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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。 /#,3JU$w  
插入排序: x`#|8  
Lk-%I?  
package org.rut.util.algorithm.support; {ta0dS;1  
j+>#.22+  
import org.rut.util.algorithm.SortUtil; sMikTwR/^  
/** O73 /2=1V  
* @author treeroot c T!L+z g  
* @since 2006-2-2 S24wv2Uw i  
* @version 1.0 j$K[QSn  
*/ -q-/0d<l  
public class InsertSort implements SortUtil.Sort{ 27NhYDo  
N{$'-[  
/* (non-Javadoc) 5*d  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X@[)jWs  
*/ Jrkj foN  
public void sort(int[] data) { $m:4'r  
int temp; D<m+M@u  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); D=Pv:)*]  
} a V4p0s6ZZ  
} (xJZeY)-b^  
} L,XWX8  
jb~/>I^1  
} P2+Z^J`Y>  
A?q9(n|A"  
冒泡排序: +gQn,HX  
+cw;a]o^>  
package org.rut.util.algorithm.support; )/hb9+S  
}5)sS}C  
import org.rut.util.algorithm.SortUtil; onuhNn_=>  
o~*5FN}%+l  
/** 'Si 1r%'m#  
* @author treeroot :.+?v*%;n  
* @since 2006-2-2 aFj)s?$4]K  
* @version 1.0 'kD~tpZ  
*/ #jja#PF]7  
public class BubbleSort implements SortUtil.Sort{ O-M4NKl]6  
\(C_t1  
/* (non-Javadoc) Uv-xP(X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) osJ;"B36  
*/ r`THOj\cM  
public void sort(int[] data) { JERWz~n}  
int temp; 3']yjj(gHr  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ^r7-|  
if(data[j] SortUtil.swap(data,j,j-1); J:YFy-[w(  
} 5 E%dF9q  
} |Ki\Q3O1  
} l1|z; $_z  
} }wJDHgt]-p  
-n-rKN.T  
} ;!CYp; _  
ydNcbF%K  
选择排序: ;(kU:b|j  
l+>&-lX'  
package org.rut.util.algorithm.support; ;plzJ6>  
I.<>6ISI@  
import org.rut.util.algorithm.SortUtil; 0#}@- e  
6E!CxXUX  
/** Q &Rj)1!  
* @author treeroot Daa2.*  
* @since 2006-2-2 mxYsP6&  
* @version 1.0 O^D$ ~ ]  
*/ 7DU"QeLeb  
public class SelectionSort implements SortUtil.Sort { qq&G~y  
rf%E+bh4  
/* ,Z7tpFC  
* (non-Javadoc) ?s<'3I{F`  
* dnby&-+T  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BVx: JiA  
*/ %C]K`=vI-  
public void sort(int[] data) { .Q pqbp 8  
int temp; HqW|  
for (int i = 0; i < data.length; i++) { kQR kby  
int lowIndex = i; X^PR];V:$  
for (int j = data.length - 1; j > i; j--) { 0;Y|Ua[G+~  
if (data[j] < data[lowIndex]) { N{]|!#  
lowIndex = j; 4JTFdbx  
} n')#]g0[  
} qp-/S^%  
SortUtil.swap(data,i,lowIndex); $lj1924?^  
} *3hqz<p4:  
} 3f`+ -&|M  
UGy~Ecv  
} vG'JMzAm  
g+ik`q(ge  
Shell排序: y[*Bw)F\N  
zS*X9|p  
package org.rut.util.algorithm.support; Z#wmEc.}C  
FDB^JH9d  
import org.rut.util.algorithm.SortUtil; 5Pis0fa  
]_S&8F}|  
/** =o5ZcC  
* @author treeroot -Bqn^ E  
* @since 2006-2-2 ~;Ga65_6_  
* @version 1.0 aDx{Q&  
*/ H)$-T1Wx4  
public class ShellSort implements SortUtil.Sort{ Rx$5#K!%M  
,zy4+GW  
/* (non-Javadoc) N#')Qz:P  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Go}C{(4T  
*/ I$4GM  
public void sort(int[] data) { _LV;q! /j  
for(int i=data.length/2;i>2;i/=2){ ;4E0%@R  
for(int j=0;j insertSort(data,j,i); $/%|0tQ  
} 2\ /(!n  
} fiSc\C~  
insertSort(data,0,1); C3af>L@}  
} =GpO }t">  
a;eV&~  
/** Kc=&jCn  
* @param data tVUoUl  
* @param j .y{qsL^P  
* @param i fbKL31PI  
*/ FO{K=9O  
private void insertSort(int[] data, int start, int inc) { Be{7Rj v  
int temp; OLc/Vij;  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); @|xcrEnP}B  
} qlJP2Ig~  
} 3F ;+ D  
} (5%OAjW  
&N!QKrj3  
} 317Lv \[  
vcsi @!   
快速排序: 00'R1q4  
C+-xC~  
package org.rut.util.algorithm.support; 8$3G c"=  
m'$]lf;*  
import org.rut.util.algorithm.SortUtil; *<2+tI  
vLW&/YJ6  
/** Zqke8q  
* @author treeroot :qi"I;=6  
* @since 2006-2-2 D +/27#  
* @version 1.0 tY<D\T   
*/ rrei6$H&  
public class QuickSort implements SortUtil.Sort{ F4i c^F{K  
4r!8_$fN?G  
/* (non-Javadoc) ]3<k>?  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <qs>c<Vj  
*/ =$UDa`}D  
public void sort(int[] data) { Kw}-<y  
quickSort(data,0,data.length-1); 4,kT4_&,  
} Z |uII#lq  
private void quickSort(int[] data,int i,int j){ 'G3B02*  
int pivotIndex=(i+j)/2; )/h~csy:~  
file://swap $D8eCjUm  
SortUtil.swap(data,pivotIndex,j); \D] N*  
s5>=!yX  
int k=partition(data,i-1,j,data[j]); -.: [a3c?  
SortUtil.swap(data,k,j); ;"=a-$vm  
if((k-i)>1) quickSort(data,i,k-1); ,Y EB?HA  
if((j-k)>1) quickSort(data,k+1,j); +1Oi-$ 2-  
?<\ K!dA  
} $VYMAk&\  
/** /GNLZm^  
* @param data <;:M:{RZY  
* @param i X62h7?'Pd  
* @param j 'u$e2^  
* @return s4bLL  
*/ [)|P-x-<  
private int partition(int[] data, int l, int r,int pivot) { |a#4  
do{ QT/TZ:  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ++-\^'&1  
SortUtil.swap(data,l,r); 0n+Wv @/  
} U@dztX@u  
while(l SortUtil.swap(data,l,r); r# 5))q-  
return l; O:3pp8  
} Y9ueE+6  
LD5n_W  
} LUv>0G#L[  
pPm[<^\#S  
改进后的快速排序: dL'hC#!h  
/w{DyHT  
package org.rut.util.algorithm.support; #r; ' AG  
.w^M?}dx  
import org.rut.util.algorithm.SortUtil; /u{ 9UR[g  
 L3P_  
/** A.m#wY8  
* @author treeroot .4A4\-Cqe  
* @since 2006-2-2 Ub%+8 M  
* @version 1.0 XX",&cp02V  
*/ Wq8Uq}~_g  
public class ImprovedQuickSort implements SortUtil.Sort { t0p^0   
<#JJS}TLk  
private static int MAX_STACK_SIZE=4096; DoAK]zyJA  
private static int THRESHOLD=10; MCU{@ \?Xf  
/* (non-Javadoc) wxEFM)zr  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9:CJl6~N)#  
*/ |i5A F\w  
public void sort(int[] data) { l@nkR&4[  
int[] stack=new int[MAX_STACK_SIZE];  Ok[y3S  
e&?o  
int top=-1; P9v N5|"M  
int pivot; N7k<q=r-  
int pivotIndex,l,r; *xXa4HB  
y% =nhV  
stack[++top]=0; nY"9"R\.=  
stack[++top]=data.length-1; rxjMCMF  
^Afq)26D  
while(top>0){ ufm`h)N  
int j=stack[top--]; $+)2CXQe5  
int i=stack[top--]; ;|e{J$  
]kx)/n-K  
pivotIndex=(i+j)/2; jftoqK- p  
pivot=data[pivotIndex]; )e|Cd} 2  
4UmTA_& Io  
SortUtil.swap(data,pivotIndex,j); ;LNFPo   
Ath^UKO"  
file://partition gUzCDB^.:  
l=i-1; qlmz@kTb  
r=j; pXPwn(  
do{ J6/Mm7R  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); #bgW{&_ y  
SortUtil.swap(data,l,r); vU LlAQG  
} IwhZzw w  
while(l SortUtil.swap(data,l,r); "*|plB  
SortUtil.swap(data,l,j); w35r\x +  
8=OK8UaU  
if((l-i)>THRESHOLD){ &Al9%W  
stack[++top]=i; pUki!TA  
stack[++top]=l-1; JS% &ipm  
} kVE% "  
if((j-l)>THRESHOLD){ ww82)m8  
stack[++top]=l+1; B) J.(k`p  
stack[++top]=j; |ZW%+AQ|  
} cZT;VmC  
1ux~dP  
} /\*,|y\<  
file://new InsertSort().sort(data); z|[#6X6tT  
insertSort(data); x&7% U  
} LS@[O])$'  
/** f~-81ctu  
* @param data IO~d.Ra  
*/ VQV7W  
private void insertSort(int[] data) { }C.M4{a\  
int temp; p"f=[awp  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); WJCEiH  
} $Z(fPKRN/  
} Fv=7~6~  
} bs$x%CR  
SHS:>V  
} o B;EP  
eW#U<x%P  
归并排序: awN{F6@ZE  
XbdoTriE  
package org.rut.util.algorithm.support; |9ro&KA  
3 G/#OJ  
import org.rut.util.algorithm.SortUtil; DG}YQr.L  
J"'2zg1&  
/** ~(kIr? ^  
* @author treeroot ;xaOve;9  
* @since 2006-2-2 [vb>5EhL!  
* @version 1.0 {ve86 POY  
*/ L8n1p5 gx3  
public class MergeSort implements SortUtil.Sort{ 9H:5XR  
 ZeD;  
/* (non-Javadoc) i|+ EC_^<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wP3_RA]z  
*/ g9(zJ  
public void sort(int[] data) { 4Z>hP]7  
int[] temp=new int[data.length]; q/ -8sO}q  
mergeSort(data,temp,0,data.length-1); |j53' >N[  
} -Qx:-,.a  
50% |9D0?Y  
private void mergeSort(int[] data,int[] temp,int l,int r){ !U.Xb6  
int mid=(l+r)/2; =0 W`tx  
if(l==r) return ; ?n)r1m  
mergeSort(data,temp,l,mid); xxOo8+kA  
mergeSort(data,temp,mid+1,r); `"QUA G  
for(int i=l;i<=r;i++){ g{w IdV  
temp=data; ;V]EF  
} bUbM}  
int i1=l; .CH0P K=l  
int i2=mid+1; ;K38I}  
for(int cur=l;cur<=r;cur++){ IQ[ ?ej3W  
if(i1==mid+1) ZK<kn8JJ  
data[cur]=temp[i2++]; d (]t}  
else if(i2>r) un0t zz  
data[cur]=temp[i1++]; }Zu2GU$6  
else if(temp[i1] data[cur]=temp[i1++]; ]X~;?>#:p  
else E15"AO  
data[cur]=temp[i2++]; %\PnsnJ9Q  
} .QOQqU*2I  
} :"? boA#L  
(UmoG  
} GczGW4\P'  
U*F|Z4{W  
改进后的归并排序: MN\/F4Io  
g/,fjM_  
package org.rut.util.algorithm.support; JG&`l{c9  
*u.6,jw  
import org.rut.util.algorithm.SortUtil; Wh[+cH"M  
OQ"%(w>Hb  
/** Z0T{1YEJ  
* @author treeroot Cd)e_&  
* @since 2006-2-2 Et~b^8$>  
* @version 1.0 mN3}wJ}J  
*/ f 'aQ T  
public class ImprovedMergeSort implements SortUtil.Sort { ']^e,9=Q  
G|FF  
private static final int THRESHOLD = 10; ' 8`{u[:  
I$0JAy  
/* 7 y}b (q=  
* (non-Javadoc) k+S+ : 5  
* 2%\Nq:; T  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jhu<^pjs  
*/ _l]`Og@Y  
public void sort(int[] data) { pj>b6^TI6C  
int[] temp=new int[data.length]; 'Ht$LqG  
mergeSort(data,temp,0,data.length-1); dgPJte%i  
} ]4SnOSV?S  
F^b C!;~x  
private void mergeSort(int[] data, int[] temp, int l, int r) { {V%ZOdg9  
int i, j, k; Ib.`2@ o&  
int mid = (l + r) / 2; Im%|9g;P  
if (l == r) Zzr+p.  
return; n m(yFX?=  
if ((mid - l) >= THRESHOLD) f" Yj'`6  
mergeSort(data, temp, l, mid); jfF,:(P%W  
else +:1ay^YI  
insertSort(data, l, mid - l + 1); ~a m]G0  
if ((r - mid) > THRESHOLD) 2pFOC;tl  
mergeSort(data, temp, mid + 1, r); c/ %5IhX?  
else 7r?O(0>  
insertSort(data, mid + 1, r - mid); K0 .f4 o  
LB%_FT5  
for (i = l; i <= mid; i++) { K6=-Zf  
temp = data; |Axg}Q|  
} J'^s5hxn+0  
for (j = 1; j <= r - mid; j++) { 5} |O  
temp[r - j + 1] = data[j + mid]; 2{c ;ELq  
} %~P]x7%|  
int a = temp[l]; >|SB]'C|  
int b = temp[r]; 2#&9qGR  
for (i = l, j = r, k = l; k <= r; k++) { hABC rd Em  
if (a < b) { jzV*V<  
data[k] = temp[i++]; !3Fj`Oh  
a = temp; "{;]T  
} else { AWC zu5ve  
data[k] = temp[j--]; ^T"9ZBkb  
b = temp[j]; uHBX}WH  
} xjOy3_Js  
} bT-(lIU  
} J]ivIQ  
|#R;pEn  
/** DrbjqQL+.  
* @param data 'dM &~L SQ  
* @param l D.)$\Caq  
* @param i a*&P>Lwe7&  
*/ Q_/{TE/sO5  
private void insertSort(int[] data, int start, int len) { *2crhI*@>  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >JS\H6  
} {y<[1Pms  
} L5%~H?K(  
} >`= '~y8  
} FOpOS?Cr'  
%*OKhrM  
堆排序: E*IkI))X0  
Vi`+2%4  
package org.rut.util.algorithm.support; gwQL9 UYx  
lJoMJS;S]}  
import org.rut.util.algorithm.SortUtil; H? N!F7s  
]7zDdI|  
/** &q1(v3cOO  
* @author treeroot cRz7.9-<  
* @since 2006-2-2 5R4h9D5  
* @version 1.0 $=iz&{9  
*/ UV)[a%/SB&  
public class HeapSort implements SortUtil.Sort{ =Y|TShKk  
U6FM`w<  
/* (non-Javadoc) xXH%7%W'f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C]*9:lK  
*/ l W'6rat  
public void sort(int[] data) { (Z.K3  
MaxHeap h=new MaxHeap(); K]zBPfx  
h.init(data); ^mFuZ~g;?  
for(int i=0;i h.remove(); NAV}q<@v  
System.arraycopy(h.queue,1,data,0,data.length); ?PiJ7|  
} VZYd CZ&l7  
E5 H6&XU  
private static class MaxHeap{  <VB  
'mpY2|]\$  
void init(int[] data){ h+zJ"\  
this.queue=new int[data.length+1]; s`Z(f:/6*  
for(int i=0;i queue[++size]=data; Yg/e8Q2  
fixUp(size); S4s\tA<  
} EiI3$y3;  
} td q;D  
,!kqEIp%  
private int size=0; nlH H}K  
jnt0,y A  
private int[] queue; X1:|   
UBpYR> <\  
public int get() { Rg<y8~|'}  
return queue[1]; A)040n  
} e+bpbyV_#  
dTyTj|"x{  
public void remove() { (rt DT  
SortUtil.swap(queue,1,size--); Um;ReJ8z  
fixDown(1); sq*R)cZ  
} U/yYQZ\)  
file://fixdown 56u'XMB?  
private void fixDown(int k) { ckP&N:tC  
int j; ko im@B  
while ((j = k << 1) <= size) { 1 dz&J\|E#  
if (j < size %26amp;%26amp; queue[j] j++; /-E>5wU  
if (queue[k]>queue[j]) file://不用交换 tb AN{pX  
break; ~zRUJ2hD!  
SortUtil.swap(queue,j,k); PmvTCfsg  
k = j; ho#] ?Z#  
} B^U5= L[:p  
} Ha$|9li`  
private void fixUp(int k) { ?ZdHuuDN~  
while (k > 1) { f!P.=Qo[=  
int j = k >> 1; "My \&0-  
if (queue[j]>queue[k]) ,V)yOLApVj  
break; vkE6e6,Qc  
SortUtil.swap(queue,j,k); "<3PyW?zt  
k = j; ^O#,%>1J  
} y2\, L  
} T9{94Ra  
gO<>L0,j  
} 6aCAz2 /  
P_hwa1~d  
} {#=q[jVi%1  
%whPTc0P  
SortUtil: X )fj&  
ub}t3#  
package org.rut.util.algorithm; ^ft_1d[  
V.'EP  
import org.rut.util.algorithm.support.BubbleSort; =4 &9!Z  
import org.rut.util.algorithm.support.HeapSort; *`ji2+4Sjw  
import org.rut.util.algorithm.support.ImprovedMergeSort; /4w&! $M-  
import org.rut.util.algorithm.support.ImprovedQuickSort; {qx}f^WV  
import org.rut.util.algorithm.support.InsertSort; +q) ^pCC  
import org.rut.util.algorithm.support.MergeSort; (BMFGyE3  
import org.rut.util.algorithm.support.QuickSort; cliP+#  
import org.rut.util.algorithm.support.SelectionSort; n1DD+@  
import org.rut.util.algorithm.support.ShellSort; jFw?Ky2  
nE Qw6q~je  
/** :uZcN  
* @author treeroot HkJ$r<J2  
* @since 2006-2-2 .2!'6;K  
* @version 1.0 /V46:`V  
*/ cc.z C3Hs3  
public class SortUtil { m]=|%a6  
public final static int INSERT = 1; vhTte |(  
public final static int BUBBLE = 2; 6T"[M  
public final static int SELECTION = 3; cQu1WgQ G  
public final static int SHELL = 4; a[xEN7L~4D  
public final static int QUICK = 5; YX18!OhQ  
public final static int IMPROVED_QUICK = 6; v)d\ 5#7  
public final static int MERGE = 7; ,S:g 5n>M  
public final static int IMPROVED_MERGE = 8; Jmf&&)p  
public final static int HEAP = 9; ~k+-))pf  
[#)-F_S  
public static void sort(int[] data) { |6"zIHvtc  
sort(data, IMPROVED_QUICK); D"bLJ j/!  
} DWHl,w;[z`  
private static String[] name={ /=lrdp!a  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;,JCA# N  
}; _&.CI6  
8> T '  
private static Sort[] impl=new Sort[]{ t 4{{5U'\  
new InsertSort(), i~ n>dc YW  
new BubbleSort(), u <%,Ql  
new SelectionSort(), d.% Vm&3  
new ShellSort(), hi*\5(uH  
new QuickSort(), rQ;m|@  
new ImprovedQuickSort(), cDxjD5E  
new MergeSort(),  PZf^r  
new ImprovedMergeSort(), jToA"udW/  
new HeapSort() (lwkg8WC  
}; -1:yqF.x  
$vTU|o>|  
public static String toString(int algorithm){ Pd%o6~_*  
return name[algorithm-1]; hR[Qdu6r  
} Q^DKKp  
%S]5wR6;_  
public static void sort(int[] data, int algorithm) { f<!eJO:<'  
impl[algorithm-1].sort(data); zRD{"uqi  
}  z4&|~-m,  
(JL{X`gs#  
public static interface Sort { ;5q=/  
public void sort(int[] data); 6S2D\Bt,_  
} *'QD!Tc  
@Ej{sC!0T  
public static void swap(int[] data, int i, int j) { z./u;/:  
int temp = data; #Ji&.T^U/  
data = data[j]; F[l{pc "C  
data[j] = temp; SH<Nt[8C  
} #QXB2x<*  
} +K; X$kB  
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