[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; qfRH5)k
} 5 -RsnF
int i1=l; 6h,(wo3Y
int i2=mid+1; j@uOOhy
for(int cur=l;cur<=r;cur++){ e@* EzvO
if(i1==mid+1) p hzKm9
data[cur]=temp[i2++]; /9pwZ%:<
else if(i2>r) {w^+\]tC
data[cur]=temp[i1++]; dNL(G%Qj+"
else if(temp[i1] data[cur]=temp[i1++]; M>ruKHipFE
else {vyv7L
data[cur]=temp[i2++]; q6`b26
} q}#6e]t
} "v({,
~=RT*>G_
} @x'"~"%7b
[o+q>|q
改进后的归并排序: y0.8A-2:
.Cl:eu,]
package org.rut.util.algorithm.support; c*L\_Vx+
iq( E'`d
import org.rut.util.algorithm.SortUtil; EkNunCls
@? QoF#D
/** jeH~<t{
* @author treeroot .Blf5b
* @since 2006-2-2 L4z ~B!uvF
* @version 1.0 ww $
*/ qPy1;maXP
public class ImprovedMergeSort implements SortUtil.Sort { kN4{13Qs*
64G[|" j D
private static final int THRESHOLD = 10; k" PayyAC
?3zc=J"t
/* \VyZ
* (non-Javadoc) "8^ Ch{G-
* v)t:|Q{I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OJ5#4qJ[
*/ <;m<8RjX
public void sort(int[] data) { r@t9Ci=}
int[] temp=new int[data.length]; Mh/dpb\Z
mergeSort(data,temp,0,data.length-1); ,*hLFaR-
} pRIhFf
:^WKT
private void mergeSort(int[] data, int[] temp, int l, int r) { BB*f4z$Y%
int i, j, k; ~8P!XAU56%
int mid = (l + r) / 2; z(Pe,zES
if (l == r) .e=:RkI,
return; ADP%QTdqFJ
if ((mid - l) >= THRESHOLD) Et/\xL
mergeSort(data, temp, l, mid); @As[k2
else c[4i9I3v
insertSort(data, l, mid - l + 1); `e|0g"oP
if ((r - mid) > THRESHOLD) <vh/4
mergeSort(data, temp, mid + 1, r); kJzoFFWo$
else 6qoyiT%P&
insertSort(data, mid + 1, r - mid); [] `&vWZ
_'>oXQJ
for (i = l; i <= mid; i++) { ``Dq
temp = data; vAh6+K.e
} ,3p~w5C/+[
for (j = 1; j <= r - mid; j++) { BJsz2t :0
temp[r - j + 1] = data[j + mid]; W;L7SF g)
} C|).;V&
int a = temp[l]; 1&)?JZhg
int b = temp[r]; nvJf/90$
for (i = l, j = r, k = l; k <= r; k++) { ]?+p5;{y4
if (a < b) { !K}~/9Z=m
data[k] = temp[i++]; (ehK?6[
a = temp; `W:%mJd9
} else { >x+6{^}Q>
data[k] = temp[j--]; o` ZQd,3
b = temp[j]; Avd ^
} )d1_Wm#B
} ,PuL{%PXu
} r1.nTO%
zHL@i0>^
/** ICs\ z
* @param data %g$V\zmU
* @param l /VS[pXXT|
* @param i m~P CB_ifW
*/ V4P; 5[
private void insertSort(int[] data, int start, int len) { Gh}LlX!w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y*>#T
} 5JCG2jqx0
} y8L D7<1u
} wrbLDod /
} Z&4&-RCi
WDc+6/<
堆排序： EQ`(yj
{G}.b)9FG
package org.rut.util.algorithm.support; 0Lc9M-Lg
Lz!,kwg
import org.rut.util.algorithm.SortUtil; Fzpfoz<N
D@|W<i-
/** jR22t`4
* @author treeroot ^ZhG>L*
* @since 2006-2-2 GCX G/k?w:
* @version 1.0 E4W -hq~
*/ 2FF4W54I
public class HeapSort implements SortUtil.Sort{ 8:>1F,
u7[ykyV
/* (non-Javadoc) v:o({Y 1Aq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H!nr^l'+
*/ ~Ro9up
public void sort(int[] data) { n'01Hh`0
MaxHeap h=new MaxHeap(); #qI= Z0Y
h.init(data); LbG_z =A
for(int i=0;i h.remove(); TUDr\' @/f
System.arraycopy(h.queue,1,data,0,data.length); Fpa;^F
} j!4et;
'0uhD.|G
private static class MaxHeap{ ]*FVz$>XM
[}8|R0KF
void init(int[] data){ *@Y3oh}S
this.queue=new int[data.length+1]; ,(?po(']
for(int i=0;i queue[++size]=data; 2 :mn</z
fixUp(size); kRD%b[*d
} H nUYqhZS
} GXjfQ~<]
L19C<5>
private int size=0; ?jt}*q>X]
*l;B\=KR
private int[] queue; x.zbD8l/9
1~ t{aLPz
public int get() { =ng\ 9y[;D
return queue[1]; ks97k8B
} 80&.JP.
TJ'[--
public void remove() { +$(2:S*r
SortUtil.swap(queue,1,size--); K+8-9$w6
fixDown(1); Q7C;1aO
} 4*mS y
file://fixdown 6{+{lBm=y
private void fixDown(int k) { _5m#2u51i
int j; w'fT=v)
while ((j = k << 1) <= size) { DUe&r,(4O
if (j < size %26amp;%26amp; queue[j] j++; 0i|oYaC
if (queue[k]>queue[j]) file://不用交换 rBTeb0i?
break; C2xL1`
SortUtil.swap(queue,j,k); )+"'oY$]}
k = j; |t)}VM%
} !x>%+&c>k
} T?1Du"d8
private void fixUp(int k) { lGk{LO)
while (k > 1) { _uKZMl
int j = k >> 1; dT$M y`>
if (queue[j]>queue[k]) f1)x5N
break; V$icWu
SortUtil.swap(queue,j,k); D8nD/||;Z
k = j; 5qkH|*Z3
} jfx8EbQ
} g'u?Rn7*J
<[J[idY1he
} -,aeM~
RQp|T5Er*
} !>`N$-U X
<ggtjw S
SortUtil： !!V#v9{
#gaQaUjR
package org.rut.util.algorithm; G0{H5_h
{}m PEd b
import org.rut.util.algorithm.support.BubbleSort; f\1A!Yp
import org.rut.util.algorithm.support.HeapSort; e)IpPTj#
import org.rut.util.algorithm.support.ImprovedMergeSort; ym/fFm6h
import org.rut.util.algorithm.support.ImprovedQuickSort; Q33"u/-v
import org.rut.util.algorithm.support.InsertSort; %#Z/2<_
import org.rut.util.algorithm.support.MergeSort; lR`'e0Lq
import org.rut.util.algorithm.support.QuickSort; ]I.n\2R]om
import org.rut.util.algorithm.support.SelectionSort; d90Z,nex
import org.rut.util.algorithm.support.ShellSort; 7GSV
G #T<`>T
/** B_l{<
* @author treeroot m6yIR6H
* @since 2006-2-2 8W+gl=C~
* @version 1.0 +"}=d3E6
*/ q4$+H{xB
public class SortUtil { F3lw@b3])
public final static int INSERT = 1; Z,;cCxE
public final static int BUBBLE = 2; 'snn~{hG
public final static int SELECTION = 3; -l-E_6|/W
public final static int SHELL = 4; u!U"N*Y"
public final static int QUICK = 5; Af5D>/
public final static int IMPROVED_QUICK = 6; {[t`j+J
public final static int MERGE = 7; :!f(F9
public final static int IMPROVED_MERGE = 8; q$.{j"cZV
public final static int HEAP = 9; dg7=X{=9jv
KZe)K_1[
public static void sort(int[] data) { tYqs~B3
sort(data, IMPROVED_QUICK); h~,JdDV8l*
} qr50E[
private static String[] name={ ORWm C!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [;oCYb$9
}; BtdXv4V
!epgTN
private static Sort[] impl=new Sort[]{ CG&`16KN7
new InsertSort(), %T=A{<[`
new BubbleSort(), \#x}q'BC4
new SelectionSort(), @l(vYJ:f
new ShellSort(), x/MZ(A%D
new QuickSort(), ^D_/=4rz8
new ImprovedQuickSort(), *Sf-;U
new MergeSort(), <n\`d
new ImprovedMergeSort(), YEx)"t8E
new HeapSort() "$5\,
}; `}no9$l~
Hj1 EGCA
public static String toString(int algorithm){ PaCzr5!~f
return name[algorithm-1]; jSQ9.%4
} 5NXt$k5
qG9+/u)\
public static void sort(int[] data, int algorithm) { F{\gc|!i
impl[algorithm-1].sort(data); 0ZPV'`KGp
} 9kY[j2,+
8g7,2f/ }
public static interface Sort { kK~IwA
public void sort(int[] data); )W&>[B
} A?"h@-~2
HT_TP q
public static void swap(int[] data, int i, int j) { )I@L+
int temp = data; $H'X V"<o
data = data[j]; =FBpo2^QB;
data[j] = temp; qkP/Nl. u
} /WnE:3G
} ]y)Q!J )Q