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快速排序: /pAm8vK
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package org.rut.util.algorithm.support; AHp830\
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import org.rut.util.algorithm.SortUtil; L5-T6CD
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/** RTPq8S"
* @author treeroot Ef,7zKG
* @since 2006-2-2 q 2_N90u
* @version 1.0 uFm(R/V
*/ QoT3;<r}
public class QuickSort implements SortUtil.Sort{ ~RZJ/%6F
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/* (non-Javadoc) Tdk2436=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bo~{<UT
*/ ?d>P+).
public void sort(int[] data) { "2#-xOCO
quickSort(data,0,data.length-1); n!l./>N
} ]RJb;
private void quickSort(int[] data,int i,int j){ Oet#wp/I
int pivotIndex=(i+j)/2; 1Rb XM n
//swap lgv-)5|O+H
SortUtil.swap(data,pivotIndex,j); ]]h:#A2
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int k=partition(data,i-1,j,data[j]); @^y?Bh9jQ
SortUtil.swap(data,k,j); }ZM*[j
if((k-i)>1) quickSort(data,i,k-1); He0N
if((j-k)>1) quickSort(data,k+1,j); `\RX~ $^
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} 0]h8)EW
/** &z xBi"
* @param data &0th1-OP_
* @param i 4mM2C`I
* @param j YvxMA#
* @return c5wkzY h
*/ "&~?Hzm
private int partition(int[] data, int l, int r,int pivot) { 5Sm 5jRr
do{ T je o*n^
while(data[++l] while((r!=0)&&data[--r]>pivot); B:6sVJ
SortUtil.swap(data,l,r); IQk#
} @sgT[P*ut
while(l SortUtil.swap(data,l,r); *1o+o$hY2
return l; 4B3irHs\Q
} v8U1uOR,%
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} TsFdy{/o*
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改进后的快速排序: qUoMg%Z%l
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package org.rut.util.algorithm.support; <<W.x)#:
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import org.rut.util.algorithm.SortUtil; mSk :7ozZ
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/** \: _.N8"
* @author treeroot Y#SmZ*zok
* @since 2006-2-2 'wB Huq
* @version 1.0 K9I,Q$&xX
*/ pw<q?q%
public class ImprovedQuickSort implements SortUtil.Sort { [oU+b(
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private static int MAX_STACK_SIZE=4096; M::IE|h
private static int THRESHOLD=10; C)KtM YA,
/* (non-Javadoc) e??{&[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /|u]Y/ *
*/ }x#P<d(
public void sort(int[] data) { wc+N
int[] stack=new int[MAX_STACK_SIZE]; T956L'.+G
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int top=-1; mBpsgm:g^
int pivot; WRcFE<
int pivotIndex,l,r; `6BS-AVO7
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stack[++top]=0; |B{$URu
stack[++top]=data.length-1; ,5A>:2 zs
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while(top>0){ Nh\8+v*+{
int j=stack[top--]; DKVt8/vq
int i=stack[top--]; {OhkuON
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pivotIndex=(i+j)/2; R
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pivot=data[pivotIndex]; ?k:])^G5
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SortUtil.swap(data,pivotIndex,j); t0V_ c'm
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//partition ad$Qs3)6o
l=i-1; P15* VPy
r=j; %oCjZ"ke
do{ J_wz'eIb0
while(data[++l] while((r!=0)&&(data[--r]>pivot)); oCdOC5
SortUtil.swap(data,l,r); _!^FW%
} DCt:EhC
while(l SortUtil.swap(data,l,r); > ^v8N
SortUtil.swap(data,l,j); u$%#5_k
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if((l-i)>THRESHOLD){ k>0cTBY&
stack[++top]=i; 55\X\>
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stack[++top]=l-1; uQ%HLL-W/
} P7x?!71?L
if((j-l)>THRESHOLD){ GY$?^&OO>
stack[++top]=l+1; <9k}CXv2PK
stack[++top]=j; kz VI:
} + $a:X
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} Ae_ E;[mj
//new InsertSort().sort(data); ;gW|qb+#)j
insertSort(data); FTYLMQ
i
} 4TQISu)
/** 4tTZkJc
* @param data q' V{vFfY%
*/ ot+~|Dl
private void insertSort(int[] data) { rDx],O _
int temp; f93X5hFnF
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); '5,,XhP
} {kRC!}
} e"adkV
} qM:)daS1w
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} j5Wx*~@(
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