[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; Vsj1!}X:
} W?:e4:Q
int i1=l; /&i6vWMhP
int i2=mid+1; R/WbcQ)
for(int cur=l;cur<=r;cur++){ Bs3M7zRG
if(i1==mid+1) j&N {j_M
data[cur]=temp[i2++]; QomihQnc
else if(i2>r) : MEB] }
data[cur]=temp[i1++]; /ucS*m:<x
else if(temp[i1] data[cur]=temp[i1++]; #FhgKwx
else mx!EuF$I
data[cur]=temp[i2++]; Dq~\U&U\$
} @*<`*W
} 'PqKb%B|
M*-]<!))7
} +:_;K_h
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改进后的归并排序: 0'ge}2^
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package org.rut.util.algorithm.support; 2CF5qn}T
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import org.rut.util.algorithm.SortUtil; (&KBYiwr
u9*7Buou^
/** dFl8'D
* @author treeroot uqsVq0H
* @since 2006-2-2 b[2 #t
* @version 1.0 R*`=Bk0+
*/ W9G1wU
public class ImprovedMergeSort implements SortUtil.Sort { jX;$g>P
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private static final int THRESHOLD = 10; 96d&vm~m1
1wg#4h43l
/* s/0bXM$^
* (non-Javadoc) xFzaVjjP
* ,@]*Xgt=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rU |%
*/ 3^,p$D<T:,
public void sort(int[] data) { "!9FJ Y
int[] temp=new int[data.length]; U1)!X@F{
mergeSort(data,temp,0,data.length-1); 0O!A8FA0
} |4j'KM;U
ANRZQpnXQ
private void mergeSort(int[] data, int[] temp, int l, int r) { 6W/uoH=;
int i, j, k; ;w<r/dK
int mid = (l + r) / 2; HoO1_{q"
if (l == r) *AG01# ZF
return; J(Fk@{!F.*
if ((mid - l) >= THRESHOLD) FvXpqlp
mergeSort(data, temp, l, mid); n#S?fsQN
else :I2spBx
insertSort(data, l, mid - l + 1); )E*-
if ((r - mid) > THRESHOLD) Kw =RqF
mergeSort(data, temp, mid + 1, r); 98Y1-Z^ .
else RDOV+2K
insertSort(data, mid + 1, r - mid); ~hb;kc3
LYke\/ md
for (i = l; i <= mid; i++) { +62}//_?
temp = data; (,R\6
} 0O?\0k;o
for (j = 1; j <= r - mid; j++) { 7po;*?Ox
temp[r - j + 1] = data[j + mid]; N *,[(q
} bHg 0,N
int a = temp[l]; %F87"v~
int b = temp[r]; xQ! Va
for (i = l, j = r, k = l; k <= r; k++) { IqFmJs|C
if (a < b) { i 2 ='>
data[k] = temp[i++]; k{ $,FQ4
a = temp; 6~O;t'd
} else { f{-,"6Y1
data[k] = temp[j--]; u/apnAW@M
b = temp[j]; ZmvtUma
} a/n~#5-
} (\%J0kR3[
} ~g}blv0q+B
(@NW2
/** c1xX)cF
* @param data }Xb|Ur43
* @param l l% p4.CX
* @param i +bk+0k9k5
*/ xD9ZL
private void insertSort(int[] data, int start, int len) { 7[1VFc#tf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QN;GMX5&
} r_MP[]f|0
} +4F; m_G6
} &MBm1T|Y
} bsc#Oq]
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堆排序： \j4!dOGZ
k)zBw(wr
package org.rut.util.algorithm.support; TVVu_ib
D7Y?$=0ycb
import org.rut.util.algorithm.SortUtil; 69 J4p=c,
c_u7O \
/** =N2@H5+7
* @author treeroot 1U(!%},
* @since 2006-2-2 cR/e Zfl
* @version 1.0 _6->D[dB
*/ ]}pAZd
public class HeapSort implements SortUtil.Sort{ *, R ~[g
]YY4{E(9d
/* (non-Javadoc) uT YG/O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AD>/#Ul
*/ 9hgIQl
public void sort(int[] data) { 1[-RIN;U8
MaxHeap h=new MaxHeap(); f[q_eY
h.init(data); gX(8V*os^
for(int i=0;i h.remove(); nv3TxG
System.arraycopy(h.queue,1,data,0,data.length); ?4t~z 1.f
} Ch]q:o4
<bJ~Ol
private static class MaxHeap{ F.D6O[pZ
}OSfC~5P
void init(int[] data){ ppu<k N
this.queue=new int[data.length+1]; [OFT!=.y &
for(int i=0;i queue[++size]=data; OqX+R4S
fixUp(size); g`,(O
} _zLEHEZ-
} .UU)
9y*(SDF
private int size=0; _I%mY!x\`
#2+hu^Q-
private int[] queue; Xy9'JVV6
7'5/T]Z
public int get() { U+uIuhz
return queue[1]; .:/X~{
} ~]BR(n
:I^4ILQCD
public void remove() { M#yUdl7d
SortUtil.swap(queue,1,size--); <#~n+,
fixDown(1); R%JEx3)0m
} Lve$H(GHT
file://fixdown =|d5V%mK
private void fixDown(int k) { p+2uK|T9
int j; Y'y$k
while ((j = k << 1) <= size) { &#@"^(} 6
if (j < size %26amp;%26amp; queue[j] j++; Y3xEFqMU
if (queue[k]>queue[j]) file://不用交换 8g/r8u~
break; R!WeSgKCs
SortUtil.swap(queue,j,k); cSj(u%9}
k = j; k,y#|bf,Y
} ">s0B5F7
} kEg~yN
private void fixUp(int k) { !zxq9IhWR
while (k > 1) { R~bLEo
int j = k >> 1; eh*F/Gu
if (queue[j]>queue[k]) ^fM=|.?
break; :$QwOz^N*
SortUtil.swap(queue,j,k); ;8gODj:dO
k = j; QYWl`Yqf
} !Tu.A@
} l`];CALA4
5JZZvc$au
} [ HjGdC
=IIE]<z
} ,=P0rbtK
t;[Q&Jl
SortUtil： +>v{#A_u
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package org.rut.util.algorithm; U7G|4(
Vb2")+*:
import org.rut.util.algorithm.support.BubbleSort; *c@]c~hY,
import org.rut.util.algorithm.support.HeapSort; &J=x[{R
import org.rut.util.algorithm.support.ImprovedMergeSort; S*rcXG6Q^
import org.rut.util.algorithm.support.ImprovedQuickSort; t*Wxvoxk
import org.rut.util.algorithm.support.InsertSort; gOk^("@
import org.rut.util.algorithm.support.MergeSort; n6*; ~h5
import org.rut.util.algorithm.support.QuickSort; q5w)i
import org.rut.util.algorithm.support.SelectionSort; /h@rLJ)o>
import org.rut.util.algorithm.support.ShellSort; @HXXhYH
%;G!gJeE
/** yNQ 9~P2
* @author treeroot N?Ss/by8Sg
* @since 2006-2-2 {K2F(kz?T
* @version 1.0 "2@Ys*e
*/ \y/+H
public class SortUtil { JDC,]
public final static int INSERT = 1; 5TdI
public final static int BUBBLE = 2; wT\dzp>/
public final static int SELECTION = 3; F^');8~L
public final static int SHELL = 4; @yjui
public final static int QUICK = 5; ;Y16I#?;Kh
public final static int IMPROVED_QUICK = 6; II_MY#0X
public final static int MERGE = 7; Ia)^
public final static int IMPROVED_MERGE = 8; *$>$O%
public final static int HEAP = 9; k?=V?JWY
Iyvl6
public static void sort(int[] data) { SHPZXJ{
sort(data, IMPROVED_QUICK); ?r~](l
} ]9pcDZB
private static String[] name={ k4nA+k<WI`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #kGxX@0
}; 8%9OB5?F6
|zL.PS
private static Sort[] impl=new Sort[]{ Xq%!(YD|
new InsertSort(), 5(OF~mX#
new BubbleSort(), ~ .Eln+N
new SelectionSort(), |m7`:~ow
new ShellSort(), :hxZ2O?5_
new QuickSort(), ,K[B/tD{j
new ImprovedQuickSort(), }~5xlg$B<<
new MergeSort(), K#{E87G(
new ImprovedMergeSort(), %x7l`.)N
new HeapSort() 8JAT2a61ur
}; l@YpgyqaL
#$%gs]
public static String toString(int algorithm){ 9/|i.2&
return name[algorithm-1]; #Ryu`b
} JXnPKAN
c5rQkDW
public static void sort(int[] data, int algorithm) { IA;KEGJ
impl[algorithm-1].sort(data); mwTn}h3N
} ]QU52R@M
Onoi6^G
public static interface Sort { ^q$vyY
public void sort(int[] data); K+mtuB]yr
} V1;Qt-i
,K6]Q|U@r
public static void swap(int[] data, int i, int j) { {1YT a:evl
int temp = data; 0?t!tugG
data = data[j]; @w:sNXz-
data[j] = temp; ;h3*MR
} &f qmO>M
} :<IW'