[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; sKDL=c;?j
} JO\KTWtjO
int i1=l; 5} 1qo7;
int i2=mid+1; 5>~q4t)6z}
for(int cur=l;cur<=r;cur++){ >;k~B
if(i1==mid+1) }K9Ji]tOK:
data[cur]=temp[i2++]; BDPF>lPf<
else if(i2>r) vPx#TXY=b}
data[cur]=temp[i1++]; ;f2<vp;U
else if(temp[i1] data[cur]=temp[i1++]; ` NWmwmWB"
else H:X(><J
data[cur]=temp[i2++]; e)]DFP[n
} /UiB1-*b
} iI!g1
YG>6;g)Zm
} 0<]]q[pr
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改进后的归并排序: ]0;,M
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package org.rut.util.algorithm.support; eLk:">kj
nLBi}T
import org.rut.util.algorithm.SortUtil; 1Ewg_/R
~}s0~j~
/** B{lL}"++0
* @author treeroot (t"rzH
* @since 2006-2-2 5z"[{#/
* @version 1.0 Ms=11C
*/ -A1:S'aN-
public class ImprovedMergeSort implements SortUtil.Sort { o.>Yj)U
=<z~OE'lV
private static final int THRESHOLD = 10; BHZSc(-o
qnf\K}
/* bs_rw+
* (non-Javadoc) (.~'\@
* =B ts
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j9 &0/ ~/
*/ :c0 |w
public void sort(int[] data) { Kg#s<#h
int[] temp=new int[data.length]; :w:ql/?X
mergeSort(data,temp,0,data.length-1); [3io6XG x@
} V-zF'KI[
r }Nq"s<
private void mergeSort(int[] data, int[] temp, int l, int r) { >I9|N}I
int i, j, k; 2Q[q)u
int mid = (l + r) / 2; `}*jjnr"
if (l == r) vjYG>YhV
return; 8rSu,&<
if ((mid - l) >= THRESHOLD) d4A3DTW
mergeSort(data, temp, l, mid); luV_
else FSS~E [(DL
insertSort(data, l, mid - l + 1); J*]JH{
if ((r - mid) > THRESHOLD) ^uIKwql
mergeSort(data, temp, mid + 1, r); 73(5.'F
else %)j^>W5
insertSort(data, mid + 1, r - mid); dhI+_z
mbZg2TTy
for (i = l; i <= mid; i++) { q@iZo,Yk
temp = data; Vvk\$'
} j'&a)-Wx_
for (j = 1; j <= r - mid; j++) { bv'Z~@<c
temp[r - j + 1] = data[j + mid]; sys;Rz2
} Z n]e2
int a = temp[l]; f'B#h;`
int b = temp[r]; WvHy}1W
for (i = l, j = r, k = l; k <= r; k++) { a8r+G]Z
if (a < b) { StM)lVeF
data[k] = temp[i++]; rYk
a = temp; uCGn9]
} else { }#9 |au`
data[k] = temp[j--]; o1@. <Q+}
b = temp[j]; > V%3w7
} vX"jL
} N;XJMk_ H
} |NaEXzo|qY
+/2:
/** Fs1ms)
* @param data Gm'Ch}E
* @param l 9Q*zf@w
* @param i /R)(u@jk
*/ wvg>SfV,e
private void insertSort(int[] data, int start, int len) { LQ=Fck~[r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i+Btz-
} !FJ_\UST0
} "Yf?33UNZ
} aW#_"Y}v'
} h*?/[XY
t^@4n&Dg
堆排序： Y%]&h#F
Cr%6c3aQ
package org.rut.util.algorithm.support; Nyo,6 AA
&1,qC,:!
import org.rut.util.algorithm.SortUtil; AJ-~F>gn
qf6}\0
/** SZ"^>}zl=
* @author treeroot Q5qQ%cu
* @since 2006-2-2 Y([vma>U]
* @version 1.0 sBD\;\I
*/ pM7xnL4
public class HeapSort implements SortUtil.Sort{ jRzQ`*KC#
E| =~rIKN
/* (non-Javadoc) OL)M`eVQ'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p(Bn!
*/ |p{FSS
public void sort(int[] data) { \.jT"Z~
MaxHeap h=new MaxHeap(); &li&P5!i
h.init(data); ,c'a+NQ_t
for(int i=0;i h.remove(); EL-1o02-
System.arraycopy(h.queue,1,data,0,data.length); IEJp!P,E
} IOi6' 1l
B|+tK
private static class MaxHeap{ S)d_A
rJl'+Ae9N|
void init(int[] data){ 2d Px s:8&
this.queue=new int[data.length+1]; "Crm\UI6
for(int i=0;i queue[++size]=data; dLI`\e<r&[
fixUp(size); ^YG.eT6iG
} Ws(#ThA
} 3Q"4-pd
S[W|=(f9
private int size=0; 1ssEJ;#s
r)SwV!b
private int[] queue; /R44x\nhr
L(!mm
public int get() { ^atBf![
return queue[1]; 27Ve$Q8]v
} #.n%$r
<xeo9'k6&
public void remove() { y*5bF0
SortUtil.swap(queue,1,size--); Gd5J<K
fixDown(1); )#l,RJ(
} zn|/h,.
file://fixdown H:HJHd"W
private void fixDown(int k) { L'Fy\K\
int j; A_WtmG_9
while ((j = k << 1) <= size) { Kq0!.455
if (j < size %26amp;%26amp; queue[j] j++; c0%%X!!$
if (queue[k]>queue[j]) file://不用交换 W!BIz&SY:-
break; JH0L^p
SortUtil.swap(queue,j,k); W}U-u{Z
k = j; W+0VrH 0F
} e-#!3j!'
} 7}<057Xn'
private void fixUp(int k) { \kGi5G]
while (k > 1) { @n##.th
int j = k >> 1; /hMD Me
if (queue[j]>queue[k]) 'M#'BQQ5
break; |VL(#U
SortUtil.swap(queue,j,k); IL]VY1'#
k = j; &zYo
} ,??%["R
} Fhn=}7|4q
0-W{(xy@4
} IJAWG
e/;chMCq
} ^3L6mOoA
^^I3%6UY
SortUtil： /8SQmh$+e
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package org.rut.util.algorithm; 1wa zJj=v
B|Rnh;B-
import org.rut.util.algorithm.support.BubbleSort; yw%5W=<
import org.rut.util.algorithm.support.HeapSort; }bVWV0Aeim
import org.rut.util.algorithm.support.ImprovedMergeSort; 9s-op:5
import org.rut.util.algorithm.support.ImprovedQuickSort; Uaho.(_GP
import org.rut.util.algorithm.support.InsertSort; ='0f#>0Q
import org.rut.util.algorithm.support.MergeSort; #D$vH
import org.rut.util.algorithm.support.QuickSort; *|RQ )
import org.rut.util.algorithm.support.SelectionSort; siHS@S
import org.rut.util.algorithm.support.ShellSort; YolO-5
-m:i~^ u
/** d4#Q<!r
* @author treeroot I9`R LSn
* @since 2006-2-2 Oop;Y^gG}
* @version 1.0 KGclo-,
*/ Uk02VuS
public class SortUtil { jy] hP?QG
public final static int INSERT = 1; Dm j^aFB0|
public final static int BUBBLE = 2; F-)lRGw
public final static int SELECTION = 3; <}3c%Q1
public final static int SHELL = 4; [9WtoA,kx
public final static int QUICK = 5; _|S>,D'
public final static int IMPROVED_QUICK = 6; _G!lQ)1
public final static int MERGE = 7; [y73 xF
public final static int IMPROVED_MERGE = 8; onM ~*E
public final static int HEAP = 9; Ne<"o]_M
p0xd c3
public static void sort(int[] data) { tj ,*-).4%
sort(data, IMPROVED_QUICK); Eg"DiI)7
} aPq9^S*
private static String[] name={ N;A#3Ter
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \vB-0w
}; Ey77]\
g< cR/
private static Sort[] impl=new Sort[]{ 3:i4DBp,i
new InsertSort(), bUC-}
new BubbleSort(), fn zj@_{|
new SelectionSort(), @xJ qG"
new ShellSort(), 9lA@ K[
new QuickSort(), PnsQ[}.
new ImprovedQuickSort(), oQC*d}_E}
new MergeSort(), ,uD F#xjl,
new ImprovedMergeSort(), 0KyujU?sF
new HeapSort() A/N$
}; I)E+
/(w:XTO<
public static String toString(int algorithm){ 2sjP":
return name[algorithm-1]; Z1FO.[FV
} zi23k=
AF1";duA
public static void sort(int[] data, int algorithm) { <R7*00
impl[algorithm-1].sort(data); `)F lb|da
} eB78z@
@.gT&Hq
public static interface Sort { sQ/7Mc
public void sort(int[] data); z= -u89]
} mf'N4y%
t@1e9uR
public static void swap(int[] data, int i, int j) { BciwS_Qx
int temp = data; x\XgQQ]-
data = data[j]; :<=!v5 SK
data[j] = temp; 0K'lr;
} <JHU*Z
} V; 1r