[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; *>H M$.?Q
} r]8wOu-'
int i1=l; Q%M'[L?[
int i2=mid+1; o0zc}mm
for(int cur=l;cur<=r;cur++){ 08<k'Oi]
if(i1==mid+1) 1x~%Ydy
data[cur]=temp[i2++]; $sA,$x:^xI
else if(i2>r) KzEuPJ?
data[cur]=temp[i1++]; >2l13^Y
else if(temp[i1] data[cur]=temp[i1++]; hgTM5*fD}
else -@EBbM&
data[cur]=temp[i2++]; g*:ae;GP
} (|yRo
} 4+ASwN9
oUW)H
} nz,Mqol
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改进后的归并排序: -X"5G
Z!C`f/h9
package org.rut.util.algorithm.support; $nUd\B$.=
6{JR0
import org.rut.util.algorithm.SortUtil; "#mXsp-ut
*u|lmALs
/** DFt=%aV[
* @author treeroot _hAj2%SL
* @since 2006-2-2 =]_d pEEQ
* @version 1.0 viW~'}^k7
*/ mF6@Y[/B
public class ImprovedMergeSort implements SortUtil.Sort { *G%1_
!ol hZ
private static final int THRESHOLD = 10; e5*5.AB6&
9f\aoVX
/* (cOND/S
* (non-Javadoc) `c qH}2s#
* `^ieT#(O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yj}bY?4I
*/ 8ktjDs$=.:
public void sort(int[] data) { A}>|tm7|
int[] temp=new int[data.length]; nUI63?
mergeSort(data,temp,0,data.length-1); t*Z .e.q+
} )bB"12Z|8
O:oU`vE
private void mergeSort(int[] data, int[] temp, int l, int r) { .u&&H_ UmE
int i, j, k; KKeb ioW
int mid = (l + r) / 2; SY!`a:It
if (l == r) !SLP8|Cd
return; C:'WX*W
if ((mid - l) >= THRESHOLD) >< <$
mergeSort(data, temp, l, mid); <GL}1W"Ay
else ql#{=oGDnA
insertSort(data, l, mid - l + 1); >,w\lf9
if ((r - mid) > THRESHOLD) rh:s 7
mergeSort(data, temp, mid + 1, r); TTA{#[=7
else d&PE,$XC
insertSort(data, mid + 1, r - mid); VYl_U?D
bqw/O`*wfN
for (i = l; i <= mid; i++) { /t$+Af,}
temp = data; D\45l
} ifJv~asp
for (j = 1; j <= r - mid; j++) { J)7,&Gc6
temp[r - j + 1] = data[j + mid]; p=8M0k
} I2t-D1X
int a = temp[l]; p\\P50(-
int b = temp[r]; Xm"w,J&
for (i = l, j = r, k = l; k <= r; k++) { ;#5-.z
if (a < b) { 7AGZu?1]M
data[k] = temp[i++]; L:t)$iF5+
a = temp; %KJ"rvi4K
} else { PTuCN
data[k] = temp[j--]; N3XVT{yo
b = temp[j]; S7?f5ux
} O+(. 29
} fd!pM4"0
} ++J Bbuzj!
.XV]<)<K$
/** dK0}% ]i3#
* @param data |g7nh[
* @param l +BtLyQ
* @param i yBYuDfeZ
*/ )o " SB1
private void insertSort(int[] data, int start, int len) { 5p]urfN-f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WryW3];0OR
} )*^OPVt
} >j(I[_g
} gZ`#tlA~
} iGEQXIr3
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堆排序： )RAv[U1
:|3"H&FWK
package org.rut.util.algorithm.support; C1#o<pv
t?%}hs\!
import org.rut.util.algorithm.SortUtil; ;3.T* ?|o
>+A1 V[
/** J[& 7,}
* @author treeroot N8DiEB3~
* @since 2006-2-2 {Gk}3u/
* @version 1.0 uNPD~TYN
*/ E5Snl#Gl\0
public class HeapSort implements SortUtil.Sort{ n3HCd-z
*hk{q/*Qw
/* (non-Javadoc) k2_6<v Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MQ9M%>
*/ ,z0~mN
public void sort(int[] data) { ~L\(/[
MaxHeap h=new MaxHeap(); Pq{YZMr
h.init(data); H649J)v+m
for(int i=0;i h.remove(); evndw>
System.arraycopy(h.queue,1,data,0,data.length); t(z(-G|&
} cjy0s+>>
n7`.<*:
private static class MaxHeap{ Sq?6R}q%
>n$EeJ
void init(int[] data){ IxEQh)J X
this.queue=new int[data.length+1]; k"DQbUy0L
for(int i=0;i queue[++size]=data; $X.'W\o|
fixUp(size); #RLch
} )'K!)?&d
} d 40'3]/{
BZ\EqB
private int size=0; |$.sB|_ N
ZaNyNxbp>z
private int[] queue; 5Re`D|8
R uFu,H-
public int get() { v:J.d5
return queue[1]; eBYaq!t k
} ^)C$8:@
9sO{1rF
public void remove() { ;K)?:
SortUtil.swap(queue,1,size--); I).^,%>Z)
fixDown(1); wEo-a< (
} ]mO+<{{4X
file://fixdown 6&OonYsP
private void fixDown(int k) { uc"[qT(X
int j; H z< M
while ((j = k << 1) <= size) { Skk3M?
if (j < size %26amp;%26amp; queue[j] j++; VvMU)
if (queue[k]>queue[j]) file://不用交换 Tl/Dq(8JH
break; bb O;AiHD
SortUtil.swap(queue,j,k); soQv?4
k = j; !Lg}q!*%>V
} qG2\`+v
} E3.W#=o
private void fixUp(int k) { e~2*>5\:
while (k > 1) { V)?x*R*T)
int j = k >> 1; #:ED 0</
if (queue[j]>queue[k]) m|Q&Lphb8
break; M*T# 5
SortUtil.swap(queue,j,k); qI V`zZc
k = j; 2)I'5?I
} G.q^Zd#.T
} v;F+fOo
p-(ADQS
} 9^Vx*KVrU
d@>k\6%j
} a,0o{*(u$
?w5nKpG#RI
SortUtil： )Ido|!]0d
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package org.rut.util.algorithm; z7l;|T
@=zBF'<.9
import org.rut.util.algorithm.support.BubbleSort; }~\].I6
import org.rut.util.algorithm.support.HeapSort; 82@;.%
import org.rut.util.algorithm.support.ImprovedMergeSort; 1Sc~Vb|>
import org.rut.util.algorithm.support.ImprovedQuickSort; `bt)'ERO%#
import org.rut.util.algorithm.support.InsertSort; .+JPtL
import org.rut.util.algorithm.support.MergeSort; e,j?_p
import org.rut.util.algorithm.support.QuickSort; L&gEQDPgq|
import org.rut.util.algorithm.support.SelectionSort; k~9Ywf
import org.rut.util.algorithm.support.ShellSort; $qyM X[
KAZkVL
/** 7i|hlk;
* @author treeroot o}^vREO
* @since 2006-2-2 I3E8vi%B.
* @version 1.0 C5lD Hw[CX
*/ ^J5V!i$
public class SortUtil { ~3-YxCn%
public final static int INSERT = 1; nu<!2xs,
public final static int BUBBLE = 2; EV7+u0uN&Q
public final static int SELECTION = 3; ,IVr4#w0=
public final static int SHELL = 4; +KwF U
public final static int QUICK = 5; e[k;SSs
public final static int IMPROVED_QUICK = 6; oWaIjU0
public final static int MERGE = 7; HS&uQc a
public final static int IMPROVED_MERGE = 8; uF.\dY\xv
public final static int HEAP = 9; r0$9c
JU%yqXO
public static void sort(int[] data) { v,.n/@s|X
sort(data, IMPROVED_QUICK); 1.d9{LO[-
} MPEBinE?
private static String[] name={ 7Hkf7\JY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xi`U`7?D(=
}; [@FeRIu8
^CZ|ci6bX
private static Sort[] impl=new Sort[]{ #y9K-}u
new InsertSort(), ^[\53\R~
new BubbleSort(), Ew,wNR`
new SelectionSort(), *1$~CC7
new ShellSort(), .LTFa.jxA
new QuickSort(), hpi_0lMkI
new ImprovedQuickSort(), <n~g+ps
new MergeSort(), !VZCM{
new ImprovedMergeSort(), K'rs9v"K|
new HeapSort() Nm:<rI,^
}; N,+g/o\f
#1!BD!u
public static String toString(int algorithm){ ^fiRRFr[
return name[algorithm-1]; @U.}Ei
} <.%8j\j(
kd4*Zab
public static void sort(int[] data, int algorithm) { {|wTZ
impl[algorithm-1].sort(data); ps;o[gB@5
} Eq.zCD8A
wm`"yNbD
public static interface Sort { K[;,/:Y
public void sort(int[] data); U[ O!&:6
} ^EBM;&;7
3UtXxL&L`
public static void swap(int[] data, int i, int j) { Mw7UU1 ei
int temp = data; Q+js2?7^
data = data[j]; cZ2, u,4
data[j] = temp; iwTBE]J
} BL^Hj
} PaI63 !