[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; hi D7tb=g~
} I<(.i!-x
int i1=l; _Z66[T+M
int i2=mid+1; Zjic"E1
for(int cur=l;cur<=r;cur++){ 6SBvn%
if(i1==mid+1) y(3c{y@~X
data[cur]=temp[i2++]; @f5@0A\0
else if(i2>r) ^8oc^LOa~2
data[cur]=temp[i1++]; {[t"O u
else if(temp[i1] data[cur]=temp[i1++]; @Gn?8Ur%
else jo;uRl
data[cur]=temp[i2++]; S|q!? /jqj
} DR yESi
} hi3sOK*r;<
NBqV0>vR
} x !:9c<
:ONuWNY N
改进后的归并排序: :m++ iR
Y!= k
package org.rut.util.algorithm.support; Q%n{*py
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import org.rut.util.algorithm.SortUtil; 7moElh v
j.;
/** y KYP
* @author treeroot KM6N'x^z
* @since 2006-2-2 ?bt`fzX{l
* @version 1.0 Clt5
*/ NlF0\+h
public class ImprovedMergeSort implements SortUtil.Sort { ,5\2C{
#6N+5Yx_[
private static final int THRESHOLD = 10; p]h*6nH>~
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/* GDHK.?GY
* (non-Javadoc) &SjHrOG?
* ~&DB!6*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SLdN.4idK
*/ 2JiAd*WK
public void sort(int[] data) { .0 s[{x
int[] temp=new int[data.length]; v@fe-T&0
mergeSort(data,temp,0,data.length-1); 15xd~V?ai:
} 7b&JX'`Mb
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private void mergeSort(int[] data, int[] temp, int l, int r) { pHen>BA[
int i, j, k; UCn*UX
int mid = (l + r) / 2; 'dIX=/RZ
if (l == r) axK6sIxx
return; n+{HNr
if ((mid - l) >= THRESHOLD) )-+\M_JK5
mergeSort(data, temp, l, mid); c=A(o
else O{k89{
insertSort(data, l, mid - l + 1); eg"=H50
if ((r - mid) > THRESHOLD) 1B)Y;hg6&
mergeSort(data, temp, mid + 1, r); Iv$:`7|crX
else CM%|pB/z
insertSort(data, mid + 1, r - mid); <w0NPrS]
vKNt$]pm=
for (i = l; i <= mid; i++) { =\~E n5
temp = data; r]A"Og_U
} W@I 02n2H
for (j = 1; j <= r - mid; j++) { uiktdZ/f
temp[r - j + 1] = data[j + mid]; #ZG3|#Q=L
} B4]AFRI
int a = temp[l]; tg.|$n
int b = temp[r]; -DTB6}kw
for (i = l, j = r, k = l; k <= r; k++) { &w+;N5}3
if (a < b) { }.0Bl&\UK
data[k] = temp[i++]; %1Bn_
a = temp; *#3*;dya]
} else { 0:Ar|to$m
data[k] = temp[j--]; x|]\1sb"
b = temp[j]; aSc{Ft/O
} KK?Zm_
} 7#QLtU
} uxWFM $
}10\K
/** _p\629`
* @param data "mP&8y9F
* @param l B?+.2
* @param i 'eDJ@4Xm
*/ KX!i\NHz
private void insertSort(int[] data, int start, int len) { AgIazv1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &~RR&MdZ2
} K&*iw`
} Bd{4Ae\_+g
} K*~]fy
} Ab/j(xr=
:z]}ZZ
堆排序： !<&m]K
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package org.rut.util.algorithm.support; (ab{F5
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import org.rut.util.algorithm.SortUtil; @5WgqB
#/|75 4]]
/** \#CM <%
* @author treeroot bp#:UUO%S
* @since 2006-2-2 \i!Son.<
* @version 1.0 f;gZ|a
*/ Ir5WN_EaS
public class HeapSort implements SortUtil.Sort{ d6`OXTD
TI=h_%mO
/* (non-Javadoc) B$^7h!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) btH _HE
*/ ,_D"?o
public void sort(int[] data) { Y>BP?l
MaxHeap h=new MaxHeap(); Po(]rQbE
h.init(data); 9XX>A*
for(int i=0;i h.remove(); mffIf1f
System.arraycopy(h.queue,1,data,0,data.length); JS2nXs1
} HG%Z"d
][d,l\gu+s
private static class MaxHeap{ N L'R\R
B6]<G-
void init(int[] data){ 0)|Q6*E>
this.queue=new int[data.length+1]; Sw8kIC
for(int i=0;i queue[++size]=data; g%xGOA
fixUp(size); a{SBCy
} NOt@M
} Wkzs<y"
y#v"GblM
private int size=0; kS :\Oz\
:?Y$bX}a
private int[] queue; }CDk9Xk
YE}s
public int get() { ifK%6o6
return queue[1]; U47}QDh
} T*~H m
06*rWu9P3
public void remove() { zf[`~g
SortUtil.swap(queue,1,size--); w$|l{VI
fixDown(1); ~D[?$`x:
} Z5(enTy-
file://fixdown ;heHefbvvd
private void fixDown(int k) { [xb]Wf
int j; tMp=-"
while ((j = k << 1) <= size) { }_ mT l@*
if (j < size %26amp;%26amp; queue[j] j++; }(XdB:C8
if (queue[k]>queue[j]) file://不用交换 ($nrqAv4
break; 17.x0gW,
SortUtil.swap(queue,j,k); ]@^coj[
k = j; w}R~C
} %\$;(#h
} H ?M/mGP
private void fixUp(int k) { wJ<Oo@snm
while (k > 1) { 8}e,%{q
int j = k >> 1; }MbH3ufC
if (queue[j]>queue[k]) .lgPFr6X
break; HO)/dZNU
SortUtil.swap(queue,j,k); Wu6<\^A
k = j; US [dkbKo
} mqff]m
} evA/+F,&
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} )6KMHG
CSPKP#,B0[
} y! .J
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SortUtil： >>i@r@
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package org.rut.util.algorithm; :,b iyJt
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import org.rut.util.algorithm.support.BubbleSort; jOpcV|2
import org.rut.util.algorithm.support.HeapSort; .\0isO
import org.rut.util.algorithm.support.ImprovedMergeSort; m!z|h9Ed
import org.rut.util.algorithm.support.ImprovedQuickSort; C;QAT
import org.rut.util.algorithm.support.InsertSort; ,j:|w+l
import org.rut.util.algorithm.support.MergeSort; dz [!-M
import org.rut.util.algorithm.support.QuickSort; @yXfBML?]
import org.rut.util.algorithm.support.SelectionSort; -<v~snq'
import org.rut.util.algorithm.support.ShellSort; R" )bDy?
Uy ?
/** CC\*?BKj"
* @author treeroot KDl_?9E5
* @since 2006-2-2 ~c)~015`
* @version 1.0 m-^8W[r+_
*/ @';B_iQ
public class SortUtil { ZCKka0*
public final static int INSERT = 1; x3qW0K8
public final static int BUBBLE = 2; @/ZF` :
public final static int SELECTION = 3; 2aJS{[
public final static int SHELL = 4; oAWzYu(v
public final static int QUICK = 5; OO?]qZa1
public final static int IMPROVED_QUICK = 6; E0%~!b
public final static int MERGE = 7; `qd+f{Q
public final static int IMPROVED_MERGE = 8; &E xYXI
public final static int HEAP = 9; `wF8k{Pb
ebPgYxVZR
public static void sort(int[] data) { p.+ho~sC,.
sort(data, IMPROVED_QUICK); upj]6f"(
} lds-T
private static String[] name={ HB Iip?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z1^gDjkZ
}; f2,jh}4
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private static Sort[] impl=new Sort[]{ |t; ~:A
new InsertSort(), []a[v%PkG
new BubbleSort(), asY[8r?U
new SelectionSort(), s'kDk2r
new ShellSort(), ^v.,y3
new QuickSort(), Us+pc^A
new ImprovedQuickSort(), +}f9
new MergeSort(), /-bO!RTwf
new ImprovedMergeSort(), $Of0n` e
new HeapSort() pABs!A`N
}; N^Bo .U0\
[s&$l G!
public static String toString(int algorithm){ ox+ 3U
return name[algorithm-1]; gi0W;q
} gY@N~'f;"
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public static void sort(int[] data, int algorithm) { _/wV;h~R
impl[algorithm-1].sort(data); e["2QIOe
} wm+/e#'&
fu90]upz~
public static interface Sort { 4.IU!.Uo
public void sort(int[] data); rk)##)
} ` AY_2>7
M`ip~7"
public static void swap(int[] data, int i, int j) { P;k0W>~k
int temp = data; ;]_o4e6\p
data = data[j]; uL[.ND2._&
data[j] = temp; d6W SL;$
} WJ_IuX51'
} /% kY0 LY