[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; Kr3];(w{
} 6&!l'[hU
int i1=l; P1d,8~;
int i2=mid+1; LDX*<(
for(int cur=l;cur<=r;cur++){ pzEABA
if(i1==mid+1) el@XK}<dr
data[cur]=temp[i2++]; @W9H9PWv&
else if(i2>r) lCFU1 GHH
data[cur]=temp[i1++]; KRk~w]
else if(temp[i1] data[cur]=temp[i1++]; IRB& j%LA
else lBiovT
data[cur]=temp[i2++]; kEAhTh&g*
} wu^q`!ml
} EzP#Mnz^
zzf7S%1I
} 'Oy5e@G+?
v>I<|
改进后的归并排序: =J.EH|
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package org.rut.util.algorithm.support; Jr?!Mh-
zz3 r<?#5
import org.rut.util.algorithm.SortUtil; Qp69Sk@H{
x(6vh2#vD
/** 3/tJDb5
* @author treeroot GN%<"I.
* @since 2006-2-2 8nu> gA
* @version 1.0 $h]NXC6J
*/ ((9YG
public class ImprovedMergeSort implements SortUtil.Sort { syMm`/*/G-
$B ?? Ip?P
private static final int THRESHOLD = 10; C38XQLC
|UZOAGiBg
/* 5ZUy:
* (non-Javadoc) y*|L:!
* FG _,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P8]ORQ6ZF
*/ 9TW8o}k`
public void sort(int[] data) { E@]sq A
int[] temp=new int[data.length]; mrReast
mergeSort(data,temp,0,data.length-1); w=$'Lt!
} %xh?!s|G(
VK$zq5D
private void mergeSort(int[] data, int[] temp, int l, int r) { _M&{^d
int i, j, k; P09,P
int mid = (l + r) / 2; .SBc5KX
if (l == r) F%y{% C7l
return; F b2p(.
if ((mid - l) >= THRESHOLD) 8iOO1I?+
mergeSort(data, temp, l, mid); J2=*-O:
else [^Q&suy
insertSort(data, l, mid - l + 1); 5d(qtFH1
if ((r - mid) > THRESHOLD) PgTDjEo
mergeSort(data, temp, mid + 1, r); T#Fn:6_=
else ,=x RoXYB}
insertSort(data, mid + 1, r - mid); [Q=4P*G}X
.c|9..Cq=
for (i = l; i <= mid; i++) { a6P!Wzb
temp = data; 2$
} q:Wq8
for (j = 1; j <= r - mid; j++) { }oV3EIH
temp[r - j + 1] = data[j + mid]; WySNL#>a
} a/QIJ*0
int a = temp[l]; mUiOD$rO
int b = temp[r]; (A2U~j?Ry}
for (i = l, j = r, k = l; k <= r; k++) { F],TG&>5
if (a < b) { htQ;m)>J:
data[k] = temp[i++]; .$UTH@;7
a = temp; 0}6QO
} else { aQxe)
data[k] = temp[j--]; 4Sqvhz
b = temp[j]; QaIi.*tic
} Z0{f
} Ls lM$
} PVZEB
:l4^iSf
/** )Kxs@F
* @param data *>G^!e.u
* @param l !B0v<+;P8
* @param i {`tHJ|8
*/ bGhhh/n
private void insertSort(int[] data, int start, int len) { G,+xT}@wu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s z;=mMr/Z
} A&D2T
} L,f^mX0<
} }<E sS
} ?Ozk^#H[
o]dK^[/*
堆排序： |:~("rA+v
[O.LUR;
package org.rut.util.algorithm.support; hgF21Oj9
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import org.rut.util.algorithm.SortUtil; { +i;e]c
L~'^W/N
/** [3Wsc`Q
* @author treeroot $0S.@wUG
* @since 2006-2-2 &z7N\n
* @version 1.0 \Sz4Gr0g3Z
*/ E|KLK4]
public class HeapSort implements SortUtil.Sort{ `HE>%=]b
|:!EHFr
/* (non-Javadoc) u40b? n.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l|4xKBCV]
*/ gEcnn.(S
public void sort(int[] data) { .Y=Z!Q
MaxHeap h=new MaxHeap(); okd ``vG
h.init(data); >FK)p
for(int i=0;i h.remove(); BaNU}@
System.arraycopy(h.queue,1,data,0,data.length); yHa:?u6
} k1~nd=p
oyi7YRvwd
private static class MaxHeap{ C*Y :w
CDwFVR'_Af
void init(int[] data){ j]cXLY
this.queue=new int[data.length+1]; >"PqQO
for(int i=0;i queue[++size]=data; ?=pZmvQg
fixUp(size); 0jip::x
} 3Vb=6-|
} a:(: :m
`\WcF7
private int size=0; wfU&{7yt
dA_V:HP
private int[] queue; b7>,-O
[~Z'xY y
public int get() { 7Y_fF1-wY
return queue[1]; YI? C-,
} =:v><
1OfSq1G>v$
public void remove() { *'AS^2'
SortUtil.swap(queue,1,size--); ZmYSi$B
fixDown(1); /w}B07.
} @?^LxqAWA
file://fixdown 1b %T_a
private void fixDown(int k) { iA^+/Lt
int j; jU3;jm.)
while ((j = k << 1) <= size) { :<WQ;q
if (j < size %26amp;%26amp; queue[j] j++; GP7)m
if (queue[k]>queue[j]) file://不用交换 JPoK\-9NT
break; nDoiG#N0
SortUtil.swap(queue,j,k); JtrDZ;^@
k = j; TJ%]{%F
} #)h ~.D{
} n.)[MC}
private void fixUp(int k) { &xiDG=I#
while (k > 1) { f2w=ln
int j = k >> 1; +=B}R
if (queue[j]>queue[k]) 9,EaN{GM
break; w?$u!X
SortUtil.swap(queue,j,k); SJ WP8+
k = j; ah!O&ECh
} afP&+ 5t@O
} h,WY2Hr
&8_#hne_
} 0@FM^ejA#
Oih2UrF
} uZiY<(X
sG1]A:_<C
SortUtil： cLyuCaH>c
*_).UAP.
package org.rut.util.algorithm; b[[6X
}fZ=T4r
import org.rut.util.algorithm.support.BubbleSort; &fd4IO/O
import org.rut.util.algorithm.support.HeapSort; :@@A
import org.rut.util.algorithm.support.ImprovedMergeSort; D>7_P7]y
import org.rut.util.algorithm.support.ImprovedQuickSort; ?"8A^ ^
import org.rut.util.algorithm.support.InsertSort; }jY[| >z
import org.rut.util.algorithm.support.MergeSort; R$;&O. 5M
import org.rut.util.algorithm.support.QuickSort; k'I_,Z<,
import org.rut.util.algorithm.support.SelectionSort; 4wj|
import org.rut.util.algorithm.support.ShellSort; 0iZ9a/v
ks#Z~6+3
/** C8W`Oly:]
* @author treeroot ~j&:)a'^
* @since 2006-2-2 `)C`_g3Ew
* @version 1.0 =Wy`X0h
*/ wAOVH].
public class SortUtil { 3 cW"VrFy9
public final static int INSERT = 1; C94UF7al
public final static int BUBBLE = 2; 'iISbOM
public final static int SELECTION = 3; B{o\RNU
public final static int SHELL = 4; 4d._Hd='
public final static int QUICK = 5; ~B*\k^t`
public final static int IMPROVED_QUICK = 6; M7<#=pX&
public final static int MERGE = 7; n`T[eb~
public final static int IMPROVED_MERGE = 8; +j: Ld(
public final static int HEAP = 9; T!xy^n]}
:9 iOuu
public static void sort(int[] data) { kq.h\[
sort(data, IMPROVED_QUICK); O9=H [b
} Vv)E41
private static String[] name={ x(zZqOed
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Nl<,rD+KSD
}; !@Vp Bl
Qp{-!*
private static Sort[] impl=new Sort[]{ 3pv1L~ ZI
new InsertSort(), MirBJL
new BubbleSort(), 0#/ 6P&6
new SelectionSort(), 9c %Tv
new ShellSort(), <IDzv'
new QuickSort(), <.(/#=2
new ImprovedQuickSort(), Y9L6W+=T
new MergeSort(), ZpctsCz]
new ImprovedMergeSort(), X|1YGZJ
new HeapSort() 5_C#_=E
}; 7c]Ai
(<JDD]J
public static String toString(int algorithm){ RZh)0S>J
return name[algorithm-1]; {bW3%iU
} "EhO )lR
v!h-h&p O7
public static void sort(int[] data, int algorithm) { fO(S+}
impl[algorithm-1].sort(data); AX RNV
} \\Tp40m+
Rs[]i;
public static interface Sort { g2<S4
public void sort(int[] data); K/+C6Y?
} [gp:nxyfQm
-fgKSJ7
public static void swap(int[] data, int i, int j) { }/0dfes
int temp = data; c!^}!32j)
data = data[j]; Fh$&puF2
data[j] = temp; J\D3fh97-
} VDY1F_Fk
} g9Gy3zk=