[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; a]>gDDF
} )O#]Wvr
int i1=l; ?Lbwo<E
int i2=mid+1; RFU(wek
for(int cur=l;cur<=r;cur++){ V7G?i\>
if(i1==mid+1) <x,u!}5J
data[cur]=temp[i2++]; q.yS j
else if(i2>r) Mc#uWmc 7
data[cur]=temp[i1++]; 3;zJ\a.+
else if(temp[i1] data[cur]=temp[i1++]; I,(m\NalK
else 3k`"%R.H
data[cur]=temp[i2++]; 9x0B9&
} N)K};yMf
} ZSuUmCm
b8P/9D7K?
} gbL99MZ@~
zm-j FY?
改进后的归并排序: " ;_bB"q*
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package org.rut.util.algorithm.support; <W2}^q7F^
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import org.rut.util.algorithm.SortUtil; $Q{)AN;m
LyH8T'C~
/** _iLXs
* @author treeroot kSv?p1\@&P
* @since 2006-2-2 Q^$IlzG7i
* @version 1.0 d/!sHr69
*/ "IA[;+_"
public class ImprovedMergeSort implements SortUtil.Sort { T8h.!Vef
sesr`,m.,
private static final int THRESHOLD = 10; :~3sW< PR
I&l1b>
/* 2+M(!FHfy
* (non-Javadoc) -l+&Bkf
* VI,z7 \
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \[Op:^S
*/ i;;CU9`E2q
public void sort(int[] data) { dE!{=u(!i
int[] temp=new int[data.length]; B(wk $2
mergeSort(data,temp,0,data.length-1); &Y%Kr`.h
} "%dWBvuO
s\_-` [B0
private void mergeSort(int[] data, int[] temp, int l, int r) { bAms-cXm
int i, j, k; -%*>z'|{
int mid = (l + r) / 2; 8+{WH/}y8
if (l == r) *M\Qt_[
return; UeV2`zIg`
if ((mid - l) >= THRESHOLD) D-\\L[
mergeSort(data, temp, l, mid); mVfg+d(
else ]|18tVXc
insertSort(data, l, mid - l + 1); zDeh#
if ((r - mid) > THRESHOLD) x tg3~/H
mergeSort(data, temp, mid + 1, r); >gM|:FG
else M>P-0IC
insertSort(data, mid + 1, r - mid); ;ZPAnd:pb
.%_scNP
for (i = l; i <= mid; i++) { U~-Z`_@^-
temp = data; rQg7r>%Q
} kD dY i7g>
for (j = 1; j <= r - mid; j++) { 1,=U^W.G
temp[r - j + 1] = data[j + mid]; hV#+joT8i
} <Z{\3X^
int a = temp[l]; }WS%nQA
int b = temp[r]; )` -b\8uw
for (i = l, j = r, k = l; k <= r; k++) { ^Crl~~Gk`
if (a < b) { ,uqSq
data[k] = temp[i++]; AX}l~ sv
a = temp; \!j{&cJ
} else { 9#{?*c6
data[k] = temp[j--]; p/>}{Q )Y
b = temp[j]; wcUf?`21,
} km,}7^?F0r
} mV^+`GWvo
} I$xfCu
G`!#k!&r
/** jG)fM?
* @param data mj=$[y(
* @param l tX$%*Uy
* @param i NlXHOUw)u
*/ :$."x '
private void insertSort(int[] data, int start, int len) { Ar7vEa81
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <\eHK[_*
} ^]o]'
} jv<BGr=4;
} EpSVHD:*
} e#JJd=
/*!K4)$-*2
堆排序： w^e<p~i!^E
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package org.rut.util.algorithm.support; Bm2"} =
= zW}vm }
import org.rut.util.algorithm.SortUtil; Zm,<2BP>
0][PL%3Z
/** ))V)]+
* @author treeroot [R*UPa
* @since 2006-2-2 GqBZWmAB
* @version 1.0 j:B?0~=
*/ x~C%Hp*#
public class HeapSort implements SortUtil.Sort{ [}q6bXM*
;W,XP#{W
/* (non-Javadoc) \M(0@#-$C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Eh&*"&fHR
*/ 0G ^73Z
public void sort(int[] data) { Cp=DdmR
MaxHeap h=new MaxHeap(); >Pj ?IE6
h.init(data); v?BX 4FO
for(int i=0;i h.remove(); hZf0q 2
System.arraycopy(h.queue,1,data,0,data.length); (@@t,\iF
} +#7e?B
W- 5Z"m1I
private static class MaxHeap{ O`1_eK~1<
@N,dA#
void init(int[] data){ N-EVHe'}6
this.queue=new int[data.length+1]; h'YC!hjp
for(int i=0;i queue[++size]=data; :S'P lH
fixUp(size); p&~8N#I#
} IoWh&(+KdH
} `wz@l:e
kaf4GME]
private int size=0; xU+c?OLi
<|9s{z
private int[] queue; `6;%HbP$W+
:"5'l>la
public int get() { |LA@guN
return queue[1]; D_er(
} rKg~H=4x2
.si!`?K%[
public void remove() { 0J7)UqMf.
SortUtil.swap(queue,1,size--); ,pL%,>R5
fixDown(1); N@Pf\D
} ?CIMez(h
file://fixdown 5<h7+ %?t9
private void fixDown(int k) { Jk=E"I6
int j; 'oSs5lW
while ((j = k << 1) <= size) { >KXSb@
if (j < size %26amp;%26amp; queue[j] j++; s{x{/Bp(KK
if (queue[k]>queue[j]) file://不用交换 .vHSKd{
break; %~Vgz(/
SortUtil.swap(queue,j,k); e@N@8i"q5
k = j; mTXeIng?
} +Qy0K5Ee
} 0Snl_@s
private void fixUp(int k) { UkK`5p<D7
while (k > 1) { >__t 2
int j = k >> 1; uj#bK 7
if (queue[j]>queue[k]) 5%M 'ewu
break; Q${0(#Nu
SortUtil.swap(queue,j,k); =yo?]ZS
k = j; M ^gva?{
} <Vucr
} ;LEO+,6
yg34b}m{
} B^Y AKbY
6t@kft>Nv
} A'Q=DoE
w5zrEk#
SortUtil： &,E^y,r
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package org.rut.util.algorithm; p2T<nP<Pt
W$&{jr-p
import org.rut.util.algorithm.support.BubbleSort; a&oz<4oT
import org.rut.util.algorithm.support.HeapSort; /4x3dwXW@
import org.rut.util.algorithm.support.ImprovedMergeSort; > Q[L,I
import org.rut.util.algorithm.support.ImprovedQuickSort; $M%<i~VXe&
import org.rut.util.algorithm.support.InsertSort; W~(4t:hp
import org.rut.util.algorithm.support.MergeSort; ( -^-
import org.rut.util.algorithm.support.QuickSort; #+$pE@u7A
import org.rut.util.algorithm.support.SelectionSort; n?uVq6c
import org.rut.util.algorithm.support.ShellSort; L[v-5u)
nO-1^HUl
/** $&IF#uDf
* @author treeroot ]6JI((
* @since 2006-2-2 JBzRL"|
* @version 1.0 [!Uzw2
*/ vb^/DMhz
public class SortUtil { i$`OOV=/e
public final static int INSERT = 1; "eKNk
public final static int BUBBLE = 2; #r{`Iv?nn
public final static int SELECTION = 3; c*F'x-TH
public final static int SHELL = 4; 6,Aj5jG
public final static int QUICK = 5; :)7{$OR&
public final static int IMPROVED_QUICK = 6; up`.#GWm
public final static int MERGE = 7; 4rXjso|
public final static int IMPROVED_MERGE = 8; /;P* ?
public final static int HEAP = 9; Y\#+-E
,]CZ(q9-
public static void sort(int[] data) { MPSoRA: h
sort(data, IMPROVED_QUICK); vm,/?]P
} S#gIfb<D
private static String[] name={ lJZ-*"9V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B?o ?LI
}; 2@!Ou$W
FUy!j|W6f
private static Sort[] impl=new Sort[]{ c;RB!`9"
new InsertSort(), [+7Nu
new BubbleSort(), s Yp?V\Y"
new SelectionSort(), Ekq&.qjYG"
new ShellSort(), -w7g}
new QuickSort(), #L,>)XkjS
new ImprovedQuickSort(), 47]?7GU,
new MergeSort(), x[%z \
new ImprovedMergeSort(), gZ{q85C.>
new HeapSort() UD.&p'^ /{
}; wO\,?SI4
lawjGI
public static String toString(int algorithm){ _4!SO5T
return name[algorithm-1]; \TchRSe
} J})#43P
$inpiO|s
public static void sort(int[] data, int algorithm) { 4i<V^go"
impl[algorithm-1].sort(data); :i{$p00 G
} xw1@&QwM
cSMiNR
public static interface Sort { z xe6M~+
public void sort(int[] data); Vs/Z8t
} s>d /9 b
X9:4oMux7
public static void swap(int[] data, int i, int j) { g7>p,
int temp = data; 8Xo`S<8VS
data = data[j]; FPg5!O%
data[j] = temp; :Ng4? +@r
} ;|nC;D]
} [X9s\H