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快速排序: MnTqWC90
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package org.rut.util.algorithm.support; ,pIaYU{D
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import org.rut.util.algorithm.SortUtil; UTVqoCHA
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/** ,'%*z
* @author treeroot $ Gs|Z$(
* @since 2006-2-2 En{<
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* @version 1.0 &0RKNpwg
*/ @ +yjt'B
public class QuickSort implements SortUtil.Sort{
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/* (non-Javadoc) :aR_f`KMm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 46D_K
*/ n'83P%x
public void sort(int[] data) { *T2kxN,Ik
quickSort(data,0,data.length-1); ^_t7{z%sA[
} hVW1l&s
private void quickSort(int[] data,int i,int j){ K>_~|ZN1C8
int pivotIndex=(i+j)/2; o[aIQ|G
//swap B8>3GZi
SortUtil.swap(data,pivotIndex,j); %mRnJgV5k
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int k=partition(data,i-1,j,data[j]); 1AQ3<
SortUtil.swap(data,k,j); I[KAW"
if((k-i)>1) quickSort(data,i,k-1); OjsMT]
if((j-k)>1) quickSort(data,k+1,j); E=]$nE]b
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} <q:2' 4o
/** R'$1,ie
* @param data $|VD+[jSV
* @param i grE'ySX0
* @param j o,!W,sx_
* @return t: 03
*/ zU";\);
private int partition(int[] data, int l, int r,int pivot) { q OV$4[r
do{ !RwMUnp
while(data[++l] while((r!=0)&&data[--r]>pivot); rTzXRMv@o
SortUtil.swap(data,l,r); :?:R5_Nd=
} Q&vU|y
while(l SortUtil.swap(data,l,r); :oytJhxU
return l; H,;9' *84
} $?y\3GX
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} USV;j%U4*
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改进后的快速排序: ' pfkbmJ
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package org.rut.util.algorithm.support; :8Ugz ~i
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import org.rut.util.algorithm.SortUtil; KNSMx<GP
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/** K}QZdN']
* @author treeroot ?GGBDql
* @since 2006-2-2 7@Xi*Azd
* @version 1.0 e|4U2\&3y
*/ /\m>PcPa
public class ImprovedQuickSort implements SortUtil.Sort { UxvT|~"
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private static int MAX_STACK_SIZE=4096; K%YR; )5A
private static int THRESHOLD=10; &,'CHBM
/* (non-Javadoc) .F@ 2C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 35Fs/Gf-n
*/ v4r%'bA
public void sort(int[] data) { i)@H
int[] stack=new int[MAX_STACK_SIZE]; bl[2VM7P
{
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int top=-1; W"H(HA
int pivot; 4B@Ir)^(*
int pivotIndex,l,r; 1(qL),F;
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stack[++top]=0; qTV.DCP
stack[++top]=data.length-1; moE!~IroG
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while(top>0){ ?:#$btmn?
int j=stack[top--]; vpoJ{TPO
int i=stack[top--]; RH"EO4
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pivotIndex=(i+j)/2; #{zF~/Qq
pivot=data[pivotIndex]; F<(?N!C?@
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SortUtil.swap(data,pivotIndex,j); Duq.`XO
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//partition xn}HB
l=i-1; MG4(,"c!
r=j; 2 P9{?Y
do{ Rzxkz
while(data[++l] while((r!=0)&&(data[--r]>pivot)); ]
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SortUtil.swap(data,l,r); %[fZ@!B
} 0|FQIhVuY
while(l SortUtil.swap(data,l,r); goc"+K
SortUtil.swap(data,l,j); m>+e;5
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if((l-i)>THRESHOLD){ >7 qZ\#
stack[++top]=i; Yw,LEXLY
stack[++top]=l-1; +kT
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} e.]k4K
if((j-l)>THRESHOLD){ @WP%kX.?
stack[++top]=l+1; 5/i]Jni
stack[++top]=j; )`}4rD^b
} zX&wfE8T
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} lA,*]Mr~
//new InsertSort().sort(data); XVYj
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insertSort(data); HQV#8G#B
} n(jrK9]
/** >0I\w$L
* @param data ykNPKzW:
*/ =5#sB*
private void insertSort(int[] data) { "^5 %g%
int temp; n4
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for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); n hGh5,
} {r1}ACw{
} lVS.XQ2<
} AmBLZ<f;
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} pxHJX2
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