[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; @pkozE-
} &(.ZHF
int i1=l; Ra*9d]N@
int i2=mid+1; BLJ-'8G
for(int cur=l;cur<=r;cur++){ Hh@mIusj
if(i1==mid+1) Y66 vJ<lM
data[cur]=temp[i2++]; HRw,D=
else if(i2>r) 3]VTQl{P
data[cur]=temp[i1++]; t1~*q)!Mo
else if(temp[i1] data[cur]=temp[i1++]; #-VKk
else w|5}V6WD
data[cur]=temp[i2++]; Z=H fOC
} i([A8C_A
} mA>Pr<aV:
Sdt @"6
} ,vhR99g{
gVl#pVO`N
改进后的归并排序: h'jnc.
yWK[@;S]%
package org.rut.util.algorithm.support; ?4~lA L1
/V*eAn8>
import org.rut.util.algorithm.SortUtil; tIvtiN6[|l
7PvuKAv?k
/** [wOO)FjT
* @author treeroot 54)}^ftY^
* @since 2006-2-2 g{a0,B/j
* @version 1.0 uIPR*9~6o
*/ $i`YtV
public class ImprovedMergeSort implements SortUtil.Sort { kdo)y(fn@
FVpe*]
private static final int THRESHOLD = 10; 3sw1y
~|!lC}!IKL
/* eX$Biv1N
* (non-Javadoc) ,#m\W8j
* kR_[p._
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PRUGUHY
*/ C eg6o&^
public void sort(int[] data) { u@|yw)
int[] temp=new int[data.length]; #\M<6n{
mergeSort(data,temp,0,data.length-1); EagI)W!s[
} Fq3;7Cq=hD
~.Gk:M
private void mergeSort(int[] data, int[] temp, int l, int r) { f[ywC$en
int i, j, k; 1GNAx\(
int mid = (l + r) / 2; SVHtv0Nx
if (l == r) a&<<X:$Hy
return; s6 ^JgdW
if ((mid - l) >= THRESHOLD) &,)tD62s
mergeSort(data, temp, l, mid); r#j*vO '
else &vn9l#\(
insertSort(data, l, mid - l + 1); cP Y^Bf5)
if ((r - mid) > THRESHOLD) SW=p5@Hy{
mergeSort(data, temp, mid + 1, r); z(=:J_N
else =wQ=`
insertSort(data, mid + 1, r - mid); %SE g(<
xphqgOc12,
for (i = l; i <= mid; i++) { qnlj~]NV
temp = data; npF[J x[
} f0uiNy(r$
for (j = 1; j <= r - mid; j++) { {J]|mxo
temp[r - j + 1] = data[j + mid]; 8,=$>@u
} o]j*
int a = temp[l]; _Dv^~e1c
int b = temp[r]; ppYz~ {"r
for (i = l, j = r, k = l; k <= r; k++) { r3-3*_
if (a < b) { i>~?XVU
data[k] = temp[i++]; D'&LwU,o
a = temp; :z:Blp>nK/
} else { Mc6y'w
data[k] = temp[j--]; 96BMJE'
b = temp[j]; K$Ph$P@
} ~,:f,FkSQ
} hG67%T'}A
} Uwp +w
QJ/SP
/** #.@=xhK/
* @param data o6r4tpiR5
* @param l `#]\Wnp~y
* @param i fS~.K9
*/ `4=b|N+b"
private void insertSort(int[] data, int start, int len) { $1v5*E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0v_8YsZ!`$
} W< n`[
} 9NT;^K^I
} i_MI!o
} \x!>5Z Y
LWI~m2
堆排序： @FTi*$Ix
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package org.rut.util.algorithm.support; dd$N4&
V~=)#3]`[
import org.rut.util.algorithm.SortUtil; y AWDk0bx
--9mTqx
/** B'Wky>5)
* @author treeroot w.8~A,5}Dh
* @since 2006-2-2 'GFzI:Xr
* @version 1.0 ]VvJ1Xn0
*/ "jHN#}
public class HeapSort implements SortUtil.Sort{ ^Toi_
R+K[/AA
/* (non-Javadoc) #RF=a7&F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Trrh`@R
*/ #jX>FXo
public void sort(int[] data) { @I&"P:E0F;
MaxHeap h=new MaxHeap(); =Wf@'~K0k"
h.init(data); `T70FsSJ
for(int i=0;i h.remove(); Q-F9oZ*0
System.arraycopy(h.queue,1,data,0,data.length); "7HB3?2>W
} G DV-wPX
L9T u>4
private static class MaxHeap{ :m d3@r']
Pio^5jhB6
void init(int[] data){ z+*Z<c5d
this.queue=new int[data.length+1]; -?W@-*J
for(int i=0;i queue[++size]=data; |6>_L6t
fixUp(size); aM~fRra7
} f2wW2]Fg
} W%1S:2+Kl
}>0 Kc=
private int size=0; Db=gS=Qm
gnXjd}
private int[] queue; V5B-S.i@
{Fi@|'
public int get() { :j~5(K"
return queue[1]; @m V C
} {rT`*P~
u3vmC:bV
public void remove() { q3F5\6aN
SortUtil.swap(queue,1,size--); d<'xpdxc
fixDown(1); |Z ,G
} Q7|13^|C
file://fixdown !qlGt)G3
private void fixDown(int k) { mB{{o}'<u
int j; ??Zmj:8E'
while ((j = k << 1) <= size) { Z+"&{g
if (j < size %26amp;%26amp; queue[j] j++; ^>Y%L(>
if (queue[k]>queue[j]) file://不用交换 F"xO0t
break; PoJ$%_a}
SortUtil.swap(queue,j,k); Jdn*?hc+
k = j; d 4]%Wdvf
} g5Rm!T+@I<
} (fa?ftK
private void fixUp(int k) { s3{s.55{m
while (k > 1) { &._!)al
int j = k >> 1; a[n$qPm}
if (queue[j]>queue[k]) `?JgHk
break; ~7pjk
SortUtil.swap(queue,j,k); +ZKhmb!
k = j; |Vi&f5p,@
} U*Qq5=dqD
} 'c&@~O;^d
4_+Pv6
} K//T}-Uub
N}fUBX4k
} N-`;\
hXm}d\
SortUtil： ,dx)rZ*
|QLX..
package org.rut.util.algorithm; aMQjoamz
A Vm{#^p[(
import org.rut.util.algorithm.support.BubbleSort; N?;o_^C
import org.rut.util.algorithm.support.HeapSort; `mjx4Lb
import org.rut.util.algorithm.support.ImprovedMergeSort; |xZcT4
import org.rut.util.algorithm.support.ImprovedQuickSort; mE`qvavP|/
import org.rut.util.algorithm.support.InsertSort; >&QH{!(
import org.rut.util.algorithm.support.MergeSort; R9h>I3F=c
import org.rut.util.algorithm.support.QuickSort; {~fCqP.2
import org.rut.util.algorithm.support.SelectionSort; Cc)P5\jh
import org.rut.util.algorithm.support.ShellSort; *O>aqu
UglG!1L
/** 1G%PXrEj8
* @author treeroot l&*)r;9
* @since 2006-2-2 \bm6/fhA:
* @version 1.0 tvT8UW'
*/ c%@~%IGF
public class SortUtil { {|Ki^8h/p
public final static int INSERT = 1; (YHvGGr
public final static int BUBBLE = 2; cEc,eq|
public final static int SELECTION = 3; F,M"/hnPT
public final static int SHELL = 4; P4j8`}&/
public final static int QUICK = 5; W[E3P,XS
public final static int IMPROVED_QUICK = 6; S tnv>
public final static int MERGE = 7; UVc<C 1q
public final static int IMPROVED_MERGE = 8; ^}Qj}
public final static int HEAP = 9; QZ3(u<f
HDVl5X`j'
public static void sort(int[] data) { fu<2t$Cn>
sort(data, IMPROVED_QUICK); `E5"Pmg
} ej%;%`C-
private static String[] name={ yW^IN8fm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {R-82%X
}; vX0"S
yv)nW::D(
private static Sort[] impl=new Sort[]{ vM7vf6
new InsertSort(), Y#&0x_Z
new BubbleSort(), U`8|9v
new SelectionSort(), G4Kmt98I
new ShellSort(), 6WN(22Io
new QuickSort(), C`n9/[,#
new ImprovedQuickSort(), 96pk[5lj{?
new MergeSort(), rS )b1nPA
new ImprovedMergeSort(), F`0c?)
new HeapSort() ge):<k_
}; =+`j?1
#)0Tt>d6
public static String toString(int algorithm){ 'B (eMnLg
return name[algorithm-1]; LuP?$~z
} hiRR+`L%
cZr G:\A
public static void sort(int[] data, int algorithm) { 6I>5~?#
impl[algorithm-1].sort(data); a-5HIY5
} "f|(@a
BKQIo)g.G
public static interface Sort { /Y[o=Uyl
public void sort(int[] data); -nk#d%a\
} 'DzBp
8.CKH4h
public static void swap(int[] data, int i, int j) { f[Fgh@4cj
int temp = data; )W]>\=@Y
data = data[j]; N pXgyD
data[j] = temp; J4G> E.8
} px_s@>l`
} ~J1;tZS