[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; nYt\e]3
} H-KwkH`L4
int i1=l; _D,f4.R
int i2=mid+1; mX.3R+t
for(int cur=l;cur<=r;cur++){ VD3MJ8!w
if(i1==mid+1) %7d@+ .
data[cur]=temp[i2++]; 3b\8907
else if(i2>r) mCNf]Yz
data[cur]=temp[i1++]; 1za'u_
else if(temp[i1] data[cur]=temp[i1++]; ,xD*^>!
else B~g05`s
data[cur]=temp[i2++]; iZ6C8HK&&
} s_Oh >y?Aq
} ;Pqyu ?
bNpIC/#0K
} S*m`'
^~<Rzq!
改进后的归并排序: RzJ}CT
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package org.rut.util.algorithm.support; &DQ4=/Z
ka)LK@p6
import org.rut.util.algorithm.SortUtil; eGe[sv"k
6#x)W
/** ~73i^3yf
* @author treeroot <kXV1@>
* @since 2006-2-2 &Pg-|Ql
* @version 1.0 3s_k>cO=
*/ Q}?N4kg
public class ImprovedMergeSort implements SortUtil.Sort { Xm=^\K3
ngY+Ym
private static final int THRESHOLD = 10; &*]{"^
?}3PJVy?
/* m{$tO;c/Q
* (non-Javadoc) %3c|
* H(G^O&ppdB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :{i$2\DH6
*/ bqQO E4;
public void sort(int[] data) { {.3
int[] temp=new int[data.length]; @Gn?8Ur%
mergeSort(data,temp,0,data.length-1); VXc+Wm*W
} KjwY'aYwr:
&e]]F#
private void mergeSort(int[] data, int[] temp, int l, int r) { j #I:6yA3
int i, j, k; <A -(&+
int mid = (l + r) / 2; ;?L!1wklA
if (l == r) H MjeGO.i
return; &Ky u@Tt
if ((mid - l) >= THRESHOLD) Rw/JPC"
mergeSort(data, temp, l, mid); cR=94i=t
else 2}Z4a\YX
insertSort(data, l, mid - l + 1); ',H$zA?i
if ((r - mid) > THRESHOLD) 42J';\)oP
mergeSort(data, temp, mid + 1, r); 1ntkM?
else !V]MLA`
insertSort(data, mid + 1, r - mid); $D/bU lFx
v :+8U[x
for (i = l; i <= mid; i++) { U%^eIXV|
temp = data; I)XOAf$6
} ;]&~D +XH
for (j = 1; j <= r - mid; j++) { bQdSX8: !R
temp[r - j + 1] = data[j + mid]; 5Q$r@&qp
} KM6N'x^z
int a = temp[l]; Y1fy2\<'
int b = temp[r]; @k+%y'Y?
for (i = l, j = r, k = l; k <= r; k++) { q M_/
if (a < b) { ne"?90~
data[k] = temp[i++]; x!C8?K=|
a = temp; M<Wn]}7!
} else { .@i0U
data[k] = temp[j--]; ]~prR?
b = temp[j]; $W/+nmb)@K
} ."IJmv
} aVQSN
} xI@$aTGq
A{aw< P|+
/** (aJP: ^
* @param data :>P4L,Da]
* @param l 8Q^6ibE
* @param i *,W!FxJ
*/ c/<Sa|'
private void insertSort(int[] data, int start, int len) { $"sq4@N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g=FDm*
} 5?5-;H
} wc7mJxJxA
} .0 s[{x
} b46[fa
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堆排序： .# 6n
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package org.rut.util.algorithm.support; 7b&JX'`Mb
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import org.rut.util.algorithm.SortUtil; )D["M$ZA^
TvunjTpaj
/** m"gni #
* @author treeroot UCn*UX
* @since 2006-2-2 h"%|\o+3
* @version 1.0 yV:EK{E
*/ :DdBn.
public class HeapSort implements SortUtil.Sort{ ]6t]m2~\
\~@[QGKN
/* (non-Javadoc) t."g\;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #`jE%ONC
*/ jl.okWuiY
public void sort(int[] data) { .M9d*qp`S
MaxHeap h=new MaxHeap(); }+91s'/c
h.init(data); >=-GD2WK
for(int i=0;i h.remove(); h4CTTe)
System.arraycopy(h.queue,1,data,0,data.length); H96BqNoO
} V~(EVF{h
Gnbfy4Z
private static class MaxHeap{ < /;Q8;0
;wij}y-6
void init(int[] data){ 2;r]gT~
this.queue=new int[data.length+1]; \{c,,th
for(int i=0;i queue[++size]=data; $Wit17j
fixUp(size); r]A"Og_U
} }P<Qz^sr_
} 1~}m.ER
yZYKwKG
private int size=0; PsU9R#HL1
R K"&l!o
private int[] queue; };&HhBc!g
kOs(?=
public int get() { :tRf@bD#
return queue[1]; <^lJr82
} }3v'Cp0L
$ A-+E\vQ@
public void remove() { JDLTOLG
SortUtil.swap(queue,1,size--); &w+;N5}3
fixDown(1); slU
} 51I|0ly
file://fixdown ;mDM5.iF
private void fixDown(int k) { i 8l./Yt/
int j; XB0a dp
while ((j = k << 1) <= size) { &|v{#,ymeb
if (j < size %26amp;%26amp; queue[j] j++; ;% 2wGT
if (queue[k]>queue[j]) file://不用交换 5Z/yhF.{
break; 5]jx5!N
SortUtil.swap(queue,j,k); )O,wRd>5
k = j; CF]i}xpWV
} =%!e(N'p
} ePf+[pV3
private void fixUp(int k) { 7#QLtU
while (k > 1) { OnZF6yfN=3
int j = k >> 1; b,nn&B5@{
if (queue[j]>queue[k]) y Wpi|
break; tbtI1"$
SortUtil.swap(queue,j,k); kmryu=
k = j; >; aCf#q
} i.3cj1
} #@9)h
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} 9]"S:{KSCn
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} v @:~mwy
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SortUtil： XC=%H'p
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package org.rut.util.algorithm; m23+kj)+VY
g3Z:{@m
import org.rut.util.algorithm.support.BubbleSort; l :/&E 6 9
import org.rut.util.algorithm.support.HeapSort; ,Du@2w3Cq
import org.rut.util.algorithm.support.ImprovedMergeSort; N;uUx#z
import org.rut.util.algorithm.support.ImprovedQuickSort; ?a S%
import org.rut.util.algorithm.support.InsertSort; 4t04}vp
import org.rut.util.algorithm.support.MergeSort; `>s7M.|X
import org.rut.util.algorithm.support.QuickSort; M :V2a<!c
import org.rut.util.algorithm.support.SelectionSort; -K"4rz
import org.rut.util.algorithm.support.ShellSort; F8H'^3`b`U
WvujcmOf
/** %m9CdWb=w
* @author treeroot Bs[nV}c>>
* @since 2006-2-2 wuA^'T
* @version 1.0 P''X_1oMC
*/ +noZ<KFW "
public class SortUtil { S=' wJ@?;
public final static int INSERT = 1; Ht#@'x
public final static int BUBBLE = 2; Cezh l
public final static int SELECTION = 3; oK2pM18
public final static int SHELL = 4; &uv0G'"\
public final static int QUICK = 5; U[R@x`
public final static int IMPROVED_QUICK = 6; Z%m-HE:k
public final static int MERGE = 7; -D^L}b
public final static int IMPROVED_MERGE = 8; EFAGP${F
public final static int HEAP = 9; =+Im*mgNn
'n0 .#E_
public static void sort(int[] data) { hrbo:8SL
sort(data, IMPROVED_QUICK); UfO7+_2
} <\" .L
private static String[] name={ (zG.aaz*C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .-0%6] cFD
}; $6T3y8
n 6{2]&sd
private static Sort[] impl=new Sort[]{ MM?`voj~`p
new InsertSort(), Y>BP?l
new BubbleSort(), JWROYED
new SelectionSort(), XF|WCZUnY%
new ShellSort(), Q.+|xwz
new QuickSort(), [$\z'}
new ImprovedQuickSort(), \?DR s
new MergeSort(), k6!4Zz_8
new ImprovedMergeSort(), (DDyK[t+VX
new HeapSort() *XbI#L%>
}; w(j^ccPD
ubYG
public static String toString(int algorithm){ 'xnnLCm.
return name[algorithm-1]; X<]qU3k5
} XX6 T$pA6
:~zv t
public static void sort(int[] data, int algorithm) { /4$4h;_8
impl[algorithm-1].sort(data); M\oTZ@
} Sw8kIC
WA$JI@g
public static interface Sort { ^N{ltgQY
public void sort(int[] data); u=r`t(Z1H
} -kpswP
""{|3XJe
public static void swap(int[] data, int i, int j) { Wkzs<y"
int temp = data; $Z?\>K0i
data = data[j]; #?[.JD51l
data[j] = temp; x0Yse:RE^
} ?m0IehI
} [u M-0t