[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; Z)s !p
} hzsQK_;S
int i1=l; 2iG+Ek-?"
int i2=mid+1; )X0=z1$
for(int cur=l;cur<=r;cur++){ uu.X>agg
if(i1==mid+1) '4 *0Pw
data[cur]=temp[i2++]; <= o<lRU
else if(i2>r) L5bq\
data[cur]=temp[i1++]; SBreA-2
else if(temp[i1] data[cur]=temp[i1++]; FJc8g6M
else x/DV>Nfn
data[cur]=temp[i2++]; 8ttJ\m
} ]q1w@)]n}
} = LNU%0m
qWhW4$7x
} Y~vk>ZC
DyN[Yp|V
改进后的归并排序: X"!j_*&ED
#<xFO^TB
package org.rut.util.algorithm.support; k24I1DlR8
\J+a7N8m,
import org.rut.util.algorithm.SortUtil; ::>|[ND
X5iD<Lh
/** f'oTN!5WF
* @author treeroot g{V(WyT@
* @since 2006-2-2 p< 7rF_?W0
* @version 1.0 4Hz3KKu
*/ 4 neZw'm
public class ImprovedMergeSort implements SortUtil.Sort { ^ 8}P_
K1 "HJsj
private static final int THRESHOLD = 10; yMNJHiE/
K,g6y#1"
/* M{J>yN
* (non-Javadoc) g>VtPS5 y
* q-(~w!e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ni/s/^
*/ U4"^NLAq
public void sort(int[] data) { |8'}mjs.Q
int[] temp=new int[data.length]; v#?DWeaFS_
mergeSort(data,temp,0,data.length-1); ?{ )'O+s
} ;0dH@b
$mPR)T
private void mergeSort(int[] data, int[] temp, int l, int r) { M2Nh3ijr
int i, j, k; VeWh9:"bJ
int mid = (l + r) / 2; *:CTIV5N0
if (l == r) M7/5e3
return; H1k)ya x4_
if ((mid - l) >= THRESHOLD) -s0SQe{!_
mergeSort(data, temp, l, mid); zIF1A*UH
else %@PcQJg U<
insertSort(data, l, mid - l + 1); 4mDHAR%D
if ((r - mid) > THRESHOLD) `j{3|C=
mergeSort(data, temp, mid + 1, r); ~EBaVl ({
else 2H`r:x<Z-
insertSort(data, mid + 1, r - mid); (2;Aqx5i
PB^rniYh
for (i = l; i <= mid; i++) { w5i*pOG)Z
temp = data; #`_W?-%^
} K6->{!8]k
for (j = 1; j <= r - mid; j++) { jwk+&S
temp[r - j + 1] = data[j + mid]; 8XH;<z<oJ
} =8l' [
int a = temp[l]; k M/:n
int b = temp[r]; 0kUhz\"R:q
for (i = l, j = r, k = l; k <= r; k++) { wrkw,H
if (a < b) { P'Y(f!%
data[k] = temp[i++]; u0wu\
a = temp; 96\FJHtZ
} else { cIO/8D#zU
data[k] = temp[j--]; }@bp v
b = temp[j]; 2?ue.1C
} +O8[4zn&k
} OAkqPG&w
} GG#-x$jK
vE[d& b[
/** I;XM4a
* @param data XO;_F"H=
* @param l D\G 8p;
* @param i ()|e xWW
*/ aUMiRm-
private void insertSort(int[] data, int start, int len) { cUug}/!I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y;ey(
} c\.)vH
} F7}yt
} SVa^:\"$[
} glch06
bD v&;Z
堆排序： I]HYqI
(1=@.srAzK
package org.rut.util.algorithm.support; |Gq3pL<jkC
_oZ3n2v}@
import org.rut.util.algorithm.SortUtil; !IJ YaQ6z
r`ftflNh(
/** IYe[IHny1
* @author treeroot &DQ_qOKD
* @since 2006-2-2 [p4([ef '
* @version 1.0 rv{Wti[
*/ s {*rBX8N
public class HeapSort implements SortUtil.Sort{ -n@,r%`UK
.\`MoH
/* (non-Javadoc) tuH#Cy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BHpay
*/ &4wSX{c/P
public void sort(int[] data) { +sx(q@
MaxHeap h=new MaxHeap(); &(<Gr0
h.init(data); Mprn7=I{Tg
for(int i=0;i h.remove(); #: EhGlq8
System.arraycopy(h.queue,1,data,0,data.length); GfgHFv
} &x (D%+
k7JC~D E#
private static class MaxHeap{ =glG |
+ $M<ck?Bo
void init(int[] data){ XFFm'W6@
this.queue=new int[data.length+1]; +v%+E{F$+
for(int i=0;i queue[++size]=data; .5HD i-
fixUp(size); 9|jMN j]vo
} l/?bXNt
} MNh:NFCRA
?z. Z_A&
private int size=0; Z{u]qI{l
`m V(:
private int[] queue; bz:En'2>F
Eb,M+c?
public int get() { oVl:g:K40
return queue[1]; b 2\J<Nw
} eLH=PDdO
A _7I0^
public void remove() { G=e'H-
SortUtil.swap(queue,1,size--); "Ml#,kU<T
fixDown(1); ,H|K3nh
} pw))9~XU
file://fixdown s&%r?
private void fixDown(int k) { k-4z2qB
int j; Yi-,Pb?
while ((j = k << 1) <= size) { 87pu\(,'
if (j < size %26amp;%26amp; queue[j] j++; 7iy2V;}
if (queue[k]>queue[j]) file://不用交换 Us[F@
break; _or_Vw!
SortUtil.swap(queue,j,k); asW W@E
k = j; {#t7lV'4
} E?&YcVA
} R<3 -!p1v
private void fixUp(int k) { iQ;lvOja
while (k > 1) { s_Z5M2o
int j = k >> 1; uv$utu>< *
if (queue[j]>queue[k]) %f\j)qw
break; $5#DU__F/
SortUtil.swap(queue,j,k); MTR+|I3V
k = j; 4Qi-zNNB
} ,\T`gh
} >of9m
CTqhXk[
} &i805,lx
tPk>hzW
} ^c}kVQ\g3
>YdLB@
SortUtil： [pt U}
[$]-W$j+
package org.rut.util.algorithm; D7IhNWrgj
B_@p@6z
import org.rut.util.algorithm.support.BubbleSort; -g"Wi@Qr
import org.rut.util.algorithm.support.HeapSort; >N0L
import org.rut.util.algorithm.support.ImprovedMergeSort; cI6Td*vM
import org.rut.util.algorithm.support.ImprovedQuickSort; ?:5/4YC
import org.rut.util.algorithm.support.InsertSort; (s+}l?
import org.rut.util.algorithm.support.MergeSort; )*}?EI4.
import org.rut.util.algorithm.support.QuickSort; @]]\r.DG
import org.rut.util.algorithm.support.SelectionSort; A)#Fyde
import org.rut.util.algorithm.support.ShellSort; eOb)uIF
P-Gp^JX8
/** H ~<.2b
* @author treeroot ;iN[du
* @since 2006-2-2 1yS:`
* @version 1.0 '^Q$:P{G?
*/ *\0h^^|@
public class SortUtil { x9]vhR/av
public final static int INSERT = 1; L8pKVr
public final static int BUBBLE = 2; ihct~y-9W
public final static int SELECTION = 3; ?5[$d{ Gjl
public final static int SHELL = 4; !6 kn>447Y
public final static int QUICK = 5; 3z k},8fu
public final static int IMPROVED_QUICK = 6; K,bX<~e5
public final static int MERGE = 7; v# fny
public final static int IMPROVED_MERGE = 8; _GoFwVO
public final static int HEAP = 9; Lq#!}QcW=
,{'ZP_
public static void sort(int[] data) { ^C2SLLgeJ
sort(data, IMPROVED_QUICK); QqC-ztz
} R2Q1Rk#
private static String[] name={ =QwT)KRB%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dA#'HMh@
}; Nc^:v/(P
}+:X=@Z@
private static Sort[] impl=new Sort[]{ 7Zft]C?|@
new InsertSort(), @6y)wA9Yx
new BubbleSort(), e\ZV^h}TQ
new SelectionSort(), gP!k[E,Q8
new ShellSort(), Gfepm$*%
new QuickSort(), "`KT7
new ImprovedQuickSort(), VTO92Eo
new MergeSort(), eV9,G8
new ImprovedMergeSort(), 0,cU^HMA
new HeapSort() B}I9+/|{
}; d(vt0
,W$&OD
public static String toString(int algorithm){ =+4om*
return name[algorithm-1]; CE4Kc33OU|
} 1_mqPMm
8%Ak
public static void sort(int[] data, int algorithm) { ,H/BW`rL]#
impl[algorithm-1].sort(data); N.V5>2
} #Fh:z4
OFZo"XtF
public static interface Sort { *b`1+~p_2
public void sort(int[] data); &<(&u`S
} 'qoaMJxN`
<I{Yyl^
public static void swap(int[] data, int i, int j) { u} [.*e
int temp = data; mW3IR3b
data = data[j]; =)!~t/
data[j] = temp; !^aJS'aq
} cmp@Ow"c
} Vzh\1cF