[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; <AXYqH7%A
} .h }D%Qa
int i1=l; }6(:OB?
int i2=mid+1; :\cJvm
for(int cur=l;cur<=r;cur++){ &Vm[5XW
if(i1==mid+1) ucO]&'hu:
data[cur]=temp[i2++]; 7m$/.\5
else if(i2>r) ]5L3[A4Vu
data[cur]=temp[i1++]; :"^$7
else if(temp[i1] data[cur]=temp[i1++]; Np)!23 "
else >l[N]CQ
data[cur]=temp[i2++]; YRXe j
} L~zet-3UNf
} 9dv~WtH>5
9tgkAU`
} r +fzmb
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改进后的归并排序: <>GyG-q
1 ErYob.p
package org.rut.util.algorithm.support; /otgFQ_
vUNE!j
import org.rut.util.algorithm.SortUtil; @ vudeaup
P$yJA7]j;%
/** }9dgm[C[b
* @author treeroot O@$i
* @since 2006-2-2 u?i1n=Ne
* @version 1.0 Sy55w={
*/ .})8gL7V
public class ImprovedMergeSort implements SortUtil.Sort { /J:j'6
aV.<<OS
private static final int THRESHOLD = 10; t~M_NEPxV
P&VI2k
/* F'!}$oT"
* (non-Javadoc) 4#uoPkLK
* K}@:>;*9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9p<l}h7g
*/ Gz:a1-x
public void sort(int[] data) { :|TBsd|/x
int[] temp=new int[data.length]; Q[^d{e*l
mergeSort(data,temp,0,data.length-1); 8Sa<I.l
} <Th.}=
V7<} ;Lzm
private void mergeSort(int[] data, int[] temp, int l, int r) { FE.:h'^h
int i, j, k; ^EZoP:x(oE
int mid = (l + r) / 2; c`cPGEv
if (l == r) 1^mO"nX
return; v>6r|{
if ((mid - l) >= THRESHOLD) xe'*%3-v)
mergeSort(data, temp, l, mid); 3ly|y{M",
else d!cx%[
insertSort(data, l, mid - l + 1); b%6_LK[
if ((r - mid) > THRESHOLD) Rh|&{Tf
mergeSort(data, temp, mid + 1, r); coBxZyM 1}
else ;S/fe(C
insertSort(data, mid + 1, r - mid); P=.W.oS
tQ"PCm
for (i = l; i <= mid; i++) { fsu'W]f
temp = data; y!j1xnzki
} rQF%;
for (j = 1; j <= r - mid; j++) { Im2g2]
temp[r - j + 1] = data[j + mid]; dJk.J9Z
} b1+Nm
int a = temp[l]; G7u7x?E:B`
int b = temp[r]; \VW.>@s~
for (i = l, j = r, k = l; k <= r; k++) { wp$=lU{B
if (a < b) { e2>gQ p/
data[k] = temp[i++]; l\H9Io3
a = temp; z 'j%.Dd8
} else { \|kU{d0
data[k] = temp[j--]; Ty>`rn
b = temp[j]; z[B7k%}
} n']@Spm
} HRk+2'wjAz
} i^yQ; 2-
) E5ax~
/** 3=z'Ih`
* @param data a83o(9
* @param l HG3jmI+u>
* @param i v+Hu=RZE
*/ 7kO 1d{u6b
private void insertSort(int[] data, int start, int len) { 'O CVUF,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6;ICX2Wq'
} L_/.b%0)
} F4*f_lP
} #+XKfumLk
} w$1.h'2
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堆排序： aXwFQ,
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package org.rut.util.algorithm.support; "w N DjWv
'EXp[*
import org.rut.util.algorithm.SortUtil; @D%VV=N~[
|3s-BKbN4
/** X)\t=><<
* @author treeroot P'zA=Rd&~>
* @since 2006-2-2 pDW .Pav
* @version 1.0 (xMAo;s_
*/ o;}o"-s
public class HeapSort implements SortUtil.Sort{ e%P+KX
.){e7U6b{
/* (non-Javadoc) =]_d pEEQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K7t&fDI
*/ %8}WX@SB
public void sort(int[] data) { 9;E%U2T7
MaxHeap h=new MaxHeap(); O,F]\
h.init(data); n/9 LRZD|w
for(int i=0;i h.remove(); N0y;PVAGu
System.arraycopy(h.queue,1,data,0,data.length); =yk Rki
} t*Z .e.q+
g|&.v2 '
private static class MaxHeap{ @{J!6YGh
iQ]T+}nn_
void init(int[] data){ C:'WX*W
this.queue=new int[data.length+1]; _~X8/p/Qh
for(int i=0;i queue[++size]=data; 6=Y3(#Ddt
fixUp(size); T[Z <bW~0
} `l[6rf_.
} bqw/O`*wfN
I3}HNGvU
private int size=0; i#pjv'C
>5Q^9 9V
private int[] queue; !#,-
@1pW!AdN
public int get() { LW83Y/7
return queue[1]; JEK%yMj
} ^F0k2pB
j:rs+1bc
public void remove() { ~.PPf/ Z8]
SortUtil.swap(queue,1,size--); t7C!}'g&'
fixDown(1); zumR(<l
} dUsJv
file://fixdown sUyCAKebRr
private void fixDown(int k) { `'G),{ j
int j; Q>SPV8s
while ((j = k << 1) <= size) { ?{@!!te@3v
if (j < size %26amp;%26amp; queue[j] j++; Y5h)l<P>B
if (queue[k]>queue[j]) file://不用交换 ?;ALF
break; ~WYE"(
SortUtil.swap(queue,j,k); J[& 7,}
k = j; ]zhq.O >2{
} 4AJu2Hp
} *hk{q/*Qw
private void fixUp(int k) { D*d 3w
while (k > 1) { =B/s HN
int j = k >> 1; JhMrm%
if (queue[j]>queue[k]) ;H m-,W
break; VuO)
SortUtil.swap(queue,j,k); $ sA~p_]
k = j; O9qKwn;q(
} k"DQbUy0L
} o3TBRn,
XqE55Jclp
} )'K!)?&d
`F-Dd4B
} AT8B!m
2t]! {L
SortUtil： 8eS@<[[F#
st'?3A
package org.rut.util.algorithm; -pU\"$nuxH
{*ko=77$*
import org.rut.util.algorithm.support.BubbleSort; @0/@p"j
import org.rut.util.algorithm.support.HeapSort; QX.F1T2e?
import org.rut.util.algorithm.support.ImprovedMergeSort; qN`]*baS
import org.rut.util.algorithm.support.ImprovedQuickSort; (7Ca\H3$
import org.rut.util.algorithm.support.InsertSort; <4!&iU+;
import org.rut.util.algorithm.support.MergeSort; *]>OCGsr
import org.rut.util.algorithm.support.QuickSort; qG2\`+v
import org.rut.util.algorithm.support.SelectionSort; x9&tlKKxf
import org.rut.util.algorithm.support.ShellSort; UQji7K }
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/** qI V`zZc
* @author treeroot I8-&.RE
* @since 2006-2-2 v-r[~
* @version 1.0 RfKxwo|M<
*/ {L2Gb(YLW
public class SortUtil { (?&_6B.*
public final static int INSERT = 1; <1'X)n&Kw$
public final static int BUBBLE = 2; Kz*AzB
public final static int SELECTION = 3; Kj<<&_B.H
public final static int SHELL = 4; 1Sc~Vb|>
public final static int QUICK = 5; 7N~qg 7&
public final static int IMPROVED_QUICK = 6; z_,]fd=o
public final static int MERGE = 7; Fp|rMq
public final static int IMPROVED_MERGE = 8; cwW~ *90#
public final static int HEAP = 9; 7i|hlk;
yg[Oy#^
public static void sort(int[] data) { hDkqEkq1R
sort(data, IMPROVED_QUICK); '`goy%Wd
} aab4c^Ms=
private static String[] name={ ,IVr4#w0=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vM4`u5
}; zH\;pmWiN9
u%IKM\
private static Sort[] impl=new Sort[]{ 7rDRu]
new InsertSort(), 4z3$
new BubbleSort(), _ L:w;Oy9T
new SelectionSort(), y@8399;l
new ShellSort(), {^19.F
new QuickSort(), Sdu@!<?B
new ImprovedQuickSort(), vheAh`u^&
new MergeSort(), q2U"k
new ImprovedMergeSort(), {R8P $
new HeapSort() ZwrYss
}; H><mcah
#&8pp8wd,}
public static String toString(int algorithm){ Q@.9wEAJ
return name[algorithm-1]; @U.}Ei
} c"&!=@
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public static void sort(int[] data, int algorithm) { 4y}a,
impl[algorithm-1].sort(data); jxOVH+?l%
} -Aym+N9
r_<i*l.
public static interface Sort { 3UtXxL&L`
public void sort(int[] data); KZ/^gR\d
} kX .1#%Ex
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public static void swap(int[] data, int i, int j) { Oy`\8*Uy__
int temp = data; <^c0bY1
data = data[j]; Uo)<_nG
data[j] = temp; UlZ)|Ya<M
} 5<8>G?Y
} LK}eU,m=