[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; 0nOkQVMk>
} SfTTB'9
int i1=l; 3(o}ulp
int i2=mid+1; 7+]+S`p
for(int cur=l;cur<=r;cur++){ K<3,=gL9[
if(i1==mid+1) Sjb[v
data[cur]=temp[i2++]; vC#_PI
else if(i2>r) fl@=h[g#t
data[cur]=temp[i1++]; 3g79pw2w=
else if(temp[i1] data[cur]=temp[i1++]; )\aCeY8o
else ce56$L8[
data[cur]=temp[i2++]; W0-KFo.'
} 1 sJtkge:
} wmV7g7t6
t@(:S6d
} t_xO-fT)
S"=y>.#
改进后的归并排序: L/Tsq=
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package org.rut.util.algorithm.support; b;;mhu[D
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import org.rut.util.algorithm.SortUtil; EN2H[i+,
pZxuV(QP`
/** simD<&p
* @author treeroot !&(^R<-id
* @since 2006-2-2 !#[B#DZc(
* @version 1.0 7=hISQMsVP
*/ f[ 'uka.U
public class ImprovedMergeSort implements SortUtil.Sort { pLdZB9oD]C
9M12|X\]8
private static final int THRESHOLD = 10; ~7 w"$H8
kO3N.t@n
/* x& a<u@[wa
* (non-Javadoc) X;/5Niv32q
* e0Jz|?d=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `*Ju0)g1
*/ 1Zo"Xb
public void sort(int[] data) { 8pXului
int[] temp=new int[data.length]; 9cqq"-$G`
mergeSort(data,temp,0,data.length-1); 2%Mgg,/~
} $-w&<U$E
,@Fde=Lw
private void mergeSort(int[] data, int[] temp, int l, int r) { vk><S|[n
int i, j, k; Mn<#rBE B
int mid = (l + r) / 2; e+~Q58oD
if (l == r) L,\wB7t
return; b[/uSwvi
if ((mid - l) >= THRESHOLD) p)e?0m26
mergeSort(data, temp, l, mid); .P:mYC
else w<|Qezi3 w
insertSort(data, l, mid - l + 1); Z1dLC'/b]
if ((r - mid) > THRESHOLD) VN/v]
mergeSort(data, temp, mid + 1, r); huat,zLS
else %G`GdG}T
insertSort(data, mid + 1, r - mid); ^'G,sZ6'Nh
Vi*HG &DD
for (i = l; i <= mid; i++) { (3VV(18
temp = data; =O o4O CF2
} w,x'FZD
for (j = 1; j <= r - mid; j++) { '$0~PH&
temp[r - j + 1] = data[j + mid]; w D}g\{P
} /idrbc
int a = temp[l]; 5jey%)=
int b = temp[r]; s(0"r.
for (i = l, j = r, k = l; k <= r; k++) { Hx?OCGj=S*
if (a < b) { yx\I&\i
data[k] = temp[i++]; ^q}cy1"j"
a = temp; zgn~UC6&
} else { 9Hm>@dBhM
data[k] = temp[j--]; wa%;'M&
b = temp[j]; AuIg=-xR
} U6xs'0
} ;&} rO.0
} ^Q9!DF m
Sg+0w7:2
/** b[Qe} `W
* @param data ^rh{
* @param l 0-at#r:
* @param i 2tqj]i
*/ ;^DG P
private void insertSort(int[] data, int start, int len) { a,ZmDkzuv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %1Nank!Zj
} 7 (kC|q\4M
} _O;2.M%@
} hdN[wC]
} vp4NH]fJ
^~DDl$NH
堆排序： 5H79-QLd
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package org.rut.util.algorithm.support; |y$8!*S~(
| k?r1dj%O
import org.rut.util.algorithm.SortUtil; lO/?e!$
]t)#,'$^[W
/** `|`Qrv4}
* @author treeroot ,a'Y^[4k?
* @since 2006-2-2 J^gElp
* @version 1.0 v[XTH 2
*/ _eZ*_H,\
public class HeapSort implements SortUtil.Sort{ Ql]+,^kA@
s ;2ih)[
/* (non-Javadoc) BI|YaZa+p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :lE_hY
*/ $I|6v
public void sort(int[] data) { r7Zx<c
MaxHeap h=new MaxHeap(); (RU\a]Ry
h.init(data); fP8iz `n
for(int i=0;i h.remove(); rv<_'yj
System.arraycopy(h.queue,1,data,0,data.length); T=,A pa
} YmPNaL
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private static class MaxHeap{ N9cCfB\`
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void init(int[] data){ q+{$"s9v
this.queue=new int[data.length+1]; cH48)
for(int i=0;i queue[++size]=data; O48*"Z1
fixUp(size); uW0Dm#
} ><wYk)0E
} O6"S=o&
6%a:^f]
private int size=0; @8eQ|.q]Q
*?3c2Jg=E
private int[] queue; Ku`u%5<
$(fhO
public int get() { +)ba9bJ|
return queue[1]; ;ZoEqMv
} wfQ^3HL
b Od<x >@
public void remove() { FH)_L1n
SortUtil.swap(queue,1,size--); >K n7A
fixDown(1); &>A<{J@VL
} i_f\dkol
file://fixdown 952l1c!
private void fixDown(int k) { *;:dJXR
int j; oM(8'{S=
while ((j = k << 1) <= size) { }l7@:ezZZ7
if (j < size %26amp;%26amp; queue[j] j++; :^rt8>~
if (queue[k]>queue[j]) file://不用交换 0b(x@>
break; h.jO3q
SortUtil.swap(queue,j,k); s8.SEk|pB
k = j; SLU$DW;t
} CK9FAuU
} R3|r`~@@
private void fixUp(int k) { wl/1~!
while (k > 1) { %:}o\ _w
int j = k >> 1; 3=-V!E
if (queue[j]>queue[k]) r(KAG"5
break; g[Q+DT
SortUtil.swap(queue,j,k); @p<tJR"M
k = j; ]sZ! -q'8
} Q!y%N&
} `8/D$
J%FF@.)k
} ;6M [d
z\`tnz7>$
} \:4SN&I~
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SortUtil： W1_.wN$,5
/|m0)H.>
package org.rut.util.algorithm; X]}:WGFM
&embAqW:
import org.rut.util.algorithm.support.BubbleSort; k}]M`ad
import org.rut.util.algorithm.support.HeapSort; 9Cz|?71
import org.rut.util.algorithm.support.ImprovedMergeSort; $.x,[R aN
import org.rut.util.algorithm.support.ImprovedQuickSort; B[s
import org.rut.util.algorithm.support.InsertSort; w:+&i|H>
import org.rut.util.algorithm.support.MergeSort; d_7hh
import org.rut.util.algorithm.support.QuickSort; IictX"3lh
import org.rut.util.algorithm.support.SelectionSort; ,c,@WQ2:-
import org.rut.util.algorithm.support.ShellSort; PiN^/#D
uN4e n,
/** ]d~2WX Y
* @author treeroot 89x;~D1
* @since 2006-2-2 ?$#P =VK
* @version 1.0 ;EQ7kuJQ?
*/ x c]#8K
public class SortUtil { 8"}8Nrb0
public final static int INSERT = 1; ZeqsXz
public final static int BUBBLE = 2; @{"?fqo
public final static int SELECTION = 3; MK(~
public final static int SHELL = 4; s:3b.*t<
public final static int QUICK = 5; !Ahxi);a
public final static int IMPROVED_QUICK = 6; [2PPa9F
public final static int MERGE = 7; t:"3MiM=c
public final static int IMPROVED_MERGE = 8; hp`ZmLq/[
public final static int HEAP = 9; YQcaWd(
&z#`Qa3NI
public static void sort(int[] data) { d ehK#8
sort(data, IMPROVED_QUICK); Xe&p.v
} qKrxln/T
private static String[] name={ EbG&[v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]$=#:uf
}; x4K A8
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private static Sort[] impl=new Sort[]{ 7,zE?KG /
new InsertSort(), wYr*('uT
new BubbleSort(), d(yTz&u)
new SelectionSort(), [ ebk u_
new ShellSort(), pI_dV44W
new QuickSort(), L2=:Nac
new ImprovedQuickSort(), h5(OjlMC
new MergeSort(), hr!'
new ImprovedMergeSort(), {[3xi`0-
new HeapSort() e/&^~ $h
}; E\ls- (,
3m| C8:
public static String toString(int algorithm){ THARr#1b};
return name[algorithm-1]; O?O=]s u
} ?:h*=0>
N=\weuED
public static void sort(int[] data, int algorithm) { ^GlzKl
impl[algorithm-1].sort(data); bjo}95
} 9s1^hW2%Q
d^f rKPB
public static interface Sort { *%Fu/
public void sort(int[] data); 5+Ao.3Xn
} #qFY`fVf1
eC94rcb}i{
public static void swap(int[] data, int i, int j) { S9{A}+"K
int temp = data; jtUqrJFlQ
data = data[j]; &isKU8n
data[j] = temp; AvPPsN0
} OJd/#KFm
} U(LLIyZv