[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; MYlPG1X=?
} ta*6xpz-\Q
int i1=l; 2Hp<(
int i2=mid+1; A.v'ws+VDP
for(int cur=l;cur<=r;cur++){ )LdS1%
if(i1==mid+1) o6v'`p'
data[cur]=temp[i2++]; #cAX9LV
else if(i2>r) A*a:#'"*N
data[cur]=temp[i1++]; >!gW]{
else if(temp[i1] data[cur]=temp[i1++]; &^I2NpT
else \7d T]VV
data[cur]=temp[i2++]; 67{3/(`x
} -s!cZ3
} 0sR+@\
|EjMpRNE
} ar%!h~
2," (
改进后的归并排序: R#\o*Ta
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package org.rut.util.algorithm.support; %8]~+#]p
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import org.rut.util.algorithm.SortUtil; !D!1%@ e
,WKWin
/** yQ/E0>Uj!
* @author treeroot N+#lS7
* @since 2006-2-2 B=;pwX
* @version 1.0 HC$rC"f
*/ xV+cX*4h
public class ImprovedMergeSort implements SortUtil.Sort { Q$B\)9`v[
*@-a{T}
private static final int THRESHOLD = 10; AnD#k]
VS\+"TPuH
/* l.Yq4qW
* (non-Javadoc) C"[d bh!
* dJf#j?\[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OV+|j
*/ @@QB,VS;{<
public void sort(int[] data) { ol#4AU`
int[] temp=new int[data.length]; so]p1@K
mergeSort(data,temp,0,data.length-1); "P9SW?',
} W02t6DW
a?NoNv)&
private void mergeSort(int[] data, int[] temp, int l, int r) { =kiDW6 JJU
int i, j, k; 7FYq6wi
int mid = (l + r) / 2; vkK8D#K
if (l == r) c)q'" r
return; '#ow9w+^
if ((mid - l) >= THRESHOLD) -n#fj;.2_
mergeSort(data, temp, l, mid); 1<n'F H3
else j3$\+<m]
insertSort(data, l, mid - l + 1); Ae3=o8p
if ((r - mid) > THRESHOLD) tsys</E&
mergeSort(data, temp, mid + 1, r); "NOll:5"(
else %'3Y?d
insertSort(data, mid + 1, r - mid); rWS],q=c
F./$nwb
for (i = l; i <= mid; i++) { ~z$+uK
temp = data; }Lc8tj<
} ZBxV&.9/
for (j = 1; j <= r - mid; j++) { g5>c-i
temp[r - j + 1] = data[j + mid]; 47yzI-1H+
} BqG7Et
int a = temp[l]; C?-_8OA
int b = temp[r]; $>6Kn`UX
for (i = l, j = r, k = l; k <= r; k++) { +h?Rb3=S
if (a < b) { 8;+dlWp
data[k] = temp[i++]; _WB*ArR
a = temp; CWx_9b zk
} else { 0m>?-/uDx
data[k] = temp[j--]; o7^u@*"F
b = temp[j]; Hr}pO"%
} kgGMA 7Jy
} t}m"rMbt
} "}ZUa~7
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/** :kw14?]_
* @param data K!A;C#b!
* @param l (+w.?l
* @param i {Ip)%uR
*/ 96P3B}Dk
private void insertSort(int[] data, int start, int len) { ;:4PT~\*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z0!yTM/C
} cK _:?G
} nZP%Z=p7
} 2y` :#e`x1
} je`w$ ^w
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堆排序： Q2jl61d_9
?<h|Q~JH
package org.rut.util.algorithm.support; r;'Vy0?AL
1 ,e`,
import org.rut.util.algorithm.SortUtil; m>8tA+K)+)
1WJ%n;
/** ,mm9X\ '
* @author treeroot a0*qK)gH
* @since 2006-2-2 )sBbmct_S
* @version 1.0 6eq`/~#
*/ Y V#|qb
public class HeapSort implements SortUtil.Sort{ =Xu(Js-
jQRl-[n
/* (non-Javadoc) NoD\t(@h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;{S7bH'6m
*/ IKVS7m
public void sort(int[] data) { {q^?Rw
MaxHeap h=new MaxHeap(); \rPT7\ZA
h.init(data); _^Yav.A=
for(int i=0;i h.remove(); y - Ge"mY
System.arraycopy(h.queue,1,data,0,data.length); ; +%|!~
} Y&y5^nG
6fcn(&Qk
private static class MaxHeap{ 4M3{P
f3M~2jbv'p
void init(int[] data){ 6j5?&)xJ
this.queue=new int[data.length+1]; &Rxy]kBA
for(int i=0;i queue[++size]=data; lgei<\6~n5
fixUp(size); g4CdzN~
} xjO((JC
} s\dhQZw3
$bo 5:c
private int size=0; +:m'a5Dm
m~U2L
private int[] queue; eHQ3K#M#
oNa*|CSE>
public int get() { & GM&,
return queue[1]; ~G#^kNme
} 8j%hxAV$
"F8A:tR
public void remove() { 8"2X 8C8
SortUtil.swap(queue,1,size--); aVbv.>
fixDown(1); 9_5tA'Q
} WzxDnd<B
file://fixdown =h/0k y
private void fixDown(int k) { u>I;Cir4
int j; @o6^"
while ((j = k << 1) <= size) { 53jtwklA
if (j < size %26amp;%26amp; queue[j] j++; o;<oXv
if (queue[k]>queue[j]) file://不用交换 Xh*p\ $
break; dab[x@#r>
SortUtil.swap(queue,j,k); ;zZGV4Qc~
k = j; {<}kqn83sT
} Ow7}&\;^-
} {8as _
private void fixUp(int k) { kTe0"
while (k > 1) { ;.wWw" )
int j = k >> 1; km+}./@
if (queue[j]>queue[k]) Ls~F4ar$/
break; EPMdR66
SortUtil.swap(queue,j,k); *[?DnF+
k = j; n^m6m%J)
} M.QXwIT
} _O*"_^6
JkMf+!
} Mk"V%)1k
2~BId&]
} A! j4;=}
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SortUtil： %}%vey
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package org.rut.util.algorithm; Mb#-I GZ
l<l6Ey(
import org.rut.util.algorithm.support.BubbleSort; eE'2B."F
import org.rut.util.algorithm.support.HeapSort; =5yI>A0
import org.rut.util.algorithm.support.ImprovedMergeSort; E*_lT`Hzf
import org.rut.util.algorithm.support.ImprovedQuickSort; gbJz5EEq
import org.rut.util.algorithm.support.InsertSort; }\oy?_8~
import org.rut.util.algorithm.support.MergeSort; {V)Z!D
import org.rut.util.algorithm.support.QuickSort; ctg[C$<q|
import org.rut.util.algorithm.support.SelectionSort; pdQ6/vh
import org.rut.util.algorithm.support.ShellSort; jSyF]$"
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/** TXlxnB
* @author treeroot u4kg#+H
* @since 2006-2-2 zFtRsa5+
* @version 1.0 7k>sE
*/ ou[_ y
public class SortUtil { Wi?37EHr
public final static int INSERT = 1; b-x,`s
public final static int BUBBLE = 2; +R_w- NI
public final static int SELECTION = 3; ^KsiTVY
public final static int SHELL = 4; fy`e)?46
public final static int QUICK = 5; ,.ln
public final static int IMPROVED_QUICK = 6; Y:0SrB!\
public final static int MERGE = 7; qq+fUfB2:
public final static int IMPROVED_MERGE = 8; 3B<$6
public final static int HEAP = 9; j+c<0,Kj
h6dVT9
public static void sort(int[] data) { 3Hli^9&OX_
sort(data, IMPROVED_QUICK); ^BruRgc+
} ~X/1%
private static String[] name={ Z ?{;|Z5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b%fn1Ag9
}; aiKZ$KLC
mt+IB4`
private static Sort[] impl=new Sort[]{ 0O,l rF0'
new InsertSort(), 4ZK8Y[]Lv
new BubbleSort(), wM;9plYlw0
new SelectionSort(), ,ij"&XA
new ShellSort(), 45hjN6
new QuickSort(), cIO7RD$8
new ImprovedQuickSort(), [7~ !M*o9
new MergeSort(), 9W{=6D86e
new ImprovedMergeSort(), }lk_Oe1
new HeapSort() <Cvlz^K[
}; Q`Q%;%t
tBp146`
public static String toString(int algorithm){ GB(o)I#h
return name[algorithm-1]; Ua^'KRSO
} lglC1W-q
<.0-K_
public static void sort(int[] data, int algorithm) { %s;#epP$
impl[algorithm-1].sort(data); XM$HHk}L;
} pN)9GO5
@eRR#S
public static interface Sort { l!plw,PYC
public void sort(int[] data); &sp7YkaW
} P8Bv3
X;7gh>Q'4
public static void swap(int[] data, int i, int j) { &cSTem 0
int temp = data; 4dXuy>Km
data = data[j]; 2z7+@!w/
data[j] = temp; );wSay>%(
} ^1vh5D
} ?=B$-)/