[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; aG/L'weR
} aT%6d@g
int i1=l; %%Z|6V74
int i2=mid+1; >PK\bLEo
for(int cur=l;cur<=r;cur++){ D*o[a#2_
if(i1==mid+1) (= ,w$
data[cur]=temp[i2++]; ,#QLc
else if(i2>r) :TN^}RML
data[cur]=temp[i1++]; nXcOFU
else if(temp[i1] data[cur]=temp[i1++]; pbb6?R,
else F5;x>;r
data[cur]=temp[i2++]; \l9S5%L9
} CGN:=D<
} MbeO(Q
Xw[|$#QKM
} ?*)wQZt;
8gI~x.k`
改进后的归并排序: !)TO2?,^
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package org.rut.util.algorithm.support; 8t Ef>
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import org.rut.util.algorithm.SortUtil; 7Yd]#K{$
^J$?[@qD
/** q<*UeyE S
* @author treeroot \hT=U*dMR
* @since 2006-2-2 # ~T KC|G
* @version 1.0 Gu P1
*/ 60&4?<lR4
public class ImprovedMergeSort implements SortUtil.Sort { ImVHX~qHJ
d 1bx5U
private static final int THRESHOLD = 10; dTW3mF4=
q2KWSh5
/* EkEU}2
* (non-Javadoc) pUXszPf
* nXnO]wXC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vx8-~Oq{|;
*/ .ITR3]$
public void sort(int[] data) { v22ZwP
int[] temp=new int[data.length]; p[lciWEW
mergeSort(data,temp,0,data.length-1); BSib/)p
} 0"to]=
4P\?vz"
private void mergeSort(int[] data, int[] temp, int l, int r) { *wetPt)~v_
int i, j, k; xnm!$ $W
int mid = (l + r) / 2; &DgJu.
if (l == r) qCaM]Y
return; kan4P@XVS
if ((mid - l) >= THRESHOLD) t)/:VImY
mergeSort(data, temp, l, mid); ^-i<TJ
else ;+h-o
insertSort(data, l, mid - l + 1); juc;]CHt'
if ((r - mid) > THRESHOLD) geB]~/-p
mergeSort(data, temp, mid + 1, r); Ue22,Pp6
else 8f0Ytfhw
insertSort(data, mid + 1, r - mid); 4?)-;Hx_X
t&99ZdE
for (i = l; i <= mid; i++) { &;O)Dw
temp = data; gr y]!4Hy
} ;3H#8x-
for (j = 1; j <= r - mid; j++) { p+>vX X
temp[r - j + 1] = data[j + mid]; zgh~P^Z
} K9(Su`zr
int a = temp[l]; 0ynvn9@t
int b = temp[r]; ,S7g=(27(
for (i = l, j = r, k = l; k <= r; k++) { KDzTe9
if (a < b) { YZH&KGY
data[k] = temp[i++]; D-IXO@x
a = temp; BE]PM nI
} else { wkwsBi
data[k] = temp[j--]; #^ cmh
b = temp[j]; &^4E)F
} +Y
} UF ]g6u
} \h}a?T6
NlnmeTLO5
/** Yuo
* @param data L)Iv]u
* @param l V!94I2%#x
* @param i <(U:v
*/ :UgCP ~Y
private void insertSort(int[] data, int start, int len) { 2l9RU}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z7t-{s64
} 0=^A{V!m
} M>BcYbXf
} }JKK"d}U
} BCK0fk~
T+y3Ph--^
堆排序： 5@xl/
;%H/^b.c
package org.rut.util.algorithm.support; @a{1vT9b
N$i|[>`j
import org.rut.util.algorithm.SortUtil; `>mT/Rmb@
v3vQfcxR
/** hD5G\TR.
* @author treeroot mSu1/?PS
* @since 2006-2-2 ^l(Kj3gM
* @version 1.0 |rDv!m
*/ !h "6h
public class HeapSort implements SortUtil.Sort{ rz@;Zn
pg%'_+$~m
/* (non-Javadoc) 0rtP :Nj$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZKv^q%92
*/ )+nY-DB(
public void sort(int[] data) { x*" 0dYH
MaxHeap h=new MaxHeap(); LS=HX~5C
h.init(data); 'L"dM9#>
for(int i=0;i h.remove(); )fo9Qwe
System.arraycopy(h.queue,1,data,0,data.length); `2M`;$~ 5
} +Xg]@IS-eg
AJ*FQo.U
private static class MaxHeap{ AIR\>.~"i*
Q'ok%9q!p
void init(int[] data){ xgi/,Nk '
this.queue=new int[data.length+1]; 0m|$ vb
for(int i=0;i queue[++size]=data; W\tSXM-Hg
fixUp(size); $1h,<$5H
} Y!8Ik(/~i
} -2dk8]KB]
<3;Sq~^
private int size=0; ) DzbJ}
Fj`6v"h
private int[] queue; (>E70|T
=psX2?%L
public int get() { HW)4#nLhh
return queue[1]; `nxm<~-\
} kAEm#oz=g
=3Y:DPMB
public void remove() { 4EO,9#0
SortUtil.swap(queue,1,size--); U2DE"
fixDown(1); .5',w"R
} GJLlMi
file://fixdown ]&')#YO
private void fixDown(int k) { Ighd,G-
int j; `(r[BV|h}
while ((j = k << 1) <= size) { gsqpQq7
if (j < size %26amp;%26amp; queue[j] j++; yJ(p-3O5
if (queue[k]>queue[j]) file://不用交换 MmjeFv
break; uHv9D%R
SortUtil.swap(queue,j,k); Hvn{aLa.
k = j; nH#|]gVI
} K&t+3O
} c({V[eGY
private void fixUp(int k) { JO4rU- n
while (k > 1) { ~"E@do("
int j = k >> 1; yX}riXe
if (queue[j]>queue[k]) }4!R2c
break; o2FQ/EIE
SortUtil.swap(queue,j,k); v>2gx1F"?
k = j; |G+6R-_
} vpoeK'bi,
} c&1:H1#
z(AhO
} V Q6&7@ c
<$^76=x,8P
} z*cC2+R}=
p*T`fOL
SortUtil： .kl _F7
]*8K4n G
package org.rut.util.algorithm; .Y8z3O
cax]lO
import org.rut.util.algorithm.support.BubbleSort; Ylc[ghx
import org.rut.util.algorithm.support.HeapSort; 8\+Q*7~@i
import org.rut.util.algorithm.support.ImprovedMergeSort; Jon<?DQj
import org.rut.util.algorithm.support.ImprovedQuickSort; e5!LbsJv
import org.rut.util.algorithm.support.InsertSort; H]LH~l
import org.rut.util.algorithm.support.MergeSort; i)Hjmf3
import org.rut.util.algorithm.support.QuickSort; $nB4Ie!WcR
import org.rut.util.algorithm.support.SelectionSort; y{.s 4NT
import org.rut.util.algorithm.support.ShellSort; %<|w:z$vp
-.8 nEO3
/** mCa[?
* @author treeroot }{J5)\s9
* @since 2006-2-2 l .8@F
* @version 1.0 t;7 tuq
*/ v-;j44sB
public class SortUtil { s3+^q
public final static int INSERT = 1; wic& $p/%
public final static int BUBBLE = 2; }n+#o!uEf
public final static int SELECTION = 3; 6]=$c<.&
public final static int SHELL = 4; vZHm'
public final static int QUICK = 5; de?Bn+mvi.
public final static int IMPROVED_QUICK = 6; ]]\\Y|0
public final static int MERGE = 7; :27GqY,3sK
public final static int IMPROVED_MERGE = 8; 5",@!1ju
public final static int HEAP = 9; 8Bvc#+B
WUQlAsme
public static void sort(int[] data) { YQyf:xJ
sort(data, IMPROVED_QUICK); ~kdxJP"
} 5]/i[T_
private static String[] name={ bk@F/KqL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~bSPtH ]6d
}; GA,6G [E
wf4?{H
private static Sort[] impl=new Sort[]{ prf
new InsertSort(), 1m*fkM#
new BubbleSort(), 01n5]^.p
new SelectionSort(), +Ar=89
new ShellSort(), "~y@rqIba
new QuickSort(), qNI2+<u)j
new ImprovedQuickSort(), ('qu#.'
new MergeSort(), (Kl96G<Wej
new ImprovedMergeSort(), <r_L-
new HeapSort() F;5S2:a@Z
}; g$c\(isY;
m{(G%n>E&
public static String toString(int algorithm){ 'lPt.*Y<u
return name[algorithm-1]; vf=b5s(7Q
} <IWO:7*#
I:4m]q b
public static void sort(int[] data, int algorithm) { $F|3VQ~
impl[algorithm-1].sort(data); [whX),3>
} N? r{Y$x
c2aX_ "
public static interface Sort { ZXP9{Hh
public void sort(int[] data); 3g!tk9InG
} UADD 7d
oe<9CK:?>
public static void swap(int[] data, int i, int j) { "*E#4e[
int temp = data; Rf)lFi
data = data[j]; *.X!AJ;M=O
data[j] = temp; P4xQ:$2!
} Uq0GbLjv"
} qJ).;S{AAt