[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; Q)Q1a;o
} |Pi! UZB
int i1=l; xO&qo8*
int i2=mid+1; -CLBf'a
for(int cur=l;cur<=r;cur++){ c<,R,DR
if(i1==mid+1) u~7fK
data[cur]=temp[i2++]; E<sd\~~A:
else if(i2>r) JA~q}C7A7o
data[cur]=temp[i1++]; Y49&EQ
else if(temp[i1] data[cur]=temp[i1++]; N;gY5;0m
else aM+Am,n`@
data[cur]=temp[i2++]; B *%ey?
} )kDB*(?
} nrg$V>pD
d9up! k
} QJ+Ml
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改进后的归并排序: M $f6.j
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package org.rut.util.algorithm.support; eZBC@y
h@PE:=
import org.rut.util.algorithm.SortUtil; Ot`znJU@
jN-!1O._G
/** AQwai>eL
* @author treeroot |k^C-
* @since 2006-2-2 1gQ_76Yck
* @version 1.0 #I1q,fm
*/ >t{-_4Yv?
public class ImprovedMergeSort implements SortUtil.Sort { #>6Jsnv1
X0Wx\xDg[
private static final int THRESHOLD = 10; R@){=8%z
dhjX[7Bl9
/* SY.ZEJcv
* (non-Javadoc) Qk >9o
* Vh?RlIUA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WPAT\Al&AE
*/ ne: 'aq
public void sort(int[] data) { vi28u xc
int[] temp=new int[data.length]; ZUkM8M$c
mergeSort(data,temp,0,data.length-1); C_Z/7x*>d
} 3Ak'Ue
;Yt+{pI
private void mergeSort(int[] data, int[] temp, int l, int r) { [bw1!X3
int i, j, k; n?;h-KKO:
int mid = (l + r) / 2; SlG^ H
if (l == r) j WSgO(y
return; }Ogb|8
if ((mid - l) >= THRESHOLD) JIIc4fyy8s
mergeSort(data, temp, l, mid); hpgOsF9Lh
else <4n"LJ9
insertSort(data, l, mid - l + 1); 6_:I~TTX
if ((r - mid) > THRESHOLD) 9khMG$
mergeSort(data, temp, mid + 1, r); [(eX\kL
else 1_};!5$.
insertSort(data, mid + 1, r - mid); -y>~ :.
<<b]v I
for (i = l; i <= mid; i++) { +#\7 #Y
temp = data; ex BLj *]
} ?GlXxx=eV
for (j = 1; j <= r - mid; j++) { Si@6'sw
temp[r - j + 1] = data[j + mid]; N\];{pe>
} TB-dV'w
int a = temp[l]; XhA tf@n
int b = temp[r]; I{h KN V
for (i = l, j = r, k = l; k <= r; k++) { 0' oXA'L-J
if (a < b) { Y'5(exW
data[k] = temp[i++]; KaX*) P
a = temp; Paeq
} else { s/.P/g%tA>
data[k] = temp[j--]; N6v?Qzvi
b = temp[j]; cg o
} &>B"/z
} 8Ihl}aguW
} jZC[_p;
IJt'[&D
/** d14n>
* @param data G$2@N6
* @param l Oxa8ue?
* @param i >cLh$;l
*/ no W]E}nN
private void insertSort(int[] data, int start, int len) { |}.}q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zvVo-{6
} t0GJ$])
} hNhEA $X5
} { 0-on"o
} %<!YjJ
z:$ibk4#h
堆排序： )P>/g*
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package org.rut.util.algorithm.support; !l=)$RJKdD
YCQ$X
import org.rut.util.algorithm.SortUtil; uT'l.*W6i
rwVp}H G
/** e#,(a
* @author treeroot JXMH7
* @since 2006-2-2 lx=tOfj8
* @version 1.0 ]%y>l j?Y
*/ *c [^/
public class HeapSort implements SortUtil.Sort{ ma+AFCi
~\AF\n%
/* (non-Javadoc) UfPHV%Wd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gw\..O
*/ A*wf: mW0c
public void sort(int[] data) { &^#u=w?^x
MaxHeap h=new MaxHeap(); <e?Eva%t`
h.init(data); 8Y.9%@
for(int i=0;i h.remove(); $XTtDUP@
System.arraycopy(h.queue,1,data,0,data.length); jz![#-G
} g&85L$
KN[;z2i
private static class MaxHeap{ !yxqOT-
ZZ!">AN`^
void init(int[] data){ 8I*N
this.queue=new int[data.length+1]; *m^\&
for(int i=0;i queue[++size]=data; vy*-"=J
fixUp(size); D4,>g )B
} #CaPj:>[
} PkI+z_
v&'#Gg
private int size=0; q[C?1Kc.z
9O:l0 l
private int[] queue; x(vQ%JC
g27'il
public int get() { 9aY8`B
return queue[1]; mHHlm<?]
} nvT@'y+
)t"-#$,@
public void remove() { IlB8~{p_
SortUtil.swap(queue,1,size--); L/r_MtN
fixDown(1); P3: t 4^
} Hj|&P/jY]*
file://fixdown 4&;iORw&E4
private void fixDown(int k) { jT=|!,Pn
int j; l"%80"zO
while ((j = k << 1) <= size) { iGu%_-S
if (j < size %26amp;%26amp; queue[j] j++; Wz s=BNm9
if (queue[k]>queue[j]) file://不用交换 eF22 ~P
break; cl2_"O
SortUtil.swap(queue,j,k); Y55u-9|N
k = j; UJSIbb5
} _OTVQo Ap
} Bskp&NV':
private void fixUp(int k) { Tk4>Jb
while (k > 1) { Lr D@QBT
int j = k >> 1; j}eb _K+I
if (queue[j]>queue[k]) DkEv1]6JI_
break; L;%w{,Ji
SortUtil.swap(queue,j,k); ~(ke'`gJ0-
k = j; G:":CX"O(
} 5EcVW|(
} UGI<V!
wCB*v<*
} v={{$=/t
~}}<+JEEO
} 1.F&gP)9
rBNVI;JZW
SortUtil： o#e8 Piw
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package org.rut.util.algorithm; ]*\MIz{56'
hj9TiH/+
import org.rut.util.algorithm.support.BubbleSort; Td|u@l4B
import org.rut.util.algorithm.support.HeapSort; GQn:lu3j:
import org.rut.util.algorithm.support.ImprovedMergeSort; %7)TiT4V
import org.rut.util.algorithm.support.ImprovedQuickSort; 3X`9&0:j%
import org.rut.util.algorithm.support.InsertSort; v}6iI}r
import org.rut.util.algorithm.support.MergeSort; )x7n-|y6
import org.rut.util.algorithm.support.QuickSort; 0bDc 4m
import org.rut.util.algorithm.support.SelectionSort; \X:e9~
import org.rut.util.algorithm.support.ShellSort; oT):#,s
M}x%'=Pox
/** **Ioy+
* @author treeroot iVI&
* @since 2006-2-2 %S^hqC
* @version 1.0 05q760I+
*/ bGH#s {'5
public class SortUtil { j)mU`b_
public final static int INSERT = 1; A~bSB n: '
public final static int BUBBLE = 2; _|#abLh%
public final static int SELECTION = 3; N3|:MMl
public final static int SHELL = 4; lx%c&~.DiB
public final static int QUICK = 5; -[L\:'Gp5
public final static int IMPROVED_QUICK = 6; tF`L]1r>
public final static int MERGE = 7; F,wB6Cw
public final static int IMPROVED_MERGE = 8; 'F/oR/4,
public final static int HEAP = 9; h#hr'3bI1
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public static void sort(int[] data) { {r&mNbz
sort(data, IMPROVED_QUICK); 6:#o0OeBP
} K=[7<b,:3
private static String[] name={ tb+gCs'D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h9H z6 >
}; 5qtk#FB
j%Au0k
private static Sort[] impl=new Sort[]{ rUb{iU;~m
new InsertSort(), lPR=C0h}@
new BubbleSort(), szsVk#p
new SelectionSort(), 9&eY<'MgP
new ShellSort(), c`!e#w
new QuickSort(), \34vE@V*
new ImprovedQuickSort(), @ep.wW
new MergeSort(), N>H@vt~
new ImprovedMergeSort(), STW?0B'Jr
new HeapSort() Ay?<~)H
}; rv*{[K
L3, /7
public static String toString(int algorithm){ c| ^I}
return name[algorithm-1]; SsZC g#i
} ?Ij(B}D
T7,]^ 1
public static void sort(int[] data, int algorithm) { `MOw\Z)..
impl[algorithm-1].sort(data); M*zpl}
} @sLN
+#FqC/`l
public static interface Sort { 7 m{lOR
public void sort(int[] data); !cyrt<
} '? 5-
^5sA*%T4
public static void swap(int[] data, int i, int j) { PXMd=,}
int temp = data; w.?4}'DK
data = data[j]; vhfjZ
data[j] = temp; MYS`@%ZV#k
} w \b+OW
} wXQxZuk[