[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; p`XI(NI
} H@OYtPHGR
int i1=l; ~I2IgEj>]
int i2=mid+1; bCc^)o/w
for(int cur=l;cur<=r;cur++){ QNn$`Qz.
if(i1==mid+1) S1zV.]
data[cur]=temp[i2++]; !%]]lxi
else if(i2>r) i7*4hYY
data[cur]=temp[i1++]; 0I079fqk<
else if(temp[i1] data[cur]=temp[i1++]; oDA1#-
else e>"{nOY4
data[cur]=temp[i2++]; d0IHl!X
} -s4qm)\
} zn@tLLX
F5&4x"c
} L +-B,466
{ 5h6nYu
改进后的归并排序: %-H
&eyFApM[Z
package org.rut.util.algorithm.support; K*p^Gs,
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import org.rut.util.algorithm.SortUtil; =3""D{l
#^#N%_8
/** eEupqOF*:W
* @author treeroot R6CxNPRJ
* @since 2006-2-2 \tU91VIj
* @version 1.0 O:#t> ;
*/ hA)3Ah*
public class ImprovedMergeSort implements SortUtil.Sort { Xg#Dbf4
e6#^4Y/+`
private static final int THRESHOLD = 10; .2Gn)dZU
)|'? uN7
/* #%B1,.A
* (non-Javadoc) JFl@{6c
* I)9;4lix
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t$rWE|+_z
*/ qDNqd
public void sort(int[] data) { KZ;U6TBiB
int[] temp=new int[data.length]; aFd ,
mergeSort(data,temp,0,data.length-1); <86upS6
} 1rT}mm/e;
nA5v+d-<T
private void mergeSort(int[] data, int[] temp, int l, int r) { (9@6M8A
int i, j, k; A]ciox$AjW
int mid = (l + r) / 2; ogDyrY}]
if (l == r) OZ$u&>916
return; xOPSw|!w
if ((mid - l) >= THRESHOLD) Vz51=?75
mergeSort(data, temp, l, mid); js'*:*7
else Xpjk2[,
insertSort(data, l, mid - l + 1); 0.bmVN<
if ((r - mid) > THRESHOLD) B1J+`R3OX
mergeSort(data, temp, mid + 1, r); x^9W<
else %GjF;dJ
insertSort(data, mid + 1, r - mid); N]}L*o&
h`?0=:Tru
for (i = l; i <= mid; i++) { x-(?^g
temp = data; ,$7LMTVDrE
} e2k!5OS
for (j = 1; j <= r - mid; j++) { _sJp"4?
temp[r - j + 1] = data[j + mid]; %UY=VE\F
} 5|&Sg}_
int a = temp[l]; J1P82=$,
int b = temp[r]; 9akCvY#Q
for (i = l, j = r, k = l; k <= r; k++) { );7csh%
if (a < b) { )xlNj$(x5n
data[k] = temp[i++]; c"77<Db$
a = temp; a{el1_DIGK
} else { +#,t
data[k] = temp[j--]; auaFP-$`f
b = temp[j]; ~\Fde^1
} &I<R|a
} 2mVH*\D
} i#iY;R8
)6^b\`
/** Vr`UF0_3q
* @param data z35n3q
* @param l y @h^
* @param i VqbMFr<k
*/ 9{?<.%
private void insertSort(int[] data, int start, int len) { 24>{T5E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j?3J-}XC
} ?^5W.`Y2i
} 9O~1o?ni
} ib*$3Fn~
} }0}J
$1#|<|
堆排序： nS]/=xP{
BDD^*Y
package org.rut.util.algorithm.support; ,N5Rdgzk
&h8+-
import org.rut.util.algorithm.SortUtil; -L</,>p
cD-\fRBGK
/** >")%4@
* @author treeroot 2m/1:5
* @since 2006-2-2 &=K-~!?
* @version 1.0 _QkU,[E
*/ rL&585
public class HeapSort implements SortUtil.Sort{ SDcD(G
3sHC1+
/* (non-Javadoc) HOtays,#<}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KvkiwO(
*/ E':y3T@."
public void sort(int[] data) { g6;O)b
MaxHeap h=new MaxHeap(); pG:FDlR~
h.init(data); IgR_p7['.
for(int i=0;i h.remove(); Op\l
System.arraycopy(h.queue,1,data,0,data.length); BY32)8SH
} ]e7D""
R8O<}>3a
private static class MaxHeap{ ~$YFfv>
gXc&uR0S
void init(int[] data){ xBR2tDi%
this.queue=new int[data.length+1]; dD@T}^j *|
for(int i=0;i queue[++size]=data; sW@4r/F>:D
fixUp(size); UOT~L4G
} +twJHf_U
} e8--qV#<
ib;:*
private int size=0; c]t=#
onHUi]yYu{
private int[] queue; T[~ak"M
\E]s]ft;+
public int get() { P=(\3ok
return queue[1]; SI8mr`gJ
} hdfNXZ{A"
.ye5;A}
public void remove() { @1^iWM j
SortUtil.swap(queue,1,size--); rqT@i(i
fixDown(1); u`R
} xa5I{<<U
file://fixdown D.)R8X
private void fixDown(int k) { ,hYUxh45
int j; ^A;v|U
while ((j = k << 1) <= size) { b"/P
if (j < size %26amp;%26amp; queue[j] j++; [;h@q}
if (queue[k]>queue[j]) file://不用交换 - "h {B
break; q}1AV7$Ai
SortUtil.swap(queue,j,k); i*nNu-g
k = j; !NZFo S~
} O`rAqO0F
} ){icI<
private void fixUp(int k) { i[T!{<
while (k > 1) { q71Tg
int j = k >> 1; ;,'eO i
if (queue[j]>queue[k]) $l0^2o=
break; haqL DVrf
SortUtil.swap(queue,j,k); j""u:l^+x
k = j; &AoXv`l4
} . m@Sk`s
} !sK{:6s
5lVDYmh
} coyy T
.y#@~H($
} p@YU7_sF^!
GwxfnCKi9
SortUtil： _u]Wr%D@
`~VV1
package org.rut.util.algorithm; HwiG~'Ah9
SI4M<'fK
import org.rut.util.algorithm.support.BubbleSort; o%RyE]pw,
import org.rut.util.algorithm.support.HeapSort; AL3zE=BL
import org.rut.util.algorithm.support.ImprovedMergeSort; {[NBTT9&
import org.rut.util.algorithm.support.ImprovedQuickSort; pR; AqDQ
import org.rut.util.algorithm.support.InsertSort; s@K|zOx
import org.rut.util.algorithm.support.MergeSort; ko=vK%E[
import org.rut.util.algorithm.support.QuickSort; OqHD=D[
import org.rut.util.algorithm.support.SelectionSort; {6 C!^ 5
import org.rut.util.algorithm.support.ShellSort; _LCK|H%v'
BQ2DQ7q
/** -jFvDf,M,D
* @author treeroot }9:d(B9;
* @since 2006-2-2 |r%6;8A]i
* @version 1.0 cQA;Y!Q#
*/ k`'^e/
public class SortUtil { D)K/zh)
public final static int INSERT = 1; '\[GquK;P
public final static int BUBBLE = 2; `G@]\)-!
public final static int SELECTION = 3; WVir[Kv%
public final static int SHELL = 4; o~*% g.
public final static int QUICK = 5; mj{TqF
public final static int IMPROVED_QUICK = 6; Vj2]-]Cm
public final static int MERGE = 7; EO:i+e]=
public final static int IMPROVED_MERGE = 8; j1_CA5V
public final static int HEAP = 9; OU/PB
diaLw
public static void sort(int[] data) { '>@evrG
sort(data, IMPROVED_QUICK); }BzV<8F
} TMT65X!
private static String[] name={ /!P,o}l7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F MHpa
}; &Plc
)xoIH{
private static Sort[] impl=new Sort[]{ Kj;Q;Ii
new InsertSort(), #JWW ;M6F
new BubbleSort(), Nw/4z$].J
new SelectionSort(), =NQDxt}
new ShellSort(), Cevl#c5p>
new QuickSort(), g-bHf]'
new ImprovedQuickSort(), F$^RM3
new MergeSort(), es6!p 7p?
new ImprovedMergeSort(), }[ld=9p(
new HeapSort() {M)Y6\v
}; a[1^)=/DM
5.q2<a :
public static String toString(int algorithm){ 6`J*{%mP
return name[algorithm-1]; z)#I"$!d
} bLhTgss](
~+/IzckrG
public static void sort(int[] data, int algorithm) { )CD4k:bm
impl[algorithm-1].sort(data); Tuo`>ZA
} cGIxE[n'
+? E~F
public static interface Sort { onI%Jl sq
public void sort(int[] data); iV58 m
} ; $i{>mDT
zogw1g&C
public static void swap(int[] data, int i, int j) { hs!a'E
int temp = data; &5h{XSv
data = data[j]; o:W>7~$jr=
data[j] = temp; Ej~vp2
} iVu
} KLBU8%