[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; 57{T p:|
} 8b]4uI<
int i1=l; =-:%~ng
int i2=mid+1; o^X3YaS)
for(int cur=l;cur<=r;cur++){ 9|<Li[
if(i1==mid+1) KqJln)7
data[cur]=temp[i2++]; J+IItO4%
else if(i2>r) f<wYJGI
data[cur]=temp[i1++]; -+1O*L!
else if(temp[i1] data[cur]=temp[i1++]; dGOFSH
else tmS2%1o
data[cur]=temp[i2++]; i'H]N8,A
} 5Z; 5?\g
} j#2Xw25
}g-w[w 7p
} eo4z!@pRN
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改进后的归并排序: [HWVS
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package org.rut.util.algorithm.support; uXFI7vV6P
/mz.HCs
import org.rut.util.algorithm.SortUtil; K |=o-
z*jaA;#
/** |}:}14ty
* @author treeroot )u{]rb[
* @since 2006-2-2 |=YK2};
* @version 1.0 vi^YtA
*/ !;&\n3-W
public class ImprovedMergeSort implements SortUtil.Sort { PVlCj
o5&b'WUJ=
private static final int THRESHOLD = 10; K1J |\!o
<lIm==U<-
/* _xh)]R
* (non-Javadoc) t{iRCj
* k-n`R)p:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e`={_R{N
*/ W+Mw:,>*s
public void sort(int[] data) { p1d%&e
int[] temp=new int[data.length]; su=MMr>
mergeSort(data,temp,0,data.length-1); [06m{QJ)1
} Nkj$6(N=zJ
#6|ve?`I
private void mergeSort(int[] data, int[] temp, int l, int r) { E3j`e>Yz
int i, j, k; ?sdSi--
int mid = (l + r) / 2; A+Isk{d
if (l == r) td%J.&K_*'
return; Pd&KAu|<`
if ((mid - l) >= THRESHOLD) D`^wj FF
mergeSort(data, temp, l, mid); M&/4SVBF
else 9yTdbpY
insertSort(data, l, mid - l + 1); JW0\y+o~
if ((r - mid) > THRESHOLD) [Lje?M* r
mergeSort(data, temp, mid + 1, r); L:Rg3eo
else kJuG haO
insertSort(data, mid + 1, r - mid); wg)Bx#>\L:
B/a`5&G]
for (i = l; i <= mid; i++) { Xykoq"dbb
temp = data; ^"|q~2
} Ey:?!
for (j = 1; j <= r - mid; j++) { "Y:>^F;
temp[r - j + 1] = data[j + mid]; &Wa3/mWK
} ; k.@=
int a = temp[l]; ui)mYR[8X
int b = temp[r]; l#v52
for (i = l, j = r, k = l; k <= r; k++) { z{ eZsh b
if (a < b) { jSvq1$U
data[k] = temp[i++]; f:\)! &W
a = temp; [n/c7Pe
} else { ~;$QSO\2h
data[k] = temp[j--]; &1T)'Bn
b = temp[j]; g`'!Vgd?M[
} Brs6RkRf
} jq]5Y^e
} 5SUO`4L
'6NrL;
/** RICm$,
* @param data \e4AxLP
* @param l 6XA(<1P
* @param i =gSc{ i|
*/ D~"a"
private void insertSort(int[] data, int start, int len) { xF3FY0U[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L"9Z{o7
} 8vq-|p
} OT$Ne
} e?;c9]XO,o
} .u ikte
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堆排序： . U6(>6-
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package org.rut.util.algorithm.support; _/Ve~( "
BJ3<"D{.*4
import org.rut.util.algorithm.SortUtil; O, eoO,gB
)b]!IP3
/** ENqZ=Lyq
* @author treeroot %pxJ27Q
* @since 2006-2-2 rlh:|#GTJ
* @version 1.0 iTdamu`L
*/ kw z6SObQ
public class HeapSort implements SortUtil.Sort{ `,~'T [
RTd,bi*
/* (non-Javadoc) -`Z!p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1mtYap4
*/ ^bPpcm=
public void sort(int[] data) { 2jhJXM=~
MaxHeap h=new MaxHeap(); NGi)Lh|
h.init(data); 4=^Ha%l
for(int i=0;i h.remove(); M1/(Xla3
System.arraycopy(h.queue,1,data,0,data.length); 'C7R* P
} xC9?rLUZ
O{3X`xAf
private static class MaxHeap{ ]Kjt@F";
8dx7@y?z
void init(int[] data){ b/oNQQM#Dk
this.queue=new int[data.length+1]; ^zT=qBl
for(int i=0;i queue[++size]=data; |95K
fixUp(size); Tw$tE:
} (5Q<xJ
} o`QH8
\6 JY#%
private int size=0; '$p`3Oqi
~kV>nx2
private int[] queue; ;TDvk]:
m#[c]v{
public int get() { LrO[l0#'Q
return queue[1]; 8q]"CFpa
} +<@1)qZ(E
O\cc=7
public void remove() { `2+TN
SortUtil.swap(queue,1,size--); 32 j){[PL3
fixDown(1); 0 5?`W&:9
} F> Ika=z,
file://fixdown 8VU(+%X
private void fixDown(int k) { WQCnkP
int j; &m36h`tM
while ((j = k << 1) <= size) { T; [T`
if (j < size %26amp;%26amp; queue[j] j++; d,i4WKp
if (queue[k]>queue[j]) file://不用交换 fO5L[U^`
break; ( -q0!]E
SortUtil.swap(queue,j,k); uIO?4\s&G
k = j; .EWjeVq
} \rh+\9(
} tkptm%I_
private void fixUp(int k) { '6\w4J(
while (k > 1) { c^H#[<6p
int j = k >> 1; f:P;_/cJc
if (queue[j]>queue[k]) lz>.mXdx
break; .1^Kk3
SortUtil.swap(queue,j,k); R(_WTs9x4
k = j; +Q5'!@8
} so.}WU
} 9k62_]w@6
9i_@3OVl
} [Pq |6dz
>2K'!@~'
} 3zfpFgD!
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SortUtil： tr0kTW$Ad
%kkDitmI{
package org.rut.util.algorithm; r&v!2A]:
<x<qO=lq
import org.rut.util.algorithm.support.BubbleSort; J<"Z6 '0v
import org.rut.util.algorithm.support.HeapSort; &a\w+
import org.rut.util.algorithm.support.ImprovedMergeSort; &'/PEOu&}G
import org.rut.util.algorithm.support.ImprovedQuickSort; rcLF:gd]E
import org.rut.util.algorithm.support.InsertSort; +DefV,Ny
import org.rut.util.algorithm.support.MergeSort; $u,A/7\s
import org.rut.util.algorithm.support.QuickSort; B&KIM{j\
import org.rut.util.algorithm.support.SelectionSort; BUi,+NdIk
import org.rut.util.algorithm.support.ShellSort; rKOa9M
TL"+Iv2]/$
/** #NMQN*J>D
* @author treeroot }YC=q
* @since 2006-2-2 w0yzC0yBk
* @version 1.0 Xe`$SNM
*/ ^f(El(w
public class SortUtil { K4|fmgcy.
public final static int INSERT = 1; ebL0cK?
public final static int BUBBLE = 2; 75P!`9bE
public final static int SELECTION = 3; -; d{}F
public final static int SHELL = 4; 96!2@c{
public final static int QUICK = 5; XF3lS#pt
public final static int IMPROVED_QUICK = 6; {<Y!'WL{
public final static int MERGE = 7; r4 5}o
public final static int IMPROVED_MERGE = 8; !p36OEx
public final static int HEAP = 9; XH!n{Of
d{WOO)j
public static void sort(int[] data) { .}!.: |
sort(data, IMPROVED_QUICK); 3h o'\Ysu/
} +Swl$ab
private static String[] name={ F2(^OFh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cF9ZnT.
}; 4},Y0QXw
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private static Sort[] impl=new Sort[]{ )`|`PB
new InsertSort(), /a}N6KUi
new BubbleSort(), j{tr''yN
new SelectionSort(), w9x5IRWk
new ShellSort(), E6Uj8]P`
new QuickSort(), ?u{Mz9:?HT
new ImprovedQuickSort(), !qH)ttW
new MergeSort(), ^{8CShUCv
new ImprovedMergeSort(), X`E}2|q'
new HeapSort() R5},E
}; O#8lJ%?
Y!(w.G
public static String toString(int algorithm){ fpzEh}:H\
return name[algorithm-1]; (YPG4:[
} 4eaH.&&
//$^~}wt
public static void sort(int[] data, int algorithm) { La7}zXx
impl[algorithm-1].sort(data); BT -Y9j
} tB}W )Eb
Ms%C:KG
public static interface Sort { %f&Bt,xEo
public void sort(int[] data); ^s=F<_{
} yRhD<*
5ry[Lgg
public static void swap(int[] data, int i, int j) { Z\1`(Pq7`
int temp = data; 0!axAvBV
data = data[j]; n:<Xp[;R
data[j] = temp; ay{]Vqi9
} *`bES V :
} 6l"4F6