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快速排序: ]0v;;PfVl6
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package org.rut.util.algorithm.support; ,=sbK?&
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import org.rut.util.algorithm.SortUtil; q#LB 2M
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/** ^u'hl$`^
* @author treeroot "XPBNv\>_
* @since 2006-2-2 ,b[}22
* @version 1.0 5ncjv@Aa
*/ *+(t2!yFmE
public class QuickSort implements SortUtil.Sort{ UNLmnj;-Q
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/* (non-Javadoc) WP7RX|7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eu=G[>
*/ :"m~tU3&
public void sort(int[] data) { (w4w
quickSort(data,0,data.length-1); 48%-lkol)
} oh*Hzb
private void quickSort(int[] data,int i,int j){ n>Cl;cN=
int pivotIndex=(i+j)/2; +c)"p4m
//swap `=m[(CLb
SortUtil.swap(data,pivotIndex,j); u#(&
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int k=partition(data,i-1,j,data[j]); m]H[$Q
SortUtil.swap(data,k,j); OAigq6[,
if((k-i)>1) quickSort(data,i,k-1); Zop3[-
if((j-k)>1) quickSort(data,k+1,j); x)evjX=q
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} V11(EZJ/j
/** NUxOU>f
* @param data 1.S7MSpTV
* @param i 6 3TeTGp$
* @param j Xjb 4dip
* @return 8yW 8F26
*/ wyzx9`5~d
private int partition(int[] data, int l, int r,int pivot) { R7)\wP*l5
do{ 5zk<s`h
while(data[++l] while((r!=0)&&data[--r]>pivot); E :gS*tsY
SortUtil.swap(data,l,r); w+A:]SU
} Skb,cKU
while(l SortUtil.swap(data,l,r); 5L ]TV\\
return l; [3$L}m
} H CBZ*Z-
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} "ijpqI
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改进后的快速排序: \9;SOA v
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package org.rut.util.algorithm.support; j^4KczJl
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import org.rut.util.algorithm.SortUtil; RYhaQ&1i
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/** a[e&O&Z
* @author treeroot N$'/J-^
* @since 2006-2-2 2!-?
* @version 1.0 Q1ox<-
*/ 7RXTQ9BS
public class ImprovedQuickSort implements SortUtil.Sort { ~\vGwy
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private static int MAX_STACK_SIZE=4096; jM<=>P
private static int THRESHOLD=10; /"~ D(bw0=
/* (non-Javadoc) ZtzSG@f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QuF76&)7
*/ Xk2M.:3`
public void sort(int[] data) { {?2jvv
int[] stack=new int[MAX_STACK_SIZE]; MHF31/g\
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int top=-1; !v/j*'L<M}
int pivot; O$dcy!
int pivotIndex,l,r; Mn)>G36(
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stack[++top]=0; "h@|XI
stack[++top]=data.length-1; qcN{p7=0
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while(top>0){ ~*R:UTBtw
int j=stack[top--]; s,5SWdb\v
int i=stack[top--]; 3HtLD5%Q
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pivotIndex=(i+j)/2; U,G!u =+
pivot=data[pivotIndex]; uj8G6'm%
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SortUtil.swap(data,pivotIndex,j); i|`b2msvd
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//partition _'eG
l=i-1; |)%]MK$;
r=j; @k<
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do{ BIu%A]e"
while(data[++l] while((r!=0)&&(data[--r]>pivot)); v~l_6V}
SortUtil.swap(data,l,r); *
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} *.'9 eC0s
while(l SortUtil.swap(data,l,r); jCJbmEfo9@
SortUtil.swap(data,l,j); <5Ye')+
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if((l-i)>THRESHOLD){ S\\3?[!p
stack[++top]=i; gKp5*
stack[++top]=l-1; ZQL4<fy'E
} '
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if((j-l)>THRESHOLD){ \>B$x@-wg
stack[++top]=l+1; t^8ii
stack[++top]=j; Nu/D$m'PY
} fG *1A\t]
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} 4yZ'+\ +I
//new InsertSort().sort(data); E?VPCx
insertSort(data); 0r4,27w
} &1=Je$,
/** rLkUIG
* @param data 9EPE.+ns
*/ v jTs[eq>
private void insertSort(int[] data) { YsX&]4vzm
int temp; >DFpL$oP
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); n;Nr[hI
} nZ4JI+Q)~
} +%O_xqq
} ">8]Oi;g
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} i8h(b2odQ
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