[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; 2X@|H
} Q^_*&},V
int i1=l; QUSyVp{$
int i2=mid+1; o;#9$j7QP!
for(int cur=l;cur<=r;cur++){ 4,yS7l
if(i1==mid+1) lls-Nir%
data[cur]=temp[i2++]; ,Zs"r}G^
else if(i2>r) Z_tK3kQa@&
data[cur]=temp[i1++]; #K[UqJ+x
else if(temp[i1] data[cur]=temp[i1++]; |;[%ZE"
else bV~z}V&
data[cur]=temp[i2++]; MeSF,*lP
} UF$JVb
} xKZLXQ'e-
gFx2\QV
} /@!%/Kl
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改进后的归并排序: HLa3lUo
~%8T_R/3
package org.rut.util.algorithm.support; 2^*a$OJ
4J"S?HsW|
import org.rut.util.algorithm.SortUtil; Km=dId7]
.ZzxW
/** [ BpZ{Ql
* @author treeroot jEkO#xI
* @since 2006-2-2 d8o<Q 9
* @version 1.0 qMj'%5/
*/ $XOs(>~"r
public class ImprovedMergeSort implements SortUtil.Sort { <EHgPlQn
Pm Zb!|
private static final int THRESHOLD = 10; X,Q'Xe/
.0[ zZ
/* x bsk
* (non-Javadoc) 8^8fUN4<=
* |IL/F]I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) { !;I4W%!
*/ 2c Pd$j
public void sort(int[] data) { l[G&=/R@H
int[] temp=new int[data.length]; h:J0d~u
mergeSort(data,temp,0,data.length-1); hyPVt6Gkj
} t\/i9CBn
S*5hO) C
private void mergeSort(int[] data, int[] temp, int l, int r) { ,y'E#_cTgQ
int i, j, k; "G&S`8
int mid = (l + r) / 2; wTu_Am
if (l == r) ?aMV{H*Q*
return; orGkS<P
if ((mid - l) >= THRESHOLD) GO|1O|?
mergeSort(data, temp, l, mid); Uzx,aYo X
else 3/j^Ao\fw
insertSort(data, l, mid - l + 1); ry2ZVIFa
if ((r - mid) > THRESHOLD) |6ZH+6[
mergeSort(data, temp, mid + 1, r); N3Yf3rK
else [X"F}ph
insertSort(data, mid + 1, r - mid); feI%QnK)U
42Qfv%*c
for (i = l; i <= mid; i++) { Pa8E.<>
temp = data; ^ |xSU_wa
} }r+(Z.BHM
for (j = 1; j <= r - mid; j++) { 7jZE(|G-
temp[r - j + 1] = data[j + mid]; u@"nVHgMJ
} a (mgz&*
int a = temp[l]; >l!#_a
int b = temp[r]; ++HHUM
for (i = l, j = r, k = l; k <= r; k++) { \Y4>_Mk
if (a < b) { yqY nd<K4
data[k] = temp[i++]; b `7vWyp
a = temp; wOlnDQs
} else { ixf~3Y8
data[k] = temp[j--]; =`1#fQDt
b = temp[j]; 08+cNT
} "IjCuR;#
} %YH+=b:uW
} npj_i /&g
x3`b5^
/** whA
* @param data +bGj(T%+'
* @param l *i=+["A
* @param i FK^JCs^
*/ <fZ?F=
private void insertSort(int[] data, int start, int len) { Ci}v+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &$,%6X"
} 74h[YyVi
} P_[A
} 4dB6cg
} "X.JD
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堆排序： na5:)j4<
j.b7<Vr4;
package org.rut.util.algorithm.support; s%{8$>8V.
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import org.rut.util.algorithm.SortUtil; HkP')= sa
6c?;-5.
/** U:a-Wi+
* @author treeroot 5*q!:$ W
* @since 2006-2-2 _>6xUt
* @version 1.0 L$Uy
*/ :skNEY].
public class HeapSort implements SortUtil.Sort{ V[w Y;wj
%y{f]m
/* (non-Javadoc) ':mw(`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T~238C{vh
*/ o9j*Yz
public void sort(int[] data) { [\Ks+S
MaxHeap h=new MaxHeap(); RSK~<Y@]q{
h.init(data); o:p6[SGd
for(int i=0;i h.remove(); {N \ri{|
System.arraycopy(h.queue,1,data,0,data.length); 9(\eL9^
} yX {CV7%O
j/oM^IY
private static class MaxHeap{ =u*\P!$
|>Q]q
void init(int[] data){ ,vxxp]#5
this.queue=new int[data.length+1]; [YGPcGw
for(int i=0;i queue[++size]=data; WT-BHB1
fixUp(size); fku\O<1
} HP$GI
} FuWMVT`Y
yU e7o4Zm
private int size=0; Rr9K1io$)
l@h|os
private int[] queue; MM+xm{4l
gJ; *?Uq(
public int get() { @scy v@5)F
return queue[1]; $,mljJSQv
} P -O& X
-w[j`}([P9
public void remove() { \1[=t+/
SortUtil.swap(queue,1,size--); @1`!}.Tk
fixDown(1); o~aK[
} ZQ%4]=w
file://fixdown oCCTRLb02
private void fixDown(int k) { #|ppW fZQ
int j; <l:c O$ m
while ((j = k << 1) <= size) { (O&R-5m
if (j < size %26amp;%26amp; queue[j] j++; s>RtCw3,
if (queue[k]>queue[j]) file://不用交换 ^:Mal[IR
break; K4r"Q*h
SortUtil.swap(queue,j,k); JGJy_.C
k = j; ?4[IIX-
} k\ 2.\Lwb
} n^a&@?(+
private void fixUp(int k) { ;fdROI
while (k > 1) { !LG 5q/}&
int j = k >> 1; l/wdu(
if (queue[j]>queue[k]) &n}eF-
break; ,y>%m;jL
SortUtil.swap(queue,j,k); H*gX90{!2
k = j; Z4"SKsJT/>
} 65P*Gu?
} Ib~n}SA
*VbB'u:
} K5h2 ~
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} aJ4y%Gy?
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SortUtil： ;$VQRXq
r Ljb'\<*
package org.rut.util.algorithm; 0LjF$3GpZ
g }%$VUSA
import org.rut.util.algorithm.support.BubbleSort; +K@wh
import org.rut.util.algorithm.support.HeapSort; fMRv:kNAt
import org.rut.util.algorithm.support.ImprovedMergeSort; VV$$t;R/
import org.rut.util.algorithm.support.ImprovedQuickSort; nx2iEXsa
import org.rut.util.algorithm.support.InsertSort; vFz#A/1
import org.rut.util.algorithm.support.MergeSort; @`IMR$'
import org.rut.util.algorithm.support.QuickSort; G1X${x7
import org.rut.util.algorithm.support.SelectionSort; PsV1btq]
import org.rut.util.algorithm.support.ShellSort; gsSUmf1
1-h"1UN2E
/** e[>c>F^
* @author treeroot *(?tf{
* @since 2006-2-2 6JCq?:#ab
* @version 1.0 %6%QE'D
*/ y3,'1^lA
public class SortUtil { ^L,Uz:[J
public final static int INSERT = 1; 0m,3''Q5lO
public final static int BUBBLE = 2; RRasX;zK
public final static int SELECTION = 3; mPmg6Qj(W
public final static int SHELL = 4; $GMva}@G`
public final static int QUICK = 5; (59u<F
public final static int IMPROVED_QUICK = 6; u>K(m))5W3
public final static int MERGE = 7; ]ZbZ]
public final static int IMPROVED_MERGE = 8; f3p)Q<H>`(
public final static int HEAP = 9; mBQp#-1\
"u H VX|`
public static void sort(int[] data) { :/.SrkN(A7
sort(data, IMPROVED_QUICK); ;PA^.RB
} 4GL-3e
private static String[] name={ |})7\o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d:_3V rRZ
}; >k)zd-
fx"~WeVcO
private static Sort[] impl=new Sort[]{ BJL*Dihm[
new InsertSort(), W/\M9
new BubbleSort(), )J"*[[e
new SelectionSort(), >$g+Gx\v4
new ShellSort(), |)4aIa
new QuickSort(), TA~FP#.
new ImprovedQuickSort(), .*x |TPv{
new MergeSort(), (Cc!Iw'0M
new ImprovedMergeSort(), d4r@Gx%BE
new HeapSort() nXg:lCI-uu
}; @ uF$m/g
x+%(z8wD
public static String toString(int algorithm){ l)d(N7HME
return name[algorithm-1]; 4(hHp6}b
} ,lUroO^^
=8p *Ijs
public static void sort(int[] data, int algorithm) { 1Fs:&*=
impl[algorithm-1].sort(data); hE9UWa.Q>
} QrX 5Kwq
Mqk[+n
public static interface Sort { dB=aq34l
public void sort(int[] data); s4&JBm(33N
} in[yrqFb7t
G(*7hs
public static void swap(int[] data, int i, int j) { S+LS!b
int temp = data; HXg#iP^tv
data = data[j]; VOa7qnh4:[
data[j] = temp; #K4lnC2qz
} >}p'E9J?r
} 4Gsbcl{