[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; ;}LJh8_
} ezp<@'0ZT
int i1=l; >DL/..
int i2=mid+1; jOs H2^
for(int cur=l;cur<=r;cur++){ B4Q79gEh=
if(i1==mid+1) EMLx?JnP
data[cur]=temp[i2++]; i 'qMi~{
else if(i2>r) QwBXlO?
data[cur]=temp[i1++]; Vo%Yf9C
else if(temp[i1] data[cur]=temp[i1++]; AzZJG v]H
else EYG"49 c
data[cur]=temp[i2++]; vF"c
} huz86CO
} @7-=zt+f
Zvxp%dES
} zLP],wB
@rF/]UJ
改进后的归并排序: \/!ZA[D|E\
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package org.rut.util.algorithm.support; U IfH*6X
[[w2p
import org.rut.util.algorithm.SortUtil; 6*Zj]is
yO=p3PV d
/** cf)J )
* @author treeroot > @+#
* @since 2006-2-2 y0<Uu
* @version 1.0 `)$`-Pw*
*/ "A;s56}'&
public class ImprovedMergeSort implements SortUtil.Sort { ym\(PCa5`
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private static final int THRESHOLD = 10; z>G;(F2
SG:bM7*1'
/* Hd*}k6
* (non-Javadoc) 7:TO\0]2n
* Lj8)'[K"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4}i*cB`
*/ Q[uAIyv0
public void sort(int[] data) { =h|wwQE
int[] temp=new int[data.length]; X"j>=DEX
mergeSort(data,temp,0,data.length-1); OEnDsIhq
} 0z7L+2#b^
P? (vW&B
private void mergeSort(int[] data, int[] temp, int l, int r) { 'a#mViPTQ)
int i, j, k; @uM EXP
int mid = (l + r) / 2; Bd5+/G=m
if (l == r) 0I5&a
return; -f9]v9|l
if ((mid - l) >= THRESHOLD) 7)^:8I(
mergeSort(data, temp, l, mid); =1Z;Ma<;
else FW#P*}#
insertSort(data, l, mid - l + 1); rQJ"&CapT
if ((r - mid) > THRESHOLD) W8]V
mergeSort(data, temp, mid + 1, r); wzh]97b
else xx }GOY.J
insertSort(data, mid + 1, r - mid); J-V49X#
pZk6w1d!
for (i = l; i <= mid; i++) { KzphNHd
temp = data; 9JnY$e<&
} __I/F6{ 9V
for (j = 1; j <= r - mid; j++) { MR$>!Nlp
temp[r - j + 1] = data[j + mid]; BAV>o|-K
} c2*`2qK#
int a = temp[l]; 4Po)xo
int b = temp[r]; ;:mu}
for (i = l, j = r, k = l; k <= r; k++) { =P`~t<ajB
if (a < b) { /(?@mnq_
data[k] = temp[i++]; %}&(h/= e
a = temp; he$XLTmr:
} else { [ohBPQO
data[k] = temp[j--]; Puh$%;x
b = temp[j]; *hdC?m._
} .A6lj).:
} F[Q!d6
} BFVAw
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/** "e6|"w@8
* @param data 3s*(uS(
* @param l 0Fw6Dq<8-!
* @param i eV7u*d?
*/ wO.iKX;
private void insertSort(int[] data, int start, int len) { JObMZA$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @Uo6>-WF
} F|+W.9
} rwE%G>Vb
} EJ84rSp
} iv&v8;B
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堆排序： 8VQ 24r
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package org.rut.util.algorithm.support; jS<_ )
6#e::GD
import org.rut.util.algorithm.SortUtil; g(ogXA1
o)Z=m:t,lK
/** |=dC )Azs
* @author treeroot bh p5<N
* @since 2006-2-2 6oD\-H
* @version 1.0 ve6w<3D@
*/ :6{`~=
public class HeapSort implements SortUtil.Sort{ x@>&IBiL
Ts$@s^S]
/* (non-Javadoc) H1EDMhn/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sEc;!L
*/ "xJ0 vlw
public void sort(int[] data) { #Q"O4 b:8
MaxHeap h=new MaxHeap(); EZDy+6b
h.init(data); 3)=c]@N0
for(int i=0;i h.remove(); @>Mxwpl?
System.arraycopy(h.queue,1,data,0,data.length); v(]]_h
} ``U^COD
t.Nb?/
private static class MaxHeap{ &>g'$a<[
dt}_D={Be
void init(int[] data){ M~Ttb29{
this.queue=new int[data.length+1]; @`36ku
for(int i=0;i queue[++size]=data; I@#;nyAj"
fixUp(size); >Z.\J2wM<j
} c]-*P7W
} .Dg*\ h
m!tx(XsXU
private int size=0; cD|Htt"
_ *f
private int[] queue; (~~w7L s
@=jWHS
public int get() { v"& pQ
return queue[1]; )0 W`
} M=qb^~ l
T:]L/wCj
public void remove() { uw(NG.4
SortUtil.swap(queue,1,size--); X1{[}!
fixDown(1); bg,9@ }"F
} 5q9s,r_
file://fixdown 6z0@I*
private void fixDown(int k) { $dS@y+
int j; 7{@l%jx][
while ((j = k << 1) <= size) { yXI >I
if (j < size %26amp;%26amp; queue[j] j++; s~I6SA&i
if (queue[k]>queue[j]) file://不用交换 \s"U{N-
break; @yd4$Mv8%
SortUtil.swap(queue,j,k); x<Vm5j
k = j; *Xo]-cKL0
} tZ`Ts}\e
} =OIw*L8C"I
private void fixUp(int k) { goat<\a
while (k > 1) { ;9o;r)9~
int j = k >> 1; 6DG@?O
if (queue[j]>queue[k]) gz2\H}
break; eW5SFY.
SortUtil.swap(queue,j,k); HK\~Qnq
k = j; o<IAeH {+
} 98=wnWX6$
} 3(TsgP>`
RrUBpqA
} z#BR5jF
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} m]i @ +C
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SortUtil： DCqY|4Qc
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package org.rut.util.algorithm; F}Vr:~
"-@[R
import org.rut.util.algorithm.support.BubbleSort; uqz]J$
import org.rut.util.algorithm.support.HeapSort; wtje(z5IL
import org.rut.util.algorithm.support.ImprovedMergeSort; @(r/dZc
import org.rut.util.algorithm.support.ImprovedQuickSort; pTIf@n6I
import org.rut.util.algorithm.support.InsertSort; (/35pg6\
import org.rut.util.algorithm.support.MergeSort; W9NX=gE4
import org.rut.util.algorithm.support.QuickSort; q6YXM
import org.rut.util.algorithm.support.SelectionSort; cGjPxG;
import org.rut.util.algorithm.support.ShellSort; eX@L3BKp
y;/VB,4V
/** YPHS1E?
* @author treeroot Eke5Nb
* @since 2006-2-2 >EY3/Go>
* @version 1.0 TB0 5?F
*/ ]_N|L|]M
public class SortUtil { <b,~:9*?
public final static int INSERT = 1; I`NjqyTW
public final static int BUBBLE = 2; <&C]sb
public final static int SELECTION = 3; e7wSOs
public final static int SHELL = 4; E>l~-PaZY
public final static int QUICK = 5; .Wjs~0c
public final static int IMPROVED_QUICK = 6; '],J$ge
public final static int MERGE = 7; SdD6 ~LS
public final static int IMPROVED_MERGE = 8; ,v"YqD+GC5
public final static int HEAP = 9; -GxaV #{
A~-b!Grf
public static void sort(int[] data) { eM8}X[
sort(data, IMPROVED_QUICK); oq}'}`lw"
} | Bi!
private static String[] name={ `V##Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (+0v<uR^D
}; p,#o<W
Mo^ od<
private static Sort[] impl=new Sort[]{ ~@}Bi@*
new InsertSort(), a\r\PBi
new BubbleSort(), `nu''B H
new SelectionSort(), 4<BjC[@~Z{
new ShellSort(), }}59V&'t
new QuickSort(), {;2PL^i
new ImprovedQuickSort(), YOcO4
new MergeSort(), q@{Bt{$x
new ImprovedMergeSort(), CB^U6ZS
new HeapSort() LGn:c;
}; $` ""
jnn}V~L
public static String toString(int algorithm){ %KLpig
return name[algorithm-1]; 7j-4TY~
} x7Yu I
,y#Kv|R
public static void sort(int[] data, int algorithm) { ZP(f3X@
impl[algorithm-1].sort(data); {z{bY\
} +{oG|r3L
z:wutqru
public static interface Sort { Qnsi`1mASr
public void sort(int[] data); -Fe?R*-g
} Vh4X%b$TV
p^w;kN
public static void swap(int[] data, int i, int j) { .:F%_dS D
int temp = data; 9P+-#B
data = data[j]; 9w7n1k.
data[j] = temp; 1ukTA@Rj&
} 'DCTc&J['
} T{-CkHf9Q