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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。 ;~2RWj=-  
插入排序: [+q':T1W-  
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package org.rut.util.algorithm.support; f:=y)+@1My  
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import org.rut.util.algorithm.SortUtil; (.:!_OB0N  
/** O e-FI+7  
* @author treeroot 7B|ddi7Q>  
* @since 2006-2-2 U^ec g{  
* @version 1.0 ,:Q+>h  
*/ sNet[y:O3  
public class InsertSort implements SortUtil.Sort{ J<<Ph  
L=ala1{O  
/* (non-Javadoc) kb27$4mm  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $rb #k{  
*/ xXCSaBS~  
public void sort(int[] data) { :r{;'[38  
int temp; GkhaB(btk'  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ^9{mjy0Q  
} ^F>C|FJ2  
} HI` q!LPv  
} 3rF=u:r7c  
!,}F2z?4c  
} CSUXa8u7  
ypCarvQT  
冒泡排序: P)>`^wc$  
IfK%i/J  
package org.rut.util.algorithm.support; ({GN.pC(  
qqmhh_[T  
import org.rut.util.algorithm.SortUtil; G,VTFM6  
u9TiEEof3  
/** <"93  
* @author treeroot \c"{V-#o\  
* @since 2006-2-2 IfeCSK,x  
* @version 1.0 -v '|#q  
*/ $P9'"a)Lm  
public class BubbleSort implements SortUtil.Sort{ yX^/Oc@j  
Rh[%UNl  
/* (non-Javadoc) _y,? Cj=u|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s/;iZiWK  
*/ 8f\sG:$  
public void sort(int[] data) { X9J&OQ  
int temp; c v .R`)l  
for(int i=0;i for(int j=data.length-1;j>i;j--){ *A2D}X3s  
if(data[j] SortUtil.swap(data,j,j-1); (1t b  
} -HE@wda  
} b5-WK;  
} -^Pn4y]A)  
} VZ#@7t  
%Sgdhgk1  
} !\)9fOLs  
9Y6Ear .W  
选择排序: ?89K [D|  
TVkC pO,H  
package org.rut.util.algorithm.support; l*v6U'J  
F%Xj'=  
import org.rut.util.algorithm.SortUtil; 7a,/DI2o  
Y-0o>:SM  
/** ]vFtByqn  
* @author treeroot Sk ~( t  
* @since 2006-2-2 0Gq}x;8H&  
* @version 1.0 'b?Px}  
*/ j>OuNeo@4  
public class SelectionSort implements SortUtil.Sort { i`FskEoijq  
4Ou|4WjnL  
/* 0R#T3K}  
* (non-Javadoc) I;Sg 9`k=  
* cZ<@1I5QK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D2060ze  
*/ F2B9Q_>P  
public void sort(int[] data) { g RX`61  
int temp; 1x"S^j   
for (int i = 0; i < data.length; i++) { I6q]bQ="  
int lowIndex = i; (jV_L 1D  
for (int j = data.length - 1; j > i; j--) { "@!B"'xg  
if (data[j] < data[lowIndex]) { o 0-3[W'x<  
lowIndex = j; Cwb }$=p'  
} )kBN]>&R  
} {JJq/[j  
SortUtil.swap(data,i,lowIndex); -Um|:[*I  
} \Q CH.~]  
} <b5J"i&m  
?3I93Bt7  
} F!LVyY"w  
8 2EH'C  
Shell排序: l]bCt b%_  
ogOUrJ}P  
package org.rut.util.algorithm.support; QSaJb?I  
wDL dmrB  
import org.rut.util.algorithm.SortUtil; <9BM%  
j06Xz\c  
/** B%.XWW$  
* @author treeroot I^CKq?V?:  
* @since 2006-2-2 K+`$*vS~ws  
* @version 1.0 gz,x6mnQ  
*/ ~> xVhd  
public class ShellSort implements SortUtil.Sort{ !oJ226>WI  
^GyGh{@,f  
/* (non-Javadoc) Ah_T tj  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) " ,qcqG(  
*/ na%DF@Rt#  
public void sort(int[] data) { !6yyX}%o  
for(int i=data.length/2;i>2;i/=2){ r8k.I4  
for(int j=0;j insertSort(data,j,i); qv+8wJ((  
} Q#,j,h  
} "#3p=}]  
insertSort(data,0,1); ,{pC1A@s  
} 4!I;U>b b  
wG, "ZN  
/** S~Z`?qHWh  
* @param data jRCf!RO  
* @param j tH}$j  
* @param i _:ORu Vk  
*/ !,I530eh7  
private void insertSort(int[] data, int start, int inc) { aDae0$lc.S  
int temp; P ]prrKZe,  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); GWQ_X9+q  
} zRz7*o&l  
} #?V7kds]  
} `H^?jX>7  
hv6w=?7  
} 8.g (&F  
ql +tqgo  
快速排序: +1R qo  
uia[>&2  
package org.rut.util.algorithm.support; 3hPj;-u  
Zl:Z31  
import org.rut.util.algorithm.SortUtil; }gfs  
~@v<B I  
/** y5v}EX`m&  
* @author treeroot MgP6ki1z  
* @since 2006-2-2 w<4,;FFlZ/  
* @version 1.0 Gx$rk<;ZW  
*/ oD0N<Ln}  
public class QuickSort implements SortUtil.Sort{ !Q0aKkMfL  
'(qVA>S  
/* (non-Javadoc) ,o_Ur.UJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Py3Y*YP  
*/ 0VA$ Ige  
public void sort(int[] data) { 4;_<CB  
quickSort(data,0,data.length-1); o|FY-+  
} IhRYV`:  
private void quickSort(int[] data,int i,int j){ RyJN=;5p  
int pivotIndex=(i+j)/2; [xrM){ItW  
file://swap fV\ eksBF  
SortUtil.swap(data,pivotIndex,j); L, k\`9bQ  
gLH#UwfJ  
int k=partition(data,i-1,j,data[j]); qXb{A*J  
SortUtil.swap(data,k,j); HoFFce7o  
if((k-i)>1) quickSort(data,i,k-1); 8%Wg;:DZx  
if((j-k)>1) quickSort(data,k+1,j); ;`TSu5/  
3 E~d  
} 3XOf-v:~  
/** 4Y=sTXbFt  
* @param data l$:.bwXXO  
* @param i h /.^iT  
* @param j 5z$>M3  
* @return %U4w@jp  
*/ Ga%x(1U[&  
private int partition(int[] data, int l, int r,int pivot) { 7n_'2qY  
do{ ZgXn8O[a  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); YTtuR`  
SortUtil.swap(data,l,r); Ao%;!(\I%  
} `2j \(N,  
while(l SortUtil.swap(data,l,r); RyxEZ7dC<y  
return l; ~MgU"P>  
} e/h2E dY  
H/eyc`  
} bay7%[BLB  
f\Fk+)e@  
改进后的快速排序: !.(%"  
)RQX1("O  
package org.rut.util.algorithm.support; EK-Qa<[|  
W/U_:^[-  
import org.rut.util.algorithm.SortUtil; +Y:L4`  
[q MFLY$  
/** :*{>=BD  
* @author treeroot o`!7 ~n  
* @since 2006-2-2 Tt0:rQ.  
* @version 1.0 |&>!"27;w  
*/ * MJl(  
public class ImprovedQuickSort implements SortUtil.Sort { @k~_ w#  
}iK_7g`yKa  
private static int MAX_STACK_SIZE=4096; pxF<L\L?:  
private static int THRESHOLD=10; E8:4Z$|c  
/* (non-Javadoc) }-e  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~[|zf*ZISG  
*/ VHyP@JB  
public void sort(int[] data) { G?y'<+Awt  
int[] stack=new int[MAX_STACK_SIZE]; =t+{ )d.w  
pO~VI$7  
int top=-1; ^aW?0qsH  
int pivot; .Fz5K&E=  
int pivotIndex,l,r; ice7J2r_  
K}]0<\N  
stack[++top]=0; zW@OSKq4  
stack[++top]=data.length-1; 6Wos6_  
\n @S.Y?P  
while(top>0){ K-xmLEu  
int j=stack[top--]; e|L$e0  
int i=stack[top--]; X@ljZ  
t;R drk  
pivotIndex=(i+j)/2; =uYz4IDB  
pivot=data[pivotIndex]; 4-?'gN_  
~vCfMV[F  
SortUtil.swap(data,pivotIndex,j); S[TJ{ L(  
`f@VX :aL}  
file://partition f[@M  
l=i-1; j'?^<4i  
r=j; +!(W>4F  
do{ )6S;w7  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); `VT0wAe2;  
SortUtil.swap(data,l,r); !`BK%m\8  
} +Oae3VFf;  
while(l SortUtil.swap(data,l,r); >gt_C'  
SortUtil.swap(data,l,j);  9"@P.8_  
jJpSn[{  
if((l-i)>THRESHOLD){ r "^ {?0  
stack[++top]=i; %HRFH  
stack[++top]=l-1; >PsP y.  
} 3wS{@'  
if((j-l)>THRESHOLD){ doCWJ   
stack[++top]=l+1; kXj%thDx  
stack[++top]=j; M!=WBw8Y]a  
} JJvf!]  
s$ ONht  
} 4{'0-7}  
file://new InsertSort().sort(data); ^ ExA  
insertSort(data); [\hk_(}  
} q4k)E  
/** ]~,V(K  
* @param data mErXdb|L  
*/ u5f+%!p  
private void insertSort(int[] data) { ~urV`J  
int temp; :'OCQ.[{s  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); J,s)Fu\j@  
} =5P_xQx  
} h_ ^,|@C "  
} +[ _)i9a  
8F$b/Z  
} !;SpQ28  
WC!bB  
归并排序: ~3 {C &c  
\ B~9Ue!  
package org.rut.util.algorithm.support; CfMq?.4%E}  
Nk-biD/J  
import org.rut.util.algorithm.SortUtil; mx#H+:}&r  
x8a?I T.  
/** \WM*2&  
* @author treeroot #5?Q{ORN o  
* @since 2006-2-2 Ozk^B{{o  
* @version 1.0 o6pnTu  
*/ ~Od4( }/G  
public class MergeSort implements SortUtil.Sort{ Sx,O)  
K_V44f1f  
/* (non-Javadoc) @jW_ r j:<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i<g|+}I  
*/ (89NK]2x  
public void sort(int[] data) { o7feH 6Sh  
int[] temp=new int[data.length]; (}Ql#q K  
mergeSort(data,temp,0,data.length-1); U*Z P>Vv  
} t)o #!)|  
YyX/:1 sg>  
private void mergeSort(int[] data,int[] temp,int l,int r){ \TG!M]D:  
int mid=(l+r)/2; n:?fv=9n  
if(l==r) return ; eNlE]W,=  
mergeSort(data,temp,l,mid); xMsos?5}  
mergeSort(data,temp,mid+1,r); yQ4]LyS  
for(int i=l;i<=r;i++){ K\&A}R  
temp=data; {xw*H<"f<  
} S;$@?vF  
int i1=l; 9.| +KIRb  
int i2=mid+1; d"nz/$  
for(int cur=l;cur<=r;cur++){ 47_4`rzy;  
if(i1==mid+1) ?~rF3M.=|  
data[cur]=temp[i2++]; 9l+`O0.@  
else if(i2>r) QD LXfl/  
data[cur]=temp[i1++]; d\`A ^  
else if(temp[i1] data[cur]=temp[i1++]; 0lNVQxG  
else &nk6_{6 c  
data[cur]=temp[i2++]; B$k<F8!%  
} 8<$6ufvOv  
} &\][:kG;  
\5^#5_<  
} 9&}`.Py  
5y! 4ny _  
改进后的归并排序: d"+zDc;  
/)SwQgK#  
package org.rut.util.algorithm.support; b=a&!r5M  
r)<]W@ Pr  
import org.rut.util.algorithm.SortUtil; DCb\ =E  
tRYMK+  
/** >9W ;u`  
* @author treeroot =:a H2T*  
* @since 2006-2-2 eL9 RrSXz  
* @version 1.0 Q3#- q> ;7  
*/ lTPo2-j/eK  
public class ImprovedMergeSort implements SortUtil.Sort { PY: l  
"U34D1I )#  
private static final int THRESHOLD = 10; i^(_Gk  
;C%40;Q  
/* wKhuUZj{  
* (non-Javadoc) 4KE"r F  
* SU"-%}~O#,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SN|EWe^  
*/ (yE?)s  
public void sort(int[] data) { XOO!jnQu  
int[] temp=new int[data.length]; vm)&WEL!  
mergeSort(data,temp,0,data.length-1); ?eT^gWX  
} ]#N2:ych  
9|T%q2O  
private void mergeSort(int[] data, int[] temp, int l, int r) { nM  D^x  
int i, j, k; :W,6zv(..u  
int mid = (l + r) / 2; q{ov62t`  
if (l == r) {*H&NI  
return; @L^2VVWk^  
if ((mid - l) >= THRESHOLD) ^Sx 0t  
mergeSort(data, temp, l, mid); CU 2;m\Hc  
else %'j)~  
insertSort(data, l, mid - l + 1); 6\)61o_1|  
if ((r - mid) > THRESHOLD) zF%CFqQ  
mergeSort(data, temp, mid + 1, r); c&2ZjM  
else / Dj6Bj }  
insertSort(data, mid + 1, r - mid); /hf}f=7kH  
@(PYeXdV6&  
for (i = l; i <= mid; i++) { I,vy__ sZ  
temp = data; 7/NXb  
} oK@!yYv  
for (j = 1; j <= r - mid; j++) { AJSe +1  
temp[r - j + 1] = data[j + mid]; Lm\N`  
} .ps'{rl8  
int a = temp[l]; au2 ieZZ[  
int b = temp[r]; ; A~S){  
for (i = l, j = r, k = l; k <= r; k++) { T%K(opISc(  
if (a < b) { XJsHy_6  
data[k] = temp[i++]; i$)bZr\  
a = temp; =,KRZqz  
} else {  L5""  
data[k] = temp[j--]; Kxz<f>`b/  
b = temp[j]; }% JLwN  
} +T=Z!2L  
} Z}.N4 /  
} ,"  
|$#u~<r_ w  
/** Ol:&cX3G  
* @param data KDgJ~T  
* @param l F{ J>=TC  
* @param i Wm4@+ }  
*/ -Ep cX!i  
private void insertSort(int[] data, int start, int len) { aM?Xi6 U5  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g5R2a7  
} O5{!CT$  
} p*F&G=ZE  
} vmL% %7  
} "T@9]>6.f  
Jt"0|+g|  
堆排序: !>-cMI6E  
M~w =ZJ@  
package org.rut.util.algorithm.support; %TxFdF{A  
2hAu~#X  
import org.rut.util.algorithm.SortUtil; `h_,I R<  
>>=lh  
/** }N(-e$88  
* @author treeroot UA/Q3)  
* @since 2006-2-2 V0z.w:-  
* @version 1.0 G>&=rmK"  
*/ Y8`4K*58%  
public class HeapSort implements SortUtil.Sort{ k_#ra7zP  
|{+D65R  
/* (non-Javadoc) jDI O,XuF  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $'dJ+@  
*/ :\L{S  
public void sort(int[] data) { Oga0CR_  
MaxHeap h=new MaxHeap(); \v{tK;  
h.init(data); KOGbC`TN<  
for(int i=0;i h.remove(); /J`8Gk59  
System.arraycopy(h.queue,1,data,0,data.length); 5#s?rA%u  
} [sp=nG7i&  
Rv ?G o2  
private static class MaxHeap{ 2Ch!LS:+  
g !w7Yv  
void init(int[] data){ X|t?{.p  
this.queue=new int[data.length+1]; h<\o[n7j  
for(int i=0;i queue[++size]=data; 7g_:Gv~v  
fixUp(size); ?JDZDPVJ)  
} {o< 4 ^  
} aM5zYj`pW  
+[8s9{1{C  
private int size=0; mb~w .~%  
vC[)/w  
private int[] queue; #sdW3m_%  
FiJJe  
public int get() { _,_>B8  
return queue[1]; o0&jel1a  
} "2(lgxhj  
ym:^Y-^iV  
public void remove() { ?dlQE,hB$  
SortUtil.swap(queue,1,size--); y562g`"U  
fixDown(1); Bx0^?>  
} qyGVyi3  
file://fixdown Kf2*|ZHj  
private void fixDown(int k) { dQ@ e+u5  
int j; ~ z*  
while ((j = k << 1) <= size) { >3s9vdUp4h  
if (j < size %26amp;%26amp; queue[j] j++; *5]fjh{  
if (queue[k]>queue[j]) file://不用交换 1u7 5  
break; ZN-J!e"`  
SortUtil.swap(queue,j,k); +"6_rbeuO  
k = j; V;mKJ.d${  
} ;({&C34a  
} D{I^_~-\5  
private void fixUp(int k) { lidzs<W-fW  
while (k > 1) { K2>(C$Z  
int j = k >> 1; 1BwCJ7?8  
if (queue[j]>queue[k]) z"bgtlfb8  
break; iq-n(Rfw~  
SortUtil.swap(queue,j,k); 2-j+-B|i  
k = j; , fFB.q"  
} hc2[,Hju{O  
} %YG ~ql  
GJai!$v  
} )(TaVHJR  
,n TC7V  
} 'm}K$h(U  
db`xlvrCY  
SortUtil: BRYhL|d~.  
5_ -YF~  
package org.rut.util.algorithm; {\j h? P|  
-q|K\>tgU  
import org.rut.util.algorithm.support.BubbleSort; Fx 2 KRxk  
import org.rut.util.algorithm.support.HeapSort; BusD}9QqB  
import org.rut.util.algorithm.support.ImprovedMergeSort; =HmV0  
import org.rut.util.algorithm.support.ImprovedQuickSort; :,%~rR  
import org.rut.util.algorithm.support.InsertSort; 7kx)/Rw\B  
import org.rut.util.algorithm.support.MergeSort; csz/[*  
import org.rut.util.algorithm.support.QuickSort; HGfV2FtTz  
import org.rut.util.algorithm.support.SelectionSort; 0RAmwfXm  
import org.rut.util.algorithm.support.ShellSort; ]]`hnzJX  
]?S\So+  
/** &H$ 3`"p5u  
* @author treeroot c-3AzB#[  
* @since 2006-2-2 )a.Y$![  
* @version 1.0 m619bzFlB  
*/ y[Zl,v7  
public class SortUtil { S-WD?BF C  
public final static int INSERT = 1; 7S LJLn3d  
public final static int BUBBLE = 2; Ac'[(  
public final static int SELECTION = 3; I8@NQ=UV0  
public final static int SHELL = 4; &1YqPk  
public final static int QUICK = 5; *Uie{^p?  
public final static int IMPROVED_QUICK = 6; <:0649ZB  
public final static int MERGE = 7; U:m[* }+<  
public final static int IMPROVED_MERGE = 8; r-v ;A  
public final static int HEAP = 9; wV-1B\m  
0?  (  
public static void sort(int[] data) { WM5 s  
sort(data, IMPROVED_QUICK); Wk"4mq  
} V|KYkEl r1  
private static String[] name={ '; ,DgR;'  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JO\Tf."a\  
}; n3t1'_/TU}  
[H)NkR;I  
private static Sort[] impl=new Sort[]{ v]\io#   
new InsertSort(), eyf\j,xP&  
new BubbleSort(), 0ohpJh61Q  
new SelectionSort(), jnsV'@v8Nj  
new ShellSort(), S.rlF1`  
new QuickSort(), MKLntX  
new ImprovedQuickSort(), $, 4;_4t  
new MergeSort(), E</Um M+ R  
new ImprovedMergeSort(), exrsYo!%  
new HeapSort() \.y|=Ql_u  
}; IJ2]2FI  
{%5k1,/(  
public static String toString(int algorithm){ jm0J)Z_"nr  
return name[algorithm-1]; F%@( $f  
} RX8$&z  
.ii9-+_  
public static void sort(int[] data, int algorithm) { l_GvdD  
impl[algorithm-1].sort(data); dOh'9kk3  
} ] C_g: |q  
#7I,.DUy[  
public static interface Sort { 7yo/ sb9h  
public void sort(int[] data); X5UcemO  
} l:mC'aR  
PhW< )B]  
public static void swap(int[] data, int i, int j) { L9nv05B  
int temp = data; ["|AD,$%  
data = data[j]; Nq6~6Rr  
data[j] = temp; A]" $O&l  
} l{F^"_U  
} WV}<6r$e  
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