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快速排序: _sf#J|kQ
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package org.rut.util.algorithm.support; Ot2zhR )
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import org.rut.util.algorithm.SortUtil; )S wG+k,
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/** uku}Mr"p
* @author treeroot _8NEwwhc
* @since 2006-2-2 ;1R?9JN"
* @version 1.0 X8,7_D$
*/ N&x WHFn]C
public class QuickSort implements SortUtil.Sort{ S-M)MCL
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/* (non-Javadoc) Av;q:x?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P+;CE|J`X
*/ B.Zm$JZ:
public void sort(int[] data) { veX"CY`hn
quickSort(data,0,data.length-1); ^ =/?<C4
} 6<qwP?WN
private void quickSort(int[] data,int i,int j){ sx[&4 k[
int pivotIndex=(i+j)/2; %eutfM-?6
//swap ;Oi[:Ck
SortUtil.swap(data,pivotIndex,j); \&\_>X.,
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int k=partition(data,i-1,j,data[j]); ;Txv-lfS
SortUtil.swap(data,k,j); u6iU[5
if((k-i)>1) quickSort(data,i,k-1); (/"K+$8'
if((j-k)>1) quickSort(data,k+1,j); nI` f_sp
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} 6=G~6Qu
/** 5M<'A=
* @param data v ]/OAH6D
* @param i nL":0!DTRD
* @param j !y
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* @return R%Ui6dCLo
*/ `FzYvd"N
private int partition(int[] data, int l, int r,int pivot) { d4y9AE@k
do{ FUyB"-<
while(data[++l] while((r!=0)&&data[--r]>pivot); s.R-<Y3
SortUtil.swap(data,l,r); 68koQgI[^
} |b$>68:
while(l SortUtil.swap(data,l,r); F}6DB*
return l; }XGMa?WR
} Z{,GZT
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} 0|fb< "
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改进后的快速排序: ;t;Y.*&=S
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package org.rut.util.algorithm.support; VxkCK02k
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import org.rut.util.algorithm.SortUtil; z.2r@Psk
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/** E ;BPN
* @author treeroot sJ))<,e5I
* @since 2006-2-2 [K cki+
* @version 1.0 V>b2b5QAH,
*/ }J ei$0x
public class ImprovedQuickSort implements SortUtil.Sort { mQd4#LJ_
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private static int MAX_STACK_SIZE=4096; ,hpH!J'5f/
private static int THRESHOLD=10; ~ON1Zw[+
/* (non-Javadoc) *#&k+{a^2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |^7f\.oF
*/ f7XQ~b
public void sort(int[] data) { &a%WM
int[] stack=new int[MAX_STACK_SIZE]; a|DsHZ^6^
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int top=-1; prNhn:j
int pivot; IVI~1~
int pivotIndex,l,r; ./'~];&
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stack[++top]=0; sU) TXL'_!
stack[++top]=data.length-1; s<[A0=LH
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while(top>0){ :a_BD
int j=stack[top--]; ?z2jk
int i=stack[top--]; K0w<[CO
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pivotIndex=(i+j)/2; V]I:2k5
pivot=data[pivotIndex]; C`\9cej
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SortUtil.swap(data,pivotIndex,j); uh]"(h(>
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//partition S~KS9E~\
l=i-1; v,/[&ASz
r=j; yXJ]U
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do{ J|VK P7
while(data[++l] while((r!=0)&&(data[--r]>pivot)); 9T(L"9r-e
SortUtil.swap(data,l,r); ;B&^yj&;
} e^j<jV`1
while(l SortUtil.swap(data,l,r); IByf_E;r
SortUtil.swap(data,l,j); 2t+D8 d|c<
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if((l-i)>THRESHOLD){ >_XOc
stack[++top]=i; `NBbTQtgO
stack[++top]=l-1; ldA!ou7
} QX[Djz0H8
if((j-l)>THRESHOLD){ 6iG(C.b
stack[++top]=l+1; Zy^=fM
stack[++top]=j; DH
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} ev9;Ld
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} sLb8*fak
//new InsertSort().sort(data); 3sH\1)Zz
insertSort(data); g>so
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} 9YB2e84j
/** !; IJ
* @param data 9A~>`.y
*/ QV7,G9
private void insertSort(int[] data) { geksjVwPH
int temp; ^YGTh0$W
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); P?kx
} ?hnx/z+uT
} !O|ql6^;
} 3gAR4
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} \[yr=X
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