[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; i8`&XGEd
} GA{Q6]B
int i1=l; J!@$lyH
int i2=mid+1; 6c3+q+#J2
for(int cur=l;cur<=r;cur++){ &S.zc@rN
if(i1==mid+1) 'CDRb3w}B
data[cur]=temp[i2++]; Z' 0Gd@/
else if(i2>r) c0Tda
data[cur]=temp[i1++]; T#1>pED
else if(temp[i1] data[cur]=temp[i1++]; ]Qp0|45=
else G;+hc%3y
data[cur]=temp[i2++]; -L/5Nbup
} MK]S205{
} }{^i*T5rl
{.We%{4V
} 1R/=as,R
7/;Xt&
改进后的归并排序: =W9;rQm
&/7AW(?
package org.rut.util.algorithm.support; "jVMk
T x_n$ &
import org.rut.util.algorithm.SortUtil; 13]sZ([B%|
vXnTPjbE
/** K%<Z"2!+
* @author treeroot <!\J([NM8
* @since 2006-2-2 Riq5Au?*)
* @version 1.0 %aX<p{EY
*/ BPnZ"w_
public class ImprovedMergeSort implements SortUtil.Sort { ,=tVa])
`@{qnCNQ
private static final int THRESHOLD = 10; A$RN7#
9-+6Ed^2
/* x C'>W"pY
* (non-Javadoc) DVYY1!j<
* 'M\ou}P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P 7 [p$Z
*/ Llf>C,)
public void sort(int[] data) { g eaeOERc
int[] temp=new int[data.length]; G}<q
mergeSort(data,temp,0,data.length-1); %Gn(b1X
} A+j~oR
XcA4EBRj
private void mergeSort(int[] data, int[] temp, int l, int r) { @:i>q$aF
int i, j, k; l}X3uyS
int mid = (l + r) / 2; t-SGG{
if (l == r) +fzZ\
return; r+HJ_R,5A
if ((mid - l) >= THRESHOLD) &X^~%\F:2
mergeSort(data, temp, l, mid); !+cRtCaA::
else `xkJ.,#Io
insertSort(data, l, mid - l + 1); kTG}>I
if ((r - mid) > THRESHOLD) n<7#?X7
mergeSort(data, temp, mid + 1, r); M`umfw T
else H7)(<6b,z
insertSort(data, mid + 1, r - mid); ^HHJ.QR
=5_8f
for (i = l; i <= mid; i++) { LX j Tqp'
temp = data; ?x]T&S{
} <;x+?j
for (j = 1; j <= r - mid; j++) { dL")E|\\k
temp[r - j + 1] = data[j + mid]; ~s{$&N
} bTKzwNx
int a = temp[l]; '<m[
int b = temp[r]; 9Dd/g7
for (i = l, j = r, k = l; k <= r; k++) { }6eWdm!B
if (a < b) { n$}c+1
data[k] = temp[i++]; P/t$xqAL
a = temp; NF0} eom
} else { 2P9hx5PiV
data[k] = temp[j--]; NS=puo
b = temp[j]; 9F kwtF
} Cs%'Af
} Y&k'4Y%
} \J0gzi.
a+*|P
/** 4MRHz{`wa
* @param data CN: 36
* @param l cX1"<fD o
* @param i 9n!3yZVSe
*/ z;'"c3qG8
private void insertSort(int[] data, int start, int len) { >'Nrvy%&0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4|Jy]
} &e[/F@\%
} $K\\8$Z
} p=9G)VO
} V )1SZt@x
n?aogdK$V
堆排序： \I#2Mq?
LtH;#Q
package org.rut.util.algorithm.support; Yk<?HNf
&e_M \D
import org.rut.util.algorithm.SortUtil; p%J,af
V|xR`Q
/** 0_qqBL.4
* @author treeroot a+zE`uY
* @since 2006-2-2 ykl./uY'
* @version 1.0 1NN99^q
*/ tb&{[|O^
public class HeapSort implements SortUtil.Sort{ Fg5c;sls
^b;.zhp8;N
/* (non-Javadoc) V'^s5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .knRH^
*/ lpve Yz
public void sort(int[] data) { 2#6yO`?uo
MaxHeap h=new MaxHeap(); b)$<aFl
h.init(data); E[2c`XFd8
for(int i=0;i h.remove(); &OGY?[n
System.arraycopy(h.queue,1,data,0,data.length); QS_"fsyN:
} X,x{!
^7TM.lE
private static class MaxHeap{ =wU08}
nd_d tsp#
void init(int[] data){ GRO[&;d`
this.queue=new int[data.length+1]; +n^$4f
for(int i=0;i queue[++size]=data; Y'bDEdeT
fixUp(size); "=9L7.E)
} ?KI_>{
} 6/s#'#jh
R S;r
private int size=0; .\{GU9|nO
hXbb+j
private int[] queue; gjvKrg
vlm&)DIt
public int get() { "-A@>*g
return queue[1]; RjSVa.x
} '(&.[Pk:"
6BLw 4m=h
public void remove() { XLg6?Nu
SortUtil.swap(queue,1,size--); _hAp@? M
fixDown(1); OPBnU@=R
} q%Obrk
file://fixdown DDc?GY:
private void fixDown(int k) { ,t5Ku)eNm
int j; J03yFT,dF
while ((j = k << 1) <= size) { E7oL{gU
if (j < size %26amp;%26amp; queue[j] j++; d1``}naNw
if (queue[k]>queue[j]) file://不用交换 cm6cW(x6
break; y!mjZR,&
SortUtil.swap(queue,j,k); Y%|f<C)lx2
k = j; VoWlBH
} #G$_\bt
} (6>8Dt 9[
private void fixUp(int k) { 5Ee%!Pk
while (k > 1) { \@GA;~x.b
int j = k >> 1; vM1f-I-
if (queue[j]>queue[k]) . sgV
break; 4mQ:i7~
SortUtil.swap(queue,j,k); 29 Yg>R!/
k = j; QP >P
} ~H7m7
} .1[K\t)2
(.m0hN!~u
} m:)v>vu
DZilK:
} "S_t%m&R
ygWo9?
SortUtil： iZwt,)(
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package org.rut.util.algorithm; O9dIobu4
a5:YP
import org.rut.util.algorithm.support.BubbleSort; o[O-|XL_
import org.rut.util.algorithm.support.HeapSort; F%+/j5~^
import org.rut.util.algorithm.support.ImprovedMergeSort; I|n<B"Q6^
import org.rut.util.algorithm.support.ImprovedQuickSort; @i$9c)D
import org.rut.util.algorithm.support.InsertSort; 9`$fU)K[Pl
import org.rut.util.algorithm.support.MergeSort; go@UE2qw
import org.rut.util.algorithm.support.QuickSort; /al(=zf
import org.rut.util.algorithm.support.SelectionSort; @'/\O-
import org.rut.util.algorithm.support.ShellSort; 1<\@i{;xsU
liA)|.H
/** SQ1.jcWW[
* @author treeroot k/u6Cw0/
* @since 2006-2-2 o;D87E6Z
* @version 1.0 zVd2kuI&?
*/ C*,-lk0b@
public class SortUtil { [C,<Q
public final static int INSERT = 1; K;sH0*
public final static int BUBBLE = 2; cuB~A8H#}
public final static int SELECTION = 3; w\:-lXw
public final static int SHELL = 4; $[by)
public final static int QUICK = 5; B=jJ+R
public final static int IMPROVED_QUICK = 6; 0;#%KC,
public final static int MERGE = 7; SirjWYap
public final static int IMPROVED_MERGE = 8; kBS;SDl)
public final static int HEAP = 9; =%%\b_\L
&<_*yl p
public static void sort(int[] data) { A{bt Z#k
sort(data, IMPROVED_QUICK); <_dyUiT$J
} Yo/U/dB
private static String[] name={ \|F4@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hJ (Q^Z
}; 5IOOVYl
`{gkL-
private static Sort[] impl=new Sort[]{ lQ<2Vw#Yl
new InsertSort(), +\fr3@Yc
new BubbleSort(), =!*e; L
new SelectionSort(), j#f+0
new ShellSort(), *!$4
new QuickSort(), rr>QG<i;G
new ImprovedQuickSort(), &na#ES$X,
new MergeSort(), =;W"Pi;*
new ImprovedMergeSort(), .0:BgM
new HeapSort() 3{LXx
}; O#7ONQfBO
Hzcy'
public static String toString(int algorithm){ :2pd2S
return name[algorithm-1]; XI} C|]#
} GbFLu`Iu
y<W?hE[
public static void sort(int[] data, int algorithm) { 2?u>A3^R
impl[algorithm-1].sort(data); AjKP -[
} 9c1g,:8\
=Mzg={)v
public static interface Sort { g{.>nE^Sc5
public void sort(int[] data); l"5$6h
} s:'M[xI
ZR.1SA0x?O
public static void swap(int[] data, int i, int j) { [^EU'lewnW
int temp = data; \_Nr7sc\
data = data[j]; 5+vCuVZ
data[j] = temp; |Zr5I";
} ;5:g%Dt
} x#-uf