[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; gBO,
} ckb(+*+l
int i1=l; &ty-aB=F
int i2=mid+1; Lq62
for(int cur=l;cur<=r;cur++){ qg/FI#r
if(i1==mid+1) Dkx}}E:<
data[cur]=temp[i2++]; >,QCKZH
else if(i2>r) lGt:.p{NG
data[cur]=temp[i1++]; N4z[=b>
else if(temp[i1] data[cur]=temp[i1++]; Peo-t*-06
else L]%!YP\<T
data[cur]=temp[i2++]; ts% n tnvI
} &Dt=[yqeG
} m] yUcj{F
C23p1%#1
} Vh1y]#w
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改进后的归并排序: $@vB<(sk
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package org.rut.util.algorithm.support; ~ MsHV%
| TG6-e_
import org.rut.util.algorithm.SortUtil; ?6\N&MTF
mK/E1a)AG3
/** ?lfyC/
* @author treeroot 3d]~e
* @since 2006-2-2 xC9{hXg!
* @version 1.0 lU%oU&P/"S
*/ X-X`Z`o
public class ImprovedMergeSort implements SortUtil.Sort { =1k%T{>
M7T*J>i
private static final int THRESHOLD = 10; }]#z0'Aqsu
en/h`h]h
/* *~YdL7f)J
* (non-Javadoc) /CH]'u^j
* a0+q^*\d\R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?A3u2-
*/ o>nw~_ H\
public void sort(int[] data) { /E2P
int[] temp=new int[data.length]; h-|IZ}F7
mergeSort(data,temp,0,data.length-1); v%c/eAF
} 7M _ mR Vh
~-[!>1!%
private void mergeSort(int[] data, int[] temp, int l, int r) { 5Po:$(
int i, j, k; "G~!J\
int mid = (l + r) / 2; pKpB
if (l == r) cWG%>.`5r
return; mQ<4(qd)
if ((mid - l) >= THRESHOLD) .p.( \5Fo
mergeSort(data, temp, l, mid); )hl7)~S<
else b !y
insertSort(data, l, mid - l + 1); z5oJQPPi
if ((r - mid) > THRESHOLD) \NMqlxp2
mergeSort(data, temp, mid + 1, r); 0%< hj
else t)Cf]]dV
insertSort(data, mid + 1, r - mid); t#@z_Mn\
sp:4b$zX
for (i = l; i <= mid; i++) { k\qFWFR
temp = data; `)5WA{z
} F\&{>&
for (j = 1; j <= r - mid; j++) { \+nV~Pi"A
temp[r - j + 1] = data[j + mid]; &tvtL
} a]7g\rg)
int a = temp[l]; NtM ?Jh
int b = temp[r]; Zj-U^6^L
for (i = l, j = r, k = l; k <= r; k++) { 1x=x,lcL
if (a < b) { 7V8k =
data[k] = temp[i++]; ZgG~xl\My
a = temp; *l4[`7|
} else { -)^vO*b 0
data[k] = temp[j--]; c_S~{a44Ud
b = temp[j]; S5u$I
} kS&>g
} XVqkw@Ia4!
} @8>bp#x/1
7M4J{}9
/** 9PA<g3z
* @param data akNqSZwj
* @param l 6pSTw\/6
* @param i Pzq^x]
*/ 9Q}g Vqn
private void insertSort(int[] data, int start, int len) { I<CrEL<5}~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qPD(D{,f$
} qbD 7\%
} P`{$7ST'Hh
} :H3/+/x
} i0$*):b
/hu>MZ(\
堆排序： .MG83Si
KUYwc@si\
package org.rut.util.algorithm.support; V4NQcy? H
5 ,-8oEUL
import org.rut.util.algorithm.SortUtil; HUD0 @HQI
J<+f7L
/** /{`"X_.o
* @author treeroot &.?E[db"h
* @since 2006-2-2 s5{=lP
* @version 1.0 l*z%Jw
*/ |u?VlRt
public class HeapSort implements SortUtil.Sort{ 1s@QsZ3
xl`AiO `K
/* (non-Javadoc) zsQ|LwQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K$Vu[!l`
*/ *|g[Mn
public void sort(int[] data) { 2[Lv_<i|
MaxHeap h=new MaxHeap(); *l{epum;
h.init(data); Nj3iZD|
for(int i=0;i h.remove(); u%e~a]
System.arraycopy(h.queue,1,data,0,data.length); -W1p=od
} YLQ0UeDN'
ws5Ue4g|
private static class MaxHeap{ z9[TjTH^}T
WYTqQqQk
void init(int[] data){ qE[YZ(/f0&
this.queue=new int[data.length+1]; vs=q<Uw)
for(int i=0;i queue[++size]=data; "lw|EpQk`
fixUp(size); |&JeJ0k>~
} }}$@Tij19[
} hBpa"0F
O#ZZ PJ"
private int size=0; QHZ",1F
o zn&>k
private int[] queue; $Y6\m`
$Q8 &TM}E
public int get() { $ch`.$wx
return queue[1]; hI!BX};+}
} eNK +)<PK(
.>F4s_6l
public void remove() { \ m~?yq8H
SortUtil.swap(queue,1,size--); uStAZ~b\
fixDown(1); Dho6N]86r
} 3._ ep
file://fixdown 6 Ln~b<I
private void fixDown(int k) { T9Q3I
int j; o=($'(1
while ((j = k << 1) <= size) { hA5')te<
if (j < size %26amp;%26amp; queue[j] j++; A\Ib
if (queue[k]>queue[j]) file://不用交换 H,L{N'[Xph
break; +m%%Bz>
SortUtil.swap(queue,j,k); Icrnu}pl_
k = j; N7J?S~x
} 8^ f:-5
} {:uv}4Z
private void fixUp(int k) { )e?&'wa>
while (k > 1) { lUs$I{2_
int j = k >> 1; j0mN4Ny
if (queue[j]>queue[k]) Mz6(M,hkq
break; 6EyPZ{
SortUtil.swap(queue,j,k); ZK^cG'^2|
k = j; 0,t%us/q
} X>o9mW
} PtbaC6"\
hOAZvrfQ4
} ALTOi?
N~O3KG q
} dn- [Gnde
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SortUtil： 2r!ltG3}
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package org.rut.util.algorithm; zW%Em81Wd
%DKFF4k
import org.rut.util.algorithm.support.BubbleSort; JyMk @Y
import org.rut.util.algorithm.support.HeapSort; M/Yr0"%Q<.
import org.rut.util.algorithm.support.ImprovedMergeSort; +`Z1L\gmA
import org.rut.util.algorithm.support.ImprovedQuickSort; NAvR^"I~
import org.rut.util.algorithm.support.InsertSort; *pJGp:{6V?
import org.rut.util.algorithm.support.MergeSort; ^)gyKl:E'
import org.rut.util.algorithm.support.QuickSort; 8mreHa
import org.rut.util.algorithm.support.SelectionSort; o2ggHZe/=@
import org.rut.util.algorithm.support.ShellSort; dyWp'vCQs\
(CxA5u1|l
/** tf~B,?
* @author treeroot o?Hfxp0}
* @since 2006-2-2 +;q\7*
* @version 1.0 ResU5Ce~
*/ ,D+ydr
public class SortUtil { [#Y L_*p
public final static int INSERT = 1; H>EM3cFU
public final static int BUBBLE = 2; TBBnsj6e
public final static int SELECTION = 3; SU~a()"
public final static int SHELL = 4; SO0\d0?u
public final static int QUICK = 5; $~G,T g
public final static int IMPROVED_QUICK = 6; XX~vg>3_
public final static int MERGE = 7; ':wf%_Iw
public final static int IMPROVED_MERGE = 8; c 3QgX4vq
public final static int HEAP = 9; VyxYv-$Y
Y7}>yC/GY
public static void sort(int[] data) { :G1ddb&0+
sort(data, IMPROVED_QUICK); ?J\&yJ_B
} }]vUr}Els
private static String[] name={ :DN!1~ZtW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <xy@%
}; q`<:CfCt
P9cx&Hk9
private static Sort[] impl=new Sort[]{ !uEEuD#
new InsertSort(), BY6#dlDi
new BubbleSort(), o{s2T)2
new SelectionSort(), ,5n!a.T
new ShellSort(), }GB~3 J
new QuickSort(), jfxNV2[
new ImprovedQuickSort(), wX"hUu
new MergeSort(), i?6&4
new ImprovedMergeSort(), G68KoM
new HeapSort() !,Uo{@E)Y
}; M5`v^>
*DF3juf~
public static String toString(int algorithm){ {[oNUzcd
return name[algorithm-1]; ff#7}9_mh
} \Z]+j@9
X8|H5Y:
public static void sort(int[] data, int algorithm) { pr0X7 #_E5
impl[algorithm-1].sort(data); <,]:jgX
} JtL>mH
Pp8S\%z~h
public static interface Sort { Js,!G
public void sort(int[] data); p27Dcwov
} )O1]|r7v
Xsq@E#@S
public static void swap(int[] data, int i, int j) { *'/,
int temp = data; P>7Xbm,VP
data = data[j]; x>#{C,Fi
data[j] = temp; ,"%C.9a
} ^{+ry<rS>
} ;'"'|} xn