[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; ?3[Gh9g`
} p**Sd[|
int i1=l; {KQ-QKxxS
int i2=mid+1; >:o$h2
for(int cur=l;cur<=r;cur++){ |7Dc7p"D
if(i1==mid+1) W&g@o@wa
data[cur]=temp[i2++]; `O+}$wP
else if(i2>r) n["G ry
data[cur]=temp[i1++]; &`@S_YLr
else if(temp[i1] data[cur]=temp[i1++]; {lam],#r
else :.DZ~I
data[cur]=temp[i2++]; >m:;.vVY
} Nxm^jPM0
} xDqJsp=]-
W;Y"J_
} ;$nCQ/ /
a/wg%cWG_
改进后的归并排序: s9#WkDR
PHAM(iC&D
package org.rut.util.algorithm.support; 7%j1=V/
1U)U{i7j
import org.rut.util.algorithm.SortUtil; h(~@ nd{
wH?]kV8Q
/** dDu8n+(8 L
* @author treeroot > J.q3
* @since 2006-2-2 *XUJv&ZN
* @version 1.0 'zJBp 9a%
*/ :9H`O!VF
public class ImprovedMergeSort implements SortUtil.Sort { HNUpgNi
i'cGB5-j
private static final int THRESHOLD = 10; i C)+5L#'
"]SA4Ud^
/* rF^H\U:w
* (non-Javadoc) 2v$\mL
* r+Pfq[z&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R|m!*B~
*/ dDg[ry
public void sort(int[] data) { yac4\%ze
int[] temp=new int[data.length]; :$=]*54`T
mergeSort(data,temp,0,data.length-1); H\%^n<]#
} "g5<jp
1La?x'{2MP
private void mergeSort(int[] data, int[] temp, int l, int r) { xcQD]"
int i, j, k; *Uw"`l
int mid = (l + r) / 2; gB<1;_KW
if (l == r) m2a[E0
return; ZGw6Bd_I
if ((mid - l) >= THRESHOLD) %!\iII
mergeSort(data, temp, l, mid); +@^FUt=tq
else <@S'vcO
insertSort(data, l, mid - l + 1); Leu6kPk
if ((r - mid) > THRESHOLD) oA*88c+{f
mergeSort(data, temp, mid + 1, r); A(D>Zh6o@
else u?4d<%5R!
insertSort(data, mid + 1, r - mid); @?n~v^
r1&eA%eh
for (i = l; i <= mid; i++) { {i<L<Y(3
temp = data; |4C5;"Pc
} IKrojK8-?
for (j = 1; j <= r - mid; j++) { Y1wH_!%b
temp[r - j + 1] = data[j + mid]; %ONU0xtqk
} J4]tT pu"K
int a = temp[l]; !59,<N1Iu
int b = temp[r]; Q<Q?#v7NX
for (i = l, j = r, k = l; k <= r; k++) { V8O-|7H$v
if (a < b) { LVaJyI@/>
data[k] = temp[i++]; v8"Zru
a = temp; z8dBfA<z
} else { N0pA ,&
data[k] = temp[j--]; ;S9 z@`a.
b = temp[j]; XZ=%XB:?
} M?00n< vM
} I]z4}#+cX
} hg7_ZjO
oe*fgk/o9
/** >~l^E!<i-u
* @param data #[&9~za'"m
* @param l (kVxa8 0
* @param i kr\#CW0?
*/ Bdcs}Ga
private void insertSort(int[] data, int start, int len) { I{$TMkh[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I.gF38Mx
} 3>v-,S+
} y&A&d-
} '5lwlF
} (sW$2a
mKLWz1GZ
堆排序： cte Wl/v
12V-EG i
package org.rut.util.algorithm.support; #~o<9O
{t*CSI
import org.rut.util.algorithm.SortUtil; 6o1[fr
{wl7&25
/** Mn 8| Knh
* @author treeroot 9JqT"zj
* @since 2006-2-2 F@KtRUxE
* @version 1.0 Gs>4/
*/ o]eG+i6g]
public class HeapSort implements SortUtil.Sort{ C{G;G@/7
Byh!Snoe
/* (non-Javadoc) dG!)<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E&ReQgBft
*/ -nZDFC8y$
public void sort(int[] data) { _4 YT2k
MaxHeap h=new MaxHeap(); Qoa&]]
h.init(data); dn&484
for(int i=0;i h.remove(); oT!i}TW?o
System.arraycopy(h.queue,1,data,0,data.length); 3fUiYI|&7
} GF36G?iEi
5,BvT>zFY
private static class MaxHeap{ <OrQbrWQa
h%5keiA
void init(int[] data){ 5S ) N&%
this.queue=new int[data.length+1]; zCS&w ~
for(int i=0;i queue[++size]=data; F9>"1
fixUp(size); 4,&f#=Y
} 1*f/Y9 Z
} ?jsgBol
_U o3_us
private int size=0; w^ X@PpP
/vPr^Wv
private int[] queue; ^SbxClUfw!
s)+] pxV0-
public int get() { e35")z~
return queue[1]; %NcBq3
} braI MIQ`
FzF#V=9lP
public void remove() { %v0;1m
SortUtil.swap(queue,1,size--); ";upu
fixDown(1); xg4wtfAbS
} )Wk&c8|y
file://fixdown ?weuq"*a
private void fixDown(int k) { }%c0EY'
int j; &w{z
while ((j = k << 1) <= size) { "$3~):o
if (j < size %26amp;%26amp; queue[j] j++; B}@CtVWFz
if (queue[k]>queue[j]) file://不用交换 Lie= DD
break; `,Fc271`
SortUtil.swap(queue,j,k); Knp}88DR^j
k = j; ~ymSsoD^
} J&L#^f*d
} 55Xfu/hQ
private void fixUp(int k) { Xif>ZL?aXb
while (k > 1) { ([A%>u>h
int j = k >> 1; YpvFv-
if (queue[j]>queue[k]) /PpZ6ne~[
break; Hn]6re
SortUtil.swap(queue,j,k); D7Ds*X`!l
k = j; bRJ]avR
} ^vZu[m
} (hIe!"s*
aN';_tGvK
} } :T}N]
<!-#]6
} ")u)AQ
u&'&E
SortUtil： =j@8/
K,!f7KKo
package org.rut.util.algorithm; [9Hrpo]tU:
%htbEKWR
import org.rut.util.algorithm.support.BubbleSort; Hiih$O+
import org.rut.util.algorithm.support.HeapSort; :eBp`dmn
import org.rut.util.algorithm.support.ImprovedMergeSort; \wp8kSzC
import org.rut.util.algorithm.support.ImprovedQuickSort; }7i}dyQv}
import org.rut.util.algorithm.support.InsertSort; k~]\kv=
import org.rut.util.algorithm.support.MergeSort; w69G6G(
import org.rut.util.algorithm.support.QuickSort; sh%%U
import org.rut.util.algorithm.support.SelectionSort; "R[6Q ^vw
import org.rut.util.algorithm.support.ShellSort; -];Hb'M.!e
h: zi8;(
/** E6xWo)`%5s
* @author treeroot hOe$h,E']
* @since 2006-2-2 qX]ej2
* @version 1.0 _<jccQ
*/ Mvk#$:8e
public class SortUtil { %p};Di[V
public final static int INSERT = 1; 7mYBxE/
public final static int BUBBLE = 2; ;_1>nXh
public final static int SELECTION = 3; mZ.E;X& ,*
public final static int SHELL = 4; t`0(5v
public final static int QUICK = 5; ^ |>)H
public final static int IMPROVED_QUICK = 6; 7T?7KS
public final static int MERGE = 7; `4"&_ltD
public final static int IMPROVED_MERGE = 8; d-"[-+)-
public final static int HEAP = 9; u &{|f
%/wfYRp*
public static void sort(int[] data) { 9z(h8H
sort(data, IMPROVED_QUICK); m A|"
} tHo/Vly6Z
private static String[] name={ (z'!'?v;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ec['k&*7,
}; 3M{b:|3/q
Y0nuwX*{
private static Sort[] impl=new Sort[]{ SFa^$w
new InsertSort(), jqy?Od)
new BubbleSort(), !B&1{
new SelectionSort(), ]GPUL>7
new ShellSort(), Q$2^m(?;
new QuickSort(), |)Sx"B)
new ImprovedQuickSort(), tA9(N>[*
new MergeSort(), 0'Qo eFKG
new ImprovedMergeSort(), 4JjO.H
new HeapSort() qzu%Pp6If
}; }u'O<d~z?
e7gWz~
public static String toString(int algorithm){ b"z9Dpv
return name[algorithm-1]; %suXp,j
} Y&DC5T]
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public static void sort(int[] data, int algorithm) { +luW=j0V
impl[algorithm-1].sort(data); "O{:jfq
} cH$Sk
D\V (r\i
public static interface Sort { N%`Eq@5
public void sort(int[] data); h2edA#bub
} o8S)8_3
UjQi9ELoJ
public static void swap(int[] data, int i, int j) { V %Rz(a+c
int temp = data; pi?U|&.1z
data = data[j]; <S M%M?
data[j] = temp; ;hp?wb
} ppM^&6x^
} '^.}5be&