[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; ]D5Maid+
} Md>C!c
int i1=l; yc9!JJMkH
int i2=mid+1; >Ho=L)u
for(int cur=l;cur<=r;cur++){ RuVk>(?WK%
if(i1==mid+1) Bi;a~qE
data[cur]=temp[i2++]; }OnU32P
else if(i2>r) `_GCS,/t
data[cur]=temp[i1++]; 03|nP$g
else if(temp[i1] data[cur]=temp[i1++]; mT@Gf>}/A
else !D{z. KO
data[cur]=temp[i2++]; }m?Ut|
} =ZU!i0 K
} iJ*Wsp
a]P%Y.?r
} <4;, y*"n
DC> R
改进后的归并排序: RJ0,7E<B
Yz[Rl ^
package org.rut.util.algorithm.support; 60%fva
i83Jy w,f
import org.rut.util.algorithm.SortUtil; Nlm}'Xt
H'k~;
/** Jpp-3i.F#
* @author treeroot '>1M~B
* @since 2006-2-2 D2D+S
* @version 1.0 MD1X1,fk
*/ K\B!tk
public class ImprovedMergeSort implements SortUtil.Sort { &@|? %
paN=I=:*M
private static final int THRESHOLD = 10; &-^*D%9
euT=]j
/* ?(B}w*G~
* (non-Javadoc) 7z, $
* OA9P"*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $U7/w?gc'
*/ sVP\EF8PY
public void sort(int[] data) { Kc^ctAk7;
int[] temp=new int[data.length]; P%yL{
mergeSort(data,temp,0,data.length-1); Jn|<G
} ^9hc`.5N&?
u:(=gj,~x
private void mergeSort(int[] data, int[] temp, int l, int r) { ?RG;q
int i, j, k; H@zv-{}T8
int mid = (l + r) / 2; jZidT9[g
if (l == r) U)-aecB!
return; avG#0AY
if ((mid - l) >= THRESHOLD) \,p?pL<'
mergeSort(data, temp, l, mid); )q4nyT>M
else >a2[P"
insertSort(data, l, mid - l + 1); ,*lns.|n
if ((r - mid) > THRESHOLD) U{lf$
mergeSort(data, temp, mid + 1, r); `aX+Gz?
else DtGkhq;
insertSort(data, mid + 1, r - mid); W2$rC5|
7g{JE^u
for (i = l; i <= mid; i++) { o8E<_rei
temp = data; hB\BFVUSn/
} RDQ]_wsyKG
for (j = 1; j <= r - mid; j++) { im:[ViR {
temp[r - j + 1] = data[j + mid]; f`>\bdz
} tQ'R(H`
int a = temp[l]; @pv:uON\
int b = temp[r]; ?Y\WSI?i
for (i = l, j = r, k = l; k <= r; k++) { g9g ]X
if (a < b) { .uX(-8n ~
data[k] = temp[i++]; ~v/` `s
a = temp; (kK8 OxfF
} else { *Z.{1
data[k] = temp[j--]; f]Aa$\@b
b = temp[j]; (qc<'$o
} oliVaavj
} 13 JG[,w
} ;2fzA<RkK
K]>4*)A:
/** {nA+-=T
* @param data ~KGE(o4p
* @param l |yOIC,5[JW
* @param i :|I"Em3R
*/ *Y53bZ
private void insertSort(int[] data, int start, int len) { 3~WI3ZIR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K|~!oQ
} q(s0dkrj
} &2@Rc?!6_P
} !m_y@~pV#u
} ~^Ga?Q_
>c:nr&yP
堆排序： HH(2
],R\oMYy|P
package org.rut.util.algorithm.support; -2U|G
1T~`$zS7
import org.rut.util.algorithm.SortUtil; d*([!!i
BUh(pS:
/** 1,Pg^Xu
* @author treeroot g;o5m}
* @since 2006-2-2 TK>~)hc}
* @version 1.0 cqZlpm$c
*/ =-P<v2|e
public class HeapSort implements SortUtil.Sort{ ~$ ?85
<Z~Nz>'r
/* (non-Javadoc) |z}VP-L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .bh7
*/ 2Z^p)
public void sort(int[] data) { Gh{9nM_\"
MaxHeap h=new MaxHeap(); @1pfH\m
h.init(data); KV{
for(int i=0;i h.remove(); \!>qtFT
System.arraycopy(h.queue,1,data,0,data.length); ZL!5dT&@W
} Ix=(f0|
!]7L9TGn
private static class MaxHeap{ ky]L`w
]wbV1Y"
void init(int[] data){ 3<a|_(K
this.queue=new int[data.length+1]; _a?x)3\v
for(int i=0;i queue[++size]=data; G}WY0FC6
fixUp(size); 6(A"5B=\
} m5?t<H~
} 1Sns$t%b
q8e]{sT'!
private int size=0; h:z$uG
ESS1 L$y
private int[] queue; +H? XqSC
uAk>VPuuZ
public int get() { ?6MUyH]a
return queue[1]; 1F2(MKOo!
} H}usL)0&&
,MLAW
public void remove() { +rrA>~
SortUtil.swap(queue,1,size--); {FN4BC`3+
fixDown(1); G)3r[C^[k
} ?FZ) LZM
file://fixdown mI^S%HT
private void fixDown(int k) { e]:(.Wb- 9
int j; uD4W@*PYr
while ((j = k << 1) <= size) { eM7F8j
if (j < size %26amp;%26amp; queue[j] j++; -7I%^u
if (queue[k]>queue[j]) file://不用交换 J]NMqiq
break; bSTTr<W
SortUtil.swap(queue,j,k); z=rSb4"W
k = j; 3?&P^{
} %~Wr/TOt+
} lj*=bK
private void fixUp(int k) { [RDY(}P%
while (k > 1) { V)oKsO
int j = k >> 1; '?mky,:HT
if (queue[j]>queue[k]) @_#]7
break; qs (L2'7/
SortUtil.swap(queue,j,k); u@4khN: ^p
k = j; 8feLhWg'P
} \tU[,3
} E,A9+OKxJ
urD{'FQf
} +5Y;JL<%/
>+[{m<Eq
} Hv =7+O$
/XuOv(j
SortUtil： j W-K
clT[?8*
package org.rut.util.algorithm; HNX/#?3
[hiV#
import org.rut.util.algorithm.support.BubbleSort; - l0X]&Ex
import org.rut.util.algorithm.support.HeapSort; lp1GK/!s
import org.rut.util.algorithm.support.ImprovedMergeSort; wr6(C:
import org.rut.util.algorithm.support.ImprovedQuickSort; #<w2xR]:
import org.rut.util.algorithm.support.InsertSort; dhr-tw
import org.rut.util.algorithm.support.MergeSort; llpgi,-=
import org.rut.util.algorithm.support.QuickSort; 4_ZHY?VRd
import org.rut.util.algorithm.support.SelectionSort; T'14OU2N{Y
import org.rut.util.algorithm.support.ShellSort; (6)X Fp&
"(;t`,F
/** ;Z&w"oSJ
* @author treeroot j|r$!gV
* @since 2006-2-2 '81WogH:
* @version 1.0 _E^ !,Wz
*/ n*eqM2L
public class SortUtil { x{VUl
public final static int INSERT = 1; %cq8%RT
public final static int BUBBLE = 2; 5pxw[c53#
public final static int SELECTION = 3; RWGAxq`9f
public final static int SHELL = 4; 2&<&q J
public final static int QUICK = 5; 6?l|MU"Q.
public final static int IMPROVED_QUICK = 6; ~:UAL}b{\~
public final static int MERGE = 7; Rap_1o9#\
public final static int IMPROVED_MERGE = 8; <'P+2(Oi
public final static int HEAP = 9; Ke\FzZ]
HhUk9 >7
public static void sort(int[] data) { ^F+7@*u
sort(data, IMPROVED_QUICK); Qy'-3GB
} 0&6(y* #Z
private static String[] name={ 3hR3)(+1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 04!akPP<
}; +tv"j;z
SiT5QJe
private static Sort[] impl=new Sort[]{ ].x`Fq3
new InsertSort(), q{Gf@
new BubbleSort(), IOH6h=
new SelectionSort(), /|[%~`?BM
new ShellSort(), tfd!;`B
new QuickSort(), %T~LK=m
new ImprovedQuickSort(), ,@@FAL
new MergeSort(), %uy?@e
new ImprovedMergeSort(), fSm|anuKZe
new HeapSort() X0]5I0YP
}; v,)vW5jGI
yxy~N\0
public static String toString(int algorithm){ .$r7q[
return name[algorithm-1]; {&)E$M
} {9h`h08?z
RV6|sN[x>
public static void sort(int[] data, int algorithm) { @?[}\9dW
impl[algorithm-1].sort(data); |\h<!xR
} }H9V$~}@-
-Rr Qv(
public static interface Sort { M_#^zo "x
public void sort(int[] data); S(5&%}QFQ
} 5[rA>g~
qa/VSk!{
public static void swap(int[] data, int i, int j) { *>7Zc
int temp = data; #}nDX4jI
data = data[j]; @D=i|f
data[j] = temp; Ug^vVc)
} bqm%@*fZo
} J]$]zD