[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; b !@Sn/
} Pz#7h*;cw.
int i1=l; qSqI7ptA\
int i2=mid+1; keW~ NM
for(int cur=l;cur<=r;cur++){ up3O|lj4
if(i1==mid+1) -4rDbDsr
data[cur]=temp[i2++]; XfE?C:v
else if(i2>r) 1be %G [*
data[cur]=temp[i1++]; {CG_P,FO
else if(temp[i1] data[cur]=temp[i1++]; 3nZ9m
else aJL^AG
data[cur]=temp[i2++]; AsS$C&^
} 5 8-e^.
} w@-PqsF
W6T|iZoV"r
} N..j{FE
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改进后的归并排序: L9Z;:``p
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package org.rut.util.algorithm.support; l\AMl \
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import org.rut.util.algorithm.SortUtil; /&& 2u7*
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/** etT +
* @author treeroot X8dR+xd
* @since 2006-2-2 +;g{$da5
* @version 1.0 &Cim!I
*/ "\Egs)\
public class ImprovedMergeSort implements SortUtil.Sort { "Td`AuP@,
4nH*Ui!T
private static final int THRESHOLD = 10; 8(.mt/MR
R+q"_90_
/* V}d9f2
* (non-Javadoc) KTvzOI8
* &mj6rIz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6iEhsL&K
*/ zf4Ec-)
public void sort(int[] data) { fPi3sb`}
int[] temp=new int[data.length]; YSJy`
mergeSort(data,temp,0,data.length-1); F/m^?{==~*
} L@75-T
9!9Z~/*m
private void mergeSort(int[] data, int[] temp, int l, int r) { W3vi@kb]
int i, j, k; !3iGz_y
int mid = (l + r) / 2; rhpPCt
if (l == r) pME{jD
return; ZKQ hbNT
if ((mid - l) >= THRESHOLD) bWl5(S` Z
mergeSort(data, temp, l, mid); 4L-:*b_v\
else L-pVltX
insertSort(data, l, mid - l + 1); xvzr:pP
if ((r - mid) > THRESHOLD) Uie?9&3
mergeSort(data, temp, mid + 1, r); O20M[_S
else i |{Dd%4vK
insertSort(data, mid + 1, r - mid); `r5$LaD
T5Q{{@Q
for (i = l; i <= mid; i++) { +,:du*C
temp = data; c`lJu_
} 48|s$K^
for (j = 1; j <= r - mid; j++) { O\K_q7iO6
temp[r - j + 1] = data[j + mid]; :Ih|en^w
} y@j,a
int a = temp[l]; ) xbO6V
int b = temp[r]; Tu{h<Zy
for (i = l, j = r, k = l; k <= r; k++) { )!g{Sbl
if (a < b) { 2j(h+?N7k
data[k] = temp[i++]; fgNU03jp^x
a = temp; K.G$]H
} else { =.y*_Ja
data[k] = temp[j--]; HL/bS/KX
b = temp[j]; *Nyev]8
} ^qCkt1C-M
} LG~S8u
} JKer//ng4
9Rm/V5
/** f<+4rHT
* @param data bX.ja;;
* @param l 8Qh#)hiW!
* @param i $Vc~/>
*/ ut>4U'.H
private void insertSort(int[] data, int start, int len) { v7%X@j]ji
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t9&cE:n
} |AlR^N
} yNm:[bOER
} Z5c~^jL$-
} Te2zK7:
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堆排序： Rwr 2gMt7
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package org.rut.util.algorithm.support; kc/{[ME
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import org.rut.util.algorithm.SortUtil; ^QuiH'
Q'k\8'x
/** V\V)<BARe
* @author treeroot \4"S7.% |
* @since 2006-2-2 J5h+s-'
* @version 1.0 &V|>dLT>A
*/ 5Z4-Z
public class HeapSort implements SortUtil.Sort{ |QV!-LK
jjJ2>3avY
/* (non-Javadoc) qQ!1t>j+H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0Ok,oW{
*/ Qb8KPpd
public void sort(int[] data) { ZVeaTK4_ t
MaxHeap h=new MaxHeap(); ZoKcJA
h.init(data); ~&\ f|%
for(int i=0;i h.remove(); _"4xKh)
System.arraycopy(h.queue,1,data,0,data.length); GE>[*zN
} q1E:l!2al
)2,eFNB#n
private static class MaxHeap{ 0Z|FZGRP
pZ#ap<|>I
void init(int[] data){ v/*Y#(X
this.queue=new int[data.length+1]; 2<mW\$
for(int i=0;i queue[++size]=data; sH[ -W-
fixUp(size); [m+iQVk'
} @aQ1khEd
} y~IuPc
kE TT4U
private int size=0; n.hv!W0
M MzGd:0b
private int[] queue; H3{GmV8
l!#m&'16"
public int get() { Jc)^49Rf
return queue[1]; "RVcA",
} %gnM(pxl
k%y9aO
public void remove() { T0)"1D<l
SortUtil.swap(queue,1,size--); 3]-_q"Co4f
fixDown(1); `nUO l
} l"n{.aL
file://fixdown p;?*}xa
private void fixDown(int k) { S4witIK5
int j; jlFk@:y4
while ((j = k << 1) <= size) { VF&Z%O3n
if (j < size %26amp;%26amp; queue[j] j++; m\/ Tj0e
if (queue[k]>queue[j]) file://不用交换 :S$l"wrh\
break; a?yMHb{F
SortUtil.swap(queue,j,k); yT{8d.Rh
k = j; 2iu_pjj
} ~x{.jn
} {_RWVVVe
private void fixUp(int k) { 6z,&i
while (k > 1) { `:'w@(q
int j = k >> 1; KRJLxNr
if (queue[j]>queue[k]) [OOS`N4<
break; \:> Wpqw
SortUtil.swap(queue,j,k); *&AfR8x_z
k = j; {{C`mgC
} ,Ma.V\T[
} c:83LZ
vd`}/~o
} @H!$[m3
XWJwJ
} q P ;A}C
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SortUtil： F_xbwa*=
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package org.rut.util.algorithm; y]%w)4PS
;X,1&#I
import org.rut.util.algorithm.support.BubbleSort; 6.t',LTB
import org.rut.util.algorithm.support.HeapSort; I2(zxq&2M\
import org.rut.util.algorithm.support.ImprovedMergeSort; _md=Q$9!m
import org.rut.util.algorithm.support.ImprovedQuickSort; UN"(5a8.
import org.rut.util.algorithm.support.InsertSort; s<x1>Q7X~
import org.rut.util.algorithm.support.MergeSort; nS()u}c;r
import org.rut.util.algorithm.support.QuickSort; QrApxiw
import org.rut.util.algorithm.support.SelectionSort; zF4[}*
import org.rut.util.algorithm.support.ShellSort; ,fEO> i
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/** wOB azWa
* @author treeroot LtT\z<bAI
* @since 2006-2-2 C1T_9}L-A
* @version 1.0 E^w:KC2@
*/ ZxGP/D
public class SortUtil { = sAn,ri
public final static int INSERT = 1; uH3D{4
public final static int BUBBLE = 2; D+lzFn$3
public final static int SELECTION = 3; lq.Te,Y%w
public final static int SHELL = 4; @eqeN9e
public final static int QUICK = 5; B*!WrB:s
public final static int IMPROVED_QUICK = 6; 4YZS"K'E
public final static int MERGE = 7; zb6ju]2
public final static int IMPROVED_MERGE = 8; wPbkUVO
public final static int HEAP = 9; x*oWa,
&iN--~}!$
public static void sort(int[] data) { 79zJ\B_
sort(data, IMPROVED_QUICK); wV?,Z!\Z
} 3M5#4n\v$
private static String[] name={ }U@m*dEG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UDf9FnG}L
}; c= UU"
bg|!'1bD`5
private static Sort[] impl=new Sort[]{ sqx`">R
new InsertSort(), \Mv":Lm1
new BubbleSort(), dQezd-y*
new SelectionSort(), Y}6n]n;uR
new ShellSort(), }awzO#
new QuickSort(), %}2@rLP
new ImprovedQuickSort(), 4^6.~6a
new MergeSort(), 7dihVvL $
new ImprovedMergeSort(), QbhW!9(,
new HeapSort() DaNW~rd{
}; wo5ZxM
]IJRnVp%
public static String toString(int algorithm){ ^"8G`B$r
return name[algorithm-1]; 9Qj2W
} {#IPf0O
CeT~p6=
public static void sort(int[] data, int algorithm) { mq/zTm
impl[algorithm-1].sort(data); h72UwJ2rw
} A`O<6
*cWmS\h|
public static interface Sort { 0ZAj=u@O
public void sort(int[] data); ;%J5=f%z)
} F{k+7Ftc
Dj-s5pAW
public static void swap(int[] data, int i, int j) { [%HIbw J
int temp = data; ,]R8(bD)
data = data[j]; 3E} An%
data[j] = temp; 8:ggECD
} us?&:L|!=
} 4n 3Tp{Y}