[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; N i^pP@('
} Yg%V
int i1=l; 6YT*=\KT
int i2=mid+1; &G55<tRE
for(int cur=l;cur<=r;cur++){ &Qghm o
if(i1==mid+1) ))63?_
data[cur]=temp[i2++]; %@(6,^3%i
else if(i2>r) ?7:"D e
data[cur]=temp[i1++]; hMw}[6m
else if(temp[i1] data[cur]=temp[i1++]; nZQZ!Vfj
else $i@5'[jA
data[cur]=temp[i2++]; ?|^1-5l3
} ;D]TPBE
} (JFa
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} hmkcWr`
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改进后的归并排序: FQi"OZHq
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package org.rut.util.algorithm.support; $y=sT({VVe
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import org.rut.util.algorithm.SortUtil; n2-R[W^
=}7wpTc,
/** @N.W#<IG
* @author treeroot zE.4e&m%Z?
* @since 2006-2-2 fx.FHhVu
* @version 1.0 UeE& 8{=d
*/ T4Z("
public class ImprovedMergeSort implements SortUtil.Sort { 7K9+7I&C
`Pl=%DR
private static final int THRESHOLD = 10; `Y.RAw5LrE
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/* "DWw1{ 5/
* (non-Javadoc) oB3>0Pm*a.
* 2ok>z$Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ..;LU:F
*/ (B]Vw+/
public void sort(int[] data) { L0|Vc9
int[] temp=new int[data.length]; nC`#Hm.V%
mergeSort(data,temp,0,data.length-1); Tjure]wQz
} *GuCv3|
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private void mergeSort(int[] data, int[] temp, int l, int r) { 7Yj\*N
int i, j, k; $Ry NM2YI
int mid = (l + r) / 2; /[nt=#+
if (l == r) lKIHBi
return; 9 J5Z'd_
if ((mid - l) >= THRESHOLD) f{ S)wE>;
mergeSort(data, temp, l, mid); 1t!Mg{&e[x
else \/K>Iv'$
insertSort(data, l, mid - l + 1); 40%p lNPj
if ((r - mid) > THRESHOLD) 9FK:lFGD
mergeSort(data, temp, mid + 1, r); >1s:F5u"
else nEOhN
insertSort(data, mid + 1, r - mid); >tP/"4c
7-e)V{A`w
for (i = l; i <= mid; i++) { KU33P>a"[k
temp = data; .:RoD?px
} [Z Ea3/
for (j = 1; j <= r - mid; j++) { Bb:jy!jq_
temp[r - j + 1] = data[j + mid]; *N'B(j/
} ?\\ ]u
int a = temp[l]; h"%6tpV-
int b = temp[r]; tGmyTBgx
for (i = l, j = r, k = l; k <= r; k++) { N.eSf
if (a < b) { 7SAu">lIl
data[k] = temp[i++]; oL}FD !}
a = temp; z=)5M*h
} else { %I Y-0\
data[k] = temp[j--]; 8Qu].nKe
b = temp[j]; [zf9UUc~
} f.+e
} l`$f@'k
} {!oO>t
Y]8l]l 1
/** {2Gp+&
* @param data +~FH'DsT
* @param l _,Fwt
* @param i F>*w)6 4~
*/ nsgNIE{>gO
private void insertSort(int[] data, int start, int len) { ?wwY8e?S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fXL>L
} l@#X]3h!
} NJl|/(]v
} :^iR&`2~
} j1d#\
} A#C
堆排序： 2~]c`/M3
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package org.rut.util.algorithm.support; v/yk T9@;
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import org.rut.util.algorithm.SortUtil; gn(n</\/O
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/** Nt/*VYUn
* @author treeroot HM[BFF[;/
* @since 2006-2-2 kFk+TXLDIt
* @version 1.0 O~aS&g/sf
*/ &a:>P>\
public class HeapSort implements SortUtil.Sort{ de ](l687I
pd X9G
/* (non-Javadoc) dwx1EdJ{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9,,v0tE
*/ TvdmgVNP
public void sort(int[] data) { $h_@`j
MaxHeap h=new MaxHeap(); n}MG
h.init(data); ,9+@\
for(int i=0;i h.remove(); 'w9tZO\2
System.arraycopy(h.queue,1,data,0,data.length); ',1rW
} xOu cZ+
,hOJe=u46
private static class MaxHeap{ 7?hCt
?on3z
void init(int[] data){ b$gDFNa
this.queue=new int[data.length+1]; S%%>&^5
for(int i=0;i queue[++size]=data; CB|z{(&N
fixUp(size); j@9nX4Z
} l_f"}l
} H uE*jQ
>/'WU79TYE
private int size=0; `C!Pe84(
s` S<BX7
private int[] queue; *Li;:b"t
QCtG #/
public int get() { T\cdtjk
return queue[1]; , H[o.r=
} VJ1`&
bt j\v[D
public void remove() { 9Xm"kVqd/
SortUtil.swap(queue,1,size--); |`O7>(h
fixDown(1); F`?pZ
} Za01z^
file://fixdown N$=<6eQm
private void fixDown(int k) { fYCAwS{
int j; +p43d:[
while ((j = k << 1) <= size) { Vx#xq#wK
if (j < size %26amp;%26amp; queue[j] j++; H-UMsT=g]
if (queue[k]>queue[j]) file://不用交换 (iS94}-)
break; z-,U(0 .
SortUtil.swap(queue,j,k); %gf8'Q
k = j; D@j `'&G
} 2+?M(=4
} X$st{@}ZB
private void fixUp(int k) { zR`]8E]
while (k > 1) { x3M`l|
int j = k >> 1; i.byHz?/
if (queue[j]>queue[k]) ^AEg?[q
break; ZMx<:0ai
SortUtil.swap(queue,j,k); 6SidH_&C
k = j; p$"*U[%l
} ="I]D I
} Pp.X Du
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} EIf~>AI
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} o\2#}eie
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SortUtil： b1s1;8Q
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package org.rut.util.algorithm; 9h9Y:i*Gh5
#~ >0Dr
import org.rut.util.algorithm.support.BubbleSort; ?.~@lE
import org.rut.util.algorithm.support.HeapSort; Kk/qd)nk
import org.rut.util.algorithm.support.ImprovedMergeSort; fCF93,?$
import org.rut.util.algorithm.support.ImprovedQuickSort; b8`O7@ar
import org.rut.util.algorithm.support.InsertSort; %F{@DN`
import org.rut.util.algorithm.support.MergeSort; f:BW{Cij;y
import org.rut.util.algorithm.support.QuickSort; \GPWC}V\s
import org.rut.util.algorithm.support.SelectionSort; l[h??C`
import org.rut.util.algorithm.support.ShellSort; n7Re@'N<
&Wn!W
/** @h$7C<
* @author treeroot US Q{o
* @since 2006-2-2 k-w._E <
* @version 1.0 fM8 :Nt$
*/ q|Ga
public class SortUtil { >B3_P4pW9
public final static int INSERT = 1; `[`eg<xj
public final static int BUBBLE = 2; b9"Q.*c<Z^
public final static int SELECTION = 3; ousoG$Pc
public final static int SHELL = 4; EW YpYMkm
public final static int QUICK = 5; YgVZq\AV"
public final static int IMPROVED_QUICK = 6; Y%Saz+
public final static int MERGE = 7; Lo !kv*
public final static int IMPROVED_MERGE = 8; b ~F85U2
public final static int HEAP = 9; DuCq16'0T
:MJTmpq,
public static void sort(int[] data) { *DU86JL`
sort(data, IMPROVED_QUICK); O*c+TiTb
} G`TO[p]q
private static String[] name={ L]9*^al
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9v/1>rziE
}; ON!1lS
eP;lH~!.0
private static Sort[] impl=new Sort[]{ [dUW3}APV
new InsertSort(), H'2pmwk
new BubbleSort(), $e0sa=/
new SelectionSort(), AC 3 ;i
new ShellSort(), =G*<WcR
new QuickSort(), /J5wwQ (:
new ImprovedQuickSort(), LnM+,cBz
new MergeSort(), E*k=8$Y
new ImprovedMergeSort(), G0<m3 Up
new HeapSort() CbwQ'c$}
}; C~kw{g+|
!v$hqNt7
public static String toString(int algorithm){ rw58bkh6
return name[algorithm-1]; QCMt4`%'u
} Q?Q!D+~mND
^gD&NbP8
public static void sort(int[] data, int algorithm) { wl}Q|4rZ
impl[algorithm-1].sort(data); esFBWJ
} ?|{P]i?)'
6J-tcL*4"%
public static interface Sort { .p <!2
public void sort(int[] data); 3rOv j&2
} f`vB$r>
])vM# f
public static void swap(int[] data, int i, int j) { z,$^|'pP
int temp = data; ofRe4 *\j
data = data[j]; UDGVq S!,E
data[j] = temp; @#;~_?$?C
} = q;ACW,z
} qJrK?:O;