[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; 1++Fs
} z%/<|` 7
int i1=l; <Ow+LJWQK
int i2=mid+1; h&IF?h
for(int cur=l;cur<=r;cur++){ 9!vimu)
if(i1==mid+1) k%({< ul
data[cur]=temp[i2++]; G4,BcCPQ
else if(i2>r) -k@Uo(MB
data[cur]=temp[i1++]; ch0x*[N@
else if(temp[i1] data[cur]=temp[i1++]; H~ =;yy
else 4' <y
data[cur]=temp[i2++]; C3 (PI,,
} RS Vt
} sQa9M
)Z@hk]@?_[
} fH;lh-
Oat #%
改进后的归并排序: D?9EO=
jD_B&MQz
package org.rut.util.algorithm.support; M cbiO)@I
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import org.rut.util.algorithm.SortUtil; VN<baK%]
hKFB=U
/** m\J"P'=
* @author treeroot q&EwD(k
* @since 2006-2-2 N+ei)-
* @version 1.0 HlX2:\\
*/ ]"\XTL0
public class ImprovedMergeSort implements SortUtil.Sort { 7o`pNcabtz
H?dEgubg7]
private static final int THRESHOLD = 10; o(Ro/U(Wu
O9MBQNwjA
/* z%WOv~8~
* (non-Javadoc) ]hA]o7k
* B*Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C=PV-Ul+
*/ +Ram%"Zwh
public void sort(int[] data) { /Oa.@53tK6
int[] temp=new int[data.length]; '5SO3/{b
mergeSort(data,temp,0,data.length-1); %Z#[{yuFs
} Ya,(J0l
vTYgWR,h
private void mergeSort(int[] data, int[] temp, int l, int r) { }{ "RgT-qG
int i, j, k; \E2S/1p
int mid = (l + r) / 2; h>jp.%oOu
if (l == r) 3x~AaC.j
return; 15`,kJSK
if ((mid - l) >= THRESHOLD) }zV#?;}
mergeSort(data, temp, l, mid); 3})0p
else .[X"+i\
insertSort(data, l, mid - l + 1); 3O'X;s2\d
if ((r - mid) > THRESHOLD) U7Pn $l2!
mergeSort(data, temp, mid + 1, r); 8*yky
else tsqWnz=)
insertSort(data, mid + 1, r - mid); R{Qvpd$y
ogKd}qTov
for (i = l; i <= mid; i++) { ,zrShliU
temp = data; KXga{]G:
} =?- sazF&
for (j = 1; j <= r - mid; j++) { jTq@@y
temp[r - j + 1] = data[j + mid]; Q##L|*Qy
} JB\BP$ap
int a = temp[l]; &5;y&dh
int b = temp[r]; ( 0Z3Ksfj1
for (i = l, j = r, k = l; k <= r; k++) { G@]|/kN1y
if (a < b) { z`+j]NX]
data[k] = temp[i++]; Y@M l}43
a = temp; {:d9q
} else { 4xNzhnp|
data[k] = temp[j--]; O\qY?)
b = temp[j]; <\5Y~!)
} \%:]o-+"I
} t>>\U X
} +S>}<OE
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/** wPU<jAQyp
* @param data <S%kwS
* @param l @IwVR
* @param i QG=&{-I~[3
*/ ; +E@h=?
private void insertSort(int[] data, int start, int len) { U?Icyn3q0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HFd>UdT%
} vxC,8Z
} auT$-Ki8
} i#y3QCNqf^
} Lg4I6 G
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堆排序： *]_GFixi
4FgY!k
package org.rut.util.algorithm.support; `mTc
r=ds'n"
import org.rut.util.algorithm.SortUtil; w~(x*R}
VpMPTEZ*L
/** b/Z0{38
* @author treeroot #ZRplA~C7]
* @since 2006-2-2 ?*8HZ1m#
* @version 1.0 5Pl~du
*/ O6pL )6d
public class HeapSort implements SortUtil.Sort{ nob^ I5?
F DCHB~D
/* (non-Javadoc) c;e2= A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bswd20(w
*/ J]|lCwF
public void sort(int[] data) { \dag~b<
MaxHeap h=new MaxHeap(); <\cH9D`dE
h.init(data); Z"fnjH
for(int i=0;i h.remove(); 2x*C1
System.arraycopy(h.queue,1,data,0,data.length); 2<@27C5
} s GP}>w-JZ
1y5$
private static class MaxHeap{ Soa5TM
/M "E5
void init(int[] data){ '{:Yg3K
this.queue=new int[data.length+1]; MrA&xM
for(int i=0;i queue[++size]=data; !*gTC1bvB
fixUp(size); e r;3TG~
} h}U\2$5
} xBC:%kG~#
IlcFW
private int size=0; 5Y&s+|
txwTJScg
private int[] queue; ZSTpA,+6
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public int get() { +$+'|w
return queue[1]; Y(]&j`%
} ,1YnWy*
#)BdN
public void remove() { L_rKVoKjt
SortUtil.swap(queue,1,size--); a,U =irBA
fixDown(1); %8V/QimHU
} Pl }dA
file://fixdown 7^~pOFdH
private void fixDown(int k) { -vfV;+3
int j; {-]/r
while ((j = k << 1) <= size) { f9FsZD
if (j < size %26amp;%26amp; queue[j] j++; hsQrHs'k
if (queue[k]>queue[j]) file://不用交换 ?eb2T`\0Q
break; [-sE:O`yt
SortUtil.swap(queue,j,k); [N/[7Q/y
k = j; u= K?K
} snBC +`-
} I^{PnrB
private void fixUp(int k) { p5~;8Q7
while (k > 1) { swVq%]')"
int j = k >> 1; 96Tc:#9i
if (queue[j]>queue[k]) Dc[Qu?]LM
break; mdOF0b%-]
SortUtil.swap(queue,j,k); e.0vh?{\
k = j; B*owV%
} y\Z-x
} 8fdK|l w
F~ n}Ep~1
} }q(IKH\&
AX%9k
} :!1B6Mc
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SortUtil： 5CkM0G`
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package org.rut.util.algorithm; id.o)=
L$`!~z1
import org.rut.util.algorithm.support.BubbleSort; A]{8=
import org.rut.util.algorithm.support.HeapSort; @Ey(0BxNu
import org.rut.util.algorithm.support.ImprovedMergeSort; MWCP/~>a2
import org.rut.util.algorithm.support.ImprovedQuickSort; C<6IiF[>%
import org.rut.util.algorithm.support.InsertSort; 3Nh;^
import org.rut.util.algorithm.support.MergeSort; 0rT-8iJp4P
import org.rut.util.algorithm.support.QuickSort; flLC\
import org.rut.util.algorithm.support.SelectionSort; ,7pO-:*g
import org.rut.util.algorithm.support.ShellSort; ~S R:,R
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/** 0X)'8N
* @author treeroot %+G/oF|
* @since 2006-2-2 hSD)|
* @version 1.0 r! 5C3
*/ CD^_>sya
public class SortUtil { _SC>EP8:Z
public final static int INSERT = 1; Ah &D5,3
public final static int BUBBLE = 2; QH4nb h4
public final static int SELECTION = 3; )E^4\3^:
public final static int SHELL = 4; Ckvm3r\i2
public final static int QUICK = 5; mB#`{|1[
public final static int IMPROVED_QUICK = 6; $xS `i-|
public final static int MERGE = 7; Vd|5JA}<"
public final static int IMPROVED_MERGE = 8; X63DBF4A
public final static int HEAP = 9; >U9!KB
LIVVb"V|,
public static void sort(int[] data) { /PIU@$DV
sort(data, IMPROVED_QUICK); A"C%.InZ
} :f^O!^N
private static String[] name={ '&3Sl?E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B\}E v&
}; 9\Mesf1$o
FQ?H%UcW
private static Sort[] impl=new Sort[]{ xN}P0
new InsertSort(), [(`T*c.#.X
new BubbleSort(), d?&?$qf[
new SelectionSort(), q!<`ci,uS
new ShellSort(), R6)p4#|i
new QuickSort(), $RKd@5XP
new ImprovedQuickSort(), &tQ,2RT
new MergeSort(), 'mug,jM
new ImprovedMergeSort(), ,I@4)RSAH|
new HeapSort() "^<:7_Y
}; .Kq>/6
(XRj##G{
public static String toString(int algorithm){ T |'Ur#
return name[algorithm-1]; vUgLWd
} {TdKS
6yTL7@V|B
public static void sort(int[] data, int algorithm) { CQ"IL;y
impl[algorithm-1].sort(data); GwwxSB&y
} R8\y|p#c
_e8@y{/~Fd
public static interface Sort { ?YgK]IxD
public void sort(int[] data); 4\2p8__
} \Ul*Nsw
akBR"y:~:H
public static void swap(int[] data, int i, int j) { eJ%~6c`@!
int temp = data; rem&F'x0V
data = data[j]; *u7C){)gr[
data[j] = temp; p0$K.f| ^
} v<tH 3I+
} \9i.dF