[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; )4GCL(&
} QcdAg%"yy
int i1=l; Jd|E 4h~(
int i2=mid+1; <5|:QLqy
for(int cur=l;cur<=r;cur++){ >/-Bg:
if(i1==mid+1) ,F|49i.K
data[cur]=temp[i2++]; %:-2P
else if(i2>r) g`=Z%{z%
data[cur]=temp[i1++]; M"OCwBTU
else if(temp[i1] data[cur]=temp[i1++]; ~NK|q5(I
else 8(:O5#
data[cur]=temp[i2++]; z_$F)*PL
} .k5&C/jv
} S]c&T`jx
Fy^8]u*Fu
} f F9=zrW
Is ( Ji
改进后的归并排序: ^"J)^3j<
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package org.rut.util.algorithm.support; ?[X^'zz}
w[;5]z
import org.rut.util.algorithm.SortUtil; 5.U|CL
5W_Rg:J{P
/** pc](
* @author treeroot `jGG^w3
* @since 2006-2-2 l4E0/F
* @version 1.0 b5%T)hn=
*/ Z~g7^,-t
public class ImprovedMergeSort implements SortUtil.Sort { a7fn{VU8
_$gP-J
private static final int THRESHOLD = 10; S1*xM
@$|bMH*1:
/* [jKhC<t}
* (non-Javadoc) t "[2^2G
* F*,RDM'M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @_"Z]Y ,D0
*/ $?|$uMIafp
public void sort(int[] data) { ]M&KUgz
int[] temp=new int[data.length]; >yt8gw0J
mergeSort(data,temp,0,data.length-1); =?1B|hdo
} ";w"dfC^
|#O>DdKHT
private void mergeSort(int[] data, int[] temp, int l, int r) { ALp|fZ\vp
int i, j, k; )#025>$z
int mid = (l + r) / 2; U{&gV~
if (l == r) TDW\n
return; v6'k`HnK
if ((mid - l) >= THRESHOLD) @VKN6yHH
mergeSort(data, temp, l, mid); B d?{ldg
else 3TnrPO1E
insertSort(data, l, mid - l + 1); o;{BI Q1
if ((r - mid) > THRESHOLD) zHQSx7Ow 5
mergeSort(data, temp, mid + 1, r); 6tBe,'*
else /baSAoh/e
insertSort(data, mid + 1, r - mid); 67P@YL
/G!M\teeF
for (i = l; i <= mid; i++) { 39Tlt~Psz
temp = data; 9h0Y">}`b
} Au{J/G<W@
for (j = 1; j <= r - mid; j++) { c[4I> "w
temp[r - j + 1] = data[j + mid]; E Ks4N4k
} %2`.*]L
int a = temp[l]; D~t
int b = temp[r]; *~jTE;J
for (i = l, j = r, k = l; k <= r; k++) { ,uCgC4EP
if (a < b) { O g!SFg*
data[k] = temp[i++]; M_f.e!?
a = temp; @@#h-k%k-
} else { 6{?B`gm7g
data[k] = temp[j--]; ]R]%c*tA
b = temp[j]; oYrg;]H
} ze#r/j;sw
} e#|YROHf
} ECvTmU'=
uwWKsZ4:ij
/** \ H!Klp
* @param data `:YCOF
* @param l KWiP`h8
* @param i G Y+li{
*/ {1J4Q[N9m
private void insertSort(int[] data, int start, int len) { #b$qtp!,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5/m}v'S%
} $VUX?ii$7=
} %. W56
} e4Q2$Q@b
} _'Hw`0}s
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堆排序： s73'h
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package org.rut.util.algorithm.support; FZ=xy[q]~
=nE^zY2m%
import org.rut.util.algorithm.SortUtil; e3]v *<bj
IOOK[g.?h
/** T8>aU
* @author treeroot rE9Nt9}
* @since 2006-2-2 S0!w]Ku
* @version 1.0 \JIyJ8FleC
*/ U'0e<IcY
public class HeapSort implements SortUtil.Sort{ ]q3.^F
$9?<mP2-*
/* (non-Javadoc) i&\cDQ 3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nh"U~zlh
*/ g0:{{w
public void sort(int[] data) { zx;~sUR;
MaxHeap h=new MaxHeap(); U,7}VdO
h.init(data); jUd)|v+t
for(int i=0;i h.remove(); <^Jdl.G
System.arraycopy(h.queue,1,data,0,data.length); /G= ?E]^
} "WzD+<oL
n|eM}ymF+
private static class MaxHeap{ Pd;Gc@'~
0@kL<\u
void init(int[] data){ CX#d9 8\b
this.queue=new int[data.length+1]; 7(C:ty9
for(int i=0;i queue[++size]=data; #X qnH
fixUp(size); HlraOp+
} <,,X\>B
} FPukV^
F $1f8U8
private int size=0; kxt/I<cs
c]R27r E
private int[] queue; N}KL'
t_jnp $1m
public int get() { Ar'k6NX
return queue[1]; >1RL5_US
} '>[Ut@lT;
arN=OB
public void remove() { % !Ih=DZ
SortUtil.swap(queue,1,size--); w[OUGn'
fixDown(1); KRb'kW
} sq;3qbz
file://fixdown Y]bS=*q
private void fixDown(int k) { >Ft)v
int j; QM@zy
while ((j = k << 1) <= size) { 2BV]@]qB
if (j < size %26amp;%26amp; queue[j] j++; ry0YS\W
if (queue[k]>queue[j]) file://不用交换 x.Tulo0/
break; ]D[\l$(
SortUtil.swap(queue,j,k); T}59m;I
k = j; "w3%BbIx
} ]EqwDw4
} r0*Y~ KHw
private void fixUp(int k) { ;2[),k
while (k > 1) { o2!wz8
int j = k >> 1; 6o4Y]C2W{1
if (queue[j]>queue[k]) BJKv9x1jK
break; `\J,%J
SortUtil.swap(queue,j,k); P~s u]+
k = j; D.gD4g_O/
} {%c&T S@s
} 3!vnSX(iv
slAR<8
} ]EdZ,`B4
B_ bZa
} &cwN&XBY
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SortUtil： wlgR =l
DhXV=Qw
package org.rut.util.algorithm; UjS+Ddp
/[E2+g
import org.rut.util.algorithm.support.BubbleSort; b>Ea_3T/
import org.rut.util.algorithm.support.HeapSort; OAf}\
import org.rut.util.algorithm.support.ImprovedMergeSort; IZs&7
import org.rut.util.algorithm.support.ImprovedQuickSort; J vq)%t8q>
import org.rut.util.algorithm.support.InsertSort; q7<=1r+
import org.rut.util.algorithm.support.MergeSort; JJ9R, 8n6
import org.rut.util.algorithm.support.QuickSort; opTH6a
import org.rut.util.algorithm.support.SelectionSort; WjOP2CVv|
import org.rut.util.algorithm.support.ShellSort; $$i Gs6az
#n]K$k>
/** vIf-TQw
* @author treeroot !,]2.:{0z
* @since 2006-2-2 c#TV2@
* @version 1.0 U9jdb9 |
*/ {.ypZ8JU
public class SortUtil { (__$YQ-
public final static int INSERT = 1; {vdY(
public final static int BUBBLE = 2; \&47u1B
public final static int SELECTION = 3; RAWzQE}
public final static int SHELL = 4; Q]e]\J
public final static int QUICK = 5; I51I(QF=
public final static int IMPROVED_QUICK = 6; LXaq
public final static int MERGE = 7; >>|47ps3
public final static int IMPROVED_MERGE = 8; kW0ctGFYlf
public final static int HEAP = 9; YQb503W"d~
rdCs
public static void sort(int[] data) { 3aU5rbi|B
sort(data, IMPROVED_QUICK); t~<HFY*w
} ) ]DqK<-
private static String[] name={ 0s79rJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m^ Epw4eg
}; H3 -?cy
=cO5Nt
private static Sort[] impl=new Sort[]{ IwRP,MQ~
new InsertSort(), +s^nT{B@\
new BubbleSort(), ,4Q8r:_ u
new SelectionSort(), z?pi/`y8>
new ShellSort(), 8 Vf#t!t
new QuickSort(), i[I&m]N
new ImprovedQuickSort(), Ve${g`7&
new MergeSort(), a,(nf1@5
new ImprovedMergeSort(), 2qojU%fiH
new HeapSort() #%w+PL:*O
}; )O5@R
:{4C2qK>
public static String toString(int algorithm){ ]>1`Fa6_
return name[algorithm-1]; 4>OS2b`.;
} /:ZwGyT;
(:F]@vT
public static void sort(int[] data, int algorithm) { +r7hc;+G
impl[algorithm-1].sort(data); ]=9 d'WL
} %a|Qw(4\
oUO3,2bn
public static interface Sort { J%n#uUs
public void sort(int[] data); l fFRqZ
} @,7r<6E
EV-sEl8ki
public static void swap(int[] data, int i, int j) { _>BYUPY
int temp = data; bDudETl
data = data[j]; v(GnG
data[j] = temp; QO0@Ax\b
} <-fvYer
} BMI`YGjY1