[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; ]}d.h!`<)
} k[8{N
int i1=l; C7_nA:Rc
int i2=mid+1; |`Q2K9'4bL
for(int cur=l;cur<=r;cur++){ O>/&-Wk=
if(i1==mid+1) ~pPj
data[cur]=temp[i2++]; Y~P* !g
else if(i2>r) [_1K1i"m
data[cur]=temp[i1++]; li
else if(temp[i1] data[cur]=temp[i1++]; `Oe"s_O#
else *ulkqpO
data[cur]=temp[i2++]; ;{Tf:j'g
} }HxC~J"
} ]?UK98uS\A
JqP~2,T
} 2<TpNGXM_
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改进后的归并排序: ]_mcJ/6:
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package org.rut.util.algorithm.support; ,`U'q|b
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import org.rut.util.algorithm.SortUtil; &e;GoJ
8=WX`*-uH
/** UsnIx54D3
* @author treeroot de,4Ms!%
* @since 2006-2-2 B<!WAw+
* @version 1.0 M:R|hR{=*
*/ e<duDW$X
public class ImprovedMergeSort implements SortUtil.Sort { r%vO^8FQ
*9|*21
private static final int THRESHOLD = 10; gF~#M1!!
vhL/L?NB$
/* 7qEc9S@
* (non-Javadoc) 04@?Jb1*
* f1 Zj:3e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /m8&E*+T1
*/ VZCCMh-
public void sort(int[] data) { K yDPD'
int[] temp=new int[data.length]; yN9setw*,M
mergeSort(data,temp,0,data.length-1); a"whg~
} e8VtKVcY
R[f@g;h
private void mergeSort(int[] data, int[] temp, int l, int r) { 9 $Ud\
int i, j, k; LHHDD\X
int mid = (l + r) / 2; c-=z<:Kf
if (l == r) Mo0pN\A}h
return; `l}+BI`4
if ((mid - l) >= THRESHOLD) BB3wG*q
mergeSort(data, temp, l, mid); <iNxtD0
else \) vI-
insertSort(data, l, mid - l + 1); ;)'
if ((r - mid) > THRESHOLD) }J(o!2.
mergeSort(data, temp, mid + 1, r); 9y`Vg
else CkEbSa<)hK
insertSort(data, mid + 1, r - mid); r"=6s/q7
;Ff5ooL{
for (i = l; i <= mid; i++) { nPj &a
temp = data; &0JCZ/e
} nx|b9W<
for (j = 1; j <= r - mid; j++) { "XWO#,Ue
temp[r - j + 1] = data[j + mid]; zz1]6B*eX
} 1D2Yued
int a = temp[l]; T )"Uq
int b = temp[r]; eWU@@$9
for (i = l, j = r, k = l; k <= r; k++) { 7cly{U"
if (a < b) { <BhNmEo)2
data[k] = temp[i++]; E2yL9]K2
a = temp; =6< Am
} else { t[HA86X
data[k] = temp[j--]; %C~LKs5oH
b = temp[j]; #uCE0}N@
} Rd>PE=u
} V^qkHm e
} .;jp2^
m$80D,3
/** 5<mGG;F
* @param data sX|bp)Nw
* @param l 8mv}-;
* @param i 92=huV
*/ fSw6nEXn
private void insertSort(int[] data, int start, int len) { 8 CCA}lOG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YZQF*fj
} ]hjA,p@Q
} n}toUqUnk\
} ,,CheRO
} &b!|Y
B|.8+Q
堆排序： `;v>fTcy
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package org.rut.util.algorithm.support; <v[UYvZvY
Ncsk~=[
import org.rut.util.algorithm.SortUtil; q+?>shqsZ
hWfC"0
/** f1TYQ?e
* @author treeroot CZ}%\2>-v
* @since 2006-2-2 g"|Z1iy|9
* @version 1.0 6;%Ajx
*/ \. _TOE9L
public class HeapSort implements SortUtil.Sort{ OVhtU+r
Olltu"u
/* (non-Javadoc) x5"F`T>Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LL7un_EC
*/ -:!FQ'/7E
public void sort(int[] data) { Xi"<'E3_
MaxHeap h=new MaxHeap(); #xe-Yw1!
h.init(data); HG:9yP<,o
for(int i=0;i h.remove(); @&}~r
System.arraycopy(h.queue,1,data,0,data.length); {+^qm8n
} Fa^I 1fk
OYayTKxN
private static class MaxHeap{ iK=SK3)vR
;vLg4k
void init(int[] data){ 4j VFzO%.
this.queue=new int[data.length+1]; X2S:"0?7
for(int i=0;i queue[++size]=data; H*VZ&{\7
fixUp(size); >TB Rp,;r
} m8C scCZ}
} 1-:{&!
_MST8
private int size=0; p!RyxB1.|
$hE,BeQ
private int[] queue; 4}MZB*);0
2%gLq
public int get() { VVVw\|JB>
return queue[1]; PDtLJt$
} {j4J(dtO
qe_59'K
public void remove() { <WGx 6{
SortUtil.swap(queue,1,size--); {3R?<ET]mt
fixDown(1); 3*;S%1C^
} |8s45g>
file://fixdown \o=YsJ8U
private void fixDown(int k) { +y\mlfJ.-b
int j; Y.}8lh eH
while ((j = k << 1) <= size) { q:X&)f
if (j < size %26amp;%26amp; queue[j] j++; 3tAX4DnYrq
if (queue[k]>queue[j]) file://不用交换 MaQ`7U5 |e
break; v''F\V )
SortUtil.swap(queue,j,k); 5"o)^8!>
k = j; uszH1@g'
} siK:?A@4D
} fkWTO"f-
private void fixUp(int k) { @l^BW*BCo
while (k > 1) { z4iZE*ZS
int j = k >> 1; ~ $QNp#dq
if (queue[j]>queue[k]) HI*j6H?\
break; $ ";NS6 1
SortUtil.swap(queue,j,k); G@I/Dy
k = j; :bBMy\(u
} KQv97#n1
} Ub9p&=]h
`zBQ:_3J_
} >cM}M=4s
ewD=(yr
} ds|L'7
<|R`N)AV;
SortUtil： ~n)<L7
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package org.rut.util.algorithm; $9m>(b/;n
^s[OvJb
import org.rut.util.algorithm.support.BubbleSort; .GH#`j
import org.rut.util.algorithm.support.HeapSort; R<FW?z*
import org.rut.util.algorithm.support.ImprovedMergeSort; D8,V'n>L
import org.rut.util.algorithm.support.ImprovedQuickSort; d-BUdIz
import org.rut.util.algorithm.support.InsertSort; l7M![Ur
import org.rut.util.algorithm.support.MergeSort; [Adkj
import org.rut.util.algorithm.support.QuickSort; QH.zsqf(
import org.rut.util.algorithm.support.SelectionSort; =abBD
import org.rut.util.algorithm.support.ShellSort; dxAP7v
_hbTxyj
/** qsTB)RdjP%
* @author treeroot .X)TRD#MW
* @since 2006-2-2 9]^ CDL
* @version 1.0 JC}oc M j0
*/ Y9_OkcW)
public class SortUtil { ji:E
public final static int INSERT = 1; wS%aN@ay3
public final static int BUBBLE = 2; H% "R _[+
public final static int SELECTION = 3; m#kJ((~
public final static int SHELL = 4; [23F0-p
public final static int QUICK = 5; EXD Qr'"
public final static int IMPROVED_QUICK = 6; f1}am<
public final static int MERGE = 7; 6l|,J`G
public final static int IMPROVED_MERGE = 8; Sx|)GTJJ|-
public final static int HEAP = 9; )Fw{|7@N
xKW`m
public static void sort(int[] data) { [>y0Xf9^
sort(data, IMPROVED_QUICK); 4~YPLu
} rbD}fUg
private static String[] name={ +M %zOX/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G"&yE.E5
}; %\ef Mhn
ghu8Eg,Y
private static Sort[] impl=new Sort[]{ NP_b~e6O=
new InsertSort(), =n73bm
new BubbleSort(), etk@ j3#
new SelectionSort(), 0X'2d
new ShellSort(), ;\[el<Y)s
new QuickSort(), Ja(>!8H>@
new ImprovedQuickSort(), [sF z ;Py]
new MergeSort(), oiL^$y/:;z
new ImprovedMergeSort(), NL76 jF
new HeapSort() 5Dv;-G;
}; h%yw'?s
T~"T%r
public static String toString(int algorithm){ c2iPm9"eh
return name[algorithm-1]; C\WU<!
} ;DXcEzV
IS9}@5`'
public static void sort(int[] data, int algorithm) { $&l} ABn
impl[algorithm-1].sort(data); 1P1"xT
} ~Vf+@_G8`
M^twD*
public static interface Sort { *6b$l.Vs
public void sort(int[] data); *4<Kz{NF
} _Boe"
Sy?O(BMo
public static void swap(int[] data, int i, int j) { +_h1JE_}D
int temp = data; L dyTB@
data = data[j]; %:~LU]KX
data[j] = temp; 7[}K 2.W.
} Y::I_6[eV
} 5\6S5JyIL