[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; 0'`S,
} Ps3~{zH`
int i1=l; `Ug tvo
int i2=mid+1; g8RPHjvZ
for(int cur=l;cur<=r;cur++){ W!91tzs:
if(i1==mid+1) /D'M24
data[cur]=temp[i2++]; ?_%u)S*g
else if(i2>r) ya.n'X14
data[cur]=temp[i1++]; QjJfE<h
else if(temp[i1] data[cur]=temp[i1++]; Z5$fE7ba+
else *}w+68eO
data[cur]=temp[i2++]; LL.x11o3
} wG8 nw;
} f0DK>L
}RIU8=P
} wx*1*KZ
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改进后的归并排序: 6WeM rWx
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package org.rut.util.algorithm.support; -9d%+O~v6~
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import org.rut.util.algorithm.SortUtil; RkA8
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/** {~'H
* @author treeroot u h)o
* @since 2006-2-2 CW p#^1F
* @version 1.0 k3>YBf`fC
*/ W:vr@e6
public class ImprovedMergeSort implements SortUtil.Sort { 'mE^5K
'1-maM\r
private static final int THRESHOLD = 10; Z7z]2v3}c
:IZ"D40m"
/* JYJU&u
* (non-Javadoc) wXbsS)#/
* ugLlI2 nJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xb,T{.3@
*/ )M:)y
public void sort(int[] data) { "}zt`3
int[] temp=new int[data.length]; q=4Bny0
mergeSort(data,temp,0,data.length-1); \k; n20\u
} i%F<AY\O)
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private void mergeSort(int[] data, int[] temp, int l, int r) { 0%#\w*X8
int i, j, k; N=~~EtX
int mid = (l + r) / 2; J+ts
if (l == r) TH:W#Ot
return; 59lj7
if ((mid - l) >= THRESHOLD) sJU`u'w
mergeSort(data, temp, l, mid); qybxXK:
else ]iVLHVqz
insertSort(data, l, mid - l + 1); /iG7MC\`
if ((r - mid) > THRESHOLD) p!DP`Ouc3\
mergeSort(data, temp, mid + 1, r); =wrP:wYF
else RB$ z]/=
insertSort(data, mid + 1, r - mid); [Y8S[YY
cbYK5fj"T
for (i = l; i <= mid; i++) { (s&&>M]r_
temp = data; ?JXa~.dA
} #^0(
for (j = 1; j <= r - mid; j++) { g)1X&>
temp[r - j + 1] = data[j + mid]; dYF=c
} 1m)M;^_
int a = temp[l]; !MV@) (.
int b = temp[r]; W5 ec
for (i = l, j = r, k = l; k <= r; k++) { #|f~s
if (a < b) { JN(-.8<
data[k] = temp[i++]; uMd. j$$
a = temp; >2lwWXA
} else { pj8azFZ
data[k] = temp[j--]; g7n"
b = temp[j]; ?fK1
} E!mmLVa9
} qZ+H5AG2
} v&;:^jJ8
D*2\{W/
/** Gu;OVLR|
* @param data ;;#`#v
* @param l tj5giQ3DG)
* @param i z7T0u.4Ss
*/ tC)6
private void insertSort(int[] data, int start, int len) { 6N" l{!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~x]9SXD%
} Dl,`\b@Fw3
} 2*1ft>Uty
} RN9;kB)c
} RUo9eQIPD
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堆排序： 4XJiIa?
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package org.rut.util.algorithm.support; $NG++N
Mvcfk$pA
import org.rut.util.algorithm.SortUtil; Z :nbZHByh
$k%Z$NSN=
/** :YO@_
* @author treeroot sWqM?2g
* @since 2006-2-2 -d=WV:G%e
* @version 1.0 >*1}1~uU`'
*/ qTmD'2
public class HeapSort implements SortUtil.Sort{ | C+o;
VR0=SE
/* (non-Javadoc) 1cC1*c0Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c0rk<V%5+
*/ m9":{JI.w
public void sort(int[] data) { D1T@R)j
MaxHeap h=new MaxHeap(); #b)e4vwCq
h.init(data); 7~UR!T9
for(int i=0;i h.remove(); KoBW}x9Jp
System.arraycopy(h.queue,1,data,0,data.length); DuF"*R~et
} {hdPhL
dh -,E
private static class MaxHeap{ d)ahF[82
m%r/O&g
void init(int[] data){ r'4:)~]s
this.queue=new int[data.length+1]; eJ@~o{,?>
for(int i=0;i queue[++size]=data; GbZ;#^S
fixUp(size); K=\O5#F?3
} jNyoN1M
} "484n/D
[V}, tO|
private int size=0; @g-Tk
i$^ZTb^
private int[] queue; k%81f'H
/-M@[p&
public int get() { ,kM)7!]N
return queue[1]; /X*oS&-M
} #x@eDnb_
=Lp7{09u
public void remove() { 3$/ 4wH^
SortUtil.swap(queue,1,size--); ccJM>9
fixDown(1); [\e@_vY@OH
} EbQa?
file://fixdown z\!K<d"Xv
private void fixDown(int k) { X[3}?,aqL
int j; Ip *g'
while ((j = k << 1) <= size) { wdas1
if (j < size %26amp;%26amp; queue[j] j++; cj$6
if (queue[k]>queue[j]) file://不用交换 }}{Yw
break; H=^K@Ti:
SortUtil.swap(queue,j,k); <V&5P3)d9
k = j; Ey`h1Y
} Gc,_v3\
} K|r Lkl9
private void fixUp(int k) { 5/0j}_pP
while (k > 1) { 1DJekiWf
int j = k >> 1; (p)!Mq "^
if (queue[j]>queue[k]) sM2MLh'D
break; `BXS)xj
SortUtil.swap(queue,j,k); c-4STPNQi
k = j; $'wq1u
} ku&k'V
} ``K#}3
j}JZ
} q6d~V]4:
,FSrn~-j9
} T6BFX0$
A#y@`}]!'
SortUtil： r,(Mu
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package org.rut.util.algorithm; &, a3@i
Fke//- R
import org.rut.util.algorithm.support.BubbleSort; o>]`ac0b}Y
import org.rut.util.algorithm.support.HeapSort; C(?blv-vM0
import org.rut.util.algorithm.support.ImprovedMergeSort; V-yUJ#f8[
import org.rut.util.algorithm.support.ImprovedQuickSort; tT%/r,
import org.rut.util.algorithm.support.InsertSort; Ri7((x]H"
import org.rut.util.algorithm.support.MergeSort; r%]Qlt~K
import org.rut.util.algorithm.support.QuickSort; Jh/ E@}'
import org.rut.util.algorithm.support.SelectionSort; X` YwP/D
import org.rut.util.algorithm.support.ShellSort; ]+Ixi o
6<'K~1do:
/** &2.u%[gO[q
* @author treeroot (R}ii}&
* @since 2006-2-2 2t#L:vY
* @version 1.0 'DbMF?<.
*/ OS-f(qXd+
public class SortUtil { r7mD{0s*
public final static int INSERT = 1; ",qU,0
public final static int BUBBLE = 2; :D:DnVZ-[@
public final static int SELECTION = 3; Li{~=S@N*
public final static int SHELL = 4; )7cb6jCU
public final static int QUICK = 5; _.)eL3OF
public final static int IMPROVED_QUICK = 6; )6X.Nfkb^k
public final static int MERGE = 7; P5<vf
public final static int IMPROVED_MERGE = 8; aoW6U{\
public final static int HEAP = 9; <yUstz,Xu^
v $({C
public static void sort(int[] data) { V*[b}Xew
sort(data, IMPROVED_QUICK); afG{lWE)
} ~.g3ukt
private static String[] name={ 8MwK.H[U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?}QH=&=^
}; DvXHK
#/S {6c
private static Sort[] impl=new Sort[]{ gXFWxT8S
new InsertSort(), 7A$B{
new BubbleSort(), vb{i
new SelectionSort(), r#i?j}F}
new ShellSort(), :;]Oc
new QuickSort(), P\2M[Gu(Q
new ImprovedQuickSort(), #;KsJb)N.
new MergeSort(), $14:(<
new ImprovedMergeSort(), #\rwLpC1u
new HeapSort() u,.3
}; _"a=8a06G
Zo-$z8
public static String toString(int algorithm){ },$0&/>ft
return name[algorithm-1]; g{k1&|
} ]3{0J
:3h{ A`u
public static void sort(int[] data, int algorithm) { Pt,ebL~
impl[algorithm-1].sort(data); sN=6gCau
} jH;Du2w
`6=-WEo
public static interface Sort { pL1i|O
public void sort(int[] data); hf6f.Z
} <=K qcHb
6 ,ANNj
public static void swap(int[] data, int i, int j) { _u0$,Y?&|
int temp = data; g2cVZ!GIj
data = data[j]; xb2?lL]
data[j] = temp; A;XOT6jv?
} El_Qk[X|A
} [IZM.r`Z