[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; [Vo5$w
} v.jxG{~.
int i1=l; "ntP928
int i2=mid+1; K@O^\
for(int cur=l;cur<=r;cur++){ 7pyzPc#_
if(i1==mid+1) !=YKfzE
data[cur]=temp[i2++]; AzOs/q8O
else if(i2>r) \x}\)m_7M<
data[cur]=temp[i1++]; m[B#k$
else if(temp[i1] data[cur]=temp[i1++]; sF{aG6u
else X@\W* nq
data[cur]=temp[i2++]; E&P2E3P
} C_Ewu*T7
} =n5'~1?X?
4KM-$h,4O
} PW5]+ |#
H;1@]|sH#
改进后的归并排序: P0n1I7|
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package org.rut.util.algorithm.support; VLez<Id9(
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import org.rut.util.algorithm.SortUtil; X/,)KTo7
}4A] x`3
/** >[fu&r1
* @author treeroot ef7{D P
* @since 2006-2-2 @KQ.tF*
* @version 1.0 gJ \6cZD
*/ Tnp P'
public class ImprovedMergeSort implements SortUtil.Sort { G](4!G&
gc.Lh~
private static final int THRESHOLD = 10; #J"xByQKK
N*o{BboK;
/* UZyg_G6
* (non-Javadoc) q!ZM Wg
* |58HPW9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Vre)OrN#
*/ 0<uek
public void sort(int[] data) { UTD_rQ
int[] temp=new int[data.length]; hIJtu;}zU
mergeSort(data,temp,0,data.length-1); {%R^8
} *q=T1JY
{o}U"b<+Ra
private void mergeSort(int[] data, int[] temp, int l, int r) { )L:zr#
int i, j, k; [IL*}M!
int mid = (l + r) / 2; 0[MYQl`
if (l == r) @NLcO}
return; gM&IV{k3
if ((mid - l) >= THRESHOLD) ]M7FIDg
mergeSort(data, temp, l, mid); $Nu{c;7"
else F8f}PV]b
insertSort(data, l, mid - l + 1); .[Sis<A]%
if ((r - mid) > THRESHOLD) 1M]=Nv
mergeSort(data, temp, mid + 1, r); ubcB<=xb
else g+ c*VmY
insertSort(data, mid + 1, r - mid); ^65I,Z"
4S<M9A}
for (i = l; i <= mid; i++) { v675C#l(
temp = data; ?QOU9"@+B
} g#J`7n
for (j = 1; j <= r - mid; j++) { PI9,*rOy
temp[r - j + 1] = data[j + mid]; UMoj9/-
} }L\;W:0
int a = temp[l]; TN(Vzs%
int b = temp[r]; $UR:j8C{p$
for (i = l, j = r, k = l; k <= r; k++) { ^_WR) F'K
if (a < b) { LR97FG
data[k] = temp[i++]; EeW ,-I
a = temp; -S'KxC
} else { !5`MiH
data[k] = temp[j--]; S,m(
b = temp[j]; +A| Bc~2!
} Q|'f3\
} J:Cr.K`
} 4t, 2H"M
aLa<zEssz
/** D:z'`v0j
* @param data uvId],dQ5
* @param l A)f-r
* @param i 8q^}AT<C
*/ dli(ckr
private void insertSort(int[] data, int start, int len) { (` *BZ_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1'~Xn 4 f
} 7v5]%%E/
} 3l{V:x!9@
} jIol`WX
} ?qgQ)#6
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堆排序： 3s6obw$ki
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package org.rut.util.algorithm.support; |Y7SP]/`gB
(95|DCL
import org.rut.util.algorithm.SortUtil; #T=iS(i
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/** 'C]w3Rh'
* @author treeroot 7(Fas(j3
* @since 2006-2-2 586P~C[ic
* @version 1.0 >8f~2dH2%
*/ Ku(YTXtK
public class HeapSort implements SortUtil.Sort{ h^Wb<O`S
zI`I Q
/* (non-Javadoc) [:8\F#KW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 19E(Hsz
*/ ^O07GYF
public void sort(int[] data) { 2bt>t[0ad
MaxHeap h=new MaxHeap(); 4^F[Gp?
h.init(data); j4~(6Imm
for(int i=0;i h.remove(); q$:1Xkl
System.arraycopy(h.queue,1,data,0,data.length); RkYdK$|K
} Y%KowgP\
%7#<K\])
private static class MaxHeap{ ;UQGi}?CD
%_(vSpk
void init(int[] data){ FM{f{2j
this.queue=new int[data.length+1]; N!+=5!
for(int i=0;i queue[++size]=data; )/raTD
fixUp(size); c]6b|mHT
} 6S`_L
} \<7Bx[/D4
/Hr|u
private int size=0; B2;P%B
uo"<}>iJ
private int[] queue; 1j?P$%p
Y~"tL(WfJl
public int get() { gIB3DuUo
return queue[1]; Od!)MQ*,
} $qNF /rF
IiPX`V>RC
public void remove() { [\8rh^LFi
SortUtil.swap(queue,1,size--); I9X\@lTf
fixDown(1); @6;OF5VsQ
} `<7\Zl
file://fixdown $$9H1)Ny
private void fixDown(int k) { S\GWMB!oF
int j; 8E%LhA.
while ((j = k << 1) <= size) { #(^<qr
if (j < size %26amp;%26amp; queue[j] j++; |AYii-g
if (queue[k]>queue[j]) file://不用交换 4 &bmt
break; mskG2mA
SortUtil.swap(queue,j,k); 4.O)/0sU
k = j; XZE(& (s
} G5}_NS/
} ;hT3N UCA
private void fixUp(int k) { )D8op;Fn
while (k > 1) { UmR)L!QT8
int j = k >> 1; 8eXeb|?J
if (queue[j]>queue[k]) XGa8tI[:X
break; q5f QTV
SortUtil.swap(queue,j,k); ]#o;`5'
k = j; hek+zloB+
} Rhc:szDU
} 6n9/`D!
kV'zAF v
} *zdD4I=
4C;;V m4~
} 2S8;=x}/
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SortUtil： 9D3W_eIc
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package org.rut.util.algorithm; lR?y tIY
iv*RE9?^
import org.rut.util.algorithm.support.BubbleSort; EyK!'9~a
import org.rut.util.algorithm.support.HeapSort; d"|_NG`vr
import org.rut.util.algorithm.support.ImprovedMergeSort; PQaTS*0SXJ
import org.rut.util.algorithm.support.ImprovedQuickSort; dz^HN`AlzC
import org.rut.util.algorithm.support.InsertSort; }qWnn>h9xv
import org.rut.util.algorithm.support.MergeSort; cH_qHXi[G
import org.rut.util.algorithm.support.QuickSort; +`d92Tz
import org.rut.util.algorithm.support.SelectionSort; |f_'(-v`E
import org.rut.util.algorithm.support.ShellSort; c.>f,vtcn
>Na.C(DZ
/** K|%Am4
* @author treeroot ^G!cv
* @since 2006-2-2 mV}bQ^*?Z
* @version 1.0 xp|1yud
*/ RP~nLh3=\
public class SortUtil { t|U5]$5
public final static int INSERT = 1; u`v&URM
public final static int BUBBLE = 2; By1Tum+I1
public final static int SELECTION = 3; c7CYulm
public final static int SHELL = 4; \&F4Wl>`
public final static int QUICK = 5; +$C9@CZM9
public final static int IMPROVED_QUICK = 6; %R GZu\p
public final static int MERGE = 7; pA8bFtt
public final static int IMPROVED_MERGE = 8; CR [>5/:M
public final static int HEAP = 9; DuC#tDP
sc*R:"
public static void sort(int[] data) { rWr'+v?
sort(data, IMPROVED_QUICK); `l45T~`]$
} -r*|N.5c
private static String[] name={ [8'?G5/n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -mO#HZIq
}; q^xG%YdPz+
"M/c0`>C!i
private static Sort[] impl=new Sort[]{ ';R]`vWFe
new InsertSort(), -nGcm"'6F
new BubbleSort(), =-^A;AO(
new SelectionSort(), > TYDkEs0
new ShellSort(), Noj*K6
new QuickSort(), nmpc<&<<
new ImprovedQuickSort(), 7rD 8
new MergeSort(), #M!u';bZ
new ImprovedMergeSort(), %oiF} >
new HeapSort() gdIk%m4
}; /Xi21W/
3P!OP{`
public static String toString(int algorithm){ _i>_Sn1"
return name[algorithm-1]; `,4yGgD!4
} q{h,}[U=
!SuflGx,q
public static void sort(int[] data, int algorithm) { h;q&B9
impl[algorithm-1].sort(data); +pYgh8w@
} w10~IP
|47t+[b
public static interface Sort { ^p(aZj3k
public void sort(int[] data); A.*e8a/6X
} Rxdj}xy
g=mKTk
public static void swap(int[] data, int i, int j) { tQ@7cjq8bA
int temp = data; e (]]
data = data[j]; 3?D, Wu
data[j] = temp; z#gebr~_\
} {N]WVp*R
} :?~)P!/xl5