[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; mqk(UOK`
} ' P`p.5nH
int i1=l; KV}U{s+U8
int i2=mid+1; 19 wqDIE0
for(int cur=l;cur<=r;cur++){ c4>sE[]
if(i1==mid+1) .xkV#ol
data[cur]=temp[i2++]; #r.` V!=
else if(i2>r) #oJbrh9J6
data[cur]=temp[i1++]; _~ZQ b
else if(temp[i1] data[cur]=temp[i1++]; xPMyG);
else _:X|R#d
data[cur]=temp[i2++]; ?ZHE8
} ?h)3S7
} I49l2>
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} ix7 e])m(
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改进后的归并排序: YD46Z~$
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package org.rut.util.algorithm.support; ?ey&Un"
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import org.rut.util.algorithm.SortUtil; `x$}~rP&)!
x)VIA]
/** ;5Vk01R
* @author treeroot G:c8`*5Q
* @since 2006-2-2 8#]7`o
* @version 1.0 )xvx6?Ah|
*/ ^UvK~5tBV
public class ImprovedMergeSort implements SortUtil.Sort { 9MB\z"b?A
T]#,R|)d
private static final int THRESHOLD = 10; zz 'dg-F
vN,}aV2nq
/* _A,-[*OKI
* (non-Javadoc) 0^y@p&;/.
* O<dZA=Oez
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p~q_0Pg%
*/ RUk<=!U
public void sort(int[] data) { #i+P(xV
int[] temp=new int[data.length]; Qw<kX*fxrI
mergeSort(data,temp,0,data.length-1); [pW1=tI
} ,/?%y\:J
@ojg`!,
private void mergeSort(int[] data, int[] temp, int l, int r) { 9IvcKzS2
int i, j, k; RZd4(7H=q
int mid = (l + r) / 2; 7"n1it[RJ8
if (l == r) sh !~T<yy
return; W?^8/1U
if ((mid - l) >= THRESHOLD) qXB03}] G
mergeSort(data, temp, l, mid); ? gA=39[j
else ~w1{zxs
insertSort(data, l, mid - l + 1); fsrg2:kQ
if ((r - mid) > THRESHOLD) +(<n |~
mergeSort(data, temp, mid + 1, r); <RoX|zJw
else +f\pk \Ith
insertSort(data, mid + 1, r - mid); RUS7Z~5
A&|Wvb=
for (i = l; i <= mid; i++) { K/wiL69
temp = data; X40la_[.
} hINnb7o
for (j = 1; j <= r - mid; j++) { Q.9Ph ~
temp[r - j + 1] = data[j + mid]; jTd4H)
} S< EB&P
int a = temp[l]; Qh|-a@
int b = temp[r]; xxLgC;>[
for (i = l, j = r, k = l; k <= r; k++) { _b!;(~@p
if (a < b) { xH"W}-#[
data[k] = temp[i++]; ?GUz?'d
a = temp; Siz!/O!'
} else { r*i$+ Z
data[k] = temp[j--]; kMl@v`
b = temp[j]; 6+Wr6'kuH
} .*EOVo9S
} 6bbZ<E5At
} ,5eH2W
;&+[W(7Sy
/** Sv~YFS :oy
* @param data V@#*``M,3
* @param l *R_'$+
* @param i >9o,S3
*/ z"6ZDC6
private void insertSort(int[] data, int start, int len) { (#j2P0B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gut J_2f^9
} O1x0[sy
} aCU7w5
} -5V)q.Og
} e;A^.\SP
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堆排序： A*7Io4e!
gx!*O<|e4
package org.rut.util.algorithm.support; ASzzBR;?_
^8?j~&u$F
import org.rut.util.algorithm.SortUtil; ="3a%\
(orrX Ez
/** |5oKq'(b
* @author treeroot {yvb$ND|j{
* @since 2006-2-2 Y!++CMzU
* @version 1.0 QL)>/%yU
*/ 1DEO3p
public class HeapSort implements SortUtil.Sort{ <a8#0ojm
WF ?/GN
/* (non-Javadoc) T!u'V'Ei2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zW"~YaO%C
*/ a. h?4+^bN
public void sort(int[] data) { xa87xX=a
MaxHeap h=new MaxHeap(); o &BPG@n
h.init(data); OW+e_im}
for(int i=0;i h.remove(); v}7@CP]nV
System.arraycopy(h.queue,1,data,0,data.length); [c&2i`C
} x @1px&^
tWpl`HH
private static class MaxHeap{ KI Ek/]<H
gCv"9j<j
void init(int[] data){ Dk)@>l:gI,
this.queue=new int[data.length+1]; 8ivRp<9
for(int i=0;i queue[++size]=data; :D"@6PC]
fixUp(size); ;Y Dv.I
} )8pcf`h{
} uk`T+@K
zc6Ho
private int size=0; !"g=&Uy&
(bg}an
private int[] queue; i Td-n9
L7SEswMti
public int get() { jg~_'4f#
return queue[1]; u$WBc\j
} CnabD{uTf
oJP<'l1
public void remove() { ?Wwh _TO
SortUtil.swap(queue,1,size--); x Z|&/Ci
fixDown(1); =y?#^
} h6g=$8E
file://fixdown NNwc!x)*
private void fixDown(int k) { (N,nux(0k
int j; )r ULT$;i@
while ((j = k << 1) <= size) { $GQphXb$
if (j < size %26amp;%26amp; queue[j] j++; 0(wf{5
if (queue[k]>queue[j]) file://不用交换 uVN.=
break; >HE,'
SortUtil.swap(queue,j,k); 4Z*|Dsw
k = j; riID,aut
} @Ppo &>
} N g58/}zO
private void fixUp(int k) { y&7YJx
while (k > 1) { .j:i&j(
int j = k >> 1; joe9.{
if (queue[j]>queue[k]) 2*+3RrJ
break; JYPxd~T/-
SortUtil.swap(queue,j,k); 2bWUa~%B
k = j; -r!42`S
} ]x1p!TSU
} K6E}";;
"cwR^DoD&
} f:xUPH?+
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} i#k-)N _$
H\ 3M
SortUtil： *]5z^> q;7
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package org.rut.util.algorithm; ,NDh@VYe
:#WEx_]
import org.rut.util.algorithm.support.BubbleSort; >b'w'"
import org.rut.util.algorithm.support.HeapSort; S0F@#mSQ?
import org.rut.util.algorithm.support.ImprovedMergeSort; fVYiwE=F
import org.rut.util.algorithm.support.ImprovedQuickSort; LaDY`u0G%
import org.rut.util.algorithm.support.InsertSort; 9J?W '8s5
import org.rut.util.algorithm.support.MergeSort; PCtkjd
import org.rut.util.algorithm.support.QuickSort; kg:l:C)Tq
import org.rut.util.algorithm.support.SelectionSort; Te+^J8
import org.rut.util.algorithm.support.ShellSort; H-185]7
Yr+d1(
/** N3ZiGD
* @author treeroot [6_"^jgH
* @since 2006-2-2 N?$7Z v[G
* @version 1.0 M2dmG<
*/ q?yMa9ZZky
public class SortUtil { i!L;? `F{
public final static int INSERT = 1; uMHRUi
public final static int BUBBLE = 2; j$+gq*I&E
public final static int SELECTION = 3; d4J<,
public final static int SHELL = 4; tR<L`?4
public final static int QUICK = 5; |-n ('gQ[
public final static int IMPROVED_QUICK = 6; e[}],W
public final static int MERGE = 7; t~ -J %$
public final static int IMPROVED_MERGE = 8; m*gj|1k
public final static int HEAP = 9; E[UO5X
u^l*5F%DK
public static void sort(int[] data) { 7gm:ZS
sort(data, IMPROVED_QUICK); <9`?Z-lJP
} _e*c
private static String[] name={ mY`@'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3q"7K
}; SBX|Bcyk*
Yc d3QRB
private static Sort[] impl=new Sort[]{ rhIGOk1k
new InsertSort(), ]/_G-2.R
new BubbleSort(), ~6kJ~R4
new SelectionSort(), [%jxf\9jJ_
new ShellSort(), FOSbe]
new QuickSort(), ) oxIzF
new ImprovedQuickSort(), QNb>rLj52
new MergeSort(), dhW<p5
new ImprovedMergeSort(), ge$LIsE8
new HeapSort() (`pNXQ0n
}; Ra0=q4vdk
@89I#t6A.
public static String toString(int algorithm){ !y%+GwoW
return name[algorithm-1]; jXWNHIl)@
} pisB,wP$2
7 W{~f?Sh
public static void sort(int[] data, int algorithm) { #d% vT!Bz~
impl[algorithm-1].sort(data); g?V&mu
} Y9tV%
UW/N MjK
public static interface Sort { k-Fdj5/
public void sort(int[] data); gfm;xT/y
} [fxuUmU
q3)wr%!k5D
public static void swap(int[] data, int i, int j) { ]H+{eJB7O
int temp = data; \B&6TeR
data = data[j]; Xem5@ (u
data[j] = temp; H} 6CKP}
} {`F1u?l
} ,gmH2.