[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; PLX>-7@
} =-"c*^$]
int i1=l; nhT-Ido
int i2=mid+1; v+G=E2Lhv
for(int cur=l;cur<=r;cur++){ -F@L}|
if(i1==mid+1) j$Ab>}g]
data[cur]=temp[i2++]; cl@g
else if(i2>r) k^\pU\J
data[cur]=temp[i1++]; 5]5 KB;
else if(temp[i1] data[cur]=temp[i1++]; =Yz'D|=t
else q{0R=jb
data[cur]=temp[i2++]; :|+Qe e
} ?QZ"JX])
} E&`Nh5JfC
1oiRWRe
} JH8}Ru%Z
l{Dct\ #s
改进后的归并排序: jYRP8 Yi
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package org.rut.util.algorithm.support; _oG&OJ@
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import org.rut.util.algorithm.SortUtil; =K\r-'V
~PnTaAPJ
/** Fv74bC%
* @author treeroot =WIJ>#Go<
* @since 2006-2-2 1vzb8.
* @version 1.0 X]%itA
*/ *v ?m6R=)h
public class ImprovedMergeSort implements SortUtil.Sort { A A^{B
zCv"]%
private static final int THRESHOLD = 10; #bH_Dg5I
C;+h.;}<D
/* ?e[lr>-
* (non-Javadoc) e:'?*BYVg3
* ,:LA.o}h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I,yC D7l_
*/ !|ak^GE:(%
public void sort(int[] data) { sEMQ
int[] temp=new int[data.length]; p]T<HGJ P
mergeSort(data,temp,0,data.length-1); +N`ua
} J(DN!
M(x$xAiD
private void mergeSort(int[] data, int[] temp, int l, int r) { ':{>a28=
int i, j, k; t>=fTkB
int mid = (l + r) / 2; &i+Ce
if (l == r) 7x);x/#8Z
return; WOzf]3Xcj
if ((mid - l) >= THRESHOLD) JjaoOe
mergeSort(data, temp, l, mid); i4Lc$20?d
else #7ohQrP
insertSort(data, l, mid - l + 1); [e[<p\]
if ((r - mid) > THRESHOLD) Hso|e?Z
mergeSort(data, temp, mid + 1, r); %`Z+a.~U
else S*o[ZA
insertSort(data, mid + 1, r - mid); Wbr+KX8)
xvl3vAN9
for (i = l; i <= mid; i++) { A, 3bC
temp = data; f+8wl!M+6
} o1M$.*
for (j = 1; j <= r - mid; j++) { n3AaZp[
temp[r - j + 1] = data[j + mid]; (aOv#Vor]%
} {9UEq0
int a = temp[l]; >leU:7
int b = temp[r]; 4=<tWa|@9
for (i = l, j = r, k = l; k <= r; k++) { 1`ayc|9BR
if (a < b) { q$I:`&
data[k] = temp[i++]; hn#1%p6t
a = temp; q`-;AG|xF
} else { %_!bRo
data[k] = temp[j--]; =UUU$hq2
b = temp[j]; ,]bB9tid
} [!!Q,S"
} rj(T~d4
} ,eTU/Q>{,&
T5a*z}L5
/** h1'\:N`
* @param data pe^u$YE
* @param l PRHCrHs
* @param i Fu!RhsW5j
*/ J8mdoVt
private void insertSort(int[] data, int start, int len) { SkmT`*v@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :POj6j/
} ^0/j0]O
} ;L']e"G
} CrwwU7qKL
} _/i4MtM
n2iJ%_zp
堆排序： ty8v 6J#
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package org.rut.util.algorithm.support; X5j1`t,
Djg,Lvhm
import org.rut.util.algorithm.SortUtil; J0@X<Lt U
oYukLr
/** [VE8V-
* @author treeroot /`mks1:pK
* @since 2006-2-2 <J^MCqp!v
* @version 1.0 h*-Pr8
*/ dq]0X?[6
public class HeapSort implements SortUtil.Sort{ rzt Ru
ZIQ [bE7
/* (non-Javadoc) %}%Qc6.H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z]B~{!W1
*/ |UX(+;n
public void sort(int[] data) { ]*AR,0N&
MaxHeap h=new MaxHeap(); {WYX~Mvvj
h.init(data); ZpnxecJUJ
for(int i=0;i h.remove(); Za1QC;7
System.arraycopy(h.queue,1,data,0,data.length); K*~0"F>"0
} H'
3f,hw5R
private static class MaxHeap{ /pT=0=
B]Thn
void init(int[] data){ *{L)dW+:
this.queue=new int[data.length+1]; H!$o$}A
for(int i=0;i queue[++size]=data; #w' kV#
fixUp(size); [Al&
} iKT[=c
} cLLbZ=`
iv4H#rJ
private int size=0; `hQ5VJo
Fvbh\m ~
private int[] queue; 4rLL[??
]@phF _
public int get() { S[J}UpV
return queue[1]; _no*k?o*
} ?vbvBu{a
Z'.AAOG
public void remove() { ;IZwTXu!S
SortUtil.swap(queue,1,size--); c}2jmwq
fixDown(1); eQ]~dA8>
} `~By)?cT_>
file://fixdown /w}u3|L$
private void fixDown(int k) { t:'Mh9h7u
int j; wY[+ZT
while ((j = k << 1) <= size) { L6|oyf
if (j < size %26amp;%26amp; queue[j] j++; ^SF&=NpV
if (queue[k]>queue[j]) file://不用交换 ]SLP}Jwy
break; toBHkiuD
SortUtil.swap(queue,j,k); 4bYK}oS
k = j; 8ap%?
} 7_inJ$
} v@ lM3_rbO
private void fixUp(int k) { -#N.X_F
while (k > 1) { VgZsB$Ori
int j = k >> 1; U_I5fK=
if (queue[j]>queue[k]) ^f4s"T
break; -C(crn
SortUtil.swap(queue,j,k); `T5W}p[6
k = j; ]1#e#M]#
} 6[ j.@[t
} ~E2KZm
lww!-(<ww
} Ng~FEl
H[U!%Z
} 3cK I
Ws|j#X<
SortUtil： 2{H@(Vgpbr
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package org.rut.util.algorithm; #_^Lb]jkM
e#$]Y?,
import org.rut.util.algorithm.support.BubbleSort; j i7[nY
import org.rut.util.algorithm.support.HeapSort; Lr~=^{
import org.rut.util.algorithm.support.ImprovedMergeSort; (ROY?5 @c
import org.rut.util.algorithm.support.ImprovedQuickSort; $QN"wL||
import org.rut.util.algorithm.support.InsertSort; wsI`fO^A8
import org.rut.util.algorithm.support.MergeSort; K;?m';z0
import org.rut.util.algorithm.support.QuickSort; w"-Lc4t+
import org.rut.util.algorithm.support.SelectionSort; /<|%yE&KhJ
import org.rut.util.algorithm.support.ShellSort; U`,6 * MS
"Q@ronP(~
/** KBx6NU?;PO
* @author treeroot ^:^9l1]
* @since 2006-2-2 eg;~zv
* @version 1.0 Z`ID+
*/ 5B3G @KR
public class SortUtil { o,AAC
public final static int INSERT = 1; aBNc(?ri
public final static int BUBBLE = 2; dxMOn
public final static int SELECTION = 3; jCOIuw
public final static int SHELL = 4; )rn*iJ.e8
public final static int QUICK = 5; OEA&~4&{7
public final static int IMPROVED_QUICK = 6; 'vbsvT
public final static int MERGE = 7; n|9-KTe7|*
public final static int IMPROVED_MERGE = 8; :LF?
public final static int HEAP = 9; 5\:^y'g[
r1 !@hT
public static void sort(int[] data) { Vc&!OE
sort(data, IMPROVED_QUICK); I9_RlAd
} ;g+N&)n
private static String[] name={ lb4Pcdj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~=M7 3U#
}; +hg3I8q:
fg_4zUGM+g
private static Sort[] impl=new Sort[]{ .,<1%-R34q
new InsertSort(), J\twZ>w~0
new BubbleSort(), y" RF;KW>
new SelectionSort(), $p#Bi-&
new ShellSort(), AG`L64B
new QuickSort(), Cjm`|~&e+
new ImprovedQuickSort(), IA8f*]?
new MergeSort(), &Cr:6W@A
new ImprovedMergeSort(), =_JjmTy;a
new HeapSort() mqD}BOif
}; LM~[@_j
#+Ir>GU
public static String toString(int algorithm){ #L=x%8B
return name[algorithm-1]; AYqX|
} ey7 f9
!;q&NHco
public static void sort(int[] data, int algorithm) { _{I3i:f9X8
impl[algorithm-1].sort(data); +"\sc;6m.
} fInb[
0L2F[TN
public static interface Sort { DR5\45v
public void sort(int[] data); x-WmMfcz&
} ak$f"py x
cOmw?kA*G
public static void swap(int[] data, int i, int j) { n9W(bG o
int temp = data; -`*a'p-=
data = data[j]; V#2+"(7h
data[j] = temp; ?pW`cFLDHF
} GZN ^k+w
} 6M @[B|Q(