[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; n0EKNMO
} Ble <n6
int i1=l; QjRVdb>
int i2=mid+1; hLBX,r)u
for(int cur=l;cur<=r;cur++){ ql],Wplg
if(i1==mid+1) i8dv|oa
data[cur]=temp[i2++]; Um*{~=;u
else if(i2>r) $o-s?";
data[cur]=temp[i1++]; l_$~~z ~
else if(temp[i1] data[cur]=temp[i1++]; .lqo>Ta y
else ;zs4>>^>
data[cur]=temp[i2++]; V-t!
} +]B^*99
} B:Msn)C~
dGZVWEaPfx
} xH*OEzN
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改进后的归并排序: vk{dL'
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package org.rut.util.algorithm.support; )=8X[<^i
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import org.rut.util.algorithm.SortUtil; D @T,j4o
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/** F!N;4J5u
* @author treeroot 8r+R~{
* @since 2006-2-2 aQkgkV;~
* @version 1.0 qksN {t
*/ Av7bp[OD
public class ImprovedMergeSort implements SortUtil.Sort { % &{>oEQ
kE/>Ys@w
private static final int THRESHOLD = 10; YpXUYNy
dxxD%lHCF
/* "o%N`Xlx
* (non-Javadoc) =|=9\3po
* hE+6z%A8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i3N _wv{
*/ 8la.N*
public void sort(int[] data) { s+^YGB
int[] temp=new int[data.length]; Cd]d[{NJ;
mergeSort(data,temp,0,data.length-1); Lab{?!E>U
} sl>4O]N
ME{i-E4
private void mergeSort(int[] data, int[] temp, int l, int r) { |$^,e%bE
int i, j, k; {WT"\Xj>B?
int mid = (l + r) / 2; QV7K~qi
if (l == r) hP,SvN#!2
return; kR9G;IZ8s
if ((mid - l) >= THRESHOLD) 0g~WM
mergeSort(data, temp, l, mid); GAEz :n
else H>a3\M
insertSort(data, l, mid - l + 1); f!eC|:D
if ((r - mid) > THRESHOLD) ?}bSQ)b
mergeSort(data, temp, mid + 1, r); !G Z2|~f9
else u3w `(3{<
insertSort(data, mid + 1, r - mid); ;F"W6G
A:0
for (i = l; i <= mid; i++) { VNx}ADXu]
temp = data; `yNNpSdS1
} 1DN,
for (j = 1; j <= r - mid; j++) { &(IL`%
temp[r - j + 1] = data[j + mid]; YNH>^cD1
} !634 8nU:
int a = temp[l]; GL9R 5
int b = temp[r]; lTDF5.aE
for (i = l, j = r, k = l; k <= r; k++) { i=#r JK=
if (a < b) { MuO7_*q'n
data[k] = temp[i++]; u'<Y#bsR#/
a = temp; 6^s]2mMfk
} else { ;XZ5r|V}
data[k] = temp[j--]; &H-39;?u
b = temp[j]; W9ZT=#>)[
} rX{QgyY&
} =3^YKI
} 4ehajK
;_%61ZI?M<
/** #B&D
* @param data ^-f5;B`\i
* @param l b=Zg1SqV
* @param i XCDHd ?Ld
*/ bv)E>%Yy
private void insertSort(int[] data, int start, int len) { cs8bRXjHa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1e _V@Vy
} ^{zwIH2I]
} N`Zm[Sv7
} Q{0-pHr}
} eWhv X9 <
@|j`I1r.A
堆排序： 1x V~EX
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package org.rut.util.algorithm.support; mO?G[?*\
Go^W\y
import org.rut.util.algorithm.SortUtil; pr>K#@^
T=ox;r
/** >6@*%LM
* @author treeroot {MO`0n; rt
* @since 2006-2-2 IhJ _Yed
* @version 1.0 a' .o
*/ "k"q)5c
public class HeapSort implements SortUtil.Sort{ st:[|`
b,#cc>76\
/* (non-Javadoc) OE}L})"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XqyfeY5t
*/ $lU~3I)
public void sort(int[] data) { +VAfT\G2
MaxHeap h=new MaxHeap(); 9 /t}S6b{
h.init(data); LZX-am`%
for(int i=0;i h.remove(); bqS*WgMY-
System.arraycopy(h.queue,1,data,0,data.length); 2j=3i@
} 0Dc$nL?TqX
yV$p(+KkS
private static class MaxHeap{ ?F(t`0=
IgptiZ7~!
void init(int[] data){ 8T&m{s
this.queue=new int[data.length+1]; sog?Mvoq
for(int i=0;i queue[++size]=data; OJbY\U
fixUp(size); deda=%w0
} o5BOe1_Pw
} $qP9EZ]JC
RRV@nDf
private int size=0; P7 (&*=V
S]K^wj[
private int[] queue; 85w D<bN27
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public int get() { wI#rAx7f-
return queue[1]; E@0wt^
} ag:#82C
X.j#??
public void remove() { f*NtnD=rJ
SortUtil.swap(queue,1,size--); i._d^lR\t
fixDown(1); vTh-I&}:
} [<1i[\^
file://fixdown 3P^eD:) w
private void fixDown(int k) { j;VYF
int j; r1}7Q7-z
while ((j = k << 1) <= size) { 3|/ ;`KfQ
if (j < size %26amp;%26amp; queue[j] j++; lY?TF
if (queue[k]>queue[j]) file://不用交换 X'7 T"5!
break; $Z.c9rY1
SortUtil.swap(queue,j,k); Y^2Ma878
k = j; 5NJ@mm{0
} UF,T
} vkc(-n
private void fixUp(int k) { 4JU#3
while (k > 1) { i*.Z~$
int j = k >> 1; zw\"!=r^
if (queue[j]>queue[k]) \8ulX>]
break; ~AjbF(Ad
SortUtil.swap(queue,j,k); QTcngv[
k = j; Y49kq}
} &fiDmUxj
} )Qw|)='-
[GU!],Y
} _L%/NXu,
|n01T_Z)P
} *v8Cj(69
=1VY/sv
SortUtil： IW6;ZDP
/bt@HFL|`
package org.rut.util.algorithm; @<>](4D
JeWW~y`e?{
import org.rut.util.algorithm.support.BubbleSort; 5C#&vYnq
import org.rut.util.algorithm.support.HeapSort; /3FC@?l w4
import org.rut.util.algorithm.support.ImprovedMergeSort; :_)Xe*O
import org.rut.util.algorithm.support.ImprovedQuickSort; dH#o11[
import org.rut.util.algorithm.support.InsertSort; rf1-E57#
import org.rut.util.algorithm.support.MergeSort; _Xsn1
import org.rut.util.algorithm.support.QuickSort; (a&.Ad0{
import org.rut.util.algorithm.support.SelectionSort; A3C<9wXx
import org.rut.util.algorithm.support.ShellSort; UCvMW*gs
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/** :S~XE
* @author treeroot 2s|[!:L5
* @since 2006-2-2 ${6 ;]ye
* @version 1.0 z4UeUVfZ}
*/ )JeiTh^
public class SortUtil { lYQcQ*-
public final static int INSERT = 1; ME0ivr*=:
public final static int BUBBLE = 2; ,h8)5Mj/J
public final static int SELECTION = 3; ?>4^e:
public final static int SHELL = 4; 5x=tOR/h
public final static int QUICK = 5; |{t}ULc
public final static int IMPROVED_QUICK = 6; ~yB[}BPf
public final static int MERGE = 7; ',J3^h!b
public final static int IMPROVED_MERGE = 8; }{j[
public final static int HEAP = 9; ?B@iBOcu[
O23f\pm&
public static void sort(int[] data) { vERsrg;(
sort(data, IMPROVED_QUICK); z'fGHiX7.0
} m(*CuM[E
private static String[] name={ N9,n/t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U{i9h6b"18
}; |_!xA/_U'T
D{a{$Pr
private static Sort[] impl=new Sort[]{ P(A%z2Ql
new InsertSort(), "xnek8F
new BubbleSort(), {#>@h7
new SelectionSort(), ]%shs
new ShellSort(), }tc,3>/
new QuickSort(), ]J_Dn\
new ImprovedQuickSort(), Bv3?WW
new MergeSort(), ~~'XY(\L@
new ImprovedMergeSort(), QJOP*<O
new HeapSort() mP3:Fc_G
}; b$.N8W%
Ao?H.=#y
public static String toString(int algorithm){ WmOd1
return name[algorithm-1]; 8.]dThaq
} 9dy"Y~c
NoDq4>
public static void sort(int[] data, int algorithm) { GW.s\8w
impl[algorithm-1].sort(data); n#Z6d`
} \*d@_oQ$
1*;?uC\
public static interface Sort { 0+cRUH9Ew
public void sort(int[] data); o` ,&yq.
} kTs)u\r.
RQ}x7</{
public static void swap(int[] data, int i, int j) { t2tH%%Rs
int temp = data; UI>-5,X
data = data[j]; wQ(ME7t
data[j] = temp; /M B0%6m
} .^P^lQT]>
} 4lvo9R