[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; bv"({:x
} Bm>(m{sX>
int i1=l; iEO2Bil]
int i2=mid+1; EB<tX`Wp
for(int cur=l;cur<=r;cur++){ f3|=T8"t
if(i1==mid+1) Q#bo!]H{t
data[cur]=temp[i2++]; 2_DtzY:=
else if(i2>r) Q*o4zW
data[cur]=temp[i1++]; !H.lVA
else if(temp[i1] data[cur]=temp[i1++]; GgZf6~b1J
else 9:5NX3"p
data[cur]=temp[i2++]; 3+PM_c)Y
} OtqLigt&l
} !-Q!/?
uT2cHzqKB
} ;8kfgpM_
@}RyW&1Z
改进后的归并排序: o: DnZN
#?|z&9
package org.rut.util.algorithm.support; 'v)+S;oB
S8<aq P
import org.rut.util.algorithm.SortUtil; \"j1fAD!
skArocs
/** RtEkd_2
* @author treeroot l'R`XGT
* @since 2006-2-2 88U
* @version 1.0 (jMp`4P
*/ N/.9Aj/h~&
public class ImprovedMergeSort implements SortUtil.Sort { GY :IORuA4
~<R~Q:T
private static final int THRESHOLD = 10; ai2}vR
7nIMIkT:
/* ZS;kCdL
* (non-Javadoc) ZXkAw sr
* AG=1TZI"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >qZRIDE5$
*/ %uMsXa
public void sort(int[] data) { y[eNM6p
int[] temp=new int[data.length]; M,lu)~H
mergeSort(data,temp,0,data.length-1); y5 +&P
} -v&srd^
}k~0R-m
private void mergeSort(int[] data, int[] temp, int l, int r) { ,PAKPX9v_F
int i, j, k; y['icGU6
int mid = (l + r) / 2; 3".W
if (l == r) >?xVr
return; '1*MiFxKq
if ((mid - l) >= THRESHOLD) Dne&YVF9V
mergeSort(data, temp, l, mid); <VPtbM@(m
else 1yf&ck1R
insertSort(data, l, mid - l + 1); H[oi? {L
if ((r - mid) > THRESHOLD) ?RyvM_(N6
mergeSort(data, temp, mid + 1, r); U:(t9NX b
else ?+_"2XY
insertSort(data, mid + 1, r - mid); Vngi8%YWp
_en8hi@Z
for (i = l; i <= mid; i++) { m 9Q{)?J7
temp = data; CiFbk&-g
} Ha\hQ'99
for (j = 1; j <= r - mid; j++) { Rh^$0Q*2
temp[r - j + 1] = data[j + mid]; 2|EoP-K7
} 5lbh "m=
int a = temp[l]; I}{eYXh
int b = temp[r]; 0U~JSmj:2K
for (i = l, j = r, k = l; k <= r; k++) { ]|(?i ,p
if (a < b) { RUO6Co-
data[k] = temp[i++]; y3GIR f;>
a = temp; !Zx>)V6.
} else { 7dIDKx
data[k] = temp[j--]; \:S8mDI^s
b = temp[j]; =#Jb9=zdR
} ?Ci\3)u,P
} m-]"I8[
} xCD+qP^
kE}Ib4]J
/** 1owoh,V6
* @param data 6ZJQ '9f
* @param l &bNj/n/
* @param i P nDZi
*/ P*Nl3?T
private void insertSort(int[] data, int start, int len) { %-.GyG$i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C2T,1=
} )c_ll;%
} _\zfXHp
} JKGZ0yn
} 9:>vl0
yo=d"*E4^
堆排序： mbK$Wp#
2 r)c?
package org.rut.util.algorithm.support; 3]Mx,u
zjS<e XLs[
import org.rut.util.algorithm.SortUtil; EWi@1PAZK
:yeTzIz]
/** ?T&D@Ohsx
* @author treeroot nNr3'6lz
* @since 2006-2-2 BH1To&ol
* @version 1.0 Kk#@8h>
*/ )sr]}S0
public class HeapSort implements SortUtil.Sort{ Qy%/+9L
:A[/;|&
/* (non-Javadoc) sQ$FtKm6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pD9c%P
*/ +J}M$eQ
public void sort(int[] data) { 8,Z0J
MaxHeap h=new MaxHeap(); 6Xa2A6
h.init(data); ))vwofkw4
for(int i=0;i h.remove(); l%O-c}X
System.arraycopy(h.queue,1,data,0,data.length); 3`y:W9!u
} iJK9-k~
I <7K^j+5:
private static class MaxHeap{ jdzV&
}\F>z
void init(int[] data){ \GN5Sy]r
this.queue=new int[data.length+1]; JqO( ]*"Hi
for(int i=0;i queue[++size]=data; $i hIHl6'
fixUp(size); C%&7,F7
} ))Nc|`
} 0#ph1a<
>_".
private int size=0; 5VN4A<))
"#()4.9
private int[] queue; ^/,s$dj
Us<lWEX;k
public int get() { XN Y(@
return queue[1]; *HVO
} a]*^uEs
x+&&[>-P
public void remove() { oj/tim
SortUtil.swap(queue,1,size--); xFJ>s-g*
fixDown(1); hf'3yEm
} X$aMf&x
file://fixdown )c*~Y=f
private void fixDown(int k) { <5.{+!BM
int j; ` mi!"pmw
while ((j = k << 1) <= size) { m-:k]9I
if (j < size %26amp;%26amp; queue[j] j++; Oj2[(7mO/
if (queue[k]>queue[j]) file://不用交换 TCYnErqk
break; (]JJ?aAF
SortUtil.swap(queue,j,k); %+.]>''a
k = j; S'WmPv
} SaNx;xgi
} $]vR,E
private void fixUp(int k) { {>:2Ff]O:
while (k > 1) { J]%P fWV
int j = k >> 1; `U1"WcN
if (queue[j]>queue[k]) 3ySnAAG
break; 3+Q6<MS q
SortUtil.swap(queue,j,k); IRQ(/:]
k = j; k $);<= ZI
} `>V.}K^4
} ZE9*i}r
OygYP
} F'K{=
1)%o:Xy o
} 9}4L8?2
qIk6S6
SortUtil： BdceINI
$6_J`7
package org.rut.util.algorithm; \6N\6=t!A
?TXFOr]g]2
import org.rut.util.algorithm.support.BubbleSort; bx@CzXre;
import org.rut.util.algorithm.support.HeapSort; e'jR<ln|
import org.rut.util.algorithm.support.ImprovedMergeSort; 2`z+_DA
import org.rut.util.algorithm.support.ImprovedQuickSort; -*WD.|k
import org.rut.util.algorithm.support.InsertSort; &,\S<B2.
import org.rut.util.algorithm.support.MergeSort; U;^{uQJ+,
import org.rut.util.algorithm.support.QuickSort; 3RD Q{&J:
import org.rut.util.algorithm.support.SelectionSort; `@ObM[0p(
import org.rut.util.algorithm.support.ShellSort; {>i'Pb0mG|
v4&*iT
/** 5W'T7asOh
* @author treeroot Mfgd;FsX#
* @since 2006-2-2 7SQu
* @version 1.0 B!5gD
*/ r4-r z+x
public class SortUtil { @a~K#Bvlm
public final static int INSERT = 1; h_cZ&P|
public final static int BUBBLE = 2; 0I.7I#'3O
public final static int SELECTION = 3; xGA%/dy,;
public final static int SHELL = 4; 1.uyu
public final static int QUICK = 5; 1*a2s2G '
public final static int IMPROVED_QUICK = 6; w<'mV^S
public final static int MERGE = 7; |h3YL!
public final static int IMPROVED_MERGE = 8; V7&L+]!
public final static int HEAP = 9; JsH9IK:
JeO(sj$e
public static void sort(int[] data) { )qKfTtN`
sort(data, IMPROVED_QUICK); n>@(gDq
} L0|u^J
private static String[] name={ rR7}SEa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m1(rAr1
}; 2sXWeiJy;
)'qZ6%
private static Sort[] impl=new Sort[]{ s^6S{XJ
new InsertSort(), +>s[w{Svy
new BubbleSort(), K <0ItNv
new SelectionSort(), p1Els/|
new ShellSort(), WUHijHo5(8
new QuickSort(), UE(%R1Py
new ImprovedQuickSort(), 9@!`,Co
new MergeSort(), b&!X#3(KT
new ImprovedMergeSort(), $idYG<],
new HeapSort() @)1u
}; Kj'uTEM
s Ce{V*ua
public static String toString(int algorithm){ HK}C<gg
return name[algorithm-1]; M[X& Q
} ,fL*yn
i |C'_gw`n
public static void sort(int[] data, int algorithm) { @P%&Dha
impl[algorithm-1].sort(data); S3 &L
} TEY%OIzU+
M*t{?o/t;
public static interface Sort { RhYf+?2
public void sort(int[] data); nlJxF5/
} s:Memvf
<Q%\pAP}b
public static void swap(int[] data, int i, int j) { $oh}!Smt
int temp = data; {| Tl3
data = data[j]; D].1X0^hp
data[j] = temp; w,^!kO0)~8
} _PJd1P.k
} b,s T[!X[