[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; 7e<\11uI]a
} ~ePtK~,dv
int i1=l; _v=zFpR
int i2=mid+1; Z-z(SKL
for(int cur=l;cur<=r;cur++){ &d[%
if(i1==mid+1) 3+:uV
data[cur]=temp[i2++]; 3_c4+u"6
else if(i2>r) [[8h*[:
data[cur]=temp[i1++]; ig:z[k?
else if(temp[i1] data[cur]=temp[i1++]; \&%y4=y<sE
else v!rOT/I
data[cur]=temp[i2++]; ut9R]01:
} ZvW&%*k=
} O9MBQNwjA
VV=6v;u`
} ]hA]o7k
;5}y7#4C
改进后的归并排序: R~XNF/QMl
I$Fr8R$
package org.rut.util.algorithm.support; /Oa.@53tK6
%'[ pucEF
import org.rut.util.algorithm.SortUtil; %Z#[{yuFs
Ya,(J0l
/** <e'l"3+9(
* @author treeroot vTYgWR,h
* @since 2006-2-2 29h_oNO
* @version 1.0 3x~AaC.j
*/ ("j*!Dsd
public class ImprovedMergeSort implements SortUtil.Sort { [fXC ;c1
05vu{>
private static final int THRESHOLD = 10; ou'|e"tI
Ix|^c268o<
/* @NJJ
* (non-Javadoc) <<9Y=%C+
* 3 p9LVa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I}7=\S/@
*/ wi-{&
public void sort(int[] data) { ?anKSGfj
int[] temp=new int[data.length]; +jz%:D
mergeSort(data,temp,0,data.length-1); tM{U6k
} H.: [# a
E 5bo60z
private void mergeSort(int[] data, int[] temp, int l, int r) { Z~Z+Yt;,9a
int i, j, k; `_H^k!^
int mid = (l + r) / 2; _<G%
if (l == r) aQhr$aH
return; >d#6qXKAU
if ((mid - l) >= THRESHOLD) } T<oLvS
mergeSort(data, temp, l, mid); pNR69/wGi
else 1`8(O >5
insertSort(data, l, mid - l + 1); oq}Q2[.b
if ((r - mid) > THRESHOLD) vH9Gf
mergeSort(data, temp, mid + 1, r); t>>\U X
else wKs-<b%;
insertSort(data, mid + 1, r - mid); Yo#F;s7
0_5j(
for (i = l; i <= mid; i++) { 7u7 <"?v=
temp = data; >c:- ;(k
} f:K`MW
for (j = 1; j <= r - mid; j++) { ; +E@h=?
temp[r - j + 1] = data[j + mid]; #pw=HHq*(
} (-rw]=Qu
int a = temp[l]; -}2e+DyAy
int b = temp[r]; * E3 c--
for (i = l, j = r, k = l; k <= r; k++) { B3|rO
if (a < b) { ]&/KAk
data[k] = temp[i++]; 1)f~OL8o
a = temp; y[@<goT
} else { k/ ZuFTN
data[k] = temp[j--]; 9d!}]+"d42
b = temp[j]; #T8$NZA
} 4$!iw3N(
} ec` $2u
} tpi>$:e
zE NlL
/** (">gLr
* @param data "ZyWU f
* @param l ~.wDb,*
* @param i wUz)9n 6j
*/ qP0_#l&
private void insertSort(int[] data, int start, int len) { j?n:"@!G/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,o)U9<
} Q-GnNT7MB3
} hq^@t6!C\m
} N~An}QX|
} A?xb u*zV,
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堆排序： A{Q:,S)
+tXOP|X
package org.rut.util.algorithm.support; ihJC)m`Hbl
y3O Nn~k
import org.rut.util.algorithm.SortUtil; #dgWXO
[oQ&}3\XJ
/** j\SW~}d9
* @author treeroot cAE.I$T(
* @since 2006-2-2 Y)I8(g}0
* @version 1.0 qm)KO 4
*/ vYNh0)$%F
public class HeapSort implements SortUtil.Sort{ J12ZdC'O
H19CVc\B
/* (non-Javadoc) =Gq 'sy:h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L){rv)?="
*/ _8'FI_E3
public void sort(int[] data) { P2Ja*!K]
MaxHeap h=new MaxHeap(); vK\;CSk
h.init(data); oGLSk(T&I
for(int i=0;i h.remove(); K>`7f]?H*e
System.arraycopy(h.queue,1,data,0,data.length); )ccdfSe
} 4%I(Z'*Cx
E0Vl}b
private static class MaxHeap{ 7^J-5lY3S
GBZx@B[TY
void init(int[] data){ =R^V[zTn_
this.queue=new int[data.length+1]; 4JHFn [%
for(int i=0;i queue[++size]=data; f9FsZD
fixUp(size); hsQrHs'k
} ?eb2T`\0Q
} [-sE:O`yt
[N/[7Q/y
private int size=0; u= K?K
snBC +`-
private int[] queue; <'4DMZ-G
w%1B_PyDg
public int get() { *s6MF{Ds
return queue[1]; pAV}hB
} T@]vjXd![
(r^IW{IndX
public void remove() { /y,~?
SortUtil.swap(queue,1,size--); t _Q/v
fixDown(1); x=qACoq
} jBEt!Azur
file://fixdown XRI1/2YA
private void fixDown(int k) { ` m`Sl[6
int j; Iy](?b
while ((j = k << 1) <= size) { E$FXs~a
if (j < size %26amp;%26amp; queue[j] j++; &:-`3J-
if (queue[k]>queue[j]) file://不用交换 $s hlNW\
break; zy#E qv
SortUtil.swap(queue,j,k); J|Lk::Ri
k = j; id.o)=
} L$`!~z1
} dxkXt k
private void fixUp(int k) { @Ey(0BxNu
while (k > 1) { MWCP/~>a2
int j = k >> 1; C<6IiF[>%
if (queue[j]>queue[k]) 3Nh;^
break; 0rT-8iJp4P
SortUtil.swap(queue,j,k); {nbD5?
k = j; EYUr.#:
} #TUsi,jG
} ~S R:,R
}@OykN
} H+; _fd
sf?D4UdIH
} ;1cX|N=
`ge{KB;*n#
SortUtil： -{ZTp8P>
AdB5D_ Ir
package org.rut.util.algorithm; +gOCl*L
*kxk@(lT?
import org.rut.util.algorithm.support.BubbleSort; 6yF4%Sz9
import org.rut.util.algorithm.support.HeapSort; "_C^Bc
import org.rut.util.algorithm.support.ImprovedMergeSort; yi7-[W}
import org.rut.util.algorithm.support.ImprovedQuickSort; nrA}36E
import org.rut.util.algorithm.support.InsertSort; -)?~5Z
import org.rut.util.algorithm.support.MergeSort; u9>.x zYG
import org.rut.util.algorithm.support.QuickSort; "wxs
import org.rut.util.algorithm.support.SelectionSort; q]5"V>D \
import org.rut.util.algorithm.support.ShellSort; FI~)ZhE)]
QHsS|\u
/** jjz<V(Sk
* @author treeroot RH. oo&
* @since 2006-2-2 mYb8
* @version 1.0 jo<[|ZD
*/ 9\Mesf1$o
public class SortUtil { iYv6B6o/99
public final static int INSERT = 1; P7E}^y`e
public final static int BUBBLE = 2; [(`T*c.#.X
public final static int SELECTION = 3; d?&?$qf[
public final static int SHELL = 4; L"tj DAV
public final static int QUICK = 5; ^?toTU
public final static int IMPROVED_QUICK = 6; _q=$L eO5
public final static int MERGE = 7; c?eV8h1G
public final static int IMPROVED_MERGE = 8; \GbT^!dj
public final static int HEAP = 9; s+^o[R T3
>lyUr*4PX
public static void sort(int[] data) { mb?DnP,z
sort(data, IMPROVED_QUICK); i2$U##-ro]
} d Z"bc]z{
private static String[] name={ )u]<8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Tc\^=e^N?
}; S_6`.@B}
7esG$sVj(
private static Sort[] impl=new Sort[]{ tZU"Ud
new InsertSort(), 2X)E3V/*
new BubbleSort(), Z[AJat@H
new SelectionSort(), E] t:_v
new ShellSort(), J(M0t~RZ
new QuickSort(), ez86+
new ImprovedQuickSort(), f8N
new MergeSort(), xvjHGgWSxc
new ImprovedMergeSort(), Roy`HU ;0a
new HeapSort() 8+ B.x
}; &N*S
$1\<>sJH
public static String toString(int algorithm){ \p@,+ -gX
return name[algorithm-1]; ahS*YeS7
} }PyAmh$@
JeUFCWm
public static void sort(int[] data, int algorithm) { aiw~4ix
impl[algorithm-1].sort(data); nf/iZ &
} %nOBsln
68)z`JI|<)
public static interface Sort { KzeA+PI
public void sort(int[] data); (LRv c!`"
} jfqWcX.X=
O`t ]#
public static void swap(int[] data, int i, int j) { * 2T&pX
int temp = data; p`Omcl~Q
data = data[j]; +2B{"Czm
data[j] = temp; k%:]PQjYT
} Tr/wG
} Q-O:L