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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。 `b$I)UUm  
插入排序: *g.,[a0  
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package org.rut.util.algorithm.support; ECfY~qK  
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import org.rut.util.algorithm.SortUtil; 9uo\&,,  
/** x6P^IkL:  
* @author treeroot 2!`Z3>Oa  
* @since 2006-2-2 A[Xw|9  
* @version 1.0 $S=OmdgR  
*/ cv&hT.1  
public class InsertSort implements SortUtil.Sort{ TQfY%GKg(  
"K]4j]yU  
/* (non-Javadoc) E_*T0&P.P  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a MD?^  
*/ } trMQ  
public void sort(int[] data) { ld0WZj  
int temp; [)KfRk?};2  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); sbb{VV`I  
} FpYoCyD}  
} LDNUywj@w  
} &$ 9bC 't6  
 n6dg   
} a#@ opUn-  
|LhuZ_;1xo  
冒泡排序: $x<-PN  
{GY$J<5=  
package org.rut.util.algorithm.support; RAa1KOxZX  
;!Mg,jlQ  
import org.rut.util.algorithm.SortUtil; ttxOP  
_z< q9:  
/** Cr"hu;  
* @author treeroot <]J5AdJ  
* @since 2006-2-2 [:Y^0[2  
* @version 1.0 ijT^gsLL  
*/ ?/g(Y  
public class BubbleSort implements SortUtil.Sort{ Z r*ytbt  
FL}8h/  
/* (non-Javadoc) f5eX%FR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zj}efv<e  
*/ w}0PtzOe  
public void sort(int[] data) { d DTt_B  
int temp; `8*$$JC  
for(int i=0;i for(int j=data.length-1;j>i;j--){ e<pojb1Q  
if(data[j] SortUtil.swap(data,j,j-1); 5 [*jfOz  
} Ei!z? sxzx  
} n+w>Qz'  
} @B <_h+  
} WbF\=;$=7  
jKs8i$q  
} C8-q<t#SF  
*0tNun 5=3  
选择排序: r>OE[C69  
gqamGLK  
package org.rut.util.algorithm.support; :\XD.n-n  
TlJF{ <E  
import org.rut.util.algorithm.SortUtil; nfU}ECun4  
LNW p$"  
/** _7VU ,  
* @author treeroot fNumY|%3  
* @since 2006-2-2 MDZb|1.AT  
* @version 1.0 -8: @xG2  
*/ 7KLq-u-8  
public class SelectionSort implements SortUtil.Sort { 5VS<I\o}  
R8]bi|e)  
/* xC]/i(+bA  
* (non-Javadoc) aeIR}'H|  
* g>{=R|uO5  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +-i@R%  
*/ s4\2lBU?  
public void sort(int[] data) { q}lSnWY[[  
int temp; HvU)GJ u b  
for (int i = 0; i < data.length; i++) { 0o`o'ZV=c  
int lowIndex = i; /6fsh7 \  
for (int j = data.length - 1; j > i; j--) { h&P[9:LH  
if (data[j] < data[lowIndex]) { N~_gT Jr~P  
lowIndex = j; :8FH{sqR  
} 7(-<x@e  
} K>U &jH  
SortUtil.swap(data,i,lowIndex); (G Y`O  
} m;|I}{r  
} J=Z"sU=  
4ai3@f5  
} G9TUU.T  
 K!j2AP3  
Shell排序: Z(cgI5Pu  
G}x^PJJt  
package org.rut.util.algorithm.support; .)Q'j94Q  
>jIc/yEYKI  
import org.rut.util.algorithm.SortUtil; &+p07  
d #su  
/** 8^~]Ym:  
* @author treeroot Cq=c'(cX  
* @since 2006-2-2 Yi3DoaS;"  
* @version 1.0 ^[6AOz+L  
*/ )Lq FZ~B  
public class ShellSort implements SortUtil.Sort{ 4?cg6WJ'6  
f sMF46  
/* (non-Javadoc) uQ}kq7gd  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !{+(oDN  
*/ -ydT%x  
public void sort(int[] data) { u=5^xpI<D  
for(int i=data.length/2;i>2;i/=2){ k 'o?/  
for(int j=0;j insertSort(data,j,i); P]G2gDO  
} lnhZ!_  
} S!uyplYKF  
insertSort(data,0,1); ]`x~v4JU  
} _XN sDW4|  
E;SF f  
/** ;C3](  
* @param data  zcc]5>  
* @param j [F e5a  
* @param i U3>G9g>^B  
*/ >dO^pDSs  
private void insertSort(int[] data, int start, int inc) { {chl+au*l  
int temp; g~]FI  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); W/+0gh7`,(  
} }5|uA/B  
} .nnAI@7E  
} _nF_RpS  
Ec|#i  
} S; >_9  
gBN;j  
快速排序: 7_LE2jpC,5  
fu/v1~X  
package org.rut.util.algorithm.support; [>fE{ ~Y  
pq4frq  
import org.rut.util.algorithm.SortUtil; j`bOJTBE  
QAr1U7{(.  
/** SExd-=G  
* @author treeroot nX~sVG{Q  
* @since 2006-2-2 Y0DBkg  
* @version 1.0 DY%E&Vd:h  
*/ }Q*8QV  
public class QuickSort implements SortUtil.Sort{ -7u4f y{T  
-Rmz`yOq}  
/* (non-Javadoc) MCvjdc3:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h c "n?  
*/ 3OTSLF/  
public void sort(int[] data) { ey:3F%  
quickSort(data,0,data.length-1); VrHFM(RNe  
} Q%6*S!~  
private void quickSort(int[] data,int i,int j){ 6D>o(b2  
int pivotIndex=(i+j)/2; a`}HFHm\2,  
file://swap F2#^5s(  
SortUtil.swap(data,pivotIndex,j); >R6Me*VR  
V\A?1   
int k=partition(data,i-1,j,data[j]); {?82>q5F  
SortUtil.swap(data,k,j); <X:7$v6T|  
if((k-i)>1) quickSort(data,i,k-1); '_2~8w  
if((j-k)>1) quickSort(data,k+1,j); V`G]4}  
D(y=0),  
} lUDzf J}3  
/** <)&;9C  
* @param data 3K{'~?mM  
* @param i 3]T2Zp&;  
* @param j  {sbQf7)  
* @return /" ,]J  
*/ R/iXO~/"J  
private int partition(int[] data, int l, int r,int pivot) { SH"O<c Dp  
do{ jZ)1]Q2  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); {'JoVJKv  
SortUtil.swap(data,l,r); d+l@hgz~  
} &<4Jyhm:o  
while(l SortUtil.swap(data,l,r); V^"5cW  
return l; /Ue~W, |  
} M Su_*&j9T  
R{/nlS5  
} vU::dr  
J 5~bs*a8  
改进后的快速排序: ">|fB&~A  
,?728pfw  
package org.rut.util.algorithm.support; iCx}v[;Ol  
AFyf7^^k  
import org.rut.util.algorithm.SortUtil; VCtj8hKDr  
kd2+k4@#  
/** ZPHB$]ri  
* @author treeroot 7D<M\l8G  
* @since 2006-2-2 5G|(od3  
* @version 1.0 x)s`j(pYC  
*/ Que-  
public class ImprovedQuickSort implements SortUtil.Sort { YajUdpJi  
//xxSk  
private static int MAX_STACK_SIZE=4096; |?g k%g  
private static int THRESHOLD=10; sRqFsj}3e  
/* (non-Javadoc) bNi\+=v<Ys  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?FJU>+{">  
*/ K.B!-<  
public void sort(int[] data) { d=`hFwD9  
int[] stack=new int[MAX_STACK_SIZE]; ngE5$}UM  
qh{hpX)\D  
int top=-1; EHmw(%a|+  
int pivot; ]F P(,:Yw  
int pivotIndex,l,r; id'E_]r  
J#"@~Q+a`@  
stack[++top]=0; ~m'PAC"Q$  
stack[++top]=data.length-1; dL!PpLR$2  
u.43b8!  
while(top>0){ (V 5_q,2  
int j=stack[top--]; <7-3j{065  
int i=stack[top--]; <;G.(CK@n  
[5yLg  
pivotIndex=(i+j)/2; w,n&K6<  
pivot=data[pivotIndex]; edD19A  
bkTk:-L5:  
SortUtil.swap(data,pivotIndex,j); [7 oU =  
)cxLpTr  
file://partition K_;'-B  
l=i-1; ]y:2OP  
r=j; +/E`u|%|\]  
do{ 1%g%I8W%  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 4CCtLHb  
SortUtil.swap(data,l,r); 7M9Ey29f  
} j&~`H:=E  
while(l SortUtil.swap(data,l,r); =f4>vo}@k  
SortUtil.swap(data,l,j); teIUSB[  
8`M) r'5  
if((l-i)>THRESHOLD){ 2N B/&60<  
stack[++top]=i; (= #EJB1(  
stack[++top]=l-1; 8iQ8s;@S&>  
} jOV,q%)^,:  
if((j-l)>THRESHOLD){ EdR1W~JZ  
stack[++top]=l+1; KPTp91  
stack[++top]=j; ,NB?_\$c  
} YBF|0A{[Y  
4Qwv:4La  
} r2"B"%;  
file://new InsertSort().sort(data); UaG })  
insertSort(data); d.>Zn?u4L  
} :%!` R72  
/** a*/%EP3  
* @param data 2"~|k_  
*/ 4;_aFn  
private void insertSort(int[] data) { vf^`'  
int temp; xO3-I@  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); f_'#wc6  
} $^~dqmE2,  
} _!_%Afz  
} apmZ&Ab  
_=$:<wIE[  
} , !0-;H.Y  
0q}k"(9  
归并排序: GE?M. '!{{  
6)5Akyz4V  
package org.rut.util.algorithm.support; 1!/WC.0  
bMU0h,|]  
import org.rut.util.algorithm.SortUtil; n3x< L:)  
BeFCt;  
/** q}x+#[Ef  
* @author treeroot n06T6oc  
* @since 2006-2-2 }*Z *wC  
* @version 1.0 uPh/u!  
*/ ~&{LMf  
public class MergeSort implements SortUtil.Sort{ pd%h5|*n;  
!I)wI~XF)5  
/* (non-Javadoc) #ATV#/hW  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wB%N}bi!  
*/ d x52[W  
public void sort(int[] data) { 4Kl{^2  
int[] temp=new int[data.length]; EUGN`t-M  
mergeSort(data,temp,0,data.length-1); Ga,+  
} 2d:IYCl4q  
\A#YL1hh  
private void mergeSort(int[] data,int[] temp,int l,int r){ Ah#bj8}  
int mid=(l+r)/2; %0&c0vT  
if(l==r) return ; ^VL",Nt  
mergeSort(data,temp,l,mid); ?xX9o  
mergeSort(data,temp,mid+1,r); nNj<!}HvV  
for(int i=l;i<=r;i++){ *gGL5<%T:  
temp=data; A4Sb(X|j  
} ~3'}^V\  
int i1=l; .^hk^r  
int i2=mid+1; &[#iM0;)W0  
for(int cur=l;cur<=r;cur++){ lD+f{GR  
if(i1==mid+1) ]'q"Kw/10  
data[cur]=temp[i2++]; V =9  
else if(i2>r) jt5:rWB  
data[cur]=temp[i1++];  iup "P  
else if(temp[i1] data[cur]=temp[i1++]; CQ;.}=j ,  
else |g)/6jG<-  
data[cur]=temp[i2++]; (:h#H[F  
} mto=_|gn  
} { VK   
rP%B#%;S"  
} sR;^7(f!m  
3OZu v};k  
改进后的归并排序: /k_?S?  
/l6r4aO2=  
package org.rut.util.algorithm.support; r P1FM1"M  
zLt7jxx  
import org.rut.util.algorithm.SortUtil; B QxU~s  
.=`r?#0  
/** ))NiX^)8^  
* @author treeroot SJ0IEPk  
* @since 2006-2-2 e09('SON(  
* @version 1.0 _DD.#YB</  
*/ G?$0OU  
public class ImprovedMergeSort implements SortUtil.Sort { p3`odmbN  
wbImE;-Z  
private static final int THRESHOLD = 10; 8n2MZ9p]  
u#bd*(  
/* HzdyfZ!jR  
* (non-Javadoc) qvHRP@  
* G_cWp D/  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jT:z#B%  
*/ + 7~u_J  
public void sort(int[] data) { n-)Xs;`2  
int[] temp=new int[data.length]; 31*0b|Z  
mergeSort(data,temp,0,data.length-1); .$]%gjIBCl  
} V7}3H2]^  
~E^lKe  
private void mergeSort(int[] data, int[] temp, int l, int r) { Gm1[PAj  
int i, j, k; y/9aI/O'  
int mid = (l + r) / 2; C]01(UoSZ  
if (l == r) D-KQRe2@  
return; aK+jpi4?  
if ((mid - l) >= THRESHOLD) IUZ@n0/T  
mergeSort(data, temp, l, mid); K (!+l  
else ?7k%4~H t  
insertSort(data, l, mid - l + 1); kD?lMA__  
if ((r - mid) > THRESHOLD) a}p}G\b|  
mergeSort(data, temp, mid + 1, r); >Y>>lE! k  
else =[Z uE0c  
insertSort(data, mid + 1, r - mid); iVdY\+N!<  
"54t7  
for (i = l; i <= mid; i++) { &l-1.muQ  
temp = data; 6 {j}Z*)m  
} :*<UCn""  
for (j = 1; j <= r - mid; j++) { N*$L#L$*  
temp[r - j + 1] = data[j + mid]; V/,@hv`+  
} "tX=^4   
int a = temp[l]; BXj]]S2  
int b = temp[r]; .?^a|]  
for (i = l, j = r, k = l; k <= r; k++) { 9]]isE8r  
if (a < b) { CtO;_ ;eD'  
data[k] = temp[i++]; 0; PV gO;9  
a = temp; hH3~O` ~  
} else { [OU[i(,{  
data[k] = temp[j--]; Z8xKg  
b = temp[j]; -:]-g:;/  
} =ICakh!TO  
} ;D>*Pzj  
} ;&$Nn'~a  
d!z}! :  
/** kuI%0) iZn  
* @param data y7Sey;  
* @param l nMT"Rp  
* @param i WUfPLY_c(  
*/ WJA0 `<~  
private void insertSort(int[] data, int start, int len) { 1[U`,(C1  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y(92Th$  
} \LbBK ~l-I  
} i"Z  
} x(r~<a[  
} ):5M +  
Rv=rO|&]  
堆排序: 7,BULs\g  
0<4Nf]i  
package org.rut.util.algorithm.support; kWW$*d$  
XhEJF !  
import org.rut.util.algorithm.SortUtil; vlSSw+r9  
]ur_G`B  
/** QHmF,P  
* @author treeroot )&pcRFl  
* @since 2006-2-2 ^(c.A YI  
* @version 1.0 aFf(m-  
*/ Nfo`Q0\[P  
public class HeapSort implements SortUtil.Sort{ 8Ts_;uId  
g*-%.fNA  
/* (non-Javadoc) N:% }KAc  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Spm7kw  
*/ 2zN"*Wkn  
public void sort(int[] data) { ekV|a1)  
MaxHeap h=new MaxHeap(); >\s8S}p  
h.init(data); U9/6F8D1Y1  
for(int i=0;i h.remove(); q:a-tdv2  
System.arraycopy(h.queue,1,data,0,data.length); d(!g9H  
} P7D__hoE  
{I^@BW-  
private static class MaxHeap{ ,B8u?{O  
n=1_-)  
void init(int[] data){ 8{)j"rghah  
this.queue=new int[data.length+1]; l1#F1q`^t  
for(int i=0;i queue[++size]=data; }T1.~E  
fixUp(size); X :wfmb  
} ~[ZRE @  
} 3<A$lG  
`SM37({c  
private int size=0; *w,C5 f  
=4_Er{AT  
private int[] queue; HB:VpNFn  
0CR~ vQf#r  
public int get() { ,SB5"  
return queue[1]; =,w(D~ps  
} EZb_8<DH  
efUa[XO  
public void remove() {  {,Z-GJ  
SortUtil.swap(queue,1,size--); @{LD_>R  
fixDown(1); $z \H*  
} )8@|+'q  
file://fixdown O+ghw1/  
private void fixDown(int k) { <4%cKW0  
int j; ;,7/>Vt  
while ((j = k << 1) <= size) { }P*x /z~  
if (j < size %26amp;%26amp; queue[j] j++; kC8M2|L  
if (queue[k]>queue[j]) file://不用交换 tcD DX'S  
break; 6i7+.#s  
SortUtil.swap(queue,j,k); JZ>E<U9&  
k = j; ,C;%AS/  
} W<tw],M-#  
} ;w(tXcXZ  
private void fixUp(int k) { /+JHnedK  
while (k > 1) { a,`f`;\7N%  
int j = k >> 1; W:S?_JM  
if (queue[j]>queue[k]) zkb[u"  
break; 'MK"*W8QRM  
SortUtil.swap(queue,j,k); ?&_u$Nn  
k = j; sp8P[W1a  
} eFXQ~~gOj  
} S!6 ? b5  
9?38/2kX4  
} :c}"a(|  
u6MHdCJ0y  
} O]VHX![Y$  
.u3Z*+  
SortUtil: peD7X:K\s  
H_vGa!_  
package org.rut.util.algorithm; /Dj-@7.C/  
-J]j=  
import org.rut.util.algorithm.support.BubbleSort; <1eD*sC?g  
import org.rut.util.algorithm.support.HeapSort; _2~+%{/m,  
import org.rut.util.algorithm.support.ImprovedMergeSort; 5lrjM^E|  
import org.rut.util.algorithm.support.ImprovedQuickSort; H{U(Rt]K  
import org.rut.util.algorithm.support.InsertSort; 5[0W+W  
import org.rut.util.algorithm.support.MergeSort; ,?oC+9w  
import org.rut.util.algorithm.support.QuickSort; ./i5VBP5  
import org.rut.util.algorithm.support.SelectionSort; h\lyt(.s  
import org.rut.util.algorithm.support.ShellSort; :D:Y-cG*n<  
@Pb%dS  
/**  `;HZO8  
* @author treeroot PfjD!=yS=h  
* @since 2006-2-2 H84Zg/ ^  
* @version 1.0 %pj T?G7  
*/ 8z)J rO}  
public class SortUtil { K)N'~jCG  
public final static int INSERT = 1; S=_*<[W%4  
public final static int BUBBLE = 2; - jWXE  
public final static int SELECTION = 3; kHz?vVE/l  
public final static int SHELL = 4; BG^)?_69  
public final static int QUICK = 5; =k\Qx),Ir  
public final static int IMPROVED_QUICK = 6; y"Ios:v@-  
public final static int MERGE = 7; 5a%i%+;N  
public final static int IMPROVED_MERGE = 8; {&uN q^Ch  
public final static int HEAP = 9; ap wA  
+N2R'Phv  
public static void sort(int[] data) { g+%Pg@[  
sort(data, IMPROVED_QUICK); ,Fzuo:{uy  
} L2> )HG  
private static String[] name={ ]=G  dAW  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r,Tq";N'  
}; MHQM'  
ZfVw33z  
private static Sort[] impl=new Sort[]{ OfPv'rW{x  
new InsertSort(), ;U[W $w[  
new BubbleSort(), o-+H-  
new SelectionSort(), AB=Wj*f r  
new ShellSort(), RgSB?  
new QuickSort(), <Gj]XAoe%  
new ImprovedQuickSort(), avy@)iO7  
new MergeSort(), WCyjp  
new ImprovedMergeSort(), KMP[Ledr  
new HeapSort() lXip%6c7  
}; hka`STK{  
0w!:YB,}  
public static String toString(int algorithm){ *0/%R{+S  
return name[algorithm-1]; YJB/*SV^  
} /[+qw%>  
(sp{.bU  
public static void sort(int[] data, int algorithm) { ;7U"wI_~c  
impl[algorithm-1].sort(data); ![ @i+hl  
} Y/]J0D  
xp%LXx j  
public static interface Sort { m2v'zJd}g  
public void sort(int[] data); L*zfZ&  
} 8d[!"lL  
y\XWg`X y  
public static void swap(int[] data, int i, int j) { 48LzI@H&  
int temp = data; u85?f  
data = data[j]; f"Kl? IN8  
data[j] = temp; mk[<=k~  
} ZO& F15$P  
} jygKw+C  
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