[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; e0HG"z4
} rm>;B *;
int i1=l; v#.FK:u}
int i2=mid+1; *$x/(!UE
for(int cur=l;cur<=r;cur++){ >\K<q>*
if(i1==mid+1) /d5_-AB(v
data[cur]=temp[i2++]; !Y-MUZ$f
else if(i2>r) kwdmw_
data[cur]=temp[i1++]; ^ 3LM%B
else if(temp[i1] data[cur]=temp[i1++]; $=$I^hV
else Z9ciS";L
data[cur]=temp[i2++]; v@;:aN
} j-ugsV`2=*
} C8cB Lsa[J
{a9Z<P
} ??{(.`}R~
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改进后的归并排序: 9Ps:]Kp!vN
]DdD FLM
package org.rut.util.algorithm.support; 4x=rew>Ew
Mk= tS+
import org.rut.util.algorithm.SortUtil; /a6\G.C5
*}3e'0`
/** jK\2y|&&c
* @author treeroot K;G1cFFyG
* @since 2006-2-2 f3U#|(%(*
* @version 1.0 ;C-5R U V
*/ bslv_OxJ
public class ImprovedMergeSort implements SortUtil.Sort { jHBn^Nly
mwCNfwb:
private static final int THRESHOLD = 10; -B$oq8)n*
{$>*~.Wu
/* OekcU%C
* (non-Javadoc) Kwfrh?
* WUAjb,eo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JiP]FJ;
*/ &6,GX7]Fo
public void sort(int[] data) { *%'4.He7V
int[] temp=new int[data.length]; #O^H?3Q3
mergeSort(data,temp,0,data.length-1); [X)+(-J
} A,MRK#1u
b,7:=-D
private void mergeSort(int[] data, int[] temp, int l, int r) { N{iBVl
int i, j, k; p*W4^2(d
int mid = (l + r) / 2; 5JDqSz{
if (l == r) =ALy.^J=
return; JrseU6N
if ((mid - l) >= THRESHOLD) |]DZc/
mergeSort(data, temp, l, mid); E3.=|]W'
else JJ,Fh .
insertSort(data, l, mid - l + 1); 0F`@/C1y55
if ((r - mid) > THRESHOLD) E@"+w,x)
mergeSort(data, temp, mid + 1, r); AZorzQ]s
else ?AyG!F
insertSort(data, mid + 1, r - mid); 'rHkJ
Iqe4O~)
for (i = l; i <= mid; i++) { %B3E9<9>U
temp = data; ;e()|
} 88d0`6K-9
for (j = 1; j <= r - mid; j++) { y ']>J+b0
temp[r - j + 1] = data[j + mid]; wlC_rRj~
} qDhz|a#
int a = temp[l]; 1;SW%\M
int b = temp[r]; *f.eyg#
for (i = l, j = r, k = l; k <= r; k++) { !y'LKze+G
if (a < b) { 0 '~Jr\4
data[k] = temp[i++]; Pp:(PoH
a = temp; ?;+=bKw0
} else { sL~TV([6/
data[k] = temp[j--]; Hm`9M.5b
b = temp[j]; oj$D3
} /`D]m?
} c>!>D7:7
} >t'/(y
]0xbvJ8oK
/** z>vzXM
* @param data Ws4aCH1
* @param l W )q^@6[d
* @param i c_O|?1
*/ QgEG%YqB
private void insertSort(int[] data, int start, int len) { bL!NT}y`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f'aUo|^?
} "2 ma]Ps
} R"!.|fH6
} :Py/d6KK
} L/<^uO1
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堆排序： iF{eGi
9/{+,RpC
package org.rut.util.algorithm.support; ai`fP{WlX
f<uLbJ6
import org.rut.util.algorithm.SortUtil; g!V;*[
2z:4\Y5
/** ~{*FjZ`h
* @author treeroot D^04b<O<x
* @since 2006-2-2 f 7y1V(t
* @version 1.0 ^;c!)0Q<Z
*/ k:Uyez
public class HeapSort implements SortUtil.Sort{ p44d&9
6fY(u7m|p
/* (non-Javadoc) hqFK2 lR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g*b%
*/ hBLJKSv
public void sort(int[] data) { EfcoJgX
MaxHeap h=new MaxHeap(); b3H~a2"d
h.init(data); b@Ik c<
for(int i=0;i h.remove(); 6t*pV [
System.arraycopy(h.queue,1,data,0,data.length); -/B}XNW
} E%3WJ%A
lK9us
private static class MaxHeap{ $[VKM|Zjw
><TuL7+
void init(int[] data){ c|:H/Y2n|
this.queue=new int[data.length+1]; MH?|>6
for(int i=0;i queue[++size]=data; PD$ay^Y
fixUp(size); V~&P<=8;Wl
} hh{4r} |
} G! zV=p
#v=hiL
private int size=0; ]"q)X{G(+
Q68&CO(rE
private int[] queue; W~POS'1
1V+a;-?
public int get() { v~?d7p{
return queue[1]; z\oq b)a
} tcwE.>5O
%^p1ax
public void remove() { &tj0Z:
SortUtil.swap(queue,1,size--); n9050&_S
fixDown(1); ?<#6=
} rfkk3oy
file://fixdown dum! AO
private void fixDown(int k) { 0 4x[@f`
int j; C^aP)& qt
while ((j = k << 1) <= size) { ^p|MkB?uM
if (j < size %26amp;%26amp; queue[j] j++; FdKp@&O+1
if (queue[k]>queue[j]) file://不用交换 @%O"P9;s
break; `]FA} wC
SortUtil.swap(queue,j,k); Vu*yEF}
k = j; &AU%3b
} `*&*jdq&i
} PnFU{N
private void fixUp(int k) { ,1Suq\ L
while (k > 1) { Ib*l{cxN
int j = k >> 1; s!9.o_k
if (queue[j]>queue[k]) 14]!LgH
break; w[uK3Av
SortUtil.swap(queue,j,k); YS{])+s
k = j; fk5!/>X
} R KFz6t
} % rRYT8
m_W\jz??k
} ;? '`XB!
%q;3bfq@N
} R."<he ;
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SortUtil： 5H6m{ng
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package org.rut.util.algorithm; drBWo|/
lV?rC z
import org.rut.util.algorithm.support.BubbleSort; W% YJ.%I
import org.rut.util.algorithm.support.HeapSort; zQ(li9
import org.rut.util.algorithm.support.ImprovedMergeSort; AZ(["kh[
import org.rut.util.algorithm.support.ImprovedQuickSort; |<\o%89AM
import org.rut.util.algorithm.support.InsertSort; 7Z0 )k9*
import org.rut.util.algorithm.support.MergeSort; ~Hd{+0
import org.rut.util.algorithm.support.QuickSort; Ih;6(5z
import org.rut.util.algorithm.support.SelectionSort; `ihlKFX
import org.rut.util.algorithm.support.ShellSort; `pn]jpW9
ua/A &XQx
/** 7ib~04
* @author treeroot _SY<(2s]B
* @since 2006-2-2 mv/'H^"[_
* @version 1.0 `4'v)!?
*/ rqxoqcZ
public class SortUtil { mEa\0oPGB
public final static int INSERT = 1; k_r12Bu
public final static int BUBBLE = 2; pD9*WKEf*
public final static int SELECTION = 3; KqP!={>"
public final static int SHELL = 4; SuB;Nb7r`
public final static int QUICK = 5; c_~)#F%P
public final static int IMPROVED_QUICK = 6; [uT&sZxmg
public final static int MERGE = 7; Sqed*
public final static int IMPROVED_MERGE = 8; Lp5LRw
public final static int HEAP = 9; >to NGGU=~
[<}:b>a
public static void sort(int[] data) { x>A(016:C
sort(data, IMPROVED_QUICK); /1zi(z
} .5p"o-:D
private static String[] name={ MH.,dB&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2oXsPrtZ
}; i;s&;_0{
`J|bGf#
private static Sort[] impl=new Sort[]{ |#D3~au
new InsertSort(), Dkayk
new BubbleSort(), EA7 8&
new SelectionSort(), 7"yA~e,l
new ShellSort(), skh6L!6*<
new QuickSort(), b/:9^&z
new ImprovedQuickSort(), :;cKns0OA
new MergeSort(), = 7d{lK
new ImprovedMergeSort(), "a6[FqTs
new HeapSort() \sEq r)\k
}; SQDllG84E
jutEb@nog
public static String toString(int algorithm){ c/DB"_}!a
return name[algorithm-1]; 0.'$U}#b
} z2vrV?:
OIGu`%~js
public static void sort(int[] data, int algorithm) { -GLI$_lLF
impl[algorithm-1].sort(data); n2zJ'
} 26B]b{Iz{
v#q7hw=
public static interface Sort { -Ob'/d5&
public void sort(int[] data); i^eU!^KF
} z|^:1ov,
3,DUT{2
public static void swap(int[] data, int i, int j) { :aI[ lZ
int temp = data; w!,~#hbt6
data = data[j]; }b)7gd=
data[j] = temp; &m&Z^CA
} `wj<d>m
} KC9_H>