[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; )zkk%mE/IM
} 0%7c?3#
int i1=l; dW Y0
int i2=mid+1; 7rw}q~CE5
for(int cur=l;cur<=r;cur++){ IKb 7#Ut
if(i1==mid+1) lwIU|T<4
data[cur]=temp[i2++]; 6 :K~w<mMJ
else if(i2>r) %,g6:Zc@
data[cur]=temp[i1++]; D0/ \
else if(temp[i1] data[cur]=temp[i1++]; /[`bPKr
else e*;-vS9H
data[cur]=temp[i2++]; 7_)'Re#
} :(VD<"X
} 5 5>^H1M
@[D-2s
} Gdq_T*
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改进后的归并排序: qP-*
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package org.rut.util.algorithm.support; .-T^S"`d|
LSv0zAIe/
import org.rut.util.algorithm.SortUtil; X3 D(2W
\b?z\bC56
/** "yxIaTZu
* @author treeroot @jAuSBy
* @since 2006-2-2 m{gx\a.5
* @version 1.0 % zHsh
*/ @{\q1J>
public class ImprovedMergeSort implements SortUtil.Sort { 1Rc'2Y
xw(KSPN
private static final int THRESHOLD = 10; zFmoo4P/
RNE})B
/* kaQn'5
* (non-Javadoc) RR>Q$K
* 8*V^DM3n-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c7.%Bn,
*/ }A;J-7g6
public void sort(int[] data) { B@D3aOvO
int[] temp=new int[data.length]; Xs$k6C3
mergeSort(data,temp,0,data.length-1); \2~Cn c*O
} v@TP_Ka
6cQh8_/>{#
private void mergeSort(int[] data, int[] temp, int l, int r) { @2cGx/1#
int i, j, k; w0(A7L:L
int mid = (l + r) / 2; xH#R_
if (l == r) 9IZ}}x
return; UmZ#Cm
if ((mid - l) >= THRESHOLD) ig3HPlC
mergeSort(data, temp, l, mid); Vi[* a
else EH<rUv63
insertSort(data, l, mid - l + 1); eSHyA+F
if ((r - mid) > THRESHOLD) _"%mLH=!8
mergeSort(data, temp, mid + 1, r); TC;2K,.#k
else ,rx?Ig}kz
insertSort(data, mid + 1, r - mid); gTcLS|&H
9E~=/Q=
for (i = l; i <= mid; i++) { #u`i4
temp = data; (9$z+Zmm?
} MX2Zm
for (j = 1; j <= r - mid; j++) { //S/pCqED
temp[r - j + 1] = data[j + mid]; =Bu>}$BD
} BWV)> -V
int a = temp[l]; YYwFjA@
int b = temp[r]; Ugzq;}V#
for (i = l, j = r, k = l; k <= r; k++) { -\xNuU
if (a < b) { PRcW}"m]Qg
data[k] = temp[i++]; %H Pwu &
a = temp; ~'k.'O{
} else { musZCg$
data[k] = temp[j--]; '|V"!R)
b = temp[j]; ,\ [R\s
} YMx]i,u'+
} f-&4x_5
} VgLrufJ
#lXwBfBMf
/** :23w[vt=
* @param data ".Z|zt6C
* @param l aGY R:jR$
* @param i IGqg,OEAp
*/ #m[R1G#
private void insertSort(int[] data, int start, int len) { s>hNwb/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *\><MXx
} 8i"v7}
} _dCdyf
} >qkZn7C
} CR3<9=Lv>
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堆排序： OOJg%y*H
8>Az<EF^=#
package org.rut.util.algorithm.support; P]w5`aBM
LCKCg[D
import org.rut.util.algorithm.SortUtil; 6z(7l
Ud@D%?A7
/** ehehTP
* @author treeroot ~5S[Sl
* @since 2006-2-2 03Czx`
* @version 1.0 eU/o I}A
*/ ,`kag~bZ
public class HeapSort implements SortUtil.Sort{ =Ts2a"n
W>$2BsO
/* (non-Javadoc) IL*Ghq{/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .=@xTJh
*/ |hHj7X<?k
public void sort(int[] data) { !7)` g i
MaxHeap h=new MaxHeap(); rD^ b{]E3
h.init(data); I|&<!{Rq
for(int i=0;i h.remove(); W%Jw\ z=
System.arraycopy(h.queue,1,data,0,data.length); ePF)wl;m
} U~h f,Oxi
:De@_m
private static class MaxHeap{ ktE~)G
%a\!|/;6
void init(int[] data){ k2]fUP
this.queue=new int[data.length+1]; va6e]p*Oy
for(int i=0;i queue[++size]=data; r:rM~``
fixUp(size); i3 ?cL4
} n[|*[II
} K,B qVu
i{T mn
private int size=0; 1{%3OG^'
$wnK"k%G
private int[] queue; XR2Gw4]
Tnd)4}2p
public int get() { 2H\}N^;f
return queue[1]; 8kn> ?
} X8m@xFW}
K9z 1'k QH
public void remove() { 6b!F7kyg
SortUtil.swap(queue,1,size--); tNk.|}
fixDown(1); M{(g"ha
} HRP
file://fixdown ^~dBO%M^
private void fixDown(int k) { UQ[!k 6
int j; hD)'bd
while ((j = k << 1) <= size) { `LroH>_
if (j < size %26amp;%26amp; queue[j] j++; p"l GR&b
if (queue[k]>queue[j]) file://不用交换 MZ$x(Vcj
break; st4WjX_Q
SortUtil.swap(queue,j,k); R%%Uw %`
k = j; <vb%i0+b.^
} &7-ENg9 [
} A[7\!bq5
private void fixUp(int k) { p"'knZG
while (k > 1) { &|]GTN`E
int j = k >> 1; m/E$0tf
if (queue[j]>queue[k]) /-FvC^Fj
break; MP LgE.n
SortUtil.swap(queue,j,k); ?**9hu\BG
k = j; W{@,DQ
} ^Kbq.4
} GMv.G
?b,4mDptE
} ^pc?oDPSg
frh!dN
} i#pBzJ
qpt},yn)C
SortUtil： T<a/GE/
fpPB_P{Ua
package org.rut.util.algorithm; tZL|;K
s@$SM,tnn
import org.rut.util.algorithm.support.BubbleSort; 6x*$/1'M3;
import org.rut.util.algorithm.support.HeapSort; 4lp90sa
import org.rut.util.algorithm.support.ImprovedMergeSort; D*_Z"q_B
import org.rut.util.algorithm.support.ImprovedQuickSort; uge~*S
import org.rut.util.algorithm.support.InsertSort; r*F^8_YMK
import org.rut.util.algorithm.support.MergeSort; +sY8<y@%
import org.rut.util.algorithm.support.QuickSort; z JBcz,
import org.rut.util.algorithm.support.SelectionSort; +<})`(8
import org.rut.util.algorithm.support.ShellSort; gl$}t H
9M]%h
/** Jn\@wF9xd
* @author treeroot >?L)+*^
* @since 2006-2-2 ~9We)FvU4
* @version 1.0 S\poa:D`
*/ [Dq@(Q s'
public class SortUtil { hJc^NU5
public final static int INSERT = 1; (ah^</
public final static int BUBBLE = 2; {SRv=g
public final static int SELECTION = 3; SuJa?VU1w
public final static int SHELL = 4; fD* ?JzVY
public final static int QUICK = 5; qx'F9I
public final static int IMPROVED_QUICK = 6; #;(Q \
public final static int MERGE = 7; F'^y?UP[
public final static int IMPROVED_MERGE = 8; `Q1;Y
public final static int HEAP = 9; h 7/wkv\y9
^[=1J
public static void sort(int[] data) { >gTQD\k:D
sort(data, IMPROVED_QUICK); ZUd*[\F~!
} i6-&$<
private static String[] name={ vEZd;40y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XS_Ib\-50
}; S=zW wo$
Ly~s84k_po
private static Sort[] impl=new Sort[]{ Xw'Y &!z
new InsertSort(), *eEn8rAr
new BubbleSort(), .4%6_`E
new SelectionSort(), CubBD+hl*
new ShellSort(), ]vQU(@+I
new QuickSort(), JTS<n4<a
new ImprovedQuickSort(), 5T-CAkR{n
new MergeSort(), 8b|m66#|
new ImprovedMergeSort(), s~b!3l`gu
new HeapSort() vO 3-B
}; yyv<MSU8
'{F Od_uk%
public static String toString(int algorithm){ VthM`~3
return name[algorithm-1]; 8eDKN9kq
} d-ML[^G
6xW17P
public static void sort(int[] data, int algorithm) { KkPr08
impl[algorithm-1].sort(data); /zTx+U.\I
} oFDJwOJ'Bj
!4"<:tSO
public static interface Sort { jlM%Y ZC
public void sort(int[] data); [E:-$R
} rXF=/
(@3?JJ]1
public static void swap(int[] data, int i, int j) { hNL_e3
int temp = data; Wg[ThaZ
data = data[j]; p8X$yv
data[j] = temp; $1.l|
} )%Lgo${[;
} HI!bq%TZ4