[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; ${\iHg[vZ
} x]o~ %h$
int i1=l; yT<6b)&*&
int i2=mid+1; TZ8:3ti
for(int cur=l;cur<=r;cur++){ Y?G9d6]Lk6
if(i1==mid+1) "&(.Z(
data[cur]=temp[i2++]; S*,DX~vig
else if(i2>r) BUR96YN.
data[cur]=temp[i1++]; ?B> {rj
else if(temp[i1] data[cur]=temp[i1++]; )U0`?kD
else TtA6N8G
data[cur]=temp[i2++]; \FOoIY!.x
} .OI&Zm-
} l1*qDzb
#~]S
} SSH))zJ
H4DM,.04
改进后的归并排序: {&Kck>C'
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package org.rut.util.algorithm.support; ,e\'Y!'
.$nQD.X
import org.rut.util.algorithm.SortUtil; ()K,~
1#LXy%^tO
/** ._2#89V
* @author treeroot S8-3Nv'
* @since 2006-2-2 u0^Vy#@_
* @version 1.0 yH}(0
*/ LLE\;,bv
public class ImprovedMergeSort implements SortUtil.Sort { z|,YO6(L
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private static final int THRESHOLD = 10; ]o}g~Xn
hgt@Mb
/* kY d'6+m
* (non-Javadoc) N<&"_jzm
* CJ+/j=i;~c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?U+^ctwv7
*/ Cu*+E%P9`
public void sort(int[] data) { D c5tRO
int[] temp=new int[data.length]; 45g:q
mergeSort(data,temp,0,data.length-1); 7K"{}:
} M*XAyo4fI
$7k"?M_
private void mergeSort(int[] data, int[] temp, int l, int r) { o< )"\f/,
int i, j, k; @PH`Wn#S
int mid = (l + r) / 2; 1<gY
if (l == r) KZ8Hp=s
return; z?T;2/_7
if ((mid - l) >= THRESHOLD) %t&
mergeSort(data, temp, l, mid); k@[\C`P
else n=t50/jV3=
insertSort(data, l, mid - l + 1); |qUi9#NUo
if ((r - mid) > THRESHOLD) X/< zxM
mergeSort(data, temp, mid + 1, r); ~SKV%
else .`./MRC
insertSort(data, mid + 1, r - mid); 1Q[I$=-F
"cJ))v-'
for (i = l; i <= mid; i++) { ;U+4!N
temp = data; QT\||0V~p
} Ag[Zs%X
for (j = 1; j <= r - mid; j++) { Kkfza
temp[r - j + 1] = data[j + mid]; *uJ0ZO9
} o[$~
int a = temp[l]; e@6]rl
int b = temp[r]; 5"~F#vt
for (i = l, j = r, k = l; k <= r; k++) { 8PKUg "p
if (a < b) { 1Ce7\A
data[k] = temp[i++]; Z5x&P_.x[
a = temp; RCZ"BxleU
} else { r{+P2MPW
data[k] = temp[j--]; hJ~Na\?w
b = temp[j]; &m{SWV+
} tVI6GXH
} 244[a] %&;
} 4gR;,%E\TO
@k+&89@G
/** +Tf4SJ
* @param data %XF>k)
* @param l B/Jz$D
* @param i h7r*5E
*/ }4Q~<2
private void insertSort(int[] data, int start, int len) { 3?%?J^/a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 38<Z=#S
} DxM$4
} KM-d8^\:
} 1>~bzXY#
} 0H9UM*O
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堆排序： e\8|6<o[
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package org.rut.util.algorithm.support; XRQz~Py
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import org.rut.util.algorithm.SortUtil; LyRbD$m
"O}u2B b
/** qV$\E=%fhM
* @author treeroot [SKN}:D
* @since 2006-2-2 0Dt-!Q7
* @version 1.0 Ji#eA[
*/ o;[?b'\[d
public class HeapSort implements SortUtil.Sort{ PTS dW~3
=Ch^;Wyt
/* (non-Javadoc) |Eyn0\OA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yg@8&;bP`
*/ o=zr]vv
public void sort(int[] data) { W(#u^,$e[
MaxHeap h=new MaxHeap(); c1Rn1M,2k
h.init(data); ^-^ii3G`
for(int i=0;i h.remove(); 634OH*6
System.arraycopy(h.queue,1,data,0,data.length); te[#FF3{
} m;4qs#qCg?
n^lr7(!6
private static class MaxHeap{ luWr.<1
,=IGqw
void init(int[] data){ 7g7[a/Bts
this.queue=new int[data.length+1]; GQH15_
for(int i=0;i queue[++size]=data; .&i_~?1[N
fixUp(size); @sdHB./
} +0l-zd\
} Q\W?qB_
{*PbD;/f
private int size=0; WGwIc7
1IPRI<1U
private int[] queue; '< .gKo
{j8M78}3
public int get() { [4 v1 N
return queue[1]; yM2}JsC
} w}qLI4
cjp~I/U
public void remove() { +HT?>k
SortUtil.swap(queue,1,size--); H$ZLtPv5
fixDown(1); 91#rP|88;
} ;5p;i8m
file://fixdown wJc`^gj
private void fixDown(int k) { Y"Ut
int j; FP<mFqy
while ((j = k << 1) <= size) { &cp `? k
if (j < size %26amp;%26amp; queue[j] j++; J#?`l,
if (queue[k]>queue[j]) file://不用交换 *'cyFu$
break; jwL\|B oE
SortUtil.swap(queue,j,k); E[ttamU
k = j; HO_!/4hrU
} egmNX't6f5
} yZV Y3<]
private void fixUp(int k) { r"|UgCc
while (k > 1) { 5AbY 59
int j = k >> 1; XiMd|D
if (queue[j]>queue[k]) Q?2GwN
break; 8-"D.b4
SortUtil.swap(queue,j,k); ]~:WGo=_
k = j; a@S{A5j
} Kw7uUJR
} [G",Yky
3;JF5e\?x
} .TM. v5B
%M,^)lRP
} 6z5wFzJv?q
F};T<#
SortUtil： P84=.*>
%-KgR
package org.rut.util.algorithm; w `nm}4M
T'ei>]y]
import org.rut.util.algorithm.support.BubbleSort; TD sjNFe3
import org.rut.util.algorithm.support.HeapSort; [XhG7Ly
import org.rut.util.algorithm.support.ImprovedMergeSort; 60G(jO14
import org.rut.util.algorithm.support.ImprovedQuickSort; cTBUj
import org.rut.util.algorithm.support.InsertSort; tR\cS)
import org.rut.util.algorithm.support.MergeSort; ZmDM=qN
import org.rut.util.algorithm.support.QuickSort; D(WdI
import org.rut.util.algorithm.support.SelectionSort; 9~J#> C0}
import org.rut.util.algorithm.support.ShellSort; N9#5 P!
J9/EJ'My
/** Urz9S3#\
* @author treeroot < V*/1{
* @since 2006-2-2 Y?6}r;<
* @version 1.0 ^;sE)L6
*/ ;efF]")
public class SortUtil { xpJ=yxO
public final static int INSERT = 1; m al?3*x/
public final static int BUBBLE = 2; H]}mg='kI
public final static int SELECTION = 3; mX%T"_^
public final static int SHELL = 4; pr[V*C/
public final static int QUICK = 5; JM7FVB
public final static int IMPROVED_QUICK = 6; {DD #&B
public final static int MERGE = 7; "%YVAaN
public final static int IMPROVED_MERGE = 8; kX2Z@ w`
public final static int HEAP = 9; yAFt|<
;\(LovUy6
public static void sort(int[] data) { CofTTYl
sort(data, IMPROVED_QUICK); 3a[LM!
} dZY|6
private static String[] name={ rJ{k1H>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z,DSTP\|
}; 8!{ }WLwb
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private static Sort[] impl=new Sort[]{ h[;DRD!Z
new InsertSort(), '0=mV"#H{
new BubbleSort(), Y!`pF
new SelectionSort(), jwg*\HO,s
new ShellSort(), 6!HYx
new QuickSort(), -,+~W#n
new ImprovedQuickSort(), EiDnUL(W7h
new MergeSort(), Ng2Z7k
new ImprovedMergeSort(), XmP,3KG2{S
new HeapSort() h1)ny1;
}; -zUBK
HV'M31m~q
public static String toString(int algorithm){ g~2=he\C
return name[algorithm-1]; ma xpR>7`j
} J/QqwoR
2tg07
public static void sort(int[] data, int algorithm) { QnJLTBv
impl[algorithm-1].sort(data); kRr/x-"
} eE_$ADEf
O6,2M[a
public static interface Sort { _kc}:
public void sort(int[] data); &7,::$cu
} [Op^l%BC
ILx4[m7
public static void swap(int[] data, int i, int j) { )%b 5uZ
int temp = data; Vry*=X&Q
data = data[j]; [&IcIZ
data[j] = temp; (+6N)9rj`/
} #Cx#U"~G`
} Z^BZH/I?