[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; =xWW+w!r
} dSD}NM
int i1=l; 9v3Nba
int i2=mid+1; n[S*gX0
for(int cur=l;cur<=r;cur++){ 7XC}C+
if(i1==mid+1) pQ`L=#WM
data[cur]=temp[i2++]; >;U%~yy}qc
else if(i2>r) q9z!g/,d/
data[cur]=temp[i1++]; zyn =Xv@p
else if(temp[i1] data[cur]=temp[i1++]; B-p5;h>
else K>JU/(
data[cur]=temp[i2++]; kT=|tQ@
} ' g!_Flk
} NP`ll0s
?B:wV?-`
} eOO*gM=
MP&4}De
改进后的归并排序: U~@B%Msb L
Fm~}A4
package org.rut.util.algorithm.support; mNB ]e5;N
JM9Q]#'t
import org.rut.util.algorithm.SortUtil; -@?>nLQb
bN%MT#X
/** ) G&3V
* @author treeroot UdgI<a~`k6
* @since 2006-2-2 Uy'ZL(2
* @version 1.0 " yl"A4p S
*/ `X03Q[:q"[
public class ImprovedMergeSort implements SortUtil.Sort { aL6 5t\2
ebwoMG,B-
private static final int THRESHOLD = 10; hUvH t+d
%pKs- n`
/* h0QQP
* (non-Javadoc) J3E:r_+
* u+FftgA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aVL%-Il}
*/ j'b4Sbs-f
public void sort(int[] data) { 4KB?g7_*
int[] temp=new int[data.length]; 5.UgJ/
mergeSort(data,temp,0,data.length-1); J, U~.c
} ?Og;W9i
UsKn4Kh
private void mergeSort(int[] data, int[] temp, int l, int r) { bvvx(?!
int i, j, k; ptfADG
int mid = (l + r) / 2; itMc!bUQ
if (l == r) G2k71{jK
return; 2Ps`!Y5
if ((mid - l) >= THRESHOLD) GgZf6~b1J
mergeSort(data, temp, l, mid); \:28z
else dL"i\5#%A
insertSort(data, l, mid - l + 1); "2j~3aWj
if ((r - mid) > THRESHOLD) vv_?ip:t
mergeSort(data, temp, mid + 1, r); *M5C*}dl
else uT2cHzqKB
insertSort(data, mid + 1, r - mid); ;8kfgpM_
@}RyW&1Z
for (i = l; i <= mid; i++) { QCnVZ" !(
temp = data; Y0'^S<ox
} #Jb$AA!z
for (j = 1; j <= r - mid; j++) { Mi-9sW
temp[r - j + 1] = data[j + mid]; +& Qqu`)?F
} @2O\M ,g5
int a = temp[l]; (Gsg+c
int b = temp[r]; h"m7r4f
for (i = l, j = r, k = l; k <= r; k++) { g 0=t9J
if (a < b) { v65r@)\`
data[k] = temp[i++]; K",]_+b
a = temp; b=go"sJ@>(
} else { Um&@ 0C+L
data[k] = temp[j--]; 2l%iXK[
b = temp[j]; (acRYv(
} q@> m~R
} t')I c6.?i
} Stx-(Kfn4
.6(i5K
/** Onyq'
* @param data #r}c<?>Vw
* @param l |Q+v6r(<zZ
* @param i yU`IyaazZ
*/ 3P>@ :
private void insertSort(int[] data, int start, int len) { Dn!V)T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fm{y.URo
} 0$ EJ4
} $nN$"
} }e w?{
} _"TG:RP
QY!A[!6h
堆排序： HX[#tT|m~
jlZNANR3
package org.rut.util.algorithm.support; 7MfvU|D[d/
Jl}7]cVq#
import org.rut.util.algorithm.SortUtil; ~=Sr0+vV
;T(^riAEl
/** b`=rd 4cpU
* @author treeroot M?97F!\U
* @since 2006-2-2 8i"fhN3?Y
* @version 1.0 Rh^$0Q*2
*/ 2|EoP-K7
public class HeapSort implements SortUtil.Sort{ o)DKP>IM#
JJa?"82FXZ
/* (non-Javadoc) i[lH@fJm_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O%{>Zo_<
*/ ],m-,K
public void sort(int[] data) { eSf:[^
MaxHeap h=new MaxHeap(); {^iV<>J
h.init(data); ]5CFL$_Q{
for(int i=0;i h.remove(); ~*WbMA
System.arraycopy(h.queue,1,data,0,data.length); H2p;J#cv@
} q3t@)+l>*
uWQ.h ,
private static class MaxHeap{ ==9Ez
l0V@19Ec
void init(int[] data){ N*;/~bt7P
this.queue=new int[data.length+1]; H(|v
for(int i=0;i queue[++size]=data; oKiu6=
fixUp(size); s,=^V/c
} 7va%-&.&t
} >@o*v*25
T9 1Iz+j
private int size=0; JKGZ0yn
9:>vl0
private int[] queue; CJ>=odK[
O jmz/W
public int get() { G})mw
return queue[1]; XafyI*pOX
} E&AR=yqk
w.jATMJ)F
public void remove() { 'AU!xG6OQ
SortUtil.swap(queue,1,size--); `Hqu2 '`
fixDown(1); NgQl;$
} w6tY6bf}
file://fixdown A_+WY|#M
private void fixDown(int k) { MmB-SR[>P
int j; BN67o]*]<
while ((j = k << 1) <= size) { =v}.sJ V?
if (j < size %26amp;%26amp; queue[j] j++; Lj#6K@u@Z
if (queue[k]>queue[j]) file://不用交换 im`^_zebj
break; ){Y2TWW&0
SortUtil.swap(queue,j,k); {z7{ta
k = j; 6>Fw,$
} 6 9Cxh
} P#C`/%$S
private void fixUp(int k) { *Bj G3Jc5
while (k > 1) { B^Q#@[T
int j = k >> 1; 6lGL.m'Ra
if (queue[j]>queue[k]) (`N/1}vk
break; I <7K^j+5:
SortUtil.swap(queue,j,k); jdzV&
k = j; }\F>z
} 6)8']f
} @QofsWC
:>;#/<3{
} ;-F#a+2]!
i.]}ooI
} gDrqs>8
4#T'Fy].
SortUtil： &*}S 0
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package org.rut.util.algorithm; {XAKf_Cg
h0`)=
import org.rut.util.algorithm.support.BubbleSort; "T'!cy
import org.rut.util.algorithm.support.HeapSort; ?{n#j,v!
import org.rut.util.algorithm.support.ImprovedMergeSort; sC$X7h(Q+
import org.rut.util.algorithm.support.ImprovedQuickSort; N=kACEo
import org.rut.util.algorithm.support.InsertSort; ^s-3U
import org.rut.util.algorithm.support.MergeSort; kF5}S8B
import org.rut.util.algorithm.support.QuickSort; xiiZ'U
import org.rut.util.algorithm.support.SelectionSort; p ,!`8c6
import org.rut.util.algorithm.support.ShellSort; !dGgLU_
9D bp`%j
/** 6\`,blkX
* @author treeroot c:bB4ch}
* @since 2006-2-2 (?Yz#Yf
* @version 1.0 LTF%bAQ,
*/ al2v1.Y}
public class SortUtil { W{`;][
public final static int INSERT = 1; rtI4W
public final static int BUBBLE = 2; F-nt7l
public final static int SELECTION = 3; {"<Q?yA2y
public final static int SHELL = 4; CNwhH)*
public final static int QUICK = 5; 5segzaI
public final static int IMPROVED_QUICK = 6; )gR&Ms4
public final static int MERGE = 7; $KiA~l
public final static int IMPROVED_MERGE = 8; biJU r^n
public final static int HEAP = 9; `>V.}K^4
ZE9*i}r
public static void sort(int[] data) { /swTn1<Y
sort(data, IMPROVED_QUICK); P _ SJK
} myYe~f4=HQ
private static String[] name={ 1+^c3Dd`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %l,Xt"nS#
}; !#r]f9QP
BdceINI
private static Sort[] impl=new Sort[]{ UY==1\
new InsertSort(), YC$pT
new BubbleSort(), 6O"0?wG+
new SelectionSort(), rScmUt
new ShellSort(), {kC]x2 U
new QuickSort(), j>6{PDaT
new ImprovedQuickSort(), H;^6%HV1
new MergeSort(), mr*zl*
new ImprovedMergeSort(), \+,jM6l}-
new HeapSort() BKIt,7j
}; n4:WM+f4
2}`OjVS
public static String toString(int algorithm){ rnW i<Se
return name[algorithm-1]; L3/ua
} j8PK\j[
x&;SLEM
public static void sort(int[] data, int algorithm) { Awj`6GeJ
impl[algorithm-1].sort(data); f_ ::?
} -Ju!2by
xGA%/dy,;
public static interface Sort { `pKQ|zGw
public void sort(int[] data); 29E^]IL?
} CV` I.
{d/k0H
public static void swap(int[] data, int i, int j) { | o?@Eh
int temp = data; /5o~$S
data = data[j]; "];19]x6q
data[j] = temp; ie_wJ=s
} |HL1.;1
} IE|$>q0Z