[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 eEhe
} FM]clC;X?
int i1=l; :6n4i$
int i2=mid+1; [I;C6p
for(int cur=l;cur<=r;cur++){ _'p/8K5)=
if(i1==mid+1) @(R=4LL
data[cur]=temp[i2++]; A&}]:4@{
else if(i2>r) lz^Vi!|p
data[cur]=temp[i1++]; m mF0RNE
else if(temp[i1] data[cur]=temp[i1++]; 7[e-3
else r'noB<|e
data[cur]=temp[i2++]; O%%Q./oh
} 1 -Z&/3T]
} 8P]nO+
bI.hG32
} `yR/M"u6T
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改进后的归并排序: ~,,r\Y+
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package org.rut.util.algorithm.support; {?Slo5X|
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import org.rut.util.algorithm.SortUtil; a3n Wt
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/** v:lkvMq|=
* @author treeroot Q 1i5"'][
* @since 2006-2-2 M|nLD+d~8
* @version 1.0 drpx"d[c
*/ qFVZhBC
public class ImprovedMergeSort implements SortUtil.Sort { @Ez>?#z
<hzHrx'o{
private static final int THRESHOLD = 10; H2iIBGu|L
Zzlt^#KLx
/* f (C:J[;Z
* (non-Javadoc) 5]mH.{$x$?
* =pzTB-G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B<~AUf*y
*/ J"#6m&R_q
public void sort(int[] data) { sudh=_+>
int[] temp=new int[data.length]; :@p]~{m:G
mergeSort(data,temp,0,data.length-1); q AVypP?J
} pZ $>Hh#
/#5rt&q
private void mergeSort(int[] data, int[] temp, int l, int r) { 46M=R-7=
int i, j, k; kM-8%a2i
int mid = (l + r) / 2; iwIn3R,
if (l == r) 5X8 i=M;
return; C{U*{0}
if ((mid - l) >= THRESHOLD) b+Sj\3fX
mergeSort(data, temp, l, mid); =ZSYg K
else "[/W+&z[~
insertSort(data, l, mid - l + 1); T6SYXQd>.
if ((r - mid) > THRESHOLD) ?i_2ueVR
mergeSort(data, temp, mid + 1, r); #++:`Z
else =H: N!!:
insertSort(data, mid + 1, r - mid); &R/-~w5
;=0-B&+v
for (i = l; i <= mid; i++) { gWro])3
temp = data; DI/d(oFv`
} "z6p=B"?3
for (j = 1; j <= r - mid; j++) { {%6 '|<`[
temp[r - j + 1] = data[j + mid]; nYC.zc*ox
} `4ga~Ch
int a = temp[l]; 0^L:`[W+
int b = temp[r]; UQhD8Z'I.
for (i = l, j = r, k = l; k <= r; k++) { &'neOf/~
if (a < b) { p%Q{Rqc)
data[k] = temp[i++]; 'xEomo#
a = temp; )%9:k9
} else { Ur[ai6LNG
data[k] = temp[j--]; /_JR7BB^X,
b = temp[j]; /:-ig .YY
} oGXcu?ft
} C(sz/x?11
} }<z[t5
EGRIhnED#
/** 3Zz_wr6
* @param data p]e.E`'S
* @param l 7h.[eMLPB
* @param i /2r&ga&
*/ W`[7|8(6!
private void insertSort(int[] data, int start, int len) { $v8T%'p+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .|:(VG$MfI
} D41.$t[
} -R$Q`Xw
} #p{8
} gjJ:s,Fg
dF|n)+C~R
堆排序： 2#R0Bd
%}
package org.rut.util.algorithm.support; 5OTZa>H
YYe<StyH
import org.rut.util.algorithm.SortUtil; .F/l$4CQ
.lgm"
/** aTaL|&(
* @author treeroot zYis~+
* @since 2006-2-2 V+u0J"/8
* @version 1.0 H_iQR9Ak7
*/ 98|1K>C
public class HeapSort implements SortUtil.Sort{ m9'bDyyK
b^~4k; <
/* (non-Javadoc) !(_qM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T[ zEAj
*/ C]zG@O!
public void sort(int[] data) { .%\R L/
MaxHeap h=new MaxHeap(); Z'wGZ(
h.init(data); <P5 7s+JK
for(int i=0;i h.remove(); ?;rRR48T9E
System.arraycopy(h.queue,1,data,0,data.length); uY&t9L8
} yTWicW7i
|UQGZ
private static class MaxHeap{ rB =c
bM,%+9oz;
void init(int[] data){ q) e*eN
this.queue=new int[data.length+1]; C7l4X8\w
for(int i=0;i queue[++size]=data; ;0dl
fixUp(size); fHF*#
} SG)|4$"
} 5N#Sic M
4g+o/+6!4
private int size=0; YQ-V^e6
w\>@>*E>
private int[] queue; :<6gP(
dsZ-|C
public int get() { xqj@T^y
return queue[1]; `$] ZT>&
} 69Q#UJ
P.Qz>c^-C
public void remove() { p+F>+OQ*
SortUtil.swap(queue,1,size--); za5E{<0
fixDown(1); E`q)vk
} Zx|VOl,;
file://fixdown 'Y5l3xQk
private void fixDown(int k) { \2[
int j; )jH|j
while ((j = k << 1) <= size) { fp$U%uj
if (j < size %26amp;%26amp; queue[j] j++; 5Noy~;
if (queue[k]>queue[j]) file://不用交换 E>1%7" i<
break; <OGXKv@
SortUtil.swap(queue,j,k); Hy2~D:34
k = j; $*+`;PG-
} #PMi6q~Z
} : UDh{GQ*
private void fixUp(int k) { eq4Yc*|9
while (k > 1) { `_.(qg
int j = k >> 1; KD8,a+GL
if (queue[j]>queue[k]) )VkH':yCM
break; pq*4yaTT'
SortUtil.swap(queue,j,k); QqB9I-_
k = j; SuJ4)f;'0
} . L]!*
} R5rCCp
;TCT%j`^o
} %H7H0%qW
82w=t
} Ft 2u&Rtx
6z1>(Za7>
SortUtil： I~>Ye<g#
q=/ck
package org.rut.util.algorithm; e`t-:~'
i/q1>
import org.rut.util.algorithm.support.BubbleSort; /~_,p,:aP
import org.rut.util.algorithm.support.HeapSort; MOu=
import org.rut.util.algorithm.support.ImprovedMergeSort; uVLKR PY
import org.rut.util.algorithm.support.ImprovedQuickSort; I:o.%5)
import org.rut.util.algorithm.support.InsertSort; {GQRJ8m
import org.rut.util.algorithm.support.MergeSort; c~n:xblv
import org.rut.util.algorithm.support.QuickSort; , n47.S
import org.rut.util.algorithm.support.SelectionSort; y(=$z/
import org.rut.util.algorithm.support.ShellSort; !WQS.&
aF:|MTC(~
/** W< :7z
* @author treeroot 52z{
* @since 2006-2-2 p7]V1w:
* @version 1.0 eGlPi|
*/ Hge0$6l
public class SortUtil { hD>cxo
public final static int INSERT = 1; bLyaJ%pa\/
public final static int BUBBLE = 2; ,(Nr_K
public final static int SELECTION = 3; vUgMfy&
public final static int SHELL = 4; vC%8-;8{H
public final static int QUICK = 5; g+/m:(7[s|
public final static int IMPROVED_QUICK = 6; vuNq7V*}
public final static int MERGE = 7; .a]9rQQ&_
public final static int IMPROVED_MERGE = 8; 61&A`
public final static int HEAP = 9; l5CFm8%
5YnTGf&
public static void sort(int[] data) { ^z}$'<D9
sort(data, IMPROVED_QUICK); \[W)[mH_
} z3Q#Wmv2
private static String[] name={ I?Ct@yxhF'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +|TFxaVz
}; Kz2s{y~?
FR? \H"'x
private static Sort[] impl=new Sort[]{ %g{<EuK]p
new InsertSort(), ad,pHJ`
new BubbleSort(), !t!\b9=
new SelectionSort(), &u~#bDh
new ShellSort(), ?Y\hC0a60
new QuickSort(), [X\~J &kD
new ImprovedQuickSort(), l"1at eM3
new MergeSort(), MtKM#@
new ImprovedMergeSort(), /{*0 \`;
new HeapSort() XPsRa[08WK
}; $I:&5o i
*_CzCl^
public static String toString(int algorithm){ < r7s,][&
return name[algorithm-1]; (bo-JOOdY(
} BoHpfx1C
F<LRo}j"9Q
public static void sort(int[] data, int algorithm) { K *xca(6
impl[algorithm-1].sort(data); s8iB>-dk
} 6PdLJ#LS
hmM2c15T5
public static interface Sort { 9@yi UX
public void sort(int[] data); L@>$ Aw
} b_rHt s
?$Jj^/luD
public static void swap(int[] data, int i, int j) { 5!*@gn
int temp = data; {'$+?V"&
data = data[j]; .}ePm(
data[j] = temp; m%)Cw)t 7
} @z1pE@7jK
} 9HBRWh6