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快速排序: j.:f=`xf
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package org.rut.util.algorithm.support;
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import org.rut.util.algorithm.SortUtil; 0>:`|IGnT2
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/** $x2G/5?
* @author treeroot 0OBwe6*
* @since 2006-2-2 W=4|ahk$
* @version 1.0 .jl^"{@6
*/ !'-./LD")
public class QuickSort implements SortUtil.Sort{ zKGr(9I
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/* (non-Javadoc) 'grb@+w(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |T{ZDJ+
*/ 5#::42oE
public void sort(int[] data) { iOiXo6YE
quickSort(data,0,data.length-1); X
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} Tvw(Sq};
private void quickSort(int[] data,int i,int j){ y2Vc[o(NP
int pivotIndex=(i+j)/2; 0gr#<(
//swap c[EG
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SortUtil.swap(data,pivotIndex,j); h8P_/.+g|V
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int k=partition(data,i-1,j,data[j]); 8xHjdQr
SortUtil.swap(data,k,j); }R`}Ey|{
if((k-i)>1) quickSort(data,i,k-1); '8b=4mrbH
if((j-k)>1) quickSort(data,k+1,j); QY$4D;M`g6
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} Q`Ug tL
/** Nrc-@ ]
* @param data u43-\=1$T
* @param i ihIRB9
* @param j .&/A!3pW
* @return xt8@l
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*/ 9\i^.2&
private int partition(int[] data, int l, int r,int pivot) { kp*BAQ
do{ H}lbF0`
while(data[++l] while((r!=0)&&data[--r]>pivot); aq8mD^j -&
SortUtil.swap(data,l,r); cd$,,
} +Q!Kj7EU/
while(l SortUtil.swap(data,l,r); (ewcj\l4*
return l; Zk0? =f?j
} C12y_E8Un
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} jxnb<!|?H@
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改进后的快速排序: uQkQ#'e|
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package org.rut.util.algorithm.support; qb5IpI{U
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import org.rut.util.algorithm.SortUtil; > u=nGeO
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/** g")pvK[e
* @author treeroot q,(hs]\@
* @since 2006-2-2 s=n_(}{ q
* @version 1.0 fwaM ;YN_
*/ x2+M0 }g
public class ImprovedQuickSort implements SortUtil.Sort { -ha[xM05
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private static int MAX_STACK_SIZE=4096; ~T&X#i
private static int THRESHOLD=10; dZ\T@9+j+
/* (non-Javadoc) T\L
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e{d$OzT) V
*/ IeBb#Qedz
public void sort(int[] data) { .T}S[`Yx5
int[] stack=new int[MAX_STACK_SIZE]; q|e<b
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int top=-1; 92L{be;SY
int pivot; [Kd"M[1[<
int pivotIndex,l,r; Zy >W2(<
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stack[++top]=0; n:YA4t7S
stack[++top]=data.length-1; DJHE6XJ
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while(top>0){ '8fL)Zk
int j=stack[top--]; D]d2opBLj
int i=stack[top--]; )X-TJ+d
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pivotIndex=(i+j)/2; XwdehyPhT2
pivot=data[pivotIndex]; cin3)lm
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SortUtil.swap(data,pivotIndex,j); ,T7(!)dR
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//partition Ib$?[
l=i-1; Y--Uo|H
r=j; xsXf_gGu
do{ )"<:Md$7
while(data[++l] while((r!=0)&&(data[--r]>pivot)); pw1&WP&?3
SortUtil.swap(data,l,r); {NV=k%MTmi
} - Tr*G4
while(l SortUtil.swap(data,l,r); Q?W}]RW
SortUtil.swap(data,l,j); 1FmVx
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if((l-i)>THRESHOLD){ ca8.8uHY\
stack[++top]=i; ]}dAm S/
stack[++top]=l-1; -j"2rIl4#
} 04R-}
if((j-l)>THRESHOLD){ C?%Oi:Gi&
stack[++top]=l+1; 1fb!sbGD.k
stack[++top]=j; PQ[x A*
} 9$P*fx&m
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} Hf$LWPL)lM
//new InsertSort().sort(data); KmRxbf
insertSort(data); STgYXA(
} /h73'"SpDy
/** JD$;6Jv3P
* @param data ?TVR{e:
*/ 8&9'1X5)8_
private void insertSort(int[] data) { w97B)Kn6
int temp; 7 {#^zr
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); Tof H=d
} S`GM#( t@_
} w.\#!@kZ!
} 4vRIJ}nQ
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} dzZ75
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