[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; -H|!KnR
} YV>&v.x0;
int i1=l; d@b2XCh<K
int i2=mid+1; k$DRX)e
for(int cur=l;cur<=r;cur++){ Imclz4'8
if(i1==mid+1) &h7 n>q
data[cur]=temp[i2++]; b+f '
else if(i2>r) q& KNK
data[cur]=temp[i1++]; W?ghG
else if(temp[i1] data[cur]=temp[i1++]; O9ro{ k
else Pj BBXI1i
data[cur]=temp[i2++]; m0^~VK|
} C58B(Ndo
} u{D]Kc?n
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} :C0)[L
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改进后的归并排序: &arJe!K
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package org.rut.util.algorithm.support; _,e4?grP#
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import org.rut.util.algorithm.SortUtil; o,0 Z^"|
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/** 7,uD7R_
* @author treeroot [;:ocy
* @since 2006-2-2 lKqFuLHwF
* @version 1.0 "W9z>ezp
*/ i2[8^o`_
public class ImprovedMergeSort implements SortUtil.Sort { xnw'&E
+<B"g{dLuX
private static final int THRESHOLD = 10; Bw[#,_
&#.>-D{
/* pDhUD}1G
* (non-Javadoc) l!\~T"-7;:
* iVmy|ewd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lso%1M
*/ 9gIim
public void sort(int[] data) { 8&qtF.i-6
int[] temp=new int[data.length]; <KoOJMx(
mergeSort(data,temp,0,data.length-1); P/q] u
} XSh[#qJ
@s,kx.S
private void mergeSort(int[] data, int[] temp, int l, int r) { $ma@z0%8}
int i, j, k; /paZJ}Pr.
int mid = (l + r) / 2; [ThAvQ_$
if (l == r) 'coY`B; 8
return; 'jye*
if ((mid - l) >= THRESHOLD) EV|W:;Sg
mergeSort(data, temp, l, mid); yDRi
else ;Uy}(
insertSort(data, l, mid - l + 1); #v6<9>%
if ((r - mid) > THRESHOLD) \uJ+~db=
mergeSort(data, temp, mid + 1, r); 8~Pdr]5
else q; C6ID`
insertSort(data, mid + 1, r - mid); {qCFd
IQ xi@7%&
for (i = l; i <= mid; i++) { ]kO|kIs
temp = data; (/{bJt~b
} 3`NSSS
for (j = 1; j <= r - mid; j++) { Tv~Ho&LS
temp[r - j + 1] = data[j + mid]; ^D ;EbR
} 9}a&:QTHR
int a = temp[l]; M+lr [,c
int b = temp[r]; ;(K"w*
for (i = l, j = r, k = l; k <= r; k++) { J L1]auO*
if (a < b) { GSfU*@L3
data[k] = temp[i++]; >CHb;*U
a = temp; T?tZ?!6
} else { la^K|!|
data[k] = temp[j--]; z 8#{=e
b = temp[j]; Ip *8R]W
} Ev3,p`zS._
} 7m:TY>{
} {7_C|z:'p&
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/** -uhVw_qq#
* @param data .VohW=D3
* @param l |M18/{
* @param i QpS7nGev
*/ TS=U%)Ik
private void insertSort(int[] data, int start, int len) { ;sx4w!Y,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s'Qmrs a
} f=7[GZoDn
} NR%_&%qQA
} 6(ER$
} '#Do( U'
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堆排序： ]x%sX|Rj
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package org.rut.util.algorithm.support; us.IdG
kX)*:~*
import org.rut.util.algorithm.SortUtil; `v'yGsIV
W[>qiYf^b
/** 7=&+0@R#/d
* @author treeroot TFzk5
* @since 2006-2-2 b7gN|Hw5 H
* @version 1.0 Zvra >%
*/ 7Rc>LI* '
public class HeapSort implements SortUtil.Sort{ D'^UZZlI^I
.*z$vl
/* (non-Javadoc) V=YDqof
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SQ'%a-Mct
*/ uh>"TeOi
public void sort(int[] data) { Mq#Hi9SKY
MaxHeap h=new MaxHeap(); %:sP#BQM
h.init(data); ]K%d
for(int i=0;i h.remove(); #5iwDAw:|r
System.arraycopy(h.queue,1,data,0,data.length); !Fs<r)j
} /-(OJN5F^
0<^Qj.(9
private static class MaxHeap{ 0WyOORuK
<UTO\w%
void init(int[] data){ 7g%\+%F I
this.queue=new int[data.length+1]; S,a:H*Hf
for(int i=0;i queue[++size]=data; w$""])o,
fixUp(size); _lC0XDZ
} `(6cRT`Wp
} #/\Zo &V8
;*d?Qe:
private int size=0; :8N{;aui
s{42_O?,c
private int[] queue; nB/`~_9
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public int get() { 7ZUS
return queue[1]; FtDF}
} v+( P4fS
kovJ9
public void remove() { [fs.D /
SortUtil.swap(queue,1,size--); B3I0H6O
fixDown(1); >LB*5
} z$Qy<_l
file://fixdown Zq:c2/\c}
private void fixDown(int k) { nB}eJD|
int j; ke)<E98DC
while ((j = k << 1) <= size) { BHU=TK@GR
if (j < size %26amp;%26amp; queue[j] j++; n1b^o~agwC
if (queue[k]>queue[j]) file://不用交换 ~ cI`$kJ
break; >x ]{cb/m
SortUtil.swap(queue,j,k); *o<|^,R
k = j; v9Lf|FXo&
} iT+t
} *zdUCX
private void fixUp(int k) { P!{J28dj
while (k > 1) { .sb0|3&
int j = k >> 1; W'e{2u
if (queue[j]>queue[k]) 5D mSgP:
break; M7YbRl
SortUtil.swap(queue,j,k); *=Ma5J.
k = j; :z\||f
} wBEBj7(y
} 7Oi<_b
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} '"h}l`
;Q[E>j?w=
} 9j5B(_J^
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SortUtil： [I[*?9}$"
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package org.rut.util.algorithm; c]|Tg9AW
g9IIC5
import org.rut.util.algorithm.support.BubbleSort; fr8';Jm
import org.rut.util.algorithm.support.HeapSort; !|cM<}TF,
import org.rut.util.algorithm.support.ImprovedMergeSort; rY$wC%
import org.rut.util.algorithm.support.ImprovedQuickSort; SUL\|z`5
import org.rut.util.algorithm.support.InsertSort; .73sY5hdTN
import org.rut.util.algorithm.support.MergeSort; 9MbF:
import org.rut.util.algorithm.support.QuickSort; AR g]GV/L
import org.rut.util.algorithm.support.SelectionSort; 8sq0 BH
import org.rut.util.algorithm.support.ShellSort; T`c:16I
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/** )[=C@U
* @author treeroot _&]Gw, ~/i
* @since 2006-2-2 dx.Jv/Mb
* @version 1.0 Ia:M+20n
*/ Q{ {=
public class SortUtil { #.LI`nYA
public final static int INSERT = 1; X& XD2o"rt
public final static int BUBBLE = 2; gU?M/i2
public final static int SELECTION = 3; g$z6*bL
public final static int SHELL = 4; Ze?H
public final static int QUICK = 5; dX-j3lM:#
public final static int IMPROVED_QUICK = 6; K'[kl'
public final static int MERGE = 7; V)ITk\
public final static int IMPROVED_MERGE = 8; *QoQ$alHH
public final static int HEAP = 9; \3x+Z!
$6d5W=u$H
public static void sort(int[] data) { oYWHO<b
sort(data, IMPROVED_QUICK); =vL >&$
} 41+@!`z7
private static String[] name={ 5K=>x<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z0M|Bv9_
}; 02^Nf7DMR
O81'i2MJ9
private static Sort[] impl=new Sort[]{ uzS;&-nA
new InsertSort(), _iu^VK,}
new BubbleSort(), k?Njge6@
new SelectionSort(), u\f QaQV
new ShellSort(), k40`,;}9
new QuickSort(), ) LohB,?
new ImprovedQuickSort(), (7X^z&2
new MergeSort(), j<h0`v
new ImprovedMergeSort(), 1.nYT*
new HeapSort() R!>SN0
}; d\tA1&k71
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public static String toString(int algorithm){ 3+!G9T!
return name[algorithm-1]; 0uI=8j
} /@",5U#
LE g#W
public static void sort(int[] data, int algorithm) { uao#=]?)
impl[algorithm-1].sort(data); =!($=9
} {=+'3p
x(:alG%#
public static interface Sort { Kw`}hSE>o
public void sort(int[] data); ~Vc`AcWP
} Z_Y gV:jc
_ujhD
public static void swap(int[] data, int i, int j) { yz%o?%@
int temp = data; MO|8A18B
data = data[j]; )ZfbM|
data[j] = temp; t;t;+M|W
} n9k-OGJ
} W}WDj: