[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; X|eZpIA45
} xLOQu.
int i1=l; DHw)]WB M
int i2=mid+1; d,JDfG)
for(int cur=l;cur<=r;cur++){ OVe0{} j
if(i1==mid+1) \'*M }G
data[cur]=temp[i2++]; }shxEsq
else if(i2>r) ozRTY9S _;
data[cur]=temp[i1++]; N~mr@rXC
else if(temp[i1] data[cur]=temp[i1++]; l$/lbwi%
else C=r2fc~w
data[cur]=temp[i2++]; Em@:QmEN
} 9iZio3m
} Xzf,S;XV~
0zq'Nf?#3
} S\&3t}_
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改进后的归并排序: %g.cE}^
p,$N-22a
package org.rut.util.algorithm.support; \?^2}K/
Z}dK6h5+'
import org.rut.util.algorithm.SortUtil; $%cc[[/U
9 =;mY
/** 4#03x:/<\
* @author treeroot =ZIT!B?4
* @since 2006-2-2 f=R+]XPzz
* @version 1.0 gaY&2
*/ >dt*^}*
public class ImprovedMergeSort implements SortUtil.Sort { Ms(xQ[#+
gK[;"R)4o@
private static final int THRESHOLD = 10; tZ9i/=S
$Xu3s~:S
/* Ytlzn%
* (non-Javadoc) 3$k#bC
* e;6KxvX~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SE]5cJ'>
*/ uD&B{c+a
public void sort(int[] data) { rXX>I;`&
int[] temp=new int[data.length]; PWpt\g
mergeSort(data,temp,0,data.length-1); /^BC Qaj
} = (F
<s'de$[
private void mergeSort(int[] data, int[] temp, int l, int r) { "+"=iwEAz
int i, j, k; \@:,A]
int mid = (l + r) / 2; Y7VO:o
if (l == r) sV
return; .Q*X5Fc
if ((mid - l) >= THRESHOLD) }#O!GG{
mergeSort(data, temp, l, mid); ^QRg9s,T<
else #]@HsVXh7
insertSort(data, l, mid - l + 1); @dDeOnF
if ((r - mid) > THRESHOLD) pFd8p@m_2
mergeSort(data, temp, mid + 1, r); LSJ?;Zg(=z
else d]l8ei@>h
insertSort(data, mid + 1, r - mid); e{P v:jl
-Ks>s
for (i = l; i <= mid; i++) { w6% Q"%rp
temp = data; m.e]tTe
} )?*YrWO{
for (j = 1; j <= r - mid; j++) { I9*cEZ!l=e
temp[r - j + 1] = data[j + mid]; n~*".ZC'Y
} =^nb+}Nz(
int a = temp[l]; B )r-,M
int b = temp[r]; A IP~A]T
for (i = l, j = r, k = l; k <= r; k++) { az(<<2=
if (a < b) { (CmK>"C+
data[k] = temp[i++]; >M,oyM"s
a = temp; $RaN@& Wm
} else { *glZb;_
data[k] = temp[j--]; +$,Re.WnP
b = temp[j]; O<gfZ>
} T pkSY`T
} 7^q~a(j
} fGo4&( U
@p+;iS1}
/** xAQtX=FoX+
* @param data V8?}I)#(7
* @param l K9lgDk"i
* @param i %z><)7
*/ iQwQ5m!d &
private void insertSort(int[] data, int start, int len) { yGZsNd {a&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S(Yd.Sp
} \c=I!<9
} {*ak>Wud
} $cCC 1=dW
} V#t_gS
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堆排序： Kx__&a
ji"g)d6
package org.rut.util.algorithm.support; 7RAB"T;?Q
ISbs l=F
import org.rut.util.algorithm.SortUtil; &],uD3:5O
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/** `Lf'/q
* @author treeroot !>8~R2
* @since 2006-2-2 ;;Q^/rkC
* @version 1.0 )O]T}eI
*/ @;Ttdwg#J
public class HeapSort implements SortUtil.Sort{ 6o3 bq|
kN1MPd4Yh
/* (non-Javadoc) NO"PO @&Wk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ccf/hA#mb
*/ +eM${JyXH
public void sort(int[] data) { XpIiJry!6
MaxHeap h=new MaxHeap(); a&y^Ps6=
h.init(data); c7Z4u|G
for(int i=0;i h.remove(); Zp_(vOc
System.arraycopy(h.queue,1,data,0,data.length); -Mt 5< s
} [4Z 31v>
XpQOl
private static class MaxHeap{ S&op|Z)1
U=on}W3V2
void init(int[] data){ T(4d5 fY
this.queue=new int[data.length+1]; <qCa9@Ea
for(int i=0;i queue[++size]=data; Hd|l6/[xz
fixUp(size); 7io["zW
} :$5A3i
} z*y!Ml1
S2~cAhR|M
private int size=0; nR!e(
30Q p^)K
private int[] queue; 0&.CAHb}
]Z JoC!u
public int get() { |D3u"Y!:^
return queue[1]; Q M,!-~t
} &K)8
weitDr6
public void remove() { I$Nh|eM
SortUtil.swap(queue,1,size--); o_b[*
fixDown(1); cPGlT"
} |m19fg3u
file://fixdown PJnC
private void fixDown(int k) { ;|N:FG
int j; Tt[zSlIMx
while ((j = k << 1) <= size) { BG{f)2F\
if (j < size %26amp;%26amp; queue[j] j++; 'm%{Rz>j
if (queue[k]>queue[j]) file://不用交换 R;& >PFmq
break; 8#I>`z^F
SortUtil.swap(queue,j,k); I-7LT?r
k = j; W+nu=iQ!
} SGd]o"VF
} @u3`lhUcT
private void fixUp(int k) { MfTLa)Rz
while (k > 1) { #c!:&9oU
int j = k >> 1; NzRvbj]
if (queue[j]>queue[k]) jXcJ/g(X3
break; )n/%P4l
SortUtil.swap(queue,j,k); QaX.Av
k = j; lG*Rw-?a
} 5:Qz
} od;-D~
bP,<^zA|X
} r@r%qkh(.@
0r]n 0?x
} 0QQss
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SortUtil： yu?5t?vf
XGlt^<`
package org.rut.util.algorithm; Fc[KIG3@
ffCDO\i({
import org.rut.util.algorithm.support.BubbleSort; E'5*w6
import org.rut.util.algorithm.support.HeapSort; f49kf**
import org.rut.util.algorithm.support.ImprovedMergeSort; @|!4X(2
import org.rut.util.algorithm.support.ImprovedQuickSort; |J`EM7qMK
import org.rut.util.algorithm.support.InsertSort; TyxIlI4"
import org.rut.util.algorithm.support.MergeSort; :-&|QVH
import org.rut.util.algorithm.support.QuickSort; -"(*'hD
import org.rut.util.algorithm.support.SelectionSort; r^9l/H~$
import org.rut.util.algorithm.support.ShellSort; BEZ~<E&0H
\?bV\/GBR
/** D+8d^-:
* @author treeroot w$gvgz
* @since 2006-2-2 R^Rc!G}
* @version 1.0 (su,=Z
*/ r4.6W[|d
public class SortUtil { T&U}}iWN
public final static int INSERT = 1; eK8H5YE
public final static int BUBBLE = 2; ia6 jiW x
public final static int SELECTION = 3; U~ {k_'-i
public final static int SHELL = 4; ,OZ
public final static int QUICK = 5; *7Dba5B
public final static int IMPROVED_QUICK = 6; P-m_],
public final static int MERGE = 7; ]A4=/6`g?b
public final static int IMPROVED_MERGE = 8; {f*Y}/@
public final static int HEAP = 9; OhF55,[
~{x1/eH
public static void sort(int[] data) { 3F9V,zWtTi
sort(data, IMPROVED_QUICK); ;5a$OM
} O5dS$[`j\p
private static String[] name={ <H[w0Z$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \u=d`}E
}; `At.$3B
2Gyq40
private static Sort[] impl=new Sort[]{ $CcjuPsK
new InsertSort(), %wD#[<BGn>
new BubbleSort(), yCX5 5:
new SelectionSort(), l\U Q2i
new ShellSort(), 'Kelq$dn#
new QuickSort(), 68%aDs
new ImprovedQuickSort(), *4O=4F)x
new MergeSort(), Wzq W1<*`
new ImprovedMergeSort(), 5C w( 4.
new HeapSort() p^l#Wq5
}; uH_KOiF
dg D-"-O
public static String toString(int algorithm){ mY|c7}>V;
return name[algorithm-1]; sA0Ho6
} zI88IM7/
!E7gIqo
public static void sort(int[] data, int algorithm) { KbJ6U75|f
impl[algorithm-1].sort(data); ^0,}y]5p
} aRd~T6I
o'Bd. B
public static interface Sort { 6:1`lsP
public void sort(int[] data); tldT(E6
} [i.@q}c~E
V:0IBbh)w
public static void swap(int[] data, int i, int j) { }_Bo:*9B-o
int temp = data; lH fZw})d
data = data[j]; gt4GN`-k
data[j] = temp; ]aN9mT N
} O[X*F2LC4
} g 2Fg