[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; o$q})!
} Gg TrIF
int i1=l; 7ILb&JQ!%{
int i2=mid+1; [Fk|%;B/~
for(int cur=l;cur<=r;cur++){ 2]:Z7Ji
if(i1==mid+1) .(g"(fgF
data[cur]=temp[i2++]; ]L6[vJHx
else if(i2>r) &RB{0Qhx
data[cur]=temp[i1++]; &*j# [6
else if(temp[i1] data[cur]=temp[i1++]; 3Z_\.Z1R@
else -^ceTzW+
data[cur]=temp[i2++]; +?9. &<?
} 7MZ(tOR
} 328gTP1
CpLLsphy
} ;Z6ngS
iy-~CPNB_
改进后的归并排序: Fa+#bX7
6^vz+oN
package org.rut.util.algorithm.support; wNm1H[{
e| Sw+fhy<
import org.rut.util.algorithm.SortUtil; :meq4!g{1
#Y<QEGb(
/** zBjbH=
* @author treeroot ?s]+2Tq
* @since 2006-2-2 PblO?@~O
* @version 1.0 ;&9wG`
*/ %X -G(Z
public class ImprovedMergeSort implements SortUtil.Sort { O>,Rsj!e
$N/"c$50,
private static final int THRESHOLD = 10; 3)*Twqt
,V &RpKek
/* \Z8:^ct.P
* (non-Javadoc) _Gtq]`y
* UFPSQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z/oP?2/Afh
*/ WH lvd
public void sort(int[] data) { ana?;NvC
int[] temp=new int[data.length]; .azA1@V|
mergeSort(data,temp,0,data.length-1); M0K+Vz=
} _>u0vGF-
2)T.Ci cx
private void mergeSort(int[] data, int[] temp, int l, int r) { l*-$H$
int i, j, k; dQ-:]T (
int mid = (l + r) / 2; ov|/=bzro
if (l == r) "JpnmE[`
return; ~8tb^
if ((mid - l) >= THRESHOLD) |PutTcjQ
mergeSort(data, temp, l, mid); 3-4CGSX;X
else i1^#TC$x
insertSort(data, l, mid - l + 1); cr>"LAi
if ((r - mid) > THRESHOLD) u(C?\HaH
mergeSort(data, temp, mid + 1, r); XK,l9 {*
else vv^(c w>A
insertSort(data, mid + 1, r - mid); js F96X{
0oPcZ""X]
for (i = l; i <= mid; i++) { zC|y"PTw
temp = data; /2Qgg`^)
} dPb@[k
for (j = 1; j <= r - mid; j++) { Rd:wMy$
temp[r - j + 1] = data[j + mid]; rssn'h
} @f%q ,:
int a = temp[l]; ]:n! \G
int b = temp[r]; VjGtEIew
for (i = l, j = r, k = l; k <= r; k++) { D)GD9MJ
if (a < b) { 50HRgoP5Y
data[k] = temp[i++]; +&qj`hA-b
a = temp; 2`nOYK
} else { VhX~sJ1%Gp
data[k] = temp[j--]; -Ou@T#h"
b = temp[j]; uS&NRf9A
} ST25RJC
} +?y9EZB%
} <j&LC /]o
m8NKuhu
/** [.LbX`K:
* @param data ,Vr'F
* @param l b5Vn_;V*
* @param i HWxwG'EEY,
*/ rh$q]
private void insertSort(int[] data, int start, int len) { +Q!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KV]8o'
} ';Ew-u
} \iM
} jblj]/
} 9vw0box
$Y&rci]
堆排序： _S3qPPo3l]
5$Da\?Fpn
package org.rut.util.algorithm.support; L6f$ID:
=x^b
import org.rut.util.algorithm.SortUtil; #P5tTCM
<imIgt|`2
/** FCPiU3
* @author treeroot jw$[b=sa
* @since 2006-2-2 a534@U4,
* @version 1.0 J={R@}u
*/ .7v .DR>
public class HeapSort implements SortUtil.Sort{ <P#]U"?A
{v~.zRW%]r
/* (non-Javadoc) V]qv,>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7qT>wCVT
*/ fsH=2p
public void sort(int[] data) { 5V"g,]'Nd
MaxHeap h=new MaxHeap(); ,+hH|$
h.init(data); RT$.r5l_@
for(int i=0;i h.remove(); A0`#n|(Ad!
System.arraycopy(h.queue,1,data,0,data.length); LJ+Qe%|
} W*/0[|n*
60@]^g;$I
private static class MaxHeap{ FatLc|[
j& ~`wGM
void init(int[] data){ ZQ'bB5I
this.queue=new int[data.length+1]; LH]<+Zren
for(int i=0;i queue[++size]=data; :UDT! 5FNO
fixUp(size); qmWn$,ax
} ubZcpqm?Q
} U-0A}@N
LCf)b>C*
private int size=0; /swNhDQ"o
di5>aAJ)D
private int[] queue; N6wCCXd
]> 36{k]&
public int get() { ic]b"ItD
return queue[1]; 0}d^UGD
} = gbB)u-Pc
xQK;3b
public void remove() { hEv}g
SortUtil.swap(queue,1,size--); D<:J6W7]
fixDown(1); ::eYd23
} : ZWKrnG
file://fixdown cTQ]0<9:e
private void fixDown(int k) { H 6~6hg
int j; |NoTwK
while ((j = k << 1) <= size) { gvl3NQQ%t
if (j < size %26amp;%26amp; queue[j] j++; <4m@WG
if (queue[k]>queue[j]) file://不用交换 z6+D=<
break; a][QY1E@?
SortUtil.swap(queue,j,k); '|JBA.s|
k = j; 1{pU:/_W
} #y:,owo3I
} m_pqU(sP
private void fixUp(int k) { -IF3'VG
while (k > 1) { nnol)|C{5Y
int j = k >> 1; ^^C@W?.z
if (queue[j]>queue[k]) yl'@p5n
break; (yB)rBh>n
SortUtil.swap(queue,j,k); xG|T_|?
k = j; J jp)%c#_
} yv2N5IQ>{V
} dW`!/OaQD
i`hr'}x
} |1[3RnGS
UBZ37P
} g{d(4=FM
|*5803h
SortUtil： G&LOjd2
9KgGK cy%
package org.rut.util.algorithm; HZDeQx`*s
+thkx$o
import org.rut.util.algorithm.support.BubbleSort; f+K vym.
import org.rut.util.algorithm.support.HeapSort; jqeR{yo&0b
import org.rut.util.algorithm.support.ImprovedMergeSort; !i{9wI
import org.rut.util.algorithm.support.ImprovedQuickSort; ooW;s<6
import org.rut.util.algorithm.support.InsertSort; h]{V/
import org.rut.util.algorithm.support.MergeSort; O"6 (k{`
import org.rut.util.algorithm.support.QuickSort; i3[%]_eP.
import org.rut.util.algorithm.support.SelectionSort; lNwqWOWy
import org.rut.util.algorithm.support.ShellSort; T1YCld
V~%C me
/** a#L:L8T;j
* @author treeroot 5zf bI
* @since 2006-2-2 4 [K"e{W3
* @version 1.0 'Jl |-RUd
*/ 7}r6mr0vpm
public class SortUtil { 8uq`^l%KkZ
public final static int INSERT = 1; W7PL]5y&
public final static int BUBBLE = 2; =}1)/gcM
public final static int SELECTION = 3; }#Gq*^w
public final static int SHELL = 4; EpsjaOmAF
public final static int QUICK = 5; ,^K}_z\9f
public final static int IMPROVED_QUICK = 6; 7XU$O$C
public final static int MERGE = 7; b$W~w*O
public final static int IMPROVED_MERGE = 8; %&[=%zc
public final static int HEAP = 9; #PJHwvr
"z6xS;
public static void sort(int[] data) { |3{"ANmm'
sort(data, IMPROVED_QUICK); WNmG'hlA
} &h<\jqN/
private static String[] name={ F).7%YfY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BGOajYD
}; uGW!~qAr*
49?wEm#
private static Sort[] impl=new Sort[]{ 0`y*7.Ip
new InsertSort(), L%Mj{fJ>Wm
new BubbleSort(), \)'5V!B|s
new SelectionSort(), FMNT0
new ShellSort(), 7]`l"=/z
new QuickSort(), &`^PO$
new ImprovedQuickSort(), p-o8Ctc?V
new MergeSort(), V7}]39m(s
new ImprovedMergeSort(), =73aME}
new HeapSort() h; "pAE
}; F+Dke>j
AdgZau[Y6
public static String toString(int algorithm){ epm ~
return name[algorithm-1]; WZ6'"Cz`
} kuI$VC
JUpb*B_z
public static void sort(int[] data, int algorithm) { pt_]&3\e
impl[algorithm-1].sort(data); 3o^~6A
} ~LF1$Cai
l&Cy K#B:\
public static interface Sort { F(DM$5z[
public void sort(int[] data); _fM=J+
} )zv"<>Q 6
dIq*"Ry+~
public static void swap(int[] data, int i, int j) { jb83Y>
int temp = data; GvTA/zA
data = data[j]; qF3s&WI
data[j] = temp; K0'= O
} TR&7AiqB
} Z/e^G f#i