[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; k9V#=,K0
} K,ccM[hu|
int i1=l; 8'niew 5d
int i2=mid+1; PRR]DEz
for(int cur=l;cur<=r;cur++){ 'Y6x!i2
if(i1==mid+1) EWI2qaSnO
data[cur]=temp[i2++]; *,hg+?lZ
else if(i2>r) `R9}.?7
data[cur]=temp[i1++]; scXY~l]I*
else if(temp[i1] data[cur]=temp[i1++]; TSgfIE|
else <BUKTRq
data[cur]=temp[i2++]; K2'Il[
} 1 P0)La#
} _TGv"c@V
Q1cM{$}M
} K\bA[5+N
,Pq@{i#
改进后的归并排序: 8ZnHp~
nfL-E:n=
package org.rut.util.algorithm.support; uBr^TM$k&
XL10W ^
import org.rut.util.algorithm.SortUtil; kYwV0xQ
Hp#IOsP~
/** ^HO'"/tB@D
* @author treeroot qs9q{n-Aj
* @since 2006-2-2 T:~c{S4&
* @version 1.0 K!L0|WH%!
*/ _LYI#D
public class ImprovedMergeSort implements SortUtil.Sort { vtm?x,h
q6A"+w,N
private static final int THRESHOLD = 10; nm8XHk]
t08E 2sI
/* oqXs2F
* (non-Javadoc) <WWn1k_
* w=|"{-ijo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +!@@55I-
*/ GLS`1!
public void sort(int[] data) { >[$j(k^
int[] temp=new int[data.length]; HVG:q#=C
mergeSort(data,temp,0,data.length-1); AW6"1(D
} L}*s_'_e^>
Q5kf-~Jx+
private void mergeSort(int[] data, int[] temp, int l, int r) { D|8Pe{`
int i, j, k; r+yl{
int mid = (l + r) / 2; wjRv=[
if (l == r) E1"H(m&6
return; Xb/W[rcs
if ((mid - l) >= THRESHOLD) R&!{3!V
mergeSort(data, temp, l, mid); ::&hfHR*P
else eeix-Wt*E
insertSort(data, l, mid - l + 1); nQHQVcDs8
if ((r - mid) > THRESHOLD) 54^2=bp
mergeSort(data, temp, mid + 1, r); OG!+p}yD]
else W%&[gDp
insertSort(data, mid + 1, r - mid); Z(~v{c %<
dPVl\<L1
for (i = l; i <= mid; i++) { HZ_,f"22
temp = data; n _H]*~4F
} oMw#ROsvC
for (j = 1; j <= r - mid; j++) { 3-%F)@n
temp[r - j + 1] = data[j + mid]; lk(q>dvK
} Z%_m<Nf8T
int a = temp[l]; $K'A_G^
int b = temp[r]; -9X#+-
for (i = l, j = r, k = l; k <= r; k++) { uhf% zG
if (a < b) { RaX:&PE
data[k] = temp[i++]; 1OwVb
a = temp; #P^cR_|\
} else { ~HM,@5dFC
data[k] = temp[j--]; 6u6,9VG,
b = temp[j]; Z~s"=kF,
} W "}Cfv
} ?h1r6?Sug{
} &Bc$8ZR
m})EYs1
/** @D3|Ak1
* @param data 0|L%)'F
* @param l o&PPW~D+h@
* @param i 1>"Yw|F-|3
*/ aj\ zc I
private void insertSort(int[] data, int start, int len) { Wh7}G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y}aaW[
} B=,j$uH
} .!><qVg
} IT5a/;J
} =D}]|ie
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堆排序： o4l=oY:'
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package org.rut.util.algorithm.support; V']{n7a-
J Gpy$T{t
import org.rut.util.algorithm.SortUtil; e5HHsR6
'(.vB~m7*+
/** `;\<Fr
* @author treeroot dJYW8pcKT
* @since 2006-2-2 9NPOdt:@
* @version 1.0 ^5,B6
*/ Mu>WS)1lS
public class HeapSort implements SortUtil.Sort{ 2 yY.rs
0;6^fiSY;
/* (non-Javadoc) uY"Bgz:=d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QV_e6r1t#m
*/ >ow5aOlQ&
public void sort(int[] data) { K3xs=q]:@
MaxHeap h=new MaxHeap(); 7hLdCSX
h.init(data); aplOo[
for(int i=0;i h.remove(); iAd3w6
System.arraycopy(h.queue,1,data,0,data.length); ^~65M/
} c1CUG1i
TQjM3Ri=V
private static class MaxHeap{ &nXa/XIZ_
CEMe2~
void init(int[] data){ Ga9^+.j
this.queue=new int[data.length+1]; 7L"Pe'Hw
for(int i=0;i queue[++size]=data; u&7c2|Q
fixUp(size); JPt0k
} x]X!nx6G
} {r.yoI4e
PRpW*#"EI
private int size=0; "^3pP(8;~
Pm}
private int[] queue; :~gG]|F
E5EAk6
public int get() { q n2X._`
return queue[1]; ^CtA@4
} `~S; UG
~,: FZ1wh
public void remove() { gb,X"ODq
SortUtil.swap(queue,1,size--); iAWd 9x
fixDown(1); __Tg1A
} 3ug-cq
file://fixdown _w\A=6=q|
private void fixDown(int k) { =Kh1HU.F
int j; ' 6#en9{L
while ((j = k << 1) <= size) { Kz`g Q|S
if (j < size %26amp;%26amp; queue[j] j++; { :~&#D
if (queue[k]>queue[j]) file://不用交换 pZA0Go2!IN
break; =u,8(:R]s
SortUtil.swap(queue,j,k); hiM nU
k = j; tPb$ua|
} Eqc,/
} kd3vlp
private void fixUp(int k) { P!*G"^0<
while (k > 1) { A@I( &Z
int j = k >> 1; C2/B1ba
if (queue[j]>queue[k]) x+V@f~2F
break; PE7D)!d T
SortUtil.swap(queue,j,k); fZ6"DJZ
k = j; Sph:OX8
} sERm+x<
} c&rS7%
3%'Y):
} &|8R4l C|
)?zlhsu}1;
} c|,6(4j>$
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SortUtil： [fjP.kw;J
u+ ?Wm40E
package org.rut.util.algorithm; Tz"Xm/Gy
x_K8Gr#Z0
import org.rut.util.algorithm.support.BubbleSort; '9R.$,N
import org.rut.util.algorithm.support.HeapSort; k9|8@3(h
import org.rut.util.algorithm.support.ImprovedMergeSort; y))) {X
import org.rut.util.algorithm.support.ImprovedQuickSort; BWHH:cX
import org.rut.util.algorithm.support.InsertSort; "F3M m
import org.rut.util.algorithm.support.MergeSort; ;I5u"MDHGI
import org.rut.util.algorithm.support.QuickSort; F#S)))#
import org.rut.util.algorithm.support.SelectionSort; %x2_njDd
import org.rut.util.algorithm.support.ShellSort; #3WKm*T/
F=qG+T
/** 0zCmU)ng
* @author treeroot ZNX=]]HM<n
* @since 2006-2-2 6k@(7Mw8A
* @version 1.0 e71dNL'$
*/ btV Tt5
public class SortUtil { nR2pqaKc
public final static int INSERT = 1; lz-t+LD@ST
public final static int BUBBLE = 2; :w+2L4lGs
public final static int SELECTION = 3; ]LE
public final static int SHELL = 4; h jCkj(b
public final static int QUICK = 5; "Om4P|
public final static int IMPROVED_QUICK = 6; K~I%"r|l
public final static int MERGE = 7; sPod)w?e
public final static int IMPROVED_MERGE = 8; D')m8:>
public final static int HEAP = 9; w.2[Xx~
9jC>OZ0s
public static void sort(int[] data) { +"HLx%k
sort(data, IMPROVED_QUICK); F}C.F
} TcP (?v
private static String[] name={ A3Lfh6O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jZ5 mpYUO
}; K\2UwX
AzmISm
private static Sort[] impl=new Sort[]{ 9:\YEs"
new InsertSort(), PU\?eA
new BubbleSort(), :qQpBr$
new SelectionSort(), hj_%'kk-A
new ShellSort(), "B~ow{3
new QuickSort(), 1;Dug
new ImprovedQuickSort(), 0';U3:=i,
new MergeSort(), I5$@1+B
new ImprovedMergeSort(), r{Cbx#;
new HeapSort() H1bPNt63
}; @0mR_\u\
c2aW4TX2
public static String toString(int algorithm){ .-[d6Pnw
return name[algorithm-1]; ha%3%O8Z
} mK>c+ u)
B"903g 1
public static void sort(int[] data, int algorithm) { zxV,v*L)
impl[algorithm-1].sort(data); -q}c;0vL-a
} 9PM\D@A{
:*`5|'G}
public static interface Sort { }z$_=v
public void sort(int[] data); [It E+{U
} juAUeGT
3ZF-n`
public static void swap(int[] data, int i, int j) { -ST[!W V
int temp = data; Y5Ub[o
data = data[j]; c~0hu*&
data[j] = temp; r/32pY
} #RG/B2
} )0Lno|l