[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; T5; zgr
} )~{T
int i1=l; 4+ BWHV
int i2=mid+1; R36BvW0X
for(int cur=l;cur<=r;cur++){ "+oP((9
if(i1==mid+1) L*xu<(>K
data[cur]=temp[i2++]; b'9\j.By
else if(i2>r) <9JI@\>
data[cur]=temp[i1++]; iGxlB
else if(temp[i1] data[cur]=temp[i1++]; "@1e0`n Q
else P|> fO'
data[cur]=temp[i2++]; Yv?nw-HM
} sb Wn1 T U
} 9`P<|(
t$NK{Mw5_
} Z)?i&y?
e>zCzKK
改进后的归并排序: h0}=C_.^
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package org.rut.util.algorithm.support; Y}<w)b1e|
uhi(Gny.
import org.rut.util.algorithm.SortUtil; M#BM`2!s
c418TjO;
/** J1@X6U!{
* @author treeroot UF3g]>*
* @since 2006-2-2 ~=$0=)c
* @version 1.0 J9!}8uD
*/ )-D{]>8
public class ImprovedMergeSort implements SortUtil.Sort { C`s
;B4x>
private static final int THRESHOLD = 10; ldd|"[Ds
{}r#s>
/* : GVyY]qBU
* (non-Javadoc) :fo.9J
* ,$i2vGd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q]%eLfC(
*/ Wpgp YcPS
public void sort(int[] data) { HeV6=&#
int[] temp=new int[data.length]; @>>8CU^~
mergeSort(data,temp,0,data.length-1); KIY/nu
} tPv3nh
i2. +E&3v
private void mergeSort(int[] data, int[] temp, int l, int r) { c/:d$o-
int i, j, k; !GB\-(
int mid = (l + r) / 2; > -P UY
if (l == r) asDk@Gcu
return; ;WydXQ}Q^
if ((mid - l) >= THRESHOLD) ^HJvT)e4
mergeSort(data, temp, l, mid); :{:R5d(_I
else %N jRD|
insertSort(data, l, mid - l + 1); (OA-Mgyc
if ((r - mid) > THRESHOLD) F8u;C:^d
mergeSort(data, temp, mid + 1, r); 1k=w 9
else criQa<N"
insertSort(data, mid + 1, r - mid); $1aJdZC7
4RPc&%
for (i = l; i <= mid; i++) { 8>U{>]WG
temp = data; g+g0iS
} D8Ntzsr6
for (j = 1; j <= r - mid; j++) { Ll" Kxg
temp[r - j + 1] = data[j + mid]; >XTDN
} ,\YlDcl':0
int a = temp[l]; GyirE`
int b = temp[r]; MHl ffj
for (i = l, j = r, k = l; k <= r; k++) { U +c?x2\
if (a < b) { UE:';(t
data[k] = temp[i++]; |6]2XW
a = temp; bl8zcpdL
} else { +JyD W%a:L
data[k] = temp[j--]; OoW,mmthj>
b = temp[j]; XH^X4W
} \fX0&l;T9\
} K1S:P( S
} r;>2L'
xIOYwVC
/** %Aqt0e
* @param data :6}Zo
* @param l Q9Tt3h2ga
* @param i mP!=&u fcU
*/ kGz0`8URu
private void insertSort(int[] data, int start, int len) { !hMD>B2Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); eo#2n8I>=1
} wwvS05=[T
} ,.<[iHC}9
} ^bD)Tg5K
} *Z9Rl>
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堆排序： hSl6X3W
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package org.rut.util.algorithm.support; `;`fA|F^
VVd9VGvh
import org.rut.util.algorithm.SortUtil; [6ycs[{!
4Nb&(p
/** "YC5viX
* @author treeroot U4$}8~o4
* @since 2006-2-2 Jw+k=>
* @version 1.0 J!\Cs1!f
*/ sKg IKYG}T
public class HeapSort implements SortUtil.Sort{ \GF9;N}V
5WlBec@
/* (non-Javadoc) 7>-"r*W +z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3rxB]-
*/ Th'B5:`
public void sort(int[] data) { zfsGf'U
MaxHeap h=new MaxHeap(); e) \PW1b
h.init(data); T^Lg+g+I
for(int i=0;i h.remove(); *GZ7S m
System.arraycopy(h.queue,1,data,0,data.length); |8{c|Qz
} ZwFVtR
oCxh[U@*D
private static class MaxHeap{ ,J@A5/B,AA
\kR:GZ`{UV
void init(int[] data){ kd=|Iip;(
this.queue=new int[data.length+1]; h,*-V 'X.k
for(int i=0;i queue[++size]=data; kB! iEoIBA
fixUp(size); y/.I<5+Bu
} M#u~]?hS
} hifC.guK
E"'4=_
private int size=0; (r9W[
"<N2TDF5
private int[] queue; 'kBq@>
dzbFUDJ
public int get() { af>^<q
return queue[1]; O0Pb"ou_h.
} 7l+:gD
+Oafo|%
public void remove() { d71|(`&
SortUtil.swap(queue,1,size--); DtFzT>$^F
fixDown(1); } %bP9
} _SQQS67fu"
file://fixdown g7l?/p[n
private void fixDown(int k) { 6k=*O|r
int j; #dj,=^1_14
while ((j = k << 1) <= size) { d69synEw>k
if (j < size %26amp;%26amp; queue[j] j++; W#bOx0
if (queue[k]>queue[j]) file://不用交换 N51e.;
break; xf7_|l
SortUtil.swap(queue,j,k); nB9(y4
k = j; FoX,({*Ko~
} AxAbU7m
} %E"dha JY
private void fixUp(int k) { -+HD5Hc
while (k > 1) { )JXlPU
int j = k >> 1; c}G\F$
if (queue[j]>queue[k]) =M],5<2;
break; VkD}gJY
SortUtil.swap(queue,j,k); Q`zW[Y&]
k = j; =K;M\_k%y
} (7 O?NS
} 2[X\*"MQ2
G_E \p%L>]
} "nA~/t=
3%(BZ23
} ?ZAynZF|#
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SortUtil： CQns:.`$`
%jh gKq
package org.rut.util.algorithm; G6XDPr:}
Vpe\Okt:
import org.rut.util.algorithm.support.BubbleSort; %0_}usrsk
import org.rut.util.algorithm.support.HeapSort; ?'^dYQ4
import org.rut.util.algorithm.support.ImprovedMergeSort; ^|lw~F
import org.rut.util.algorithm.support.ImprovedQuickSort; O!k C
import org.rut.util.algorithm.support.InsertSort; kKs}E| T
import org.rut.util.algorithm.support.MergeSort; c\.7Z=D
import org.rut.util.algorithm.support.QuickSort; :soR7oHZ
import org.rut.util.algorithm.support.SelectionSort; jmJeu@(
import org.rut.util.algorithm.support.ShellSort; #/ HQ?3h]
*3A)s O
/** 6R|^IPOGp
* @author treeroot 5_[we1$P
* @since 2006-2-2 S7h?tR*u
* @version 1.0 *cy!PF&
*/ 1a tQ9
public class SortUtil { Zq"
public final static int INSERT = 1; &Vy.)0
public final static int BUBBLE = 2; W}P9I&3
public final static int SELECTION = 3; DR(/|?k+
public final static int SHELL = 4; Oq[YbQ'GE
public final static int QUICK = 5; +lhnc{;WJv
public final static int IMPROVED_QUICK = 6; \qkb8H
public final static int MERGE = 7; #By~gcN
public final static int IMPROVED_MERGE = 8; :zQNnq:|
public final static int HEAP = 9; dfMi]rs!<
Lk]W?
public static void sort(int[] data) { 6FFM-9*|[
sort(data, IMPROVED_QUICK); %fIYWu`X
} )?<V-,D
private static String[] name={ FyWrb+_0v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vEc<|t
}; &l~9FE*
EQVa8xt/C
private static Sort[] impl=new Sort[]{ E[Bj+mX9
new InsertSort(), $Ned1@%[
new BubbleSort(), c@x6<S%*
new SelectionSort(), }q=tg9
new ShellSort(), M&}_3
new QuickSort(), f/670Acv
new ImprovedQuickSort(), UgTgva>?
new MergeSort(), 9dwLkr
new ImprovedMergeSort(), .s%dP.P:i1
new HeapSort() [e7nW9\l
}; 8<=]4-X@
IqCh4y3
public static String toString(int algorithm){ ]2rCn};
return name[algorithm-1]; 6T6UIq
} w,-4A o2x
Sr>5V
public static void sort(int[] data, int algorithm) { U"535<mR
impl[algorithm-1].sort(data); ]92=PA>75
} >rY^Un{Z
3 p!t_y|SX
public static interface Sort { |w.h97fj
public void sort(int[] data); l}~9xa}:D|
} 42=/$V
SedVp cb+
public static void swap(int[] data, int i, int j) { L}VQc9"gc
int temp = data; ^+O97<#6C
data = data[j]; B=HEi\55K
data[j] = temp; A2''v3-h8
} 59H~qE1Md
} &F.L*M