[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; G %#us3x
} I)Y$?"
int i1=l; ZnJnjW PQ
int i2=mid+1; W B!$qie\
for(int cur=l;cur<=r;cur++){ VS}Vl
if(i1==mid+1) 0\h2&
data[cur]=temp[i2++]; u*9C(je
else if(i2>r) RuXK` ySv
data[cur]=temp[i1++]; Cog:6Gnw
else if(temp[i1] data[cur]=temp[i1++]; -Z;:_"&9
else 2XI%4
data[cur]=temp[i2++]; |/<iydP
} Uc6U!X
} ED$gnFa3I
AVcZ.+?
} \4vFEJSh
t 1&p> v
改进后的归并排序: db4&?55Q
' l!QGKz
package org.rut.util.algorithm.support; yqBu7E$X
*}v'y{;
import org.rut.util.algorithm.SortUtil; _n_i*p '2
Awr]@%I
/** u#P7~9ZG-
* @author treeroot v(t&8)Uu
* @since 2006-2-2 t*<c+Ixu
* @version 1.0 Qy$QOtrv
*/ "Km`B1f`
public class ImprovedMergeSort implements SortUtil.Sort { 1u`Z?S(
@+2Zt%
private static final int THRESHOLD = 10; u(~s$ENl
D=OU61AA
/* $`5DGy?RU
* (non-Javadoc) A9R}74e4g
* utTek5/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zg'[.wov
*/ Zn^E
public void sort(int[] data) { -5qO}^i$a
int[] temp=new int[data.length]; `C()H@;
mergeSort(data,temp,0,data.length-1); asJYGqdF
} >Y,7>ahyt
vx4& ;2
private void mergeSort(int[] data, int[] temp, int l, int r) { 3dM6zOK
int i, j, k; Kr#=u~~M
int mid = (l + r) / 2; c49#aNR
if (l == r) K)v(Z"
return; ]MHQ"E?
if ((mid - l) >= THRESHOLD) IX>|bA;
mergeSort(data, temp, l, mid); q{@Wn]!k
else :C&?(HJ&r
insertSort(data, l, mid - l + 1); dqe_&C@*O
if ((r - mid) > THRESHOLD) DTJ
mergeSort(data, temp, mid + 1, r); Rsulp#['
else jab]!eY
insertSort(data, mid + 1, r - mid); P``hw=L
>YW>=5_
for (i = l; i <= mid; i++) { PU>;4l
temp = data; 4a 5n*6G!
} h}oQr0"c
for (j = 1; j <= r - mid; j++) { \x+DEy'4;5
temp[r - j + 1] = data[j + mid]; lt*k(JD
} =MXF`k^}
int a = temp[l]; M&K@><6k,k
int b = temp[r]; mSzwx/3"
for (i = l, j = r, k = l; k <= r; k++) { _5)#{o<
if (a < b) { ~U1iB
data[k] = temp[i++]; V.4j?\#%
a = temp; =UV?Pi*M>
} else { <|8l;
data[k] = temp[j--]; %pt$S~j
b = temp[j]; GWhZ Mj
} w(yU\ N
} Ao\Vh\rQkq
} =.%ZF]Oe+#
sH]AB=_
/** `~RV
* @param data ? vlGr5#
* @param l ~L1O\V i
* @param i ZChY:I$<
*/ !vB%Q$!x
private void insertSort(int[] data, int start, int len) { .~8+s.y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z>{KeX:
} yI%> w4Z
} <8bO1t^*
} GKSy|z
} qh'BrYu*
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堆排序： 2%8Y-o?
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package org.rut.util.algorithm.support; >(CoXSV5
n96gDH*
import org.rut.util.algorithm.SortUtil; )eEvyU
OT[m g4&
/** Z)A+ wM
* @author treeroot L8zqLDi&
* @since 2006-2-2 StL[\9~:
* @version 1.0 <f6PULm
*/ Ib\G{$r
public class HeapSort implements SortUtil.Sort{ @e,Zmx
xdM#>z`;
/* (non-Javadoc) {t:ND
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bg h$P
*/ \.a .'l
public void sort(int[] data) { ~K96y$ DTE
MaxHeap h=new MaxHeap(); LPn}QzH
h.init(data); cQ41NX@I
for(int i=0;i h.remove(); X-,y[ )
System.arraycopy(h.queue,1,data,0,data.length); 5ecz'eA%
} 2S6EDXc
+-\9'Q
private static class MaxHeap{ I0vnd7
5#)<rK
void init(int[] data){ ,rI |+
this.queue=new int[data.length+1]; ebe@.ZVSi
for(int i=0;i queue[++size]=data; b6Hk20+B;
fixUp(size); .K1E1Z_
} $jm<' 4
} xg^^@o
yn[ZN-H~
private int size=0; @!/fvP
~&lJT
private int[] queue; /7@2Qc2
(I ds<n"
public int get() { jgKL88J*\
return queue[1]; idS RWa
} ]3,.g)U*m
}!]x|zU.=
public void remove() { YIQ]]q8R!L
SortUtil.swap(queue,1,size--); xO-U]%oq
fixDown(1); ;T{/;
} So*Wk "
file://fixdown yLO &(Mb
private void fixDown(int k) { wv.Ulrpx.
int j; ,."(Gp
while ((j = k << 1) <= size) { Y0yO`W4
if (j < size %26amp;%26amp; queue[j] j++; .S'fM]_#
if (queue[k]>queue[j]) file://不用交换 )R)$T'
break; u%1k
SortUtil.swap(queue,j,k); $%%>n^??
k = j; N3yB1_
} Qy^z*s
} #G+
private void fixUp(int k) { k?/vy9
while (k > 1) { #O9*$eMw
int j = k >> 1; h@,e`Z
if (queue[j]>queue[k]) *Iwk47J ;a
break; e9`uD|KAS|
SortUtil.swap(queue,j,k); "-QRkif
k = j; r d6F"W
} Q P=[ Vw
} 5\w=(c9A
uH&,%k9GVK
} Z0ncN])
-RH4y 2
} RCh$j&Tn
j[/SXF\=
SortUtil： @nx}6?p\,
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package org.rut.util.algorithm; CaYos;Pl
hD$p;LF
import org.rut.util.algorithm.support.BubbleSort; Z6R: rq
import org.rut.util.algorithm.support.HeapSort; Z<N&UFw7QJ
import org.rut.util.algorithm.support.ImprovedMergeSort; " _:iK]
import org.rut.util.algorithm.support.ImprovedQuickSort; up&NCX
import org.rut.util.algorithm.support.InsertSort; <E[HlL
import org.rut.util.algorithm.support.MergeSort; (~G5t(+
import org.rut.util.algorithm.support.QuickSort; :otY;n-
import org.rut.util.algorithm.support.SelectionSort; :m*!?QGdL
import org.rut.util.algorithm.support.ShellSort; MvZ+n
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/** hY.e[+
* @author treeroot 1 ;\]D9i
* @since 2006-2-2 :Hzz{'
* @version 1.0 T/GgF&i3
*/ nIyROhZ
public class SortUtil { N)y^</Ya
public final static int INSERT = 1; :F^$"~(,
public final static int BUBBLE = 2; YN%=Oq
public final static int SELECTION = 3; QiTR-M2C!
public final static int SHELL = 4; s;B j7]
public final static int QUICK = 5; R3B5-^s
public final static int IMPROVED_QUICK = 6; qGpP,
public final static int MERGE = 7; S,*{q(
public final static int IMPROVED_MERGE = 8; nDHHYp
public final static int HEAP = 9; 5)d,G9
#Mj$o;SX
public static void sort(int[] data) { >JKnGeF
sort(data, IMPROVED_QUICK); JrCf,?L^
} (s}Rj)V[^
private static String[] name={ k9}Q7)@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {D_++^
}; 'Q:i&dTg
qri}=du&F
private static Sort[] impl=new Sort[]{ HGO#e
new InsertSort(), 2BoFyL*
new BubbleSort(), 3]O`[P,*%
new SelectionSort(), (3 IZ
new ShellSort(), <|{L[
new QuickSort(), e[x?6He,$
new ImprovedQuickSort(), /=8O&1=D
new MergeSort(), w^06z,
new ImprovedMergeSort(), .S~@BI(|<
new HeapSort() K0tV'Ml#"
}; PD6MyW05%9
o3Mf:;2cC
public static String toString(int algorithm){ K :1g"
return name[algorithm-1]; /xl4ohL$a
} h&)fu{
b;S6'7Jf9
public static void sort(int[] data, int algorithm) { JB&G~7Q85
impl[algorithm-1].sort(data); a?5WKO
} v1LKU
3>RcWy;1i
public static interface Sort { $Mdbto~<
public void sort(int[] data); "6?lQw e
} %tT"`%(+
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public static void swap(int[] data, int i, int j) { 1TKEm9j]u
int temp = data; V?OuIg%=:
data = data[j]; +"jl(5Q
data[j] = temp; Z:K+I+:t
} 4HM;K_G%{
} cppL0myJ