[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; j Ib
} DH DZ_t:
int i1=l; eg"Gjp-4=
int i2=mid+1; !%<^K.wG
for(int cur=l;cur<=r;cur++){ kU5.iK'
if(i1==mid+1) 4Q=ftY<
data[cur]=temp[i2++]; g_*T?;!.U
else if(i2>r) 8?t"C_>*e
data[cur]=temp[i1++]; E{xVc;t
else if(temp[i1] data[cur]=temp[i1++]; XALI<ZY
else *MNHT`Y^o
data[cur]=temp[i2++]; d<w~jP\
} (fD ;g9
} 'J*<iA*W
>>[/UFC)n
} ln*icaDqf
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改进后的归并排序: O/%< }3Sq
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package org.rut.util.algorithm.support; hli|B+:m"
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import org.rut.util.algorithm.SortUtil; "o!{51!'
/il@`w;G
/** #yseiVm;
* @author treeroot OkAK
* @since 2006-2-2 iVtl72O
* @version 1.0 2s*#u<I
*/ {cK^,?x
public class ImprovedMergeSort implements SortUtil.Sort { }y%`)lz~;
:H6FPV78
private static final int THRESHOLD = 10; +1C3`0(
wyx(FinIH
/* P27%xV-n>
* (non-Javadoc) T[k4lM
* `"yxdlXA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y #f QPR
*/ :_<_[Y]1
public void sort(int[] data) { 6SJ"Tni8
int[] temp=new int[data.length]; pi(-A
mergeSort(data,temp,0,data.length-1); $FH18
} r90+,aLM#?
S&O3HC
private void mergeSort(int[] data, int[] temp, int l, int r) { F+UG'4%
int i, j, k; Op.8a`XLt&
int mid = (l + r) / 2; S-+"@>{HJ
if (l == r) s6*ilq1
return; +j+5ud`
if ((mid - l) >= THRESHOLD) uxn)R#?
mergeSort(data, temp, l, mid); kEeo5XN
else PW(\4Q\
insertSort(data, l, mid - l + 1); 0oA{Jix
if ((r - mid) > THRESHOLD) qM4c]YIaSl
mergeSort(data, temp, mid + 1, r); S|V4[ssB
else [./6At&|
insertSort(data, mid + 1, r - mid); }/dRU${!
ubsSa}$q
for (i = l; i <= mid; i++) { #BVtL :x@
temp = data; $aCd/&
} snM Z0W
for (j = 1; j <= r - mid; j++) { P;ZU-G4@
temp[r - j + 1] = data[j + mid]; QB!~Wh
} m8Vdb"0
int a = temp[l]; a`9L,8Ve
int b = temp[r]; }TRAw#h
for (i = l, j = r, k = l; k <= r; k++) { F~#zxwd
if (a < b) { h+.{2^x
data[k] = temp[i++]; =rA~7+}
a = temp; /gcEw!JS
} else { !2\ r LN
data[k] = temp[j--]; gyHHoZc3
b = temp[j]; :nHKl
} /StTb,
} 5FVndMM#y
} ~\p]~qQ\K
B3m_D"?
/** b2(RpY2Y
* @param data a?} .Fs
* @param l zIC;7 5#
* @param i E9\vA*a
*/ ;DA8B'^>
private void insertSort(int[] data, int start, int len) { e<7.y#L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YG:3Fhx0~
} M$4k;
} rVvR!"//yH
} 5hj
} VpfUm?Nq
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堆排序： 0<"k8 k@J
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package org.rut.util.algorithm.support; 'crlA~&#/
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import org.rut.util.algorithm.SortUtil; 5wB =>
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/** 0C<[9Dl.G8
* @author treeroot M}:=zcZ l
* @since 2006-2-2 +;BAV
* @version 1.0 exh/CK4;
*/ |Z\R*b"
public class HeapSort implements SortUtil.Sort{ X)SDG#&+bF
3P~o"a>
/* (non-Javadoc) j1?j6s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .M,RFC
*/ ~"pKe~h
public void sort(int[] data) { kh~'Cn "O
MaxHeap h=new MaxHeap(); |yyO q
h.init(data); %+ 7p lM
for(int i=0;i h.remove(); @J{m@ji{
System.arraycopy(h.queue,1,data,0,data.length); AWjJ{#W>9
} 'K@|3R
Vt^3iX{!
private static class MaxHeap{ 2 &/v]
{^CT}\=>
void init(int[] data){ UX-&/eScN
this.queue=new int[data.length+1]; nMDxH$O
for(int i=0;i queue[++size]=data; rWys'uc
fixUp(size); <9ig?{'
} CO-_ea U(
} U~{du;\
nKR{ug>I)
private int size=0; ?oZR.D|SZ
NW~z&8L
private int[] queue; c,so`I3rI
u$%t)2+$4
public int get() { U<XSj#&8|
return queue[1]; *vgl*k?)
} Qjx?ri//
s?8<50s
public void remove() { 9[!,c`pw
SortUtil.swap(queue,1,size--); u&G.4QQF
fixDown(1); (%iRaw7hp
} MRU7W4W-~/
file://fixdown s}5cSU!|
private void fixDown(int k) { !$2Z-!
int j; u4z&!MT}
while ((j = k << 1) <= size) { fA'qd.{f^
if (j < size %26amp;%26amp; queue[j] j++; ly% F."v
if (queue[k]>queue[j]) file://不用交换 ob+euCuJ
break; f>'Y(dJ'W
SortUtil.swap(queue,j,k); T5urZq*R
k = j; +% /s*EC'w
} 0CSv10Tg
} :^UFiUzrE
private void fixUp(int k) { 'c\iK=fl
while (k > 1) { zYXV;
int j = k >> 1; f}guv~K
if (queue[j]>queue[k]) =U|N=/y#hJ
break; 1+b{}d
SortUtil.swap(queue,j,k); '|;X0fD
k = j; 'mI'dG
} |AZg*T3:W
} yA{W
R+gz<H.Q
} P"sA
XdH\OJ
} UR:aD_h
m*e{\)rd#
SortUtil： zy*/T>{#
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package org.rut.util.algorithm; B^).BQ
aq7~QX_0G
import org.rut.util.algorithm.support.BubbleSort; "3FihE]k
import org.rut.util.algorithm.support.HeapSort; Em[DHfu1Q
import org.rut.util.algorithm.support.ImprovedMergeSort; fs/*V~@
import org.rut.util.algorithm.support.ImprovedQuickSort; VDTcR
import org.rut.util.algorithm.support.InsertSort; `y#UJYXQE
import org.rut.util.algorithm.support.MergeSort; 1+?^0%AC
import org.rut.util.algorithm.support.QuickSort; x8GJY~:SW
import org.rut.util.algorithm.support.SelectionSort; -OSa>-bzNx
import org.rut.util.algorithm.support.ShellSort; 2Sm}On
SkU9ON
/** 0M\D[mg
* @author treeroot U]a*uF~h
* @since 2006-2-2 ){jla,[
* @version 1.0 8Lw B B
*/ mN8pg4
public class SortUtil { F R|&^j6
public final static int INSERT = 1; ~ T>U
public final static int BUBBLE = 2; phO;c;y}
public final static int SELECTION = 3; E*i#?u
public final static int SHELL = 4; _X?^Cy
public final static int QUICK = 5; ctcS:<r/3@
public final static int IMPROVED_QUICK = 6; &^4++
public final static int MERGE = 7; z3?o|A}/W
public final static int IMPROVED_MERGE = 8; @k&qb!Qah
public final static int HEAP = 9; GfC5z n>
6'xsG?{JY
public static void sort(int[] data) { N&@}/wzZ
sort(data, IMPROVED_QUICK); gv5*!eI
} Q_l'o3
private static String[] name={ !ct4;.2 D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I-OJVZ( V
}; a22XDes=
q+,Q<2J
private static Sort[] impl=new Sort[]{ +}jJ&Z9)
new InsertSort(), XrZ*1V
new BubbleSort(), V)}rEX
new SelectionSort(), v%Wx4v@%SE
new ShellSort(), ,AT[@
new QuickSort(), (p%>j0<
new ImprovedQuickSort(), A_KW(;50
new MergeSort(), >M&3Y XC
new ImprovedMergeSort(), 0Won9P
new HeapSort() V')0 Mr
}; 4j)tfhwd8
aMTu-hA
public static String toString(int algorithm){ qx%}knB
return name[algorithm-1]; Hc`A3SMR
} ,0LU~AGe
T Q,?>6n
public static void sort(int[] data, int algorithm) { 4*$G & TX
impl[algorithm-1].sort(data); e1P"[|9>R
} 7g3>jh
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public static interface Sort { U(x]O/m
public void sort(int[] data); m8.U &0
} 23gPbtq/
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public static void swap(int[] data, int i, int j) { y|wc,n%L>
int temp = data; ?,/U^rf^4
data = data[j]; NIw\}[-Z0E
data[j] = temp; 5xL~`-IA&v
} 0Lb4'25.
} Jec'`,Y