[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; eu^B
} {Rd){ky@
int i1=l; =IIB~h[TB
int i2=mid+1; F\)?Ntj)>@
for(int cur=l;cur<=r;cur++){ 9'{i |xG
if(i1==mid+1) 5[qCH(6
data[cur]=temp[i2++]; (^U 8wit/
else if(i2>r) *(w#*,lv
data[cur]=temp[i1++]; :!cNkJa
else if(temp[i1] data[cur]=temp[i1++]; x_k@hGSC
else Z7$"0%
data[cur]=temp[i2++]; WxgA{q7:
} JSCZX:5
} ;7 F'xz"
Klv~#9Si
} (mR;MC
}O7!>T
改进后的归并排序: DJ]GM|?
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package org.rut.util.algorithm.support; #rps2nf.j
%F.^cd"
import org.rut.util.algorithm.SortUtil; I<&(Dg|XQ
@pn<x"F5'
/** !!\OB6
* @author treeroot It@1!_tO2
* @since 2006-2-2 6u6,9VG,
* @version 1.0 J+]W*?m
*/ GcHy`bQbiX
public class ImprovedMergeSort implements SortUtil.Sort { ?h1r6?Sug{
&Bc$8ZR
private static final int THRESHOLD = 10; m})EYs1
@D3|Ak1
/* kJfMTfl,
* (non-Javadoc) Jh6 z5xUV
* 1>"Yw|F-|3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Av)N6$&-Z
*/ C8oAl3d+h
public void sort(int[] data) { =Felo8+
int[] temp=new int[data.length]; iN]#XIQ%
mergeSort(data,temp,0,data.length-1); b-Uy&+:X*d
} HUuZ7jJwf
=D}]|ie
private void mergeSort(int[] data, int[] temp, int l, int r) { (&=gM
int i, j, k; o4l=oY:'
int mid = (l + r) / 2; |PY*"Ul
if (l == r) BQ /0z^A
return; Y \oz9tf8
if ((mid - l) >= THRESHOLD) e5HHsR6
mergeSort(data, temp, l, mid); 920 o]Dh=t
else {i!@C(M3
insertSort(data, l, mid - l + 1); %aHQIoxg
if ((r - mid) > THRESHOLD) 9NPOdt:@
mergeSort(data, temp, mid + 1, r); -Y:^<C^^&8
else VW%eB
insertSort(data, mid + 1, r - mid); &1(PS)s
V9SkB3-'
for (i = l; i <= mid; i++) { ndB [f
temp = data; \ld{Z;e
} C3#mmiL-
for (j = 1; j <= r - mid; j++) { qe@ctHpn
temp[r - j + 1] = data[j + mid]; ?_<14%r;
} iAd3w6
int a = temp[l]; ~4t7Q
int b = temp[r]; HZ8k%X}1
for (i = l, j = r, k = l; k <= r; k++) { /^jV-Z`
if (a < b) { w<54mGMOLr
data[k] = temp[i++]; l^WPv/}?
a = temp; 6.>l
} else { F%s'R 0l
data[k] = temp[j--]; q<2b,w==
b = temp[j]; YH .+(tNv
} YYzl"<)c
} dK^WZQ
} z}sBx9;
8`4Z%;1
/** 8<w8"B.i
* @param data :~gG]|F
* @param l E5EAk6
* @param i 2dpTU=K4
*/ 8`?vWJS
private void insertSort(int[] data, int start, int len) { `~S; UG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~,: FZ1wh
} gb,X"ODq
} g5,Bj
} DFUW^0N
} 3ug-cq
_w\A=6=q|
堆排序： a{deN9Qn
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package org.rut.util.algorithm.support; Hb:@]!r>
ns/L./z
import org.rut.util.algorithm.SortUtil; #383W)n
IBY(wx[5S
/** }.$5'VGO
* @author treeroot s<;kTReA
* @since 2006-2-2 MNzWTn@
* @version 1.0 pndAXO:v
*/ Z8yt8O
public class HeapSort implements SortUtil.Sort{ /A{/
6k%Lc4W
/* (non-Javadoc) ,f(:i^iz!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A['0~tOP
*/ e>a4v8
public void sort(int[] data) { WdvXVF
MaxHeap h=new MaxHeap(); (='e9H!3D
h.init(data); ra[*E4P9L*
for(int i=0;i h.remove(); #rs]5tx([
System.arraycopy(h.queue,1,data,0,data.length); b+rn:R
} 6_#:LFke
=iEQE
private static class MaxHeap{ OU /=wpt
k:JlC(^h
void init(int[] data){ cIJqF.k
this.queue=new int[data.length+1]; 9R6]OL)p
for(int i=0;i queue[++size]=data; y~ZYI]` J
fixUp(size); 6$k"B/k
} k9|8@3(h
} y))) {X
BWHH:cX
private int size=0; "F3M m
1[&V6=n
private int[] queue; }kK6"]Tj
%x2_njDd
public int get() { #3WKm*T/
return queue[1]; F=qG+T
} &P,z$H{o@
ZNX=]]HM<n
public void remove() { 6k@(7Mw8A
SortUtil.swap(queue,1,size--); e71dNL'$
fixDown(1); bWe_<'N
} nR2pqaKc
file://fixdown lz-t+LD@ST
private void fixDown(int k) { &0='z
int j; ]LE
while ((j = k << 1) <= size) { h jCkj(b
if (j < size %26amp;%26amp; queue[j] j++; 3tZC&!x?
if (queue[k]>queue[j]) file://不用交换 \ O#6H5F
break; sPod)w?e
SortUtil.swap(queue,j,k); D')m8:>
k = j; 4*vV9*'!
} 9jC>OZ0s
} +"HLx%k
private void fixUp(int k) { F}C.F
while (k > 1) { F6$QEiDu@
int j = k >> 1; A3Lfh6O
if (queue[j]>queue[k]) jZ5 mpYUO
break; K\2UwX
SortUtil.swap(queue,j,k); ;:/<XfZ
k = j; !pMp n%r<]
} k ='c*`IE
} :qQpBr$
G+$A|'<`z
} 13X\PO'9
l^$8;$Rq
} PI5a'k0F
Y4 <
SortUtil： XC D&Im
n:#gKR-J
package org.rut.util.algorithm; Q#2gjR r
;<9dND
import org.rut.util.algorithm.support.BubbleSort; ~}g"Fe
import org.rut.util.algorithm.support.HeapSort; hA0g'X2eC
import org.rut.util.algorithm.support.ImprovedMergeSort; g+xA0qW
import org.rut.util.algorithm.support.ImprovedQuickSort; 06dk K)`
import org.rut.util.algorithm.support.InsertSort; bhqs%B!:
import org.rut.util.algorithm.support.MergeSort; "{&?t}rj+
import org.rut.util.algorithm.support.QuickSort; j=Co
import org.rut.util.algorithm.support.SelectionSort; < SIe5"{
import org.rut.util.algorithm.support.ShellSort; Uo7V)I;o
@o g&l;
/** 9\aR{e,1
* @author treeroot QS*!3?%
* @since 2006-2-2 O6[,K1,
* @version 1.0 xMb)4cw}
*/ FuKp`T-H
public class SortUtil { 9~En;e
public final static int INSERT = 1; !}TZmwf'
public final static int BUBBLE = 2; jYv`kt
public final static int SELECTION = 3; 7a4b,-93
public final static int SHELL = 4; aIA9rn
public final static int QUICK = 5; Eed5sm$H
public final static int IMPROVED_QUICK = 6; \+STl#3*q
public final static int MERGE = 7; (}|QSf:
public final static int IMPROVED_MERGE = 8; ,dG2[<?o
public final static int HEAP = 9; %O!~!'
7E-1 #4
public static void sort(int[] data) { S\F;b{S1
sort(data, IMPROVED_QUICK); e{~3&
} _Kw<4$0<p
private static String[] name={ B}(+\Q$I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [YsN c
}; 2[#7YWs
(eOzntp8
private static Sort[] impl=new Sort[]{ ,Qd;t
new InsertSort(), 2GHmA_7P
new BubbleSort(), '}Tf9L%
new SelectionSort(), POl[]ni=>
new ShellSort(), $Eo)i
new QuickSort(), !D_Qat
new ImprovedQuickSort(), C|@6rr9TA
new MergeSort(), mo$`a6[h<
new ImprovedMergeSort(), |BO!q9633V
new HeapSort() ]4$t'wI.
}; !@r1B`]j+"
2}ttCm
public static String toString(int algorithm){ KXAh0A?&+
return name[algorithm-1]; exnFy-
} ^o*$OM7x
C_&-2Z
public static void sort(int[] data, int algorithm) { ?_!} lg
impl[algorithm-1].sort(data); ;Tn$c70
} +;H-0Q5
G<S(P@ss
public static interface Sort { g^V4+3v|a'
public void sort(int[] data); rr@S|k:|
} ~.FZF
zB8 @Wl
public static void swap(int[] data, int i, int j) { " ^t3VjN
int temp = data; u+&t"B
data = data[j]; -UHa;WH
data[j] = temp; @F+zME
} S#kA$yO
} '`/Qr~]