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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。 mNvK|bTUT  
插入排序: OfR\8hAY  
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package org.rut.util.algorithm.support; PR&D67:Jy  
l<](8oc. w  
import org.rut.util.algorithm.SortUtil; R/yOy ^<  
/** t;R drk  
* @author treeroot =uYz4IDB  
* @since 2006-2-2 'k9?n)<DW  
* @version 1.0 ~vCfMV[F  
*/ ]wMp`}$b@L  
public class InsertSort implements SortUtil.Sort{ 4HG@moYn@  
f[@M  
/* (non-Javadoc) 0P5!fXs*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9}4EW4  
*/ )6S;w7  
public void sort(int[] data) { "dKYJ&$  
int temp; $J~~.PUXQ  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ~/@5&ajz  
} "! yKX(aTX  
}  9"@P.8_  
} O\5*p=v  
]g>@r.Nc  
} %HRFH  
{(DD~~)D  
冒泡排序: 3wS{@'  
doCWJ   
package org.rut.util.algorithm.support; kXj%thDx  
M!=WBw8Y]a  
import org.rut.util.algorithm.SortUtil; JJvf!]  
s$ ONht  
/** 4{'0-7}  
* @author treeroot ^ ExA  
* @since 2006-2-2 =jik33QV<  
* @version 1.0 q4k)E  
*/ ]~,V(K  
public class BubbleSort implements SortUtil.Sort{ L"i B'=  
u5f+%!p  
/* (non-Javadoc) ~urV`J  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :'OCQ.[{s  
*/ J,s)Fu\j@  
public void sort(int[] data) { =5P_xQx  
int temp; h_ ^,|@C "  
for(int i=0;i for(int j=data.length-1;j>i;j--){ +[ _)i9a  
if(data[j] SortUtil.swap(data,j,j-1); 8F$b/Z  
} !;SpQ28  
} WC!bB  
} *&j)"hX  
} \ B~9Ue!  
zS Yh ?NB5  
} &FWPb#  
_v=@MOI/J  
选择排序: ]Q\Ogfjp  
HQ%-e5Q  
package org.rut.util.algorithm.support; Z\=].[,w4  
;Yrg4/Ipa  
import org.rut.util.algorithm.SortUtil; Mk=;UBb$X  
L3Leb%,!  
/** H=vrF-#  
* @author treeroot DPfP)J:~  
* @since 2006-2-2 nL}bCX{  
* @version 1.0 mT.p-C  
*/ IJ^KYho  
public class SelectionSort implements SortUtil.Sort { <v?9:}  
>4:W:;R  
/* _tR%7%3*  
* (non-Javadoc) (/&IBd-  
* -aiQp@^/J  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G"jKYW  
*/ =&*:)  
public void sort(int[] data) { e`Xy!@`_  
int temp; Sti)YCXH  
for (int i = 0; i < data.length; i++) { XA~Rn>7&H  
int lowIndex = i; <zN  
for (int j = data.length - 1; j > i; j--) { ;lST@>  
if (data[j] < data[lowIndex]) { z_#B 4  
lowIndex = j; uQN8/Gy*J  
} }>JFO:v&  
} @GGzah#  
SortUtil.swap(data,i,lowIndex); 9l+`O0.@  
} a1p:~;f}[  
} DBl.bgf  
0f vQPs!O  
} ,P^pDrc  
 Z*d8b  
Shell排序: 'sJ=h0d_[V  
<^,w,A  
package org.rut.util.algorithm.support; 2}u hPW+  
n4%|F'ma  
import org.rut.util.algorithm.SortUtil; y D.S"  
BRP9j y  
/** p6[a"~y  
* @author treeroot bz_Zk  
* @since 2006-2-2 R@``MC0  
* @version 1.0 ?;.j)  
*/ rt%.IQdY  
public class ShellSort implements SortUtil.Sort{ *b?C%a9  
?H7*?HV  
/* (non-Javadoc) KQ3]'2q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FxSBxz<N-A  
*/ (Q !4\Gy  
public void sort(int[] data) { ]GYO`,  
for(int i=data.length/2;i>2;i/=2){ cA"',N8!5  
for(int j=0;j insertSort(data,j,i); kZ+nL)YQ#  
} ^RG6h  
} : j&M&+  
insertSort(data,0,1); "U34D1I )#  
} }N5>^y  
;C%40;Q  
/** 59";{"sw  
* @param data -zg,pK$+  
* @param j SU"-%}~O#,  
* @param i CGIcuHp  
*/ [7?K9r\#  
private void insertSort(int[] data, int start, int inc) { KyW6[WA9  
int temp; 3%m2$\  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); yk Sn=0  
} 5O&6 (Gaf  
} /-<S FT`  
} zp r`  
<Mo_GTOC!  
} ahkSEE{  
|")}p=   
快速排序: [JFmhLP9  
v$"#9oh  
package org.rut.util.algorithm.support; V\@h<%{^%7  
 IpY  R  
import org.rut.util.algorithm.SortUtil; g^(wZ$NH  
9iWDEk  
/** s;q]:+#7g  
* @author treeroot Nm%&xm  
* @since 2006-2-2 |@={:gRJ{x  
* @version 1.0 -UkP{x)S  
*/ 6%NX|4_  
public class QuickSort implements SortUtil.Sort{ >`p`^:  
DF'-dh</*  
/* (non-Javadoc) $b\`N2J-_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bL (g$Yi  
*/ V'~] b~R  
public void sort(int[] data) { Z{`;Ys:zk  
quickSort(data,0,data.length-1); Mw@T!)(  
} R-J\c+C>W  
private void quickSort(int[] data,int i,int j){ Nh~ Hh(   
int pivotIndex=(i+j)/2; VO>A+vx3M  
file://swap +Y,>ftN  
SortUtil.swap(data,pivotIndex,j); d8Jy$,/`?  
|c,":R  
int k=partition(data,i-1,j,data[j]); STs~GOm-  
SortUtil.swap(data,k,j); JpE4 o2  
if((k-i)>1) quickSort(data,i,k-1); ^ng#J\  
if((j-k)>1) quickSort(data,k+1,j); zcD&xoL\H  
./mh 9ax  
} bT}P":*y  
/** zu<b#Wv  
* @param data bCg {z b#  
* @param i r]?ZXe$;  
* @param j i;c0X+[  
* @return $"C]y$}  
*/ 0 V*Di2  
private int partition(int[] data, int l, int r,int pivot) { -_.)~ )P  
do{ lDO9GNz$  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); #_y#sDfzh  
SortUtil.swap(data,l,r); ]uX'[Z}t  
} q=ZLSBZ  
while(l SortUtil.swap(data,l,r); 2V_C_5)1  
return l; ),0_ C\  
} 8I04Nx  
oAe]/j$  
} +ZtqR  
n(,b$_JK7  
改进后的快速排序: V0z.w:-  
vG O-a2Z  
package org.rut.util.algorithm.support; Y8`4K*58%  
B:)9hF?o@  
import org.rut.util.algorithm.SortUtil; 8AT;9wZqt  
|{+D65R  
/** #9}E@GGs  
* @author treeroot ^kxkP}[Z.  
* @since 2006-2-2 ! lgsV..R  
* @version 1.0 P %f],f  
*/ _ 0%sYkUc  
public class ImprovedQuickSort implements SortUtil.Sort { 5j1}?0v_  
ii0AhQ  
private static int MAX_STACK_SIZE=4096; wxVf6`  
private static int THRESHOLD=10; LU~U>  
/* (non-Javadoc) u_s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6ND,4'6  
*/ Zalgg/.  
public void sort(int[] data) { Kvv&# eO\  
int[] stack=new int[MAX_STACK_SIZE]; ;$l!mv 7  
L=3^A'|  
int top=-1; @26H;  
int pivot; CFAz/x@%  
int pivotIndex,l,r; G+ PBV%gE[  
2]C`S,)  
stack[++top]=0; m `~/]QQ  
stack[++top]=data.length-1; |/C>xunzz  
6c>t|=Ss(  
while(top>0){ 1HL}tG?+#  
int j=stack[top--]; lZZ4 O(  
int i=stack[top--]; Cq;t;qN,nQ  
!=--pb  
pivotIndex=(i+j)/2; GM|gm-t<@  
pivot=data[pivotIndex]; +r *f2\S  
o!^':mll  
SortUtil.swap(data,pivotIndex,j); Lg pj<H[  
G*uy@s:  
file://partition ]R\k@a|G  
l=i-1; L)&?$V  
r=j; 6tB-  
do{ z6S N  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); E.Xf b"]  
SortUtil.swap(data,l,r); EC$wi|i  
} p}_bu@;.Z  
while(l SortUtil.swap(data,l,r); x0@J~ _0  
SortUtil.swap(data,l,j); ZdeRLX  
)Xg,;^  
if((l-i)>THRESHOLD){ H>_ FCV8  
stack[++top]=i; p{xO+Nx1a  
stack[++top]=l-1; tiSN amvG1  
} K2>(C$Z  
if((j-l)>THRESHOLD){ 1BwCJ7?8  
stack[++top]=l+1; _C~e(/=z  
stack[++top]=j; 2;r(?ebw  
} KG6ki_  
&10vdAnBRC  
} Ke,UwYG2~G  
file://new InsertSort().sort(data); o)Kx:l +f  
insertSort(data); \ F#mwl,>"  
} JVf8KHDj  
/** `DIIJ<;g  
* @param data ^-c j=on=Q  
*/ aAiSP+#  
private void insertSort(int[] data) { #P=rP=  
int temp; 7'Y 3T[  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); R8P7JY[h  
} &G7JGar  
} C%t~?jEK~^  
} o $oW-U  
YlwCl4hq  
} |`_qmk[:R  
?Q[uIQ?dV  
归并排序: //]g78]=O  
lHv;C*(_=  
package org.rut.util.algorithm.support; 8hba3L_Z  
4]A2Jl E  
import org.rut.util.algorithm.SortUtil; |8PUmax  
/c'3I  
/** jhrmQS  
* @author treeroot z:-a7_   
* @since 2006-2-2 W_9-JM(r  
* @version 1.0 vt<r_&+ pJ  
*/ W,5A|Q~  
public class MergeSort implements SortUtil.Sort{ U(3+*'8r,1  
/+pbO-rW*  
/* (non-Javadoc) I>o+INb:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d a we!w!  
*/ vpcx 1t<  
public void sort(int[] data) { rM#jxAb  
int[] temp=new int[data.length]; K@Q_q/(%;  
mergeSort(data,temp,0,data.length-1); H_m(7@=  
} ]c]rIOTN  
asb-syqU  
private void mergeSort(int[] data,int[] temp,int l,int r){ *,5V;7OR  
int mid=(l+r)/2; <uDEDb1|l  
if(l==r) return ; w'z ?1M(*  
mergeSort(data,temp,l,mid); #y%bx<A  
mergeSort(data,temp,mid+1,r); Q( .d!CQ>  
for(int i=l;i<=r;i++){ J * $u  
temp=data; CdgZq\  
} 1OK,r`   
int i1=l; <DP_`[+C  
int i2=mid+1; #Mw|h^ Wm  
for(int cur=l;cur<=r;cur++){ {j@ S<PD  
if(i1==mid+1) _" W<>  
data[cur]=temp[i2++]; 8-5MGh0L  
else if(i2>r) NH$%g\GPs  
data[cur]=temp[i1++]; r,X5@/  
else if(temp[i1] data[cur]=temp[i1++]; (M5w:qbR  
else #\KSv Z  
data[cur]=temp[i2++]; Q*}#?g  
} P1)f-:;  
} W#87T_7T[  
U.is:&]E  
} y}*rRm.:  
2.CjjI  
改进后的归并排序: Ex9%i9H  
sE@t$'=  
package org.rut.util.algorithm.support; /=I&-g xC  
90L,.  
import org.rut.util.algorithm.SortUtil; L9nv05B  
["|AD,$%  
/** &54fFyJF  
* @author treeroot w|:UTJ>@  
* @since 2006-2-2 ..6 : _{wg  
* @version 1.0 rq?:I:0  
*/ Qg;A (\z  
public class ImprovedMergeSort implements SortUtil.Sort { O^ZOc0<  
4of3#M  
private static final int THRESHOLD = 10; Ac;rMwXk#  
qOYCQ  
/* rStfluPL  
* (non-Javadoc) l[lUmE  
* yPrp:%PS  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,g2|8>sJP  
*/ Z3?,r[   
public void sort(int[] data) { V{@ xhW0  
int[] temp=new int[data.length]; Z_Jprp{3h  
mergeSort(data,temp,0,data.length-1); =xcA4"k  
} "@U9'rKx  
z1[2.&9D-  
private void mergeSort(int[] data, int[] temp, int l, int r) { fmZ5rmw!  
int i, j, k; \U;4 \  
int mid = (l + r) / 2; 1| "s_m>g  
if (l == r) 7^,C=2  
return; Ci6yH( RE  
if ((mid - l) >= THRESHOLD) HPl!r0 h  
mergeSort(data, temp, l, mid); WqP>cl2Lm  
else Y)^qF)v,d  
insertSort(data, l, mid - l + 1); Jv1igA21_h  
if ((r - mid) > THRESHOLD) ?Q1(L$-=  
mergeSort(data, temp, mid + 1, r); g.OBh_j-v  
else ^{&Vv(~!Q  
insertSort(data, mid + 1, r - mid); H?98^y7  
{Ts@#V=:  
for (i = l; i <= mid; i++) { S!Ue+jW  
temp = data; {|?OKCG{  
} ~ l"70\&  
for (j = 1; j <= r - mid; j++) { Cc*"cQe  
temp[r - j + 1] = data[j + mid]; U">J$M@  
} a7'.*H]  
int a = temp[l]; ` W$  
int b = temp[r]; $O"S*)9  
for (i = l, j = r, k = l; k <= r; k++) { $G/h-6+8  
if (a < b) { "+3p??h%Rq  
data[k] = temp[i++]; YVt#( jl  
a = temp; @s!9 T  
} else { p'UYH t  
data[k] = temp[j--]; ]:`q/iS&  
b = temp[j]; :q=u+h_  
} 02E-|p;  
} "&?F 6Pi  
} l'=H,8LfA  
, f9V`Pz)  
/** *O-1zIlp  
* @param data bOjvrg;Sz\  
* @param l qS<a5`EA  
* @param i UwOZBF<  
*/ .,zrr&Po  
private void insertSort(int[] data, int start, int len) { yoa"21E$  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xLX<. z!r  
} 58\rl G  
} v#*9rNEj0  
} WNSf$D{p  
} ETvn$ Jdp  
%,f|H :+>u  
堆排序: RM\it"g  
K  +n  
package org.rut.util.algorithm.support; 4cJ7W_ >i6  
Cj31>k1  
import org.rut.util.algorithm.SortUtil; ?B ; +,  
G)5w_^&%  
/** ZN>oz@j Y  
* @author treeroot GJz d4kj  
* @since 2006-2-2 Z$!>hiz2  
* @version 1.0 B:S/ ?v  
*/ BwtjTwd  
public class HeapSort implements SortUtil.Sort{ ucP}( $  
&LM@_P"T  
/* (non-Javadoc) r&sm&4)p-5  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WLGk  
*/ rX*4$d0  
public void sort(int[] data) { g a|RW0  
MaxHeap h=new MaxHeap(); 3YT>3f!\  
h.init(data); 'o=`1I  
for(int i=0;i h.remove(); ;u`zZb=,[  
System.arraycopy(h.queue,1,data,0,data.length); S^nshQI  
} 8 CKN^8E  
,grdl|Dg  
private static class MaxHeap{ `^HAWo;J  
55xa Z#|  
void init(int[] data){ 4i0~t~vDpr  
this.queue=new int[data.length+1]; ,'[L6=#  
for(int i=0;i queue[++size]=data; |uo<<-\jTO  
fixUp(size); )]x/MC:9r  
} y ,][  
} #xL^S9P  
XnC`JO+7M  
private int size=0; 2eErvfC[  
YEfa8'7R  
private int[] queue; w@&g9e6E  
ph\KTLU  
public int get() { 0>hV?A  
return queue[1]; F FHk0!3  
} $s$j</.q  
h+EG) <  
public void remove() { dqwCyYC  
SortUtil.swap(queue,1,size--); *L_+rJj,  
fixDown(1); Pd-0u> k  
} 1F?`.~q  
file://fixdown L=Cm0q 3 v  
private void fixDown(int k) { A0{ !m  
int j; Cv7FVl-I  
while ((j = k << 1) <= size) { 0}:- t^P  
if (j < size %26amp;%26amp; queue[j] j++; ;Zfglid  
if (queue[k]>queue[j]) file://不用交换 4+&4  
break; Q/[|/uNw?  
SortUtil.swap(queue,j,k); 5J!ncLNm{  
k = j; 3[8F:I0UL  
} |"V]$s$ c  
} s5{N+O)~S  
private void fixUp(int k) { Fw ,'a  
while (k > 1) { i'Vrx(y3  
int j = k >> 1; lGHU{7j\  
if (queue[j]>queue[k]) yt,xA;g  
break; Br w-"tmx  
SortUtil.swap(queue,j,k); lq0@)'D  
k = j; Y rq-(  
} ul[edp_  
} U$CAA5HV]  
7/*Q?ic  
} cRYnQ{$'  
CBaU$`5  
} ^rF{%1DT  
cp@(y$  
SortUtil: MbY?4i00%h  
A gKG>%0  
package org.rut.util.algorithm; JMp>)*YS  
["4sCB@Tr  
import org.rut.util.algorithm.support.BubbleSort; 5 9$B z'LY  
import org.rut.util.algorithm.support.HeapSort; #H9J/k_  
import org.rut.util.algorithm.support.ImprovedMergeSort; ;-SFK+)R"  
import org.rut.util.algorithm.support.ImprovedQuickSort; vrVb/hhG  
import org.rut.util.algorithm.support.InsertSort; tbz?th\#  
import org.rut.util.algorithm.support.MergeSort; OsS5WY0H  
import org.rut.util.algorithm.support.QuickSort; j2GO ZKy  
import org.rut.util.algorithm.support.SelectionSort; J:6wFmU  
import org.rut.util.algorithm.support.ShellSort; bb<qnB  
_86pbr9  
/** ,S"a ,}8  
* @author treeroot PF$K> d  
* @since 2006-2-2 ;O7CahdF  
* @version 1.0 EPx_xX  
*/ qRXQL"Pe_l  
public class SortUtil { l :sZ  
public final static int INSERT = 1; Z}#, E ;  
public final static int BUBBLE = 2; Q-<,+[/  
public final static int SELECTION = 3; s)_Xj`Q#  
public final static int SHELL = 4; V}?d ,.m`{  
public final static int QUICK = 5; )$18a  
public final static int IMPROVED_QUICK = 6; >T'=4n['  
public final static int MERGE = 7; *>otz5]  
public final static int IMPROVED_MERGE = 8; xw?Mc{w  
public final static int HEAP = 9; _ _x2xtrH  
q,b6).  
public static void sort(int[] data) { dWR0tS6vR`  
sort(data, IMPROVED_QUICK); ,E&PIbDL1  
} P'Q|0lB  
private static String[] name={ S $wx>715  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N>, `l  
}; QWt ?` h=  
:U^!N8i"=  
private static Sort[] impl=new Sort[]{ Y\e,#y  
new InsertSort(), ]Z/<H P$#  
new BubbleSort(), z#qlu=  
new SelectionSort(), \i Ylh HD  
new ShellSort(), M%dJqwH5{  
new QuickSort(), B>kx$_~  
new ImprovedQuickSort(), =,Y i" E  
new MergeSort(), Pba 6Ay6B  
new ImprovedMergeSort(), 4F_*,_Y  
new HeapSort() /I[?TsXp  
}; g\sW2qXEw  
|&JCf =  
public static String toString(int algorithm){ 88fH !6b  
return name[algorithm-1]; Az +}[t  
} INca  
;6op|O  
public static void sort(int[] data, int algorithm) { &\(p<TF  
impl[algorithm-1].sort(data); W/*2I3a  
} ,TrrqCw>  
dP8b\H  
public static interface Sort { $umh&z/  
public void sort(int[] data); WfbG }%&J  
} Y02 cX@K6  
SKTf=rY  
public static void swap(int[] data, int i, int j) { 5<o8prt B  
int temp = data; j$l[OZ:#  
data = data[j]; /S29\^  
data[j] = temp; Uj!3H]d  
} fhx_v^< X  
} HKA7|z9{  
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