[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; T:~vk.Or
} w(L4A0K[
int i1=l; :>5@cvc
int i2=mid+1; DA\2rLs
for(int cur=l;cur<=r;cur++){ j:v@pzTD
if(i1==mid+1) ;0Tx-8l
data[cur]=temp[i2++]; uLV#SQ=bZN
else if(i2>r) `x*Pof!Io
data[cur]=temp[i1++]; [TmIVQ!B
else if(temp[i1] data[cur]=temp[i1++]; c24dSNJg,
else ln6d<; M5
data[cur]=temp[i2++]; ,5h)x"s
} I`!<9OTBj
} 6^`1\ #f
F'21jy&
} K|[*t~59
2GDD!w#!j
改进后的归并排序: 'd9INz.
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package org.rut.util.algorithm.support; %lGl,me H
9w7n1k.
import org.rut.util.algorithm.SortUtil; HMNLa*CL'
2fL;-\!y(
/** WvY? +JXJ
* @author treeroot %WjXg:R
* @since 2006-2-2 fbe[@#:
* @version 1.0 JkbQyn
*/ |IzPgC
public class ImprovedMergeSort implements SortUtil.Sort { [<@.eH$hU/
+ R~'7*EI
private static final int THRESHOLD = 10; &OH={Au
Fww :$^_ k
/* W:pIPDx1=!
* (non-Javadoc) ;~m8;8)
* uxr #QA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #V~me
*/ a.k.n<
public void sort(int[] data) { 0Qf,@^zL*
int[] temp=new int[data.length]; P/W XaE4
mergeSort(data,temp,0,data.length-1); [M=7M}f;
} ig/xv
k%WTJbuG<)
private void mergeSort(int[] data, int[] temp, int l, int r) { #Lh;CSS
int i, j, k; *nkoPVpC
int mid = (l + r) / 2; R{SF(g3
if (l == r) ivJ@=pd)B
return; |v3T!
if ((mid - l) >= THRESHOLD) vdc\R?
mergeSort(data, temp, l, mid); gCB |DY
else x??+~$}\*-
insertSort(data, l, mid - l + 1); Swig;`
if ((r - mid) > THRESHOLD) B|C2lu
mergeSort(data, temp, mid + 1, r); c(xrP/yOwi
else Ng2twfSl$
insertSort(data, mid + 1, r - mid); \@c,3
52Z2]T c,
for (i = l; i <= mid; i++) { Yg||{
temp = data; Ga^"1TZ x
} iu=7O
for (j = 1; j <= r - mid; j++) { :(P9mt
temp[r - j + 1] = data[j + mid]; 8e1UmM[
} 3YOq2pW72G
int a = temp[l]; "*e$aTZB\
int b = temp[r]; qN9(S:_Px
for (i = l, j = r, k = l; k <= r; k++) { -=)H{
if (a < b) { }C"%p8=HM
data[k] = temp[i++]; V^bwXr4f
a = temp; {EB;h\C
} else { s+$ Q}|?u
data[k] = temp[j--]; dy%;W%
b = temp[j]; wd8l$*F*
} *&^Pj%DX
} N/"{.3{W
} 84& $^lNV
|4;Fd9q^m
/** "^})zf~_
* @param data FrGgga$
* @param l hF~n)oQ
* @param i \/r}]Vz
*/ PR#exm&
private void insertSort(int[] data, int start, int len) { nv|NQ Tk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7rc0yB
} &[?\k>
} 'CM|@Zz%
} Tztu}t]N
} a/4T>eC
'}53f2%gKa
堆排序： ?jv/TBZX4
$]/{[@5
package org.rut.util.algorithm.support; N2^=E1|_
c<B/V0]
import org.rut.util.algorithm.SortUtil; MzdV2.
_^Ubs>d=*
/** 99e.n0
* @author treeroot /$Nsd
* @since 2006-2-2 3w*R&
* @version 1.0 JzQ_{J`k
*/ [.7d<oY
public class HeapSort implements SortUtil.Sort{ xX&+WR
%HhnSi1K
/* (non-Javadoc) l`lk-nb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {T$9?`h~M
*/ tTl%oN8Qw
public void sort(int[] data) { y@S$^jk.
MaxHeap h=new MaxHeap(); U`(ee*}o
h.init(data); k_#ak%m/
for(int i=0;i h.remove(); t%0VJB,Q2
System.arraycopy(h.queue,1,data,0,data.length); yW=::=
} y&$A+peJ1
NZ:,ph
private static class MaxHeap{ KxJ!,F{>H
%v M-mbX
void init(int[] data){ x)DMPVB<
this.queue=new int[data.length+1]; {BN#h[#B{
for(int i=0;i queue[++size]=data; G5BfNU
fixUp(size); LYTdTP
} ,q`\\d
} U)o-8OEZ9
jp%S3)
private int size=0; z#wkiCRYm
T4Uev*A
private int[] queue; <44G]eb
lfow1WRF
public int get() { *w`sM%]Rq
return queue[1]; Z"xvh81P
} 2*& ^v
vm8eZG|
public void remove() { ?(1y
SortUtil.swap(queue,1,size--); `g=J%p
fixDown(1); 6xx ?A>:
} -$ls(oot
file://fixdown 3qC}0CP*
private void fixDown(int k) { Gx/Oi)&/
int j; <dtGK~_
while ((j = k << 1) <= size) { 6@5+m 0`u3
if (j < size %26amp;%26amp; queue[j] j++; >1Ibc=}g
if (queue[k]>queue[j]) file://不用交换 E<Y$>uKA
break; D%pF;XY
SortUtil.swap(queue,j,k); `4J$Et%S
k = j; K\Wkoi5
} iOghb*aW
} Rr]Hy^w
private void fixUp(int k) { tXs\R(?T
while (k > 1) { k1~&x$G
int j = k >> 1; cOJo3p;&
if (queue[j]>queue[k]) jvL[ JI,b
break; Ynj,pl
SortUtil.swap(queue,j,k); =&]g "a'
k = j; S9y}
} b2Fe<~S{
} K($Npuu]
6<QQ@5_
} 4xje$/_d
*w\W/Y
} $Ds2>G4c
i-_mTY&M
SortUtil： |0b`fOS
kbQ>a5`,x
package org.rut.util.algorithm; #=A)XlZMd
LL~%f &_
import org.rut.util.algorithm.support.BubbleSort; *]) `z8Ox
import org.rut.util.algorithm.support.HeapSort; :g0zT[f
import org.rut.util.algorithm.support.ImprovedMergeSort; uo8YP<q
import org.rut.util.algorithm.support.ImprovedQuickSort; jV1.Yz(`
import org.rut.util.algorithm.support.InsertSort; EV%gF
import org.rut.util.algorithm.support.MergeSort; wlqksG[B
import org.rut.util.algorithm.support.QuickSort; \Gvm9M
import org.rut.util.algorithm.support.SelectionSort; cdT7 @
import org.rut.util.algorithm.support.ShellSort; .Yn_*L+4*
kn4`Fa;)O
/** Bj;'qB>3
* @author treeroot {4Cmu;u
* @since 2006-2-2 583|blL
* @version 1.0 '-~~-}= sJ
*/ dUZ ,m9u
public class SortUtil { ;4|15S
public final static int INSERT = 1; <\^8fn
public final static int BUBBLE = 2; }Zn}
public final static int SELECTION = 3; VY4yS*y
public final static int SHELL = 4; sDlO#
public final static int QUICK = 5; aEeodA<(
public final static int IMPROVED_QUICK = 6; Z@!+v19^
public final static int MERGE = 7; e*NnVys
public final static int IMPROVED_MERGE = 8; VpDbHAg
public final static int HEAP = 9; BW4J>{
on`3&0,.
public static void sort(int[] data) { 6LIJQ
sort(data, IMPROVED_QUICK); m;QMQeGz
} hz@bW2S.
private static String[] name={ E ~<JC"]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rjYJs*#
}; 0x@ mZ
OQJ6e:BGt
private static Sort[] impl=new Sort[]{ -FaJ^CN~
new InsertSort(), %>{0yEC
new BubbleSort(), Tyx_/pJT
new SelectionSort(), /82b S|
new ShellSort(), s.C_Zf~3
new QuickSort(), aqk!T%fg
new ImprovedQuickSort(), UZ+<\+q3^
new MergeSort(), M .mfw#*
new ImprovedMergeSort(), t'ql[
new HeapSort() @\#td5'
}; tGa8W
r;N|)
public static String toString(int algorithm){ u'BaKWPS
return name[algorithm-1]; (*iHf"=\
} 1=V-V<
3a'<*v<xw
public static void sort(int[] data, int algorithm) { MQ6KN(?\ZL
impl[algorithm-1].sort(data); MQ8J<A Pf-
} wnC81$1l~
$xN|5;+
public static interface Sort { fNFY$:4X
public void sort(int[] data); }pkzH'$HJ
} wf<M)Rs|
}BP;1y6-r
public static void swap(int[] data, int i, int j) { $=4QO
int temp = data; 0L52#;?Si"
data = data[j]; ]c'A%:f<
data[j] = temp; T6=u P)!K
} 5=ryDrx
} Q^")jPd