[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; xp}M5|
} 24u_}ZQzY
int i1=l; NFyKTA6
int i2=mid+1; Xe&p.v
for(int cur=l;cur<=r;cur++){ L1Jn@
if(i1==mid+1) ~jzjJ&O&
data[cur]=temp[i2++]; 5z&>NI
else if(i2>r) >a&IFi,j
data[cur]=temp[i1++]; )-X/"d
else if(temp[i1] data[cur]=temp[i1++]; /0o#V-E)
else adPd}rt;
data[cur]=temp[i2++]; &M:o(T
} Y]tbwOle
} e/&^~ $h
_+X-D9j(l
} Y?3f Fg
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改进后的归并排序: v-BQ>-&s
md,KRE
package org.rut.util.algorithm.support; d^f rKPB
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import org.rut.util.algorithm.SortUtil; Gt+rVJ=v
S9{A}+"K
/** ]6F\a= J
* @author treeroot P)cEYk
* @since 2006-2-2 )xiu \rC
* @version 1.0 `ZbFky{
*/ G:3szz
public class ImprovedMergeSort implements SortUtil.Sort { RD46@Q`
91]sO%3
private static final int THRESHOLD = 10; >ZW|wpO
|B^Mj57DO
/* [(gXjt-
* (non-Javadoc) 0zE@?.
* Bhv$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~d].<Be
*/ lj UdsUw
public void sort(int[] data) { tJybR"NQ
int[] temp=new int[data.length]; %~y>9K
mergeSort(data,temp,0,data.length-1); v+I-*,R
} yYaoA/0
Mc<u?H
private void mergeSort(int[] data, int[] temp, int l, int r) { {}$Zff
int i, j, k; .r2*tB).
int mid = (l + r) / 2; 6JDaZh"=K
if (l == r) (0B?OkQ
return; yIrJaS-
if ((mid - l) >= THRESHOLD) IvT><8<G
mergeSort(data, temp, l, mid); 6pSi-FH
else #c5jCy}n
insertSort(data, l, mid - l + 1); B6Eu."T
if ((r - mid) > THRESHOLD) p[(I5p:L
mergeSort(data, temp, mid + 1, r); OQ7 `n<I<)
else pF4Z4?W
insertSort(data, mid + 1, r - mid); d&[RfZ`
D:;idUO
for (i = l; i <= mid; i++) { Rd&DH_<+^
temp = data; *<\K-NSL
} s4~[GO6>
for (j = 1; j <= r - mid; j++) { 'gvR?[!t
temp[r - j + 1] = data[j + mid]; 3iIy_nWC
} C+llA
int a = temp[l]; XzHR^^;u"*
int b = temp[r]; =29IHL3
for (i = l, j = r, k = l; k <= r; k++) { 8 {V9)U
if (a < b) { Y.\x.Hg
data[k] = temp[i++]; ;~EQS.Qp
a = temp; PDuc;RG
} else { )63 $,y-;$
data[k] = temp[j--]; %'yrIR
b = temp[j]; d=PX}o^
} !g9k9 l
} p 1'l D
} R7kkth
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/** ch8a
* @param data z*EV>Y[
* @param l ~w+I2oS$
* @param i Q$c6l[(g
*/ -2M~KlYl
private void insertSort(int[] data, int start, int len) { (Jk&U8y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @kWL "yy,
} ?vFy3
} #wI}93E
} WVdV:vJ-
} "XR=P> xk
u^~7[OkE
堆排序： OG/b5U
QQM:[1;RT
package org.rut.util.algorithm.support; q 84*5-
1f`De`zXzr
import org.rut.util.algorithm.SortUtil; 9 {&g.+
jYHnJ}<
/** *an Ng<@
* @author treeroot H<(F$7Q!\
* @since 2006-2-2 cb|+6m~
* @version 1.0 {A/r)
*/ ; oyV8P$
public class HeapSort implements SortUtil.Sort{ hOY@vm&
b=,BLe\
/* (non-Javadoc) Alxf;[s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]n!V
*/ IZ=Z=k{
public void sort(int[] data) { ppyy0E^M
MaxHeap h=new MaxHeap(); i]v3CY|3AI
h.init(data); c/|{yp$Ga>
for(int i=0;i h.remove(); x>yqEdR=o
System.arraycopy(h.queue,1,data,0,data.length); oY)eN?c
} n<.7tr0f\
Q@VA@N=w
private static class MaxHeap{ b`jR("U
)|~&(+Q?]
void init(int[] data){ B\J[O5},
this.queue=new int[data.length+1]; A{+/$7vek
for(int i=0;i queue[++size]=data; J,=K1>8s
fixUp(size); /Q1 b%C
} \p4*Q}t
} X+4Uh I
C4mkt2Eb0a
private int size=0; SZWNN#w60?
q"VmuQ
private int[] queue; 9q`Ewj R
7{#p'.nc5
public int get() { Hn/t'D3
return queue[1]; >z<L60S
} ug9Ja)1|
F*k =JL
public void remove() { 1)z'-dQ-5$
SortUtil.swap(queue,1,size--); 56pj(}eq
fixDown(1); PaTOlHr
} (JbRhcg
file://fixdown 6s@!Yn|?
private void fixDown(int k) { )z7CT|h7S
int j; 7!M; ?Y
while ((j = k << 1) <= size) { O60T.MM`
if (j < size %26amp;%26amp; queue[j] j++; *d8 %FQ
if (queue[k]>queue[j]) file://不用交换 02]HwsvZ
break; D[>:az`
SortUtil.swap(queue,j,k); L'wR$
k = j; ui?@:=
} ) gl{ x
} ,LBj$U]e|E
private void fixUp(int k) { w"v96%"Y
while (k > 1) { /[/L%;a'p
int j = k >> 1; "-:H$
if (queue[j]>queue[k]) K"l~bFCZ8
break; PcsYy]Q/
SortUtil.swap(queue,j,k); -o/Vp>_UOE
k = j; v}!lx)#
} %qV:h#
} myo4`oH
@kSfF[4H
} 2z;nPup,
i6bUJtL
} -']Idn6
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SortUtil： %0&,_jM/9
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package org.rut.util.algorithm; z&9ljQ iF
~JRq :
import org.rut.util.algorithm.support.BubbleSort; Wt%Wpb8
import org.rut.util.algorithm.support.HeapSort; rX^uHq8
import org.rut.util.algorithm.support.ImprovedMergeSort; I*3>>VN
import org.rut.util.algorithm.support.ImprovedQuickSort; *lDVV,T'}w
import org.rut.util.algorithm.support.InsertSort; GN(,`y
import org.rut.util.algorithm.support.MergeSort; P:Q&lnC
import org.rut.util.algorithm.support.QuickSort; hcW>R
import org.rut.util.algorithm.support.SelectionSort; 9<&*iIrM
import org.rut.util.algorithm.support.ShellSort; ~APS_iG[
_k}Qe;
/** |Fx *,91
* @author treeroot # a4OtRiI
* @since 2006-2-2 n"?*"Ya
* @version 1.0 a?ete9Q+
*/ %V1jM
public class SortUtil { +b_[JP2
public final static int INSERT = 1; o]I8Ghk>/z
public final static int BUBBLE = 2; NVQ.;"2w
public final static int SELECTION = 3; Fsl="RB7f
public final static int SHELL = 4; %$Fe[#1
public final static int QUICK = 5; ES^JRX
public final static int IMPROVED_QUICK = 6; K/(QR_@?
public final static int MERGE = 7; "([gN:
public final static int IMPROVED_MERGE = 8; Xn~\Vb
public final static int HEAP = 9; 8mOGEx
gKQs:25
public static void sort(int[] data) { GwA\>qXw
sort(data, IMPROVED_QUICK); ?x 0gI
} [CI0N I6F
private static String[] name={ Ttl m&d+C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l['p^-I
}; mcidA%
@ G!Ir"Q
private static Sort[] impl=new Sort[]{ {2Ew^Li
new InsertSort(), |Y6;8e`H
new BubbleSort(), ue?3;BF 5
new SelectionSort(), `<P:ly.
new ShellSort(), qnQ".
new QuickSort(), __+8wC
new ImprovedQuickSort(), L%3Bp/`S
new MergeSort(), G$KQgUN~[
new ImprovedMergeSort(), Xf"< >M
new HeapSort() +*`kJ)uP
}; ~xDu2-5
j[mII5e7g
public static String toString(int algorithm){ Gj%q:[r
return name[algorithm-1]; Qc!3y>Y=_
} h-O;5.m-P
Q`.q,T8I
public static void sort(int[] data, int algorithm) { T~L V\}h
impl[algorithm-1].sort(data); zN;P_@U
} Zv@ Fr9m
NX8hFwR
public static interface Sort { N(yd<Mw
public void sort(int[] data); ZNDi;6e
} 5}_=q;sZ
<}'=@a
public static void swap(int[] data, int i, int j) { :x5O1Zn/t
int temp = data; f[R~oc5P0
data = data[j]; An`*![
data[j] = temp; Qm*ZOz'i
} d-m.aP)y:
} ]91QZ~4a