[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; ;Nd'GA+1;(
} JkKbw&65
int i1=l; sj6LrE=1
int i2=mid+1; Oc5f8uv
for(int cur=l;cur<=r;cur++){ U U#tm
if(i1==mid+1) 5tEkQ(Ei8
data[cur]=temp[i2++]; ;s8\F]K
else if(i2>r) Q`Rn,kCVy
data[cur]=temp[i1++]; C u1G8t-
else if(temp[i1] data[cur]=temp[i1++]; B;2#Sa.
else =,X*40=
data[cur]=temp[i2++]; MooxT7
} D$E#:[
} hDc2T
"Jdi>{o8
} 8/;@4^Ux
Vt:\llsin
改进后的归并排序: t. DnF[
>;%LW} %
package org.rut.util.algorithm.support; b1%w+*d<z
[ u ^/3N
import org.rut.util.algorithm.SortUtil; !/X>k{
s+E4AG1r
/** ubc k{\.
* @author treeroot 4M+f#b1
* @since 2006-2-2 sejT] rJ
* @version 1.0 6P)DM
*/ ,k(B>O~o
public class ImprovedMergeSort implements SortUtil.Sort { fUZCP*7>
_rz\[{)
private static final int THRESHOLD = 10; 1K'cT\aFm
"~Zdv}^xS
/* md|I?vk
* (non-Javadoc) ,fo7. h4{
* XEN-V-Z%*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y.(m#&T
*/ MM( ,D& Z
public void sort(int[] data) { G&4D0f
int[] temp=new int[data.length]; 5xU}}[|~-
mergeSort(data,temp,0,data.length-1); I.`DBI#-f
} H}(WL+7
qac:"z'9
private void mergeSort(int[] data, int[] temp, int l, int r) { HrT@Df
int i, j, k; `G=+qti
int mid = (l + r) / 2; LLoV]~dvUu
if (l == r) LLMGs: [
return; 'R99m?"
if ((mid - l) >= THRESHOLD) %/ :&L+q
mergeSort(data, temp, l, mid); %ofq
else f"^t~q[VS
insertSort(data, l, mid - l + 1); 2X(2O':Uc
if ((r - mid) > THRESHOLD) f 0~Z@\
mergeSort(data, temp, mid + 1, r); +U?73cYN
else l_,6<wWp
insertSort(data, mid + 1, r - mid); Mgu9m8 `J
G;USVF-'K
for (i = l; i <= mid; i++) { 0T0I<t
temp = data; .k#O[^~]
} o,xy'
for (j = 1; j <= r - mid; j++) { 6j|~oMYP
temp[r - j + 1] = data[j + mid]; b{X.lz0
} rA@|nL{
int a = temp[l]; jR*iA3LDo
int b = temp[r]; jaMpi^C
for (i = l, j = r, k = l; k <= r; k++) { m~&>+q ^7
if (a < b) { yA7O<p+
data[k] = temp[i++]; \Rha7O
a = temp; = \K/ulZo
} else { Yk*_u}?#
data[k] = temp[j--]; V9%9nR!'
b = temp[j]; ^;?w<9Y
} SCfk!GBVD
} ETR7%0$r
} ?zVcP=p@
!~j9Oc^
/** {96NtR0Z
* @param data Zjs,R{
* @param l D7c+/H@PF
* @param i IWwOP{ <ZQ
*/ t{B6W)q
private void insertSort(int[] data, int start, int len) { >,rzPc)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |C,]-mJG
} %O{FZgi%wA
} uVXn/B
} vY[u;VU
} %f(4jQ0I
)ub!tm
堆排序： WMFn#.aY5
cvx"XxE,
package org.rut.util.algorithm.support; >z,Y%A
}R:oWR
import org.rut.util.algorithm.SortUtil; y;O 6q206
=CL,+
/** |@?='E?h
* @author treeroot a(h@4 x
* @since 2006-2-2 WJ 'lYl0+7
* @version 1.0 F(,SnSam
*/ ]HRHF'4
public class HeapSort implements SortUtil.Sort{ =Hj3o_g-
}Fu2%L>
/* (non-Javadoc) [u-=<hnoa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3@<m/%
*/ 5F:\U
public void sort(int[] data) { U)z1RHP|z
MaxHeap h=new MaxHeap(); JBISA _Y
h.init(data); <FN+
for(int i=0;i h.remove(); ](IOn:MuDE
System.arraycopy(h.queue,1,data,0,data.length); &((04<@e
} +^$;oG
HS1{4/
private static class MaxHeap{ {4%ddJn[.)
E>"SC\#7
void init(int[] data){ "`w*-O
this.queue=new int[data.length+1]; viVn
for(int i=0;i queue[++size]=data; R!rMrWX
fixUp(size); TdoH((nY
} cL"Ral-qB
} 5+)_d%v=6!
O /h1ew
private int size=0; QKoJxjR=^
T$V8n_;
private int[] queue; mrVN&.
foI:`]2"*
public int get() { V0gu0+u~R
return queue[1]; W5&KmA
} (c[DQSj
>waA\C}
public void remove() { _G)x\K]N
SortUtil.swap(queue,1,size--); -1R7 8(1
fixDown(1); 2%]#rZ
} `Cu9y+t
file://fixdown 7[}WvfN8#
private void fixDown(int k) { zaE!=-U
int j; *mN8Qd
while ((j = k << 1) <= size) { ;47=x1ji
if (j < size %26amp;%26amp; queue[j] j++; "&mwrjn"T
if (queue[k]>queue[j]) file://不用交换 u5,vchZ
break; rE\&FVx
SortUtil.swap(queue,j,k); *`tQX$F
k = j; v/`#Gu^P
} s1T}hp
} 14y>~~3C4
private void fixUp(int k) { <-Ax)zE
while (k > 1) { @$wfE\_L
int j = k >> 1; YJwffV}nd
if (queue[j]>queue[k]) S @)P#
break; o7AI
SortUtil.swap(queue,j,k); 0LP>3"Sm
k = j; sWgzHj(c
} v)'Uoe"R%
} ay28%[Q b4
JOki4N
} <Oj'0NK-
*(VwD)*
} V_)465g
xf{=~j/L
SortUtil： 4{" v
a#3,qp!
package org.rut.util.algorithm; p vu% p8
1qwJPM
import org.rut.util.algorithm.support.BubbleSort; ]Vf2Mn=]"
import org.rut.util.algorithm.support.HeapSort; ab<7jfFIa
import org.rut.util.algorithm.support.ImprovedMergeSort; 9cMMkOM J
import org.rut.util.algorithm.support.ImprovedQuickSort; (HeIO
import org.rut.util.algorithm.support.InsertSort; 'W[Nr
import org.rut.util.algorithm.support.MergeSort; CWnRRZ}r
import org.rut.util.algorithm.support.QuickSort; JZD&u6tB
import org.rut.util.algorithm.support.SelectionSort; c$)!02
import org.rut.util.algorithm.support.ShellSort; zM'2opiUY
gac/%_-HH7
/** 'Ub\8<HfJU
* @author treeroot E^m2:J]G
* @since 2006-2-2 (DTkK5/%
* @version 1.0 IPnx5#eB
*/ Ly6) ,[q~
public class SortUtil { _Tma1~Gq
public final static int INSERT = 1; 0O?!fd n
public final static int BUBBLE = 2; hx@E,
public final static int SELECTION = 3; @ds.)sKA>
public final static int SHELL = 4; :?7^STc
public final static int QUICK = 5; _[J>GfQd
public final static int IMPROVED_QUICK = 6; /6p7k
public final static int MERGE = 7; wpm $?X
public final static int IMPROVED_MERGE = 8; <U""CAE
public final static int HEAP = 9; pKk{Q0Rt
Dn;$4Dak(
public static void sort(int[] data) { y Xi$w.gr
sort(data, IMPROVED_QUICK); 6;}FZ
} U6_GEBz~y
private static String[] name={ kn6X I*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "ODs.m oq
}; &4Y@-;REt
[b@9V_
private static Sort[] impl=new Sort[]{ F#7A6|
new InsertSort(), IQ9Rvnna
new BubbleSort(), ==~ lc;
new SelectionSort(), K_BF=C.k
new ShellSort(), {`[u XH?3d
new QuickSort(), z)pp{
new ImprovedQuickSort(), XO4rrAYvW
new MergeSort(), u[coWaPsZ
new ImprovedMergeSort(), 1${Cwb/F
new HeapSort() " G0HsXi
}; <:`x> _
<(2,@_~@r
public static String toString(int algorithm){ 'FGf#l<
return name[algorithm-1]; `z`"0;,7S
} ]WC@*3'kye
j;i7.B"[
public static void sort(int[] data, int algorithm) { Dad*6;+N
impl[algorithm-1].sort(data); v iM6q<Ht
} Z_?r5M;
/%h<^YDBf
public static interface Sort { ITEd[ @^d
public void sort(int[] data); :8Jn?E (36
} >*[Bq;
0D48L5kH#'
public static void swap(int[] data, int i, int j) { -8,lXrH
int temp = data; _cXLQ)-
data = data[j]; w]VdIS
data[j] = temp; z T#j.v
} rfc;
} NxQ+z^o\