[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; ! TRiFD
} %-SP
int i1=l; 97&6iTYA
int i2=mid+1; 1R:h$*-z
for(int cur=l;cur<=r;cur++){ <T&$1m{
if(i1==mid+1) nrxN_0 R%
data[cur]=temp[i2++]; @a3<fmJ
else if(i2>r) *Js<VR
data[cur]=temp[i1++]; jBB<{VV|
else if(temp[i1] data[cur]=temp[i1++]; ~_oTEXT^O
else ;x7SY;0*
data[cur]=temp[i2++]; ?IWLl
} UHg^F4>4
} 9\n}!{@i
x Dr^&rC
} Uexb>|
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改进后的归并排序: dGfWRqS]
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package org.rut.util.algorithm.support; Fb}9cpz{
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import org.rut.util.algorithm.SortUtil; dy0!Zz
0b|!S/*A3
/** w5|"cD#8A
* @author treeroot vTP_vsdeG
* @since 2006-2-2 )a6i8b3
* @version 1.0 gGX/p6"
*/ bEE:6)]G
public class ImprovedMergeSort implements SortUtil.Sort { eQeNlCG
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private static final int THRESHOLD = 10; !6}Cs3.
un/R7"
/* ~cez+VQe
* (non-Javadoc) .Q#Eb %%
* M6I1`Lpf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ae<KUThm.
*/ ]#qdA(Kl
public void sort(int[] data) { C8jZcs#4
int[] temp=new int[data.length]; kP6r=HH@
mergeSort(data,temp,0,data.length-1); l&yR-FJ7KY
} <)&ykcB
h'}5"m
private void mergeSort(int[] data, int[] temp, int l, int r) { :G`_IB\
int i, j, k; yA_d${n
int mid = (l + r) / 2; 0O:TKgb&C.
if (l == r) D"Xm9 (
return; R5FjJ>JE
if ((mid - l) >= THRESHOLD) mB,7YZv
mergeSort(data, temp, l, mid); X >**M
else {u1t.+
insertSort(data, l, mid - l + 1); *83+!DV|
if ((r - mid) > THRESHOLD) +`4|,K7'
mergeSort(data, temp, mid + 1, r); 1ERz:\
else +g;G*EP7*
insertSort(data, mid + 1, r - mid); =1,g#HS
r({(;
for (i = l; i <= mid; i++) { *kIJv?%_}
temp = data; C$hsR&
} o+vf
for (j = 1; j <= r - mid; j++) { YnMph0\Y^
temp[r - j + 1] = data[j + mid]; bw[!f4~
} >i.+v[)#
int a = temp[l]; (5I]umtge
int b = temp[r]; m1<B6*iG"
for (i = l, j = r, k = l; k <= r; k++) { );6zV_^!
if (a < b) { 3646.i[D
data[k] = temp[i++]; Y'Af I^K
a = temp; |#sP1w'l]
} else { Vr^wesT\Hx
data[k] = temp[j--]; N8vWwN[3
b = temp[j]; 9UwDa`^
} V- vVb
} yJrPb"
} $W2g2[+
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/** <)}*S
* @param data a0n F U
* @param l sv[)?1S
* @param i Oo0$n]*;W
*/ AV'>
private void insertSort(int[] data, int start, int len) { jy*wj7fj1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gg&jb=
} RsY<j& f
} AiyjrEa%
} QA%GK4F70
} |9Y9pked8
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堆排序： mkWIJH
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package org.rut.util.algorithm.support; U/ZbE?it>
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import org.rut.util.algorithm.SortUtil; 4j | vzyc
lDH0bBmd0
/** h!Ka\By8#
* @author treeroot ve.4""\a
* @since 2006-2-2 +F/'+
* @version 1.0 w&H ?;1
*/ %'>. R
public class HeapSort implements SortUtil.Sort{ $a-~ozr`C
`KL`^UqR
/* (non-Javadoc) k&**f_b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )~5`A*Ku
*/ $DMeUA\av
public void sort(int[] data) { a"v D+r7Ol
MaxHeap h=new MaxHeap(); ;6]+/e7O
h.init(data); !~ZL
for(int i=0;i h.remove(); FCIT+8K
System.arraycopy(h.queue,1,data,0,data.length); n8iN/Y<%U
} 1jV^\x0
qV^H vZJ
private static class MaxHeap{ J0>Q+Y
XGUF9arN
void init(int[] data){ j{HxX
this.queue=new int[data.length+1]; :&a|8Wi[W
for(int i=0;i queue[++size]=data; RJWlG'i
fixUp(size); A$oYw(m#
} +(<CE#bb[
} sz)3 z
& IDF9B
private int size=0; D~1nh%x_
;Y~;G7
private int[] queue; 2D-*Z=5^
0]WM:6 h
public int get() { 3v{GP>
return queue[1]; n,0}K+}
} 0zEn`rq&
-1< }_*
public void remove() { lP@9%L
SortUtil.swap(queue,1,size--); 9M7{.XR,
fixDown(1); g<,|Q5bK
} ZSbD4 |_
file://fixdown eag$i.^aS
private void fixDown(int k) { !WY@)qlf
int j; @z2RMEC~
while ((j = k << 1) <= size) { +/Z:L$C6
if (j < size %26amp;%26amp; queue[j] j++; Q0r_+0[7j
if (queue[k]>queue[j]) file://不用交换 <}UqtDF 0
break; NZD X93
SortUtil.swap(queue,j,k); b'ew Od=
k = j; xF,J[Aj
} C ]#R7G
} ];< [Cln%
private void fixUp(int k) { E7*]t_p"
while (k > 1) { 51rM6 BT
int j = k >> 1; NfN#q:w1
if (queue[j]>queue[k]) $GYy[-.`
break; ]];7ozS)X
SortUtil.swap(queue,j,k); 31_5k./
k = j; r%o!P`
} #-kyZ
} ?G3OAx?<
;hKn$' '
} Z1>pOJm
PvA%c<z
} i%z}8GIt'
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SortUtil： T? =jKLPC
mB!81%f%|
package org.rut.util.algorithm; iBc( @EJ
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import org.rut.util.algorithm.support.BubbleSort; gHm^@
import org.rut.util.algorithm.support.HeapSort; Mk^o*L{H
import org.rut.util.algorithm.support.ImprovedMergeSort; IP~g7`Y
import org.rut.util.algorithm.support.ImprovedQuickSort; Ak1f*HGl|
import org.rut.util.algorithm.support.InsertSort; )JZfC&,
import org.rut.util.algorithm.support.MergeSort; #S1)n[
import org.rut.util.algorithm.support.QuickSort; fCTjTlh
import org.rut.util.algorithm.support.SelectionSort; M"P$hb'F
import org.rut.util.algorithm.support.ShellSort; -Y+[`0$'
Oo#wPT;1^(
/** #7g~Um%p
* @author treeroot u{\`*dNx
* @since 2006-2-2 S4tdWA
* @version 1.0 zKI(yC
*/ ^beW*O!
public class SortUtil { xxedezNko
public final static int INSERT = 1; kDm=Cjxv
public final static int BUBBLE = 2; !>! l=Z
public final static int SELECTION = 3; Y[pGaiN:
public final static int SHELL = 4; #ocT4
public final static int QUICK = 5; pM4 j=F
public final static int IMPROVED_QUICK = 6; 2/h Mx-
public final static int MERGE = 7; "cti(0F-d
public final static int IMPROVED_MERGE = 8; LxG :?=O.
public final static int HEAP = 9; tnTr&o#
x-q er-
public static void sort(int[] data) { v|`)~"~
sort(data, IMPROVED_QUICK); ]P 2M
} yhTe*I=Gk
private static String[] name={ $YW z~^f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &18} u~M
}; PAqziq.
B]kz3FF
private static Sort[] impl=new Sort[]{ m(&ZNZK
new InsertSort(), rb9x||
new BubbleSort(), ZM5[ o m
new SelectionSort(), 7IFUsli]
new ShellSort(), &\5T`|~)!
new QuickSort(), =JEnK_@?K\
new ImprovedQuickSort(), 6C
new MergeSort(), 3L#KHTM
new ImprovedMergeSort(), RJGf@am&
new HeapSort() ,.E:mm
}; 3J@#V '
IoA"e@~t
public static String toString(int algorithm){ ofN|%g /
return name[algorithm-1]; ##FN0|e&
} !5[?n3
E|ZY2&J`4
public static void sort(int[] data, int algorithm) { eyy&JjVs
impl[algorithm-1].sort(data); _~6AUwM
} in%+)`'nH7
@P)GDB7A
public static interface Sort { #opFUX-
public void sort(int[] data); lZb1kq%9g
} .'SM|r$
{U&Mo97rzX
public static void swap(int[] data, int i, int j) { S6Kaw
int temp = data; %(n4`@
data = data[j]; c?[A
data[j] = temp; koaH31Q
} ZfMJU
} XD*$$`+#