[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; ~6YMD
} UT0){%2@
int i1=l; [NMVoBvG
int i2=mid+1; a.N{-2ptH
for(int cur=l;cur<=r;cur++){ FMA6_fju4
if(i1==mid+1) 7x);x/#8Z
data[cur]=temp[i2++]; kF(n!2"W
else if(i2>r) 7lV.[&aKW
data[cur]=temp[i1++]; i4Lc$20?d
else if(temp[i1] data[cur]=temp[i1++]; #7ohQrP
else [e[<p\]
data[cur]=temp[i2++]; I9h ?;(
} $odso;Hn
} LUB${0BrA
Guz"wY
} h2ytS^
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改进后的归并排序: %\]*OZ7
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package org.rut.util.algorithm.support; wLK07e(
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import org.rut.util.algorithm.SortUtil; A,sr[Pa@
V|(H|9
/** .<@8gNm3
* @author treeroot #@<9S{F
* @since 2006-2-2 kuyjnSo9i
* @version 1.0 jCbV,0)^
*/ _SW3_8SuM.
public class ImprovedMergeSort implements SortUtil.Sort { BauU{:Sh
C8 \5A8c
private static final int THRESHOLD = 10; DL$@?.?I
:#@= B]
/* 7}M2bH} \K
* (non-Javadoc) PDs@?nz,
* $Y69@s%f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;)N>t\v
*/ '>r7V
public void sort(int[] data) { EoK~S\dS
int[] temp=new int[data.length]; 94B\5I}
mergeSort(data,temp,0,data.length-1); hzkcP
} 'yMF~r3J
yKO`rtP
private void mergeSort(int[] data, int[] temp, int l, int r) { +$g}4
int i, j, k; <HbcNE~
int mid = (l + r) / 2; ``wSc0\
if (l == r) u~A6bK*
return; ,l<6GB2\
if ((mid - l) >= THRESHOLD) uEX!xx?Q#
mergeSort(data, temp, l, mid); JvY}-}?c
else H$y-8-&)
insertSort(data, l, mid - l + 1); 0`^&9nR
if ((r - mid) > THRESHOLD) yUpgoX(6
mergeSort(data, temp, mid + 1, r); FCnm1x#
else H1} RWaJ
insertSort(data, mid + 1, r - mid); #O+),,WS
)c `7( nY
for (i = l; i <= mid; i++) { C=eF.FB;'
temp = data; yu;P +G
} Hy^N!rBxfO
for (j = 1; j <= r - mid; j++) { 4^M
temp[r - j + 1] = data[j + mid]; gLOEh6
} AvfNwE
int a = temp[l]; y&V@^"`
int b = temp[r]; 9I4K}R
for (i = l, j = r, k = l; k <= r; k++) { rk #sy$
if (a < b) { ax(c#
data[k] = temp[i++]; V#iPj'*
a = temp; V,%=AR5
} else { S:OO0<W
data[k] = temp[j--]; xL\0B,]
b = temp[j]; thI F&
} >r!|sC
} $m/)FnU/
} ZjF 4v
oz,e/v8~
/** s,]z[qB#$
* @param data zx)z/1
* @param l +mn,F};
* @param i Le\?+h42>
*/ HhvdqvIEG
private void insertSort(int[] data, int start, int len) { x^y'P<ypw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y!_C/!d
} -4 SY=NC_
} @0/+_2MH-
} PK`D8)=u
} t+!$[K0/
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堆排序： ^zQ/mo,Z
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package org.rut.util.algorithm.support; a6uJYhS~
|>dI/_'
import org.rut.util.algorithm.SortUtil; =w{Z@S(ukz
?`PvL!'
/** lE4HM$p
* @author treeroot _sTROd)Vh
* @since 2006-2-2 =`H@%
* @version 1.0 'F9jq
*/ tM'P m
public class HeapSort implements SortUtil.Sort{ ,,q10iF
9-fLz?J
/* (non-Javadoc) Xg;}R:g '
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }khV'6"'|
*/ ~v|>xqWV
public void sort(int[] data) { 2*^j
MaxHeap h=new MaxHeap(); xD~5UER
h.init(data); DK:o]~n
for(int i=0;i h.remove(); q1d}{DU
System.arraycopy(h.queue,1,data,0,data.length); [J?aD`{#O
} F^];U+J
<+?7H\b
private static class MaxHeap{ mc? Vq
;'#8tGv=
void init(int[] data){ woGAf)vV#
this.queue=new int[data.length+1]; 0"28'
for(int i=0;i queue[++size]=data; 9 a!$z!.
fixUp(size); x"~8*V'0
} .uMn0PE
} o<pf#tifv
+|n*b
private int size=0; z`f($t[
l)1r+@)\
private int[] queue; /rnu<Q#iH
f'EuY17w
public int get() { l3ko?k
return queue[1]; -z)n?(pftm
} Z8K?
42$VhdG
public void remove() { Ch<[l8;K
SortUtil.swap(queue,1,size--); "&G/T ?4
fixDown(1); Ku5\]
} ,9zjFI
file://fixdown #P0&ewy
private void fixDown(int k) { Whm,F^
int j; ) l:[^$=,
while ((j = k << 1) <= size) { iJ1"at
if (j < size %26amp;%26amp; queue[j] j++; 3TeY%5iVt
if (queue[k]>queue[j]) file://不用交换 O;:mCt _H
break; (MxQ+D\
SortUtil.swap(queue,j,k); MOQ*]fV:
k = j; v$?+MNks
} | *2w5iR
} "n(hfz0y%
private void fixUp(int k) { $P/~rZ@M@
while (k > 1) { Vc\MV0lr
int j = k >> 1; rWa2pO
if (queue[j]>queue[k]) W$hx,VEy`
break; Yg%I?
SortUtil.swap(queue,j,k); v&DI`xn~
k = j; w0rRSD4S8B
} V5V bJBpf
} /Kql>$I
h-q3U%R4}@
} [9evz}X
fI?>+I5
} C~,a!qY
EE&K0<?T|:
SortUtil： 1"MhGNynB>
riY~%9iV'
package org.rut.util.algorithm; {FeDvhv
t5\-v_mG=&
import org.rut.util.algorithm.support.BubbleSort; Cjm`|~&e+
import org.rut.util.algorithm.support.HeapSort; .o(fe\KHf
import org.rut.util.algorithm.support.ImprovedMergeSort; &Cr:6W@A
import org.rut.util.algorithm.support.ImprovedQuickSort; _n0CfH.v
import org.rut.util.algorithm.support.InsertSort; }~e8e
import org.rut.util.algorithm.support.MergeSort; ,<(}|go
import org.rut.util.algorithm.support.QuickSort; :}'=`wa
import org.rut.util.algorithm.support.SelectionSort; >%}C^gu)
import org.rut.util.algorithm.support.ShellSort; 6m*QX+
]b2pG'
/** ^a0um/+M}
* @author treeroot EN<F# Y3E
* @since 2006-2-2 JVvs-bK5
* @version 1.0 Ns>- o
*/ +~m46eI
public class SortUtil { N)uSG&S:
public final static int INSERT = 1; 6Zm# bFQ
public final static int BUBBLE = 2; q;T{|5/O
public final static int SELECTION = 3; s4X>.ToMC
public final static int SHELL = 4; k:t]s_`<
public final static int QUICK = 5; e'6/`Evqz
public final static int IMPROVED_QUICK = 6; aH)}/n
public final static int MERGE = 7; Hq'`8f8N
public final static int IMPROVED_MERGE = 8; PxWT1 !
public final static int HEAP = 9; e24WW^S
o[Q MTP
public static void sort(int[] data) { (y=C_wvqZ
sort(data, IMPROVED_QUICK); 3oF45`3FV
} BTqS'NuT
private static String[] name={ ! `
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ] {RDVA=]
}; ;w{tv($$
T"{>t
private static Sort[] impl=new Sort[]{ S'Q@ScJ
new InsertSort(), SD"FErJ
new BubbleSort(), &FMc?wq
new SelectionSort(), QO<jI#
new ShellSort(), `06;
new QuickSort(), jl4rbzse
new ImprovedQuickSort(), K -nF lPm\
new MergeSort(), 2J7:\pR^
new ImprovedMergeSort(), d[@X%
new HeapSort() {j.bC@hWw
}; Ec3}_`
|7'df&CA
public static String toString(int algorithm){ *v;2PP[^
return name[algorithm-1]; CM/H9Kz.
} $O&b``
9&-dTayIz
public static void sort(int[] data, int algorithm) { Sq>dt[7
impl[algorithm-1].sort(data); cvn@/qBq*t
} "%`1]Fr
dU&a{$ku[
public static interface Sort { <Th6r.#?
public void sort(int[] data); yZ0-wI
} g!g#]9j
,?J!
public static void swap(int[] data, int i, int j) { |^&b8
int temp = data; ?&8^&brwG
data = data[j]; {fPy=,>Nb
data[j] = temp; f(>p=%=O
} J{.{f
} 0.`/X66;V