#cRw0bn:
=(^-s Jk
快速排序: ]S=AO/'
0Ek+ }`
package org.rut.util.algorithm.support; /s\_"p
2unaK<1s
import org.rut.util.algorithm.SortUtil; MzY~-74aF
.-Xp]>f,
/** HaUfTQ8
* @author treeroot ZM~kc|&
* @since 2006-2-2 PU6Sa-fQ2,
* @version 1.0 APC,p,"
*/ UY!N"[&
public class QuickSort implements SortUtil.Sort{ 5:o$]LkOWC
d? Old
/* (non-Javadoc) q*^F"D:?k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4%3R}-'mh
*/ [9:'v@Ph
public void sort(int[] data) { JFvVRGWB
quickSort(data,0,data.length-1); RKY~[IQ,
} #00k7y>OyD
private void quickSort(int[] data,int i,int j){ hpqM
f z1
int pivotIndex=(i+j)/2; Y}/e"mp
//swap mF?GQls`
SortUtil.swap(data,pivotIndex,j); -666|pA
*/|Vyp-
int k=partition(data,i-1,j,data[j]); 6^oQ8unmS
SortUtil.swap(data,k,j); ZDI%?.U
if((k-i)>1) quickSort(data,i,k-1); soH
M5<U
if((j-k)>1) quickSort(data,k+1,j); 0(Hhb#WDh\
_7O;ED+
} #ZPU.NNT?
/** \;h+:[<e1
* @param data Jx:t(oUR+
* @param i ;-OnCLr
* @param j hSO(s
* @return ,.cNs5[t
*/ WP@IV;i
private int partition(int[] data, int l, int r,int pivot) { 4|Wglri
do{ H.D1|sU
while(data[++l] while((r!=0)&&data[--r]>pivot); f~RS[h`:
SortUtil.swap(data,l,r); !w!}`|q
} 7q' _]$
while(l SortUtil.swap(data,l,r); >z`^Q[
return l; RO([R=.`/
} Z]1=nSv
eu]t.Co[X
} PMdvBOtS`
P?y3YxS
改进后的快速排序: D};zPf@!p
7^fpbrj
package org.rut.util.algorithm.support; lR^OS*v
rT2gX^Mj&
import org.rut.util.algorithm.SortUtil; Z=B6fu*
fcuU,A
/** VPKoBJ&
* @author treeroot Nvlfi8.
* @since 2006-2-2 $ylQ \Y'
* @version 1.0 P~>E
*/ 6%p$C
oR
public class ImprovedQuickSort implements SortUtil.Sort { ^&AhWm7\
FAS+*GFz
private static int MAX_STACK_SIZE=4096; 1;\A./FVv
private static int THRESHOLD=10; &?],uHB?d
/* (non-Javadoc) QJcaOXyMS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zH1pW(
*/ 5kK:1hH7
public void sort(int[] data) { gbf-3KSp^
int[] stack=new int[MAX_STACK_SIZE]; MpV3.
%7X<:f|N8x
int top=-1; \WDL?(G<
int pivot; $Vi[195]2
int pivotIndex,l,r; T,Bu5:@#
=aWj+ggd@
stack[++top]=0; [|=#~(yYQ
stack[++top]=data.length-1; ,s%1#cbR
e~#"#?
while(top>0){ pT90TcI2
int j=stack[top--]; xm)s%"6n
int i=stack[top--]; 1N`1~y
Br}&
pivotIndex=(i+j)/2; t8"*jt
pivot=data[pivotIndex]; )YDuq(g&
+s*OZ6i [
SortUtil.swap(data,pivotIndex,j); %TY;}V59 b
WcCJ;z:S?k
//partition !n=?H1@
l=i-1; J3]W2m2Zw
r=j; ECO4ut.d
do{ F/"Q0% (m
while(data[++l] while((r!=0)&&(data[--r]>pivot)); "Ih>>|r
SortUtil.swap(data,l,r); >q'xW=Y
j\
} 3f u*{8.XZ
while(l SortUtil.swap(data,l,r); 6 9 PTo
SortUtil.swap(data,l,j); 'f#i@$|]
+<G |Ru-
if((l-i)>THRESHOLD){ gaK m`#
stack[++top]=i; @}
nI$x.
stack[++top]=l-1; j|`6[93MG
} sHqs)@D
if((j-l)>THRESHOLD){ fpjy[$8
stack[++top]=l+1; 6m.ChlO/
stack[++top]=j; *4i)aj
} Quc,,#u
yGNZw7^(
} 7,i}M
//new InsertSort().sort(data); &C~R*
insertSort(data); N1lhlw6
} b8?qYm
/** vyME
* @param data oD$8(
*/ *K9I+t"g
private void insertSort(int[] data) { U4DQ+g(A
int temp; 0W asE1t|
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); [-Zp[
} E+Jh4$x{
} 4G:I VK9
} ^i"C%8
9,?\hBEu
} vybQ}dscn
T 4}SF