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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。 |]m&LC  
插入排序: UiYA#m  
01w=;Q  
package org.rut.util.algorithm.support; ec]ksw6T+  
nt5 ~"8  
import org.rut.util.algorithm.SortUtil; BO{J{  
/** z%;\q$  
* @author treeroot c6lEWC:  
* @since 2006-2-2 kbMIMZC/G  
* @version 1.0 gE$dz#t.  
*/ g#70Sg*d  
public class InsertSort implements SortUtil.Sort{ 3\'.1p  
h hd n9n  
/* (non-Javadoc) |Ec$%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !HB,{+25  
*/ :*oI"U*f  
public void sort(int[] data) { A: @=?(lI3  
int temp; >?$Ze@  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); PD/~@OsxU  
} I&(cdKY z  
} L g%cVSz/C  
} e=F' O] 5  
H-rf?R2  
} *2>%>qu  
+ S%+Ku  
冒泡排序: +h9CcBd  
Ak9W8Z}  
package org.rut.util.algorithm.support; {fGi:b\[ 8  
R=9j+74U  
import org.rut.util.algorithm.SortUtil; Jl9T[QAJn1  
zD?$O7 |ZK  
/** }7C{:H2d  
* @author treeroot zg5 u  
* @since 2006-2-2 Ar):D#D  
* @version 1.0 glv(`cQ  
*/ | z('yy$  
public class BubbleSort implements SortUtil.Sort{ 9(@bjL465  
5Y,e}+I>  
/* (non-Javadoc) F]ALZxwkz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gVI*`$  
*/ -m+2l`DLy  
public void sort(int[] data) { ^ #Wf  
int temp; rgP$\xn-  
for(int i=0;i for(int j=data.length-1;j>i;j--){ h]zx7zt-  
if(data[j] SortUtil.swap(data,j,j-1); \ _i`=dx  
} l"cO@.T3  
} \dfq& oyU\  
} .:lzT"QXI  
} D<rjxP  
]&9f:5',  
} |]I?^:I  
Ik}*7D  
选择排序: O=-|b kO  
T}\U:@b  
package org.rut.util.algorithm.support; &O%Kj8)  
;nC+K z:  
import org.rut.util.algorithm.SortUtil; J%[K;WjrZJ  
WUHx0I  
/** c/hml4  
* @author treeroot kQH!`-n:T  
* @since 2006-2-2 @RnGK 5  
* @version 1.0 3s|tS2^4  
*/ -({\eL$n  
public class SelectionSort implements SortUtil.Sort { L~yy;)]W  
gZPJZN/cpz  
/* f?{Y<M~]  
* (non-Javadoc) &bL1G(}  
* "@f`O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rSZWmns  
*/ r1=Zoxc=w  
public void sort(int[] data) { 9Qkww&VEk  
int temp; JEP"2MN,  
for (int i = 0; i < data.length; i++) { iF 67  
int lowIndex = i; N..u<06j/  
for (int j = data.length - 1; j > i; j--) { 2`Pk@,:_  
if (data[j] < data[lowIndex]) { %V+,#  
lowIndex = j; Us%VB q  
} -(59F  
} j"NqNv  
SortUtil.swap(data,i,lowIndex); ^|x{E20  
} bqe;) A7  
} lLg23k{'  
s@ q54  
} zcNV<tx  
(ncfR  
Shell排序: [XQNgSy?z  
)kd)v4#  
package org.rut.util.algorithm.support; %r>vZ/>a  
w?5b:W,  
import org.rut.util.algorithm.SortUtil; /vQ^>2X%  
|Jq/kmn  
/** >kB?C!\  
* @author treeroot QUe.vb^O  
* @since 2006-2-2 ck@[% ?  
* @version 1.0 oOD|FrlY  
*/ 5q) Eed  
public class ShellSort implements SortUtil.Sort{ {<]abO  
:WxMv~e{U  
/* (non-Javadoc) KS| $_-7 u  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /stED{j,  
*/ `Y[zF1$kz^  
public void sort(int[] data) { M9N|Ql  
for(int i=data.length/2;i>2;i/=2){ HK-?<$Yc  
for(int j=0;j insertSort(data,j,i); o?X\,}-s  
} gr S,PKH  
} tl4;2m3w  
insertSort(data,0,1); SMhT>dB  
} -meKaQv  
GV2}K <s  
/** Z@h]dU5%a  
* @param data My[L3KTTp  
* @param j e@q[Dv'mu  
* @param i +}1]8:>cq  
*/ ooD/QZUE  
private void insertSort(int[] data, int start, int inc) { L3W ^ip4  
int temp; AI)9E=D%  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); dE^'URBiA  
} Yw{](qG7e`  
} wHY;Y-(ZT  
} pG4Hy$e  
! [:K/  
} OC [a?#R1  
HKh)T$IZM  
快速排序: gr7W&2x7\  
Y#Z&$&n  
package org.rut.util.algorithm.support; d5i /:  
tL3(( W"  
import org.rut.util.algorithm.SortUtil; U "}Kth  
xL!05du  
/** HN3 yA1<[V  
* @author treeroot JRNyvG>j  
* @since 2006-2-2 Te.hXCFD  
* @version 1.0 SZ0Zi\W  
*/ 5I<?HsK@  
public class QuickSort implements SortUtil.Sort{ ,fN iZ  
Im Tq`  
/* (non-Javadoc) 2T|L# #C  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fdzd!r1 v  
*/ &?9.Y,  
public void sort(int[] data) { @9L%`=]b^  
quickSort(data,0,data.length-1); *$s)p>  
} eHjR/MMr_  
private void quickSort(int[] data,int i,int j){ [&39Yv.k,7  
int pivotIndex=(i+j)/2; `  ^6}Dn  
file://swap p]>bN  
SortUtil.swap(data,pivotIndex,j); d82IEhZ#  
xE9s=}  
int k=partition(data,i-1,j,data[j]); INkrG.=u  
SortUtil.swap(data,k,j); l/1uP  
if((k-i)>1) quickSort(data,i,k-1); z1L.  
if((j-k)>1) quickSort(data,k+1,j); <oeHZD_ OR  
T @z$g  
} g$:2c7uL  
/** \q,w)BE  
* @param data %%f=aPw  
* @param i %bv<OMD  
* @param j OrH&dY  
* @return <n#JOjHV  
*/ ) wGC=,  
private int partition(int[] data, int l, int r,int pivot) { q|j;dI&  
do{ @!F9}n AP  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 7N""w5  
SortUtil.swap(data,l,r); 2f-Z\3)9 J  
} GRs;-Jt  
while(l SortUtil.swap(data,l,r); @Xh 4ZMyEx  
return l; n =v %}@f2  
} ?+TD2~rD(  
{1qEN_ERx  
} YV2^eGr.  
BkC(9[Ei  
改进后的快速排序: jb*#!m.l  
5H',Bm4-  
package org.rut.util.algorithm.support; n XQg(!  
i?a]v 5  
import org.rut.util.algorithm.SortUtil; R `'@$"  
Rc6Rk!^  
/** 7'<4'BGzl]  
* @author treeroot 36j.is  
* @since 2006-2-2 QzS{2Y[OQ  
* @version 1.0 co*5NM^  
*/ V*/))n?  
public class ImprovedQuickSort implements SortUtil.Sort { k%LE"Q  
:b ;5O3:B  
private static int MAX_STACK_SIZE=4096;  %k2zsM  
private static int THRESHOLD=10; CBvBBt*  
/* (non-Javadoc) LyQO_mT2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rDSt ~ l  
*/ 85X^T]zo  
public void sort(int[] data) { 5 )C~L]  
int[] stack=new int[MAX_STACK_SIZE]; PzF)Vg  
[Z[)hUXE?  
int top=-1; nU`;MW/^w  
int pivot; >U}~Hv]  
int pivotIndex,l,r; w68qyG|wM  
Tq?W @DM*  
stack[++top]=0; q`\lvdl  
stack[++top]=data.length-1; wUSWB{y  
} M1<a4~  
while(top>0){ 7>4t{aRf_8  
int j=stack[top--]; ?/u&U\P  
int i=stack[top--]; x r=f9?%R  
3b_#xr-  
pivotIndex=(i+j)/2; ]>:>":<:  
pivot=data[pivotIndex]; LZ@^ A]U  
jrW7AT)\  
SortUtil.swap(data,pivotIndex,j); x,V_P/?%  
tF;aB*  
file://partition im?nR+t+X  
l=i-1; g)"6|Z?D"  
r=j;  ,cB`j7p(  
do{ D2hvf ^g'*  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); M,[ClQ 9  
SortUtil.swap(data,l,r); R0+m7mx#E  
} !7w-?1?D  
while(l SortUtil.swap(data,l,r); 1DBzD%@Oz  
SortUtil.swap(data,l,j); !K@y B)9  
^8\pJg_0  
if((l-i)>THRESHOLD){ Obd!  
stack[++top]=i; `W/6xm(X5;  
stack[++top]=l-1; "C.$qk]  
} _%>.t  
if((j-l)>THRESHOLD){ !]`]67lC  
stack[++top]=l+1; 6 tzn% ?  
stack[++top]=j; d#W[<,  
} !P;qc  
6z(_^CY  
} k{;:KW|  
file://new InsertSort().sort(data); zZy>XHR H  
insertSort(data); {wm  `  
} DnTM#i:  
/** [;b9'7j'  
* @param data a#{a{>  
*/ ;J _d%  
private void insertSort(int[] data) { Hnaq+ _]  
int temp; n[clYi@e  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 7,jqA"9  
} 7Jqp2\  
} d`xqs,0f  
} 65}:2l2<  
 $SDx) '!  
} !F%dE!  
`?>OY&(  
归并排序: hIw*dob  
6yR7RF}  
package org.rut.util.algorithm.support; JAn3  
)Qo6bei!  
import org.rut.util.algorithm.SortUtil; QR#,n@fE  
bv] ZUF0  
/** ;Rt,"W)  
* @author treeroot k4|YaGhf  
* @since 2006-2-2 {Cd*y6lI  
* @version 1.0 LO2sP"9  
*/ ffWvrY;j[  
public class MergeSort implements SortUtil.Sort{ .h6h&[TEU  
%AJdtJ@0H  
/* (non-Javadoc) FkS{Z s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i7p3GBXh[  
*/ fGxa~Unx  
public void sort(int[] data) { WT0U)x( m5  
int[] temp=new int[data.length]; \0:l9;^4  
mergeSort(data,temp,0,data.length-1); F |GWYw'%  
} `aUA_"f  
@B[V'|  
private void mergeSort(int[] data,int[] temp,int l,int r){ MdPwuXI  
int mid=(l+r)/2; %URyGS]*  
if(l==r) return ; RS93_F8   
mergeSort(data,temp,l,mid); 0lEIj/u  
mergeSort(data,temp,mid+1,r); 3j3AI 7c  
for(int i=l;i<=r;i++){ 9K&b1O@Aj  
temp=data; UR\*KR;yM  
} j jwY{jV  
int i1=l; fu|I(^NV  
int i2=mid+1; 5H5< ft,  
for(int cur=l;cur<=r;cur++){ dW=]|t&  
if(i1==mid+1) %>s y`c  
data[cur]=temp[i2++]; ]02V,'x  
else if(i2>r) ._nhW*  
data[cur]=temp[i1++]; }X`K3sk2/z  
else if(temp[i1] data[cur]=temp[i1++]; R"tLu/Sn  
else F!Uk`[L  
data[cur]=temp[i2++]; * 5j iC  
} +[>m`XTq  
} 2qEy"DKu  
V^Nc0r   
} "B\qp"N  
l^SKd  
改进后的归并排序: v<c8qg  
} o=g)  
package org.rut.util.algorithm.support; @hCGV'4  
M^bujGD  
import org.rut.util.algorithm.SortUtil; +XQS -=  
<?I~ +  
/** 1M+mH#?  
* @author treeroot ^,rbA>/L  
* @since 2006-2-2 L-Hl.UV  
* @version 1.0 |+[ bKqI5  
*/ h  qxe  
public class ImprovedMergeSort implements SortUtil.Sort { m=#2u4H4  
)UxF lp;\  
private static final int THRESHOLD = 10; oZIoY*7IrQ  
BeVQ [  
/* .qHgQ_%  
* (non-Javadoc) !]"T`^5,Y  
* cLXMq"?C  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eQNYfWR  
*/ }6o` in>M  
public void sort(int[] data) { %II |;<  
int[] temp=new int[data.length]; Mbi)mybM  
mergeSort(data,temp,0,data.length-1); lT%o6qgT  
} BO1Mz=q  
{?t=*l\S{w  
private void mergeSort(int[] data, int[] temp, int l, int r) { V43 |Ej}E  
int i, j, k; 7wZKK0;T  
int mid = (l + r) / 2; ~UL; O\-b0  
if (l == r) f-3lJ?6  
return; }?H|9OS  
if ((mid - l) >= THRESHOLD) x&kF;UC  
mergeSort(data, temp, l, mid); khyV uWN  
else 2"13!s  
insertSort(data, l, mid - l + 1); 'Yj/M  
if ((r - mid) > THRESHOLD) UGAP$_j ]P  
mergeSort(data, temp, mid + 1, r); `M|fwlAJQ  
else C`DTPoXN  
insertSort(data, mid + 1, r - mid); O8M;q!)y  
eE7+fMP{  
for (i = l; i <= mid; i++) { j]jwQRe  
temp = data; 5Zh /D0!|  
} )K%AbKn  
for (j = 1; j <= r - mid; j++) { )WD<Q x&  
temp[r - j + 1] = data[j + mid]; &OsJnkY<<  
} JH2d+8O:qK  
int a = temp[l]; Of-l<Ks\  
int b = temp[r]; L-q.Q  
for (i = l, j = r, k = l; k <= r; k++) { oo<,hOv   
if (a < b) { Bl(we/r  
data[k] = temp[i++]; w%`7,d u|  
a = temp; ?a(ApD\  
} else { 4D0"Y #&G  
data[k] = temp[j--]; $_NVy>\&  
b = temp[j]; Z~v.!j0  
} ;Q\Duj  
} l].dOso$`  
} O,hT< s "  
VBy=X\w]  
/** V:yia^1  
* @param data \]GBd~i<  
* @param l `2}Mz9mk  
* @param i C?X^h{T p  
*/ lNqYpyvy*  
private void insertSort(int[] data, int start, int len) { xMU4Av[{  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =r#of|`Q  
} pYH#Vh  
} s_u@8e 6_  
} va| 1N/&  
} LG@5Z-  
r 5:DIA!  
堆排序: /wKL"M-%  
lor jMS  
package org.rut.util.algorithm.support; U+URj <)  
fgq#Oi}  
import org.rut.util.algorithm.SortUtil; L`tr7EEr  
[>v.#:YM^  
/** +Y6=;*j$  
* @author treeroot E]i3E[T  
* @since 2006-2-2 ]w"r4HlCx  
* @version 1.0 [Jwo,?w  
*/ ' 4ftclzL  
public class HeapSort implements SortUtil.Sort{ j$,:cN  
$O?&!8);,  
/* (non-Javadoc) 3D(/k%;)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R8sj>.I9j  
*/ 0M>+.}e+  
public void sort(int[] data) { 4uwI=UUB  
MaxHeap h=new MaxHeap(); DFcgUEq  
h.init(data); EH=[!iW;  
for(int i=0;i h.remove(); X6kCYTJYF  
System.arraycopy(h.queue,1,data,0,data.length); H)ud?vB6  
} MQ7N8@!t  
,eW K~ pa  
private static class MaxHeap{ JN,4#,  
^cn%]X#.  
void init(int[] data){ Il`35~a  
this.queue=new int[data.length+1]; =# <!s!  
for(int i=0;i queue[++size]=data; JgEPzHgx  
fixUp(size); ">@]{e*  
} K)QM xn  
} 0NL~2Qf_4  
C|*U)#3:F  
private int size=0; W9+H /T7!  
I r]#u]Ap  
private int[] queue; OWx-I\:  
;p)RMRMg  
public int get() { 3MH9%*w'0  
return queue[1]; Zi/ tax9C  
} u $O` \=  
oSq?. *w<  
public void remove() { ark~#<SqAr  
SortUtil.swap(queue,1,size--); #rD0`[pz  
fixDown(1); clV3x` z  
} m&a.i B  
file://fixdown W US[hx,  
private void fixDown(int k) { H|JPqBNRh  
int j; Jz<-B  
while ((j = k << 1) <= size) { 98'/yZ  
if (j < size %26amp;%26amp; queue[j] j++; g 0O~5.f  
if (queue[k]>queue[j]) file://不用交换 F>RL&i  
break; Q8. =w  
SortUtil.swap(queue,j,k); ]Dec/Nnj  
k = j; : 7>oFz  
} iI.pxo s  
} _Wg?H:\  
private void fixUp(int k) { 69N/_V  
while (k > 1) { 3CcCcZ9I  
int j = k >> 1; h}0}g]IUx  
if (queue[j]>queue[k]) o^+2%S`]  
break; 5 nF46c  
SortUtil.swap(queue,j,k); +Np[m$Z *  
k = j; MkLXMwuQ&  
} kD;1+lNz  
} P|j|0o,8p  
Cw$0XyO  
} n/9.;9b$I  
`xv2,Z9<  
} UI2TW)^2  
/o L& <e  
SortUtil: pW5ch"HE  
#!?jxfsFa  
package org.rut.util.algorithm; ?TWve)U  
*^ aEUp6&  
import org.rut.util.algorithm.support.BubbleSort; h @AKfE!\~  
import org.rut.util.algorithm.support.HeapSort; )SU\s+"M  
import org.rut.util.algorithm.support.ImprovedMergeSort; /~~A2.=.  
import org.rut.util.algorithm.support.ImprovedQuickSort; fVJlA  
import org.rut.util.algorithm.support.InsertSort; 4|U$ON?x  
import org.rut.util.algorithm.support.MergeSort; O"^3,-  
import org.rut.util.algorithm.support.QuickSort;  R.x^  
import org.rut.util.algorithm.support.SelectionSort; Y=83r]%  
import org.rut.util.algorithm.support.ShellSort; nSy{ {d  
RISDjU3  
/** $/p0DY  
* @author treeroot {#`O'F>  
* @since 2006-2-2 Y8v13"P6  
* @version 1.0 f |%II,!3  
*/ I-Q@v`  
public class SortUtil { ZNDn! Sj  
public final static int INSERT = 1; +}VaQ8ti4  
public final static int BUBBLE = 2; _ ck)yY?7  
public final static int SELECTION = 3; 11VtC)  
public final static int SHELL = 4; b!p]\B!  
public final static int QUICK = 5; ,ArHS  
public final static int IMPROVED_QUICK = 6; qPQ6`rD\  
public final static int MERGE = 7; Nwwn #+  
public final static int IMPROVED_MERGE = 8; %cO^:  
public final static int HEAP = 9; 7F5v-/  
)d~{gPr.  
public static void sort(int[] data) { )2sE9G,  
sort(data, IMPROVED_QUICK); S2i*Li  
} Xfc+0$U@  
private static String[] name={ Y-?0!a=e.  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |E?PQ?P  
}; W{RZ@ 3ZY  
HOaNhJ{7D  
private static Sort[] impl=new Sort[]{ g ?.y7!m  
new InsertSort(), ]SC|%B_*  
new BubbleSort(), LUs)"ZAi|  
new SelectionSort(), /9pN.E  
new ShellSort(), mO=A50_&,Q  
new QuickSort(), O*7vmPy  
new ImprovedQuickSort(), m>{a<N  
new MergeSort(), -=cxUDB  
new ImprovedMergeSort(), NiH =T  
new HeapSort() ~] &yHzp2  
}; lfw|Q@  
0Ra%>e(I^  
public static String toString(int algorithm){ CM%Rz-c  
return name[algorithm-1]; ]4ib^R~Z  
} 5^ck$af  
38GkV.e}$  
public static void sort(int[] data, int algorithm) { m]+~F_/  
impl[algorithm-1].sort(data); K'Y/0:"*  
} N_^PoX935O  
["fUSQ  
public static interface Sort { tVv/G ~(  
public void sort(int[] data); G! Y l0Zr  
} ,&~-Sq) ~  
,<=gPs;x  
public static void swap(int[] data, int i, int j) { )2 lB  
int temp = data; $l $p|  
data = data[j]; W:maE9E=  
data[j] = temp; ^sKdN-{  
} AQ&vq$  
} s\zY^(v4  
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