[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; F?4'>ZW
} v~=ol8J B
int i1=l; eEFT(e5.>3
int i2=mid+1; `Wt~6D e
for(int cur=l;cur<=r;cur++){ Z ' 96d
if(i1==mid+1) mT$tAwzTC{
data[cur]=temp[i2++]; "N"k8,LH
else if(i2>r) nUu|}11(
data[cur]=temp[i1++]; , |B\[0p
else if(temp[i1] data[cur]=temp[i1++]; &BR?;LD
else ?2/M W27w
data[cur]=temp[i2++]; Bd[}A9O[
} $f\-.7OD
} c>k6i?u:X7
L(rjjkH
} spDRQ_qq
HC}C_Q5c91
改进后的归并排序: b%$C!Tq'
eW<hC(
package org.rut.util.algorithm.support; Sgy~Z^
JFkjpBS
import org.rut.util.algorithm.SortUtil; L{Zy7O]"d
M:M<bz Vu
/** CK#PxT?"
* @author treeroot AYerz
* @since 2006-2-2 &^>r<~]
* @version 1.0 X28WQdP,7
*/ 6u8fF|s
public class ImprovedMergeSort implements SortUtil.Sort { ZU6a
4<HJD&@V
private static final int THRESHOLD = 10; t,YAk ?}
4x>e7Kf
/* 3xY]Lqwv
* (non-Javadoc) _P+|tW1
* zYJxoC{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '^AXUb
*/ (J#3+I
public void sort(int[] data) { ?2Dz1#%D
int[] temp=new int[data.length]; Kj5f:{Ur
mergeSort(data,temp,0,data.length-1); w+D5a VJ
} |U0@(H
s os&
private void mergeSort(int[] data, int[] temp, int l, int r) { r}bKVne
int i, j, k; hR{Zh>
int mid = (l + r) / 2; >{8H==P
if (l == r) ~;` #{$/C&
return; 6dlPS{H#U
if ((mid - l) >= THRESHOLD) zD|W3hL2&
mergeSort(data, temp, l, mid); =jh:0Q<43+
else [Xg"B|FD0
insertSort(data, l, mid - l + 1); #nz$RJsX
if ((r - mid) > THRESHOLD) 3~'F^=T.Y
mergeSort(data, temp, mid + 1, r); XCoOs<O:@
else &GAx*.L
insertSort(data, mid + 1, r - mid); aKZD4;
[?2mt`g
for (i = l; i <= mid; i++) { c9 c Nlp
temp = data; %m`QnRX?D
} ij^!TY[0
for (j = 1; j <= r - mid; j++) { -OxHQ
temp[r - j + 1] = data[j + mid]; a#=-Aj-
} =7>~u
int a = temp[l]; QJ?!_2Ax
int b = temp[r]; st>t~a|T
for (i = l, j = r, k = l; k <= r; k++) { =uTV\)
if (a < b) { 4dAhJjhgD
data[k] = temp[i++]; }+1oD{
a = temp; x.Y,]wis
} else { /;1FZ<zU
data[k] = temp[j--]; /0(KKZ)
b = temp[j]; ?;Qk!t2U
} :SGQ4@BV
} O'(vs"eN
} B*7o\~5
hFv}JQJw<
/** }rZp(FG@*
* @param data g<Xwk2_=g
* @param l ,5,4Qf7
* @param i Tc:`TE=2
*/ &2J|v#$F
private void insertSort(int[] data, int start, int len) { :W"ITY(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <}%*4mv
} DFMWgBL
} -M}iDBJx>#
} AH+J:8k
} TrW3@@}j
R >TtAm0N
堆排序： mUxD.;P
HN+z7Q8hH
package org.rut.util.algorithm.support; U@WT;:.T
i^(<E0vS
import org.rut.util.algorithm.SortUtil; oZCO$a
(XQG"G%U6W
/** Qd&j~cG@
* @author treeroot so*7LM?ib>
* @since 2006-2-2 \9DTf:!4Z
* @version 1.0 |rQ;|+.
*/ Rx.0P6s
public class HeapSort implements SortUtil.Sort{ nYHk~<a
J4<*KL~a
/* (non-Javadoc) Nnw iH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;N|6C+y
*/ \=JKeL|6[S
public void sort(int[] data) { J$oJ
MaxHeap h=new MaxHeap(); ge|}'QKow
h.init(data); ]3G2mY;`"%
for(int i=0;i h.remove(); t@\0$V \X
System.arraycopy(h.queue,1,data,0,data.length); `/O_6PQ}
} NbdaP{{
p|%)uA3'/
private static class MaxHeap{ JT+P>\\];'
{<lV=0]
void init(int[] data){ Qa=;Elp:[
this.queue=new int[data.length+1]; })Jp5vv
for(int i=0;i queue[++size]=data; _]g6 3q
fixUp(size); :n=+$Dq
} R0>L[1o
} '@FKgy;B)-
4{TUoI6ii
private int size=0; %/7`G-a.B
_z;N|Xe
private int[] queue; @4pN4v8U
chy7hPxC;
public int get() { )u$A!+fo
return queue[1]; btOC\bUMfD
} N^)OlH
ZHT.+X:_
public void remove() { &^Io\
SortUtil.swap(queue,1,size--); H5n"!!
fixDown(1); ][Kj^7/
} kF?\p`[a
file://fixdown fqi584
private void fixDown(int k) { :Vg,[\I{
int j; +J2=\YO
while ((j = k << 1) <= size) { I?=Q *og
if (j < size %26amp;%26amp; queue[j] j++; @S{,g;8
if (queue[k]>queue[j]) file://不用交换 KM6r}CDHs
break; "(5M }5D
SortUtil.swap(queue,j,k); w*?JW
k = j; KQk;:1hW
} $ _zdjzT
} wS4zAu
private void fixUp(int k) { F=cO=5Iz
while (k > 1) { I<$lpU_H
int j = k >> 1; B}vI<?c
if (queue[j]>queue[k]) q8U]Hyp(`
break; 1t6UI4U!$
SortUtil.swap(queue,j,k); X- zg
k = j; vR-/c
} Gc>\L3u
} u+*CpKR}
)gE:@3
} 5i0<BZDTef
B!:(*lF
} h /on
[bAv|;
SortUtil： R +k\)_F
h' 16"j>
package org.rut.util.algorithm; >y1/*)O9~
wFh{\
import org.rut.util.algorithm.support.BubbleSort; ZEB1()GB
import org.rut.util.algorithm.support.HeapSort; IgVxWh#
import org.rut.util.algorithm.support.ImprovedMergeSort; ^OUkFH;dG?
import org.rut.util.algorithm.support.ImprovedQuickSort; @>BFhH
import org.rut.util.algorithm.support.InsertSort; ^T^fowt=r
import org.rut.util.algorithm.support.MergeSort; M$w^g8F27H
import org.rut.util.algorithm.support.QuickSort; aw(P@9]
import org.rut.util.algorithm.support.SelectionSort; %f@]-
import org.rut.util.algorithm.support.ShellSort; C@K@TfK!M
,+2ytN*
/** lGxG$0`;;
* @author treeroot 46*?hA7@r(
* @since 2006-2-2 "kMpa]<c-6
* @version 1.0 bH&[O`vf
*/ Ls9G:>'rR
public class SortUtil { doG&qXw
public final static int INSERT = 1; )yjHABGJ
public final static int BUBBLE = 2; @+\OoOK<L
public final static int SELECTION = 3; $v+g3+7
public final static int SHELL = 4; X/?3ifP6I
public final static int QUICK = 5; L./UgeZ
public final static int IMPROVED_QUICK = 6; &cZD{Z
public final static int MERGE = 7; ]R0^ }sI
public final static int IMPROVED_MERGE = 8; f F?=W
public final static int HEAP = 9; 7[Y<5T]
K2&pTA~OR
public static void sort(int[] data) { ^NP" m
sort(data, IMPROVED_QUICK); ^Xh9:OBF
} hd\iW7
private static String[] name={ \i{=%[c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {W@Y4Qqq
}; klPc l[.w
*NDzU%X8
private static Sort[] impl=new Sort[]{ ^58'*13ZL
new InsertSort(), ) ><{A
new BubbleSort(), .t\5H<z
new SelectionSort(), 4%B${zP(.}
new ShellSort(), #[IQmU23
new QuickSort(), zc(-dMlK
new ImprovedQuickSort(), t0/fF'GZD
new MergeSort(), sURHj&:t|
new ImprovedMergeSort(), TzVNZDQ`Jl
new HeapSort() Z[|(}9v?~
}; !IP[C?(nB
k)'c$
public static String toString(int algorithm){ JI(8{ f
return name[algorithm-1]; aVd{XVE
} ~W!sxM5(*
LTrn$k3}
public static void sort(int[] data, int algorithm) { 1'M<{h<sP
impl[algorithm-1].sort(data); }nuhLt1
} \07 s'W U
8eL[,uw
public static interface Sort { kpEES{f
public void sort(int[] data); >pr{)bp G
} xEGI'lt
$$AKz\
public static void swap(int[] data, int i, int j) { `XQM)A
int temp = data; +b 1lCa_
data = data[j]; aM~M@wS
data[j] = temp; <vOljo
} wOINcEdx
} haS`V