[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; #0ETY\}ZD
} eZ|%<Wpu
int i1=l; R%Q@
int i2=mid+1; FN\E*@>X=
for(int cur=l;cur<=r;cur++){ `S6x<J&T\/
if(i1==mid+1) cWi}V
data[cur]=temp[i2++]; jUSmqm'
else if(i2>r) Po ZuMF
data[cur]=temp[i1++]; -u2P ?~
else if(temp[i1] data[cur]=temp[i1++]; =x<ge_Y
else {DU`[:SQZg
data[cur]=temp[i2++]; oASY7k_3
} }emN9Rj
} (iL|Sq&}b
f!s=(H;
} 1+9W+$=h2
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改进后的归并排序: Z8rvWH9
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package org.rut.util.algorithm.support; ~(Q)"s\1I
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import org.rut.util.algorithm.SortUtil; +)y^'Qs
{ jhr<
/** UD8op]>L
* @author treeroot xZ6~Ma2z
* @since 2006-2-2 .Nw=[
* @version 1.0 W7U2MqQ
*/ #=6E\&NC
public class ImprovedMergeSort implements SortUtil.Sort { _(h&7P9
T(t+ iv
private static final int THRESHOLD = 10; A<1hOSCz\
c- }X_)U }
/* c17_2 @N
* (non-Javadoc) _tBTE%sO
* 8ELCs<xI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sC='_h
*/ WN01h=1J_
public void sort(int[] data) { %KmiH ;U
int[] temp=new int[data.length]; u/M+u;
mergeSort(data,temp,0,data.length-1); pL{U `5S
} |962G1.
Vm3v-=6
private void mergeSort(int[] data, int[] temp, int l, int r) { rd9e \%A
int i, j, k; =K6($|'=
int mid = (l + r) / 2; ig/%zA*Bo
if (l == r) .Yf:[`Q6g
return; VxVE
if ((mid - l) >= THRESHOLD) #`o2Z
mergeSort(data, temp, l, mid); qNYN-f~@,
else D|Q#gcWpo
insertSort(data, l, mid - l + 1); BZR:OtR^
if ((r - mid) > THRESHOLD) nPye,"A Ol
mergeSort(data, temp, mid + 1, r); ; mZW{j
else !4^C #{$
insertSort(data, mid + 1, r - mid); MOn
8P1=[i]
for (i = l; i <= mid; i++) { @ Wd9I;hWv
temp = data; ~},=OF-b
} k~jP'aD
for (j = 1; j <= r - mid; j++) { h"_MA_]~
temp[r - j + 1] = data[j + mid]; dHv68*^\'
} BDR.AZ
int a = temp[l]; 8xccp4
int b = temp[r]; 3?1`D/
for (i = l, j = r, k = l; k <= r; k++) { ;i<|9{;
if (a < b) { tE)suU5Y
data[k] = temp[i++]; prTw'~(B
a = temp; FLGk?.x$\
} else { Zo g']=
data[k] = temp[j--]; ;xzUE`uUfJ
b = temp[j]; hRK/T7v
} <})2#sZO!
} w-Da~[J
} !*oi!ysU;O
" N9 <wU
/** 80Gn%1A9
* @param data g7OqX \
* @param l Sgp;@4`M
* @param i px}|Mu7z~
*/ >_|O1H./4
private void insertSort(int[] data, int start, int len) { EUN81F?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $shoasSuI
} :9^;Qv*
} &(xH$htv1
} i 7x7xtq
} L{h%f4Du#
vTlwRG=5
堆排序： |j#C|V%kV
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package org.rut.util.algorithm.support; J"=vE=
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import org.rut.util.algorithm.SortUtil; wtH? [>S;)
(2:/8\_P
/** UN]f"k&
* @author treeroot kw"SwdP5
* @since 2006-2-2 >g+?Oebgw
* @version 1.0 Y#u}tE d
*/ SVO3821
public class HeapSort implements SortUtil.Sort{ 8]M_z:F7F
"a8j"lPJ
/* (non-Javadoc) r=X}%~_8X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (^u1~1E 5
*/ S"OR%
public void sort(int[] data) { rdJ d#S
MaxHeap h=new MaxHeap(); 1n:8s'\
h.init(data); ?<(m 5Al7
for(int i=0;i h.remove(); [^U#Qj)hL
System.arraycopy(h.queue,1,data,0,data.length); 6P5Ih
} ?34 e-
/4` 0?/V
private static class MaxHeap{ YwZ Z{+n
Qzlo'e1
void init(int[] data){ Axe8n1*y
this.queue=new int[data.length+1]; SRrw0&ts
for(int i=0;i queue[++size]=data; S5G6Rj@W
fixUp(size); ^xij{W`|
} nij!1z|M
} D"J!\_o
#ZYVc|sT+
private int size=0; +YqZ((
$CY't'6Hn
private int[] queue; -5I2ga
2Fq<*pxAY
public int get() { BPdfYu,il
return queue[1]; 34d3g
} l,,>& F
pBETA'fY
public void remove() { }RwSp!}C
SortUtil.swap(queue,1,size--); S%yd5<%_
fixDown(1); a^=-Mp
} 3WUTI(
file://fixdown ($}`R xj1@
private void fixDown(int k) { :&:JTa1cv
int j; TW[_Ko86
while ((j = k << 1) <= size) { ?)`L$Vr=
if (j < size %26amp;%26amp; queue[j] j++; 5lm<%
if (queue[k]>queue[j]) file://不用交换 )e a:Q?
break; 49w=XJ
SortUtil.swap(queue,j,k); Ee3hG2d`
k = j; op6CA"w
} 1. rj'
} @ ]/AjjLt
private void fixUp(int k) { %Mk0QKzUo
while (k > 1) { /ew Ukc8,
int j = k >> 1; }w1~K'ck}>
if (queue[j]>queue[k]) QoG cWJ
break; 1;mW,l'`
SortUtil.swap(queue,j,k); 8[J}CdS
k = j; /ig:9R
} Um: Hrjw
} dO4{|(z
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} !kE-_dY6)
;ByOth|9P
} /6h(6 *JI
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SortUtil： Xt#4/>dlR
qt;y2gf=
package org.rut.util.algorithm; Hrzf'a|^
>&p0d0
import org.rut.util.algorithm.support.BubbleSort; t$A%*JBKm
import org.rut.util.algorithm.support.HeapSort; %"af748!+D
import org.rut.util.algorithm.support.ImprovedMergeSort; -$WYj"
import org.rut.util.algorithm.support.ImprovedQuickSort; L30$%G|
import org.rut.util.algorithm.support.InsertSort; e}.^Tiwd]
import org.rut.util.algorithm.support.MergeSort; k31I ysh
import org.rut.util.algorithm.support.QuickSort; 5<ux6,E1{
import org.rut.util.algorithm.support.SelectionSort; j'BMAn ?
import org.rut.util.algorithm.support.ShellSort; ##EYH1P]
hYM@?/(q
/** Xa[?^P
* @author treeroot ;\\@q"n%<
* @since 2006-2-2 ODC8D>ZYl
* @version 1.0 tX"Th'Qi
*/ ,I_^IitN
public class SortUtil { HfvTxaK
public final static int INSERT = 1; Ie4hhW
public final static int BUBBLE = 2; HjGyj/78w
public final static int SELECTION = 3; K"[AxB'F
public final static int SHELL = 4; 9>g,
public final static int QUICK = 5; W"k8KODOY
public final static int IMPROVED_QUICK = 6; Ce")[<:
public final static int MERGE = 7; 6'RrQc=q
public final static int IMPROVED_MERGE = 8; gF5a5T,
public final static int HEAP = 9; Tp9-niW
%B)6$!x
public static void sort(int[] data) { IrWD%/$H
sort(data, IMPROVED_QUICK); S-'fS2
} qq1-DG
private static String[] name={ mBG=jI "xh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BYo/57&:
}; mUz\ra;z
6^c>,.R
private static Sort[] impl=new Sort[]{ ^+m+zd_
new InsertSort(), i6 (a@KRY
new BubbleSort(), ZU9c 5/J
new SelectionSort(), A6pjRxg
new ShellSort(), y:vxE8$Q
new QuickSort(), DANw1_X\
new ImprovedQuickSort(), )h8\u_U
new MergeSort(), =T7A]U]
new ImprovedMergeSort(), yT#{UA^
new HeapSort() 9gEssTkts
}; Myq5b`z
_+^ 2^TW
public static String toString(int algorithm){ S9>0t0
return name[algorithm-1]; acw4B5]
} 3,Q^& 1
#zRbx
public static void sort(int[] data, int algorithm) { sqS=qC
impl[algorithm-1].sort(data); XxaGp95so
} f~_th @K
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public static interface Sort { RNhJ'&SYs
public void sort(int[] data); %T[^D&9$,
} =Odv8yhn
x $zKzfHW
public static void swap(int[] data, int i, int j) { S>0nx ^P
int temp = data; ZZ.m(ATR
data = data[j]; A,)VM9M_l
data[j] = temp; >N?2""
} yx<WSgWZ[
} Qo1eXMW