[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; faqh }4
} (:TZ~"VY
int i1=l; QnJ(C]cW
int i2=mid+1; piy_9nk
for(int cur=l;cur<=r;cur++){ ;FI"N@z
if(i1==mid+1) +OTNn@!9
data[cur]=temp[i2++]; #xlT,:_:)
else if(i2>r) en1NFP
data[cur]=temp[i1++]; n}T;q1
else if(temp[i1] data[cur]=temp[i1++]; =Eimbk
else <-3_tu>l
data[cur]=temp[i2++]; Z~WUILx,
} > ]()#z
} EAE\'9T&g
REaU=-m-
} ~\C.Nm
Js'#=
改进后的归并排序: g6wL\g{29
4|EV`t}EV
package org.rut.util.algorithm.support; e; #"t
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import org.rut.util.algorithm.SortUtil; fzhCV
ZB|y
/** F(5(cr 7K
* @author treeroot TSPFi0PP
* @since 2006-2-2 lZI?k=rWv
* @version 1.0 VEtdp*ot
*/ MD62ObK!
public class ImprovedMergeSort implements SortUtil.Sort { =;!$Qw4
jJB+UF=
private static final int THRESHOLD = 10; =MP?aH [
;%/Kh :Vg
/* b;AGw3SF
* (non-Javadoc) w:0=L`<Eu
* jIOrB}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x U1](O
*/ ux 7^PTgcO
public void sort(int[] data) { Te:4z@?
int[] temp=new int[data.length]; L]_1z
mergeSort(data,temp,0,data.length-1); 1lf5xm.
} 10C,\
\]a@ NBv
private void mergeSort(int[] data, int[] temp, int l, int r) { bV~z}V&
int i, j, k; MeSF,*lP
int mid = (l + r) / 2; %xH2jf
if (l == r) =HGC<#
return; js~?y|e8k
if ((mid - l) >= THRESHOLD) 7H~J?_
mergeSort(data, temp, l, mid); ap7ZT7KW
else a'U}.w}
insertSort(data, l, mid - l + 1); T/b%,!N)
if ((r - mid) > THRESHOLD) x_yQoae
mergeSort(data, temp, mid + 1, r); $^ wqoW%t
else "G+g(?N]j
insertSort(data, mid + 1, r - mid); wVw?UN*rm;
\TF='@u.
for (i = l; i <= mid; i++) { ;#goC N.
temp = data; aJmSagr69C
} >;9+4C<z0
for (j = 1; j <= r - mid; j++) { YVpsf8R
temp[r - j + 1] = data[j + mid]; !qF U
} ]3%( '8/
int a = temp[l]; `wzb}"gLsM
int b = temp[r]; x'c%w:
for (i = l, j = r, k = l; k <= r; k++) { 2A5R3x=\
if (a < b) { |IL/F]I
data[k] = temp[i++]; { !;I4W%!
a = temp; AxbQN.E
} else { h:J0d~u
data[k] = temp[j--]; hyPVt6Gkj
b = temp[j]; v*pN~}5
} &ml7368@
} +Ui @3Q
} fC\Cx;q-
\N[Z58R !z
/** N"+o=nS
* @param data tcm?qro)
* @param l $0f(Gc|
* @param i M`~UH\
*/ g<@P_^vo
private void insertSort(int[] data, int start, int len) { sFvu@Wm'7W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); feI%QnK)U
} ,?OWwm&J
} O:'ENoQ:&
} gHB*u!w7Z
} ^ |xSU_wa
}r+(Z.BHM
堆排序： 7jZE(|G-
mn>$K"_k
package org.rut.util.algorithm.support; ~g6`Cp`
!b=jD;<
import org.rut.util.algorithm.SortUtil; ~o+:M0)}
jgz}
/** Zs$Qo->F
* @author treeroot x+=Ko
* @since 2006-2-2 \E!a=cL!
* @version 1.0 #jc+2F,+{
*/ qt.G_fOz
public class HeapSort implements SortUtil.Sort{ NQFMExg,
n.323tNY
/* (non-Javadoc) " 0:&x n8L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;aY.CgX
*/ MPtn$@
public void sort(int[] data) { doERBg`Jh
MaxHeap h=new MaxHeap(); MHm=X8eg
h.init(data); x$6`k
for(int i=0;i h.remove(); ~$bkWb*RJ
System.arraycopy(h.queue,1,data,0,data.length); 0# )I:5
} r}9a31i
/CE]7m,7~K
private static class MaxHeap{ vq.~8c1
;?*`WB
void init(int[] data){ =Fd!wkB'{
this.queue=new int[data.length+1]; GW29Rj1
for(int i=0;i queue[++size]=data; 06Irx^n
fixUp(size); "L(4 EcO@
} /F(wb_!
} JFJ_ PphvD
z`?{5v -Qs
private int size=0; n)n>|w_
~"Kf+eFi
private int[] queue; #lf3$Tm D
w6PKr^
public int get() { J#```cB
return queue[1]; 5)T=^"IHXi
} \L-K}U>J
&V$qIvN$
public void remove() { o/;kzi
SortUtil.swap(queue,1,size--); w`N|e0G@
fixDown(1); BotGPk><c
} ~=!d>f~U
file://fixdown N`G* h^YQ
private void fixDown(int k) { }%&hxhR^t3
int j; 5yh:P3 /
while ((j = k << 1) <= size) { zE~{}\J
if (j < size %26amp;%26amp; queue[j] j++; XMR$I&;G8
if (queue[k]>queue[j]) file://不用交换 w;=fi}<G|e
break; ;T9u$4<
SortUtil.swap(queue,j,k); tR!!Q
k = j; uA'S8b%C
} :Z}d#Rbl
} ]d}h`!:
private void fixUp(int k) { $s*nh>@7
while (k > 1) { $,/;QP}
int j = k >> 1; DaA9fJ7a
if (queue[j]>queue[k]) d~G, *
break; D.Q9fa&P
SortUtil.swap(queue,j,k); !vaS fL*]
k = j; p}b:(QN~m
} c Nhy.Z~D
} 4P>[]~S
GH6HdZ
} 4;rt|X77
JTw< 4]
} vM.Y/,7S
_7)>/YK?}4
SortUtil： B"07:sO
8|Q=9mmWOh
package org.rut.util.algorithm; j56#KNAha
:c*_W /
import org.rut.util.algorithm.support.BubbleSort; _F2R x@Y
import org.rut.util.algorithm.support.HeapSort; g!#M0
import org.rut.util.algorithm.support.ImprovedMergeSort; 4*)a3jI?
import org.rut.util.algorithm.support.ImprovedQuickSort; ^B>BA
import org.rut.util.algorithm.support.InsertSort; 4TPAD)C
import org.rut.util.algorithm.support.MergeSort; d){o#@
import org.rut.util.algorithm.support.QuickSort; YqJ `eLu
import org.rut.util.algorithm.support.SelectionSort; Gr&)5hm$
import org.rut.util.algorithm.support.ShellSort; D?)^{)49
/K@_O\+;Q
/** q&:UP
* @author treeroot y1oQ4|KSI
* @since 2006-2-2 ^`HP&V
* @version 1.0 2"'<Yk9
*/ "vH>xBR[%
public class SortUtil { tK|jh
public final static int INSERT = 1; pX\Y:hCug
public final static int BUBBLE = 2; *_qW;l7
public final static int SELECTION = 3; E#0_y4
public final static int SHELL = 4; >Q`\|m}x)Q
public final static int QUICK = 5; )jS9p~FS
public final static int IMPROVED_QUICK = 6; hk +@ngh%
public final static int MERGE = 7; ]c Or$O*
public final static int IMPROVED_MERGE = 8; b3zxiq x
public final static int HEAP = 9; V5.=08L
2;v1YKY
public static void sort(int[] data) { cC NyW2'
sort(data, IMPROVED_QUICK); k3 YDnMRA9
} <\9M+
private static String[] name={ T[?toqkD>z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3eg)O34
}; Wubvvm8U
"-WEUz
private static Sort[] impl=new Sort[]{ Bb~Q]V=x;
new InsertSort(), h@^d Vg
new BubbleSort(), w~3~:w$
new SelectionSort(), gsSUmf1
new ShellSort(), 1-h"1UN2E
new QuickSort(), e[>c>F^
new ImprovedQuickSort(), *(?tf{
new MergeSort(), T>!Y-e.q
new ImprovedMergeSort(), /qKO9M5A
new HeapSort() y5p)z"
}; "8NhrUX
~"Q24I
public static String toString(int algorithm){ -;i vBR
return name[algorithm-1]; 0bcbH9) 1q
} <%SG <|t
`veq/!
public static void sort(int[] data, int algorithm) { n/&}|998?
impl[algorithm-1].sort(data); #},4m
} kT=KxS{
1luRTI8^
public static interface Sort { }Qqi013E L
public void sort(int[] data); &>YdX$8x
} ;PA^.RB
[yEH!7
public static void swap(int[] data, int i, int j) { C{5bG=Sg~
int temp = data; R9!GDKts%
data = data[j]; ; xz}]@]Ar
data[j] = temp; O1 KT
} Z ZMz0^V
} I?z*.yA*