[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; m%'9zL c
} VEd\*
int i1=l; GK2IY
int i2=mid+1; G]=U=9ZI
for(int cur=l;cur<=r;cur++){ !nU
if(i1==mid+1) m{I_E G
data[cur]=temp[i2++]; [}+0NGgR
else if(i2>r) !f V.#9AB#
data[cur]=temp[i1++]; =3}@\f#
else if(temp[i1] data[cur]=temp[i1++]; Wi'BX#xCB
else gjk=`lU
data[cur]=temp[i2++]; >rB7ms/@E
} WB"$NYB
} K&Ht37T
6oL-Atf
} o>\jc
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改进后的归并排序: kS[k*bN0
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package org.rut.util.algorithm.support; [yf2_{*0T
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import org.rut.util.algorithm.SortUtil; nZ$,Bjb
tQF7{F-}
/** EX='\~Dw
* @author treeroot _+T;4U'p
* @since 2006-2-2 7=6p
* @version 1.0 hUxpz:U*
*/ D-8%lGS
public class ImprovedMergeSort implements SortUtil.Sort { e*jn7aya
>Czcs=(L.k
private static final int THRESHOLD = 10; d&n0:xOc
F C2oP,
/* BB1'B-O
* (non-Javadoc) v'TkKwl
* P zzX Ds6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EN+WEMro
*/ t'Nu^_#
public void sort(int[] data) { v}M, M&?
int[] temp=new int[data.length]; $xvEYK
mergeSort(data,temp,0,data.length-1); d9R0P2
} T=ox;r
|U8;25Y
private void mergeSort(int[] data, int[] temp, int l, int r) { >hRYsWbmg
int i, j, k; *$1*\oCtz
int mid = (l + r) / 2; 3Nsb@0
if (l == r) SrN0f0
return; 13}=;4O
if ((mid - l) >= THRESHOLD) 6aX m9J
mergeSort(data, temp, l, mid); svU107?
else @:oMlIw;
insertSort(data, l, mid - l + 1); ]zhFFq`
if ((r - mid) > THRESHOLD) VCX})sp
mergeSort(data, temp, mid + 1, r); UY+~,a
else R0gjx"U
insertSort(data, mid + 1, r - mid); aCMF[ 3j
$*MjNj2
for (i = l; i <= mid; i++) { |2 g }i\
temp = data; kVe^g]F
} 2j=3i@
for (j = 1; j <= r - mid; j++) { h%E25in
temp[r - j + 1] = data[j + mid]; j0kEi+!TVq
} %[B &JhT
int a = temp[l]; _0oZgt)
int b = temp[r]; dGQy=T:
for (i = l, j = r, k = l; k <= r; k++) { 4TGg`$e;
if (a < b) { *[.+|v;A
data[k] = temp[i++]; [j1SX-NX
a = temp; kD >|e<}\
} else { s%H5Qa+Uh
data[k] = temp[j--]; deda=%w0
b = temp[j]; :>Z0Kb}7
} #Ru+|KL
} oQjh?vm
} ~.VWrHC
6:330"9
/** f|m.v +7k
* @param data rQ30)5^V|
* @param l zblh_6
* @param i $O%lYQY]
*/ FOquQr1cF
private void insertSort(int[] data, int start, int len) { nO\|43W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q.K >v'
} `5O<U~'d
} WxWgY}`
} E4T?8TO$o%
} pZlBpGQf
f$*M;|c1c/
堆排序： f*NtnD=rJ
FGy7KVR
package org.rut.util.algorithm.support; K)_0ej~C
O<L/m[]
import org.rut.util.algorithm.SortUtil; TG{=~2
6Ck?O/^
/** t=xO12Z
* @author treeroot No=f&GVg
* @since 2006-2-2 c?V,a`6
* @version 1.0 ^}U{O A
*/ ;yBq'_e3
public class HeapSort implements SortUtil.Sort{ !yojZG MB
8ENAif
/* (non-Javadoc) TcauCL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I"Ju3o?u
*/ $daI++v`
public void sort(int[] data) { !xj>~7
MaxHeap h=new MaxHeap(); q/m}+v]
h.init(data); ,y:q]PR
for(int i=0;i h.remove(); e7]IEBbX2O
System.arraycopy(h.queue,1,data,0,data.length); 5\:#-IYJ
} kYPowM
M}(4>W
private static class MaxHeap{ h*_r=' E
Y49kq}
void init(int[] data){ ""d3ownKhw
this.queue=new int[data.length+1]; 4y>G6TD^
for(int i=0;i queue[++size]=data; djZOx;/
fixUp(size); >Q[]i4*A
} hL67g
} 7:jSP$
T/-PSfbkj
private int size=0; .zBSjh_=H
1?E\2t&K
private int[] queue; 7QQ3IepP
Nf<([8v;t
public int get() { @B7;
return queue[1]; I/XVo2Ee
} gAv?\9=a)W
~uzu*7U
public void remove() { @^k$`W;
SortUtil.swap(queue,1,size--); w2/%e$D!9
fixDown(1); dkG-Yz~
} dH#o11[
file://fixdown _ F@>?\B
private void fixDown(int k) { YHvmo@
int j; ^~=o?VtBg
while ((j = k << 1) <= size) { \DeZY97p%
if (j < size %26amp;%26amp; queue[j] j++; &NHIX(b6
if (queue[k]>queue[j]) file://不用交换 P/M*XUG.
break; B<8Z?:3YS
SortUtil.swap(queue,j,k); 90K&s#+13
k = j; Vi5RkUY]
} wz073-v>ZV
} WdunI~&.
private void fixUp(int k) { Zt[ PkBi
while (k > 1) { }I05&/o.3p
int j = k >> 1; NFmB ^@k
if (queue[j]>queue[k]) ZLE4XB]
break; Xa9G;J$
SortUtil.swap(queue,j,k); .!nFy`
k = j; qI8{JcFx:
} ,h8)5Mj/J
} 0BxO75m}o
.$99/2[90
} A4%0
ZuBVq
} -PEpy3dMY
<Ni]\-*
SortUtil： cN&b$8O=%
Rqvm%sAi
package org.rut.util.algorithm; xU67ztS'E'
ec"L*l"
import org.rut.util.algorithm.support.BubbleSort; ``>WFLWTn
import org.rut.util.algorithm.support.HeapSort; z'fGHiX7.0
import org.rut.util.algorithm.support.ImprovedMergeSort; W9a H]9b
import org.rut.util.algorithm.support.ImprovedQuickSort; }1X,~y]
import org.rut.util.algorithm.support.InsertSort; 9FJU'$FN
import org.rut.util.algorithm.support.MergeSort; $Iqt c)DA
import org.rut.util.algorithm.support.QuickSort; 'T+3tGCy+
import org.rut.util.algorithm.support.SelectionSort; hj0uv6t.c
import org.rut.util.algorithm.support.ShellSort; qI5/ME(}
z@T;N'EM
/** ?\ho9nyK
* @author treeroot sx*(JM}Be
* @since 2006-2-2 LB2 2doW
* @version 1.0 !C#q
*/ d:<{!}BR3
public class SortUtil { h'IBVI!P
public final static int INSERT = 1; (_U&EX%
public final static int BUBBLE = 2; *K-,<hJ#L
public final static int SELECTION = 3; qC`"<R=GX
public final static int SHELL = 4; mP3:Fc_G
public final static int QUICK = 5; )M'#l<9B
public final static int IMPROVED_QUICK = 6; Z#"6&kv
public final static int MERGE = 7; {[)J~kC+
public final static int IMPROVED_MERGE = 8; 64b9.5Bn
public final static int HEAP = 9; .\*\bvyCw
<<4G GO
public static void sort(int[] data) { o?/N4$&5l
sort(data, IMPROVED_QUICK); N \A)P
} b>I -4
private static String[] name={ i"sVk8+o!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n#Z6d`
}; Gh42qar`
O{SU,"!y
private static Sort[] impl=new Sort[]{ BD,~M*%z
new InsertSort(), a/`fJY6rR
new BubbleSort(), ]!h%Jlu
new SelectionSort(), _3hCu/BV
new ShellSort(), {*>$LlL
new QuickSort(), kpK:@
new ImprovedQuickSort(), 3vVhE,1N
new MergeSort(), |wVoJO!O}
new ImprovedMergeSort(), -D{~7&
new HeapSort() y(6&90cr
}; *A c~
v|QFUa`
public static String toString(int algorithm){ .^P^lQT]>
return name[algorithm-1]; fs~n{z,ja%
} Njz,y}\
a,lH6lDk
public static void sort(int[] data, int algorithm) { t(Iy[-
impl[algorithm-1].sort(data); X-~Q
} oBKZ$&_h
EUUj-.dEN
public static interface Sort { q0DoR@
public void sort(int[] data); "wexG]R=5
} <(#cPV@j
o.}^6.h"
public static void swap(int[] data, int i, int j) { 5\EHu8
int temp = data; bKG:_mWe w
data = data[j]; D.R5-
data[j] = temp; -v>BeVF
} fIWQ+E
} YN"102CK