[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; r~t`H*C)}
} _M&TT]a
int i1=l; n/+X3JJ
int i2=mid+1; ~~tTr$
for(int cur=l;cur<=r;cur++){ ,,'jyqD
if(i1==mid+1) H}^'
data[cur]=temp[i2++]; +I3jI <
else if(i2>r) :v&[!
data[cur]=temp[i1++]; SS=<\q#MS
else if(temp[i1] data[cur]=temp[i1++]; >cu%Cs=m
else t'eqk#rq
data[cur]=temp[i2++]; ,ks2&e
} ,=:K&5mCv
} +$dJA
z%;plMj
} iC gZ3M]
kQ`tY`3F
改进后的归并排序: LKIMT
xM*_1+<dT$
package org.rut.util.algorithm.support; B$4*U"tk
Q`ua9oIJ=
import org.rut.util.algorithm.SortUtil; ^SdF\uk{?6
?+yr7_f3*
/** mmAm@/
* @author treeroot _pvB$&
* @since 2006-2-2 9%!h/m>rW
* @version 1.0 [GLH8R
*/ > H!sD\b
public class ImprovedMergeSort implements SortUtil.Sort { aF{_"X2
4T@:_G2b
private static final int THRESHOLD = 10; ]?eZDf~
CdolZW-!"
/* f98,2I(>`+
* (non-Javadoc) |VBt:dd<
* Yh":>~k?SY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {ZJO5*
*/ m|a9T#B(
public void sort(int[] data) { :RaQ =C
int[] temp=new int[data.length]; C"{^wy{sL
mergeSort(data,temp,0,data.length-1); aAo|3KCs
} _Cmmx`ln
( ;FxKm<P@
private void mergeSort(int[] data, int[] temp, int l, int r) { DJP6Z
int i, j, k; 2;}leZ@U
int mid = (l + r) / 2; ~6[?=mOi'
if (l == r) p@<Q?
return; &OMlW_FHR
if ((mid - l) >= THRESHOLD) V>@[\N[
mergeSort(data, temp, l, mid); o-,."|6
else YB#fAU
insertSort(data, l, mid - l + 1); =$>=EBH,cm
if ((r - mid) > THRESHOLD) `+7F H
mergeSort(data, temp, mid + 1, r); kB7vc>@1
else !NXjax\r
insertSort(data, mid + 1, r - mid); ks405
wj)LOA0
for (i = l; i <= mid; i++) { vB:\ZX4
temp = data; IpP%WW u
} @=-(H<0
for (j = 1; j <= r - mid; j++) { P"YdB|I
temp[r - j + 1] = data[j + mid]; YW}$eW*
} x.SfB[SZ
int a = temp[l]; {15j'Qwm
int b = temp[r]; vgfC{]v<W]
for (i = l, j = r, k = l; k <= r; k++) { ^_7|b[Bt
if (a < b) { oV|O`n
data[k] = temp[i++]; ({f}Z-%
a = temp; !`69.v
} else { 9:j?Jvw$
data[k] = temp[j--]; Ox3=1M0
b = temp[j]; g}an 5a
} 5ut| eD`3
} L*@`i ]jl
} 3Cf9'C
t^s&1#iC
/** cc@W 6W
* @param data LC%ococ
* @param l -IPo/?}
* @param i <r%K i`u(p
*/ +;N]34>S7
private void insertSort(int[] data, int start, int len) { Q@D7\<t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VtBC~?2U)B
} &D,Iwq
} d?,'$$aB
} xc^@"
} asWk]jjMG
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堆排序： N5Js.j>z
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package org.rut.util.algorithm.support; M'*s5:i
*ap,r&]#F
import org.rut.util.algorithm.SortUtil; (q)}`1d'
7]=&Q4e4
/** #'L<7t K
* @author treeroot i8iT}^
* @since 2006-2-2 x|H`%Z
* @version 1.0 z@*E=B1L
*/ Kv_2=]H
public class HeapSort implements SortUtil.Sort{ `Os=cMR
bI):-2&s}
/* (non-Javadoc) qmS9*me {
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mF4W4~"
*/ 0PzSp ]
public void sort(int[] data) { qu=~\t1[6
MaxHeap h=new MaxHeap(); Jo?LPR \6
h.init(data); VB |?S|<
for(int i=0;i h.remove(); %hB-$nE
System.arraycopy(h.queue,1,data,0,data.length); l.Q
} 3efOgP=L
ah>c)1DA*H
private static class MaxHeap{ B#K gU&Loo
-y`Pm8
void init(int[] data){ ;6tra_
this.queue=new int[data.length+1]; _l d.Xmvd
for(int i=0;i queue[++size]=data; \CB^9-V3
fixUp(size); !np_B0`
} |t,sK aL
} $BqiC!~
(tK_(gO
private int size=0; sh/,"b2!P
|G j.E
private int[] queue; _@5Xmr
_3/u#'m0
public int get() { [2:d@=%.
return queue[1]; ZO+RE7f*?c
} SN6 QX!3
Ly=.
public void remove() { A95f!a
SortUtil.swap(queue,1,size--); u[a-9^&g
fixDown(1); Z{8%Cln
} RdCGK?s
file://fixdown aDS:82GMQ
private void fixDown(int k) { lrrTeE*
int j; *G"hjc$L
while ((j = k << 1) <= size) { [(X~C*VdxM
if (j < size %26amp;%26amp; queue[j] j++; 5'!fi]Z
if (queue[k]>queue[j]) file://不用交换 1+%UZK= K
break; fB2ILRc
SortUtil.swap(queue,j,k); ZCCCuB
k = j; dc$zW^i
} \f,<\mJ#
} }8'_M/u\
private void fixUp(int k) { LkbD='\=
while (k > 1) { e=Ox~2S
int j = k >> 1; $tlBI:ay1
if (queue[j]>queue[k]) V&zeC/xSq
break; oodA&0{)d
SortUtil.swap(queue,j,k); 6 AO(A *
k = j; :zW? O#aL-
} Z$z-Hx@%
} {_7hX`p
7F`\Gz_2
} qlhc"}5x }
fTxd8an{
} FB k7Cn!
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SortUtil： `zoHgn7B9q
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package org.rut.util.algorithm; !t%1G.
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import org.rut.util.algorithm.support.BubbleSort; 5BrN uR$
import org.rut.util.algorithm.support.HeapSort; ju2H0AQ
import org.rut.util.algorithm.support.ImprovedMergeSort; `E~"T0RX
import org.rut.util.algorithm.support.ImprovedQuickSort; Y3@+aA
import org.rut.util.algorithm.support.InsertSort; ~/^fdGr
import org.rut.util.algorithm.support.MergeSort; !(*&P
import org.rut.util.algorithm.support.QuickSort; m"L^tSD~
import org.rut.util.algorithm.support.SelectionSort; LWrYKi
import org.rut.util.algorithm.support.ShellSort; ("`"?G
d=1\=d/K
/** =svFw&q"
* @author treeroot VgPlIIHh5
* @since 2006-2-2 %[XP}L$
* @version 1.0 &XNt/bK-?
*/ FQek+[ox
public class SortUtil { :k9T`Aa]
public final static int INSERT = 1; <?41-p-;
public final static int BUBBLE = 2; +G;<D@gSa0
public final static int SELECTION = 3; h-p}Qil,
public final static int SHELL = 4; J;sQvPHV8
public final static int QUICK = 5; 7[e-3
public final static int IMPROVED_QUICK = 6; NSVE3
public final static int MERGE = 7; " ILF!z
public final static int IMPROVED_MERGE = 8; Xl=RaV^X"
public final static int HEAP = 9; $YJ 1P
Mg >%EH/'
public static void sort(int[] data) { P`rfDQoZ
sort(data, IMPROVED_QUICK); *,u{,$}2
} >p&"X 2 @
private static String[] name={ &5}YTKe}|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]ty$/{hx'
}; vhZXgp0X
p,=IL_
private static Sort[] impl=new Sort[]{ kB+$Kt<]L
new InsertSort(), o0WwlmB5
new BubbleSort(), :@(1~Hm
new SelectionSort(), 6TRLHL~B
new ShellSort(), 2UQF:R?LQ
new QuickSort(), Zx8$M5
new ImprovedQuickSort(), iKq_s5|sW
new MergeSort(), (ot,CpI(I
new ImprovedMergeSort(), "%K'~"S#Q,
new HeapSort() M|nLD+d~8
}; YM#'+wl}`
"s@Hg1
public static String toString(int algorithm){ "=2\kZ
return name[algorithm-1]; 27}:f?2hbJ
} ?* ~4~ZEE
2fdN@iruB
public static void sort(int[] data, int algorithm) { 9q]f]S.L
impl[algorithm-1].sort(data); `*[Kmb\
} oW OR7)?r
!I|_vJ@<
public static interface Sort { 5]mH.{$x$?
public void sort(int[] data); e@c8Ce|0
} B<~AUf*y
!bzWgD7j
public static void swap(int[] data, int i, int j) { =nHkFi@D=t
int temp = data; rHk(@T.]
data = data[j]; ~LI}
data[j] = temp; e!=7VEB
} w#2apaz
} >'n[B