[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; # %'%LY=
} RRzLQ7J
int i1=l; ~#)9Kl7<X
int i2=mid+1; bJkFCI/
for(int cur=l;cur<=r;cur++){ rrq7UJ;
if(i1==mid+1) k(v &+v
data[cur]=temp[i2++]; Do5{t'm3
else if(i2>r) i[w&!mn%
data[cur]=temp[i1++]; 54/ZGaonz
else if(temp[i1] data[cur]=temp[i1++]; j^eMi
else qk>M~,
data[cur]=temp[i2++]; t;:Yf
} $Rn9*OKr
} C;#gy-
P7REE_<1
} }=.C~f]A
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改进后的归并排序: c{39,oF
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package org.rut.util.algorithm.support; )q/brCq
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import org.rut.util.algorithm.SortUtil; |CK/-UG}
)Y"t$Iw"
/** V343IT\
* @author treeroot NE3/>5
* @since 2006-2-2 Yp8XZ3
* @version 1.0 =$ubSfx
*/ NxB/U_j
public class ImprovedMergeSort implements SortUtil.Sort { |uX&T`7?-
4{b/Nv:b
private static final int THRESHOLD = 10; Uo[`AzD3
;<%d^
/* i98PlAq)B
* (non-Javadoc) +eop4 |Z
* y+izC+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A2Iqn5
*/ T(k:\z/
public void sort(int[] data) { L Z3=K`gj
int[] temp=new int[data.length]; >feeVk
mergeSort(data,temp,0,data.length-1); z5sKV7&\[n
} -qLNs_ _k
z^y -A?
private void mergeSort(int[] data, int[] temp, int l, int r) { O<XNI(@
int i, j, k; 6+C]rEY/o
int mid = (l + r) / 2; db3.X~Cn#s
if (l == r) 'lgS)m
return; W;U<,g '
if ((mid - l) >= THRESHOLD) N'|9rB2e
mergeSort(data, temp, l, mid); ZJ[p7XP
else 0 4oMgH>Vd
insertSort(data, l, mid - l + 1); 5p/.( |b,
if ((r - mid) > THRESHOLD) 5z" X>!?^
mergeSort(data, temp, mid + 1, r); ^Nysx ~6
else "tj]mij2)G
insertSort(data, mid + 1, r - mid); [.;8GMW
clM6R
for (i = l; i <= mid; i++) { [kPl7[OL
temp = data; h9~oS/%:
} ;:bnLSPo
for (j = 1; j <= r - mid; j++) { $us7fuKE
temp[r - j + 1] = data[j + mid]; lH"VLO2l
} 1W9uWkk_d
int a = temp[l]; <u
int b = temp[r]; D@k#'KU
for (i = l, j = r, k = l; k <= r; k++) { '2{60t_A
if (a < b) { ntZHO}'
data[k] = temp[i++]; a!PN`N28
a = temp; 8Z 0@-8vi
} else { )1O|+m k
data[k] = temp[j--]; 8{Vt8>4
b = temp[j]; 9v7}[`^
} >-(,BfZ
} B;Co`o2
} AQc9@3T~Bi
:r&4/sN}<
/** V<d`.9*}
* @param data X"T)X#:)
* @param l qf%p#+:B3
* @param i VZ2CWE)t
*/ / 6DW+!
private void insertSort(int[] data, int start, int len) { 1#2L9Bi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1\5po^Oioy
} ZPHatC
} xJFxrG'c
} E FBvi
} "h&[6-0'
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堆排序： <h`}I3Ao
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package org.rut.util.algorithm.support; T`Xz*\}Zb
>~T2MlRux
import org.rut.util.algorithm.SortUtil; [kI[qByf
,4(m.P10
/** WX$AOnEv
* @author treeroot ?nf4K/IjZ!
* @since 2006-2-2 }/7rA)_
* @version 1.0 ?6:e%YT
*/ jf& oN]sZ
public class HeapSort implements SortUtil.Sort{ m .^WSy
~vfPsaRh
/* (non-Javadoc) M7neOQHq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u/5)Yx+5_
*/ ]yas]5H
public void sort(int[] data) { DWU(ld:_
MaxHeap h=new MaxHeap(); yuF\YOA9
h.init(data); Kq:vTz&<
for(int i=0;i h.remove(); '8|joj>G=
System.arraycopy(h.queue,1,data,0,data.length); f5.Be%
} Vv>hr+e
A&Cs (e
private static class MaxHeap{ u"kB`||(
%v]-:5g'|
void init(int[] data){ ' h|d-p\`9
this.queue=new int[data.length+1]; =%+xNOdN7?
for(int i=0;i queue[++size]=data; L#/<y{
fixUp(size); ,*;g+[Bhpl
} ~&+8m=
} 4TaHS!9
szy2"~hm
private int size=0; {CGk9g"`
'Y>@t6E4
private int[] queue; ,^qHl+'
N\zUQ J
public int get() { sQT<I]e
return queue[1]; RIF*9=,S
} <J^94-[CF
DXfQy6k'
public void remove() { wPpern05
SortUtil.swap(queue,1,size--); 3:gF4(.
fixDown(1); `W4Is~VVv
} 6yMaW eT
file://fixdown #M:Vwn JX
private void fixDown(int k) { ^~m}(6
int j; ;7g~4Uv4}
while ((j = k << 1) <= size) { BU%gXr4Ra
if (j < size %26amp;%26amp; queue[j] j++; Gk<6+.c~
if (queue[k]>queue[j]) file://不用交换 |TuFx=~5v
break; "%+9p6/
SortUtil.swap(queue,j,k); \0^Je>-:U
k = j; !A"-9OS2
} ^L's45&_
} \-:4TuU
private void fixUp(int k) { 'zYx4&s
while (k > 1) { rF . Oo0
int j = k >> 1; D}bCMN<
if (queue[j]>queue[k]) q_0,KOGW
break; a8Z{-=)
SortUtil.swap(queue,j,k); WD#7Q&T(;
k = j; @Y+9")?
} *g 2N&U
} {7 nz:f
R,W w/D
} Br"K{g?
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} hu-6V="^9
h) W|~y@
SortUtil： J|dj`Z?
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package org.rut.util.algorithm; H`8}w{ft&
rh6m
import org.rut.util.algorithm.support.BubbleSort; Ert` ]s~
import org.rut.util.algorithm.support.HeapSort; DgC;1U'
import org.rut.util.algorithm.support.ImprovedMergeSort; W/<C$T4
import org.rut.util.algorithm.support.ImprovedQuickSort; 93y!x}
import org.rut.util.algorithm.support.InsertSort; lhJZPnx~
import org.rut.util.algorithm.support.MergeSort; &y:SK)
import org.rut.util.algorithm.support.QuickSort; 6>/g`%`N
import org.rut.util.algorithm.support.SelectionSort; +rOd0?
import org.rut.util.algorithm.support.ShellSort; 6ieP` bct
'E#Bz"T
/** x5W. 3*
* @author treeroot !a9/8U_>XF
* @since 2006-2-2 E%\Ohs7
* @version 1.0 >/DlxYG?
*/ IVSd,AR7yY
public class SortUtil { YW^sf,zQ
public final static int INSERT = 1; %ZJ;>a#
public final static int BUBBLE = 2; ~.8p8\H
public final static int SELECTION = 3; 1Ozy;;\-9
public final static int SHELL = 4; + Scw;gO
public final static int QUICK = 5; R(DlJ
public final static int IMPROVED_QUICK = 6; Z=>#|pW,)
public final static int MERGE = 7; [xg&`x9,.
public final static int IMPROVED_MERGE = 8; IHNl`\Le
public final static int HEAP = 9; J, vEZT<Mt
6?KJ"Ai9
public static void sort(int[] data) { B}Sl1)E
sort(data, IMPROVED_QUICK); VY'1 $
} z<n&P7k5j
private static String[] name={ "TePO7^m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SFa~j)9'n
}; kV+O|9
PkxhR;4
private static Sort[] impl=new Sort[]{ r WPoR/M
new InsertSort(), x<[W9Z'~?9
new BubbleSort(), Y%)@)$sK
new SelectionSort(), [V.#w|n
new ShellSort(), )nA fT0()0
new QuickSort(), _9b;8%?Yf
new ImprovedQuickSort(), ?DKwKt
new MergeSort(), SHP_
new ImprovedMergeSort(), y4~;H{!
new HeapSort() wdTjJfr
}; Ce_ES.
B&c*KaK;~
public static String toString(int algorithm){ 44(l1xEN+
return name[algorithm-1]; *9xv0hRQ%?
} j_HwR9^fd,
W\JwEb9Y
public static void sort(int[] data, int algorithm) { /|2 hW`G
impl[algorithm-1].sort(data); cSs??i D"q
} hQ}B?'>
N?krlR
public static interface Sort { @F0+t;
public void sort(int[] data); U<mFwJ C]
} @b"J FB|
%oqC5O6
public static void swap(int[] data, int i, int j) { 6$*ZH*
int temp = data; v6`TbIq%
data = data[j]; #&ZwQw
data[j] = temp; 2';f8JLY
} .@(9v.:_u
} W=@]YI