[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; DFZ@q=ZT
} 9&zR i
int i1=l; \fC;b"j
int i2=mid+1; r|ZB3L|7
for(int cur=l;cur<=r;cur++){ a""9%./B
if(i1==mid+1) t1 9f%d
data[cur]=temp[i2++]; \VIY[6sn\M
else if(i2>r) >{~xO 6H
data[cur]=temp[i1++]; mYJ8O$
else if(temp[i1] data[cur]=temp[i1++]; uMGy-c
else 7;'UC','
data[cur]=temp[i2++]; ZGX"Vn|YL
} ,#;`f=aqTG
} +,R!el!o~u
`%#_y67v
} %nq<nfDT
2P'Vp7f6 Y
改进后的归并排序: ZHeue_~x4
Uv.Xw}q
package org.rut.util.algorithm.support; 0Qeda@J
S?i^ ~
import org.rut.util.algorithm.SortUtil; h7K,q S
x4g6Qze
/** 9cN@y<_I
* @author treeroot $4ZV(j]
* @since 2006-2-2 By!u*vSev
* @version 1.0 =Oh$pZRymu
*/ "8zMe L
public class ImprovedMergeSort implements SortUtil.Sort { Si~wig2
BH^*K/^
private static final int THRESHOLD = 10; #k>n5cR@0
0)h.[O8@>
/* ZW"f*vwQo
* (non-Javadoc) \pK&gdw
* ?Q=(?yR0]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /{8Y,pZbu
*/ @##}zku
public void sort(int[] data) { H*0g*(
int[] temp=new int[data.length]; CiHx.5TiC
mergeSort(data,temp,0,data.length-1); #WG;p(?:
} 3K~^H1l
1#"wfiW
private void mergeSort(int[] data, int[] temp, int l, int r) { &u[F)|
int i, j, k; !E00I0W-h
int mid = (l + r) / 2; &``nD
if (l == r) ]P7gEBi
return; G] tT=X[
if ((mid - l) >= THRESHOLD) b9i_\
mergeSort(data, temp, l, mid); B$s6|~
else F+R1}5-3cl
insertSort(data, l, mid - l + 1); ZT/f
if ((r - mid) > THRESHOLD) d!&LpODI]*
mergeSort(data, temp, mid + 1, r); 0]DX KI
else x2I|iA=
insertSort(data, mid + 1, r - mid); =M@)qy
\J?&XaO=
for (i = l; i <= mid; i++) { ^hEN
temp = data; V?^qW#AG
} Xu_1r8-|=b
for (j = 1; j <= r - mid; j++) { r:0RvWif
temp[r - j + 1] = data[j + mid]; Dvz 6 E
} hTby:$aCg
int a = temp[l]; J'=s25OWU
int b = temp[r]; c; .y
for (i = l, j = r, k = l; k <= r; k++) { \?e2qu/ C
if (a < b) { 3bC-B!{;g
data[k] = temp[i++]; d@JavcR
a = temp; j;j~R3B
} else { fWfhs}_
data[k] = temp[j--]; k8}'@w
b = temp[j]; ;2fzA<RkK
} K]>4*)A:
} u\xrC\Ka
} G5 )"%G.
"k [$euV
/** Wx;%W"a
* @param data fIx|0,D&7L
* @param l h;} fdk
* @param i S$wC{7?f
*/ 'i3-mZ/|8
private void insertSort(int[] data, int start, int len) { O@HD'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w\Q(wH'
} l&] %APL
} MB>4Y]rtU
} Z *l&<q>#
} ~]W @+\l
u5U^}<}y}
堆排序： d@Bd*iI<
\Z%_dT}
package org.rut.util.algorithm.support; Bgsi$2hI
!VG ]~lc
import org.rut.util.algorithm.SortUtil; xQ?$H?5B<
qIzv|Nte
/** UiK)m:NU
* @author treeroot n^G[N-\3
* @since 2006-2-2 +W[{UC4b
* @version 1.0 V*%><r
*/ B=_5gZ4Y
public class HeapSort implements SortUtil.Sort{ M6]:^;p'
HPO:aGU
/* (non-Javadoc) tg/!=g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5?j#
*/ Y3)*MqZlF
public void sort(int[] data) { Lq@uwiq!
MaxHeap h=new MaxHeap(); Dg ~k"Ice
h.init(data); JGzEm>_m
for(int i=0;i h.remove(); T`I4_x
System.arraycopy(h.queue,1,data,0,data.length); brCL"g|}
} nM8'="$
6(A"5B=\
private static class MaxHeap{ 0Y~5|OXJ
1Sns$t%b
void init(int[] data){ q8e]{sT'!
this.queue=new int[data.length+1]; [zrFW g6N
for(int i=0;i queue[++size]=data; a*_" nI&lr
fixUp(size); dt<P6pK-
} &)!N5Veb
} `v/p4/
7Z}T!HFMr
private int size=0; %|2x7@&s
e<u~v0rDl
private int[] queue; Fb{HiU9<!
1[RI 07g7*
public int get() { vBY?3p,0p
return queue[1]; R\6dvd
} #N97
_w5c-\-PUM
public void remove() { !.|A}8nK
SortUtil.swap(queue,1,size--); te>Op 1R
fixDown(1); &y3;`A7,
} q?0&0
file://fixdown 1yc$b+TH
private void fixDown(int k) { [A;0IjKam
int j; R&/"?&pfa
while ((j = k << 1) <= size) { =| r% lx
if (j < size %26amp;%26amp; queue[j] j++; q{q;X{
if (queue[k]>queue[j]) file://不用交换 v+d`J55
break; 1:I _;O_
SortUtil.swap(queue,j,k); b^P\Kky
k = j; |gGD3H
} `7V'A
} ^NxKA'oWQ
private void fixUp(int k) { fzjtaH?
while (k > 1) { 7zNfq.Ni~
int j = k >> 1; r8_MIGM'
if (queue[j]>queue[k]) \tU[,3
break; ZzT"u1,&
SortUtil.swap(queue,j,k); ZZeF1y[q
k = j; (.$e@k=
} r,GgMk
} [&p/7
HIlTt
} 1HRcEzA
C8 $KVZ
} }%,LV]rGEZ
P[,
SortUtil： j'SGZnsy*
4"+v:t)z6{
package org.rut.util.algorithm; D<^K7tJui
EuD$^#
import org.rut.util.algorithm.support.BubbleSort; NQd0$q
import org.rut.util.algorithm.support.HeapSort; \Dx)P[Ur
import org.rut.util.algorithm.support.ImprovedMergeSort; v@:m8Y(t
import org.rut.util.algorithm.support.ImprovedQuickSort; J>0RN/38o
import org.rut.util.algorithm.support.InsertSort; OK:YnSk"
import org.rut.util.algorithm.support.MergeSort; t1o_x}z4.
import org.rut.util.algorithm.support.QuickSort; ]rO/IuB
import org.rut.util.algorithm.support.SelectionSort; VQ2B|v
import org.rut.util.algorithm.support.ShellSort; o~'UWU'#
~2XiKY;W?
/** h7}P5z0F
* @author treeroot X/S%0AwZ
* @since 2006-2-2 }~ga86:n0
* @version 1.0 n=h!V$X
*/ ^QTkre
public class SortUtil { |f[:mO
public final static int INSERT = 1; U;U19[]
public final static int BUBBLE = 2; 7I:<i$)V
public final static int SELECTION = 3; ","to
public final static int SHELL = 4; B}d)e_uLj
public final static int QUICK = 5; XiyL563gh
public final static int IMPROVED_QUICK = 6; ,LDdL
public final static int MERGE = 7; #4^D'r>pJ
public final static int IMPROVED_MERGE = 8; t)l^$j!h@
public final static int HEAP = 9; arn7<w0
04!akPP<
public static void sort(int[] data) { +tv"j;z
sort(data, IMPROVED_QUICK); SiT5QJe
} J~5+=V7OV
private static String[] name={ |+aD%'|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IOH6h=
}; /|[%~`?BM
tfd!;`B
private static Sort[] impl=new Sort[]{ 212
new InsertSort(), 1lHBg
new BubbleSort(), n'<F'1SWv
new SelectionSort(), b5UIX Kim
new ShellSort(), .$r7q[
new QuickSort(), I oC}0C7
new ImprovedQuickSort(), _I#a`G
new MergeSort(), yJHFo[wGMJ
new ImprovedMergeSort(), 2NWQiSz
new HeapSort() ,mD{4 >7
}; (fC U+
h_xzqElZu
public static String toString(int algorithm){ MZ<BCRB
return name[algorithm-1]; (L7%V !
} M}!E :bv'
S>EO6z#
public static void sort(int[] data, int algorithm) { ,) 3Eog\-
impl[algorithm-1].sort(data); 0d #jiG
} EceD\}
A@ 4Oq
public static interface Sort { Qr*7bE(a
public void sort(int[] data); +bcJm
} G/_9!lE
1(m[L=H5>
public static void swap(int[] data, int i, int j) { NvjKB)J
int temp = data; .^!uazPE0
data = data[j]; s!j vBy
data[j] = temp; j{H,{x
} u~j&g
} o<i\1<eI