[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; wH"9N+82M
} 8L[+$g`
int i1=l; yu_PZ"l
int i2=mid+1; E$%v);u
for(int cur=l;cur<=r;cur++){ CDJ@Tdp
if(i1==mid+1) !$Uo$?gC
data[cur]=temp[i2++]; ij]UAJ}t
else if(i2>r) Dbn~~P
data[cur]=temp[i1++]; e"866vc,
else if(temp[i1] data[cur]=temp[i1++]; 1(;{w+nM
else r(^00hvH
data[cur]=temp[i2++]; |?KYY0
} D:k< , {
} hT%fM3|,e
%Za}q]?
} IYn`&jS{
)B]"""J
改进后的归并排序: wXQu%F3
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package org.rut.util.algorithm.support; r (m3"Xu6O
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import org.rut.util.algorithm.SortUtil; P 0\`4Cr!
!$n@:W/
/** bofI0f}5.
* @author treeroot TqJ @l
* @since 2006-2-2 <HnJD/g
* @version 1.0 O n0!>-b,
*/ }/J"/ T
public class ImprovedMergeSort implements SortUtil.Sort { RrxbsG1HP
,|c;x1|O
private static final int THRESHOLD = 10; _HM?p(H@
A"r<$S6
/* Kjbk zc1
* (non-Javadoc) Sk EI51]
* Op0*tj2i),
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Um/l{:S
*/ xy`Y7W=
public void sort(int[] data) { aUL7]'q}
int[] temp=new int[data.length]; 7s^b@&Le
mergeSort(data,temp,0,data.length-1); l]wfL;u
} KS#A*BRQ
I{w(`[Nxw*
private void mergeSort(int[] data, int[] temp, int l, int r) { bR3Crz(9G
int i, j, k; i).Vu}W#S
int mid = (l + r) / 2; ]6(%tU
if (l == r) yoGG[l2k>s
return; & *tL)qKDc
if ((mid - l) >= THRESHOLD) 8i$|j~M a
mergeSort(data, temp, l, mid); l!gX-U%-
else (PE.v1T
insertSort(data, l, mid - l + 1); a;5clonB
if ((r - mid) > THRESHOLD) 1Z0Qkd(
mergeSort(data, temp, mid + 1, r); << =cZ.HP
else 9O &]!ga
insertSort(data, mid + 1, r - mid); p7AsNqEp
]ovtH.y
for (i = l; i <= mid; i++) { OM.-apzC
temp = data; HG /fp<[
} -pJ\_u/&%`
for (j = 1; j <= r - mid; j++) { TgJ+:^+0
temp[r - j + 1] = data[j + mid]; Yv=L'0K&
} :UT\L2 q=
int a = temp[l]; U _pPI$ =
int b = temp[r]; OfrzmL<K
for (i = l, j = r, k = l; k <= r; k++) { nYyKz Rz
if (a < b) { H6Zo|n
data[k] = temp[i++]; S.[L?uE~F
a = temp; ~NE`Ad.G
} else { 6 JI8l`S
data[k] = temp[j--]; ;a|%W4"
b = temp[j]; 0++RxYFCL
} `Cd!
} ~_0XG0oA
} 2iKteJ@h)
E6R\DM
/** kJ%a;p`O
* @param data 4,@jSr|I3i
* @param l "KF]s.
* @param i !pj&h0CR
*/ BNk>D|D;
private void insertSort(int[] data, int start, int len) { S['rTuk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aAP86MHO
} :CqR1_n%
} E<D^j^T
} N[-$*F,:_
} uo?R;fX26
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堆排序： @r<2]RXlc
KtJc9dnX
package org.rut.util.algorithm.support; jHob{3
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import org.rut.util.algorithm.SortUtil; ouyZh0G
8 # BR\
/** D?dS/agA
* @author treeroot Lo}T%0"G
* @since 2006-2-2 <iH
* @version 1.0 4lCbUk[l
*/ ` >>]$ZJ
public class HeapSort implements SortUtil.Sort{ PDH|=meXM
'w1ll9O
/* (non-Javadoc) Vug[q=i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C[{E8Tg/
*/ 6J- /%
public void sort(int[] data) { /F^ Jn_
MaxHeap h=new MaxHeap(); n4B uM R
h.init(data); ,Y| ;V
for(int i=0;i h.remove(); G,+3(C
System.arraycopy(h.queue,1,data,0,data.length); Ya~Th)'>q
} Y_C6*T%
^N^s|c'
private static class MaxHeap{ )l(DtU!E
%p7onwKq0
void init(int[] data){ Ik,N/[
this.queue=new int[data.length+1]; 9W-"mD;
for(int i=0;i queue[++size]=data; i"+TKo-
fixUp(size); )b%zYD9p
} QxbG-B^)=
} x8c>2w;6x^
PYNY1|3
private int size=0; vo:h"ti
*6][[)(
private int[] queue; <Vt"%C
uwi.Sg11
public int get() { 4Q1R:Ra
return queue[1]; ,ExY.'%1
} 0,&] 2YJ
Jq"3xj
public void remove() { !K2QD[x
SortUtil.swap(queue,1,size--); Piw i
fixDown(1); GBBp1i
} N_FjEZpX
file://fixdown =b"{*Heuw
private void fixDown(int k) { J0f!+]~G3
int j; =eS?`|
while ((j = k << 1) <= size) { 0dsL%G~/N
if (j < size %26amp;%26amp; queue[j] j++; x1Z'_Qw
if (queue[k]>queue[j]) file://不用交换 s^.tj41Gx}
break; 2B)1 tP
SortUtil.swap(queue,j,k); .F%jbnKd_
k = j; <Mj{pN3
} Z;tWV%F5
} ~$//4kES
private void fixUp(int k) { S|KUh|=Q
while (k > 1) { ang~_Ec.
int j = k >> 1; NYKYj`K
if (queue[j]>queue[k]) ;gAL_/_
break; B7Zi|-F
SortUtil.swap(queue,j,k); +~:OUR*>
k = j; {wk#n.c
} owyQFk
} lqO>Q1_{K
A@Zqh<,Ud
} eHIcfp@&
r}(mjC"o
} e%)MIAS0
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SortUtil： 1A* "v
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package org.rut.util.algorithm; UxF9Ko( ]d
sV0NDM0
import org.rut.util.algorithm.support.BubbleSort; GJU9[
import org.rut.util.algorithm.support.HeapSort; 92C; a5s
import org.rut.util.algorithm.support.ImprovedMergeSort; 7hLh}
import org.rut.util.algorithm.support.ImprovedQuickSort; >o3R~ [
import org.rut.util.algorithm.support.InsertSort; 2qVoe}F
import org.rut.util.algorithm.support.MergeSort; 0DnOO0Nc
import org.rut.util.algorithm.support.QuickSort; f<oU"WM
import org.rut.util.algorithm.support.SelectionSort; Vo.~1^
import org.rut.util.algorithm.support.ShellSort; fo~*Bp()-E
WCk. K
/** C1l'<
* @author treeroot \"L0d1DK)
* @since 2006-2-2 O:~J_Wwl!
* @version 1.0 MXDCOe~07
*/ !I&,!$
public class SortUtil { P1^|r}
public final static int INSERT = 1; e^x%d[sU
public final static int BUBBLE = 2; '.gi@Sr5
public final static int SELECTION = 3; pp{p4Z
public final static int SHELL = 4; 'mm>E
public final static int QUICK = 5; #_K<-m%9
public final static int IMPROVED_QUICK = 6; K3WaBcm
public final static int MERGE = 7; gLFTnMO
public final static int IMPROVED_MERGE = 8; LylCr{s7
public final static int HEAP = 9; Jk7 Am-.0
8^_e>q*W
public static void sort(int[] data) { C9""sVs
sort(data, IMPROVED_QUICK); ~6O~Fth
} BG.sHI{
private static String[] name={ h qhX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q\gbjci
}; 3^$=XrD
Bga4kjfmk
private static Sort[] impl=new Sort[]{ to1r 88X
new InsertSort(), >#gDk K
new BubbleSort(), q"S,<I<f
new SelectionSort(), p-w:l*-`
new ShellSort(), vCK+v r!
new QuickSort(), BnDCK@+|Q
new ImprovedQuickSort(), cW"DDm g
new MergeSort(), bC) <K/Q9
new ImprovedMergeSort(), 0V^I.S/q
new HeapSort() -yBj7F|
}; ,q7FK z{
6R$Yh0%
public static String toString(int algorithm){ .j>MsQP#\C
return name[algorithm-1]; Q7d@+C
} -XK;B--c
7xux%:BN
public static void sort(int[] data, int algorithm) { ?Pf#~U_
impl[algorithm-1].sort(data); mI:^lp
} 0_Elxc
&N+`O)$
public static interface Sort { cD)9EFo
public void sort(int[] data); 8|L@-F
} /& c2y=/'C
$<&_9T#&w
public static void swap(int[] data, int i, int j) { BSJS4+,E
int temp = data; Dfc% jWbA
data = data[j]; 2+C:Em0yI
data[j] = temp; ;4GGXT++L
} /eXiWasQ
} WSv%Rxr8L