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快速排序: (8=Zr0He
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package org.rut.util.algorithm.support; oVc_(NH-
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import org.rut.util.algorithm.SortUtil; X@|
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/** bG2!5m4L
* @author treeroot ?=Ma7 y
* @since 2006-2-2 "b-6kM
* @version 1.0 R:^GNra;
*/ l}:9)nXA{
public class QuickSort implements SortUtil.Sort{ F
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/* (non-Javadoc) U{i9h6b"18
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {U-VInu
*/ c @2s!bs
public void sort(int[] data) { l$zo3[
quickSort(data,0,data.length-1); LR-op?W
} 33"{"2==`
private void quickSort(int[] data,int i,int j){ ;rd!kFd#bq
int pivotIndex=(i+j)/2; x<9|t(
//swap -!wm]kx
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SortUtil.swap(data,pivotIndex,j); {#>@h7
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int k=partition(data,i-1,j,data[j]); V,
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SortUtil.swap(data,k,j); Z{u*vUC&
if((k-i)>1) quickSort(data,i,k-1); VpTp*[8O
if((j-k)>1) quickSort(data,k+1,j); Jw;J$
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} ffuV$#
/** h2h$UZIv
* @param data V1#/+~
* @param i t=A|
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* @param j -I\_v*nA
* @return mIl^
*/ IE'OK
private int partition(int[] data, int l, int r,int pivot) { 1Voo($q.
do{ ?A,gDk/#
while(data[++l] while((r!=0)&&data[--r]>pivot); d~GT w:
SortUtil.swap(data,l,r); nCXIWLw
} o?/N4$&5l
while(l SortUtil.swap(data,l,r); 9Z7o?S";
return l; )h>Cp,|{
} [x-Z)Q.5
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} C.pNDpx-
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改进后的快速排序: G8akMd]2
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package org.rut.util.algorithm.support; y~p7&^FeR
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import org.rut.util.algorithm.SortUtil; Hsx`P
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/** _3hCu/BV
* @author treeroot D[;6xJ
* @since 2006-2-2 iK=H9j
* @version 1.0 .:_dS=ut
*/ 3vVhE,1N
public class ImprovedQuickSort implements SortUtil.Sort { F
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private static int MAX_STACK_SIZE=4096; DRf~l9f
private static int THRESHOLD=10; p5G O@^i
/* (non-Javadoc) 4?72TBl]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fN8A'p[
*/ h/eKVRGs"
public void sort(int[] data) { kwZC3p\\
int[] stack=new int[MAX_STACK_SIZE]; fs~n{z,ja%
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int top=-1; Njz,y}\
int pivot; Oh<Z0M)
int pivotIndex,l,r; `=%[
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stack[++top]=0; '2:Ily,S@
stack[++top]=data.length-1; }6m5MH$7q
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while(top>0){ ,|xG2G6
int j=stack[top--]; wF3mQ_hv:@
int i=stack[top--]; NjsP"
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pivotIndex=(i+j)/2; QF[9Zn
pivot=data[pivotIndex];
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SortUtil.swap(data,pivotIndex,j); ,7/un8:%c
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//partition gh i!4
l=i-1; OkA-=M)RI:
r=j; *% uv7G@%N
do{ MeP U`M--
while(data[++l] while((r!=0)&&(data[--r]>pivot)); OdwSNG
SortUtil.swap(data,l,r); +<bq@.x
} McH*J j
while(l SortUtil.swap(data,l,r); D95$
SortUtil.swap(data,l,j); XD%?'uUQ_
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if((l-i)>THRESHOLD){ ;#fB=[vl";
stack[++top]=i; nb0<.ICF%R
stack[++top]=l-1; 5g/^wKhKG
} K2:r7f
if((j-l)>THRESHOLD){ ]DC]=F.
stack[++top]=l+1; rv|k8
stack[++top]=j; "eh"'Z
} ?R"5 .3
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} /x-Ja[kL
//new InsertSort().sort(data); UkXc7D^jwm
insertSort(data); ><`.(Z5c
} N]+x@M @^3
/** EsA^P2?_+
* @param data Q7c_;z_
*/ bp$8hUNYz-
private void insertSort(int[] data) { ?_n.B=H`8
int temp; },[S 9I`p
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); uvD6uIW<
} %,~; w0
} G.B^C)guu
} $.V(_
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} [.dNX
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