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快速排序: jdqj=Yc
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package org.rut.util.algorithm.support; Kf,-4)
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import org.rut.util.algorithm.SortUtil; 5"Kx9n|
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/** y>VcgLIB
* @author treeroot =(r*
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* @since 2006-2-2 Tp%(I"H'_;
* @version 1.0 M@UVpQwgv
*/ TJ@Cj y%
public class QuickSort implements SortUtil.Sort{ wOgE|n
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/* (non-Javadoc) B\`Aojw"E?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &R-H"kK?
*/ (il0M=M
public void sort(int[] data) { ]hw-Bu\{
quickSort(data,0,data.length-1); wNCCH55Pt
} WV<tyx9Z
private void quickSort(int[] data,int i,int j){ eH>#6R1-
int pivotIndex=(i+j)/2; *6ZCDm&N
//swap N"5fmY<
SortUtil.swap(data,pivotIndex,j); CX/(o]
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int k=partition(data,i-1,j,data[j]); t@zdmy
SortUtil.swap(data,k,j); XH 4d<?qu
if((k-i)>1) quickSort(data,i,k-1); 3SG?W_
if((j-k)>1) quickSort(data,k+1,j); ~XM[>M\qB
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} Z)<
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/** h,t|V}Wb
* @param data 4n( E;!s
* @param i T`YwJ6N
* @param j q%3<Juq~$
* @return {[G`Z9]z&-
*/ U5ZX78>a
private int partition(int[] data, int l, int r,int pivot) { U..<iNQE5
do{ +=@ ^i'
while(data[++l] while((r!=0)&&data[--r]>pivot); &k>aP0k"
SortUtil.swap(data,l,r); Ggm` ~fS
} 0~A#>R'
while(l SortUtil.swap(data,l,r); W.}].7}h
return l; 6Z:YT&,f
} BNm4k7
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} l[h'6+o
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改进后的快速排序: y=N"=Z
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package org.rut.util.algorithm.support; =yiOJyx
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import org.rut.util.algorithm.SortUtil; O12Q8Oj!0
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/** fv'4f$U
* @author treeroot x"B'zP
* @since 2006-2-2 }p3b#fAr
* @version 1.0 eD#XDK
*/ HMQI&Lh=U
public class ImprovedQuickSort implements SortUtil.Sort { v"lf-c
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private static int MAX_STACK_SIZE=4096; =
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private static int THRESHOLD=10; >IvBUM[Rt
/* (non-Javadoc) @|A|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }0/a\
*/ D_D,t8_Y
public void sort(int[] data) { APBK9ky
int[] stack=new int[MAX_STACK_SIZE]; Ej(2w Q
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int top=-1; CY"i-e"q<Q
int pivot; V0i9DK|!
int pivotIndex,l,r; ?T'][q
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stack[++top]=0; <4X?EYaTq
stack[++top]=data.length-1; '1+.t$"/tU
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while(top>0){ A|RR]CFJ
int j=stack[top--]; " ~Q*XN2
int i=stack[top--]; fEqC] *s
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pivotIndex=(i+j)/2; "dCzWFet
pivot=data[pivotIndex]; aC\4}i<
/=T"=bP#/
SortUtil.swap(data,pivotIndex,j); y?:dE.5p|
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//partition ZwJciT!_~
l=i-1; o}D![/
r=j; ,;iA2
do{ "sbBe73 m
while(data[++l] while((r!=0)&&(data[--r]>pivot)); X#J6Umutm
SortUtil.swap(data,l,r); vA>W9OI
} v*TeTA
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while(l SortUtil.swap(data,l,r); {*xBm#
SortUtil.swap(data,l,j); avNLV
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if((l-i)>THRESHOLD){ ~"7J}[i5
stack[++top]=i; ww,Z )m
stack[++top]=l-1; Jt=>-Spj
} 19I:%$U3
if((j-l)>THRESHOLD){ /~hbOs/
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stack[++top]=l+1; rg)h5G
stack[++top]=j; r*d Q5
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} TA;,>f*
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} " i`8l.Lc
//new InsertSort().sort(data); ^KH%mSX>
insertSort(data); P\(30
} I: U$
/** l,bZG3,6
* @param data Mq+<mX7
*/ _Ex?Xk
private void insertSort(int[] data) { OmNn,PCl8
int temp; =J3`@9;
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); Phlk1*1n
} n-OWwev)
} Xp^$
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} ,"H?hFQ
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} BE4\U_]a3
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