[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; q<?r5H5
} cUZ^,)8 Z
int i1=l; vX"jL
int i2=mid+1; @!s(Zkpev
for(int cur=l;cur<=r;cur++){ S3_QOL
if(i1==mid+1) _D."KU|
data[cur]=temp[i2++]; z;[Z'_B
else if(i2>r) R,[+9U|4V
data[cur]=temp[i1++]; k0!D9tk
else if(temp[i1] data[cur]=temp[i1++]; _JXb|FIp
else s h^&3}
data[cur]=temp[i2++]; S[oRq
} X.<2]V7!
} zd#/zUPI
b. oA}XP
} [bJAh ` I
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改进后的归并排序: `PvGfmYOl
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package org.rut.util.algorithm.support; t!}?nw%$
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import org.rut.util.algorithm.SortUtil; jRzQ`*KC#
Bc2PF;n
/** @X*r5hjc
* @author treeroot \.jT"Z~
* @since 2006-2-2 9{V54ue;
* @version 1.0 5T;,wQ<
*/ IOi6' 1l
public class ImprovedMergeSort implements SortUtil.Sort { p&ml$N9fd
9b*1-1"
private static final int THRESHOLD = 10; [sH[bmLR
UHW;e}O5
/* rC!~4xj-
* (non-Javadoc) Gr?[s'Ze
* y1:#0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g>*t"Rf:
*/ |);-{=.OdQ
public void sort(int[] data) { =!%+ sem
int[] temp=new int[data.length]; |k^ *
mergeSort(data,temp,0,data.length-1); @7aSq-(_l*
} /^z5;aG
h&6v&%S/L
private void mergeSort(int[] data, int[] temp, int l, int r) { v/yt C/WH"
int i, j, k; W!BIz&SY:-
int mid = (l + r) / 2; tgbr/eCoU
if (l == r) ^.9I[Umua
return; 7}<057Xn'
if ((mid - l) >= THRESHOLD) gnp\z/'>
mergeSort(data, temp, l, mid); N yK7TKui
else 6M`N| %
insertSort(data, l, mid - l + 1); C,xM)V^a
if ((r - mid) > THRESHOLD) c{u~=24;%#
mergeSort(data, temp, mid + 1, r); l;dZJ_Ut$
else 8f<[Bu ze
insertSort(data, mid + 1, r - mid); OxraaN`
/8SQmh$+e
for (i = l; i <= mid; i++) { bvMa|;f1
temp = data; zU'\r~c
} x`vIY-DS
for (j = 1; j <= r - mid; j++) { tzhkdG
temp[r - j + 1] = data[j + mid]; xED`8PCfu
} ,/;mK_6
int a = temp[l]; )k8=< =s
int b = temp[r]; ,HxsU,xiG
for (i = l, j = r, k = l; k <= r; k++) { 0NB6S&lI^k
if (a < b) { XACbDKyS
data[k] = temp[i++]; =;/4j'1}9
a = temp; vRLkz4z
} else { F-)lRGw
data[k] = temp[j--]; w`vJE!4B
b = temp[j]; 2@ >04]
} [y73 xF
} U3+{!}gn
} |yi3y `f
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/** a<%WFix
* @param data {g2cm'hD
* @param l g< cR/
* @param i 4'W|'4'b
*/ \]U@=w
private void insertSort(int[] data, int start, int len) { 9lA@ K[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v2dCkn /
} /vl]Oa&U
} k[l+~5ix
} \#[W8k<Z
} ,P ?TYk
.$DB\jJXjV
堆排序： {4 !%'~
S<f&?\wK=v
package org.rut.util.algorithm.support; %Yg;s'F>#q
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import org.rut.util.algorithm.SortUtil; BciwS_Qx
ch<Fi%)
/** .9Bimhc6K
* @author treeroot 0\g;^Zpi
* @since 2006-2-2 :b;2iBVB
* @version 1.0 J.:"yK""
*/ . ({aPtSt!
public class HeapSort implements SortUtil.Sort{ d3T|N\(DL
.b]g#Du=
/* (non-Javadoc) $Trkow%F]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g*ES[JJH&
*/ j3VM!/
public void sort(int[] data) { ?L#C'Lz2+
MaxHeap h=new MaxHeap(); GEwgwenv
h.init(data); Tfhg\++u
for(int i=0;i h.remove(); qFW- ~T
System.arraycopy(h.queue,1,data,0,data.length); 2GcQh]ohc
} kf0zL3|
r!yrPwKL
private static class MaxHeap{ Z;XR%n8
US'X9=b_
void init(int[] data){ SY["(vP%#
this.queue=new int[data.length+1]; E8=.TM]L
for(int i=0;i queue[++size]=data; F&;g< SD
fixUp(size); "*#$$e53A
} *(L4rK\2
} @g[p>t> *
7*OO k"9
private int size=0; nTY`1w.;
oScHmGFv
private int[] queue; 79uL"N;
0F`@/C1y55
public int get() { p{!aRB%
return queue[1]; KwWqsuju
} '/b,3:
8;p6~&).C~
public void remove() { O?D*<rwD
SortUtil.swap(queue,1,size--); 6,uW{l8L
fixDown(1); q>r9ooN
} nq8mzI
file://fixdown x+nrdW+
private void fixDown(int k) { -a]oN:ERb
int j; W$B>O
while ((j = k << 1) <= size) { xx nW1`]
if (j < size %26amp;%26amp; queue[j] j++; k5xzC&
if (queue[k]>queue[j]) file://不用交换 Ne@Iv)g?
break; zkI\ji
SortUtil.swap(queue,j,k); wX#=l?,K
k = j; :Py/d6KK
} G#)>D$Ck#
} KKa"Ba$g
private void fixUp(int k) { D._q'v<
while (k > 1) { 7w|W\J^7r
int j = k >> 1; ~{*FjZ`h
if (queue[j]>queue[k]) +J]3)8y+
break; a>.2Q<1
SortUtil.swap(queue,j,k); =:1f 0QF
k = j; hqFK2 lR
} _z)G!_7.>\
} 4NQS'*%D
bh6Mh<+
} $9+}$lpPd
WA8Qt\Q
} 2 Nr j@q
$[VKM|Zjw
SortUtil： {LbcG^k
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package org.rut.util.algorithm; 7X2g"2\Wm
G! zV=p
import org.rut.util.algorithm.support.BubbleSort; 4M6o+WV
import org.rut.util.algorithm.support.HeapSort; 68*h#&
import org.rut.util.algorithm.support.ImprovedMergeSort; O!hg@[\B+
import org.rut.util.algorithm.support.ImprovedQuickSort; tcwE.>5O
import org.rut.util.algorithm.support.InsertSort; sn+i[
import org.rut.util.algorithm.support.MergeSort; uwyzxj
import org.rut.util.algorithm.support.QuickSort; R4_4FEo
import org.rut.util.algorithm.support.SelectionSort; {Lk~O)E
import org.rut.util.algorithm.support.ShellSort; 37v!:xF!
^p|MkB?uM
/** AJiEyAC!)5
* @author treeroot pOyM/L
* @since 2006-2-2 .*r?zDV
* @version 1.0 "k)( ,
*/ sI@m"A
public class SortUtil { X'TQtI
public final static int INSERT = 1; zKx?cEpE
public final static int BUBBLE = 2; '6Ybf
public final static int SELECTION = 3; fS>W-
public final static int SHELL = 4; "e69aAA,
public final static int QUICK = 5; GLcf'$l
public final static int IMPROVED_QUICK = 6; R."<he ;
public final static int MERGE = 7; D}SRr,4v
public final static int IMPROVED_MERGE = 8; V.XHjHT
public final static int HEAP = 9; rG:IS=
dFjB &#Tl
public static void sort(int[] data) { d0Py[37V
sort(data, IMPROVED_QUICK); qy`@\)S/5
} ^W eE%"
private static String[] name={ K,&)\r kzD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O/e5LA
}; |+~CdA
^'lx5+-
private static Sort[] impl=new Sort[]{ 05gU~6AF
new InsertSort(), =W.b7 6_
new BubbleSort(), #|v\UJ:Pf/
new SelectionSort(), L~"~C(g
new ShellSort(), Lp5LRw
new QuickSort(), S)iv k x
new ImprovedQuickSort(), .>zXz%p
new MergeSort(), MH.,dB&
new ImprovedMergeSort(), Vk5}d[[l
new HeapSort() 'v GrbmK
}; j5Vyo>
KqG:o+V=
public static String toString(int algorithm){ BKPXXR
return name[algorithm-1]; n[|&nv6x
} y#F( xm+L
^GQ+,0Yy
public static void sort(int[] data, int algorithm) { J(ZYoJ
impl[algorithm-1].sort(data); T6=,A }t-
} 3lcd:=
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public static interface Sort { jAB~XaT,
public void sort(int[] data); fW~r%u .y
} a x4V(
%D< =6suW
public static void swap(int[] data, int i, int j) { 7m~.V[l1
int temp = data; ;{[&&qMwU
data = data[j]; 0-M.>fwZ=
data[j] = temp; |k1(|)%G
} 8iaP(*J
} m/Ou$