[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; k0?4vA
} Z!C\n[R/
int i1=l; Q;{yIa$ $
int i2=mid+1; $nQ; ++
for(int cur=l;cur<=r;cur++){ #6_?7 (X
if(i1==mid+1) :Tw3Oo_~S
data[cur]=temp[i2++]; y-}lz#N
else if(i2>r) jK\2y|&&c
data[cur]=temp[i1++]; T1;yw1/m5\
else if(temp[i1] data[cur]=temp[i1++]; XZuJ<]}X,
else Z;XR%n8
data[cur]=temp[i2++]; 5Ga>qIM
} OekcU%C
} gE JmMh
o(>!T=f
} *%'4.He7V
$I-$X?
改进后的归并排序: jDcE_55o
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package org.rut.util.algorithm.support; VZF/2d84&w
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import org.rut.util.algorithm.SortUtil; |A7Yv
9M~EH?>+[
/** WW@/q`h
* @author treeroot p{!aRB%
* @since 2006-2-2 Q5r cPU>A
* @version 1.0 tQ'E"u1
*/ 5wRDH1z@{
public class ImprovedMergeSort implements SortUtil.Sort { s>~!r.GC
y ']>J+b0
private static final int THRESHOLD = 10; J7emoD[
6,uW{l8L
/* 6*kY7
* (non-Javadoc) )& %X AW{
* I5Foh|)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,\[&%ph
*/ O\XN/R3
public void sort(int[] data) { )#T(2A
int[] temp=new int[data.length]; k x6%5%
mergeSort(data,temp,0,data.length-1); it5].A&
} 6"[`"~9'V
!V Zl<|
private void mergeSort(int[] data, int[] temp, int l, int r) { :De}5BMy
int i, j, k; >6=yxCJ
int mid = (l + r) / 2; j3P)cz-0/L
if (l == r) h;^h[q1'
return; 2z:4\Y5
if ((mid - l) >= THRESHOLD) Ngu+V
mergeSort(data, temp, l, mid); QT9(s\u
else k:Uyez
insertSort(data, l, mid - l + 1); C:_!zY'z
if ((r - mid) > THRESHOLD) * ?rw'
mergeSort(data, temp, mid + 1, r); %$Wt"~WE"O
else st|$Fu
insertSort(data, mid + 1, r - mid); ZdlZ,vK^.
$9+}$lpPd
for (i = l; i <= mid; i++) { ^lB1- ;ng
temp = data; 2 Nr j@q
} Mm:6+
for (j = 1; j <= r - mid; j++) { e~W35Y>A
temp[r - j + 1] = data[j + mid]; d&wg\"E
} :'f#0ox
int a = temp[l]; +yVz) X
int b = temp[r]; ^uMy|d
for (i = l, j = r, k = l; k <= r; k++) { Q68&CO(rE
if (a < b) { bb$1RLyRL
data[k] = temp[i++]; Ol~sCr
a = temp; "7JO~T+v
} else { ^%)'wDK
data[k] = temp[j--]; uwyzxj
b = temp[j]; vy,ER<
} YCj"^RC^
} 37v!:xF!
} ^p|MkB?uM
%njX'7^u
/** AGx]srl
* @param data \d&j`UVY
* @param l G{knO?BK
* @param i F8Rd#^9PD
*/ pez[qs
private void insertSort(int[] data, int start, int len) { TixHEhw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7;5?2)+=6
} w_ kHy_)
} X<x"\Yk
} fYuJf,I[f
} =xSFKu*
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堆排序： 8ysU.5S
6ALf`:
package org.rut.util.algorithm.support; hWJ\dwF
%+L:Gm+^g#
import org.rut.util.algorithm.SortUtil; U8c0N<j
1U;je,)
/** QjWv?tm
* @author treeroot <?yAIhgN*
* @since 2006-2-2 ecA:y!N
* @version 1.0 L Bb&av
*/ I?G m
public class HeapSort implements SortUtil.Sort{ V9`VFO
:2^%^3+V
/* (non-Javadoc) (*;b\h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @N7X(@O
*/ _"&b%!
public void sort(int[] data) { Pz,kSxe=
MaxHeap h=new MaxHeap(); x>A(016:C
h.init(data); B[Fx2r`0
for(int i=0;i h.remove(); %C" wUAY
System.arraycopy(h.queue,1,data,0,data.length); "A~\$
} M n`gd#
|#D3~au
private static class MaxHeap{ "o*(i7T=n
^Y8?iC<+
void init(int[] data){ (@B gsY
this.queue=new int[data.length+1]; ZN~:^,PO/
for(int i=0;i queue[++size]=data; ( MWh|kp
fixUp(size); SQDllG84E
} f>k]{W Y
} y))d[1E
|a%&7-;
private int size=0; Obgn?TAVX
EdlU}LU
private int[] queue; dT4?8:
'h53:?~
public int get() { \L>3E#R-Q
return queue[1]; $bIVD
} \XFF(
wHq*)7#h#
public void remove() { {'C PLJ{R
SortUtil.swap(queue,1,size--); #!wu}nDu
fixDown(1); J.W0F#?
} :V*c9,>ZO
file://fixdown @W[`^jfQ
private void fixDown(int k) { ghq[oK
int j; &\#If:
while ((j = k << 1) <= size) { /FJ )gQYA
if (j < size %26amp;%26amp; queue[j] j++; ]&w8"q
if (queue[k]>queue[j]) file://不用交换 ZjF5*A8l
break; =Y Je\745
SortUtil.swap(queue,j,k); f40xS7-Q0
k = j; A:Pp;9wl
} c}v>Mx
} bHZXMUewC
private void fixUp(int k) { 4WU%K`jnXb
while (k > 1) { C +S
int j = k >> 1; )F*;7]f
if (queue[j]>queue[k]) K,(37Id'
break; OZ##x
SortUtil.swap(queue,j,k); vncLB&@7
k = j; }TE4)vXs
} ZmU7tK
} WX<),u2@
MG6taOO!
} }8tD|t[
Iow45R~]
} h[HFZv~{
xNDX(_U>\
SortUtil： 1@" L
N~Zcrt_D
package org.rut.util.algorithm; vt8z=O
kD1[6cJ!=.
import org.rut.util.algorithm.support.BubbleSort; >wx1M1
import org.rut.util.algorithm.support.HeapSort; %*J'!PC9n
import org.rut.util.algorithm.support.ImprovedMergeSort; {Aq2}sRl{
import org.rut.util.algorithm.support.ImprovedQuickSort; 'KL!)}B$h
import org.rut.util.algorithm.support.InsertSort; mtfEK3?2*
import org.rut.util.algorithm.support.MergeSort; f-]5ZhM'
import org.rut.util.algorithm.support.QuickSort; w K)/m`{g
import org.rut.util.algorithm.support.SelectionSort; sUl/9VKl
import org.rut.util.algorithm.support.ShellSort; SA3!a.*c
L{)*evBL
/** 1=NP=ZB
* @author treeroot U42B(ow
* @since 2006-2-2 ZDffR:An
* @version 1.0 Mzfuthq=@
*/ Q--Hf$D]H
public class SortUtil { gxa@da
public final static int INSERT = 1; fT$Fv
public final static int BUBBLE = 2; gFBMARxi
public final static int SELECTION = 3; o]gS=iLp
public final static int SHELL = 4; #0*OkZMt
public final static int QUICK = 5; 'UW]~
public final static int IMPROVED_QUICK = 6; LS(J%\hMDm
public final static int MERGE = 7; 0xZX%2E
public final static int IMPROVED_MERGE = 8; BZUA/;Hz &
public final static int HEAP = 9; H<YhO&D*u
XHX$Ur9
public static void sort(int[] data) { fwWE`BB
sort(data, IMPROVED_QUICK); fG{ 9doUD
} Aw~N"i
private static String[] name={ Rq,ST:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7"|j.Yq$H{
}; m`3Mev
ICbT{Mla
private static Sort[] impl=new Sort[]{ )'pc1I
new InsertSort(), XwerQwO=
new BubbleSort(), 97XGJ1HI
new SelectionSort(), QAI!/bB
new ShellSort(), YY? }/r
new QuickSort(), BkO)hze
new ImprovedQuickSort(), k~P{Rm;F
new MergeSort(), Hf^Tok^6@]
new ImprovedMergeSort(), (";{@a %
new HeapSort() |N^z=g P[
}; _mi(:s(
kJy bA
public static String toString(int algorithm){ (l~3~n
return name[algorithm-1]; @X\2K?c(v
} MZ/PXY
XyM?Dc5,
public static void sort(int[] data, int algorithm) { *,Mg
impl[algorithm-1].sort(data); vW\|% @hW,
} xUG:x4Gz+
a%h'utF{[
public static interface Sort { 0xNlO9b/
public void sort(int[] data); 4 Ii@_r>
} p| #gn<z}
.F*2]xj@"
public static void swap(int[] data, int i, int j) { YflotlT}
int temp = data; $S|2'jc
data = data[j]; _:tclBc8R
data[j] = temp; zF F=v7[j
} o`@B*, @
} $_.m<