[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; T@>63
} *hl<Y,W(
int i1=l; 'T{pdEn8u
int i2=mid+1; jM;d>Gymx
for(int cur=l;cur<=r;cur++){ hf[IEK
if(i1==mid+1) xF^r`
data[cur]=temp[i2++]; mlmnkgl ]
else if(i2>r) e7wKjt2fy
data[cur]=temp[i1++]; ]N_140N~
else if(temp[i1] data[cur]=temp[i1++]; b`?M9f5
else aEZJNWv
data[cur]=temp[i2++]; b__n~\q_
} I$F\(]"@
} s!=!A
&,Uc>L%m
} 1(D1}fcul
5Wj5IS/
改进后的归并排序: aeQ{_SK
VN!^m]0
package org.rut.util.algorithm.support; d OzO/w&
hiT9H5 6>
import org.rut.util.algorithm.SortUtil; 1gL8$.B?
)8\Z=uC
/** mrX}\p
* @author treeroot Yr Preuh
* @since 2006-2-2 Y~<rQ
* @version 1.0 WJP`0f3
*/ pvI&-D #}
public class ImprovedMergeSort implements SortUtil.Sort { '$lw[1
d9ZDpzxB
private static final int THRESHOLD = 10; 7=AO^:=bx
C[^a/P`i
/* <`^>bv9
* (non-Javadoc) )vxVg*.Ee
* 30e(4@!4vW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H74NU_
*/ '[0 3L9
public void sort(int[] data) { %Tk}sfx
int[] temp=new int[data.length]; I*%&)Hj~
mergeSort(data,temp,0,data.length-1); gDgP;id
} (}~ 1{C@
&xF4p,7
private void mergeSort(int[] data, int[] temp, int l, int r) { }P7xdQ6
int i, j, k; +*]SP@|IYI
int mid = (l + r) / 2; R?i-"JhW
if (l == r) bkJn}Al;
return; =r=^bNO
if ((mid - l) >= THRESHOLD) hnlU,p&y3
mergeSort(data, temp, l, mid); "Vs Nyy
else |J@|
insertSort(data, l, mid - l + 1); ]g>T9,)l
if ((r - mid) > THRESHOLD) qM+!f2t
mergeSort(data, temp, mid + 1, r); L+`}euu5
else >7eu'
insertSort(data, mid + 1, r - mid); 47$-5k30
=W97|BIW,
for (i = l; i <= mid; i++) { N$L&|4r
temp = data; !:`Ra
} a'(lVZA;
for (j = 1; j <= r - mid; j++) { +/1P^U /
temp[r - j + 1] = data[j + mid]; 3RG/X
} jnx+wcd
int a = temp[l]; ;L MEU_
int b = temp[r]; "dFdOb"O-
for (i = l, j = r, k = l; k <= r; k++) { =t <:zLe
if (a < b) { .oB'ttF1
data[k] = temp[i++]; y$"~^8"z
a = temp; C:TuC5Sr
} else { jp\JwE
data[k] = temp[j--]; oQKcGUZ
b = temp[j]; ,DW0A//
} k,o=1I
} H>Iet}/c
} rYP8V >
&St~!y6M?
/** ueS[sN!
* @param data U{.+*e18
* @param l '{1W)X
* @param i ;FIMCJS
*/ FlM.Du
private void insertSort(int[] data, int start, int len) { "Hsq<oV8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +;4AG::GN
} 'bQs_
} ;nHo%`Zt
} _dB0rsCnU%
} 8M5!5Jzv
U(=f5|-
堆排序： (&a3v
\5v=pDd4g
package org.rut.util.algorithm.support; ({}O M=_
!F}J+N=}
import org.rut.util.algorithm.SortUtil; \3@2rW"5
Z{|.xgsY
/** N1B$G
* @author treeroot ~]D\&D9=?
* @since 2006-2-2 #RZJ1uL
* @version 1.0 aL$c).hq0
*/ UC<[z#]\;
public class HeapSort implements SortUtil.Sort{ [M zc^I&
vX!dMJa0
/* (non-Javadoc) 1Tts3O.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yQQDGFTb!=
*/ n=Z[w5
public void sort(int[] data) { GurE7J^=
MaxHeap h=new MaxHeap(); [{fF)D<tC
h.init(data); 71.:p,Z@z
for(int i=0;i h.remove(); kAKqW7,q"
System.arraycopy(h.queue,1,data,0,data.length); J.+?*hcw
} M,v@G$pW
VNh,pQ(
private static class MaxHeap{ <8xP-(wk;
McMK|_H
void init(int[] data){ _<' kzOj
this.queue=new int[data.length+1]; Vzv.e6_
for(int i=0;i queue[++size]=data; f%"_U'
fixUp(size); O7#}8-@}<u
} R'a5,zEo/
} F.* snF
(J) Rs`_
private int size=0; IbNTdg]/F`
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private int[] queue; zI*/u)48
K]=>F
public int get() { wW)&Px n
return queue[1]; `peJ s~V
} IUBps0.T\
wx?{|
public void remove() { G5eLs
SortUtil.swap(queue,1,size--); v!v0,?b*
fixDown(1); B}xo|:f!zj
} {Z{NH:^
file://fixdown qh'f,#dI}
private void fixDown(int k) { H ]N/Y{
int j; m3v*,~
while ((j = k << 1) <= size) { >p+gx,N
if (j < size %26amp;%26amp; queue[j] j++; 4 d1Y\
if (queue[k]>queue[j]) file://不用交换 {G*:N[pJp
break; E0?\DvA
SortUtil.swap(queue,j,k); eG)/&zQ8
k = j; ez<wEtS
} %A[p!U
} NbK?Dg8WJG
private void fixUp(int k) { A#07Ly8kXn
while (k > 1) { :+V1682u
int j = k >> 1; b-=[(]_$h
if (queue[j]>queue[k]) z E7ocul
break; e hB1`%@
SortUtil.swap(queue,j,k); .$x[!fuuR&
k = j; Q24:G
} (Vv[
} }4ghT(C}$
qYrGe
} g!|E!\p
!JQ~r@j
} ;<GTtt#D
J'4@-IM
SortUtil： 4R^j"x 5
R*5;J`TW
package org.rut.util.algorithm; 0tL/:zID
hFPRC0ftE
import org.rut.util.algorithm.support.BubbleSort; h.+&=s!Nsy
import org.rut.util.algorithm.support.HeapSort; u0H`%m
import org.rut.util.algorithm.support.ImprovedMergeSort; gB{R6 \<O
import org.rut.util.algorithm.support.ImprovedQuickSort; E@}j}/%'O
import org.rut.util.algorithm.support.InsertSort; l8d%hQVqT
import org.rut.util.algorithm.support.MergeSort; 7G=P|T\
import org.rut.util.algorithm.support.QuickSort; WBIB'2:m
import org.rut.util.algorithm.support.SelectionSort; Xm[r#IA
import org.rut.util.algorithm.support.ShellSort; <!nWiwv
->25$5#
/** XGl13@=O
* @author treeroot 8'\,&f`Y
* @since 2006-2-2 e/#&5ISk
* @version 1.0 ?GfA;O
*/ (pK4i5lT
public class SortUtil { ?m7"G)
public final static int INSERT = 1; Tb6x@MorP
public final static int BUBBLE = 2; "._WdY[
public final static int SELECTION = 3; *b l{F\
public final static int SHELL = 4; I; }%k;v6
public final static int QUICK = 5; [(UqPd$
public final static int IMPROVED_QUICK = 6; k{w^MOHNg
public final static int MERGE = 7; )Is*- W
public final static int IMPROVED_MERGE = 8; |g^W @.P
public final static int HEAP = 9; ovoI~k'
eii7pbc
public static void sort(int[] data) { m%(JRh
sort(data, IMPROVED_QUICK); PC7.+;1
} )Ua2x@j'C@
private static String[] name={ bh"v{V`=0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;= @-j@?
}; a^/20UFq
tU2;Wb!Y
private static Sort[] impl=new Sort[]{ @I.OT
new InsertSort(), D>^ix[:J
new BubbleSort(), Sqt"G6<
new SelectionSort(), $^aXVy5p
new ShellSort(), Q+M3Pqy
new QuickSort(), w%-!dbmb%
new ImprovedQuickSort(), )g<qEyJR
new MergeSort(), *B}R4Y|g
new ImprovedMergeSort(), SF=|++b1f
new HeapSort() #zD+DBTAu
}; M#2U'jy
uM<+2S
public static String toString(int algorithm){ jCv+m7Z
return name[algorithm-1]; VQx-gm8}!
} bUB6B
> V}NG
public static void sort(int[] data, int algorithm) { pr89zkYw
impl[algorithm-1].sort(data); '^Np<
} .7rsbZzs
p6\9HG
public static interface Sort { li XD2N
public void sort(int[] data); *4VP5]!
} sjkl? _
g*AqFY7|
public static void swap(int[] data, int i, int j) { :6iq{XV^
int temp = data; &4iIzw`
data = data[j]; /VZU3p<~
data[j] = temp; g<c^\WG
} 2g==98>cg
} 3yX^R^`