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快速排序: o0:RsODl
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package org.rut.util.algorithm.support; {#4F}@Q
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import org.rut.util.algorithm.SortUtil; vKmV<*K
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/** ^K'@W
* @author treeroot yw+LT,AQ.
* @since 2006-2-2 )>U7+ Me
* @version 1.0 MC;2.e`
*/ E8]kd
public class QuickSort implements SortUtil.Sort{ k?;B1D8-n
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/* (non-Javadoc) fKOC-%w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ![j?/376
*/ IcP\#zhEv
public void sort(int[] data) { &*8_ w-
quickSort(data,0,data.length-1); VQwF9Iq]`
} Z=j6c"
private void quickSort(int[] data,int i,int j){ o3=pxU*
int pivotIndex=(i+j)/2; =WM^i86
//swap 5V@c~1\
SortUtil.swap(data,pivotIndex,j); 'j(F=9)
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int k=partition(data,i-1,j,data[j]); yttaZhK^u
SortUtil.swap(data,k,j); kBg8:bo~
if((k-i)>1) quickSort(data,i,k-1); EE$\8Gx']!
if((j-k)>1) quickSort(data,k+1,j); *Sp_s_tS
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} T1=T
/** ZfP$6%;_
* @param data G_/DzJBF
* @param i (]N- HN]v
* @param j qPF`=#
* @return cogIkB&Ju
*/ T1#r>3c\
private int partition(int[] data, int l, int r,int pivot) { :kQydCuK
do{ NWS3-iZ|8
while(data[++l] while((r!=0)&&data[--r]>pivot); < wi9
SortUtil.swap(data,l,r); m6Mko2
} t4v@d
while(l SortUtil.swap(data,l,r); @jY=b<
return l; h'ik19
} v8f1o$R
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} V;29ieE!
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改进后的快速排序: w?:tce
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package org.rut.util.algorithm.support; ?!HU$>
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import org.rut.util.algorithm.SortUtil; u N8RG_Mb
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/** `Vl9/IEk
* @author treeroot vb`R+y@
* @since 2006-2-2 Ake@krh>$
* @version 1.0 SNtk1pG>
*/ 5Deo}(3
public class ImprovedQuickSort implements SortUtil.Sort { ez<V
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private static int MAX_STACK_SIZE=4096; g5:?O,?
private static int THRESHOLD=10; 'S%H"W\
/* (non-Javadoc) {hFH6]TA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sOVU>tb\'
*/ Kk`LuS?
public void sort(int[] data) { \zKO5,qw
int[] stack=new int[MAX_STACK_SIZE]; +\]Gu(z<
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int top=-1; DS=$*
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int pivot; `vZX"+BAh
int pivotIndex,l,r; #MFIsx)r
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stack[++top]=0; lhC hk7l
stack[++top]=data.length-1; iD*L<9
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while(top>0){ $C{,`{=
int j=stack[top--]; pO92cGJ8
int i=stack[top--]; LU/;`In
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pivotIndex=(i+j)/2; jn(%v]
pivot=data[pivotIndex]; F1meftK
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SortUtil.swap(data,pivotIndex,j); J6Vx7
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//partition !<24Cy
l=i-1; 0X3yfrim
r=j; UmR4zGM}
do{ 2Qt!JXC
while(data[++l] while((r!=0)&&(data[--r]>pivot)); ~7anj.
SortUtil.swap(data,l,r); "hi03k
} %=!] 1
while(l SortUtil.swap(data,l,r); u'nQC*iJb
SortUtil.swap(data,l,j); hd6O+i
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if((l-i)>THRESHOLD){ %&S9~E
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stack[++top]=i; 2VzYP~Jg
stack[++top]=l-1; #q4uS~
} df!i}L
if((j-l)>THRESHOLD){ ^t:dcY7
stack[++top]=l+1; 2RQ-L
stack[++top]=j; PV:J>!]
} >n^780S|
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} A=3L_
#nO
//new InsertSort().sort(data); :bm%f%gg
insertSort(data); vA}_x7}n(
} 4jt(tZS
/** mRa\ wEg%
* @param data 0<O()NMv
*/ T+^c=[W
private void insertSort(int[] data) { c]zFZJ6M
int temp; 3{fg3?
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); W.NZ%~|+e/
} z0OxJ e
} c_8<N7 C
} A;
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} sQe
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