[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; <bWG!ZG
} TvbE2Q;/UL
int i1=l; /J;Kn]5e
int i2=mid+1; ZFL~;_r
for(int cur=l;cur<=r;cur++){ )y$(AJx$
if(i1==mid+1) 46h<,na?,
data[cur]=temp[i2++]; qX{+oy5
else if(i2>r) li.;IWb0+)
data[cur]=temp[i1++]; m{HS0l'
else if(temp[i1] data[cur]=temp[i1++]; UCjld
else n:!_
data[cur]=temp[i2++]; `|q(h Ow2
} ~]2K^bh8&
} 5rik7a)Z]
kxv1Hn"`{E
} YaqJ,"GlT
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改进后的归并排序: \4fQMG
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package org.rut.util.algorithm.support; rey!{3U
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import org.rut.util.algorithm.SortUtil; $!t4r
x.$FNt(9
/** R6->t #n,
* @author treeroot zO6oT1I
* @since 2006-2-2 \9T7A&
* @version 1.0 K$=zi}J W
*/ 6'f;-2
public class ImprovedMergeSort implements SortUtil.Sort { #H~64/
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private static final int THRESHOLD = 10; 0g8NHkM:2a
y:uE3Apm
/* gB33?
* (non-Javadoc) ;$g?T~v7
* X&H"51
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5{,<j\#L
*/ W"{N Bi
public void sort(int[] data) { ~D>p0+-c
int[] temp=new int[data.length]; !4+<<(B=E
mergeSort(data,temp,0,data.length-1); ox.F%)eQ
} $XH^~i;
h<QY5=SF
private void mergeSort(int[] data, int[] temp, int l, int r) { V0mn4sfs
int i, j, k; ]`WJOx4
int mid = (l + r) / 2; 1'8YkhQ2a
if (l == r) Nh+H9
return; 5z)~\;[ -
if ((mid - l) >= THRESHOLD) }Q+|W=2t
mergeSort(data, temp, l, mid); JBZ@'8eqi]
else WcGS9`m/
insertSort(data, l, mid - l + 1); @=u3ZVD
if ((r - mid) > THRESHOLD) ns4,@C$
mergeSort(data, temp, mid + 1, r); jL}v9$
else OY({.uVdX
insertSort(data, mid + 1, r - mid); FS1z`wYP
E]r?{t`]
for (i = l; i <= mid; i++) { owv[M6lbD
temp = data; H\[W/"
} wMN]~|z>
for (j = 1; j <= r - mid; j++) { &K,i f
temp[r - j + 1] = data[j + mid]; >9J:Uo1z
} Tlr v={
int a = temp[l]; Xch~ 1K
int b = temp[r]; .=; ;
for (i = l, j = r, k = l; k <= r; k++) { `Pnoxm'
if (a < b) { ~gt@P
data[k] = temp[i++]; dj%!I:Q>u
a = temp; W2!+z{:m
} else { A3*!"3nU
data[k] = temp[j--]; X@FN|Rdh
b = temp[j]; qqU 64E
} hi[pVk~B)
} 5!9zI+S|=`
} Flb&B1
xgtR6E^k
/** yB6?`3A:
* @param data -UT}/:a
* @param l HxI" 8A
* @param i c:.eGH_f
*/ &%Tj/Qx
private void insertSort(int[] data, int start, int len) { `M6)f?|$.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cB&:z)i4
} oP.7/*p
} ddR>7d}N
} Z3!`J&
} Ek}A]zC
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堆排序： tq?!-x+>
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package org.rut.util.algorithm.support; +"VP-s0
)`D:F>p*
import org.rut.util.algorithm.SortUtil; 2J;g{95z
SgOheN-
/** *8XEYZa
* @author treeroot @KAI4LP
* @since 2006-2-2 Kc(FX%3LU
* @version 1.0 0m ? )ROaJ
*/ :BTq!>s
public class HeapSort implements SortUtil.Sort{ syK^<xa
TS5Q1+hWHV
/* (non-Javadoc) @lph)A Nk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k VQ\1!
*/ rrv%~giU
public void sort(int[] data) { vfo~27T{(
MaxHeap h=new MaxHeap(); rVsJ`+L
h.init(data); xId.GWY1
for(int i=0;i h.remove(); KK &?gTa
System.arraycopy(h.queue,1,data,0,data.length); A5w6]:f2
} p()xz
Du){rVY^d
private static class MaxHeap{ NaCy@
PFK '$
void init(int[] data){ g=o4Q< #^y
this.queue=new int[data.length+1]; WjqO@]P6
for(int i=0;i queue[++size]=data; v*yuE5{
fixUp(size); |zE'd!7E
} h)nG)|c
} " 2Dngw
FxtI"g\0
private int size=0; POR\e|hRT]
VLN_w$iEq
private int[] queue; e?f IXk~b
#R RRu2
public int get() { >lM l
return queue[1]; &jr3B;g!C
} & ZB
E1f\%!2l
public void remove() { 2GStN74Xr
SortUtil.swap(queue,1,size--); "C3/T&F
fixDown(1); 01o4Th m
} >-{Hyx
file://fixdown <rSF*
private void fixDown(int k) { ws^ np
int j; 7J&4akT{9
while ((j = k << 1) <= size) { SK.: Q5:
if (j < size %26amp;%26amp; queue[j] j++; pY$Q
if (queue[k]>queue[j]) file://不用交换 ItTz.sQ
break; BL58] P84
SortUtil.swap(queue,j,k); [PKR2UEe]
k = j; dAe')N:KPI
} H 7 ^/q7
} ~<x:q6
private void fixUp(int k) { y18Y:)DkL
while (k > 1) { 6\S~P/PkE
int j = k >> 1; 9]@!S|1
if (queue[j]>queue[k]) P L+sR3bR
break; s&J]zb`
SortUtil.swap(queue,j,k); R_xRp&5
k = j; /|#fejPh
} t);/'3|
} Vs{|xG7WD
v74&BL]a
} 0Fr?^3h
Oz#{S:24M+
} d*Fj3Wkx
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SortUtil： sFTy(A/
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package org.rut.util.algorithm; RY*U"G0#w
5i{j' {_(8
import org.rut.util.algorithm.support.BubbleSort; EDs\,f}
import org.rut.util.algorithm.support.HeapSort; ,3 u}x,
import org.rut.util.algorithm.support.ImprovedMergeSort; O%HHYV%[m
import org.rut.util.algorithm.support.ImprovedQuickSort; ,wdD8ZT'Ip
import org.rut.util.algorithm.support.InsertSort; 9@)O_@=
import org.rut.util.algorithm.support.MergeSort; h3@v+Z<}
import org.rut.util.algorithm.support.QuickSort; t<?,F
import org.rut.util.algorithm.support.SelectionSort; Y:)e(c"A
import org.rut.util.algorithm.support.ShellSort; B^jc3 VsR
t@+}8^M
/** m<2M4u
* @author treeroot BJo*'US-Q
* @since 2006-2-2 ?5 [=(\/.
* @version 1.0 ^L&iR0
*/ jOD?|tK&
public class SortUtil { ib791
public final static int INSERT = 1; _2 osV[e
public final static int BUBBLE = 2; N=g"(%
public final static int SELECTION = 3; SOvF[,+
public final static int SHELL = 4; `n?DU;,
public final static int QUICK = 5; R .2wqkY
public final static int IMPROVED_QUICK = 6; t.\dpBq
public final static int MERGE = 7; 0Z]!/AsC
public final static int IMPROVED_MERGE = 8; YkQd
public final static int HEAP = 9; eO[b1]WLP
g95`.V}
public static void sort(int[] data) { @2v_pJy^
sort(data, IMPROVED_QUICK); 2gVm9gAHUd
} 2SR:FUV/
private static String[] name={ d4z/5Oa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X+]G-
}; 3%=~)7cF
zT?D<XW>1
private static Sort[] impl=new Sort[]{ DrK{}uM
new InsertSort(), y Fq&8 x<X
new BubbleSort(), =[jXe
new SelectionSort(), hqkz^!rp
new ShellSort(), URbletSBQ
new QuickSort(), ?p8_AL'RS
new ImprovedQuickSort(), >t_6B~x9
new MergeSort(), 5rZ
new ImprovedMergeSort(), !brf(-sr)
new HeapSort() h;NYdX5
}; Q>1[JW{$}
CYYU7
public static String toString(int algorithm){ BsYa3d=}
return name[algorithm-1]; }txX;"/
} As<bL:>dE
Jo23P.#<
public static void sort(int[] data, int algorithm) { 1|-Dj|
impl[algorithm-1].sort(data); A1zjPG&]
} x{WD;$J
"wh ,Ue
public static interface Sort { fPW@{~t
public void sort(int[] data); "OnGE$
} -_eLf#3
$5Ff1{
public static void swap(int[] data, int i, int j) { ))'<_nD
int temp = data; ~zNAbaC+>t
data = data[j]; XAL1|]S
data[j] = temp; iTU5l5Uz
} fkNbS
} e'D&8z_;