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快速排序: \ZOH3`vq
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package org.rut.util.algorithm.support; San=E@3}v!
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import org.rut.util.algorithm.SortUtil; yF _@^V
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/** q^I/
* @author treeroot en5sqKqh+
* @since 2006-2-2 NCXr$ES{
* @version 1.0 TV['"'D&i
*/ }|Ao@UvH
public class QuickSort implements SortUtil.Sort{ 2_i9
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/* (non-Javadoc) NI%&Xhn!*>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J%
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*/ O} &%R:
public void sort(int[] data) { 3=
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quickSort(data,0,data.length-1); `w;8xD(
} drM@6$k
private void quickSort(int[] data,int i,int j){ {\P`-'C
int pivotIndex=(i+j)/2; c*@#0B
//swap MT3TWWtZ:
SortUtil.swap(data,pivotIndex,j); =.Hq]l6+
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int k=partition(data,i-1,j,data[j]); l_MF9.z&
SortUtil.swap(data,k,j); 2C&G'@>
if((k-i)>1) quickSort(data,i,k-1); GdlzpBl
if((j-k)>1) quickSort(data,k+1,j); -,Oq=w*EV
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} 2d:5~fEJp
/** *Bm7>g6
* @param data 6!;eJYj,
* @param i q; n
* @param j "{@Q..hxC
* @return &|
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*/ |n/qJIE6
private int partition(int[] data, int l, int r,int pivot) { |GLh|hr
do{ vUNmN2pRJ
while(data[++l] while((r!=0)&&data[--r]>pivot); })#SjFq<V
SortUtil.swap(data,l,r); ..=WG@>$+
} Af`qe+0E
while(l SortUtil.swap(data,l,r); ER'zjI>t@
return l; "N*bV
} \8}!aTC
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} Pqtk1=U
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改进后的快速排序: c*~/`lG
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package org.rut.util.algorithm.support; u &qFE=5:
6 *GR_sMm
import org.rut.util.algorithm.SortUtil; %%c1@2G<
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/** Q/2(qD; u
* @author treeroot k7cM.<s!
* @since 2006-2-2 \}p!S$`
* @version 1.0 G<_<j}=
*/ m5'nqy F
public class ImprovedQuickSort implements SortUtil.Sort { {S6:LsFfm
0hB9D{`,{
private static int MAX_STACK_SIZE=4096; ^8q(_#w`K
private static int THRESHOLD=10; M. o}?
/* (non-Javadoc) L8WYxJ
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t8:QK9|1
*/ W)z@>4`Bb
public void sort(int[] data) { IJQ"
*;
int[] stack=new int[MAX_STACK_SIZE]; H~ `JAplr
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int top=-1; g[%^OT#
int pivot; ~^ <1k-
int pivotIndex,l,r; >&Ios<67g
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stack[++top]=0; ,CED%
stack[++top]=data.length-1; vLT$oiN[c
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while(top>0){ r
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int j=stack[top--]; q?0&&"T}
int i=stack[top--]; AL{r/h
SF.Is=b
pivotIndex=(i+j)/2; h( V:-D
pivot=data[pivotIndex]; $sS;#r0
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SortUtil.swap(data,pivotIndex,j); Gzw9E.Hk
WFm\ bZ.
//partition 3X:)r<
l=i-1; 7)zF8V
r=j; sBq6,Iu
do{ |?\J,h
while(data[++l] while((r!=0)&&(data[--r]>pivot)); c_ Dg0
SortUtil.swap(data,l,r); '?O_(%3F0
} +LhV4@zC
while(l SortUtil.swap(data,l,r);
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SortUtil.swap(data,l,j); \C &V)/
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if((l-i)>THRESHOLD){ Usl963A#'F
stack[++top]=i; w,!IvDCAw
stack[++top]=l-1; 08MY=PC~R
} L )53o!
if((j-l)>THRESHOLD){ bB+ 4
stack[++top]=l+1; FnWN]9
stack[++top]=j; G<W;HM j2
} ,vcd>"PK
h]>7Dl]
} 9NC?J@&B
//new InsertSort().sort(data); +cwuj
insertSort(data); ,JqCxb9
} Yow
/** Msst:}QY
* @param data OVUJiBp
*/ *b,4qMr
private void insertSort(int[] data) { ;2}wrX
int temp; .X\9vVJ
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); B*OBXN>'P
} a&!K5(
} MRN=-|fV^
} ddzMwucjp
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} d=eIsP'h
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