[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; :M.]-+(
} vV>=Uvm
int i1=l; GmZ2a-M
int i2=mid+1; JykNEMB#
for(int cur=l;cur<=r;cur++){ < Q6
if(i1==mid+1) ,qIut|C*
data[cur]=temp[i2++]; eIbz`|%3
else if(i2>r) 8COGe=+o
data[cur]=temp[i1++]; >[<f\BN|
else if(temp[i1] data[cur]=temp[i1++]; o`nJJ:Cxq-
else !!6g<S7)
data[cur]=temp[i2++]; H<
} :`S\p[5
} 1_>w|6;e
`~1#X
} *LQt=~
kQ|phtbI
改进后的归并排序: N`LY$U+N|
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package org.rut.util.algorithm.support; !(sL
G;]zX<2^3
import org.rut.util.algorithm.SortUtil; .K+5k`kd
*rC%nmJwk!
/** rfOrh^
* @author treeroot yJ!,>OQ%'
* @since 2006-2-2 <o@__l.
* @version 1.0 {<Xl57w-Q
*/ ZFtN~Tg
public class ImprovedMergeSort implements SortUtil.Sort { h_B nQZ\
Efu/v<
private static final int THRESHOLD = 10; 3m"9q
/KhY,G'Z
/* k>#-NPU$
* (non-Javadoc) u+ 8wBb5!
* 5yf`3vV|3@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b7HT<$Wg
*/ uf`/-jY
public void sort(int[] data) { wpOM~!9R
int[] temp=new int[data.length]; @"afEMd
mergeSort(data,temp,0,data.length-1); \o5/, C
} B]PG
FB O_B
private void mergeSort(int[] data, int[] temp, int l, int r) { wdRk+
int i, j, k; >viLvDng
int mid = (l + r) / 2; o:@A%*jg
if (l == r) e*39/B0S
return; XXb,*u 3
if ((mid - l) >= THRESHOLD) AZnFOS
mergeSort(data, temp, l, mid); T/q*k)IoR
else &_3o1<
insertSort(data, l, mid - l + 1); p+Fh9N<F9
if ((r - mid) > THRESHOLD) vZIx>
mergeSort(data, temp, mid + 1, r); ;MW=F9U*
else BWzo|isv
insertSort(data, mid + 1, r - mid); GX N:=
$~r=I[5'(
for (i = l; i <= mid; i++) { XW*d\vDun
temp = data; 1(/rg
} I}\`l+
for (j = 1; j <= r - mid; j++) { !~]'&9
temp[r - j + 1] = data[j + mid]; _J0(GuG=~
} ^NrC8,p
int a = temp[l]; F "-GhjK
int b = temp[r]; ]gVW&3ZW
for (i = l, j = r, k = l; k <= r; k++) { i7`/"5I
if (a < b) { z"Wyf6H0T
data[k] = temp[i++]; >"D0vj
a = temp; V""3#Tw
} else { gO bP
data[k] = temp[j--]; 20)8e!jP
b = temp[j]; "Wy!,RH
} K?=g IC:
} 1fV\84m^
} oi%IHX(`
xgWVxX^)
/** D}?JX5.
* @param data wArzMt}[
* @param l OJs s
* @param i n&FRjq9y
*/ _+qtH< F/
private void insertSort(int[] data, int start, int len) { V/J-zH&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A~8-{F 31
} !-8y;,P
} 0~cbB
} HCaEETk5
} B`|H}KU
*4g:V;L
堆排序： @Cl1G
k'K 1zUBj
package org.rut.util.algorithm.support; }Q_ }c9?
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import org.rut.util.algorithm.SortUtil; - S%8
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/** q`@8
* @author treeroot %&iWc_"
* @since 2006-2-2 0V'XE1h
* @version 1.0 !3Q^oR
*/ 5I0j>{U&
public class HeapSort implements SortUtil.Sort{ i",oPz7
(Uk\O`)m
/* (non-Javadoc) vVH*\&H\T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7@ mP;K0
*/ rv%^2h<&
public void sort(int[] data) { ]dnB,
MaxHeap h=new MaxHeap(); I(+%`{Wv
h.init(data); 86~q pN
for(int i=0;i h.remove(); _8OSDW*D5t
System.arraycopy(h.queue,1,data,0,data.length); 7niI65
} -to3I
^j7]> I
private static class MaxHeap{ "=*
U_5\FM
void init(int[] data){ E1>zKENN;
this.queue=new int[data.length+1]; &=laZxe
for(int i=0;i queue[++size]=data; UvVq#<-
fixUp(size); f/g-b]0
} Cx ;n#dn*
} [K`d?&
LS4E.Xdn
private int size=0; .Yxf0y?uv
iIU>:)i
private int[] queue; $%5!CD1)
DZV U!J
public int get() { oqy}?<SQ
return queue[1]; Q5tx\GE
} e`Tssa+
O+o_{t\R
public void remove() { =kn-F T
SortUtil.swap(queue,1,size--); \>
fixDown(1); /@]@Tz@'
} pAc "Wo(Q
file://fixdown p}h9>R
private void fixDown(int k) { rTM0[2N
int j; o`\@Yq$.
while ((j = k << 1) <= size) { (?~*.g!
if (j < size %26amp;%26amp; queue[j] j++; [2nPr^
if (queue[k]>queue[j]) file://不用交换 (J`EC
break; Eo_;Nc
SortUtil.swap(queue,j,k); /w:~!3Aj0+
k = j; oCuKmK8
} <84d Vg
} }G1hB#j
private void fixUp(int k) { XN~r d,MZ%
while (k > 1) { 5w@Q %'o`I
int j = k >> 1; 1fU~&?&-u
if (queue[j]>queue[k]) };]f 3
break; 4GqE%n+ta~
SortUtil.swap(queue,j,k); W>rx:O+
k = j; U,GY']J
} TAZ+2S##7
} Dhp|%_>
kB;!EuL
} of?0 y-LT%
FY<77i
} xi"Ug41)
W&Kjh|[1QZ
SortUtil： 1TL~I-G&n
N1u2=puJY
package org.rut.util.algorithm; ah0
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import org.rut.util.algorithm.support.BubbleSort; y7Y g$)sL
import org.rut.util.algorithm.support.HeapSort; %B-m- =gz
import org.rut.util.algorithm.support.ImprovedMergeSort; 7VAet
import org.rut.util.algorithm.support.ImprovedQuickSort; Zcxj.F(,
import org.rut.util.algorithm.support.InsertSort; KZ/2#`
import org.rut.util.algorithm.support.MergeSort; 1IV R4:a
import org.rut.util.algorithm.support.QuickSort; } OAH/BW
import org.rut.util.algorithm.support.SelectionSort; g+M& _n
import org.rut.util.algorithm.support.ShellSort; ,SSq4
/S&8%fb
/** K!_''Fg
* @author treeroot "\1QJ
* @since 2006-2-2 W1p5F\ wt
* @version 1.0 -O?&+xIK&
*/ J1{ucFa
public class SortUtil { dSIZsapH
public final static int INSERT = 1; ^l9NF
public final static int BUBBLE = 2; '.d]n(/lZd
public final static int SELECTION = 3; %&b70]S(
public final static int SHELL = 4; QLe<).S1B2
public final static int QUICK = 5; :]^FTnO
public final static int IMPROVED_QUICK = 6; (TFo]c
public final static int MERGE = 7; ex-W{k$
public final static int IMPROVED_MERGE = 8; 9>HCt*|_8
public final static int HEAP = 9; /V)4B4
TGu]6NzyZ
public static void sort(int[] data) { <Z8^.t)|
sort(data, IMPROVED_QUICK); ]*JH~.p
} 7.tEi}O&_g
private static String[] name={ gVI2{\a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d]w%zo,yr
}; :pPn)j$
~TfQuIvQB
private static Sort[] impl=new Sort[]{ X3,+aL`
new InsertSort(), j\.\ePmk]
new BubbleSort(), sn?YD'>k
new SelectionSort(), HrS
new ShellSort(), 6$6Qk !%
new QuickSort(), (w{C*iB
new ImprovedQuickSort(), +2S#3m?1
new MergeSort(), )90K^$93"
new ImprovedMergeSort(), R SqO$~
new HeapSort() 'or8CGr^p
}; !`EhVV8u-_
C#4/~+
public static String toString(int algorithm){ caC(KK#<
return name[algorithm-1]; O\KSPy7YQ
} ~7Jj\@68
<P4*7:jX
public static void sort(int[] data, int algorithm) { f!aE/e\
impl[algorithm-1].sort(data); Qv>rww]
} IYk^eG:;
K5SP8<.
public static interface Sort { ?^H1X-;
public void sort(int[] data); Jdp@3mP
} o:"^@3
k=):>}
public static void swap(int[] data, int i, int j) { ?sm@lDZ\
int temp = data; S2*ER
data = data[j]; auT'ATW7i
data[j] = temp; |=W=H6h*
} s;4r)9Uvx
} VPqMbr"L[