[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; AdRX`[ik
} ^uv<6
int i1=l; mKo C.J
int i2=mid+1; [ i#zP
for(int cur=l;cur<=r;cur++){ 4vBL6!z:Z
if(i1==mid+1) ~.;< Bj
data[cur]=temp[i2++]; ;JZS^Wa
else if(i2>r) -46C!6a
data[cur]=temp[i1++]; J+d1&Tw&
else if(temp[i1] data[cur]=temp[i1++]; ok|qyN+
else Z R/#V7Pj
data[cur]=temp[i2++]; fd-q3_f
} OO[F E3F
} z~`b\A,$
}!IL]0q
} P(F+f`T
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改进后的归并排序: #9K-7je;j
a7N!B'y
package org.rut.util.algorithm.support; 3Zi@A4Wu
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import org.rut.util.algorithm.SortUtil; lz1wO5%h
"*G.EiLq
/** -D6exTxh"
* @author treeroot vWGwVH/K
* @since 2006-2-2 4:gRr
* @version 1.0 }.s~T#v
*/ M|:UwqV>
public class ImprovedMergeSort implements SortUtil.Sort { gz3pX#S
{nLjY|*
private static final int THRESHOLD = 10; Qxj JN^Q
,}K<*t[I
/* [jmd
* (non-Javadoc) !.d@L6
* 9k{PBAP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b0oMs=uBn
*/ -[-wkC8a
public void sort(int[] data) { RjN{%YkXe
int[] temp=new int[data.length]; ..rOsg{
mergeSort(data,temp,0,data.length-1); "~'b
} n=[/Z!
u*hSj)vr1
private void mergeSort(int[] data, int[] temp, int l, int r) { Z?\>JM >;
int i, j, k; !"Oh36
int mid = (l + r) / 2; :0h_K
if (l == r) IIbYfPiO
return; h<$MyN4]g
if ((mid - l) >= THRESHOLD) |P%Jw,}]9
mergeSort(data, temp, l, mid); }sxYxn~
else thhwN A
insertSort(data, l, mid - l + 1); Dc,I7F|%
if ((r - mid) > THRESHOLD) Hw4%uS==V
mergeSort(data, temp, mid + 1, r); E~6c-Lw
else vh$%9ed
insertSort(data, mid + 1, r - mid); %f]:I
<_7*67{
for (i = l; i <= mid; i++) { P'_H/r/#
temp = data; NX}<*b/
} R6(oZph
for (j = 1; j <= r - mid; j++) { 9g<7i
temp[r - j + 1] = data[j + mid]; =zz~kon9
} T:; 2
int a = temp[l]; ^0 -:G6H
int b = temp[r]; :5{wf Am
for (i = l, j = r, k = l; k <= r; k++) { DP|D\+YyYA
if (a < b) { xoN3
data[k] = temp[i++]; i*Z"Me
a = temp; <*qnY7c&N;
} else { #?S^kM-0
data[k] = temp[j--]; 6ZP"p<xX
b = temp[j]; Q637N|01
} `G}TG(
} (=om,g}
} maNl^i
3eF-8Z(f
/** sc}~8T
* @param data Sn|BlXrey
* @param l X<I+&Zi
* @param i X"fb;sGT
*/ 5;YMqUkw
private void insertSort(int[] data, int start, int len) { Ck)*&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s6@DGSJ
} ATK_DEAu
} 6}FP
} C)`Fv=]R
} 85LAYaw
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堆排序： j3{D^|0bP
yjF1}SQ
package org.rut.util.algorithm.support; 7Mg=b%IYs
ci?qT,&
import org.rut.util.algorithm.SortUtil; 0|{u{w@!`
%yv<y+yP~
/** ]d! UJ&<?
* @author treeroot 5?]hd*8
* @since 2006-2-2 ,Vt/(x-
* @version 1.0 1ng!G 7g
*/ ?j"KV_
public class HeapSort implements SortUtil.Sort{ ?B2] -+Y
Gz,i~XX
/* (non-Javadoc) {?:X8&Sf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hl{S]]z
*/ WE:24b6
public void sort(int[] data) { 8Djc c z
MaxHeap h=new MaxHeap(); *%%g{ 3$
h.init(data); VHIOwzC
for(int i=0;i h.remove(); 0Ziw_S\d&s
System.arraycopy(h.queue,1,data,0,data.length); P\1L7%*lU
} ;V*l.gr'2
a,k>Q`
private static class MaxHeap{ i3@)W4{
~a ]+#D
void init(int[] data){ x|pg"v&[
this.queue=new int[data.length+1]; _({hc+9p
for(int i=0;i queue[++size]=data; {xXsBh Y
fixUp(size); >n'o*gZM
} 1H6<[iHW
} "@iK' c^
:bwjJ}F
private int size=0; pKpUXfQu
X-K=!pET
private int[] queue; wn/_}]T
L~lxXTG\
public int get() { >\KNM@'KI
return queue[1]; u{['<r;I
} UQ?XqgUM
Ya3C#=
public void remove() { (k5We!4[1
SortUtil.swap(queue,1,size--); 0i!uUF
fixDown(1); D1zBsi94D
} p@xf^[50k
file://fixdown _m5uDF?[
private void fixDown(int k) { _Kl_61k
int j; Oo5w?+t
while ((j = k << 1) <= size) { %4et&zRC
if (j < size %26amp;%26amp; queue[j] j++; J^SdH&%Z
if (queue[k]>queue[j]) file://不用交换 a_f~N1kq
break; cW@Zd5&0S
SortUtil.swap(queue,j,k); +ElfZ4
k = j; /Z'L^L%R
} K|zZS%?$
} 6jE|
private void fixUp(int k) { &Sw%<N*r
while (k > 1) { u0|8Tgf
int j = k >> 1; ?XrQ53
if (queue[j]>queue[k]) I,>-tGK
break; We$:&K0
SortUtil.swap(queue,j,k); v$7QIl_/7
k = j; $q6BP'7
} 7K,-01-:
} _x%7@.TB
y{ibO}s
} uwzvbgup?
[$0p+1
} g!@<n1 L
q rJ`1
SortUtil： n.'8A(,r3
O#:$^#j&
package org.rut.util.algorithm; \F1_lq;K
WIC/AL'
import org.rut.util.algorithm.support.BubbleSort; k1w_[w[
import org.rut.util.algorithm.support.HeapSort; 6& e3Nt
import org.rut.util.algorithm.support.ImprovedMergeSort; i2E)P x
import org.rut.util.algorithm.support.ImprovedQuickSort; ehzM)uK
import org.rut.util.algorithm.support.InsertSort; "c3Grfoz
import org.rut.util.algorithm.support.MergeSort; 0b+Wc43}K
import org.rut.util.algorithm.support.QuickSort; Jj!vh{
import org.rut.util.algorithm.support.SelectionSort; I4/8 _)b^
import org.rut.util.algorithm.support.ShellSort; "6MVvpy"
QdT}wkX
/** z>58dA@f
* @author treeroot N60rgSzI
* @since 2006-2-2 @e(o129
* @version 1.0 }Lc-7[/
*/ nzd2zY>V
public class SortUtil { Wk~WOzr}^
public final static int INSERT = 1; 0h#lJS*
public final static int BUBBLE = 2; UK595n;P
public final static int SELECTION = 3; _"?.!
public final static int SHELL = 4; %<k2#6K
public final static int QUICK = 5; Gw>^[dmt!
public final static int IMPROVED_QUICK = 6; FQu8vwV6>
public final static int MERGE = 7; )Xk0VDNp$/
public final static int IMPROVED_MERGE = 8; t2/#&J]
public final static int HEAP = 9; 6IBgt!=,
Yw4n-0g
public static void sort(int[] data) { $7O}S.x
sort(data, IMPROVED_QUICK); fol,xMc&
} tNO-e|~'
private static String[] name={ HJLu'KY}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M2PAy! J
}; `NCwK6/i
CJ1 7n
private static Sort[] impl=new Sort[]{ fsJ9bQm/
new InsertSort(), U{7w#>V .
new BubbleSort(), ~HTmO;HNf"
new SelectionSort(), xf<at->
new ShellSort(), mw_~*Nc'9
new QuickSort(), tjIl-IQ
new ImprovedQuickSort(), a|%J=k>>
new MergeSort(), 9>l*lCA
new ImprovedMergeSort(), Ov5"
new HeapSort() w`4=_J=GO
}; ^V?<K.F
^8 zR
public static String toString(int algorithm){ rf $QxJ
return name[algorithm-1]; o)Iff)m$
} $;1#To
3,p]/Z_
public static void sort(int[] data, int algorithm) { +MR.>"
impl[algorithm-1].sort(data); 8$")%_1]
} 9!6f-K
j/R[<47
public static interface Sort { f[@77m*
public void sort(int[] data); XG}C+;4Aw
} z_F-T=_
kDEPs$^
public static void swap(int[] data, int i, int j) { 5Sm}nH
int temp = data; a][f
data = data[j]; G9Y#kBr
data[j] = temp; .X@FXx&
} )Ub_@)X3%l
} kh {p%<r{