[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; 4g/Ly8
} p@=B\A]
int i1=l; =/^{Pn
int i2=mid+1; FPuF1@K
for(int cur=l;cur<=r;cur++){ u6p nO
if(i1==mid+1) N07FU\<9
data[cur]=temp[i2++]; Dj{t[z]$k
else if(i2>r) A|0\ct
data[cur]=temp[i1++]; Ha!]*wg#
else if(temp[i1] data[cur]=temp[i1++]; X;p4/ *U
else 8:Jc2K
data[cur]=temp[i2++]; ')v<MqBr
} 6[C>"s}Ol
} ]0@ J)Z09
q;qY#wD@
} JiHk`e`
n@| &jh
改进后的归并排序: D5fhOq+g
6%UhP;(
package org.rut.util.algorithm.support; I/w=!Ih
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import org.rut.util.algorithm.SortUtil; xcu:'7'K[
T#G (&0J5
/** IWAp
* @author treeroot (Z};(Hn
* @since 2006-2-2 %y2i1^
* @version 1.0 3ES3,uR
*/ 8#~x6\!b
public class ImprovedMergeSort implements SortUtil.Sort { Ru^j~Cj5
[=KA5c<
private static final int THRESHOLD = 10; F$&{@hd
=5X(RGK
/* hXsH9R
* (non-Javadoc) VZ$FTM^b8
* %N-f9o8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3%SwCYd
*/ T,Zfz9{n
public void sort(int[] data) { ye1hcQ
int[] temp=new int[data.length]; U6R~aRJ;
mergeSort(data,temp,0,data.length-1); _,9/g^<
} 6`hHx=L
9"mcN3x:\e
private void mergeSort(int[] data, int[] temp, int l, int r) { sAU!u
int i, j, k; ;b1*2-
int mid = (l + r) / 2; !8i[.EAT
if (l == r) Sg}]5Mn`
return; aJ}Cqk
if ((mid - l) >= THRESHOLD) h;8^vB y
mergeSort(data, temp, l, mid); h4dT N}
else k'$UA$2d
insertSort(data, l, mid - l + 1); `}9jvR5
if ((r - mid) > THRESHOLD) h\qM5Qx+Q
mergeSort(data, temp, mid + 1, r); SPK% ' s
else W"L;8u
insertSort(data, mid + 1, r - mid); ,~,{$\p
(#;<iu}
for (i = l; i <= mid; i++) { $j!VJGVG
temp = data; _3?7iH
} V:8ph`1
for (j = 1; j <= r - mid; j++) { yzQ^KqLH
temp[r - j + 1] = data[j + mid]; A#B6]j)
} 34\:1z+s M
int a = temp[l]; u|a+:r)*4
int b = temp[r]; <[mvfw
for (i = l, j = r, k = l; k <= r; k++) { i=G.{.
if (a < b) { atO/Tp
data[k] = temp[i++]; 6S2v3
a = temp; v"dj%75O?e
} else { ;\Vi~2!8
data[k] = temp[j--]; /_MEb42&
b = temp[j]; nXuoRZ
} ;/phZ$l
} #=B~} _
} &7\q1X&Rr
>B9|;,a
/** w\z6-qa
* @param data ^Q$U.sN?R
* @param l MHVHEwr.{
* @param i cp7Rpqg
*/ GGR hM1II
private void insertSort(int[] data, int start, int len) { ")87GQ(R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \f7Aj>
} g5*Zg_G/
} On{p(|l
} V=,VOw4
} ,3`RM$
AK*F,H9
堆排序： U0kEhMIIf
ZiS<vWa3R
package org.rut.util.algorithm.support; TZ,kmk#
szy^kj^2
import org.rut.util.algorithm.SortUtil; 9"YOj_z
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/** ITu6m<V
* @author treeroot kM,$0@
* @since 2006-2-2 'h&"xXv4|
* @version 1.0 =fZ)2q
*/ nUL8*#p-
public class HeapSort implements SortUtil.Sort{ g0!{CW
Uxq9H
/* (non-Javadoc) cH!w;Ub]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {)QSxO
*/ `E),G;I
public void sort(int[] data) { .D`""up|{
MaxHeap h=new MaxHeap(); G3&l|@5
h.init(data); q{W@J0U
for(int i=0;i h.remove(); ;(0E#hGN
System.arraycopy(h.queue,1,data,0,data.length); :/kz*X=<
} c?NXX&
9aE!! (E
private static class MaxHeap{ -nQ:RHnd
t(|\3$z
void init(int[] data){ x]gf3Tc58
this.queue=new int[data.length+1]; EfR3$sp
for(int i=0;i queue[++size]=data; V.RG=TVS
fixUp(size); ;@$B{/Q
} %y/8i%@6
} #*[G,s#t^
:Q\{LBc
private int size=0; rN'')n/F
_O-ZII~
private int[] queue; uV:;q>XM'%
xYJ|G=h&A
public int get() { os]P6TFFX?
return queue[1]; o1"MW>B,4
} 72gQ<Si
cj:!uhZp7
public void remove() { Ed%8| M3
SortUtil.swap(queue,1,size--); J0e~s
fixDown(1); RfMrGC^?
} (P-Bmu!s
file://fixdown {:VUu?5-t;
private void fixDown(int k) { ;Q;u^T`
int j; Q-X<zn
while ((j = k << 1) <= size) { `2X#;{a:
if (j < size %26amp;%26amp; queue[j] j++; lqO"
if (queue[k]>queue[j]) file://不用交换 {o?+T);Z
break; 6}YWM]c%
SortUtil.swap(queue,j,k); ^&'&Y>
k = j; .cTK\
} R(c:#KF#8
} d85\GEF9i
private void fixUp(int k) { ?t&sT
while (k > 1) { 38wt=0br
int j = k >> 1; +6=2B0$ r
if (queue[j]>queue[k]) KrhAObK
break; Mb6#97
SortUtil.swap(queue,j,k); yB&+2
k = j; mr+J#
} ydCVG,"
} R0R Xw
w !N;Y0
} Xj/U~
u;xl}
} BTXS+mvl
[/}y!;3iXM
SortUtil： %E95R8SL
:GU6v4u
package org.rut.util.algorithm; edh?I1/
x<'(b7{U0
import org.rut.util.algorithm.support.BubbleSort; k\T,CZ<
import org.rut.util.algorithm.support.HeapSort; }*{@-v|_R
import org.rut.util.algorithm.support.ImprovedMergeSort; "#4p#dM0e
import org.rut.util.algorithm.support.ImprovedQuickSort; >g%^hjJ
import org.rut.util.algorithm.support.InsertSort; u.wm;eK[
import org.rut.util.algorithm.support.MergeSort; GbC-6.~
import org.rut.util.algorithm.support.QuickSort; &j\<UPn
import org.rut.util.algorithm.support.SelectionSort; etX&o5A
import org.rut.util.algorithm.support.ShellSort; Yq;|Me{h
E\V-<]o
/** gWo`i
* @author treeroot =X(8[ e
* @since 2006-2-2 =v4;t'_^
* @version 1.0 qW57h8M
*/ mJ=3faM
public class SortUtil { yv:8=.r}M
public final static int INSERT = 1; <MhjvHg
public final static int BUBBLE = 2; i,Yq oe`
public final static int SELECTION = 3; _c=[P@
public final static int SHELL = 4; h&3*O[`
public final static int QUICK = 5; Ex'6 WN~kD
public final static int IMPROVED_QUICK = 6; %[:\ZwT,-
public final static int MERGE = 7; " h,<PF
public final static int IMPROVED_MERGE = 8; )P:r;a'
public final static int HEAP = 9; VJ`c/EVIt
z z@;UbD"
public static void sort(int[] data) { 1]HEwTT/1_
sort(data, IMPROVED_QUICK); FE+Y#
} $EjM)
private static String[] name={ 4J=6A4O5Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K-&&%Id6R
}; ""[(e0oA
7tOOruiC
private static Sort[] impl=new Sort[]{ d,fX3
new InsertSort(), @V/Lqia
new BubbleSort(), ?)$+W+vK
new SelectionSort(), lsV9-)yyl
new ShellSort(), lW^bn(_gQ
new QuickSort(), \Kph?l9Ww
new ImprovedQuickSort(), gC81ICM
new MergeSort(), Vy;f4;I{
new ImprovedMergeSort(), <MgR x9
new HeapSort() 2%YtMkC5
}; >uS?Nz5/
bi:m;R
public static String toString(int algorithm){ gA)!1V+:
return name[algorithm-1]; *u$MqN
} cd8~y
mX78Av.z!
public static void sort(int[] data, int algorithm) { FgILQ"+
impl[algorithm-1].sort(data); MHN?ZHC)
} 74VN3m
3[kY:5-
public static interface Sort { KX e/i~AS
public void sort(int[] data); -aCtk$3
} d'~sy>
8}m bfuo1
public static void swap(int[] data, int i, int j) { :3k&[W*
int temp = data; <qD/ #$
data = data[j]; J:
data[j] = temp; +.N3kH
} 0MK|spc
} G1 ?."