[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; Gcu[G]D
} rf}@16O$'
int i1=l; WDrC
int i2=mid+1; QkY]z~P4
for(int cur=l;cur<=r;cur++){ :9nqQJ+~
if(i1==mid+1) i-kj6N5
data[cur]=temp[i2++]; ^a,Oi%
else if(i2>r) 3mmp5 d
data[cur]=temp[i1++]; ZeB"k)FI>
else if(temp[i1] data[cur]=temp[i1++]; WD`z\{hcom
else VR5CRNBJ
data[cur]=temp[i2++]; B4uJT~,7>
} NFYo@kX> G
} 0-s[S
_BC%98:WP
} 6R`q{}.
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改进后的归并排序: 7IEG%FY T
[.ya&E)x
package org.rut.util.algorithm.support; #Qir%\*V
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import org.rut.util.algorithm.SortUtil; q:iB}ch5R
(SH<]@s
/** .zm/GtOV@
* @author treeroot M/Twtq-`H
* @since 2006-2-2 ON.1'Wk?
* @version 1.0 !L|}/u3v
*/ lla?;^,
public class ImprovedMergeSort implements SortUtil.Sort { T6Oah:50EM
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private static final int THRESHOLD = 10; {hP_"nN#
vOF"p4 ^3
/* 5*~]=(BE
* (non-Javadoc) xAZ-_}'tW
* E((U=P}+g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \vKKq/f
*/ aAT!$0H
public void sort(int[] data) { F]fBFDk
int[] temp=new int[data.length]; w6Owfq'v
mergeSort(data,temp,0,data.length-1); NQ9/,M
} K[j~htC{I"
3RbPc8($Y
private void mergeSort(int[] data, int[] temp, int l, int r) { jV)4+D
int i, j, k; z\kiYQ6kA
int mid = (l + r) / 2; eH0^d5bH
if (l == r) N(7UlS,u'
return; ,NA _pvH)
if ((mid - l) >= THRESHOLD) Z)Zc9SVC
mergeSort(data, temp, l, mid); K}OY!|
else j=],n8_i
insertSort(data, l, mid - l + 1); _ Vo35kA
if ((r - mid) > THRESHOLD) K{vn[}
mergeSort(data, temp, mid + 1, r); bJWPr
else L-,C5^
insertSort(data, mid + 1, r - mid); }Dc7'GZ
w>TlM*3D/
for (i = l; i <= mid; i++) { ]b+Nsr~
temp = data; Szb#:C
} h!zev~u1)`
for (j = 1; j <= r - mid; j++) { SNUq
temp[r - j + 1] = data[j + mid]; F\Z|JCA
} SQSPdR+
int a = temp[l]; VfFXH,j
int b = temp[r]; flXDGoW
for (i = l, j = r, k = l; k <= r; k++) { ~BbF:DS
if (a < b) { d#W>"Cqxqa
data[k] = temp[i++]; `B%IHr
a = temp; a3wk#mH
} else { K|ZB!oq
data[k] = temp[j--]; #Rj&PzBe
b = temp[j]; h1U8z)D#
} X:Iam#H
} tDj/!L`
} kc:>[{9
[" PRxl
/** YD@n8?~$$
* @param data LJ{P93aq`^
* @param l {;2Gl$\r
* @param i D=^|6}
*/ i^Ip+J+[
private void insertSort(int[] data, int start, int len) { kp=wz0#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?]]7PEee*
} 0;/},B[A
} -|WQs'%O
} '[zy%<2sL
} VZ1u/O?ub
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堆排序： Yp@i{$IUW
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package org.rut.util.algorithm.support; -"}mmTa*<
j` 5K7~hv
import org.rut.util.algorithm.SortUtil; 5<RZht$i
Fu$JI8
/** huTWoMU
* @author treeroot n]<>$
* @since 2006-2-2 Xf/qUao
* @version 1.0 _Z0O]>KH
*/ #[ TOe
public class HeapSort implements SortUtil.Sort{ ]7/6u.G7R
mNDd>4%H_
/* (non-Javadoc) CYHo~VIK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g54b}vzm
*/ y yqya[-11
public void sort(int[] data) { Kd|@
MaxHeap h=new MaxHeap(); @ rG=>??k
h.init(data); @@pI>~#zh
for(int i=0;i h.remove(); =hq+9 R8=
System.arraycopy(h.queue,1,data,0,data.length); #k/NS
} [:"7B&&A
S uo
private static class MaxHeap{ XR@C^d
{IG5qi?/E)
void init(int[] data){ 1c19$KHu
this.queue=new int[data.length+1]; abw7{%2
for(int i=0;i queue[++size]=data; AD0pmD
fixUp(size); cd3;uB4\,
} ZGgM-O1
} L; (J6p]h
T*bBw
private int size=0; T~G~M/
tEl_a~s*3?
private int[] queue; a`E1rK'
=&-+{txs
public int get() { iRsK;)<
return queue[1]; '^ob3N/Y [
} xL#UMvZ>;h
@";zM&
public void remove() { upefjwm
SortUtil.swap(queue,1,size--); Bf+7;4-
fixDown(1); svj0;x5
} u~7 ,v
file://fixdown ~Kll.
private void fixDown(int k) { )|Md"r_B
int j; =H)"t:xE
while ((j = k << 1) <= size) { X0&[cyP!
if (j < size %26amp;%26amp; queue[j] j++; D%,AdR"m
if (queue[k]>queue[j]) file://不用交换 fKQq]&~ H
break; Q3P*&6wA
SortUtil.swap(queue,j,k); >u/ T`$
k = j; :J~sz)n4
} D)){"Q!b
} uNXKUJ V0
private void fixUp(int k) { R\ZyS )~l
while (k > 1) { _I A{I
int j = k >> 1; e)):U
if (queue[j]>queue[k]) d7i 0'R
break; W,-fnJk
SortUtil.swap(queue,j,k); kr{eC/Q"
k = j; J{qpGRQNa
} m)oGeD( !
} G~FAChI8![
sUTfY|<7|
} Lju)q6
,#blY~h8^
} ffgb3
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SortUtil： $5v:z
rc()Eo50
package org.rut.util.algorithm; IuN:*P
0.kQqy~5
import org.rut.util.algorithm.support.BubbleSort; _YPu
import org.rut.util.algorithm.support.HeapSort; KoF_G[m
import org.rut.util.algorithm.support.ImprovedMergeSort; HCOE'24I
import org.rut.util.algorithm.support.ImprovedQuickSort; Bq*aP*jv
import org.rut.util.algorithm.support.InsertSort; ,o68xfdZVW
import org.rut.util.algorithm.support.MergeSort; [_w;=l0 ;
import org.rut.util.algorithm.support.QuickSort; S*9qpes-m|
import org.rut.util.algorithm.support.SelectionSort; qdY*y&}"J
import org.rut.util.algorithm.support.ShellSort; Udl8?EVSz
%wk3&EC.
/** MFqM6_
* @author treeroot /KLs+^c5
* @since 2006-2-2 9n!IdqKN
* @version 1.0 }n[<$*W^
*/ SQ0t28N3h
public class SortUtil { 2GW.'\D
public final static int INSERT = 1; OHyBNJ
public final static int BUBBLE = 2; ^!yJ;'H\
public final static int SELECTION = 3; } Rs@
public final static int SHELL = 4; ]O1}q!s
public final static int QUICK = 5; R(dOQ. ;
public final static int IMPROVED_QUICK = 6; \ N;%
public final static int MERGE = 7; rQM$lJ[x
public final static int IMPROVED_MERGE = 8; o{I]c#W
public final static int HEAP = 9; HI%#S&d
VyWPg7}e
public static void sort(int[] data) { ie9,ye"
sort(data, IMPROVED_QUICK); *C"-$WU3o
} 8sz|9~
private static String[] name={ BMxe)izT;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H){lXR/#u
}; +x_9IvaW&?
29~Bu5
private static Sort[] impl=new Sort[]{ .^aqzA=]
new InsertSort(), u{d\3-]/
new BubbleSort(), W&HF*Aw
new SelectionSort(), jGaI6G'N
new ShellSort(), lk`,s
new QuickSort(), ),;O3:n
new ImprovedQuickSort(), zd-qQ.j0
new MergeSort(), (yxHXO9N
new ImprovedMergeSort(), %SJ2W>e
new HeapSort() @b5zHXF83E
}; .M zAkZ=
Wv4o:_}
public static String toString(int algorithm){ ]UFbG40Zo
return name[algorithm-1]; WO<a^g {
} SdM@7%UK
71(C@/J
public static void sort(int[] data, int algorithm) { ?@LqrKj11
impl[algorithm-1].sort(data); -lDAxp6p
} X^c2
(>usa||
public static interface Sort { ^j>w<ljzz
public void sort(int[] data); c3]X#Qa#m$
} n,vs(ZL:
zc#$hIi
public static void swap(int[] data, int i, int j) { b<1+q{0r
int temp = data; IyJHKDFk
data = data[j]; nlsif
data[j] = temp; ~]LkQQ'
} 8\])p sb9
} &8R!`uh1