy][^s!  
/* (non-Javadoc) E9 q;>)}  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D#}Yx]Q1  
*/ Am0C|(#Xm  
public void sort(int[] data) { K(fLqXE%  
MaxHeap h=new MaxHeap(); g_c)Ts(  
h.init(data); bv>lm56  
for(int i=0;i h.remove(); jZ,[{Z(N   
System.arraycopy(h.queue,1,data,0,data.length); a;(zH*/XK  
} JMl hBh  
utJVuJw:t  
private static class MaxHeap{ #(g+jb0E  
b7sE  
void init(int[] data){ m>dcb 6B+g  
this.queue=new int[data.length+1]; y]f^`2L!8>  
for(int i=0;i queue[++size]=data; fYM6wYJ  
fixUp(size); ey\{C`(__y  
} UZXcKl>u  
} 8'WMspX  
f<altz_\q  
private int size=0; rtmt 3  
k&iScMgCTH  
private int[] queue; 4{WV  
U]U)'  
public int get() { L^{;jgd&T9  
return queue[1]; 7P^{*!  
} mKQST ]5  
*u;">H*BW  
public void remove() { :_,]?n  
SortUtil.swap(queue,1,size--); "u8o?8+q~  
fixDown(1); i)PV{3v$J  
} %g@3S!lK  
file://fixdown 'qF3,Rw  
private void fixDown(int k) { wW! r}I#  
int j; X+E\]X2  
while ((j = k << 1) <= size) { Dke($Jr{  
if (j < size %26amp;%26amp; queue[j] j++; 6aZt4Lw2\  
if (queue[k]>queue[j]) file://不用交换 yki51rOI*  
break; 3_*Xk. .d  
SortUtil.swap(queue,j,k); Etc?;Z[F#  
k = j; (X_,*3Yxk  
} .>64h H  
} &}6ES{Nr8  
private void fixUp(int k) { M:UB>-`bW  
while (k > 1) { m|2]lb  
int j = k >> 1; $< K)fbG  
if (queue[j]>queue[k]) hN:F8r+DG  
break; 5ZyBP~  
SortUtil.swap(queue,j,k); ) UDJ[pL@  
k = j; avt>saR  
} ~{,vg4L  
} j YIV^o 0  
:e<`U~8m  
} Tb0;Mbr  
x1V2|~;p|  
} !Xx<~l IC  
hp]ng!I{\u  
SortUtil: +fP/|A8P  
v;bP8)mI  
package org.rut.util.algorithm; 3ES[ N.V#  
jo;uRl  
import org.rut.util.algorithm.support.BubbleSort; ZG/8Ds  
import org.rut.util.algorithm.support.HeapSort; Ei9_h  
import org.rut.util.algorithm.support.ImprovedMergeSort; i B!hEbz  
import org.rut.util.algorithm.support.ImprovedQuickSort; =Kt9,d08x  
import org.rut.util.algorithm.support.InsertSort; ]O7.ss/2  
import org.rut.util.algorithm.support.MergeSort; Ns!3- Y  
import org.rut.util.algorithm.support.QuickSort; qM1)3.)[:  
import org.rut.util.algorithm.support.SelectionSort; V)1:LLRW  
import org.rut.util.algorithm.support.ShellSort; yg+IkQDf4U  
0gOrW=  
/** "?eH=!  
* @author treeroot cR=94i=t  
* @since 2006-2-2 =yTa,PY  
* @version 1.0 `zzKD2y  
*/ FSU%?PxO  
public class SortUtil { 0ve`  
public final static int INSERT = 1; ( ztim  
public final static int BUBBLE = 2; =2nn "YVP  
public final static int SELECTION = 3; n,?IcDU~m  
public final static int SHELL = 4; OSa}8rlr'  
public final static int QUICK = 5; 4Ay`rG  
public final static int IMPROVED_QUICK = 6; xjK_zO*dLq  
public final static int MERGE = 7; ^#BGA|j  
public final static int IMPROVED_MERGE = 8; % L >#  
public final static int HEAP = 9; "0'*q<8  
\>Ga-gv6/  
public static void sort(int[] data) { 5@UC c  
sort(data, IMPROVED_QUICK); uh5Pn#da^  
} Cl t5  
private static String[] name={ ,jbGM&.C  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %0NkIQ`C  
}; 6@?aVM~  
5w,Z7I8  
private static Sort[] impl=new Sort[]{ G !1~i*P$u  
new InsertSort(), &>W  (l.  
new BubbleSort(), fKT Dt%  
new SelectionSort(), i+)}aA  
new ShellSort(), 9QH9gdiw  
new QuickSort(), +dCDM1{_a  
new ImprovedQuickSort(), xBL$]>  
new MergeSort(), b'7z DZI]  
new ImprovedMergeSort(), |k`f/*  
new HeapSort() *,W!FxJ  
}; c/<Sa|'  
$"sq4@N  
public static String toString(int algorithm){ g= FDm*  
return name[algorithm-1]; 5?5- ;H  
} =&q-[JW  
FJ{,=@  
public static void sort(int[] data, int algorithm) { n^iNo  
impl[algorithm-1].sort(data); z/Ns5  
} >~5lYD  
g|K6iY  
public static interface Sort { *2,e=tY>  
public void sort(int[] data); ^"O{o8l>2  
}  (# 6<k  
.~.``a  
public static void swap(int[] data, int i, int j) { pHen>BA[  
int temp = data; }XX~ W}M(\  
data = data[j]; 4d^ \l!  
data[j] = temp; MX!u$ei  
} EjR_-8@FK  
} sK`~Csb iB  
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