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快速排序:
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package org.rut.util.algorithm.support; n[tES6u
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import org.rut.util.algorithm.SortUtil; ,I^:xw_
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/** uX8yS|= *
* @author treeroot ]s<}'&
* @since 2006-2-2 A{,ZfX;SPO
* @version 1.0 ,3p$Z
*/ o@j)clf
public class QuickSort implements SortUtil.Sort{ ;:#g\|(<+
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/* (non-Javadoc) S3F8Chk5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]aqg{XdGt
*/ pj/w9j G6
public void sort(int[] data) { ML-?#jNa<
quickSort(data,0,data.length-1); SU80i`
} G}ccf%
private void quickSort(int[] data,int i,int j){ jc-$l
int pivotIndex=(i+j)/2; wD|I^y;
//swap =lG/A[66
SortUtil.swap(data,pivotIndex,j); {(j1#9+9
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int k=partition(data,i-1,j,data[j]); b9cY
SortUtil.swap(data,k,j); 6E0{(*
if((k-i)>1) quickSort(data,i,k-1); ie9,ye"
if((j-k)>1) quickSort(data,k+1,j); *C"-$WU3o
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} JVawWw0q
/** :0'2m@x~
* @param data dRu|*s
* @param i G
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* @param j {-Q=Y DR
* @return i3v|r 0O~L
*/ TF7~eyLg
private int partition(int[] data, int l, int r,int pivot) { 7'1 +i
do{ jt,dr3|/n
while(data[++l] while((r!=0)&&data[--r]>pivot); X\
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SortUtil.swap(data,l,r); H(,D5y`k1
} V3t;V-Lkt
while(l SortUtil.swap(data,l,r); 2B`#c}PP
return l; 6&KvT2?tA`
} j]5mzz~
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} d&apu{
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改进后的快速排序: +:jx{*}jo
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package org.rut.util.algorithm.support; GT3?)g{Z
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import org.rut.util.algorithm.SortUtil;
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/** K]s*rPT/,
* @author treeroot ,"U_oa3
* @since 2006-2-2 oasEG6OI8
* @version 1.0 Eu)(@,]we
*/ 3rh@|fg)E
public class ImprovedQuickSort implements SortUtil.Sort { [t }\8^y
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private static int MAX_STACK_SIZE=4096; OD~B2MpM>
private static int THRESHOLD=10; x!RpRq9
/* (non-Javadoc) SE;Yb'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I?Fv!5p
*/ yG..B
public void sort(int[] data) { V_p[mSKJv
int[] stack=new int[MAX_STACK_SIZE]; g*%z{w
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int top=-1; 6Qh@lro;y
int pivot; U,e'vS{
int pivotIndex,l,r; "2
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stack[++top]=0; 6X`i*T$.
stack[++top]=data.length-1; 4k4 d%
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while(top>0){ ' En|-M5
int j=stack[top--]; DLBHZ?+!
int i=stack[top--]; C0v1x=(xiM
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pivotIndex=(i+j)/2; ]sL)[o
pivot=data[pivotIndex]; K#_x.:<J
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SortUtil.swap(data,pivotIndex,j); Oiz@tEp=_
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//partition _j Ck)3KO
l=i-1; >.4mAO
r=j; |'ML
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do{ Tc.k0n%W:b
while(data[++l] while((r!=0)&&(data[--r]>pivot)); ~8l(,N0
SortUtil.swap(data,l,r); .`@)c/<0
} p^>_VE[S
while(l SortUtil.swap(data,l,r); m?)REE
SortUtil.swap(data,l,j); {>rGe#Vu
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if((l-i)>THRESHOLD){ {$H-7-O$
stack[++top]=i; Ww)p&don
stack[++top]=l-1; OJ!=xTU%h
} sfKu7p uc
if((j-l)>THRESHOLD){ (Xv'Te?
stack[++top]=l+1; 4SDUTRoa
stack[++top]=j; SSo7
U
} bpp{Z1/4
K}e:zR;;^
} ckhU@C|=*
//new InsertSort().sort(data); E8LA+dKN:
insertSort(data); F(}~~EtPHo
} CaE1h9
/** RJhafUJ zH
* @param data OPe3p {]
*/ h}$g}f%$+
private void insertSort(int[] data) { :)=>,XwL8
int temp; R;l;;dC=
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); l\t\DX"s_
} '^10sf`"
} YDxEWK<
} 1r?hRJ:'
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} u(W+hdTap=
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