[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; Ck>]+rl
} #3{{[i(;i
int i1=l; vT @25
int i2=mid+1; W`P>vK@=
for(int cur=l;cur<=r;cur++){ :."6g)T
if(i1==mid+1) I[?bM-
data[cur]=temp[i2++]; sl(go^
else if(i2>r) yhI;FNSf
data[cur]=temp[i1++]; ]rNxvFN*j
else if(temp[i1] data[cur]=temp[i1++]; lgD%
else g>#}(u!PH
data[cur]=temp[i2++]; | +uc;[`
} th<>%e}5c
} Oqt{ uTI~
d(@ ov^e-
} yW\kmv.O
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改进后的归并排序: rZ)7(0BBs
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package org.rut.util.algorithm.support; {t.S_|IE
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import org.rut.util.algorithm.SortUtil; &Nw|(z&$
bE@Eiac
/** .TDg`O24c,
* @author treeroot Sqyju3Yp
* @since 2006-2-2 Eau V
* @version 1.0 +?[s"(
*/ )>^Ge9d]
public class ImprovedMergeSort implements SortUtil.Sort { ]"htOO
\rg;xZa5
private static final int THRESHOLD = 10; ?<5KLvGv
QAMcI:5
/* :XoR~syT
* (non-Javadoc) IS`ADDU[S
* baL<|& c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =P_*.SgR
*/ Sfp-ns32%A
public void sort(int[] data) { y+V>,W)r7
int[] temp=new int[data.length]; cM4{ e^
mergeSort(data,temp,0,data.length-1); #yU"n-eLR
} %o0H#7'
${}9/(x/^
private void mergeSort(int[] data, int[] temp, int l, int r) { qn,fx6v4
int i, j, k; +x/vZXtOK
int mid = (l + r) / 2; }RYPr
if (l == r) -}( o+!nl
return; DRTT3;,N
if ((mid - l) >= THRESHOLD) TZ3gJ6 Cb
mergeSort(data, temp, l, mid); T|j=,2_
else Pj_DI)^
insertSort(data, l, mid - l + 1); MZh?MaBz06
if ((r - mid) > THRESHOLD) \:'6_K
mergeSort(data, temp, mid + 1, r); I)0_0JXs
else L/%{,7l<^?
insertSort(data, mid + 1, r - mid); Y=O-^fL
1CM8P3
for (i = l; i <= mid; i++) { )q\6pO@
temp = data; KoWG:~>|
} #`l&HV
for (j = 1; j <= r - mid; j++) { I3izLi
temp[r - j + 1] = data[j + mid]; x9 n(3Oa
} - DYH>!
int a = temp[l]; vQy<%[QO
int b = temp[r]; }w2Et
for (i = l, j = r, k = l; k <= r; k++) { D0MW~Y6{
if (a < b) { 3H4T*&9;n
data[k] = temp[i++]; >IA1 \?(
a = temp; @+)T"5_Y[
} else { ]1|7V|N6
data[k] = temp[j--]; \q24E3zS&
b = temp[j]; tK'9%yA\
} qSD3]Dv"
} )7Qp9Fxo
} /11CC \
q|IU+r:! 3
/** (?lT @RY/
* @param data yJlRW!@&:
* @param l RyM29uD
* @param i IjQgmS~G
*/ FL&Y/5
private void insertSort(int[] data, int start, int len) { !x||ObW\H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )nK+`{;@!
} 1=!2|D:C)i
} !YlEXaS
} * kUb[
} 5lM 3In@
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堆排序： TIaiJvo
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package org.rut.util.algorithm.support; [9Tnp]q
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import org.rut.util.algorithm.SortUtil; 5LU7}v~/
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/** huR ^l
* @author treeroot q./jYe
* @since 2006-2-2 KZaiy*>)
* @version 1.0 [ :Sl~
*/ P=9UK`n
public class HeapSort implements SortUtil.Sort{ &zVXd
IlI5xkJ(
/* (non-Javadoc) Mii&doU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9y} J|z
*/ > %Hw008
public void sort(int[] data) { 6x/o j`_[
MaxHeap h=new MaxHeap(); V>UlL&V
h.init(data); MU:v& sk
for(int i=0;i h.remove(); hgwS_L
System.arraycopy(h.queue,1,data,0,data.length); HW'I$ .
} 'dv(
s.KfMJ"u[
private static class MaxHeap{ vkM_a}%<
$"}*#<Z
void init(int[] data){ IF<T{/MA
this.queue=new int[data.length+1]; |%3>i"Y@AK
for(int i=0;i queue[++size]=data; 4$ah~E>,t
fixUp(size); LfCgvq6/pO
} 1-.i^Hal
} 7qWa>fX
/#L4ec-'
private int size=0; - ku8n%u
yZNg[KH
private int[] queue; o"A?Aq
Fta=yH}
public int get() { o>m*e7l,
return queue[1]; U9Q[K`
} *7#5pT~
&XXr5ne~C
public void remove() { L&]{GNw
SortUtil.swap(queue,1,size--); Imyw-8/;
fixDown(1); 8|+@A1)&4
} LA(/UA3Izd
file://fixdown kK0zb{
private void fixDown(int k) { 9'|_1Q.b^
int j; J%!vhQ
while ((j = k << 1) <= size) { 9J<vkxG9`
if (j < size %26amp;%26amp; queue[j] j++; IEI&PRD
if (queue[k]>queue[j]) file://不用交换 1$:O9{F
break; <Skf n`).
SortUtil.swap(queue,j,k); xf|C{XV@H
k = j; u%OLXb
} #H5+8W
} 77]lpmC
private void fixUp(int k) { tZ*>S]qD
while (k > 1) { lACS^(
int j = k >> 1; kn`O3cW/
if (queue[j]>queue[k]) #&z'?x^a
break; $`lGPi(Jc
SortUtil.swap(queue,j,k); UjyrmQf
k = j; 9PaV*S(\TR
} , 0?_? GO
} ]IDhE{
V~Jt
} Tq6\oIBkV
e#WASHZN
} OL@$RTh
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SortUtil： [8 23w.{]#
6J cXhlB`
package org.rut.util.algorithm; wX!0KxR/Z
SWT)M1O2
import org.rut.util.algorithm.support.BubbleSort; \vpX6!T
import org.rut.util.algorithm.support.HeapSort; *hpS/g/3\
import org.rut.util.algorithm.support.ImprovedMergeSort; R(f%*S4
import org.rut.util.algorithm.support.ImprovedQuickSort; ndk~(ex|j
import org.rut.util.algorithm.support.InsertSort; wawJZ+V
import org.rut.util.algorithm.support.MergeSort; lt\Bm<"z!1
import org.rut.util.algorithm.support.QuickSort; &F'n >QT9q
import org.rut.util.algorithm.support.SelectionSort; M`)3(|4
import org.rut.util.algorithm.support.ShellSort; B@' OUcUR
[3x*47o"z
/** 20:![/7:!
* @author treeroot <" 0b8 Z
* @since 2006-2-2 P#rS.CIh
* @version 1.0 X'xnJtk
*/ QVl"l'e8
public class SortUtil { _!?a9
public final static int INSERT = 1; iWkC:fQz
public final static int BUBBLE = 2; N7)K\)DS!z
public final static int SELECTION = 3; 1DH P5q
public final static int SHELL = 4; sy6[%8D$
public final static int QUICK = 5; 2cZgG^
public final static int IMPROVED_QUICK = 6; ajf(Ii\/
public final static int MERGE = 7; Pv*]AF;9pQ
public final static int IMPROVED_MERGE = 8; z1.vnGP
public final static int HEAP = 9; :1v.Jk
A3J=,aRI_v
public static void sort(int[] data) { )vY)Mg
sort(data, IMPROVED_QUICK); / w[Tu
} yEkwdx5!(
private static String[] name={ {GGP8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AyOy&]g
}; _Y)Wi[
=t.T9'{
private static Sort[] impl=new Sort[]{ Xs~IoU
new InsertSort(), }yd!UU
new BubbleSort(), 1`~.!yd8(
new SelectionSort(), J M;WCV%NM
new ShellSort(), F^?DnZs
new QuickSort(), E7I$GD
new ImprovedQuickSort(), IUD@Kf]S
new MergeSort(), Bt(nm>Ng
new ImprovedMergeSort(), Sb}=j;F
new HeapSort() Kv ajk~
}; \Y6r !D9
6yC4rX!a
public static String toString(int algorithm){ \]3[Xw-$
return name[algorithm-1]; LYyud
} &fE2zTz
EQ>@K-R
public static void sort(int[] data, int algorithm) { +.-mqtM
impl[algorithm-1].sort(data); ]UGk"s5A
} h1$75E?,
h"f_T [
public static interface Sort { ,hp8b$
public void sort(int[] data); l4U
} c/l^;6O/!\
\4O_@d`A
public static void swap(int[] data, int i, int j) { C>QWV[F
int temp = data; `(E$-m-~jH
data = data[j]; bzECNi5^
data[j] = temp; =}Yz[-I
} O<MO2U+^x
} Y<_;8%S