[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; sF.oZ>
} \NZ(Xk
int i1=l; h D5NX
int i2=mid+1; ^Pwtu
for(int cur=l;cur<=r;cur++){ |ty?Ah,vb
if(i1==mid+1) 5:R$xgc
data[cur]=temp[i2++]; Zc!rL0T
else if(i2>r) ;*{"|l qe
data[cur]=temp[i1++]; qb$&BZj]|
else if(temp[i1] data[cur]=temp[i1++]; T'^ Do/
else DtEvt+h
data[cur]=temp[i2++]; ]u5B]ZQnA
} *sJT\J$D[
} gWk?g^KJL
0Y>5&
} ZYS`M?Au
bm>N~DC
改进后的归并排序: bwR$910b
lIhP\:;S&
package org.rut.util.algorithm.support; g49G7sk
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import org.rut.util.algorithm.SortUtil; W(4Mvd
y -6{>P/
/** %3%bRP
* @author treeroot o:wI{?%-3
* @since 2006-2-2 yf4I<v$y
* @version 1.0 9ZJn 8ki
*/ N4HIQ\p
public class ImprovedMergeSort implements SortUtil.Sort { 6y+_x'
kJ'rtz4QO
private static final int THRESHOLD = 10; :QoW*Gs1
AT6o~u!WU
/* \k4em{K
* (non-Javadoc) .#q]{j@Ot
* ohJo1}{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !eu\ShI
*/ y:HH@aa)
public void sort(int[] data) { Sj'Iz #
int[] temp=new int[data.length]; !-veL1r
mergeSort(data,temp,0,data.length-1); @D[tljc^
} v:F_!Q
L*6R5i>
private void mergeSort(int[] data, int[] temp, int l, int r) { WEaG/)y
int i, j, k; eIDrN%3
int mid = (l + r) / 2; Xi~7pH
if (l == r) H*H~~yQ
return; MD):g@
if ((mid - l) >= THRESHOLD) @?2ES@G+Ji
mergeSort(data, temp, l, mid); {{r.?m#{
else )Fsc0_
insertSort(data, l, mid - l + 1); Te6cw+6
if ((r - mid) > THRESHOLD) 39qIoaHT
mergeSort(data, temp, mid + 1, r); ;;|o+4Ob;
else ^?V9
insertSort(data, mid + 1, r - mid); Z g.La<#
6!Q,XHs
for (i = l; i <= mid; i++) { O0^?VW$y_
temp = data; ;7>k[?'e
} NNxzZ!q!
for (j = 1; j <= r - mid; j++) { <GWzdj?
temp[r - j + 1] = data[j + mid]; wS7nTZfw
} v]GQb
int a = temp[l]; 12VSzIm
int b = temp[r]; S[;d\Z]~
for (i = l, j = r, k = l; k <= r; k++) { L`"j>),
if (a < b) { aizJ&7(>
data[k] = temp[i++]; 6}cN7wnm j
a = temp; 3iIURSG@
} else { rT|wZz9$@
data[k] = temp[j--]; ?CD[jX}!
b = temp[j]; e?7Oom
} cC*H.N
} <y=+Gh
} ,p>@:C/M
0z$::p$%u
/** hHk9O?
* @param data $KVCEe!X
* @param l `%/w0,0
* @param i G,}"}v:
*/ Y 8n*o3jM
private void insertSort(int[] data, int start, int len) { 9i46u20
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z8ds`KZM
} ?j;,:n
} MW2{w<-]7
} `F$lO2#k
} onU\[VvM
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堆排序： 'Rb tcFb
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package org.rut.util.algorithm.support; hb<cynY
$x*(D|\'<
import org.rut.util.algorithm.SortUtil; ?[=OQ/E
X7rsO^}W
/** J(:y-U
* @author treeroot JRR,ooN*i
* @since 2006-2-2 F!<!)_8Q
* @version 1.0 g3 opN>W
*/ xpp>5d !
public class HeapSort implements SortUtil.Sort{ W1&"dT@
5]*!N
/* (non-Javadoc) KPAvNM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sDB,+1"Y$
*/ UP7?9\
public void sort(int[] data) { |=:<[FU
MaxHeap h=new MaxHeap(); 9&bJ]
h.init(data); C~IE_E&Q`
for(int i=0;i h.remove(); NM"5.
System.arraycopy(h.queue,1,data,0,data.length); s6QD^[
} zHKx,]9b
UyAy?i8K
private static class MaxHeap{ }tO>&$ Z6f
)x<BeD
void init(int[] data){ `B~zB=}
this.queue=new int[data.length+1]; Ig<# {V
for(int i=0;i queue[++size]=data; CK#i 6!~r
fixUp(size); iwy;9x
} [a_o3
} eQwvp`@"
}]Nt:_UCX
private int size=0; 3RF`F i
V KxuK0{
private int[] queue; 2wJa:=$
7GvMKtuSK
public int get() { k;Fxr%
return queue[1]; [1mEdtqf*
} V`8\)FFG
c#f@v45
public void remove() { x!6<7s
SortUtil.swap(queue,1,size--); vY7@1_"
fixDown(1); X}wo$t
} 4y.qtiIP>$
file://fixdown &smZ;yb|'h
private void fixDown(int k) { 8F&Y;
int j; ?G<ISiABQC
while ((j = k << 1) <= size) { pekNBq Wm
if (j < size %26amp;%26amp; queue[j] j++; $AizKiV
if (queue[k]>queue[j]) file://不用交换 xf{ZwS%X
break; IL1iTRH
SortUtil.swap(queue,j,k); !;4Hh)2
k = j; v o4U%
} K $WMrp
} Q/q>mN"#1
private void fixUp(int k) { B}"V.Msv/
while (k > 1) { <'QI_mP*
int j = k >> 1; )}P/xY0
if (queue[j]>queue[k]) cwOa"]t}
break; kS?CKd9by
SortUtil.swap(queue,j,k); ^wD`sj<Qg
k = j; ~(#iGc]7
} !b=W>5h
} *^w}SE(
Ss0I{0
} 8 C9ny}
FB:nkUR`
} ~9"c64 q
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SortUtil： e,r7UtjoxR
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package org.rut.util.algorithm; a`[9<AM1#
{5fL!`6w
import org.rut.util.algorithm.support.BubbleSort; O~v~s 'c&
import org.rut.util.algorithm.support.HeapSort; ^^lx Ot
import org.rut.util.algorithm.support.ImprovedMergeSort; :[CEHRc7x
import org.rut.util.algorithm.support.ImprovedQuickSort; mlPvF%Ba
import org.rut.util.algorithm.support.InsertSort; !>V)x
import org.rut.util.algorithm.support.MergeSort; , 6Jw
import org.rut.util.algorithm.support.QuickSort; Qm=iCZ|E^!
import org.rut.util.algorithm.support.SelectionSort; xI.0m
import org.rut.util.algorithm.support.ShellSort; ~4|Trz2T
'c_K[p$
/** l|{[vZpT
* @author treeroot ]G D` f
* @since 2006-2-2 \ @[Q3.VX
* @version 1.0 |fW_9={1kQ
*/ I~6 o<HO
public class SortUtil { &YcOmI/MM
public final static int INSERT = 1; N:okt)q:%
public final static int BUBBLE = 2; cRuN;
public final static int SELECTION = 3; zWv0y8[d
public final static int SHELL = 4; y=.bn!u}z
public final static int QUICK = 5; J .VZD
public final static int IMPROVED_QUICK = 6; O;5lF
public final static int MERGE = 7; ?;H}5>^8P
public final static int IMPROVED_MERGE = 8; Pjn{3/*wi
public final static int HEAP = 9; j@w1S[vt
:`Ep#[Wvo
public static void sort(int[] data) { d S'J@e=#
sort(data, IMPROVED_QUICK); z{FFTb^B
} 2Y<]X7Ch:
private static String[] name={ FE]UqB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;TS%e[lFhQ
}; #vhN$H:&q
N|Ag8/2A
private static Sort[] impl=new Sort[]{ Nd+1r|e'
new InsertSort(), GKjtX?~1
new BubbleSort(), H9PnJr8 \
new SelectionSort(), VX82n,'=t
new ShellSort(), 3Pllxq<n
new QuickSort(), jd,i=P%
new ImprovedQuickSort(), ~%C F3?e6
new MergeSort(), [0hahR
new ImprovedMergeSort(), A)V*faD
new HeapSort() 01n132k
}; y4LUC;[n
ggiy{CdR
public static String toString(int algorithm){ <9piKtb|L
return name[algorithm-1]; lSW'qgh
} IM7<z,*oF
z#ki# o
public static void sort(int[] data, int algorithm) { *z)gSX
impl[algorithm-1].sort(data); ,[t?$Cy;
} c{_JPy
\@WVeFr
public static interface Sort { dS3\P5D.*c
public void sort(int[] data); /PeT4hW}
} eU@Mv5&6
5 7t.Ud
public static void swap(int[] data, int i, int j) { 1kw*Q:
int temp = data; )dqNN tS
data = data[j]; 0 p?AL=
data[j] = temp; lux g1>
} @fJsRWvGq
} -4sKB>b