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。 PM?Ri^55<L
插入排序: K'rs9v"K|
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package org.rut.util.algorithm.support; .j<B5/+
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import org.rut.util.algorithm.SortUtil; yURh4@
/** j8A R#
* @author treeroot P;91C'T-x
* @since 2006-2-2 ,'{B+CHoS
* @version 1.0 AkQFb2|ir
*/ >5},qs:lZ
public class InsertSort implements SortUtil.Sort{ r_<i*l.
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/* (non-Javadoc) y?4=u,{C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wU3ica&[
*/ }~,cCtg:o
public void sort(int[] data) { $mg h.3z0
int temp; Oy`\8*Uy__
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); jJQfCOD$
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冒泡排序: #"YWz)8
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package org.rut.util.algorithm.support; {j4:.fD
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import org.rut.util.algorithm.SortUtil; \D k^\-
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/** O.f3 (e!
* @author treeroot zYJ`.,#C 5
* @since 2006-2-2 aZ3 #g
* @version 1.0 >d[vHyA~!D
*/ f5XcBW9E
public class BubbleSort implements SortUtil.Sort{ @?AE75E{
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/* (non-Javadoc) 7#*CWh1BNO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (:k`wh&
*/ znpZ0O\!
public void sort(int[] data) { 3/<^R}w\
int temp; xyCcd=
for(int i=0;i for(int j=data.length-1;j>i;j--){ j0NPd^
if(data[j] SortUtil.swap(data,j,j-1); J, U~.c
} e';c8WF3E
} WoR**J?}w
} jl29~^@}1i
} oQB1fs
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} dL"i\5#%A
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选择排序: uT2cHzqKB
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package org.rut.util.algorithm.support; A Mfu|%ZL
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import org.rut.util.algorithm.SortUtil; $
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/** nXW1 :
* @author treeroot }Ec"&
* @since 2006-2-2 >u[ln@ l
* @version 1.0 1 SZa\ ][@
*/ q@>
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public class SelectionSort implements SortUtil.Sort { 7:<>#
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/* M,lu)~H
* (non-Javadoc) yU`IyaazZ
* J#nEGl|a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B-zt(HG
*/ bsVOO9.4-
public void sort(int[] data) { sIM`Q%
int temp; :v48y.Ij7s
for (int i = 0; i < data.length; i++) { '93&?
int lowIndex = i; Q5ao2-\
for (int j = data.length - 1; j > i; j--) { (ZJ_&8C#
if (data[j] < data[lowIndex]) { }]) f^
lowIndex = j; AS
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} bZJiubBRI
} %J'_c|EQM
SortUtil.swap(data,i,lowIndex); 0U~JSmj:2K
} Su~`jRN$
} ^.7xu/T
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} a WC
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Shell排序: kE}Ib4]J
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package org.rut.util.algorithm.support; b1"wQM9
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import org.rut.util.algorithm.SortUtil; t@v8>J%K
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/** \/%mabLK
* @author treeroot k2a^gCBC
* @since 2006-2-2 vJ s/ett
* @version 1.0 "~6BC
*/ ~Hf,MLMdTf
public class ShellSort implements SortUtil.Sort{ G<I5%Yo6G
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/* (non-Javadoc) oc3/
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]0O$2 j_ 7
*/ ZBWe,Xvq
public void sort(int[] data) { yO)Qg*r
for(int i=data.length/2;i>2;i/=2){ -_dgd:or
for(int j=0;j insertSort(data,j,i); 70Am]L&M
} EOiKwhrV
} 6>Fw,$
insertSort(data,0,1); 6 9Cxh
} ,b8AB_yw
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/** A{k@V!A%
* @param data S_atEmQ
* @param j hG U &C]
* @param i :d;5Q\C`
*/ VI4d/2e
private void insertSort(int[] data, int start, int inc) { R.7"ZG
int temp; <5
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for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); {>qCZ#E5WO
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} &N#)(rQ1
} !
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快速排序: ,DjZDw
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package org.rut.util.algorithm.support; UkC\[$-"\
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import org.rut.util.algorithm.SortUtil; oj/tim
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/** xiiZ'U
* @author treeroot &xVWN>bd^
* @since 2006-2-2 Q'N<jX[
* @version 1.0 j(SQNSFD
*/ _i&\G}mrC
public class QuickSort implements SortUtil.Sort{ mnePm{
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/* (non-Javadoc) >&TktQO_T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T'X Rl@
*/ >wn&+%i&
public void sort(int[] data) { W^x[maz
quickSort(data,0,data.length-1); O=fT;&%.
} cIX59y#7
private void quickSort(int[] data,int i,int j){ REJ}T:
int pivotIndex=(i+j)/2; `:2C9,Xu
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SortUtil.swap(data,pivotIndex,j); Av'H(qB\K
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int k=partition(data,i-1,j,data[j]); |^=`ln!
SortUtil.swap(data,k,j); mb#)w`<
if((k-i)>1) quickSort(data,i,k-1); Lh+^GQ
if((j-k)>1) quickSort(data,k+1,j); 4bO7rhve
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} DN!EsQ6
/** T]:5y_4?[
* @param data `s+qz
* @param i '?d[ ip
* @param j $R^"~|m3M
* @return k_skn3,u
*/ Bg3^BOT
private int partition(int[] data, int l, int r,int pivot) { 6V8"[0U
do{ rnW i<Se
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); L3/ua
SortUtil.swap(data,l,r); j8PK\j[
} x&;SLEM
while(l SortUtil.swap(data,l,r); Awj`6GeJ
return l; h_cZ&P|
} FnCHbPlb
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} 2@ad! h
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改进后的快速排序: ;c'jBi5W
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package org.rut.util.algorithm.support; /5o~$S
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import org.rut.util.algorithm.SortUtil; |HL1.;1
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/** L0|u^J
* @author treeroot `527vK
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* @since 2006-2-2 xD~:= ]G
* @version 1.0 &BQ`4j~.
*/ AttDD{Ta
public class ImprovedQuickSort implements SortUtil.Sort { S]<Hx_[}
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private static int MAX_STACK_SIZE=4096; O=yUAAD$
private static int THRESHOLD=10; KQEn C`Nz
/* (non-Javadoc) O*30|[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j/9'L^]
*/ . [C~a
public void sort(int[] data) { @P%&Dha
int[] stack=new int[MAX_STACK_SIZE]; aK,G6y
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int top=-1; 0"ZRJl<)[I
int pivot; r;9F@/
int pivotIndex,l,r; 7ZN0_Qs
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stack[++top]=0; _PJd1P.k
stack[++top]=data.length-1; z0c_&@uj*
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while(top>0){ MbF.KmV
int j=stack[top--]; ,%Dn}mWu
int i=stack[top--]; 2jA-y!(e
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pivotIndex=(i+j)/2; y_QK _R<