[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; #{PNdINoU
} cFo-NI2
int i1=l; 1EB`6_>y
int i2=mid+1; s^< oU
for(int cur=l;cur<=r;cur++){ P]^] T}5
if(i1==mid+1) J]e&z5c
data[cur]=temp[i2++]; 2j|Eh
else if(i2>r) ".=EAXVU
data[cur]=temp[i1++]; )Qp?LECrt
else if(temp[i1] data[cur]=temp[i1++]; j$Co-b1
else p `Z7VG
data[cur]=temp[i2++]; 21Opx~T3
} /GNYv*
} Gd 9B
C\K--
} =$J2
H|?`n uiD
改进后的归并排序: (d\bSo$]
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package org.rut.util.algorithm.support; |M&/(0
[sRQd;+
import org.rut.util.algorithm.SortUtil; 6IH^rSUSK
su$juI{
/** w0SgF/"@
* @author treeroot z9ZAY!Zhq]
* @since 2006-2-2 ;E_{Zji_e
* @version 1.0 -0Ek&"=Z^
*/ 6cvm\opH
public class ImprovedMergeSort implements SortUtil.Sort { 4kEFbzwx
otx7J\4
private static final int THRESHOLD = 10; X88ZdM'
)kUw,F=6
/* =lnz5H
* (non-Javadoc) wXnt3)e
* ^W*/!q7H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N:.bnF(
*/ 9yPB)&"EF
public void sort(int[] data) { =T`-h"E~@
int[] temp=new int[data.length]; *bK@A2`
mergeSort(data,temp,0,data.length-1); ,#6\:i
} /zM7G?y
<R$|J|
private void mergeSort(int[] data, int[] temp, int l, int r) { "-oC,;yq
int i, j, k; E'}$'n?:
int mid = (l + r) / 2; .[! ^L
if (l == r) 6=k^gH[g
return; OWzIea@
if ((mid - l) >= THRESHOLD) 82<!b]^1
mergeSort(data, temp, l, mid); Z:{Z&HQC
else Z^'; xn
insertSort(data, l, mid - l + 1); AHb
if ((r - mid) > THRESHOLD) $qqusa}`K
mergeSort(data, temp, mid + 1, r); jEadVM9
else [0Sd +{Q
insertSort(data, mid + 1, r - mid); eAj}/2y"
P!/8
for (i = l; i <= mid; i++) { uQlVzN.?
temp = data; MvCBgLN
} -p }]r
for (j = 1; j <= r - mid; j++) { '1+ Bgf
temp[r - j + 1] = data[j + mid]; (46)v'?
} bPEAG=l"-
int a = temp[l]; Fei$94a
int b = temp[r]; ,>Q,0bVhH0
for (i = l, j = r, k = l; k <= r; k++) { 5sH ee,
if (a < b) { RXDk8)^
data[k] = temp[i++]; w,&RHQB
a = temp; N'StT$(
} else { ,yoT3_%P
data[k] = temp[j--]; /[p4. FL
b = temp[j]; ?w+T_EH
} AMr9rBd
} Fpb1.Iz
} |N*>K a;
sYL+;(#t
/** =J,:j[D(
* @param data {!w]t?h
* @param l l6~eb=u;9g
* @param i p5*Y&aKj
*/ $FoNEr&q
private void insertSort(int[] data, int start, int len) { b#F3,T__`Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >HDK<1>
} ?s//a_nL*
} anbr3L[!
} ZO,]h9?4
} _Cs.%R!r
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堆排序： ;O CYx[|
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package org.rut.util.algorithm.support; cG<?AR?wDT
GZ1>]HB>r^
import org.rut.util.algorithm.SortUtil; ci!c7 ,'c
yC -4wn*
/** C-Mop,w
* @author treeroot xc!"?&\*
* @since 2006-2-2 \<5xf<{
* @version 1.0 !@Ox%vK
*/ T|u)5ww%
public class HeapSort implements SortUtil.Sort{ {0|^F!1z
gP}M\3-O
/* (non-Javadoc) ,T]okN5uI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $I.'7 &h;
*/ FY'f{gD^
public void sort(int[] data) { 7}Gy%SJ`
MaxHeap h=new MaxHeap(); bV"0}|A~K
h.init(data); :KQ<rLd
for(int i=0;i h.remove(); uwbj`lpf
System.arraycopy(h.queue,1,data,0,data.length); 7"gy\_M
} t((0]j^
vm(% u!_P
private static class MaxHeap{ *StJ5c_kg2
U@9n7F
void init(int[] data){ 6 R!0v8
this.queue=new int[data.length+1]; uB%`Bx'OW
for(int i=0;i queue[++size]=data; mGIS[_dcs
fixUp(size); G B15
} j9Lc2'
} n7S[ F3
3V-pLs|
private int size=0; $I_aHhKt
0j*8|{|
private int[] queue; WPPmh~:
6s6[sUf=l&
public int get() { qLR)>$
return queue[1]; JLjx4B\
} sV-9 xh)i
LB>!%Vx
public void remove() { nF)|oA
SortUtil.swap(queue,1,size--); \=.iM?T
fixDown(1); "2 Kh2[K
} _ZJP]5
file://fixdown s)}C&T$Y.
private void fixDown(int k) { $ED<:[3N
int j; 5[0n'uH
while ((j = k << 1) <= size) { wL:3RZB
if (j < size %26amp;%26amp; queue[j] j++; 8^O|Aa$IF:
if (queue[k]>queue[j]) file://不用交换 4YKb~1qkk
break; YYhRdU/g
SortUtil.swap(queue,j,k); GSypdEBj+w
k = j; $Q62 7
} Mq$e5&/
} BsxQW`>^y
private void fixUp(int k) { f;QWlh"9
while (k > 1) { 291v R]
int j = k >> 1; <jxTI%'f59
if (queue[j]>queue[k]) Up8#Nz T
break; NKRNEq!
SortUtil.swap(queue,j,k); LdA&F& pI
k = j; gzeG5p
} :Vv=p*~
} 7dAa~!/(
&QvWT+]c'0
} ^!=+$@<
PQ1\b-I
} .Zo8KwkFY
cd\0
SortUtil： F$d`Umqs;P
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package org.rut.util.algorithm; H1+G:TM
sq*sbdE
import org.rut.util.algorithm.support.BubbleSort; |ONkRxr@!
import org.rut.util.algorithm.support.HeapSort; &ceZu=*
import org.rut.util.algorithm.support.ImprovedMergeSort; Qd$d*mwg:
import org.rut.util.algorithm.support.ImprovedQuickSort; PX+$Us
import org.rut.util.algorithm.support.InsertSort; z1s9[5
import org.rut.util.algorithm.support.MergeSort; i: 1V\q%
import org.rut.util.algorithm.support.QuickSort; Tf` ~=fg%
import org.rut.util.algorithm.support.SelectionSort; o[_{\
import org.rut.util.algorithm.support.ShellSort; ?!b}Ir<1j
68d(6?OgW
/** \!`*F:7]-
* @author treeroot gJ:Z7b
* @since 2006-2-2 jytfGE:
* @version 1.0 Z>'.+OW
*/ wuI+$?
public class SortUtil { e:&5Cvx
public final static int INSERT = 1; j`(o\Fd )
public final static int BUBBLE = 2; Nn+leM
public final static int SELECTION = 3; V*LpO8=
public final static int SHELL = 4; rT <=`9^{
public final static int QUICK = 5; c/b}39X
public final static int IMPROVED_QUICK = 6; R:-^,/1
public final static int MERGE = 7; 0Bb amU
public final static int IMPROVED_MERGE = 8; N_h)L`
public final static int HEAP = 9; 2UA h^i-^
flnoK%wi
public static void sort(int[] data) { klv ]+F&[
sort(data, IMPROVED_QUICK); !'MZeiLP
} /=i^Bgh4
private static String[] name={ >$k_tC'"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xrc0RWXB8
}; 7\<#z|
c)+IX;q-C
private static Sort[] impl=new Sort[]{ 0fwo8NgX
new InsertSort(), (eFHMRMv~
new BubbleSort(), NJwcb=*
new SelectionSort(), MX]<tR`
new ShellSort(), uee2WGD
new QuickSort(), \f05(ld
new ImprovedQuickSort(), o=7 -&F.
new MergeSort(), _=}Efy7
new ImprovedMergeSort(), P'R!" #
new HeapSort() 7C F-?M!
}; ?FxxH*>"
M5CFW >T
public static String toString(int algorithm){ (ybKACx
return name[algorithm-1]; xbSix:R=Z
} 5e6f)[}
skf7Si0z
public static void sort(int[] data, int algorithm) { &dH/V-te
impl[algorithm-1].sort(data); ^F/N-!}q
} +<(N]w*
D`V03}\-
public static interface Sort { k& 2U&
public void sort(int[] data); "o+< \B~
} I5 "Z
9m/v^
public static void swap(int[] data, int i, int j) { r1}YN<+,s
int temp = data; S)T~vK(n
data = data[j]; iG!tRNQ{y
data[j] = temp; Dqs{n?@n
} $_onSYWr
} %@Bl,!BJ,