[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; i%e7LJ@5AW
} nOx4<Wk&
int i1=l; nJ4pTOc
int i2=mid+1; =K'cM=WM6
for(int cur=l;cur<=r;cur++){ QrO\jAZ{Ag
if(i1==mid+1) {7TlN.(
data[cur]=temp[i2++]; -7J|l
else if(i2>r) ^7zu<lX
data[cur]=temp[i1++]; 1I@8A>2^OX
else if(temp[i1] data[cur]=temp[i1++]; N7E$G{TT
else _@S`5;4x
data[cur]=temp[i2++]; |@NiW\O
} T91moRv
} @36u8pE
z[`@}}Q
} Zo1,1O
,h"-
改进后的归并排序: "&Po,AWa
bR@p<;G|
package org.rut.util.algorithm.support; =X.LA%Sf=u
qC F5~;7
import org.rut.util.algorithm.SortUtil; [Nn`l,
O G<,- 7
/** c'/l,k
* @author treeroot |5Xq0nvCe
* @since 2006-2-2 U9b?i$
* @version 1.0 .bBdQpF-
*/ Y0eE-5F,
public class ImprovedMergeSort implements SortUtil.Sort { {(r6e
L(&&26Y
private static final int THRESHOLD = 10; 45hF`b>%,
ca+5=+X7
/* {o(j^@
* (non-Javadoc) q, O$ %-70
* g}@OUG"D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w]N!S;<N
*/ %|s+jeUDn|
public void sort(int[] data) { tcxcup%
int[] temp=new int[data.length]; %iV^S!e
mergeSort(data,temp,0,data.length-1); boDt`2=
} %^RN#_ro(3
(5]}5W*
private void mergeSort(int[] data, int[] temp, int l, int r) { cnTaJ/o
int i, j, k; I? ,>DHUX
int mid = (l + r) / 2; I`NjqyTW
if (l == r) #g6.Glz3
return; U&O: _>~
if ((mid - l) >= THRESHOLD) N-lkYL-%\j
mergeSort(data, temp, l, mid); j?'GZ d"B
else .Wjs~0c
insertSort(data, l, mid - l + 1); H;RwO@v
if ((r - mid) > THRESHOLD) "AE5 V'
mergeSort(data, temp, mid + 1, r); Omd .9
else ]+X@ 7
insertSort(data, mid + 1, r - mid); s[UHe{^T
/ m=HG^!
for (i = l; i <= mid; i++) { c38D}k^):
temp = data; 4?B\O`sy.
} eJg8,7WC
for (j = 1; j <= r - mid; j++) { 5oAK8I
temp[r - j + 1] = data[j + mid]; | Bi!
} G^ :C+/)
int a = temp[l]; l\i)$=d&g
int b = temp[r]; (+0v<uR^D
for (i = l, j = r, k = l; k <= r; k++) { >y"+ -7V)
if (a < b) { =>-Rnc@
data[k] = temp[i++]; B_.%i+ZZ
a = temp; 'inFKy'H
} else { zCk^B/j sM
data[k] = temp[j--]; EN/,5<S<,[
b = temp[j]; M3.do^ss
} A0Qb5e
} $< JaLS
} }}59V&'t
4r45i:
/** A}l3cP; `#
* @param data dkz=CY3p%X
* @param l q.;u?,|E/
* @param i s7F.sg
*/ 4t=G
private void insertSort(int[] data, int start, int len) { PUUwv_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B6={&7U2
} 'dn]rV0(C
} DMOMh#[
} kDsFR#w&`
} \.-bZ$
gw!vlwC&T
堆排序： w(L4A0K[
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package org.rut.util.algorithm.support; q#%xro>m
j:v@pzTD
import org.rut.util.algorithm.SortUtil; fb~ytl<
HAa;hb
/** yU*8|FQbP
* @author treeroot nlc "c5;jh
* @since 2006-2-2 p>huRp^w
* @version 1.0 $&n=$C&x
*/ F1yqxWHeo
public class HeapSort implements SortUtil.Sort{ Te[n,\Nb
XuFYYx~ ^3
/* (non-Javadoc) )P sY($ &
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bx< <~[Ws}
*/ lNYt`xp
public void sort(int[] data) { @u6B;)'l
MaxHeap h=new MaxHeap(); a!v1M2>
h.init(data); t7aefV&_,
for(int i=0;i h.remove(); r97pOs#5:
System.arraycopy(h.queue,1,data,0,data.length); 2fL;-\!y(
} 'DCTc&J['
%iQD /iT5
private static class MaxHeap{ 8)_XJ"9)G
JxM]9<a=4
void init(int[] data){ MDnua
this.queue=new int[data.length+1]; =c\>(2D
for(int i=0;i queue[++size]=data; (,0(
fixUp(size); GBPo8L"9
} ) b (B
} .(cw>7e3D
R\!2l|_
private int size=0; I=`U7Bis"
Fj2BnM3#
private int[] queue; ;~m8;8)
uxr #QA
public int get() { S4_YT@VD%
return queue[1]; a.k.n<
} f*?]+rz
iP7(tnlW$
public void remove() { rX2.i7i,
SortUtil.swap(queue,1,size--); (@fHl=! Za
fixDown(1); m;GCc8
} )"7iJb<E
file://fixdown ?^al9D[:lz
private void fixDown(int k) { *Q "wwpl?
int j; Mh]Gw(?w
while ((j = k << 1) <= size) { -lY6|79bF
if (j < size %26amp;%26amp; queue[j] j++; <Zmg#
if (queue[k]>queue[j]) file://不用交换 1~NT.tY
break; qm/22:&v5
SortUtil.swap(queue,j,k); V_.5b&@
k = j; Q+{xZ'o"Z
} Rl?_^dPx
} f.KN-f8<F
private void fixUp(int k) { YJT&{jYi
while (k > 1) { OrY/`+Cog
int j = k >> 1; iP ->S\
if (queue[j]>queue[k]) r@H /kD
break; "#2a8#
SortUtil.swap(queue,j,k); TNe l/
k = j; =O5pY9UO
} qN9(S:_Px
} Kqb#_hm
y51e%n$
} NJWA3zz
I-]?"Q7Jz
} .ypL=~Rp
$9_xGfx}
SortUtil： Ot_]3:`J~
6]WAUK%h
package org.rut.util.algorithm; |\pj;XU
h+g_rvIG*
import org.rut.util.algorithm.support.BubbleSort; /NI;P]s.
import org.rut.util.algorithm.support.HeapSort; y.mda:$~=
import org.rut.util.algorithm.support.ImprovedMergeSort; |4;Fd9q^m
import org.rut.util.algorithm.support.ImprovedQuickSort; "^})zf~_
import org.rut.util.algorithm.support.InsertSort; FrGgga$
import org.rut.util.algorithm.support.MergeSort; hF~n)oQ
import org.rut.util.algorithm.support.QuickSort; `ts$(u.w
import org.rut.util.algorithm.support.SelectionSort; k8&;lgO'
import org.rut.util.algorithm.support.ShellSort; k<CJ{u0<
7rc0yB
/** X9W@&zQ
* @author treeroot ]8_NZHld
* @since 2006-2-2 Qb-M6ihcc
* @version 1.0 ;"5&b!=t
*/ l*(8i ^
public class SortUtil { M2,l7
public final static int INSERT = 1; -A^_{4X
public final static int BUBBLE = 2; %S960
public final static int SELECTION = 3; t&C1Oo}=3
public final static int SHELL = 4; _7Ju
public final static int QUICK = 5; ] vHF~|/-
public final static int IMPROVED_QUICK = 6; > PRFWO
public final static int MERGE = 7; JE"x
public final static int IMPROVED_MERGE = 8; q$d>(vbq
public final static int HEAP = 9; 24 'J
z% ?+AM)P
public static void sort(int[] data) { @e.C"@G
sort(data, IMPROVED_QUICK); _$E6P^AQ
} U2#"p
private static String[] name={ ?Jm^<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]vUwG--*
}; cKca;SNql1
r,73C/*&/
private static Sort[] impl=new Sort[]{ RLjc&WhzXu
new InsertSort(), *SJ_z(CZm
new BubbleSort(), {#vgtgBB
new SelectionSort(), y&$A+peJ1
new ShellSort(), gV's=cQ
new QuickSort(), KxJ!,F{>H
new ImprovedQuickSort(), %v M-mbX
new MergeSort(), Ju@c~Xm
new ImprovedMergeSort(), EHJ.T~X
new HeapSort() t\dN DS
}; :D5Rlfj
L\J;J%fz.
public static String toString(int algorithm){ b|:YIXml
return name[algorithm-1]; ~g]Vw4pv
} ;WQve_\
Ua: sye
public static void sort(int[] data, int algorithm) { gD@){Ip
impl[algorithm-1].sort(data); JYI,N
} {UI+$/v#
N)X3XTY
public static interface Sort { xef% d G.
public void sort(int[] data); g wRZ%.Cn
} `r6,+&
UcHJR"M~c
public static void swap(int[] data, int i, int j) { Rsm^Z!sn
int temp = data; yS'I[l
data = data[j]; -$ls(oot
data[j] = temp; 4SxX3Fw
} q"lSZ; 'E
} >y7?-*0