[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; LXu"rfp
} %v+fN?%x,d
int i1=l; u"8;fS
int i2=mid+1; ~eV!!38 J
for(int cur=l;cur<=r;cur++){ CNRU"I+jU
if(i1==mid+1) xAd>",=~
data[cur]=temp[i2++]; s3_e7D ^H
else if(i2>r) Vkvb=
data[cur]=temp[i1++]; :Nj`_2
else if(temp[i1] data[cur]=temp[i1++]; h;ol"
else *v nxP9<
data[cur]=temp[i2++]; Rp`_Grcd
} +`s&i%{1>
} h6T/0YhWLP
,[}yf#8@J
} c<h!QnJ
Gz[ymj)5
改进后的归并排序: e=n{f*KG`
F`BgKH!
package org.rut.util.algorithm.support; )Rhff$
\abAPo
import org.rut.util.algorithm.SortUtil; o&XMgY~
w^'?4M!
/** _[{:!?-?
* @author treeroot ,7fc41O3V
* @since 2006-2-2 '=Kof1
* @version 1.0 C/CfjRzd
*/ #?$'nya*u
public class ImprovedMergeSort implements SortUtil.Sort { X#kjt)W
I~]Q55
private static final int THRESHOLD = 10; u_6BHsU
IzGB
/* R<lNk<
* (non-Javadoc) ]zvVY:v
* Id.Z[owC`Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |:e|~sism
*/ ^0s\/qyqm
public void sort(int[] data) { J%\~<_2ny
int[] temp=new int[data.length]; x'@32gv
mergeSort(data,temp,0,data.length-1); Y0X"Zw
} >: W-C{%
Vh#Mp!
private void mergeSort(int[] data, int[] temp, int l, int r) { JwI`"$>w
int i, j, k; ;la#Vf:]
int mid = (l + r) / 2; s7.p$r
if (l == r) L'\/)!cEd
return; 8R)D! 7[l
if ((mid - l) >= THRESHOLD) 3m43nJ.~
mergeSort(data, temp, l, mid); ,h@R' f!
else mP)3cc5T
insertSort(data, l, mid - l + 1); {KU.
if ((r - mid) > THRESHOLD) r{q}f)
mergeSort(data, temp, mid + 1, r); Q9yGQu
else =~\]3g
insertSort(data, mid + 1, r - mid); Xb<DpBrk
I NPYJ#%
for (i = l; i <= mid; i++) { ^)hAVf~E
temp = data; 4j=<p@
} V{T{0b"\U
for (j = 1; j <= r - mid; j++) { h"PS-]:CD
temp[r - j + 1] = data[j + mid]; S7UZGGjTk
} ib(>vp$V
int a = temp[l]; SvX=isu!.
int b = temp[r]; UBhciZ
for (i = l, j = r, k = l; k <= r; k++) { Y3P.|
if (a < b) { ];pf
data[k] = temp[i++]; Gq0]m
a = temp; @@%i(>4Z
} else { jNe(w<',P
data[k] = temp[j--]; (@KoqwVWc
b = temp[j]; |%'6f}fnE
} "+n4c'
} _}I(U?Q-C
} H:q)^$s
a@fE46o6<
/** z29qARiX
* @param data pK6e/eC
* @param l mfeMmKFu\
* @param i IP30y>\
*/ S]e j=6SP
private void insertSort(int[] data, int start, int len) { d)04;[=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fjIcB+Z
} _e?q4>B)c
} ]DC;+;8Jc
} \);.0
} VX^o"9Ntl
4pmTicA~
堆排序： jFuC=6aF
AezvBY0'`z
package org.rut.util.algorithm.support; ~|CJsD/
F-BJe]
import org.rut.util.algorithm.SortUtil; N+CXOI=6x
NI5]Nz<?
/** >H0) ph
* @author treeroot }O,U2=Hw`]
* @since 2006-2-2 xl+DRPzl
* @version 1.0 zH)cU%I@.
*/ 2PVx++*]C
public class HeapSort implements SortUtil.Sort{ XYqpI/s
XJx,9trH
/* (non-Javadoc) $nB-ADRu@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !;o\5x<'$O
*/ ]ZzoJ7lr
public void sort(int[] data) { uQGz;F x
MaxHeap h=new MaxHeap(); AVXX\n\_
h.init(data); `y\*m]:
for(int i=0;i h.remove(); ds*m6#1b
System.arraycopy(h.queue,1,data,0,data.length); _\ .
} <u/a`E?
_4P;+Y
private static class MaxHeap{ Q7,EY /
xn(+G$m
void init(int[] data){ b!i`o%Vb
this.queue=new int[data.length+1]; e#>tM
for(int i=0;i queue[++size]=data; T*h!d(
fixUp(size); D4< -8
} ss?]
} m"lE&AM64p
UF@IBb}0
private int size=0; #*!+b
(Ij0AeJ#
private int[] queue; F,*2#:Ki
28nmQ
public int get() { Ya}T2VX
return queue[1]; 3g4e']t
} `1nRcY
9<xTu>7J
public void remove() { BG'6;64kx6
SortUtil.swap(queue,1,size--); Tr}R`6d$
fixDown(1); MKU7fFN.
} u-m%=2
file://fixdown Q`H# fS~
private void fixDown(int k) { '5'3_vM
int j; No:^hY:F8
while ((j = k << 1) <= size) { >|wKXz
if (j < size %26amp;%26amp; queue[j] j++; - #3{{
if (queue[k]>queue[j]) file://不用交换 y L*LJ
break; \r)%R5_CQ
SortUtil.swap(queue,j,k); {IJ-4>
k = j; C&=x3Cz
} BjM+0[HC
} }o-|8P:Y
private void fixUp(int k) { `vudS?
while (k > 1) { +'-rTi\
int j = k >> 1; bfFmTI$,
if (queue[j]>queue[k]) 31WZJm^
break; $Axng J c
SortUtil.swap(queue,j,k); <5dH *K
k = j; KwS`3 6:
} zQ,f5x
} 2=>*O
e#tIk;9Xz
} nz^nptw
XJe/tR
} X]qCS0GD'
Z;hyi'rPJ
SortUtil： Ig<}dM.Z[
'<TD6jBs
package org.rut.util.algorithm; 9oEpPL5
|Eb&}m:E$
import org.rut.util.algorithm.support.BubbleSort; xJ-*%'(KZ
import org.rut.util.algorithm.support.HeapSort; UmJUt|
import org.rut.util.algorithm.support.ImprovedMergeSort; Zp`~}LV{
import org.rut.util.algorithm.support.ImprovedQuickSort; My. dD'C
import org.rut.util.algorithm.support.InsertSort; ASR-a't6
import org.rut.util.algorithm.support.MergeSort; wTTRoeJ}
import org.rut.util.algorithm.support.QuickSort; 9hy'DcSy,
import org.rut.util.algorithm.support.SelectionSort; XM$GQn]B
import org.rut.util.algorithm.support.ShellSort; ;v_ls)_,-
*/nuv k
/** dgXg kB'
* @author treeroot ]GNh)
* @since 2006-2-2 I-,>DLG
* @version 1.0 @d&g/ccMxd
*/ 'GkvUrD9D$
public class SortUtil { Yt{ji
public final static int INSERT = 1; T)8p:}P!
public final static int BUBBLE = 2; @: Z#E[N H
public final static int SELECTION = 3; {(;B5rs
public final static int SHELL = 4; a2o.a2
public final static int QUICK = 5; >rKhlUD
public final static int IMPROVED_QUICK = 6; zhX;6= X2
public final static int MERGE = 7; 7{-@}j`
public final static int IMPROVED_MERGE = 8; W,Ty=:qm*
public final static int HEAP = 9; %VWp&a8
gt/!~f0r
public static void sort(int[] data) { )!A 2>
sort(data, IMPROVED_QUICK); NEMEY7De2
} \7yJ\I
private static String[] name={ #pX8{Tf[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v;Es^ YI
}; WHP;Neb6
RK-x?ZYH'
private static Sort[] impl=new Sort[]{ p'}lN|"{O
new InsertSort(), u#FXW_-TK
new BubbleSort(), VgA48qZ
new SelectionSort(), 0(8gQ 2n
new ShellSort(), DcN"=Y
new QuickSort(), 'j}g
new ImprovedQuickSort(), ehE-SrkU'
new MergeSort(), >60"p~t
new ImprovedMergeSort(), ;}D-:J-z_
new HeapSort() y:.?5KsPI
}; !N1J@LT5h
SiV*WxQe
public static String toString(int algorithm){ VG)="g[%)
return name[algorithm-1]; uJY.5w
} S6GMUaR
Wab.|\c
public static void sort(int[] data, int algorithm) { 8b7;\C~$p
impl[algorithm-1].sort(data); eQ<xp A
} OF8WDo`
12lEs3
public static interface Sort { 4:U0f;Fs
public void sort(int[] data); dKm`14f]@G
} Jn*Nao_)
9:-T@u
public static void swap(int[] data, int i, int j) { 0R|K0XH#$
int temp = data; Z(HZB
data = data[j]; kon5+g9q
data[j] = temp; xQo~%wW,?
} _IxamWpX$
} tq&Yek>C