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快速排序: mtFC H
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package org.rut.util.algorithm.support; %j2 :W\g:
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import org.rut.util.algorithm.SortUtil; sn[<Lq
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/** Rz>@G>b:
* @author treeroot aAu%QRq
* @since 2006-2-2 (8S+-k?
* @version 1.0 4nd)*0{f
*/ >PWDo
public class QuickSort implements SortUtil.Sort{ :`yW^b
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/* (non-Javadoc) KdlUa^}D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %MtaWZ
*/ :q1j?0{2N
public void sort(int[] data) { bneP>Bd
quickSort(data,0,data.length-1); A{{rNbCK
} Z~
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private void quickSort(int[] data,int i,int j){ 0n{+_
int pivotIndex=(i+j)/2; =v !8i
//swap '&AeOn
SortUtil.swap(data,pivotIndex,j); J=t}N+:F`b
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int k=partition(data,i-1,j,data[j]); S ="\ S
SortUtil.swap(data,k,j); OlW5k`B
if((k-i)>1) quickSort(data,i,k-1); 5?#AS#TD'
if((j-k)>1) quickSort(data,k+1,j); SX?hu|g_r
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} U z)G Y
/** U&+lw=
* @param data FGMYpapc~
* @param i QSYKYgxC
* @param j `+(JwQC4
* @return EffU-=?%!
*/ }z-)!8vF
private int partition(int[] data, int l, int r,int pivot) { kzKQ5i $G
do{ wuqB['3
while(data[++l] while((r!=0)&&data[--r]>pivot); dm83YCdL
SortUtil.swap(data,l,r); jA3Ir;a
} <UwA5X`0e.
while(l SortUtil.swap(data,l,r); *q1sM#;5
return l; KH$o X\v
} d$D3iv^hyx
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} ui*CA^ Y
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改进后的快速排序: #=fd8}9
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package org.rut.util.algorithm.support; v Dph}Z
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import org.rut.util.algorithm.SortUtil; n
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/** A@EUH
* @author treeroot 9jUm0B{?
* @since 2006-2-2 {bp~_`O
* @version 1.0 @rW%*?$7
*/ w`Z@|A
public class ImprovedQuickSort implements SortUtil.Sort { H? pWyc<,
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private static int MAX_STACK_SIZE=4096; `yb,z
private static int THRESHOLD=10; :e4[isI
/* (non-Javadoc) g5~1uU$O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ")qO#b4
*/ J$Ba*`~!!
public void sort(int[] data) { 4[LzjC
int[] stack=new int[MAX_STACK_SIZE]; L_YY,
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int top=-1; q1M16qv5
int pivot; CY8=prC
int pivotIndex,l,r; 0'y3iar
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stack[++top]=0; 9y"\]G77E
stack[++top]=data.length-1; ?37Kc,o
r`=!4vY2
while(top>0){ !7kca#,X
int j=stack[top--]; N5GQ2V
int i=stack[top--]; -}<W|r
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pivotIndex=(i+j)/2; y$pT5X G
pivot=data[pivotIndex]; Ll6|Wh X
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SortUtil.swap(data,pivotIndex,j); D\GP+Ota
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//partition ^,Y#_$oR
l=i-1; @GR|co
r=j; $zV[-d
do{ &AlX).
while(data[++l] while((r!=0)&&(data[--r]>pivot)); yu62$d
SortUtil.swap(data,l,r); c_bIadE{
} 0~N2MoOl^
while(l SortUtil.swap(data,l,r); 5eSmyj-W
SortUtil.swap(data,l,j); &mp@;wI6@
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if((l-i)>THRESHOLD){ A
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stack[++top]=i; e?~6HP^%.
stack[++top]=l-1; z+B"RV
} <P1sK/IZb
if((j-l)>THRESHOLD){ i;B)@op.#
stack[++top]=l+1; s5ddGiZnBT
stack[++top]=j; hGvuA9d~
} 8MPXrc,9-
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} +3D3[.n
//new InsertSort().sort(data); s4c2
insertSort(data); _[.3I1kG
} PYz^9Ud 6g
/** ra k@oW]
* @param data qS|t7*
*/ sIh,@b
private void insertSort(int[] data) { 7*r7Q'
int temp; $n?@zd@53
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); ,;yiV<AD
} OL|UOG
} "(rG5z3P
} NrdbXPHceN
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} {` Lem
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