[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; <msxHw
} s$h] G[x
int i1=l; PG5- ;i/
int i2=mid+1; 0pe3L
for(int cur=l;cur<=r;cur++){ +0z 7KO%^^
if(i1==mid+1) d?,M/$h
data[cur]=temp[i2++]; 0\{BWNK
else if(i2>r) OU DcY@x~
data[cur]=temp[i1++]; 2h30\/xkU
else if(temp[i1] data[cur]=temp[i1++]; Pj#'}ru!
else cX!Pz.C
data[cur]=temp[i2++]; or ;f&![w
} ~rbIMF4T`]
} R614#yn-+
>"X\>M`"
} 0Rxe~n1o
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改进后的归并排序: q]&.#&h
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package org.rut.util.algorithm.support; 3*_fzP<R
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import org.rut.util.algorithm.SortUtil; G1T^a>tj4
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/** !v#xb3"/
* @author treeroot {0\,0*^p
* @since 2006-2-2 _,h@:Xij
* @version 1.0 =(AtfW^H
*/ jLg@FDb~
public class ImprovedMergeSort implements SortUtil.Sort { -#`c5y}P
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private static final int THRESHOLD = 10; omZO+=8Q
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/* [^H"FA[
* (non-Javadoc) w&&2H8
* '$|UwT`s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8Q`WB0E<|
*/ [jx0-3s:X
public void sort(int[] data) { }b3/b
int[] temp=new int[data.length]; 1-SVCk -
mergeSort(data,temp,0,data.length-1); \~rlgxd
} "+"{+k5t
`A%^UCd
private void mergeSort(int[] data, int[] temp, int l, int r) { 9e!NOl\_;.
int i, j, k; 5@osnf?
int mid = (l + r) / 2; {WN(&eax
if (l == r) [ANuBNF
return; w6|9|f/
if ((mid - l) >= THRESHOLD) 6x{<e4<n
mergeSort(data, temp, l, mid); s3s4OAY
else hi=XYC,
insertSort(data, l, mid - l + 1); ;_kzcK!l
if ((r - mid) > THRESHOLD) &UHPX?x
mergeSort(data, temp, mid + 1, r); 6"T['6:j
else k ^'f[|}
insertSort(data, mid + 1, r - mid); ?q2j3e[>
oj.A,Fh
for (i = l; i <= mid; i++) { x90*yaw>h
temp = data; :)f7A7:;
} pfuW
for (j = 1; j <= r - mid; j++) { +y+"Fyl
temp[r - j + 1] = data[j + mid]; xk~IN%\
} &tR(n$M@>
int a = temp[l]; jPvDFT^d/
int b = temp[r]; 0:Xxl76v4
for (i = l, j = r, k = l; k <= r; k++) { n7aU<`U
if (a < b) { \b8sG"G
data[k] = temp[i++]; !#ri5{od
a = temp; =Yo1v=wxN
} else { eS/B24;*
data[k] = temp[j--]; tU wRE|_
b = temp[j]; G>qZxy`c
} ".*x!l0y7
} co4h*?q
} [t\B6XxT
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/** %3;Fgky
* @param data {'+QH)w(
* @param l z"4]5&3A
* @param i =`n]/L"Q
*/ mwv(j_
private void insertSort(int[] data, int start, int len) { 4o:hyh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R$kpiqK
} =tTqN+4
} 2],_^XBvB
} z(uZF3
} MjfFf} @
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堆排序： PQW(EeQ
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package org.rut.util.algorithm.support; v ]Sl<%ry
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import org.rut.util.algorithm.SortUtil; 6~:Sgt nU
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/** :m=m}3/:
* @author treeroot OIHz I2{
* @since 2006-2-2 ?{"mP 'dD
* @version 1.0 :yT-9Ze%q
*/ W_O)~u8
public class HeapSort implements SortUtil.Sort{ a\uie$"cr]
/T^ JS
/* (non-Javadoc) F,Xo|jjj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hk_y/97OO
*/ v}G]X Z8
public void sort(int[] data) { #BK9 k>i
MaxHeap h=new MaxHeap(); xynw8;Y,
h.init(data); 0XwHP{XaO
for(int i=0;i h.remove(); :A46~UA!$
System.arraycopy(h.queue,1,data,0,data.length); E{xVc;t
} XALI<ZY
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private static class MaxHeap{ a>4uiFiv
2g*J
void init(int[] data){ I:(m aMc
this.queue=new int[data.length+1]; NW|f7 ItX
for(int i=0;i queue[++size]=data; c9''
fixUp(size); I0AJY )R
} Uv_N x10
} ~cAZB9Fa
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private int size=0; k@>\LR/v
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private int[] queue; >e5 *prx+
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public int get() { - N>MBn
return queue[1]; gMWBu~;!
} AEmNHO@%q
>M%\T}5
public void remove() { ^da44Qqu
SortUtil.swap(queue,1,size--); (%CZ*L[9Z
fixDown(1); A|#`k{+1-
} |XYEn7^r
file://fixdown ?q`0ZuAg\<
private void fixDown(int k) { z_;3H,z`
int j; D8{D[fJ;
while ((j = k << 1) <= size) { js^ ,(CS
if (j < size %26amp;%26amp; queue[j] j++; 3>ex5
if (queue[k]>queue[j]) file://不用交换 foF19_2 ,
break; %1 KbS [
SortUtil.swap(queue,j,k); 148V2H)
k = j; QZAB=rR
} (w(
} -b&{+= ^c
private void fixUp(int k) { 5cr(S~Q;
while (k > 1) { zo{/'BnU
int j = k >> 1; A*h{Lsx;
if (queue[j]>queue[k]) h<<>3A
break; m8Vdb"0
SortUtil.swap(queue,j,k); Z#d&|5Xj
k = j; BC>=B@H0
} Zd^6ulx
} >DM44
j*@l"V>~
} Kyt)2p
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} ] H~4
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SortUtil： p?[Tm*r
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package org.rut.util.algorithm; $w)~O<_U
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import org.rut.util.algorithm.support.BubbleSort; WtQ8X|\`
import org.rut.util.algorithm.support.HeapSort; gXT9 r' k
import org.rut.util.algorithm.support.ImprovedMergeSort; c5q9LQ/
import org.rut.util.algorithm.support.ImprovedQuickSort; [L`ZE*z
import org.rut.util.algorithm.support.InsertSort; M}:=zcZ l
import org.rut.util.algorithm.support.MergeSort; `0H g y=
import org.rut.util.algorithm.support.QuickSort; y4Z&@,_{
import org.rut.util.algorithm.support.SelectionSort; rD?L
import org.rut.util.algorithm.support.ShellSort; I +5)Jau^S
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/** &wd;EGGT!q
* @author treeroot ^m#-9-`
* @since 2006-2-2 WH ?}~u9
* @version 1.0 `.x$7!zLC
*/ 5Dp#u
public class SortUtil { a8u9aEB
public final static int INSERT = 1; dca;'$
public final static int BUBBLE = 2; 7*j (*
public final static int SELECTION = 3; bn 6WjJ~Z+
public final static int SHELL = 4; qbrpP(.
public final static int QUICK = 5; I`[i;U{CK
public final static int IMPROVED_QUICK = 6; UT~a&u
public final static int MERGE = 7; kdz=ltw
public final static int IMPROVED_MERGE = 8; ,h|qi[7
public final static int HEAP = 9; yJuQ8+vgR}
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public static void sort(int[] data) { j Ja$a [
sort(data, IMPROVED_QUICK); &aM7T_h8
} MT(o"ltQ
private static String[] name={ RMO,ZVq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -(#I3h;I
}; \ w3]5gJZ
I%|>2}-_U
private static Sort[] impl=new Sort[]{ /TS=7J#
new InsertSort(), r&-m=Kk$
new BubbleSort(), ,mRyQS'F
new SelectionSort(), Vcd.mE(t%
new ShellSort(), hF2IW{=!
new QuickSort(), A!1;}x
new ImprovedQuickSort(), $R<Me
new MergeSort(), {M,,npl
new ImprovedMergeSort(), 0$r^C6}f
new HeapSort() !lo/xQ<
}; \OlmF<~
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public static String toString(int algorithm){ (EPsTox
return name[algorithm-1]; "~TA SX_?
} KfF!{g f
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public static void sort(int[] data, int algorithm) { P%K4[c W~
impl[algorithm-1].sort(data); 54zlnM$
} Jk,;JQ
V I% 6.6D
public static interface Sort { |bgo;J/
public void sort(int[] data); x@8a''
} P2Vg4
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public static void swap(int[] data, int i, int j) { \"hJCP?,
int temp = data; A!^q J#
data = data[j]; &^4++
data[j] = temp; dz Zb
} `~eUee3b.~
} |Ph3#^rM?