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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。 <9=zP/Q  
插入排序: n>u.3w L  
!>CE(;E>z  
package org.rut.util.algorithm.support; V+Y|4Y&  
R 4DM_ u  
import org.rut.util.algorithm.SortUtil; XPar_8I  
/** d^ 2u}^kG  
* @author treeroot s>LA3kT  
* @since 2006-2-2 uCY(:;[<  
* @version 1.0 F~tm`n8Z  
*/ @~JB\j9  
public class InsertSort implements SortUtil.Sort{ 7h(HG?2Y  
) ~ l\  
/* (non-Javadoc) 1[26w_B3  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >`<Ued  
*/ Mr$# e  
public void sort(int[] data) {  aeEw#  
int temp; H|grbTv,  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); &mX5&e  
} Is4%}J!8  
} :Tlf4y:/w  
} *>E I2HX  
AQE eIFH  
} Y'tqm&}  
pw0Px  
冒泡排序: |Dl*w/n  
}@3Ud ' Y  
package org.rut.util.algorithm.support; w%>aR_G  
xnJjCEZ  
import org.rut.util.algorithm.SortUtil; Dm7Y#)%8  
5LDQ^n  
/** it(LphB8  
* @author treeroot G> f^ 2  
* @since 2006-2-2 CnxK+1n l  
* @version 1.0 3$GY,B  
*/ _<u8%\  
public class BubbleSort implements SortUtil.Sort{ /X(@|tk:  
@N,:x\  
/* (non-Javadoc) N BV}4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3r,1^h  
*/ G3Idxs  
public void sort(int[] data) { 6a "VCE]  
int temp; ap Fs UsE  
for(int i=0;i for(int j=data.length-1;j>i;j--){ *ge].E  
if(data[j] SortUtil.swap(data,j,j-1); jA20c(O  
} y0/WA4,  
} ]jHh7> D  
} BNAguAxWo  
} #E- VW  
k98< s  
} 7P3 <o!YA  
KzEuPJ?  
选择排序: >2l13^Y  
l.__10{  
package org.rut.util.algorithm.support; u Y?/B~  
qZT 4+&y  
import org.rut.util.algorithm.SortUtil; Q'n(^tbL  
4+ASw N9  
/** 4e=/f,o1  
* @author treeroot ,Y+r<;  
* @since 2006-2-2 Ss"|1]acP  
* @version 1.0 8>C; >v  
*/ .b =M5JsyV  
public class SelectionSort implements SortUtil.Sort { 2ApDpH`fiJ  
8m#}S\m  
/* 3v8V*48B$  
* (non-Javadoc) F/Rng'l  
* Cfv L)f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .){e7U6b{  
*/ Uq<a22t@  
public void sort(int[] data) { Ze [g0"  
int temp; Y9IJ   
for (int i = 0; i < data.length; i++) { Cm,*bgX  
int lowIndex = i;  ltCwns  
for (int j = data.length - 1; j > i; j--) { ;n(#b8r9  
if (data[j] < data[lowIndex]) { ]`#xR *a  
lowIndex = j; e5*5.AB6&  
} 9f\aoVX  
} bE7(L $UF  
SortUtil.swap(data,i,lowIndex); )LXoey!aZ  
} v`[Tl  
} e67c:Z  
AijPN  
} "E@NZ*"u  
[ 4?cM\_u@  
Shell排序: Uv @!i0W  
.4S^nP  
package org.rut.util.algorithm.support; _aXP ;kFMi  
?D*Hl+iu  
import org.rut.util.algorithm.SortUtil; ?$"x^=te7  
T..N*6<X  
/** <Um1h:^   
* @author treeroot JfZL?D{NM  
* @since 2006-2-2 C?GvTc  
* @version 1.0 ^%K1R;  
*/ ;,F-6RNj  
public class ShellSort implements SortUtil.Sort{ rh:s 7  
TTA{#[=7  
/* (non-Javadoc) Z^/z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VYl_U?D  
*/ fWtb mUq  
public void sort(int[] data) { A&NC0K}G!  
for(int i=data.length/2;i>2;i/=2){ I3}HNGvU  
for(int j=0;j insertSort(data,j,i); *6 z'+'  
} J[j/aDdP  
} ue6/EN;}  
insertSort(data,0,1); ,$MWk(S  
} nvO%  
Nt`F0 9S  
/** Z/V`Z* fy  
* @param data &.cGj @1!J  
* @param j LW83Y/7  
* @param i ;ZxK3/(7  
*/ rQd1Ch  
private void insertSort(int[] data, int start, int inc) { Sa h<sb=  
int temp; }$&T O$LX  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); "W?l R4  
} Y0P}KPD  
} bl:a&<F  
} ~cO?S2!W  
9}%~w(P  
} |kBg8).B  
M(.uu`B  
快速排序: )[y!m9Vn  
)H[h53bIq  
package org.rut.util.algorithm.support; 5@R15q@c6n  
~_dBND?  
import org.rut.util.algorithm.SortUtil; K]H"qG.K  
A:8FJ3'  
/** d+YVyw.z  
* @author treeroot Q8}TNJsU  
* @since 2006-2-2 \jF" nl  
* @version 1.0 vc>^.#7   
*/ ??$i*  
public class QuickSort implements SortUtil.Sort{ BRo R"#'  
IEIxjek  
/* (non-Javadoc) P\*2c*,W;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W G3mQ\k  
*/ dN$D6*  
public void sort(int[] data) { 3&a*]  
quickSort(data,0,data.length-1); X*0eN3o.  
} C)&gL=O*$  
private void quickSort(int[] data,int i,int j){ _-|yCo  
int pivotIndex=(i+j)/2; tKs4}vW  
file://swap D*d 3w  
SortUtil.swap(data,pivotIndex,j); GM9]>"#o\  
+s+PnZ%0V  
int k=partition(data,i-1,j,data[j]); wa(Wit"-  
SortUtil.swap(data,k,j); T9<H%iF  
if((k-i)>1) quickSort(data,i,k-1); ;i-D~Np|  
if((j-k)>1) quickSort(data,k+1,j); ^huBqEs  
^V XXq  
} n7`.<*:  
/** Sq?6R}q%  
* @param data >n$E e J  
* @param i IxEQh)J X  
* @param j k"DQbUy0L  
* @return WRLu 3nBx  
*/ ' F 6au[  
private int partition(int[] data, int l, int r,int pivot) { |04}zU%N  
do{ (<> Sz(  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); C~ }Wo5  
SortUtil.swap(data,l,r); xdbu|fC  
} 3-9J "d !  
while(l SortUtil.swap(data,l,r); @ @3)D%h  
return l; D:6x*+jah)  
} r0Y?X\l*  
mTXNHvv  
} 8eS@<[[F#  
|j5A U  
改进后的快速排序: T_oW)G  
654jS!  
package org.rut.util.algorithm.support; ; K)?:  
I).^,%>Z)  
import org.rut.util.algorithm.SortUtil; wEo-a< (  
]mO+<{{4X  
/**  jKb=Zkd  
* @author treeroot uc"[qT(X  
* @since 2006-2-2 H z < M  
* @version 1.0 Skk3M?  
*/ VvM U)  
public class ImprovedQuickSort implements SortUtil.Sort { Tl/Dq(8JH  
^Lg{2hjj  
private static int MAX_STACK_SIZE=4096; P :7l#/x_  
private static int THRESHOLD=10; ('o; M:  
/* (non-Javadoc) w=P <4 bdT  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {6=H/g=:i  
*/ Me K\eZ\  
public void sort(int[] data) { 9/X v&<Tn  
int[] stack=new int[MAX_STACK_SIZE]; fbx;-He!  
+}G>M=t::  
int top=-1; k.? T.9  
int pivot; 8tFyNl`c  
int pivotIndex,l,r; d~z<,_ r5c  
 7 zP  
stack[++top]=0; (PT?h>|St  
stack[++top]=data.length-1; g6a3MJV`  
c J"]yG)=  
while(top>0){ d,Dg"Z  
int j=stack[top--]; Z#cU#)`y1  
int i=stack[top--]; ;ijfI  
\ \mO+N47i  
pivotIndex=(i+j)/2; \'^Z_6{w  
pivot=data[pivotIndex]; Med"dHo7  
n nnA,  
SortUtil.swap(data,pivotIndex,j); *V@MAt  
g9lg  
file://partition KbuGf$Bv  
l=i-1; #35S7G^@`  
r=j; @SQ*/sw (c  
do{ Fp|rMq  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); uTlT'9)  
SortUtil.swap(data,l,r); Bdk{.oh6  
} E6^S2J2  
while(l SortUtil.swap(data,l,r); tgF(=a]o  
SortUtil.swap(data,l,j); _6ax{:/Q  
C5lD Hw[CX  
if((l-i)>THRESHOLD){ ^J5V!i$  
stack[++top]=i; t+)GB=C  
stack[++top]=l-1; \tw#p k  
} koWb@V]  
if((j-l)>THRESHOLD){ B43#9CK`o  
stack[++top]=l+1; szsZFyW )+  
stack[++top]=j; , LPFb6o  
} zH\;pmWiN9  
j n&9<"W  
} A@Yi{&D_Q]  
file://new InsertSort().sort(data); pvwnza1  
insertSort(data); @okm@6J*X  
} 4z 3$  
/** I\4`90uBN  
* @param data :c/=fWM%  
*/ :;#}9g9  
private void insertSort(int[] data) { w-Q 6 -  
int temp; FLnAN;  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); wM&x8 <  
} fvBC9^3  
} zl8\jP  
} I(kIHjV|  
) ImIPSL  
} q2U"k  
R\Ynn^w  
归并排序: ?yM/j7Xn  
2'^OtM,  
package org.rut.util.algorithm.support; N4]6LA6x6  
[N$_@[  
import org.rut.util.algorithm.SortUtil; jvKaxB;e  
%Ja{IWz9L  
/** E,?aBRxy  
* @author treeroot 8Carg~T@  
* @since 2006-2-2 y2% ^teX k  
* @version 1.0  F-\8f(\  
*/ tlxjs]{0E  
public class MergeSort implements SortUtil.Sort{ kd4*Zab  
+n~rM'^4/  
/* (non-Javadoc) 9M~$W-5  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \,#4+&4b  
*/ 7Hlh (k  
public void sort(int[] data) { >5},qs:lZ  
int[] temp=new int[data.length]; 3$G25=eN  
mergeSort(data,temp,0,data.length-1); 2F@<{v4  
} )xy{[ K|M(  
9l^  
private void mergeSort(int[] data,int[] temp,int l,int r){ M,U=zNPnk  
int mid=(l+r)/2; L$?~TY  
if(l==r) return ; Zu73x#pI  
mergeSort(data,temp,l,mid); 3bL2fsn5  
mergeSort(data,temp,mid+1,r); W oG  
for(int i=l;i<=r;i++){ Oy`\8*Uy__  
temp=data; =xWW+w!r  
} dSD}NM  
int i1=l; 9 v3Nba  
int i2=mid+1; n[S*gX0  
for(int cur=l;cur<=r;cur++){ 7XC}C+  
if(i1==mid+1) pQ`L=#WM  
data[cur]=temp[i2++]; >;U%~yy}qc  
else if(i2>r) q9z!g/,d/  
data[cur]=temp[i1++]; zyn =Xv@p  
else if(temp[i1] data[cur]=temp[i1++]; B-p5;h>  
else K>JU/(  
data[cur]=temp[i2++]; kT=|tQ@  
} ' g!_Flk  
} NP`ll0s  
?B:wV?-`  
} eOO*gM=  
MP&4}De  
改进后的归并排序: U~@B%Msb L  
Fm~}A4  
package org.rut.util.algorithm.support; mNB ]e5 ;N  
JM9Q]#'t  
import org.rut.util.algorithm.SortUtil; -@?>nLQb  
bN %MT#X  
/** ) G&3V  
* @author treeroot UdgI<a~`k6  
* @since 2006-2-2 Uy'ZL(2  
* @version 1.0 " yl"A4p S  
*/ `X03Q[:q"[  
public class ImprovedMergeSort implements SortUtil.Sort { aL6 5t\2  
eb woMG,B-  
private static final int THRESHOLD = 10; hUvH t+d  
%pKs- n`  
/* h0QQP  
* (non-Javadoc) J3E:r_+  
* u+FftgA  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aVL%-Il}  
*/ j'b4Sb s-f  
public void sort(int[] data) { 4KB?g7_*  
int[] temp=new int[data.length]; 5. UgJ/  
mergeSort(data,temp,0,data.length-1); J, U~ .c  
} ?Og ;W9i  
UsKn4Kh  
private void mergeSort(int[] data, int[] temp, int l, int r) { bvvx(?!  
int i, j, k; p tfADG  
int mid = (l + r) / 2; itMc!bUQ  
if (l == r) G2k71{jK  
return; 2Ps `!Y5  
if ((mid - l) >= THRESHOLD) GgZf6~b1J  
mergeSort(data, temp, l, mid); \:28z  
else dL"i\5#%A  
insertSort(data, l, mid - l + 1); "2j~3aWj  
if ((r - mid) > THRESHOLD) vv_?ip:t  
mergeSort(data, temp, mid + 1, r); *M5C*}dl  
else uT2cHzqKB  
insertSort(data, mid + 1, r - mid); ;8kfgp M_  
@}RyW&1Z  
for (i = l; i <= mid; i++) { QCnVZ" !(  
temp = data; Y0'^S<ox  
} #Jb$AA! z  
for (j = 1; j <= r - mid; j++) { Mi-9sW  
temp[r - j + 1] = data[j + mid]; +& Qqu`)?F  
} @2O\M ,g5  
int a = temp[l]; (Gs g+c   
int b = temp[r]; h"m7r4f  
for (i = l, j = r, k = l; k <= r; k++) { g 0=t9J  
if (a < b) { v65r@)\`  
data[k] = temp[i++]; K",]_+b  
a = temp; b=go"sJ@>(  
} else { Um&@ 0C+L  
data[k] = temp[j--]; 2l%iXK[  
b = temp[j]; (acRYv(  
} q@> m~R  
} t')I c6.?i  
} Stx-(Kfn4  
.6(i5K  
/** Onyq'  
* @param data #r}c<?>Vw  
* @param l |Q+v6r(<zZ  
* @param i yU`IyaazZ  
*/ 3P>@ :  
private void insertSort(int[] data, int start, int len) { Dn! V)T  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fm{y.URo  
} 0$ EJ4  
} $nN$"  
} }e w?{  
} _"TG:RP  
QY! A[!6h  
堆排序: HX[#tT|m~  
jlZNANR3  
package org.rut.util.algorithm.support; 7MfvU|D[d/  
Jl}7]cVq#  
import org.rut.util.algorithm.SortUtil; ~=Sr0+vV  
;T(^riAEl  
/** b`=rd 4cpU  
* @author treeroot M?97F!\U  
* @since 2006-2-2 8i"fhN3?Y  
* @version 1.0 Rh^$0Q*2  
*/ 2|EoP-K7  
public class HeapSort implements SortUtil.Sort{ o)DKP>IM#  
JJa?"82FXZ  
/* (non-Javadoc) i[ lH@fJm_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O%{>Zo_<  
*/ ],m-,K  
public void sort(int[] data) { eSf:[^  
MaxHeap h=new MaxHeap(); {^iV<>J  
h.init(data); ]5CFL$_Q{  
for(int i=0;i h.remove(); ~*Wb MA  
System.arraycopy(h.queue,1,data,0,data.length); H2p;J#cv@  
} q3t@)+l>*  
uWQ.h ,  
private static class MaxHeap{ ==9Ez  
l0V@19Ec  
void init(int[] data){ N*;/~bt7 P  
this.queue=new int[data.length+1]; H(|v  
for(int i=0;i queue[++size]=data; oKiu6=  
fixUp(size); s,= ^V/c  
} 7va%-&.&t  
} >@o*v*25  
T9 1Iz+j  
private int size=0; JKGZ0yn  
9:>vl0  
private int[] queue; CJ>=odK[  
O jmz/W  
public int get() { G})mw  
return queue[1]; XafyI*pOX  
} E&AR=yqk  
w.jATMJ)F  
public void remove() { 'AU!xG6OQ  
SortUtil.swap(queue,1,size--); `Hqu 2 '`  
fixDown(1); NgQl;$  
} w6tY6bf}  
file://fixdown A_+ WY|#M  
private void fixDown(int k) { MmB-SR[>P  
int j; BN67o]*]<  
while ((j = k << 1) <= size) { =v}.sJ V?  
if (j < size %26amp;%26amp; queue[j] j++; Lj#6K@u@Z  
if (queue[k]>queue[j]) file://不用交换 im`^_zebj  
break; ){Y2TWW&0  
SortUtil.swap(queue,j,k); {z7{ta  
k = j; 6>Fw,$  
} 6 9Cxh  
} P#C`/%$S  
private void fixUp(int k) { *Bj G3Jc5  
while (k > 1) { B^Q#@[T   
int j = k >> 1; 6lGL.m'Ra  
if (queue[j]>queue[k]) (`N/1}vk  
break; I <7K^j+5:  
SortUtil.swap(queue,j,k); jdzV&  
k = j; }\F>z  
} 6)8']f  
} @QofsWC  
:>;#/<3{  
} ;-F#a+2]!  
 i.]}ooI  
} gDrqs>8  
4#T'Fy].  
SortUtil: &*}S 0  
:zCm$@  
package org.rut.util.algorithm; {XAKf_Cg  
h0`) =  
import org.rut.util.algorithm.support.BubbleSort; "T'!cy  
import org.rut.util.algorithm.support.HeapSort; ?{n#j,v!  
import org.rut.util.algorithm.support.ImprovedMergeSort; sC$X7h(Q+  
import org.rut.util.algorithm.support.ImprovedQuickSort; N=kACEo  
import org.rut.util.algorithm.support.InsertSort; ^s-3U  
import org.rut.util.algorithm.support.MergeSort; kF5}S8B  
import org.rut.util.algorithm.support.QuickSort; xiiZ'U  
import org.rut.util.algorithm.support.SelectionSort; p ,!`8c6  
import org.rut.util.algorithm.support.ShellSort; !dGgLU_  
9D bp`%j  
/** 6\`,blkX  
* @author treeroot c:bB4ch}  
* @since 2006-2-2 (?Yz#Yf  
* @version 1.0 LTF%b AQ,  
*/ al2v1.Y}  
public class SortUtil { W{`;][  
public final static int INSERT = 1; rtI4W  
public final static int BUBBLE = 2; F-nt7l  
public final static int SELECTION = 3; {"<Q?yA2y  
public final static int SHELL = 4; CNwhH)*  
public final static int QUICK = 5; 5segzaI  
public final static int IMPROVED_QUICK = 6; )gR&Ms4  
public final static int MERGE = 7; $KiA~l  
public final static int IMPROVED_MERGE = 8; biJU r^n  
public final static int HEAP = 9; `>V.}K^4  
ZE9*i}r  
public static void sort(int[] data) { /swTn1<Y  
sort(data, IMPROVED_QUICK); P _ SJK  
} myYe~f4=HQ  
private static String[] name={ 1+^c3Dd`  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %l,Xt"nS#  
}; !#r]f9QP  
BdceINI  
private static Sort[] impl=new Sort[]{ UY==1\  
new InsertSort(), YC$pT  
new BubbleSort(), 6O"0?wG+  
new SelectionSort(), rScmUt  
new ShellSort(), {kC]x2 U  
new QuickSort(),  j>6{PDaT  
new ImprovedQuickSort(), H;^6%HV1  
new MergeSort(), mr*zl*  
new ImprovedMergeSort(), \+,jM6l}-  
new HeapSort() BKIt,7j  
}; n4:WM+f4  
 2}`OjVS  
public static String toString(int algorithm){ rnW i<Se  
return name[algorithm-1]; L3/ua  
} j8PK\j[  
x&;SLEM   
public static void sort(int[] data, int algorithm) { Awj`6GeJ  
impl[algorithm-1].sort(data); f_ ::?  
} -Ju!2by  
xGA%/dy,;  
public static interface Sort { `pKQ|zGw  
public void sort(int[] data); 29E^]IL?  
} CV`  I.  
{ d/k0H  
public static void swap(int[] data, int i, int j) { | o?@Eh  
int temp = data; /5o~$S  
data = data[j]; "];19]x6q  
data[j] = temp; ie_wJ=s  
} |HL1.;1  
} IE|$>q0Z  
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