[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; ]*zG*.C
} IN3-ZNx
int i1=l; 1p~ORQ
int i2=mid+1; nmn/4>
for(int cur=l;cur<=r;cur++){ GpTZp#~;
if(i1==mid+1) .$peq
data[cur]=temp[i2++]; @$kO7k0{g
else if(i2>r) \2+ngq)
data[cur]=temp[i1++]; CRCy)AS,t
else if(temp[i1] data[cur]=temp[i1++]; uq[5 om"
else .Bkfe{^
data[cur]=temp[i2++]; wg[ +NWJ
} L *\[;.mk
} 9j^rFG!n
CC^]Y.9
} 9LPXhxNwB
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改进后的归并排序: }ACg#;>/+
X,+a 6F
package org.rut.util.algorithm.support; qQ]fM$!
~m<K5K6 V
import org.rut.util.algorithm.SortUtil; (t3gNin
H.iCYD_=
/** >A@yF?
* @author treeroot f{2UL ?y
* @since 2006-2-2 +a,#BSt
* @version 1.0 #QsJr_=
*/ Hc8^w6S1@
public class ImprovedMergeSort implements SortUtil.Sort { u= dj3q
&bJBsd@Os
private static final int THRESHOLD = 10; 5q@s6_"{
eb}XooX
/* PdVY tK%
* (non-Javadoc) M*n94L=Sg&
* ;\}dQsX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6@lZVM)E
*/ VTR4uT-
public void sort(int[] data) { z l`m1k-X
int[] temp=new int[data.length]; ,#BD/dF
mergeSort(data,temp,0,data.length-1); sKW~+]
} T]Q4=xsv
*6<4ECa7C
private void mergeSort(int[] data, int[] temp, int l, int r) { ).GM0-y
int i, j, k; whe%o
int mid = (l + r) / 2; eK(k;$4\^Y
if (l == r) c]1AM)xo
return; l#C<bDw
if ((mid - l) >= THRESHOLD) 1F>8#+B/W
mergeSort(data, temp, l, mid); wKdWE`|y
else 6K7lQ!#}Q
insertSort(data, l, mid - l + 1); h3E}Sa(MQ:
if ((r - mid) > THRESHOLD) lGK7XAx,
mergeSort(data, temp, mid + 1, r); 7Oe$Ou
else z7BFkZ6+
insertSort(data, mid + 1, r - mid); SN")u
^& *;]S`
for (i = l; i <= mid; i++) { \c{sG\ >
temp = data; oH4zW5
} /+B6oE>8
for (j = 1; j <= r - mid; j++) { MV3K'<Y
temp[r - j + 1] = data[j + mid]; kz}Bc F
} )$1j"mV
int a = temp[l]; s+_8U}R
int b = temp[r]; J*K=tA
for (i = l, j = r, k = l; k <= r; k++) { -]}#Z:&
if (a < b) { lmUCrs37
data[k] = temp[i++]; 5`&@3 m9/
a = temp; f'"PQr^9
} else { /T {R\
data[k] = temp[j--]; ~C>;0a;<:
b = temp[j]; W\0u[IV.x
} ' xaPahx;
} %j@/Tx/
} *qL'WrB1
M`Wk@t6>
/** P()n=&XO6
* @param data yYe>a^r4R
* @param l ^^ SMr l
* @param i dg*xo9Xi`
*/ x]hG2on!
private void insertSort(int[] data, int start, int len) { qmPu D/c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )gU:Up24|"
} +-TEB
} 3NZK$d=4
} %*<Wf4P"
} CUc,
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堆排序： '-~J.8-</
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package org.rut.util.algorithm.support; Z= -fL
p|qLr9\A
import org.rut.util.algorithm.SortUtil; UWqiA`,
]X7_ji(l,
/** .i?{h/9y
* @author treeroot N&G(`]
* @since 2006-2-2 k[pk R{e
* @version 1.0 *'-C/
*/ ;#Qv )kS*
public class HeapSort implements SortUtil.Sort{ bhg6p$411
6Rif&W.xy
/* (non-Javadoc) 4/\Ynb.L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l| \ -d
*/ txMC^-J2l
public void sort(int[] data) { 9' H\-
MaxHeap h=new MaxHeap(); o,_F;ZhE
h.init(data); WFFd3TN%<
for(int i=0;i h.remove(); pcOKC0b.
System.arraycopy(h.queue,1,data,0,data.length); ZF#lh]
} e{4e<hd
d6m&nj
private static class MaxHeap{ 1W0[|Hf2v*
;*nzb!u\\
void init(int[] data){ #@V<{/;49
this.queue=new int[data.length+1]; .2rpQa/h
for(int i=0;i queue[++size]=data; ;sUvY*Bcm
fixUp(size); yO\bVu5V
} #jxPh!%9
} J.g6<n
x6\VIP"9L
private int size=0; is%ef
n^55G>"0|
private int[] queue; 'tQp&pj
e<A>??h^
public int get() { N48X[Q*
return queue[1]; k $ SMQ6
} v3n T@ra'
KL(sVj^e
public void remove() { >x~Qa@s;
SortUtil.swap(queue,1,size--); 0&kmP '
fixDown(1); /{[tU-}qJ
} hCX/k<}I
file://fixdown ?mVSc/
private void fixDown(int k) { u]9 #d^%V
int j; o?= &kx
while ((j = k << 1) <= size) { Jfv'M<I
if (j < size %26amp;%26amp; queue[j] j++; qM Qu!%o
if (queue[k]>queue[j]) file://不用交换 "~Kph0-
break; >wYmx4W>
SortUtil.swap(queue,j,k); UT 7'-
k = j; S5L0[SZ$!
} #+h#b%8
} s nNd7v.U6
private void fixUp(int k) { 3:sx%Ci/2
while (k > 1) { @b5$WKPX
int j = k >> 1; Y@Ry oJ
if (queue[j]>queue[k]) t!FC)iY
break; ;3Z?MQe"NQ
SortUtil.swap(queue,j,k); ^x(s!4d]
k = j; I&^hG\D
} l]
} X*Q<REDB
u Vv%k5
} G_k_qP^:
z-]ND
} hVZS6gU,x
7a/ BS(kq<
SortUtil： &u<%%b|
d?/g5[
package org.rut.util.algorithm; pma=*
R$eEW"]
import org.rut.util.algorithm.support.BubbleSort; 7coVl$_Zl
import org.rut.util.algorithm.support.HeapSort; zqXDD; w3
import org.rut.util.algorithm.support.ImprovedMergeSort; r#}o +3*
import org.rut.util.algorithm.support.ImprovedQuickSort; = ~*Vfx
import org.rut.util.algorithm.support.InsertSort; u<Ch]m+
import org.rut.util.algorithm.support.MergeSort; _3g!_
import org.rut.util.algorithm.support.QuickSort; "-IF_Hid
import org.rut.util.algorithm.support.SelectionSort; .%0a
import org.rut.util.algorithm.support.ShellSort; olHmRJ
NQOf\.#g
/** (\ |Go-2G
* @author treeroot rof9Rxxe-
* @since 2006-2-2 ME5M;bz(
* @version 1.0 PyQ\O*
*/ G ,`]2'(@
public class SortUtil { c[vFh0s"m
public final static int INSERT = 1; ?l|&JgJ$
public final static int BUBBLE = 2; v(uNqX.BC
public final static int SELECTION = 3; @y eAM7
public final static int SHELL = 4; \^'-=8<*>
public final static int QUICK = 5; t`eIkq|NxI
public final static int IMPROVED_QUICK = 6; T$DFTr\\
public final static int MERGE = 7; :;]O;RXt
public final static int IMPROVED_MERGE = 8; r'*#i>PkQD
public final static int HEAP = 9; L?Ih;
V72?E%d0
public static void sort(int[] data) { #2*R0_b
sort(data, IMPROVED_QUICK); /p}pdXS
} Y$ KR\ m
private static String[] name={ =|c7#GaiF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (@*%moo
}; [KW)z#`*
e?GzvM'2
private static Sort[] impl=new Sort[]{ ^>fr+3a"P
new InsertSort(), 3@0!]z^W
new BubbleSort(), *^Z -4
new SelectionSort(), GJF ,w{J
new ShellSort(), y"_rDj`
new QuickSort(), O^3XhTW^\~
new ImprovedQuickSort(), aOUTKyR ~
new MergeSort(), *iSE)[W
new ImprovedMergeSort(), $>wN:uN(
new HeapSort() + :b"0pu-H
}; '+GYw$
#~r+Z[(,p
public static String toString(int algorithm){ F}B2nL&
return name[algorithm-1]; {XnBj}C
} <#./q LSR
3CSwcD
public static void sort(int[] data, int algorithm) { A(+V{1L'
impl[algorithm-1].sort(data); Hm~.u.)\.
} iQiXwEAi[
;hd%wmE
public static interface Sort { +.u HY`A
public void sort(int[] data); \5HVX/
} (;N#Gqb6l
=ATQ2\T$m
public static void swap(int[] data, int i, int j) { \MAv's4b@
int temp = data; {Q^ -
data = data[j]; 83)m#
data[j] = temp; $?OQtz@
} #zb67mg~
} M2qor.d