[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; g66=3c9</6
} x^Tjs<#
int i1=l; [?x9NQ{
int i2=mid+1; ?#!Hm`\.
for(int cur=l;cur<=r;cur++){ kKVd4B[#*
if(i1==mid+1) %[\: 8
data[cur]=temp[i2++]; n"vl%!B
else if(i2>r) a]'sby
data[cur]=temp[i1++]; F+,X%$A#?
else if(temp[i1] data[cur]=temp[i1++]; JW9^C
else 0Ge*\Q
data[cur]=temp[i2++]; 8*kZ.-T B
} Y,RED5]t
} v39`ct=e
*#1&IJPI
} >Z?fX
0l3v>ty
改进后的归并排序: 9;2PoW8
s^ rO I~
package org.rut.util.algorithm.support; '$pT:4EuGq
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import org.rut.util.algorithm.SortUtil; "<ow;ciJF
In^MZ)?
/** "}Kvx{L8
* @author treeroot 2K<rK(
* @since 2006-2-2 i)f3\?,,
* @version 1.0 ]'V8{l
*/ #P*%FgROl
public class ImprovedMergeSort implements SortUtil.Sort { dQ?4@
Mm`jk%:%]
private static final int THRESHOLD = 10; C\Q3vG
VTk6.5!8
/* <J-bDcp
* (non-Javadoc) 6TJ5G8z_
* ;Q&38qI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <GPL8D
*/ _Z+tb]
public void sort(int[] data) { pw{3I 2Ix
int[] temp=new int[data.length]; _F>1b16:/P
mergeSort(data,temp,0,data.length-1); /Y5I0Ko Uw
} ,{:c<W:A]
HmKvu"3
private void mergeSort(int[] data, int[] temp, int l, int r) { wVkms
int i, j, k; IK5FSN]s/
int mid = (l + r) / 2; L,!?'.*/]
if (l == r) #m?GBr%k
return; "6_#APoP
if ((mid - l) >= THRESHOLD) fgg^B[(Y
mergeSort(data, temp, l, mid); `M/=_O3
else yLCqlK
insertSort(data, l, mid - l + 1); KK4>8zGR
if ((r - mid) > THRESHOLD) *6 -;iT8
mergeSort(data, temp, mid + 1, r); 6la# 0U23
else ?xh_qy;
insertSort(data, mid + 1, r - mid); ,6Sa
J XKps#,(#
for (i = l; i <= mid; i++) { _?>!Bz m
temp = data; 4NN-'Z>a
} ms'&.u&<
for (j = 1; j <= r - mid; j++) { =o\:@I[
temp[r - j + 1] = data[j + mid]; u{0+w\xH\
} v'i"Q
int a = temp[l]; LqIMU4Ex
int b = temp[r]; J0zudbP
for (i = l, j = r, k = l; k <= r; k++) { o_&.R
if (a < b) { |t CD@M
data[k] = temp[i++]; MV6%~T
a = temp; Ag}V>i'
} else { qd{o64;|
data[k] = temp[j--]; pcXY6[#N
b = temp[j]; HX\@Qws
} ;wND?:
} 3U<\y6/
} 0h!2--Aur
BF8n: }9U
/** @_^QBw0
* @param data `%;nHQ"
* @param l :,rD5aOQ
* @param i 4 q}1
*/ 1<A+.W
private void insertSort(int[] data, int start, int len) { k$:QpTg[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f^](D'L?D
} WS9n.opl}
} [W=%L:Ea
} IcZ_AIjlk
} ^% BD
S`2MQL
堆排序： .vNfbYH(
vW]Frb
package org.rut.util.algorithm.support; 1Uz'=a
!OWVOq8
import org.rut.util.algorithm.SortUtil; ,e+.Q#r*Y
'KpCPOhfR
/** D *W+0
* @author treeroot dvxD{UH
* @since 2006-2-2 Z)'jn8?P
* @version 1.0 +A8S 6bA[=
*/ Le9r7O:
public class HeapSort implements SortUtil.Sort{ 1~8F&
z
/* (non-Javadoc) 6yk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5Zs"CDU
*/ 8B;`9?CI
public void sort(int[] data) { 7p3 ;b"'
MaxHeap h=new MaxHeap(); g3n^ <[E
h.init(data); {l{p
for(int i=0;i h.remove(); ?I}jsm1)
System.arraycopy(h.queue,1,data,0,data.length); +P|$T:b
} 7c!oFwM
~6U@*Svk
private static class MaxHeap{ _tL+39 u
acB,u&
void init(int[] data){ *{W5QEa
this.queue=new int[data.length+1]; I'"*#QOX
for(int i=0;i queue[++size]=data; ar+mj=m
fixUp(size); 9bgKu6-X
} FMY r6/I
} oV?tp4&
~cSC-|$^&
private int size=0; .6!]RA5!=
J&^r}6D
private int[] queue; 1w+OnJI?
JeMhiY}
public int get() { ,iCd6M{
return queue[1]; o"[P++qd
} nhk +9
NrVQK}%K
public void remove() { dDW],d}B;
SortUtil.swap(queue,1,size--); RUf,)]Vvk
fixDown(1); /7@@CG6b
} }^G'oR1LF
file://fixdown C JiMg'K
private void fixDown(int k) { @SPmb o
int j; <<(~'$~,L
while ((j = k << 1) <= size) { ':[+UUC@
if (j < size %26amp;%26amp; queue[j] j++; [=e61Z
if (queue[k]>queue[j]) file://不用交换 [#j|TBMHM
break; ig; ~ T
SortUtil.swap(queue,j,k); IK{0Y#c
k = j; /.'1i4Xa1P
} \yb^%$hZ0
} +x G](?
private void fixUp(int k) { Ec_ G9&
while (k > 1) { Y8.0R-:ZAN
int j = k >> 1; j='Ne5X1
if (queue[j]>queue[k]) _+|*
break; fouy??
SortUtil.swap(queue,j,k); '7>Vmr6
k = j; QC4_\V>[
} tt|U,o
} AEPgQ9#E
|Y(].G,
} 4TG|
dyWWgC%A
} ksDG8^9>]
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SortUtil： W$gSpZ_7
K/Q;]+D
package org.rut.util.algorithm; FD|R4 V*3
GD[~4G
import org.rut.util.algorithm.support.BubbleSort; :KX/`
import org.rut.util.algorithm.support.HeapSort; XIBw&mWf
import org.rut.util.algorithm.support.ImprovedMergeSort; ]*i>KR@G
import org.rut.util.algorithm.support.ImprovedQuickSort; VmBLNM?
import org.rut.util.algorithm.support.InsertSort; g?j"d{.9t
import org.rut.util.algorithm.support.MergeSort; qFUpvTe
import org.rut.util.algorithm.support.QuickSort; ZI}m~7
import org.rut.util.algorithm.support.SelectionSort; $ }B"u;:SU
import org.rut.util.algorithm.support.ShellSort; H/)=
A ,LAA$
/** C+5^[V
* @author treeroot dUb(C1h
* @since 2006-2-2 L8bq3Q'p
* @version 1.0 "%f>/k;!h.
*/ OFRzzG@
public class SortUtil { k%In
public final static int INSERT = 1; JB%6G|Z
public final static int BUBBLE = 2; MM'<uy
public final static int SELECTION = 3; IZAbW
public final static int SHELL = 4; GmAE!+"
public final static int QUICK = 5; apY m,_
public final static int IMPROVED_QUICK = 6; u8o7J(aQsR
public final static int MERGE = 7; 9\Xl3j!
public final static int IMPROVED_MERGE = 8; 0QC*Z (
public final static int HEAP = 9; b17p;wS
G>:l(PW:
public static void sort(int[] data) { #Q'i/|g
sort(data, IMPROVED_QUICK); B]*&lRR
} gmLw.|-
private static String[] name={ <V6#)^Or
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JH)&Ca>S
}; r4D66tF
_R5^4-Qe
private static Sort[] impl=new Sort[]{ ;F5B)&/B
new InsertSort(), cK-!Evv
new BubbleSort(), zLxWyPM0;
new SelectionSort(), ?erDP8
new ShellSort(), 2lp.Td`{
new QuickSort(), HNh=igu
new ImprovedQuickSort(), ;quGy3
new MergeSort(), 3ZZJYf=
new ImprovedMergeSort(), snEkei|0
new HeapSort() D^&!
}; `J-"S<c?_
' >\*
public static String toString(int algorithm){ B;K{Vo:C
return name[algorithm-1]; V9<[v?.\
} 7#g C(&\A
aD&10b9`
public static void sort(int[] data, int algorithm) { jzPC9
impl[algorithm-1].sort(data); CJu;X[6
} fA3
yS3x))
public static interface Sort { Sl$dXB@
public void sort(int[] data); pp{);
} U-lN_?
uq 6T|Zm
public static void swap(int[] data, int i, int j) { -y/?w*Cx
int temp = data; [j!0R'T
data = data[j]; fptW#_V2
data[j] = temp; iww h,(
} S[u<vHy
} cnIy*!cJs