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快速排序: T1Z;r*}
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package org.rut.util.algorithm.support; G5aieD.#
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import org.rut.util.algorithm.SortUtil; sjwo/+2
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/** 6vNrBB
* @author treeroot \T :i{.i
* @since 2006-2-2 "wnzo,
* @version 1.0 UK O[r;
*/ p,>5\Zre~
public class QuickSort implements SortUtil.Sort{ hYNY"VB
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/* (non-Javadoc) GyIT{M}KV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6qoyiT%P&
*/ *|>d
public void sort(int[] data) { ;HJLs2bP
quickSort(data,0,data.length-1); *@v)d[z_
} MLje4
private void quickSort(int[] data,int i,int j){ rrqR}}l
int pivotIndex=(i+j)/2; &cHV7
//swap q6SXWT'Sa
SortUtil.swap(data,pivotIndex,j); >eqxV|]i
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int k=partition(data,i-1,j,data[j]); 3z)Kz*xr
SortUtil.swap(data,k,j); r1.nTO%
if((k-i)>1) quickSort(data,i,k-1); 4c$ zKqz
if((j-k)>1) quickSort(data,k+1,j); 1H@>/QC
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} M/ni6%x
/** */|lJm'R
* @param data E^lvbLh'
* @param i ?_$=l1vf
* @param j }Q?c"H!/
* @return P'*)\faw
*/ 36%nB*
private int partition(int[] data, int l, int r,int pivot) { cU@SIJ)
do{ !\i\}feb
while(data[++l] while((r!=0)&&data[--r]>pivot); =Z+nz^'b
SortUtil.swap(data,l,r); 7X q,z
} 8a="/J
while(l SortUtil.swap(data,l,r); 0]=i}wL 8
return l; OK6]e3UO
} rI>aAW'
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} :x{NBvUIc
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改进后的快速排序: 2H6,'JK@F
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package org.rut.util.algorithm.support; x&9hI
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import org.rut.util.algorithm.SortUtil; S<u-n8bv
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/** 2?,EzBeal
* @author treeroot Ikiib
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* @since 2006-2-2 RIE5KCrGB
* @version 1.0 h0-hT
*/ H nUYqhZS
public class ImprovedQuickSort implements SortUtil.Sort { ;SaX;!`39+
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private static int MAX_STACK_SIZE=4096; T2 Y,U {
private static int THRESHOLD=10; %Gj8F4{
/* (non-Javadoc) 1jPJw3"3h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WxJf{=-
*/ wUQw!%?>
public void sort(int[] data) { x{,q]u /
int[] stack=new int[MAX_STACK_SIZE]; @`Eg(
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int top=-1; 4RV%Z!kcD!
int pivot; _5m#2u51i
int pivotIndex,l,r; *gF<m9&
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stack[++top]=0; CQr<N w
stack[++top]=data.length-1;
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while(top>0){ lGk{LO)
int j=stack[top--]; MJCzo |w
int i=stack[top--]; ]f: v,a
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pivotIndex=(i+j)/2; f{i8w!O"~
pivot=data[pivotIndex]; D?,#aB"
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SortUtil.swap(data,pivotIndex,j); jhX[fT1m
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//partition #gaQaUjR
l=i-1; ,i6RE
r=j; k({\/t3i
do{ +|{RE.DL
while(data[++l] while((r!=0)&&(data[--r]>pivot)); #D9e$E(J^
SortUtil.swap(data,l,r); TO*BH^5R
} )VK }m9Ae
while(l SortUtil.swap(data,l,r); 7GSV
SortUtil.swap(data,l,j); 3bd5FsI^pU
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if((l-i)>THRESHOLD){ 9lj!C'
stack[++top]=i; G633Lm`ri
stack[++top]=l-1; xc:!cA{V
} 8?O>ZZtu
if((j-l)>THRESHOLD){ 5,;`$'?a%
stack[++top]=l+1; ~i_Tw#}
stack[++top]=j; r-IVb&uFb
} nL}5cPI
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} !.<T"8BUpv
//new InsertSort().sort(data); A[dvEb;r
insertSort(data); C4#rA.nF|
} vF/ =J
/** $W42vjr4
* @param data %=<IGce
*/ 3q:{1rc
private void insertSort(int[] data) { Q U
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int temp; FNQX7O52
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); ^t*x*m8
} E%TpJl'U
} W"xP(7X
} h2;z4
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} }2r+%V&4
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