[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; 2/sD#vC
} Bs =V-0
int i1=l; m=Y9sB
int i2=mid+1; [Tby+pC
for(int cur=l;cur<=r;cur++){ h`Vb#5ik
if(i1==mid+1) GeWB"(t
data[cur]=temp[i2++]; E)3B)(@&P
else if(i2>r) PvBx<i}A
data[cur]=temp[i1++]; cEnkt=
else if(temp[i1] data[cur]=temp[i1++]; P5*:r3>
else ,RKBGOz?f
data[cur]=temp[i2++]; I7r{&X) D
} QbP W_)N
} w-FZ`OA`D
g2L
} AT}}RE@vq
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改进后的归并排序: >};,Byv!%
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package org.rut.util.algorithm.support; 10_eUQN
iN8?~T}w
import org.rut.util.algorithm.SortUtil; g4<%t,(88E
'C+z
/** OYzt>hdH
* @author treeroot #B8`qFpQC
* @since 2006-2-2 }oigZI(1
* @version 1.0 !;{@O`j?b
*/ QIQB
public class ImprovedMergeSort implements SortUtil.Sort { [6K2V:6:
#QXv[%k
private static final int THRESHOLD = 10; [&|Le;h
0){%4
/* gn1`ZYg
* (non-Javadoc) >aW|W!.
* {R `IA|T#k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /_@S*=T5
*/ nL5Gr:SLo
public void sort(int[] data) { 7{RI`Er`
int[] temp=new int[data.length]; Ev0GAc1
mergeSort(data,temp,0,data.length-1); p^Ca-+R3
} Msn)jh
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private void mergeSort(int[] data, int[] temp, int l, int r) { =rl/l8|P
int i, j, k; y$r^UjJEO
int mid = (l + r) / 2; MG>g?s'!
if (l == r) Q-F'-@`(C
return; jV\M`=4IC
if ((mid - l) >= THRESHOLD) ;!, ]}2w*X
mergeSort(data, temp, l, mid); E$.|h;i]Q
else )b m|],'
insertSort(data, l, mid - l + 1); E"!9WF(2t5
if ((r - mid) > THRESHOLD) v\rOs+.s
mergeSort(data, temp, mid + 1, r); uEWWY t
else +cvz
insertSort(data, mid + 1, r - mid); GsqR8n=
vVc:[i
for (i = l; i <= mid; i++) { 0t}=F4@&a
temp = data; [#V"a:8m}
} _55T
for (j = 1; j <= r - mid; j++) { ,r{*o6
temp[r - j + 1] = data[j + mid]; 4U<'3~RN
} <]/`#Xgh
int a = temp[l]; m}:";>?#
int b = temp[r]; 2n?\tOm(V
for (i = l, j = r, k = l; k <= r; k++) { %=/Y~ml?
if (a < b) { vNLf)B
data[k] = temp[i++]; 8V_ ]}W
a = temp; fpM4q
} else { U(-9xp+
data[k] = temp[j--]; daWmF
b = temp[j]; |~8\{IcZ
} '97)c7E
} LnZ*,>1Z
} /4#.qq0\{c
>ly= O
/** j:"+/5rV8
* @param data }!0,(<EsV
* @param l nf,>l0,,'
* @param i [A|W0
*/ *0i
private void insertSort(int[] data, int start, int len) { 4v3y3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DG8$zl5
} $8_t.~q
} LoOyqJ,
} l6xC'c,jg
} =ADAMP
I m_yY
堆排序： c1wgb8
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package org.rut.util.algorithm.support; \>cZ=
9XT6Gf56
import org.rut.util.algorithm.SortUtil; `>?\MWyu
cy)L%`(7
/** sa#=#0yg
* @author treeroot $MKx\qx}
* @since 2006-2-2 1(w0*`
* @version 1.0 ]WN{8
*/ (loUO;S=
public class HeapSort implements SortUtil.Sort{ fL83:<RK
u~LisZ&tP
/* (non-Javadoc) Br]VCp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X_HR$il
*/ hz Vpv,|G
public void sort(int[] data) { m4E 6L
MaxHeap h=new MaxHeap(); hrZ~7 0r
h.init(data); <$UMMA
for(int i=0;i h.remove(); b$PNZC8f
System.arraycopy(h.queue,1,data,0,data.length); Y4@~NCU/
} $Y$!nPO
2s-f?WetbP
private static class MaxHeap{ i= ~HXr}
jA=uK6m
void init(int[] data){ GuM-H$,
this.queue=new int[data.length+1]; XS9k&~)*
for(int i=0;i queue[++size]=data; >+u5%5-wr
fixUp(size); W}Nd3
} 2r?g|< :
} q5lRc=.b[
Cd7jG
private int size=0; Se"\PxBR
YH':cze
private int[] queue; !\y_ik
C1p |.L?m
public int get() { v&H&+:<
return queue[1]; fQ#mx.|8y
} &^9f)xb
cJ!wZT`
public void remove() { 70HEu@-
SortUtil.swap(queue,1,size--); }xLwv=Ia
fixDown(1); *}ay
} X?>S24I"9
file://fixdown tjDVU7um
private void fixDown(int k) { ed{z^!w4
int j; }5Y.N7F
while ((j = k << 1) <= size) { &`@,mUi{Ac
if (j < size %26amp;%26amp; queue[j] j++; !!2~lG<]
if (queue[k]>queue[j]) file://不用交换 Ug_zyfr
break; `~@BU
SortUtil.swap(queue,j,k); LE1&atq
k = j; Pl1:d{"d
} `E!t,*(*E
} U%gP2]t%cs
private void fixUp(int k) { y::KjB 0
while (k > 1) { WgE~H)_%
int j = k >> 1; VrF]X#\)
if (queue[j]>queue[k]) `Yoafa
break; bnD>/z]E
SortUtil.swap(queue,j,k); uAVV4)
k = j; F{l,Tl"Jw
} ~p'/Z@Atu
} 'QCvN b6
~JC``&6E=}
} y9W*/H{[`
U?#6I-
} 0>Mm |x*5
QREIr |q'
SortUtil： ]NTHit^EX
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package org.rut.util.algorithm; >#!n"i;
DKK200j
import org.rut.util.algorithm.support.BubbleSort; zc/S
import org.rut.util.algorithm.support.HeapSort; i.F[.-.
import org.rut.util.algorithm.support.ImprovedMergeSort; <LBMth
import org.rut.util.algorithm.support.ImprovedQuickSort; !m_'<=)B4~
import org.rut.util.algorithm.support.InsertSort; zw5EaY
import org.rut.util.algorithm.support.MergeSort; q#OLb"bTr
import org.rut.util.algorithm.support.QuickSort; "<!|am(
import org.rut.util.algorithm.support.SelectionSort; rB=1*.}FLc
import org.rut.util.algorithm.support.ShellSort; "Jv&=zJ
AqN(htGvx
/** PCw.NJd$
* @author treeroot U,Z(h
* @since 2006-2-2 O~qB
* @version 1.0 dR$P-V\y`%
*/ o"[qPZd>
public class SortUtil { OY[N%wr!
public final static int INSERT = 1; 7F+f6(hB
public final static int BUBBLE = 2; %eD&2$q*
public final static int SELECTION = 3; 4jG@ #
public final static int SHELL = 4; /eIwv31
public final static int QUICK = 5; l l&iMj]
public final static int IMPROVED_QUICK = 6; >St
public final static int MERGE = 7; c:=Z<0S;
public final static int IMPROVED_MERGE = 8; I*ho@`U
public final static int HEAP = 9; T*YdGIFO
l8^^ O
public static void sort(int[] data) { Q8\Ks|u]
sort(data, IMPROVED_QUICK); NiWooFPKJ
} RCxqqUS\C
private static String[] name={ .'X$SF`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <Xl G:nmY
}; H2k>E}`
!_x-aro3<
private static Sort[] impl=new Sort[]{ xss D2*l
new InsertSort(), apw8wL2
new BubbleSort(), -O(.J'=8
new SelectionSort(), j5$Sm
new ShellSort(), =3 -G
new QuickSort(), Zqx5I~
new ImprovedQuickSort(), w7dG=a&
new MergeSort(), ia?8Z"&lK
new ImprovedMergeSort(), B'~.>,fg
new HeapSort() ;| \Ojuf
}; [k1N`K(M
[dt1%DD`M
public static String toString(int algorithm){ c&'T By
return name[algorithm-1]; ]^j)4us
} ->93.sge
snj+-'4T
public static void sort(int[] data, int algorithm) { \f
impl[algorithm-1].sort(data); bZtjg
} Mb$&~!
M%$zor
public static interface Sort { *7-uQKp
public void sort(int[] data); (_-zm)F7
} z` gR*+
B3I< $
public static void swap(int[] data, int i, int j) { j\Q_NevV
int temp = data; Gc SX5c
data = data[j]; 4|Z3;;%+
data[j] = temp; C:P,q6
} \ u5%+GA-:
} }1(F~6RH