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快速排序: [BH^SvE
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package org.rut.util.algorithm.support; }SdI _sLe
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import org.rut.util.algorithm.SortUtil; |HjoaN )
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/** -7^A_!.
* @author treeroot :%!}%fkxH
* @since 2006-2-2 jAa{;p"jU
* @version 1.0 q*Hf%I"
*/ w/L^w50pt
public class QuickSort implements SortUtil.Sort{ |r]f2Mrm
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/* (non-Javadoc) urlwn*!^s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n9;z=
*/ p m4g),s
public void sort(int[] data) { v{N4*P.0T
quickSort(data,0,data.length-1); Y1?"Ut
} /-#1ys#F=
private void quickSort(int[] data,int i,int j){ +B
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int pivotIndex=(i+j)/2; CDy *8<-&
//swap /D]V3|@E
SortUtil.swap(data,pivotIndex,j); X" hoDg
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int k=partition(data,i-1,j,data[j]); 9(9+h]h+3
SortUtil.swap(data,k,j); .%.kEJh`
if((k-i)>1) quickSort(data,i,k-1); JJ50(h)U
if((j-k)>1) quickSort(data,k+1,j); ]%{.zl!
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} arCi$:-z@
/** !J5k?J&{=
* @param data X#qmwcF
* @param i J3]W2m2Zw
* @param j 5}4f[
* @return W>ziA
*/ {*=+g>RgD
private int partition(int[] data, int l, int r,int pivot) { UBmD
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do{ NZJ:@J=-
while(data[++l] while((r!=0)&&data[--r]>pivot); jm-J_o;}z6
SortUtil.swap(data,l,r); QFP3S(
}
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while(l SortUtil.swap(data,l,r); y^rcUPLT
return l; YF+hN\
} ~*3obZ2>2
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} ){AtV&{$
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改进后的快速排序: A9*( O)
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package org.rut.util.algorithm.support; Quc,,#u
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import org.rut.util.algorithm.SortUtil; uCc.dluU
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/** r'kUU]j9
* @author treeroot cTA8F"UGD
* @since 2006-2-2 n{>Ge,enP0
* @version 1.0 WIytgM
*/ SIJ:[=5!7
public class ImprovedQuickSort implements SortUtil.Sort { IL:d`Kbqf
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private static int MAX_STACK_SIZE=4096; b`NXe7A
private static int THRESHOLD=10; jV(\]g"/=
/* (non-Javadoc) >&@hm4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y_^w|
*/ _RLx;Tn)L
public void sort(int[] data) { HF9\SVR
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int[] stack=new int[MAX_STACK_SIZE]; vybQ}dscn
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int top=-1; 9uXu V$.
int pivot; U>q&p}z0H
int pivotIndex,l,r; AN!MFsk
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stack[++top]=0; 3)F9:Tzw1
stack[++top]=data.length-1; Cm~h\+"
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while(top>0){ b#**`Y
int j=stack[top--]; ?4X8l@fR
int i=stack[top--]; ;(a\F
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pivotIndex=(i+j)/2; f8ap+][
pivot=data[pivotIndex]; 2?",2x09
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SortUtil.swap(data,pivotIndex,j); _xg4;W6M=
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//partition \htL\m^$9
l=i-1; K!X>k
r=j; s m42
do{ #q;hX;Va
while(data[++l] while((r!=0)&&(data[--r]>pivot)); wzw`9^B
SortUtil.swap(data,l,r); {K{&__Nk
} +%Vbz7+!
while(l SortUtil.swap(data,l,r); ;z6Gk&?
SortUtil.swap(data,l,j); JvA6 kw,
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if((l-i)>THRESHOLD){ PGT*4r21
stack[++top]=i; @W\y#5"B
stack[++top]=l-1; #n= b*.
} kzA%.bP|
if((j-l)>THRESHOLD){ sUaUZO2V
stack[++top]=l+1; -29Sw
stack[++top]=j; o8 A]vaa
} / 38b:,
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} J 4$^Hr
//new InsertSort().sort(data); !J34yro+s
insertSort(data); cJEOwAN
} TBfX1v|Z)
/** O"otzla
* @param data P);:t~
*/ !i0jk,[B=
private void insertSort(int[] data) { /Q7cQ2[EU
int temp; :!omog
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); ,/.U'{
} 8\Y/?$on
} xy@1E;
} n@LR?
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} {HV$hU+_)Q
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