[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; P9tQS"Rs
} SJ WP8+
int i1=l; N|Cy!E=d
int i2=mid+1; L@k;L
for(int cur=l;cur<=r;cur++){ *|,ykb>
if(i1==mid+1) w;SH>Ax:
data[cur]=temp[i2++]; |q.:hWYFpM
else if(i2>r) 2dd:5L,
data[cur]=temp[i1++]; Jn <^Q7N
else if(temp[i1] data[cur]=temp[i1++]; 7)(`
else e ka@?`
data[cur]=temp[i2++]; :?:j$ =nWN
} Sfoy8<j
} gt t$O
w#G=Z_Tt
} _AFt6\
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改进后的归并排序: ";S*[d.2tA
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package org.rut.util.algorithm.support; b#I*~
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import org.rut.util.algorithm.SortUtil; Dy{`">a
(P>eWw\0
/** o"ah\"#el
* @author treeroot 6nWx>R<
* @since 2006-2-2 #G , *j
* @version 1.0 Pdm6u73
*/ >K|GLP
public class ImprovedMergeSort implements SortUtil.Sort { `2(R}zUHN
D"] [&m
private static final int THRESHOLD = 10; 9M7(_E;)B
ZAM+4#@
/* $Z%aGc*
* (non-Javadoc) M}oFn}-T9a
* gM5p1?E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X,Q=n2X?3
*/ tId !C
public void sort(int[] data) { `TlUJ]d)
int[] temp=new int[data.length]; 0iZ9a/v
mergeSort(data,temp,0,data.length-1); "O*W]e
} ATmqq)\s
~h^}W$pO
private void mergeSort(int[] data, int[] temp, int l, int r) { if!`Qid
int i, j, k; ~j&:)a'^
int mid = (l + r) / 2; k-ex<el)#
if (l == r) 6[2?m*BsN
return; {|J2clL
if ((mid - l) >= THRESHOLD) } Ved
mergeSort(data, temp, l, mid); :%b2;&A[
else LI|HET_
insertSort(data, l, mid - l + 1); ~!d)J
if ((r - mid) > THRESHOLD) ,S0~:c:)
mergeSort(data, temp, mid + 1, r); Mm7n?kb6
else eZod}~J8
insertSort(data, mid + 1, r - mid); ocuVDC
UrcN?
for (i = l; i <= mid; i++) { PUZXmnB
temp = data; 4d._Hd='
} 6[|<
for (j = 1; j <= r - mid; j++) { ,f0g|5yDf
temp[r - j + 1] = data[j + mid]; ;{q) |GRF
} ?! _pP|
int a = temp[l]; Ee\-q
int b = temp[r]; )4_6\VaM
for (i = l, j = r, k = l; k <= r; k++) { .yfqS|(
if (a < b) { <&0*5|rR
data[k] = temp[i++]; Q%VR@[`\
a = temp; P"_}F
} else { m3xj5]#^$
data[k] = temp[j--]; ?M-8Fp3 +
b = temp[j]; ^\kHEM|5v
} (`y|AOs
} y3[)zv
} b G5
*;yMD-=
/** o4 g
* @param data {ZM2WFpE
* @param l zu*G4?]~h
* @param i 7RFkHME
*/ IS 9q 5/]
private void insertSort(int[] data, int start, int len) { p>tdJjnt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;q&D,4r]
} $F()`L{Tj
} @gjdyz
} @bCiaBdi
} 0#/ 6P&6
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堆排序： VrE5^\k<a
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package org.rut.util.algorithm.support; Hh;6B!zb+
v_h*:c
import org.rut.util.algorithm.SortUtil; :;WDPRx
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/** 5YH mp7c-z
* @author treeroot Ml/p{ *p
* @since 2006-2-2 X|1YGZJ
* @version 1.0 !K~$-jlT
*/ yj+b/9My
public class HeapSort implements SortUtil.Sort{ sfPN\^k2
71&+dC
/* (non-Javadoc) :QL p`s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &FF. Ddt{
*/ >@Vr'kg+V
public void sort(int[] data) { [=F |^KL
MaxHeap h=new MaxHeap(); _";pk _
h.init(data); xy3%z
for(int i=0;i h.remove(); b{>dOI*.}
System.arraycopy(h.queue,1,data,0,data.length); 7<o;3gR7Kj
} fO(S+}
4^ 6L])y
private static class MaxHeap{ KmOa^vY1.T
xLK0~|_#!
void init(int[] data){ 'R'a/ZR`B7
this.queue=new int[data.length+1]; 9:w,@Phe
for(int i=0;i queue[++size]=data; TC{Qu;`H+U
fixUp(size); l4reG:uYG
} .%Q Ea_\
} ,4W((OQ^
$[CA#AXE
private int size=0; 5@%-=87S
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private int[] queue; /(pChY>
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public int get() { yZ0ZP
return queue[1]; ~RAH -]
} 2I7`
r+pjv_R
public void remove() { NT/B4'_@
SortUtil.swap(queue,1,size--); iX6jvnJ:/
fixDown(1); Qb{5*>
} 9,eR=M]+:
file://fixdown O9)}:++T
private void fixDown(int k) { FNEmGz/4
int j; %{abRBny
while ((j = k << 1) <= size) { 'k Z1&_{
if (j < size %26amp;%26amp; queue[j] j++; ah9',((!
if (queue[k]>queue[j]) file://不用交换 9G/2^PI
break; !z 5d+ M
SortUtil.swap(queue,j,k); wu&7#![,
k = j; *v/*_6f*
} :]QxT8B
} oa !P]r
private void fixUp(int k) { G@!9)v]9
while (k > 1) { iRHQRdij
int j = k >> 1; U/o}{,$A
if (queue[j]>queue[k]) %pQ o%<d
break; 2<@!m@
SortUtil.swap(queue,j,k); Rj`Y X0?+
k = j; S`w)b'B!M
} !PIdw~YC
} <j3HT"^[D
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} hO@3-SRa,k
yv4PK*
} KZfRiCZ
0*x?
SortUtil： 7b2<, .E
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package org.rut.util.algorithm; Fsj[JE
dwMwd@*j
import org.rut.util.algorithm.support.BubbleSort; x's-UO"^
import org.rut.util.algorithm.support.HeapSort; UdJV;T'rm
import org.rut.util.algorithm.support.ImprovedMergeSort; |h/2'zd^-
import org.rut.util.algorithm.support.ImprovedQuickSort; ,0~TvJS
import org.rut.util.algorithm.support.InsertSort; SH|$Dg
import org.rut.util.algorithm.support.MergeSort; /z:K#
import org.rut.util.algorithm.support.QuickSort; kq0m^`
import org.rut.util.algorithm.support.SelectionSort; +'.Q-
import org.rut.util.algorithm.support.ShellSort; hj,x~^cS
|?A-?-
/** F|Q#KwN
* @author treeroot ^T,cXpx|
* @since 2006-2-2 BG=_i#V
* @version 1.0 c$fM6M }
*/ P,_E 4y
public class SortUtil { 1hij4m$b
public final static int INSERT = 1; a"aV&t
public final static int BUBBLE = 2; l:f sZO4
public final static int SELECTION = 3; ?s33x#
public final static int SHELL = 4; gwNkjI=,
public final static int QUICK = 5; pj]<i.p
public final static int IMPROVED_QUICK = 6; 3/FB>w gt
public final static int MERGE = 7; oD\+ 5[x
public final static int IMPROVED_MERGE = 8; @CF4:NNHw
public final static int HEAP = 9; hhhO+D1(
{H2i+"cF
public static void sort(int[] data) { #mYxO
sort(data, IMPROVED_QUICK); =YIQ _,{u
} Hp!F?J7sx
private static String[] name={ P7-3Vf_L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IhLfuyFWu
}; I r~X#$Upc
n]Y _C^
private static Sort[] impl=new Sort[]{ }DaYO\:yK*
new InsertSort(), kM`#U *j
new BubbleSort(), yk2j&}M
new SelectionSort(), `l"~"x^Rr
new ShellSort(), {eUfwPAa3
new QuickSort(), 6<Z9p@6
new ImprovedQuickSort(), e.V){}{V
new MergeSort(), |e&Kg~~C
new ImprovedMergeSort(), aK'r=NU
new HeapSort() ;zDc0qpw
}; to7)gOX(
|=s3a5sl
public static String toString(int algorithm){ KK</5Aw9p
return name[algorithm-1]; MzD0F#Y
} $ 1U%E
@4$E.q<0
public static void sort(int[] data, int algorithm) { za7wNe(s
impl[algorithm-1].sort(data); _wCSL.
} e$=|-Jz
J?'!8,RX
public static interface Sort { X)m2{@v D
public void sort(int[] data); {'!~j!1'j
} h# 8b#
ty>O}9%
public static void swap(int[] data, int i, int j) { YPl{5=
int temp = data; :cTi$n
data = data[j]; qv\yQ&pj
data[j] = temp; v*3:8Y,
} wn`budH?c8
} O5 SX"A