[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; uQlVzN.?
} {iRNnh
int i1=l; _rv_-n]"o
int i2=mid+1; ,&$Y2+
for(int cur=l;cur<=r;cur++){ /(w5S',EL
if(i1==mid+1) %WR
data[cur]=temp[i2++]; %F7k| Na
else if(i2>r) Yp8$0KK
data[cur]=temp[i1++]; IM+PjYJ
else if(temp[i1] data[cur]=temp[i1++]; ur|2FS7
else hI yfF
data[cur]=temp[i2++]; %k~=iDk@
} iDA`pemmi&
} \[BnAgsF
E4Sp^,
} AMr9rBd
RB!g,u
改进后的归并排序: Gu-Sv!4p
*,(`%b[
package org.rut.util.algorithm.support; NNT9\JRv_
C^a~)r.h
import org.rut.util.algorithm.SortUtil; MB)xL-jO
2WoB;=
/** `'/8ifKz
* @author treeroot Z-p_hNb
* @since 2006-2-2 \Z$*8z=
* @version 1.0 n~h%K7 c
*/ @AwH?7(b
public class ImprovedMergeSort implements SortUtil.Sort { |7argk+
j'W)Nyw$[
private static final int THRESHOLD = 10; _>*"6
KLk37IY2\
/* JGtdbD?Fw
* (non-Javadoc) zK&`&("4C
* Je/R'QP^8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y<B| e91C
*/ ^l9S5 {
public void sort(int[] data) { <MYD`,$yu
int[] temp=new int[data.length]; h(9K7
mergeSort(data,temp,0,data.length-1); ?^hC|IR$
} l}m@9 ~oC
{MHr]A}X\
private void mergeSort(int[] data, int[] temp, int l, int r) { )9*WmFc+#
int i, j, k; *]LM2J
int mid = (l + r) / 2; (efH>oY[
if (l == r) 7-^d4P+|g
return; Ne=D$o
if ((mid - l) >= THRESHOLD) w$pv
mergeSort(data, temp, l, mid); xN5}y3
else j/sZ:Q
insertSort(data, l, mid - l + 1); iZ{D_uxq
if ((r - mid) > THRESHOLD) nPKj%g3h
mergeSort(data, temp, mid + 1, r); A 9u9d\
else #pIb:/2a_
insertSort(data, mid + 1, r - mid); O_E[FE:+
{AZW."?
for (i = l; i <= mid; i++) { az w8BK
temp = data; 51~:t[N|
} @~"0|,6VC
for (j = 1; j <= r - mid; j++) { /as1
temp[r - j + 1] = data[j + mid]; P^ a$?
} 4`i_ 4&TS
int a = temp[l]; 3h4>edM
int b = temp[r]; p%}oo#%J
for (i = l, j = r, k = l; k <= r; k++) { ZY83,:<
if (a < b) { *_ "j"{
data[k] = temp[i++]; pvX\kX3}
a = temp; 6,!]x>B
} else { >Zr`9$i
data[k] = temp[j--]; k@[Bx>
b = temp[j]; q|S }5
} mF "ctxE
} ;&iQNXL
} RsE+\)
y'(;!5w
/** K\uR=L7
* @param data FsD}Nk=m~
* @param l P?>p+dM
* @param i =ahD'*R^A
*/ *b> ~L
private void insertSort(int[] data, int start, int len) { X@TQD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )s!x)< d;
} / JlUqC
} I(C_}I>Wb
} LNe-]3wB
} !dZC-U~
d8av`m
堆排序： z7NaW e
f7mI\$CN
package org.rut.util.algorithm.support; ^)X^Pcx
*C$ W^u5h
import org.rut.util.algorithm.SortUtil; Yk:\oM
4\t9(_
/** daaurT
* @author treeroot p 5P<3(
* @since 2006-2-2 Pj^6.f+
* @version 1.0 a6[bF
*/ 'y@0P5[se
public class HeapSort implements SortUtil.Sort{ 6%:N^B=%}
z55P~p
/* (non-Javadoc) ~/QzL.S;p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HJwj,SL
*/ |ONkRxr@!
public void sort(int[] data) { &ceZu=*
MaxHeap h=new MaxHeap(); Qd$d*mwg:
h.init(data); PX+$Us
for(int i=0;i h.remove(); z1s9[5
System.arraycopy(h.queue,1,data,0,data.length); x#U?~6.6
} WG9x_X&XJ
o[_{\
private static class MaxHeap{ ?!b}Ir<1j
UL(#B TK
void init(int[] data){ $6R<)]6
this.queue=new int[data.length+1]; |NL$? %I
for(int i=0;i queue[++size]=data; jytfGE:
fixUp(size); ZfS-W&6Z
} iGM-#{5
} YYN=`ST
uYF_sf
private int size=0; {~VgXkjsC
>!?u8^C
private int[] queue; +tl&Jjdm
}]kzj0m
public int get() { {l![{
return queue[1]; H>k=V<
} !DXKn\aQf
>{V]q*[/;Q
public void remove() { BoXQBcG]w
SortUtil.swap(queue,1,size--); ur"ckuG!9
fixDown(1); d.sxB}_O
} C}%g(YRhb
file://fixdown ^~?VD
private void fixDown(int k) { v:eVK!O
int j; L=?Yc*vg
while ((j = k << 1) <= size) { }m(u oT~
if (j < size %26amp;%26amp; queue[j] j++; &*r YY\I
if (queue[k]>queue[j]) file://不用交换 &?v^xAr?B
break; +!CG'qyN>
SortUtil.swap(queue,j,k); :(N3s9:vz
k = j; x%5n&B
} aOETmsw
} mKfT4t
private void fixUp(int k) { nz~3o
while (k > 1) { =T!iM2
int j = k >> 1; U8;k6WT|
if (queue[j]>queue[k]) C([TolZ
break; vQ$FMKz7
SortUtil.swap(queue,j,k); ,a_\o&V
k = j; z1*8 5?
} *q\Ve)E}
} FlttqQQdf
/V^Gn;
} >XM-xK-=
}PUQvIGZZ&
} m6bAvy]3<t
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SortUtil： ]`b/_LJN$F
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package org.rut.util.algorithm; Y7{IF X
K]1A,Q
import org.rut.util.algorithm.support.BubbleSort; mY+Jju1
import org.rut.util.algorithm.support.HeapSort; km|;T!
import org.rut.util.algorithm.support.ImprovedMergeSort; GFB(c
import org.rut.util.algorithm.support.ImprovedQuickSort; :D""c*
import org.rut.util.algorithm.support.InsertSort; i]JD::P_H
import org.rut.util.algorithm.support.MergeSort; c=0S]_
import org.rut.util.algorithm.support.QuickSort; E.R,'Y;x
import org.rut.util.algorithm.support.SelectionSort; RQ;pAO
import org.rut.util.algorithm.support.ShellSort; KC[ql}JP
D37N*9}
/** f![?og)I%
* @author treeroot sB"Oi|#lk
* @since 2006-2-2 7jQOwzj
* @version 1.0 ]6bh#N;.
*/ ;`p+Vs8C
public class SortUtil { |#^wYZO1U
public final static int INSERT = 1; iimTr_TEt
public final static int BUBBLE = 2; C4Z}WBS(
public final static int SELECTION = 3; 9nN$%(EO5;
public final static int SHELL = 4; _0Qp[l-
public final static int QUICK = 5; 2v\,sHw+-
public final static int IMPROVED_QUICK = 6; Dp3&@M"^yY
public final static int MERGE = 7; <lopk('7
public final static int IMPROVED_MERGE = 8; P-o/ax
public final static int HEAP = 9; B4Ko,=pg
["TUSf]
public static void sort(int[] data) { gdPv,p19L
sort(data, IMPROVED_QUICK); R*|y:T,H
} x1VBO.t=*
private static String[] name={ d}2tqPya
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !<BJg3
}; |`B*\\1
^lud2x$O^C
private static Sort[] impl=new Sort[]{ S:aAR*<6
new InsertSort(), w\ 4;5.$
new BubbleSort(), "%ou'\}
new SelectionSort(), @-qS[bV
new ShellSort(), VRV*\*~$
new QuickSort(), 3M\~#>
new ImprovedQuickSort(), @TBcVHy
new MergeSort(), #bc$[%_
new ImprovedMergeSort(), W5z<+8R
new HeapSort() <#/r.}.x
}; W6%\Zwav?)
ur7sf$
public static String toString(int algorithm){ "*UN\VV+s
return name[algorithm-1]; LS;j]!CU
} RdaAS{>Sk
N1/)Fk-z
public static void sort(int[] data, int algorithm) { ldk (zAB.
impl[algorithm-1].sort(data); <cS"oBh&u0
} cetHpU,
UVa:~c$U4
public static interface Sort { &.^(,pt
public void sort(int[] data); utOATjB.z
} *9Ta0e*
w{TZN{Y
public static void swap(int[] data, int i, int j) { {x_SnZz&
int temp = data; #@%DY*w]v
data = data[j]; F/O5Z?C?
data[j] = temp; &BTgISYi
} i82sMN1jl7
} 9BR/zQ2