[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; ]g?G0m
} _IpW&
int i1=l; (2qo9j"j/Y
int i2=mid+1; D"1ciO8^I]
for(int cur=l;cur<=r;cur++){ ]]%C\Ryy}
if(i1==mid+1) 5Y9 j/wA
data[cur]=temp[i2++]; !2&h=;i~V
else if(i2>r) k7y!!AV
data[cur]=temp[i1++]; 62vz 'b
else if(temp[i1] data[cur]=temp[i1++]; JI\u -+BE
else sMO3eNLn
data[cur]=temp[i2++]; _\o +9X!
} @Gn9x(?J
} B)^]V<l(w
$a5K
} U7x}p^B9\N
H`@x5RjS
改进后的归并排序: miN(a; Q2P
hr6f}2
package org.rut.util.algorithm.support; toIljca
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import org.rut.util.algorithm.SortUtil; uF(-h~
pM VeUK?
/** 8KoPaq
* @author treeroot KQW
* @since 2006-2-2 iv;;GW{2
* @version 1.0 $/wr?
*/ |Z2_1( ku
public class ImprovedMergeSort implements SortUtil.Sort { Ld`~^<B
)XO2DY1/&
private static final int THRESHOLD = 10; R!$j_H
_TX.}167;-
/* /Zv}u
* (non-Javadoc) VCc4nn#
* U}Hmzb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M>I}^Zp!
*/ +%gh?
public void sort(int[] data) { >)S a#w;
int[] temp=new int[data.length]; ]Uxx_1$,
mergeSort(data,temp,0,data.length-1); PVtQ&m$y
} .+[[m$J
)UJ]IB-Q|1
private void mergeSort(int[] data, int[] temp, int l, int r) { ^jCkM29eu
int i, j, k; i1G}mYz_
int mid = (l + r) / 2; (4c<0<"$
if (l == r) UJ6WrO5#kB
return; NWNgh/9?
if ((mid - l) >= THRESHOLD) W BiBtU
mergeSort(data, temp, l, mid); g?@(+\W
else Z.R^@@RqJ
insertSort(data, l, mid - l + 1); <,cDEN7
if ((r - mid) > THRESHOLD) 8@$QN4^u^
mergeSort(data, temp, mid + 1, r); $rjv4e}7
else @[JQCQ#r
insertSort(data, mid + 1, r - mid); D%50
n7{c0;)$
for (i = l; i <= mid; i++) { +JQN=nTA
temp = data; <w,aS;v6jp
} +qS$t
for (j = 1; j <= r - mid; j++) { $W0lz#s:
temp[r - j + 1] = data[j + mid]; Jn:GqO
} Y,&)%Eo<
int a = temp[l]; Z3#3xG5pl
int b = temp[r]; Tp0Tce/
for (i = l, j = r, k = l; k <= r; k++) { 92} ,A`=
if (a < b) { ZGp8$Y>r
data[k] = temp[i++]; Y+G4:
a = temp; ul% q6=f)
} else { TkQ05'Qc
data[k] = temp[j--]; 3cOXtDV YT
b = temp[j]; *YDx6\><
} }D|"$*
} :W'1Q2
} ^rxXAc[
LL,~&5{
/** v=X\@27= ?
* @param data mY%PG
* @param l a!>AhOk.
* @param i 8\ :T*u3
*/ "kN5AeRg
private void insertSort(int[] data, int start, int len) { Y}Qu-fm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }S42.f.p
} 7v\OS-
} khEHMvVH
} *?i~AXJm
} n ~ =]/
n$~RgCf
堆排序： 12rr:(#%s
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package org.rut.util.algorithm.support; k'u2a
#U6Wv1H{Lp
import org.rut.util.algorithm.SortUtil; OY@/18D<>
f:HRrKf9
/** zfxxPL'
* @author treeroot KD#ip3
* @since 2006-2-2 \GPWC}V\s
* @version 1.0 Cjwg1?^RZ
*/ F!Nx^M1
public class HeapSort implements SortUtil.Sort{ h7%<
A).wjd(_,
/* (non-Javadoc) (F#Qunze
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]p$fEW g
*/ _/PjeEm $p
public void sort(int[] data) { `|]juc
MaxHeap h=new MaxHeap(); M\T6cN@m
h.init(data); W;hI[9
for(int i=0;i h.remove(); r?[Zf2&
System.arraycopy(h.queue,1,data,0,data.length); :KW
} &0N 3 p
y|1-,u.$
private static class MaxHeap{ #&$4tTl
i*F^;-q)
void init(int[] data){ 3tgct <"
this.queue=new int[data.length+1]; tF=96u_X
for(int i=0;i queue[++size]=data; -o=qYkyLK
fixUp(size); 1o.]"~0:
} -1U]@s
} gIT"nG=a4
7@06x+!
private int size=0; Aw >DZ2
'Z;R!@Dm
private int[] queue; 7<X_\,I
kkh#VGh"
public int get() { *78TT\q<
return queue[1]; .PF~8@1ju
} Plt~l3_
SVeL c
public void remove() { zvSfW# *
SortUtil.swap(queue,1,size--); 6LUB3;g7
fixDown(1); G0<m3 Up
} CbwQ'c$}
file://fixdown C~kw{g+|
private void fixDown(int k) { !v$hqNt7
int j; Z(CzU{7c
while ((j = k << 1) <= size) { \GBv@
if (j < size %26amp;%26amp; queue[j] j++; x.}iSE{
if (queue[k]>queue[j]) file://不用交换 Uv.{=H:
break; KZ&8aulP
SortUtil.swap(queue,j,k); 0~"{z>s '
k = j; <sn^>5Ds
} $,bLb5}Qu
} *y u|]T
private void fixUp(int k) { %}2 s74D*Z
while (k > 1) { o_jVtEP
int j = k >> 1; _>*TPlB
if (queue[j]>queue[k]) 9'T nR[>
break; -R|v&h%T
SortUtil.swap(queue,j,k); j].XVn,
k = j; VYik#n>|Gp
} PYW~x@]k%,
} {QJJw}!#
_?mu2!X
} V\4'Hd
'V } -0
} Z+FJ cvYx
[N.4i" Cd
SortUtil： FzW7MW>\x
8)'OXR0/
package org.rut.util.algorithm; 1;S@XC>
;5dJ5_}
import org.rut.util.algorithm.support.BubbleSort; Pv/$;R%
import org.rut.util.algorithm.support.HeapSort; <08)G7
import org.rut.util.algorithm.support.ImprovedMergeSort; >'7Icx
import org.rut.util.algorithm.support.ImprovedQuickSort; 8,=,'gFO
import org.rut.util.algorithm.support.InsertSort; #sN]6
import org.rut.util.algorithm.support.MergeSort; #8rLB(
import org.rut.util.algorithm.support.QuickSort; >pUR>?t"
import org.rut.util.algorithm.support.SelectionSort; CKy' 8I9
import org.rut.util.algorithm.support.ShellSort; 8)/d8@
J?LetyDNr]
/** O_*%_S}F&
* @author treeroot 3Vs8"BFjz
* @since 2006-2-2 0.=dOz r
* @version 1.0 N-y[2]J90
*/ "V}WV!w
public class SortUtil { |!,;IoZ
public final static int INSERT = 1; 1F{c5
public final static int BUBBLE = 2; X8"4)IZ3
public final static int SELECTION = 3; Z`T]jm-3
public final static int SHELL = 4; =YOq0
public final static int QUICK = 5; 5$d>:" >
public final static int IMPROVED_QUICK = 6; /&_$+Iun
public final static int MERGE = 7; MA6(VII
public final static int IMPROVED_MERGE = 8; )pbsvR_
public final static int HEAP = 9; nD{o8;
jH({Qc,97
public static void sort(int[] data) { fX2sjfk
sort(data, IMPROVED_QUICK); #Ipi3
} Vo"Wr>F
private static String[] name={ pE,2pT2>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E{k$4
}; 9$$dSN\&
]{s0/(EA
private static Sort[] impl=new Sort[]{ TD!--l*gL
new InsertSort(), SYkwM6
new BubbleSort(), ~}pc&jz>q
new SelectionSort(), _Dr9 w&;<
new ShellSort(), 8BE] A_X
new QuickSort(), %|AebxB'o
new ImprovedQuickSort(), jmPnUn
new MergeSort(), |Bz1u|uc
new ImprovedMergeSort(), [;t-XC?[nk
new HeapSort() J2adG+=
}; 9sG]Q[:.]
xy))}c%
public static String toString(int algorithm){ FUzN}"\1
return name[algorithm-1]; ~@=(#tO.
} n+MWny
4Oo{\&(
public static void sort(int[] data, int algorithm) { z?dd5.k
impl[algorithm-1].sort(data); `i`+yh>pc#
} `%;Hj _X}
$>Qq 7
public static interface Sort { g&z8t;@
public void sort(int[] data); E@,m+
} N,W ?}
'HKDGQl`
public static void swap(int[] data, int i, int j) { d^MRu#]
int temp = data; 'b)qP|
data = data[j]; DK)T2{:
data[j] = temp; 6S`0<Z;;/
} %5RR<[_/;
} 3{$vN).