[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; &=NJ
} I*(1.%:m
int i1=l; Khap9a_q-
int i2=mid+1; 3Y(9\}E@`
for(int cur=l;cur<=r;cur++){ 5{>>,pP&
if(i1==mid+1) T]uKH29.%
data[cur]=temp[i2++]; wHWma)}-z
else if(i2>r) ThiN9! Y
data[cur]=temp[i1++]; k}s+ca!B
else if(temp[i1] data[cur]=temp[i1++]; ^9=4iXd
else -%i#j>
data[cur]=temp[i2++]; Q0WY$w1<
} |(&oI(l5K
} 7*MU2gb
F1J#Y$q~L
} 4i`S+`#
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改进后的归并排序: ])=H
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package org.rut.util.algorithm.support; y{92Lym
&rP~`4Mkp
import org.rut.util.algorithm.SortUtil; qw2)v*Fn
\imp7}N
/** 2m_H*1HJ
* @author treeroot PLdf_/]-
* @since 2006-2-2 {6:& %V
* @version 1.0 E[ 0Sst x
*/ 8m|x#*5fQl
public class ImprovedMergeSort implements SortUtil.Sort { <"A#Eok|4
gW}}5Xq
private static final int THRESHOLD = 10; Vf$1Sjw
,# eO&
/* ,6RQvw
* (non-Javadoc) H4 =IY
* l@#b;M/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $YPQC
*/ }H; ]k-)
public void sort(int[] data) { j C9<hLt
int[] temp=new int[data.length]; %_)b>C18y
mergeSort(data,temp,0,data.length-1); 4rm87/u*0
} 9>IsqYc
qhnapZJ
private void mergeSort(int[] data, int[] temp, int l, int r) { 'z~KTDX
int i, j, k; pj+tjF6Np
int mid = (l + r) / 2; K)Ge
if (l == r) E}t-N
return; =uS8>.Qj
if ((mid - l) >= THRESHOLD) sZT VM9<)
mergeSort(data, temp, l, mid); F=VoFmF@
else f!(cD80
insertSort(data, l, mid - l + 1); sY_fq.Z
if ((r - mid) > THRESHOLD) ^&HI+M
mergeSort(data, temp, mid + 1, r); ?nY/, q&
else ]Px:d+wX:
insertSort(data, mid + 1, r - mid); Re{ej
eZ[#+0J
for (i = l; i <= mid; i++) { )2/b$i,JKk
temp = data; ,I=O"z>9
} {<"[D([
for (j = 1; j <= r - mid; j++) { } cRi A
temp[r - j + 1] = data[j + mid]; JLt{f=`%F
} m[{nm95QZ
int a = temp[l]; W%w82@'
int b = temp[r]; N:5b1TdI,
for (i = l, j = r, k = l; k <= r; k++) { H_v/}DEG
if (a < b) { cz$c)It
data[k] = temp[i++]; @i;LZa
a = temp; dr}O+7_7%-
} else { H#_}^cGPR=
data[k] = temp[j--]; /\Jc:v#Q
b = temp[j]; P~;<o!f
} +HYN$>
} bXk:~LE
} P"U>tsHK:
J*/$ywI
/** !Mm+bWn=mB
* @param data i_'|:Uy*F
* @param l Z8N@e<!*~8
* @param i @fUX)zm>
*/ `W6:=H
private void insertSort(int[] data, int start, int len) { 7m vSo350
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )WzGy~p8K
} K#%O3RRs
} 9N`+ O
} o<9yaQ;
} 1v+JCOy
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堆排序： ufHuI*
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package org.rut.util.algorithm.support; e<&_tx
o;HdW
import org.rut.util.algorithm.SortUtil; U0lqGEZ
^' edE5
/** gwZ+GA
* @author treeroot i'[n`|c<
* @since 2006-2-2 yHV^a0e7EH
* @version 1.0 *rujdQf
*/ !xJLeQFJI]
public class HeapSort implements SortUtil.Sort{ E1mI Xd;.
Iqe=#hUFe!
/* (non-Javadoc) b7F3]W<`&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3}.mp}K5
*/ mH7CgI
public void sort(int[] data) { "RR./e)h
MaxHeap h=new MaxHeap(); MZ >0K
h.init(data); #L).BM
for(int i=0;i h.remove(); 9OO0Ht4j
System.arraycopy(h.queue,1,data,0,data.length); %BT)oH}
} =PeW$q+
h;:Se
private static class MaxHeap{ ^Y*`D_-G
=B,_d0Id
void init(int[] data){ ?[*@T2Ck
this.queue=new int[data.length+1]; V@54k*V
for(int i=0;i queue[++size]=data; ys~p(
fixUp(size); ZipK;!9by
} XQ+-+CD
} ~]i]kU
_z_3%N
private int size=0; H8=vQy
=_H*fhXS
private int[] queue; Rzn0-cG
" N`V*0h
public int get() { F(J!dG5#
return queue[1]; :Z7"c`6L!~
} *6\`A!C
"cz]bCr8
public void remove() { iu:p&h
SortUtil.swap(queue,1,size--); d/-]y:`f`
fixDown(1); !]jNVg
} M%Kx{*aw&
file://fixdown >> 8KL`l
private void fixDown(int k) { ko7-%+0|]
int j; )MX1776kU
while ((j = k << 1) <= size) { {H7$uiq3:B
if (j < size %26amp;%26amp; queue[j] j++; jW+VUF-t
if (queue[k]>queue[j]) file://不用交换 zWR*g/i
break; S92!jp/
SortUtil.swap(queue,j,k); OB? 79l
k = j; ~]t2?SqNm
} ;wYwiSVd
} yrvSbqR
private void fixUp(int k) { e[VJ0 A=
while (k > 1) { kosJ]q'U
int j = k >> 1; uzn))/"
if (queue[j]>queue[k]) \5L4*
break; ]qP}\+:
SortUtil.swap(queue,j,k); 5F_:[H =
k = j; bMK'J
} /Z9`uK
} M6>\R$
%+OPas8C
} Dm`U|<o
[ QL<&:s&
} KX`nHu;
Tk@g9\6O9
SortUtil： MAhPO!e5.
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package org.rut.util.algorithm; . L6@Rs
)^'B:ic
import org.rut.util.algorithm.support.BubbleSort; t;~`Lm@hY
import org.rut.util.algorithm.support.HeapSort; $A!h=]
import org.rut.util.algorithm.support.ImprovedMergeSort; $4~}_phi
import org.rut.util.algorithm.support.ImprovedQuickSort; kviSQM2
import org.rut.util.algorithm.support.InsertSort; ?Dp^dR
import org.rut.util.algorithm.support.MergeSort; v}*u[GWl]
import org.rut.util.algorithm.support.QuickSort; (/P&;?j
import org.rut.util.algorithm.support.SelectionSort; TXOW/{B
import org.rut.util.algorithm.support.ShellSort; IF?B`TmZ
B+H9c~3$
/** U&\{/l
* @author treeroot 2]3Jb{8FI>
* @since 2006-2-2 &^D@(m7>{K
* @version 1.0 7;-i_&vws
*/ %_=R&m'n`
public class SortUtil { 8}E(UsTa
public final static int INSERT = 1; &``oZvuB
public final static int BUBBLE = 2; WMl^XZO
public final static int SELECTION = 3; Ewsg&CCN
public final static int SHELL = 4; ^3s&90
public final static int QUICK = 5; \osQwGPV
public final static int IMPROVED_QUICK = 6; h9smviU7u
public final static int MERGE = 7; 4W-+k
public final static int IMPROVED_MERGE = 8; Ck a]F2,
public final static int HEAP = 9; o-Fle, qf
s^@Cq=
public static void sort(int[] data) { X35U!1Y\
sort(data, IMPROVED_QUICK); Sg~A'dG
} _Vf|F
private static String[] name={ 2 3w{h d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D ;I;,Z
}; &+iW:
5VoiDM=\c
private static Sort[] impl=new Sort[]{ t"vO&+x
new InsertSort(), 8mddI
new BubbleSort(), QNwAuH T
new SelectionSort(), ]lYEJ`
new ShellSort(), |^{" 2l"j
new QuickSort(), YEoT_>A$dB
new ImprovedQuickSort(), ]7 mSM
new MergeSort(), wo9f99
new ImprovedMergeSort(), zm"g,\.d
new HeapSort() &bK$!8Z
}; Dx)XC?'xO
5FKd{V'
public static String toString(int algorithm){ -s "$I:v
return name[algorithm-1]; ; O0rt1
} o@;_(knb
B;_3IHMO
public static void sort(int[] data, int algorithm) { IomJo
impl[algorithm-1].sort(data); ^C|9K>M
} >iJuR.:OO
s\R?@
public static interface Sort { `:O.g9
public void sort(int[] data); 6\@, Lb
} N)Kr4GC
X;>} ;LiK
public static void swap(int[] data, int i, int j) { R?SHXJ%'
int temp = data; e1Hx"7ew_
data = data[j]; nQmYeM
data[j] = temp; y@JYkp>I
} ZfikNQU9r
} r!iuwE@