[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; 1j<(?MT-
} z^gJy,T
int i1=l; K}VCFV
int i2=mid+1; j2Zp#E!
for(int cur=l;cur<=r;cur++){ $B+| &]a
if(i1==mid+1) wl Oeoi
data[cur]=temp[i2++]; tli.g
else if(i2>r) )ZJvx%@i
data[cur]=temp[i1++]; &SY!qTxF
else if(temp[i1] data[cur]=temp[i1++]; l]nt@0+
else _FLEz|%~
data[cur]=temp[i2++]; ^.SYAwL
} C_.9qo]DT7
} ]b/]^1-(b
)*,/L <
} @ D+ftb/
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改进后的归并排序: UkV?,P@l
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package org.rut.util.algorithm.support; L[` l80
Ac7^JXh%
import org.rut.util.algorithm.SortUtil; (L_-!=e
iHK~?qd}
/** "n-'?W!
* @author treeroot ^rkKE dd
* @since 2006-2-2 )s2] -n}W
* @version 1.0 THA9OXP
*/ `+JFvn!
public class ImprovedMergeSort implements SortUtil.Sort { (JhX:1
\u3\TJ
private static final int THRESHOLD = 10; I$Nh|eM
{Z.6\G&q
/* [&Xp]:M'D
* (non-Javadoc) ;|N:FG
* }kbSbRH43
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'm%{Rz>j
*/ ?mQ^"9^XS
public void sort(int[] data) { ntiS7g e1
int[] temp=new int[data.length]; -wlj;U
mergeSort(data,temp,0,data.length-1); zd?@xno
} uFd$*`jS
1C[9}}
private void mergeSort(int[] data, int[] temp, int l, int r) { Ycm)PU["
int i, j, k; #u<Qc T@
int mid = (l + r) / 2; od;-D~
if (l == r) ZTC>Ufu2!
return; UNI< r
if ((mid - l) >= THRESHOLD) Pg4&}bX:I
mergeSort(data, temp, l, mid); @0`A!5h?u
else &}ZmT>q`$
insertSort(data, l, mid - l + 1); @WJ;T= L
if ((r - mid) > THRESHOLD) a(Y'C`x
mergeSort(data, temp, mid + 1, r); ~{c ?-qb
else yr]ja-Y
insertSort(data, mid + 1, r - mid); iP/v"g"g
[)H 6`w
for (i = l; i <= mid; i++) { (Guzj*12
temp = data; `s}*
} \lL[08G
for (j = 1; j <= r - mid; j++) { Q&m85'r5X
temp[r - j + 1] = data[j + mid]; 6*8Wtq
} ia6 jiW x
int a = temp[l]; PN}+LOD<t
int b = temp[r]; ^5 >e
for (i = l, j = r, k = l; k <= r; k++) { >WLPE6E
if (a < b) { |@ mz@
data[k] = temp[i++]; ycGY5t@K@
a = temp; |5@Ra@0
} else { }A9#3Y|F
data[k] = temp[j--]; 3qYGEhxv
b = temp[j]; 3F9V,zWtTi
} VA/2$5Wu
} 9O[IR)O~
} {1GJ,['qL
~f QrH%@
/** ~NGM6+9
* @param data LPs%^*8(2
* @param l j:9M${~
* @param i G hM
*/ y@LImiRG
private void insertSort(int[] data, int start, int len) { s"L&y <?)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QE<Z@/V*a
} X<ex >sM
} 0AZ9I!&i
} KbJ6U75|f
} ,f03TBD}
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堆排序： U#<d",I
h yrPu_
package org.rut.util.algorithm.support; 1N5 E
[o^$WL?c
import org.rut.util.algorithm.SortUtil; ,@"yr>Q9#6
/E>;O47a
/** HOW<IZ^
* @author treeroot ;R$G.5h
* @since 2006-2-2 --HDEc|
* @version 1.0 wGHft`Z
*/ G/x6zdk
public class HeapSort implements SortUtil.Sort{ ,@Csa#
pEB3qGA
/* (non-Javadoc) N'1I6e"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cGot0' mB
*/ MmJMx
public void sort(int[] data) { e9acI>^w
MaxHeap h=new MaxHeap(); as07~Xvp-
h.init(data); e\)%<G5
for(int i=0;i h.remove(); ^!['\
System.arraycopy(h.queue,1,data,0,data.length); hB?#b`i^
} R P{pEd
%Tp9GGt
private static class MaxHeap{ 3h bHS~
eDd&vf
void init(int[] data){ aru2H6
this.queue=new int[data.length+1]; k?cX fj&
for(int i=0;i queue[++size]=data; ,~L*N*ML
fixUp(size); YB*)&@yx
} @Y~gdK
} a$W O}g?
fb f&bJT
private int size=0; pbzt8 P[
:GvC#2p
private int[] queue; !&%KJS6p4
sBlq)h;G?6
public int get() { R;"$PHD
return queue[1]; dcKpsX
} h!B{7J
NbWEP\dS'z
public void remove() { 9^^\Z5
SortUtil.swap(queue,1,size--); Zl_sbIY
fixDown(1); HSud$(w
} fMwF|;
file://fixdown )~M@2;@L
private void fixDown(int k) { mmQC9nZ
int j; Q_T,=y
while ((j = k << 1) <= size) { %<~EwnoT
if (j < size %26amp;%26amp; queue[j] j++; fD%/]`y
if (queue[k]>queue[j]) file://不用交换 /@"mQx~[q
break; 5REH`-
SortUtil.swap(queue,j,k); 2
k = j; P]"@3Z&w
} W3l[a^1d
} $%U}k=-
private void fixUp(int k) { xpZ@DK;
while (k > 1) { f*@ :,4@
int j = k >> 1; +R?E @S
if (queue[j]>queue[k]) x~'_;>]r_
break; [voc_o7AI
SortUtil.swap(queue,j,k); d%@0xsU1
k = j; l="(Hp%b
} *7*_QW%?A
} n4?;!p<F
`-nSH)GBM
} .aL%}`8l?
|yNyk7~
} Q3r]T.].h
$_%
SortUtil： 2SC'Z>A
1`II%mf[
package org.rut.util.algorithm; K[SzE{5=P
4o''C |ND
import org.rut.util.algorithm.support.BubbleSort; :wzbD,/M
import org.rut.util.algorithm.support.HeapSort; q.:a4w J
import org.rut.util.algorithm.support.ImprovedMergeSort; "% i1zQo&
import org.rut.util.algorithm.support.ImprovedQuickSort; 9U9ghWH8
import org.rut.util.algorithm.support.InsertSort; &xj40IZ
import org.rut.util.algorithm.support.MergeSort; c5CxR#O
import org.rut.util.algorithm.support.QuickSort; lYS4Q`z$
import org.rut.util.algorithm.support.SelectionSort; qq^[(n
import org.rut.util.algorithm.support.ShellSort; u 'ng'j'
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/** Vg(p_k45`
* @author treeroot |rpMwkR
* @since 2006-2-2 _ru<1n[4~
* @version 1.0 'o_ RC{k2"
*/ U;4;>
public class SortUtil { (^=kV?<
public final static int INSERT = 1; d6W&u~
public final static int BUBBLE = 2; VuBi_v6
public final static int SELECTION = 3; 1^Q!EV
public final static int SHELL = 4; acpc[^'
public final static int QUICK = 5; \ }-v
public final static int IMPROVED_QUICK = 6; Z\-Gr 2k
public final static int MERGE = 7; 7|m{hSc
public final static int IMPROVED_MERGE = 8; 8Z@O%\1x6
public final static int HEAP = 9; z_C7=ga<
Yk4ah$}%-^
public static void sort(int[] data) { xoSBMf
sort(data, IMPROVED_QUICK); 6yaWxpW
} p8y<:8I
private static String[] name={ I1ibrn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yC}x6xG
}; g2lv4Tiq-
)P/~{Ci:T&
private static Sort[] impl=new Sort[]{ lr,i5n{6
new InsertSort(), ?!34qh
new BubbleSort(), or`"{wop
new SelectionSort(), 7 dG_E]&
new ShellSort(), F,5}3$
new QuickSort(), yErvgf
new ImprovedQuickSort(), 'bef3P9`
new MergeSort(), .|ZnU]~T
new ImprovedMergeSort(), 6Hpj&Qm
new HeapSort() .Vq_O u
}; $L"-JNS
piUfvw
public static String toString(int algorithm){ <>1*1%m
return name[algorithm-1]; avv/mEf-f
} I8hmn@ce
YAF0I%PYU
public static void sort(int[] data, int algorithm) { qr/N?,
impl[algorithm-1].sort(data); \AR3DDm
} 6dCqS
iu,Bmf^oD
public static interface Sort { ;UjP0z
public void sort(int[] data); RA62Z&W3
} XG6UV('
PDh1*bf{u
public static void swap(int[] data, int i, int j) { wa9{Q}wSa
int temp = data; Boa?Ghg
data = data[j]; CV,[x[L#{
data[j] = temp; }Sb&ux
} jr5x!@rb
} HYk*;mD