[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; 9Q 4m9}
} \/8 I6a=
int i1=l; D;@*
int i2=mid+1; eQBR*@x
for(int cur=l;cur<=r;cur++){ I+ZK \?Rs
if(i1==mid+1) XY(3!>/eQ[
data[cur]=temp[i2++]; 5w:
else if(i2>r) -Fcg}\9
data[cur]=temp[i1++]; :*GLLjS;
else if(temp[i1] data[cur]=temp[i1++]; !P*1^8b`f
else E;l|I A/7
data[cur]=temp[i2++]; &<</[h/B/F
} ~T<yp
} EC6&#)g;CO
kj(Ko{
} ,3^gB,ka
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改进后的归并排序: _c}@Fi+E
R-Y|;
package org.rut.util.algorithm.support; *&VH!K#@{
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import org.rut.util.algorithm.SortUtil; chjXsq#Q^
"zSi9]j
/** &Nx'Nq9y
* @author treeroot uus}NZ:*l
* @since 2006-2-2 E}U[VtaC
* @version 1.0 /I2RU2|B
*/ ~.4-\M6[
public class ImprovedMergeSort implements SortUtil.Sort { TV$Pl[m
(<?6X9F:N
private static final int THRESHOLD = 10; ,Y~{RgG
np|3 os
/* 5@3[t`n'
* (non-Javadoc) #BQ7rF7CNE
* +dWx?$n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K\5'pp1
*/ S4RvWTtQV
public void sort(int[] data) { m&)5QX
int[] temp=new int[data.length]; F.P4c:GD
mergeSort(data,temp,0,data.length-1); !;'.mMO&%
} _is<.&f6
M{Ss?G4H
private void mergeSort(int[] data, int[] temp, int l, int r) { N>z<v\`
int i, j, k; >*ey 7g
int mid = (l + r) / 2; #E`-b9Q
if (l == r) O[O`4de9
return; 9W$d'IA
if ((mid - l) >= THRESHOLD) +QNFu){G
mergeSort(data, temp, l, mid); D3#/*Ky
else %JBFG.+
insertSort(data, l, mid - l + 1); %GUu{n<6
if ((r - mid) > THRESHOLD) [t55Kz*cD
mergeSort(data, temp, mid + 1, r); 5ru&In&
else C2GF N1i
insertSort(data, mid + 1, r - mid); :O:Rfmr~
/s.O3x._'
for (i = l; i <= mid; i++) { 4^1B'>I
temp = data; FY%v \`@1*
} i3I'n*
for (j = 1; j <= r - mid; j++) { XGE:ZVpW
temp[r - j + 1] = data[j + mid]; g0ec-
} @NMFurm
int a = temp[l]; p"4i(CWGS
int b = temp[r]; ^p#f B4z
for (i = l, j = r, k = l; k <= r; k++) { fI"q/+
if (a < b) { sY__ak!>
data[k] = temp[i++]; ~2xC.DF_N
a = temp; Pf s_s6
} else { xao'L
data[k] = temp[j--]; k8^!5n
b = temp[j]; a' "4:(L
} .5+*,+-
} 8U!;
} t59"[kQ
iq$edq[
/** [Af&K22M(X
* @param data 1aKYxjYM
* @param l Z&W|O>QTl
* @param i T^h;T{H2
*/ )'8DK$.
private void insertSort(int[] data, int start, int len) { TQm x$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d=%:rLm$
} ")|3ZB7>*
} ;\7TQ9z
} 6'y+Ev$9
} }49X N
~S}>|q$
堆排序： 6zs&DOB
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package org.rut.util.algorithm.support; )@.bkzW
.J' 8d"+
import org.rut.util.algorithm.SortUtil; 4?XX_=+F|
c^P8)gPf
/** w)-@?jN
* @author treeroot (g,lDU[=
* @since 2006-2-2 q+XL,E
* @version 1.0 BQVpp,]
*/ Mw!?2G[|
public class HeapSort implements SortUtil.Sort{ .#R\t 7m%
EqzS={Olj
/* (non-Javadoc) a5WVDh,cR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vTN/ho,H
*/ $|.x!sA
public void sort(int[] data) { j"o`K}C
MaxHeap h=new MaxHeap(); J 2%^%5&0
h.init(data); |M|'S~z
for(int i=0;i h.remove(); !!&H'XEJV
System.arraycopy(h.queue,1,data,0,data.length); {\22C `9t
} 9 O| "Ws>{
\UFno$;mA
private static class MaxHeap{ h.c<A{[I6c
r(pp =
void init(int[] data){ KL]K< A
this.queue=new int[data.length+1]; \&]M \
for(int i=0;i queue[++size]=data; Db\.D/76
fixUp(size); NL&(/72V
} uyP)5,
} /6}4<~~4TA
?RGL0`Lg
private int size=0; GutH}Kz"&
yA*~O$~Y
private int[] queue; 2|F.JG^
dT8m$}h9
public int get() { M= !Fb
return queue[1]; Mt)~:V+:
} 8'J>@ uW
<4}zl'.
public void remove() { q /EK]B
SortUtil.swap(queue,1,size--); k:PO"<-U
fixDown(1); `),7*gn*)
} N;tUrdgQ
file://fixdown h4H~;Wl0
private void fixDown(int k) { d{&+xl^ll
int j; PCnE-$QH
while ((j = k << 1) <= size) { K^tM$l\
if (j < size %26amp;%26amp; queue[j] j++; Py\xN
if (queue[k]>queue[j]) file://不用交换 $K^"a
break; Z@&_ T3M
SortUtil.swap(queue,j,k); pI7\]e
k = j; e8gJ }8Fj
} @& #df
} {U(-cdU{e`
private void fixUp(int k) { r=4'6!
while (k > 1) { t/WauY2JUC
int j = k >> 1; Y2vzK;
if (queue[j]>queue[k]) 4]nU%`Z1w
break; XyJ*>;q
SortUtil.swap(queue,j,k); G_zJuE$V
k = j; kHd_q.
} ,eOOV@3C
} >i~W$;t
`,H\j?
} sLK J<=0i
NuI9"I/
} uSbOGhP
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SortUtil： EiWy`H;
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package org.rut.util.algorithm; UTKS<.q
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import org.rut.util.algorithm.support.BubbleSort; S6,AY(V
import org.rut.util.algorithm.support.HeapSort; 0F=UZf&
import org.rut.util.algorithm.support.ImprovedMergeSort; jV8mn{<
import org.rut.util.algorithm.support.ImprovedQuickSort; Q6Y1Jr">X
import org.rut.util.algorithm.support.InsertSort; ZgF-.(GV
import org.rut.util.algorithm.support.MergeSort; _1hc^j
import org.rut.util.algorithm.support.QuickSort; 9>u2; 'Ls
import org.rut.util.algorithm.support.SelectionSort; tY !fO>Fn~
import org.rut.util.algorithm.support.ShellSort; ~1wAk0G`n
xB3;%Lc
/** Htl6Mr*{
* @author treeroot ^DXERt&3
* @since 2006-2-2 }$#e&&)n
* @version 1.0 7!w@u6Q
*/ J}EQ_FC"$
public class SortUtil { {,.1KtrSN
public final static int INSERT = 1; -"u}lCz>
public final static int BUBBLE = 2; fL ng[&
public final static int SELECTION = 3; N72z5[..
public final static int SHELL = 4; LSlaz
public final static int QUICK = 5; x,IU]YW@
public final static int IMPROVED_QUICK = 6; #rMMOu9r2
public final static int MERGE = 7; 6@g2v^ %
public final static int IMPROVED_MERGE = 8; %d($\R-*O
public final static int HEAP = 9; pez*kU+9
>T;"bcb
public static void sort(int[] data) { ]Gow
sort(data, IMPROVED_QUICK); *$/7;CLq
} yw"FI!M
private static String[] name={ >WE3$Q>bi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y/mxdPw
}; Bka\0+
_X;^'mqf~
private static Sort[] impl=new Sort[]{ LdI)
new InsertSort(), iq,qf)BY.|
new BubbleSort(), LdR}v%EH
new SelectionSort(), *ntq;]
new ShellSort(), 4Cke(G
new QuickSort(), ?VEJk,/k
new ImprovedQuickSort(), iI+kZI-
new MergeSort(), $5yS`IqS
new ImprovedMergeSort(), dG.s8r*?M
new HeapSort() b')CGqbbmT
}; ySP1WK
uljd)kLy4O
public static String toString(int algorithm){ Gv>,Ad ka
return name[algorithm-1]; dr^pzM!N
} dm,7OQ
,$Qa]UN5Q
public static void sort(int[] data, int algorithm) { QXishHk&
impl[algorithm-1].sort(data); v3Tr6[9
} f3lFpS
. l RW
public static interface Sort { ] M"{=z
public void sort(int[] data); ?'CIt5n+\{
} X3(:)zUL
()JM161
public static void swap(int[] data, int i, int j) { DF%\1C>
int temp = data; k6ERGQ9|I
data = data[j]; Z/sB72K1
data[j] = temp; P[n`X
} hEsCOcEG
} YZ:YYcr