[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; [4 g5{eX
} .2Q`. o)
int i1=l; `PSr64h:D
int i2=mid+1; Y((z9-`
for(int cur=l;cur<=r;cur++){ *u>2"!+Ob
if(i1==mid+1) f<xF+wE
data[cur]=temp[i2++]; $%;NX[>j
else if(i2>r) <3P?rcd,5K
data[cur]=temp[i1++]; n]ar\f
else if(temp[i1] data[cur]=temp[i1++]; d`StBXG!
else R"5/
data[cur]=temp[i2++]; P0RMdf
} / Zz2=gDY
} qzE/n
QoDWR5*^D
} ^*A/92!yF
174H@
改进后的归并排序: fB1JU1
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package org.rut.util.algorithm.support; q]<Xx{_
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import org.rut.util.algorithm.SortUtil; j!mI9*hP
LAwX9q`
/** `C=!8q
* @author treeroot s[nOB0
* @since 2006-2-2 =)Ew6} W6
* @version 1.0 Y4@~NCU/
*/ q*DR~Ov
public class ImprovedMergeSort implements SortUtil.Sort { i= ~HXr}
,U>g LTS
private static final int THRESHOLD = 10; <2A4}+p:
RK'3b/T
/* 1uB}Oe2~
* (non-Javadoc) *X%`MN
* K_]LK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~Ufcy{x#
*/ v&H&+:<
public void sort(int[] data) { {zbH.V[
int[] temp=new int[data.length]; l3-KswU
mergeSort(data,temp,0,data.length-1); d#ld*\|
} "^_p>C)T
KT?vs5jg$&
private void mergeSort(int[] data, int[] temp, int l, int r) { 4$IPz7
int i, j, k; `~@BU
int mid = (l + r) / 2; ywq{9)vq
if (l == r) 8"oS1W
return; px4Z
if ((mid - l) >= THRESHOLD) gjo\gP@
mergeSort(data, temp, l, mid); He#+zE;
else JFYeOmR+l
insertSort(data, l, mid - l + 1); \hi{r@k>}
if ((r - mid) > THRESHOLD) yc%AkhX*
mergeSort(data, temp, mid + 1, r); ^o,@9GTs
else 'd(}bYr)
insertSort(data, mid + 1, r - mid); eWwSD#N#
pNQd\nY|0
for (i = l; i <= mid; i++) { OE4 2{?)
temp = data; K\?vTgc(
} Ij=hmTl{P
for (j = 1; j <= r - mid; j++) { }E?s*iP
temp[r - j + 1] = data[j + mid]; ).v;~yE
} &]#D`u
int a = temp[l]; 'J!P:.=a>
int b = temp[r]; .YS[Md{
for (i = l, j = r, k = l; k <= r; k++) { _9L2JN$R6
if (a < b) { HO' ELiZ_q
data[k] = temp[i++]; 7F+f6(hB
a = temp; .Z/"L@
} else { w'L;`k;Q
data[k] = temp[j--]; >St
b = temp[j]; !*CL>}-,
} uidE/7
} Q8\Ks|u]
} o &Nr5S
bZ3CJ f&mE
/** &=02.E@
* @param data s[xdID^3.
* @param l J3q}DDnEo
* @param i Qz<v. _
*/ +d#ZSNu/
private void insertSort(int[] data, int start, int len) { Zqx5I~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >TL0hBaaR
} >aa-ix &
} [k1N`K(M
} Cs*u{O
} F~* 5`o
JY>]u*=
堆排序： rRsLl/d
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package org.rut.util.algorithm.support; DM>j@(uWF
XqJ@NgsY
import org.rut.util.algorithm.SortUtil; C/]0jAAE7
{H0B"i
/** 8.9S91]=
* @author treeroot T}4RlIZF
* @since 2006-2-2 oq0G@
* @version 1.0 ,&l>^w/
*/ 1lMU('r%
public class HeapSort implements SortUtil.Sort{ '9^x"U9c
/B1NcRS
/* (non-Javadoc) *,Y+3yM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jfgAI7;b
*/ ?[VS0IBS
public void sort(int[] data) { \idg[&}l}
MaxHeap h=new MaxHeap(); m\jp$
h.init(data); B-eYWt8s
for(int i=0;i h.remove(); uFECfh
System.arraycopy(h.queue,1,data,0,data.length); d3Y#_!)
} *K0CUir|
~Jq<FVK
private static class MaxHeap{ QF\NHV
se(_`a/4Q
void init(int[] data){ hEEbH@b
this.queue=new int[data.length+1]; v?Y9z!M
for(int i=0;i queue[++size]=data; r%TgZ5~u
fixUp(size); \Dr@n^hk@[
} w"A'uFXLc
} T_I"Tsv
4Jo:^JV
private int size=0; "-^TA_XfI
8tPq5i
private int[] queue; )e{~x u
-bKli<C
public int get() { L6U[H#3(
return queue[1]; 9Y*6AaKE6
} RQ|!?\a=
i' N
public void remove() { \!s0VEE
SortUtil.swap(queue,1,size--); 7eh}Je8
fixDown(1); +h[$\_y
} Xt9?7J#\T
file://fixdown &.Yh_
private void fixDown(int k) { 9I9J}&4
int j; A^o
while ((j = k << 1) <= size) { l<^#@SH
if (j < size %26amp;%26amp; queue[j] j++; c+-L>dsss
if (queue[k]>queue[j]) file://不用交换 H VG'v>s@
break; nvpdu)q<
SortUtil.swap(queue,j,k); zD2Bhta y
k = j; J;'?(xO3\
} k,b(MAiQ0
} t</Kel|D
private void fixUp(int k) { ;>|:I(l;
while (k > 1) { '{U56^b]
int j = k >> 1; Px'%5TKN
if (queue[j]>queue[k]) _Z5l Nu
break; ~])\xC
SortUtil.swap(queue,j,k); >^> \y8on
k = j; RH>b,
} Wc03Sv&FZ
} r~TiJ?8I
y&9v0&o
} w.J2pvyB
c?b?x 6 2
} `%F.]|Y0
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SortUtil： 1 dI
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package org.rut.util.algorithm; :NS;y-{^^y
MdZ7Yep
import org.rut.util.algorithm.support.BubbleSort; mNm 8I8
import org.rut.util.algorithm.support.HeapSort; OsvAm'B
import org.rut.util.algorithm.support.ImprovedMergeSort; Y( D d7`c
import org.rut.util.algorithm.support.ImprovedQuickSort; LK/gG6n5M0
import org.rut.util.algorithm.support.InsertSort; b 3D:w{l
import org.rut.util.algorithm.support.MergeSort; GEIMCg(TRj
import org.rut.util.algorithm.support.QuickSort; kB"Sh_:m
import org.rut.util.algorithm.support.SelectionSort; g8!!:fdu
import org.rut.util.algorithm.support.ShellSort; QBY7ZT05Gt
o<@2zhuhrx
/** 6+m)
* @author treeroot 8uS1HE\%
* @since 2006-2-2 NzNAhlXj3
* @version 1.0 xg\M9&J
*/ S #&HB
public class SortUtil { h'w9=Pk~6y
public final static int INSERT = 1; 8~\Fpz|Og
public final static int BUBBLE = 2; ANn{*h
public final static int SELECTION = 3; 7^as~5'&-
public final static int SHELL = 4; W"VN2
public final static int QUICK = 5; 44RZk|U1J{
public final static int IMPROVED_QUICK = 6; mmr>"`5.
public final static int MERGE = 7; ,LWM}L
public final static int IMPROVED_MERGE = 8; :h*20iP
public final static int HEAP = 9; -5kq9Dy\,
sVaWg?=qs'
public static void sort(int[] data) { <`*6;j.&
sort(data, IMPROVED_QUICK); mkrvWZjZX
} BAg*zYV7
private static String[] name={ <w.V!"!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |PDuvv!.f
}; hFj.d]S
j$&k;S
private static Sort[] impl=new Sort[]{ 9BNAj-Xa
new InsertSort(), [WX+/pm7>
new BubbleSort(), X1#D}
new SelectionSort(), :14O=C
new ShellSort(), p5c'gziR
new QuickSort(), m!N_TOl-^
new ImprovedQuickSort(), H,KU!1p
new MergeSort(), 9"_qa q
new ImprovedMergeSort(), OQW#BBet@
new HeapSort() ~}z p}Pt
}; B58H7NH ;G
/Eh\07p
public static String toString(int algorithm){ )0fQ(3oOg
return name[algorithm-1]; \*!g0C8 o
} "{qhk{
p^ 9QYR
public static void sort(int[] data, int algorithm) { JR'Q Th:z
impl[algorithm-1].sort(data); \TC&/'7}
} qC.jXU?rO
;QREwT~H
public static interface Sort { zu^?9k
public void sort(int[] data); ?ti7iBz?
} }9<aX Y,
eV1O#FLbi
public static void swap(int[] data, int i, int j) { H:d{Sru
int temp = data; ` n@[=l~
data = data[j]; ' OdZ[AN
data[j] = temp; mL18FR N
} PIB|&I|p
} N;Hrc6nin^