[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; o6|-=FcvC
} iZ;TYcT
int i1=l; @GGccF
int i2=mid+1; &1Fply7(Ay
for(int cur=l;cur<=r;cur++){ xjq0D[
if(i1==mid+1) 0ar=cuDm
data[cur]=temp[i2++]; hz)9"B\S
else if(i2>r) nb+m.X
data[cur]=temp[i1++]; Z$;"8XUM
else if(temp[i1] data[cur]=temp[i1++]; AS;.sjgk
else ;nB2o-%
data[cur]=temp[i2++]; _P5P(^/
} QnKC#
} qY(:8yC36
zWIeHIt
} +LzovC@^
dr})-R
改进后的归并排序: OVswt
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package org.rut.util.algorithm.support; e.;M.8N#SQ
fp&Got!pB
import org.rut.util.algorithm.SortUtil; zvf3b!}
h&'=F)5
/** vJCf~'
* @author treeroot #`/QOTnm2c
* @since 2006-2-2 |E|6=%^
* @version 1.0 9]$`)wZ
*/ v>-YuS
public class ImprovedMergeSort implements SortUtil.Sort { p&3> `C
ybvI?#
private static final int THRESHOLD = 10; I@./${o
R&So4},B
/* DO^y;y>
* (non-Javadoc) aRwnRii
* Ew4g'A:H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C\Ayv)S#2
*/ Hj~O49%j&
public void sort(int[] data) { Lq04T0
int[] temp=new int[data.length]; Q}P-$X+/ n
mergeSort(data,temp,0,data.length-1); E`AYee%l
} g6euXI
%v4 [{ =fE
private void mergeSort(int[] data, int[] temp, int l, int r) { #IX&9 aFB}
int i, j, k; :p-Y7CSSu
int mid = (l + r) / 2; dDlG!F_=
if (l == r) K`4GU[ul
return; GqUSVQ
if ((mid - l) >= THRESHOLD) POGw`:)A
mergeSort(data, temp, l, mid); #nEL~&
else i6>R qP!69
insertSort(data, l, mid - l + 1); y8?t-Pp]1
if ((r - mid) > THRESHOLD) yGEb7I$h
mergeSort(data, temp, mid + 1, r); }O*WV1
else Efr&12YSS
insertSort(data, mid + 1, r - mid); ;Qa;@
.,mPdVof
for (i = l; i <= mid; i++) { {tt$w>X
temp = data; \"d?=uFe
} p\S8oHWe
for (j = 1; j <= r - mid; j++) { n\= (S9
temp[r - j + 1] = data[j + mid]; z5EVG
} E5{n?e
int a = temp[l]; SDc" 4g`
int b = temp[r]; 3*WS"bt
for (i = l, j = r, k = l; k <= r; k++) { 2Xgx*'t\
if (a < b) { >&hX&,hG
data[k] = temp[i++]; H#+xKYrp
a = temp; ]{Ek[Av
} else { jG8;]XP
data[k] = temp[j--]; }m_t$aaUc1
b = temp[j]; kF-TG3
} hTTfJDF
} ,so4Lb(vG
} ^saM$e^c:
'v`_Ii|-
/** J@` 8($
* @param data ^<;w+%[MT
* @param l [TCRB`nTQF
* @param i JZ K7uB,X
*/ d_T<5Hin
private void insertSort(int[] data, int start, int len) { mP!N<K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1Z:R,\+L
} m!Af LSlwm
} $R-A '*U
} .)`-Hkxa
} @?/\c:cp
c[{UI
堆排序： 1S*P"8N}0h
xid:"y=_&
package org.rut.util.algorithm.support; ~:Ixmqi}R
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import org.rut.util.algorithm.SortUtil; *w 21U!
kY!C_kFcn
/** UE7'B?
* @author treeroot 6ZksqdP8
* @since 2006-2-2 <[9?Rj@
* @version 1.0 [;@):28"
*/ f0FP9t3k
public class HeapSort implements SortUtil.Sort{ (UcFNeo
z8tl0gd%D
/* (non-Javadoc) yFO)<GLk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4:3_ER]J
*/ p`p?li
public void sort(int[] data) { @g\;` #l
MaxHeap h=new MaxHeap(); *(nJX.7
h.init(data); UoRDeYQ`E
for(int i=0;i h.remove(); v= 8VvT8
System.arraycopy(h.queue,1,data,0,data.length); ?cxr%`E
} -yA3 RP
.C?GW1[c~@
private static class MaxHeap{ 1p=&WM
GLcd9|H
void init(int[] data){ 5Hy3\_ +
this.queue=new int[data.length+1]; ^S=cNSpC
for(int i=0;i queue[++size]=data; `EVg'?pl
fixUp(size); G"C;A`6
} kp; &cQu!
} OQc{ V
xp=Zd\5W$
private int size=0; Gc^t%Ue-H)
@T/qd>T o
private int[] queue; to51hjV
q_pmwJ:UL
public int get() { 1t#XQ?8
return queue[1]; 4y>(RrVG
} )-#i8?y3C
e?1KbJ?.
public void remove() { E[*0Bo]
SortUtil.swap(queue,1,size--); %-r?=L
fixDown(1); (GNEYf|
} ^(g_.>
file://fixdown WP!il(Gr
private void fixDown(int k) { 952V@.Zp
int j; RxMoD.kx
while ((j = k << 1) <= size) { |Q6h/"2
if (j < size %26amp;%26amp; queue[j] j++; %HVD^. V
if (queue[k]>queue[j]) file://不用交换 9R>~~~{-Go
break; GVZTDrC
SortUtil.swap(queue,j,k); + "zYn!0
k = j; kz_M;h>
} ]Y=S
} kw#X]`c3
private void fixUp(int k) { FR(QFt!g
while (k > 1) { FSe5k5
int j = k >> 1; &~}@u[=ux
if (queue[j]>queue[k]) )WclV~
break; V:8@)Hc=
SortUtil.swap(queue,j,k); vuW-}fY;
k = j; G}q<{<+$
} X7b!;%3@
} LGXZx}4@;
IF e+B"
} Yu;9&b
FF jRf
} V4Qz*z%
[lZ=s[n.
SortUtil： p_;r%o=
IOS^|2:,
package org.rut.util.algorithm; ;8uHRcdQ
&AJUY()8
import org.rut.util.algorithm.support.BubbleSort; m'c#uU
import org.rut.util.algorithm.support.HeapSort; <oQ6ZX
import org.rut.util.algorithm.support.ImprovedMergeSort; +2El
import org.rut.util.algorithm.support.ImprovedQuickSort; lj Y
import org.rut.util.algorithm.support.InsertSort; C,(j$Id
import org.rut.util.algorithm.support.MergeSort; 1NW>wo
import org.rut.util.algorithm.support.QuickSort; :Nkz,R?
import org.rut.util.algorithm.support.SelectionSort; zv,\@Z9.($
import org.rut.util.algorithm.support.ShellSort; $8=(I2&TW
n}f3Vrl
/** l-XnB
* @author treeroot wzg i @i
* @since 2006-2-2 <347 C{q
* @version 1.0 ]M uF9={
*/ ;tm3B2
public class SortUtil { ~RAzFLt6x
public final static int INSERT = 1; "7:u0p!
public final static int BUBBLE = 2; !#C)99L"F
public final static int SELECTION = 3; ?S8$5gA
public final static int SHELL = 4; waBRQh
public final static int QUICK = 5; 5R)[Ou.
public final static int IMPROVED_QUICK = 6; G%Y*q(VrEu
public final static int MERGE = 7; t Z+0}d
public final static int IMPROVED_MERGE = 8; MV9r5|3-
public final static int HEAP = 9; s* @QT8%
!eV^Ah>PZ
public static void sort(int[] data) { V@Ax}<$A
sort(data, IMPROVED_QUICK); _@7(g(pY 3
} 4^0\dq
private static String[] name={ ,=yOek}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0,bt^a
}; xJ$Rs/9C
S3nB:$_-;
private static Sort[] impl=new Sort[]{ ykJ+%gla
new InsertSort(), DZ,<Jmg&e*
new BubbleSort(), g~eJ YS,
new SelectionSort(), kja4!_d
new ShellSort(), XadG\_?t`
new QuickSort(), y(V&z"wk[
new ImprovedQuickSort(), { 576+:*
new MergeSort(), hZ%2?v`
new ImprovedMergeSort(), !'+\]eA
new HeapSort() X #&(~1O
}; !,I7 ?O
_xa}B,H
public static String toString(int algorithm){ H^ESAs6
return name[algorithm-1]; *Rz!i m|
} tWcizj;?wK
K3j_C`Se
public static void sort(int[] data, int algorithm) { 4fZY8
impl[algorithm-1].sort(data); ,"x23=]
} | pF5`dX
*sjj"^'=
public static interface Sort { ;OQ#@|D
public void sort(int[] data); fLLnf].O
} -/@|2!d
6s> sj7
public static void swap(int[] data, int i, int j) { IvY,9D
int temp = data; b0!*mrF]6
data = data[j]; oXnC"y}0P
data[j] = temp; 3| GNi~
} c(QG4.)m
} :y4)qF