[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; !C#RW=h9
} C._sgO
int i1=l; ak) -OL1
int i2=mid+1; X~he36-+<
for(int cur=l;cur<=r;cur++){ XO#)i6}G
if(i1==mid+1) 9|?Lz
data[cur]=temp[i2++]; ~(j'a!#Vvk
else if(i2>r) xLI{=sL
data[cur]=temp[i1++]; U 0RfovJ
else if(temp[i1] data[cur]=temp[i1++]; HF: T]n,
else LUNs|\&
data[cur]=temp[i2++]; yXA f
} BozK!"R_<
} cN7z(I0[
@$P!#z
} $Je"z]cy-
4nH91Z9=
改进后的归并排序: 51 0XDl~b
8 tygs
package org.rut.util.algorithm.support; ?=!XhU .
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import org.rut.util.algorithm.SortUtil; 7J;~&x
hIQ[:f
/** n u8j_grW
* @author treeroot q#&#*6 )B
* @since 2006-2-2 }t2pIkF;
* @version 1.0 IZ0$=aB7
*/ En9]x"_
public class ImprovedMergeSort implements SortUtil.Sort { \TB%N1^
5^K#Tj ;2
private static final int THRESHOLD = 10; fq'Xy9L
AdEbyL
/* @JEmybu
* (non-Javadoc) CQHp4_
* PdH`_/6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "&#WMi
*/ d^5SeCs6
public void sort(int[] data) { '[ g)v
int[] temp=new int[data.length]; 8I\eromG
mergeSort(data,temp,0,data.length-1); 1m`tqlFU9
} 7~ese+\smG
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private void mergeSort(int[] data, int[] temp, int l, int r) { 5o| !f
int i, j, k; wUCDJY:,1
int mid = (l + r) / 2; :"P hkR
if (l == r) ]KK ZbEO
return; G0QXf
if ((mid - l) >= THRESHOLD) ]jVSsSv
mergeSort(data, temp, l, mid); bp>ps@zFq
else ; G59}d p~
insertSort(data, l, mid - l + 1); cL)rjty2
if ((r - mid) > THRESHOLD) ^q&wITGI
mergeSort(data, temp, mid + 1, r); '<D`:srV
else B~;LBgpp
insertSort(data, mid + 1, r - mid); r.wIk0
N9=r#![>,
for (i = l; i <= mid; i++) { 2v9s@k/k)6
temp = data; $',GkK{NX
} Xc2B2c
for (j = 1; j <= r - mid; j++) { Cre0e$ a
temp[r - j + 1] = data[j + mid]; mU+FQX
} oiv2rOFu
int a = temp[l]; /GuSIZg"_
int b = temp[r]; ;2Ad])
for (i = l, j = r, k = l; k <= r; k++) { ju^"vw
if (a < b) { 5Vqmv<F;$Z
data[k] = temp[i++]; 22/?JWL>
a = temp; 9j?hF$L"
} else { bj7MzlGFy
data[k] = temp[j--]; ]tQDk4&i
b = temp[j]; 6I cM:x
} A-7wkZ.H
} c,+(FQ9
} F%.9fUo
v!#`W
/** B!r48<p
* @param data Vr-3M+l=O
* @param l L`\`NNQC
* @param i *mQDS.'AB@
*/ `F2*o47|t
private void insertSort(int[] data, int start, int len) { 3_oD[ ])A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {"0TO|%x
} g;-+7ViIr
} G{f`K^
} g2aT`=&Z
} n.a=K2H:V
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堆排序： I^M#[xA
bL'#
package org.rut.util.algorithm.support; 4VmCW"b7h
O&3r*vd
import org.rut.util.algorithm.SortUtil; A)RI:?+
6t_ 3%{
/** DYAwQ"i;6
* @author treeroot Z9"{f)T
* @since 2006-2-2 \2R`q*a+
* @version 1.0 4h;f>BG
*/ 5xMA~I0c
public class HeapSort implements SortUtil.Sort{ V<HOSB7
AU\xNF3
/* (non-Javadoc) TRk ?8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) co<2e#p;
*/ 4aalhy<j
public void sort(int[] data) { ^fE\S5P
MaxHeap h=new MaxHeap(); @jE d%W
h.init(data); } T/}0W]0
for(int i=0;i h.remove(); (RDa,&
System.arraycopy(h.queue,1,data,0,data.length); bIb6yVnHi
} G>=9gSLM
iJ`%yg,
private static class MaxHeap{ |t&G&)~:
:jk)(=^
void init(int[] data){ ko=aa5c
this.queue=new int[data.length+1]; 6z9R1&~%
for(int i=0;i queue[++size]=data; <OR.q
fixUp(size); DnNt@e2|
} vs\'1^*D
} ?qf:_G
zj~nnfoys
private int size=0; $z2xZqe
'A@qg^e:`
private int[] queue; V17>j0Ev$W
bU;}!iVc]
public int get() { MekT?KPQ{L
return queue[1]; 935-{h@k
} DO7-=74=
r/mA2
public void remove() { {E3xI2
SortUtil.swap(queue,1,size--); IvEMg2f}
fixDown(1); K-2.E
} /^++As0pY
file://fixdown tt+>8rxF:;
private void fixDown(int k) { z$9@j2
int j; =dgo!k
while ((j = k << 1) <= size) { D ?Nd;[
if (j < size %26amp;%26amp; queue[j] j++; 9U#\nXM
if (queue[k]>queue[j]) file://不用交换 \@Ee9C13
break; ^~ Ekg:`
SortUtil.swap(queue,j,k); 0zg2g!lh
k = j; Wyy^gJl
} mSU@UD|'
} C:]/8l
private void fixUp(int k) { S:/{
while (k > 1) { tlDYk
int j = k >> 1; gO+\O
if (queue[j]>queue[k]) {I4%
break; 9wAA. -"
SortUtil.swap(queue,j,k); J6*f Uh
k = j; Kb^>X{
} x|.v{tQa
} 9 0X?1
'#O;mBPNi
} *%:@ cbF-M
cb+l"FI7
} +C'XS{K,#
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SortUtil： :%N*{uy
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package org.rut.util.algorithm; x5oOF7#5
,"B?_d6
import org.rut.util.algorithm.support.BubbleSort; yk<VlS
import org.rut.util.algorithm.support.HeapSort; Nu@5 kwH
import org.rut.util.algorithm.support.ImprovedMergeSort; G%S6$@:
import org.rut.util.algorithm.support.ImprovedQuickSort; /?Vdqci
import org.rut.util.algorithm.support.InsertSort; 0x\2#i
import org.rut.util.algorithm.support.MergeSort; 7!pLK&_
import org.rut.util.algorithm.support.QuickSort; (qUK7$
import org.rut.util.algorithm.support.SelectionSort; cQX:%Ix=
import org.rut.util.algorithm.support.ShellSort; R<|ejw
R\*)@[y9l
/** s2^B(wP
* @author treeroot sm1;MF]/u
* @since 2006-2-2 [9OSpq
* @version 1.0 Dzr e'
*/ !n eo\
public class SortUtil { s _~IZ%+<.
public final static int INSERT = 1; I FsE!oDs4
public final static int BUBBLE = 2; bw9 nB{C<
public final static int SELECTION = 3; \QGa4_#
public final static int SHELL = 4; Z ] '>
public final static int QUICK = 5; r?pZ72q
public final static int IMPROVED_QUICK = 6; 1SUzzlRx
public final static int MERGE = 7; ll%G!VR
public final static int IMPROVED_MERGE = 8; 1fY>>*oP
public final static int HEAP = 9; ><=rIhG%H@
}z wX
public static void sort(int[] data) { ?W!ry7gXO
sort(data, IMPROVED_QUICK); Ad/($v5+
} xI?0N<'.*q
private static String[] name={ eRs&iK2y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _8^0!,j
}; Q ]"jD#F
=2%VZE7Vm
private static Sort[] impl=new Sort[]{ $eBQH
new InsertSort(), v5T`K=qC
new BubbleSort(), n?:2.S.8
new SelectionSort(), ]v\^&7pW
new ShellSort(), ;'}'5nO=$
new QuickSort(), !"E-\cc'
new ImprovedQuickSort(), (9]6bd
new MergeSort(), zT7"VbP
new ImprovedMergeSort(), (~&w-w3
new HeapSort() BqB|Fo
}; Ns<?b;aK
89Z#|#uM5
public static String toString(int algorithm){ d;=u
return name[algorithm-1]; !^iwQ55e2A
} _{$fA6C
4&{!M _
public static void sort(int[] data, int algorithm) { pDn&V(
impl[algorithm-1].sort(data); ,[X_]e;
} J4>;[\%m
|@RpWp>2
public static interface Sort { Qdu$Os
public void sort(int[] data); |9IC/C!HC
} )3%@9
^H3m\!h
public static void swap(int[] data, int i, int j) { 'wvMH;}u
int temp = data; Pu;yEh
data = data[j]; L^FcS\r;
data[j] = temp; Ie@Jb{x
} q@l(Qol
} m[:K"lZ ]2