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快速排序: 06N}k<10O
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package org.rut.util.algorithm.support; X@LRsg
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import org.rut.util.algorithm.SortUtil; R)RG[F#
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/** o8-^cP1
* @author treeroot @]-jl}:]
* @since 2006-2-2 \0vr>C
* @version 1.0 )Cc q4i
*/ f'VX Y-
public class QuickSort implements SortUtil.Sort{ }7
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/* (non-Javadoc) zBk'{[y9L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {yB&xj[z
*/ #R.-KUW:
public void sort(int[] data) { /x[jQM\
quickSort(data,0,data.length-1); 5&q8g;XiEM
} B3
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private void quickSort(int[] data,int i,int j){ m/y2WlcRx
int pivotIndex=(i+j)/2; 8'4S8DM
//swap }` ! =
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SortUtil.swap(data,pivotIndex,j); JAX*hGhkh
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int k=partition(data,i-1,j,data[j]); ?`#/ 8PN
SortUtil.swap(data,k,j); ,}))u0q+:
if((k-i)>1) quickSort(data,i,k-1); yRfSJbzaf\
if((j-k)>1) quickSort(data,k+1,j); KjE+QUa
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} <RG|Dx[:=
/** DFd%9*N
* @param data NF0%}II&xK
* @param i 8peDI7[|
* @param j 7El[ >
* @return q11>f
*/ Jh?dw3Ai^
private int partition(int[] data, int l, int r,int pivot) { LM-J !44
do{ p-/|mL
while(data[++l] while((r!=0)&&data[--r]>pivot); 45MLt5^|
SortUtil.swap(data,l,r); ,J{ei7TN
} cvfr)K[0
while(l SortUtil.swap(data,l,r); ],JEBt
return l; 7e#?e+5+A
} D*F4it.
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} =IW?WIXk
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改进后的快速排序: )Ib<F7v
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package org.rut.util.algorithm.support; h0g:@ae%&
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import org.rut.util.algorithm.SortUtil; u*tN)f3
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/** v{jQek4
* @author treeroot S<WdZ=8sA
* @since 2006-2-2 I]Dl /
* @version 1.0 we;G]`@?
*/ ,XIz?R>;c
public class ImprovedQuickSort implements SortUtil.Sort { xgNJ eQ
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private static int MAX_STACK_SIZE=4096; nZ@&2YPlem
private static int THRESHOLD=10; 8&3V#sn'
/* (non-Javadoc) w[!^;#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gUpb4uN
*/ .$%Soyr?,
public void sort(int[] data) { 4)"n
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int[] stack=new int[MAX_STACK_SIZE]; 'C
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int top=-1; 1}:bqI.<W
int pivot; f3H ed
int pivotIndex,l,r;
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stack[++top]=0; L\&<sy"H
stack[++top]=data.length-1; MwR0@S}*
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while(top>0){ .Y3pS/VI
int j=stack[top--]; ywb4LKD
int i=stack[top--]; a e*Mf7
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pivotIndex=(i+j)/2; HKqwE=NZ
pivot=data[pivotIndex]; ld^=#]g
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SortUtil.swap(data,pivotIndex,j); rSHpS`\ou
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//partition |d*&y#kV
l=i-1; 4&_NJ\
r=j; |pmZ.r
do{
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while(data[++l] while((r!=0)&&(data[--r]>pivot)); `S2[5i
SortUtil.swap(data,l,r); &p}$J)q
} n%k!vJ)]
while(l SortUtil.swap(data,l,r); H~+ l7OhV
SortUtil.swap(data,l,j); awOd_![c'
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if((l-i)>THRESHOLD){ 0\:(ageY?
stack[++top]=i; 't_[dSO
stack[++top]=l-1; ;Ww7"-=sw
} FRS>KO=3
if((j-l)>THRESHOLD){ {2+L@
stack[++top]=l+1; Mnz!nWhk
stack[++top]=j; ;w%*M}`5
} 59!Fkd3
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} e89Xb;;w
//new InsertSort().sort(data); ,Vh{gm1
insertSort(data); ^ mS
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} |6(ZD^w
/** B"v.*
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* @param data uFLx
*/ nIoPC[%_
private void insertSort(int[] data) { `8I&7c
int temp; un=2}@ '
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); Oer^Rk
} .>mr%#p
} K\$J4~EtG
} .{=$!8|&I9
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} ,uPJ_oZs
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