[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; -=qmYf
} !E7/:t4
int i1=l; b'{D4/
int i2=mid+1; P7Y[?='v
for(int cur=l;cur<=r;cur++){ \|&5eeE@
if(i1==mid+1) 2C8M1^0:Z
data[cur]=temp[i2++]; $K G?d>wx
else if(i2>r) OQsH,'
data[cur]=temp[i1++]; oL6_Ya
else if(temp[i1] data[cur]=temp[i1++]; 3> fuH'=
else )US)-\^
data[cur]=temp[i2++]; nEn2!)$
} Aio0++r-
} "iydXV=Q
vMI\$E&
} o4Ba l^=[
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改进后的归并排序: TMRXl.1
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package org.rut.util.algorithm.support; \m.{^Xd~
l`u*,"$
import org.rut.util.algorithm.SortUtil; =Tj0dfO|"
-J6}7>4^8}
/** BW*zj=N%
* @author treeroot }gn0bCJy
* @since 2006-2-2 <=`@`rm{
* @version 1.0 F%|(pHk
*/ x-W0 h
public class ImprovedMergeSort implements SortUtil.Sort { C'$U1%: j
CRf^6k_;(
private static final int THRESHOLD = 10; Cv=0&S.
lubS{3<
/* 7)]G"m{
* (non-Javadoc) w5nRgdboy!
* GS^4tmc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l-npz)EM
*/ ]zm6;/S
public void sort(int[] data) { 2-CK:)n/#
int[] temp=new int[data.length]; 2]'ozs$|v
mergeSort(data,temp,0,data.length-1); w])Sz*J
} 9!OpW:bR|
:H87x?e[
private void mergeSort(int[] data, int[] temp, int l, int r) { &vn9l#\(
int i, j, k; RU'J!-w{
int mid = (l + r) / 2; HvngjP{>
if (l == r) I[|I\tW
return; ls5S9R 5
if ((mid - l) >= THRESHOLD) Cm&itG
mergeSort(data, temp, l, mid); Tv KX8m"
else aG ,uF
insertSort(data, l, mid - l + 1); &V;a:
if ((r - mid) > THRESHOLD) .6hH}BM
mergeSort(data, temp, mid + 1, r); B?4\IXek
else 8BN'fWl&E
insertSort(data, mid + 1, r - mid); &d2/F i+
o]j*
for (i = l; i <= mid; i++) { <eI;Jph5
temp = data; iOyYf!yg
} t&oNJq{
for (j = 1; j <= r - mid; j++) { l%IOdco#
temp[r - j + 1] = data[j + mid]; E5dXu5+ye
} D'&LwU,o
int a = temp[l]; :z:Blp>nK/
int b = temp[r]; Mc6y'w
for (i = l, j = r, k = l; k <= r; k++) { 4>W`XH
if (a < b) { K$Ph$P@
data[k] = temp[i++]; ~,:f,FkSQ
a = temp; hG67%T'}A
} else { Uwp +w
data[k] = temp[j--]; cQR1v-Xt
b = temp[j]; +EB##
} bODl q
} uu:)jxi
} Dn[1BWM/7
p%s D>1k
/** JjmL6(*ui
* @param data ymzm x$o=
* @param l S;NXOsSu
* @param i HT&0i,`
*/ zxh"@j$?
private void insertSort(int[] data, int start, int len) { = `^jz}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jmFN*VIL
} !2Orklzd1
} 1mX*0>
} 1 W0;YcT]
} 0D'Wr(U(
TU/J]'))C
堆排序： eZ!k'bS=
Vo%d;>!G\;
package org.rut.util.algorithm.support; H@zk8]_P
@2mP
import org.rut.util.algorithm.SortUtil; 9ZBF1sMg
[a3 0iE
/** (Ka#6
* @author treeroot CytpL`&^]
* @since 2006-2-2 pR"qPSv'
* @version 1.0 -db+Y:xUZ
*/ z)%1i
public class HeapSort implements SortUtil.Sort{ lK4+8VZ
- -G1H
/* (non-Javadoc) k mjm6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _a&|,ajy>
*/ .H"hRYPC?
public void sort(int[] data) { \p$0
MaxHeap h=new MaxHeap(); oo!g?X[[
h.init(data); qo@dFKy
for(int i=0;i h.remove(); MjpJAV/84
System.arraycopy(h.queue,1,data,0,data.length); Ps7%:|K]
} =CoT{LRQ_
'm|m+K83
private static class MaxHeap{ gNwXOd u
.6K>"
void init(int[] data){ o$O,#^
this.queue=new int[data.length+1]; >-P0wowL
for(int i=0;i queue[++size]=data; K +~v<F
fixUp(size); k3 l
} f[IchCwX
} sD8S2
]lUu%<-;
private int size=0; o(P:f)B
RY{tX`
private int[] queue; =FmU]DV
x/=j$oA
public int get() { j;)6uia*A
return queue[1]; qedGBl&
} MbfzGYA2~
$T6Qg(p
public void remove() { qR qy
SortUtil.swap(queue,1,size--); yjd'{B9{
fixDown(1); `dP+5u!
} *K|aK p}
file://fixdown D.(G9H
private void fixDown(int k) { tWnm{mF
int j; ~8*oGG~s
while ((j = k << 1) <= size) { YJ$ewK4E#.
if (j < size %26amp;%26amp; queue[j] j++; >A&@Wp1
if (queue[k]>queue[j]) file://不用交换 F-^HN%
break; +,Az\aT/%
SortUtil.swap(queue,j,k); |xVCl<{F%
k = j; 86#mmm)
} 3J T3;O
} U[b;#Y1X
private void fixUp(int k) { _m],(J=,z
while (k > 1) { )\-";?sYky
int j = k >> 1; (L$~zw5gr
if (queue[j]>queue[k]) "ILWIzf.]
break; @@IA35'tc
SortUtil.swap(queue,j,k); {yR)}r
k = j; Wq(l :W'
} X:lPWz!7{
} Net)l@IB]
W(h8!}
} .gGvyscdH;
gE&W6z0fJ
} hXm}d\
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SortUtil： JtpY][}"~3
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package org.rut.util.algorithm; S |>$0P4W(
7E`(8i
import org.rut.util.algorithm.support.BubbleSort; 5L}>+js2
import org.rut.util.algorithm.support.HeapSort; 5lnSa+_/f
import org.rut.util.algorithm.support.ImprovedMergeSort; nud=uJ"(
import org.rut.util.algorithm.support.ImprovedQuickSort; iIaT1i4t.
import org.rut.util.algorithm.support.InsertSort; 9T2A)a]0
import org.rut.util.algorithm.support.MergeSort; zpqGh
import org.rut.util.algorithm.support.QuickSort; )7GLS\uf<%
import org.rut.util.algorithm.support.SelectionSort; WEtA4zCO
import org.rut.util.algorithm.support.ShellSort; 8e!DDh
hG7S]\N_
/** VONAw3k7!
* @author treeroot *Ca)RgM
* @since 2006-2-2 _AYC|R|
* @version 1.0 "F$o!Vk
*/ k%}89glm
public class SortUtil { 45sxF?GSwL
public final static int INSERT = 1; }m%?&c
public final static int BUBBLE = 2; `QdQ?9x{F
public final static int SELECTION = 3; *xg`Kwl5Kl
public final static int SHELL = 4; +RV-VrV
public final static int QUICK = 5; S tnv>
public final static int IMPROVED_QUICK = 6; _]xt65TL
public final static int MERGE = 7; RR!!hY3 K
public final static int IMPROVED_MERGE = 8; ]<T8ZA_Y;
public final static int HEAP = 9; l(,;wAH
;{f??G
public static void sort(int[] data) { ZuvPDW%
sort(data, IMPROVED_QUICK); V.ji _vX
} rLh9`0|D
private static String[] name={ VS|("**
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X@qk>/
}; 7sc<dM
R pI<]1
private static Sort[] impl=new Sort[]{ ncattp
new InsertSort(), /%YiZ#
new BubbleSort(), E0eQ9BXh
new SelectionSort(), RO{@RhnV
new ShellSort(), iv:/g|MBI&
new QuickSort(), /J.\p/%\
new ImprovedQuickSort(), 6lmiMU&V
new MergeSort(), q^1aPz
new ImprovedMergeSort(), ge):<k_
new HeapSort() =+`j?1
}; #)0Tt>d6
y168K[p
public static String toString(int algorithm){ :X1cA3c!
return name[algorithm-1]; 0<@KDlF
} T5Sg2a1&
xN3 [Kp
public static void sort(int[] data, int algorithm) { $iqi:vY
impl[algorithm-1].sort(data); bugFl>
} L; q)8Pb
;wXY3|@
public static interface Sort { 3XwU6M$5g
public void sort(int[] data); !ml_S)
} yYToiW *
/*AJr
public static void swap(int[] data, int i, int j) { nFe` <Al$N
int temp = data; m0j|58~
data = data[j]; =1*%>K
data[j] = temp; hA*Z'.[
} gf3U#L}P
} V+O0k: o