[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; (lwkg8WC
} -1:yqF.x
int i1=l; '?v.O}
int i2=mid+1; $wdIOfaH
for(int cur=l;cur<=r;cur++){ oslrv7EK
if(i1==mid+1) K {!eHTU
data[cur]=temp[i2++]; ?X]7jH<iw;
else if(i2>r) EbY%:jR
data[cur]=temp[i1++]; [|<|a3']|
else if(temp[i1] data[cur]=temp[i1++]; "DjD"?/b
else }PK8[N
data[cur]=temp[i2++]; i0L)hkV
} :p=IZY
} gK9@-e
jQj`GnN|
} ds4ERe /
iU~oPp[e
改进后的归并排序: Zc{at}{
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package org.rut.util.algorithm.support; tegLGp@_
qI) Yzc/
import org.rut.util.algorithm.SortUtil; n>+M4Zb
n3g3(}Q0
/** G;yf]xFd
* @author treeroot -SlLX\>p
* @since 2006-2-2 0V}%'Ec<e
* @version 1.0 L/F!Y%=;[
*/ ql2>C.k3L
public class ImprovedMergeSort implements SortUtil.Sort { 2Af1-z^^K
-$QzbRF5R
private static final int THRESHOLD = 10; ?r'rvu'/
R}#?A%,*
/* 3(}W=oI
* (non-Javadoc) `(q+@#)
* wZ0$ylEX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #:v|/2
*/ &+xNR2";
public void sort(int[] data) { p4fU/
int[] temp=new int[data.length]; K!).QB'
mergeSort(data,temp,0,data.length-1); H .JA)*b-
} ,&Gn7[<
}{n[_:[7
private void mergeSort(int[] data, int[] temp, int l, int r) { Cz+`C9#
int i, j, k; 2LiJ IO8N
int mid = (l + r) / 2; NJI-8qTGI
if (l == r) #B88w9 b`D
return; GASDkVoij
if ((mid - l) >= THRESHOLD) $GSn#} yz
mergeSort(data, temp, l, mid); ^Cst4=:W
else !.?2zp~
insertSort(data, l, mid - l + 1); 3T'9_v[Y
if ((r - mid) > THRESHOLD) 4@u*#Bp`|
mergeSort(data, temp, mid + 1, r); Ty}'A(U
else ?rKewdGY
insertSort(data, mid + 1, r - mid); ,j:`yB]4,
0/6f9A
for (i = l; i <= mid; i++) { yrSmI)&%
temp = data; Q=)$
} fk<0~tE
for (j = 1; j <= r - mid; j++) { S4n\<+dR<
temp[r - j + 1] = data[j + mid]; `%ZM(9T
} z{wJQZ9"
int a = temp[l]; Nz'fMdaX,
int b = temp[r]; pi*cO
for (i = l, j = r, k = l; k <= r; k++) { pV9$Vg?-H
if (a < b) { `+CRUdr
data[k] = temp[i++]; B36_OH
a = temp; NoB)tAvw
} else { yTm/P!1S
data[k] = temp[j--]; 2`9e20
b = temp[j]; 7v]>ID
} 5V':3o;D__
} <~X4&E]rT_
} ,6=j'j1#a
M2W4 RovfR
/** z\]]d?d?;
* @param data 7y5`YJ}!
* @param l G|H+ ,B
* @param i --6C>iY[&u
*/ SP?~i@H
private void insertSort(int[] data, int start, int len) { S1p4.qJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [_Fj2nb*
} <U%4$83$
} U>H"N1
} r7+"i9
} F0t-b%w,
I<L
堆排序： JfGU3d*c
uD0T()J.P5
package org.rut.util.algorithm.support; 0/5 a3-3{
++w7jVi9
import org.rut.util.algorithm.SortUtil; ?12[8
aZn]8jC%
/** K~$A2b95
* @author treeroot hfE5[
* @since 2006-2-2 RL4J{4K
* @version 1.0 BpBMFEiP
*/ ~_6~Fi
public class HeapSort implements SortUtil.Sort{ cc- liY"
/>Kd w
/* (non-Javadoc) 6hp>w{+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O_OgTa
*/ \NU^Jc_k7
public void sort(int[] data) { :%7y6V*
MaxHeap h=new MaxHeap(); T&+*dyNxMK
h.init(data); PvF3a`&r
for(int i=0;i h.remove(); ?*cr|G$r[
System.arraycopy(h.queue,1,data,0,data.length); K~Nx;{{d
} 6l]jmj)/
+-~8t^
private static class MaxHeap{ 1[p6v4qO{
Nk?eVJ)
void init(int[] data){ sB`.G
this.queue=new int[data.length+1]; e}>3<Dh
for(int i=0;i queue[++size]=data; !xcLJ5^W
fixUp(size); Oxsx\f_
} _}+Aw{7!r
} 0"}qND
dyWj+N5(
private int size=0; q>|&u
NH9"89]E
private int[] queue; 3MX&%_wUhB
n x4:n@J
public int get() { {6Y|Z>
return queue[1]; V3D`pt\[x
} u+EZ"p;o
xnP@h
public void remove() { 3D 4-Wo4
SortUtil.swap(queue,1,size--); (%~^Kmfb0
fixDown(1); $ /`X7a{
} 3fGL(5|_
file://fixdown =EFCd=i
private void fixDown(int k) { v}\4/u
int j; _4,/uG|a O
while ((j = k << 1) <= size) { CCDU5l$$
if (j < size %26amp;%26amp; queue[j] j++; #mKF)W
if (queue[k]>queue[j]) file://不用交换 sbv2*fno5
break; OFe-e(c1
SortUtil.swap(queue,j,k); {,aX|*1Ku~
k = j; ~(*2:9*0
} \MqOHM.[
} Jlp nR#@
private void fixUp(int k) { Sf*1Z~P|
while (k > 1) { V#X#rDfJZ
int j = k >> 1; .n[;H;
if (queue[j]>queue[k]) bT>MZK8b
break; aAKwC01?
SortUtil.swap(queue,j,k); 6|uv+$
k = j; U}T{r%9
} moS0y?N
} QjOO^6Fh
QL]e<2oPJ
} jQBL8<
H#Hhi<2
} iX%9$Bft<
7f] qCZ<0V
SortUtil： dJv2tVm&'
?}RPnf
package org.rut.util.algorithm; +>3jMs~&
[s4|+
import org.rut.util.algorithm.support.BubbleSort; tn{YIp
import org.rut.util.algorithm.support.HeapSort; :a/l9 m(
import org.rut.util.algorithm.support.ImprovedMergeSort; r[g
import org.rut.util.algorithm.support.ImprovedQuickSort; xO[V>Ud
import org.rut.util.algorithm.support.InsertSort; T<oDLJA\
import org.rut.util.algorithm.support.MergeSort; W{m_yEOf
import org.rut.util.algorithm.support.QuickSort; &NKb},~
import org.rut.util.algorithm.support.SelectionSort; 5o6X.sC8e
import org.rut.util.algorithm.support.ShellSort; mqtX7rej
]f{3_M[
/** HmiG%1+{A
* @author treeroot %@9c'6
* @since 2006-2-2 UpaF>,kM
* @version 1.0 71n3d~!O>
*/ .af+h<RG4$
public class SortUtil { ZyM7)!+kPa
public final static int INSERT = 1; GXaPfC0-y
public final static int BUBBLE = 2; A!cY!aQ
public final static int SELECTION = 3; :6MV@{;PJ
public final static int SHELL = 4; xv"v='
public final static int QUICK = 5; dBw7l}
public final static int IMPROVED_QUICK = 6; |yl,7m/B-G
public final static int MERGE = 7; ''dS{nQs
public final static int IMPROVED_MERGE = 8; Al1_\vx7
public final static int HEAP = 9; n:|a;/{I]9
{p.^E5&
public static void sort(int[] data) { Yt[LIn-v:
sort(data, IMPROVED_QUICK); 4#qZ`H,Ur)
} !>\&*h-Cm#
private static String[] name={ 5^D094J|^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q5c3C&$6
}; /!?b&N/d)
EHy15RL
private static Sort[] impl=new Sort[]{ D V\7KKJE
new InsertSort(), Mz6\T'rC
new BubbleSort(), X1HEeJ|
new SelectionSort(), }.a{;{y
new ShellSort(), i#98KzE
new QuickSort(), >AFQm
new ImprovedQuickSort(), <Drm#2x!E
new MergeSort(), yg.o?eML
new ImprovedMergeSort(), ~&?57Sw*m
new HeapSort() 2vTO>*t
}; 2?Y8hm
$l2`@ia"
public static String toString(int algorithm){ 9a[1s|>w-
return name[algorithm-1]; 0W0GSDx
} 3! #|hI>f
;A4qE W
public static void sort(int[] data, int algorithm) { ",l6-<s
impl[algorithm-1].sort(data); wPEK5=\4Ob
} mv>0j<C91
Llkh kq_
public static interface Sort { IQ$!y,VJ
public void sort(int[] data); c2t`i
} R#3zGWr~
lz!(OO,g
public static void swap(int[] data, int i, int j) { p>,D F9W`
int temp = data; |sI@m@
data = data[j]; 0BNH~,0u
data[j] = temp; -:95ypi
} I{Ip
} ny{S&f