[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; G_5sF|(mq
} v,vTRrpK
int i1=l; Y=X"YH|
int i2=mid+1; t^?8Di\
for(int cur=l;cur<=r;cur++){ 1hZM))
if(i1==mid+1) ~m!>e])P?X
data[cur]=temp[i2++]; V.WfP*~NJ
else if(i2>r) q^sMJ
data[cur]=temp[i1++]; 7tAWPSwf
else if(temp[i1] data[cur]=temp[i1++]; x+B~t4A
else )I]E%ut{4,
data[cur]=temp[i2++]; T.ub!,Y
} #BS]wj2#
} m?<8 ':
JoW*)3Z
} _WK+BxH
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改进后的归并排序: u4VQx,,
6?*iIA$b
package org.rut.util.algorithm.support; k6JB%m\E
%>I!mD"X\
import org.rut.util.algorithm.SortUtil; IX7d[nm39
1)_f9GR
/** I-/PzL<W P
* @author treeroot W\.f:"2qr
* @since 2006-2-2 }"m@~kg=
* @version 1.0 "]c:V4S#`A
*/ jLr8?Hyf
public class ImprovedMergeSort implements SortUtil.Sort { >qtB27jV
4n3QW%#
private static final int THRESHOLD = 10; {w!}:8p
eBU\&z[
/* 1<\cMY6
* (non-Javadoc) z*yN*M6t
* P]Gsc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ](MXP,R
*/ R$6Y\ *L[
public void sort(int[] data) { ] {NY;|&I'
int[] temp=new int[data.length]; Ix:aHl
mergeSort(data,temp,0,data.length-1); 1MB
} u x:,io
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private void mergeSort(int[] data, int[] temp, int l, int r) { (3]7[h7
int i, j, k; Q|5wz]!5Y(
int mid = (l + r) / 2; |:!0`p{R
if (l == r) Z?nMt
return; _"WQi}Mm
if ((mid - l) >= THRESHOLD) I*lq0&
mergeSort(data, temp, l, mid); {+C>^b
else 9,y&?GLP
insertSort(data, l, mid - l + 1); dDpe$N
if ((r - mid) > THRESHOLD) m@zxjIwT
mergeSort(data, temp, mid + 1, r); W:5m8aE\
else +!_^MBkk
insertSort(data, mid + 1, r - mid); sp_(j!]jX
"r"Y9KODm
for (i = l; i <= mid; i++) { <EBp X
temp = data; GuDus2#+
} -CL7^
for (j = 1; j <= r - mid; j++) { Q;aZpi-E"
temp[r - j + 1] = data[j + mid]; 3Ji,n;QLm
} ;OdUH
int a = temp[l]; @L0wd>
int b = temp[r]; vxqMo9T
for (i = l, j = r, k = l; k <= r; k++) { ,%KB\;1mn'
if (a < b) { ,Y`C7Px
data[k] = temp[i++]; {qx"/;3V
a = temp; w:umr#
} else { DJ<c
data[k] = temp[j--]; `E|IMUB~
b = temp[j]; <c\aZ9+V
} U3za}3
} jM7}LV1Ck
} Xp{gh@#dr
@8CD@SDv
/** mB1)!
* @param data }XXE hOO
* @param l _OrE{
* @param i T.(SBP
*/ W:) M}}&H
private void insertSort(int[] data, int start, int len) { Z2$-},i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Uc6U!X
} &pmJ:WO,h
} >Y\4v}-
} ;ib~c,
} ?&X6VNbU
GB !3Z
堆排序： lhjPS!A~
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package org.rut.util.algorithm.support; tjTF?>^6|
Awr]@%I
import org.rut.util.algorithm.SortUtil; ?.Kl/8ml
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/** I+<;Dsp
* @author treeroot 4B> l|%
* @since 2006-2-2 .9ROa#7U;n
* @version 1.0 "Km`B1f`
*/ un/eS-IIh
public class HeapSort implements SortUtil.Sort{ Ec[:6}
$`5DGy?RU
/* (non-Javadoc) tou^p-)GQ|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x[?_F
*/ <B fwR$
public void sort(int[] data) { `C()H@;
MaxHeap h=new MaxHeap(); o _CVZ
h.init(data); zH_q6@4
for(int i=0;i h.remove(); ^Uf`w7"iY
System.arraycopy(h.queue,1,data,0,data.length); \.{JS>!
} 81n%2G
:#LB}=HQ
private static class MaxHeap{ :{AN@zC0\
8jZYy!
void init(int[] data){ MVj@0W33m
this.queue=new int[data.length+1]; QxkfP%_g
for(int i=0;i queue[++size]=data; 8%NX)hZyq}
fixUp(size); F+6ZD5/
} j[HKC0C6
} L fi]s
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private int size=0; d-*9tit
V4"AFArI
private int[] queue; lAGxE-B^a"
Kzm_AHA)
public int get() { f&`*x t/
return queue[1]; `SG70/
} =MXF`k^}
^U =`Rx
public void remove() { [0}471
SortUtil.swap(queue,1,size--); 0g+@WK6y
fixDown(1); OBZ|W**N"
} V?"^Ff3m!
file://fixdown d!d 3r W;A
private void fixDown(int k) { a_ P[J8j
int j; %pt$S~j
while ((j = k << 1) <= size) { S ~_%
if (j < size %26amp;%26amp; queue[j] j++; 7Y)wu$!7}
if (queue[k]>queue[j]) file://不用交换 -3V~YhG
break; cC[n~OV
SortUtil.swap(queue,j,k); `~RV
k = j; 7mjj%
} <Hp"ZCN
} y(R*Z^c}d,
private void fixUp(int k) { gB"Tc[l1
while (k > 1) { zbR.Lb
int j = k >> 1; 98]t"ny [
if (queue[j]>queue[k]) EzyIsp> _
break; PYUY bRn
SortUtil.swap(queue,j,k); $O>@(K
k = j; oL@ou{iQ
} ;!}SgzSH}
} :2My|3H\
'k67$H
} =tNiIU
8?YW i
} OgS8.wX
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SortUtil： WK}+f4tdW[
wUeOD.;#F
package org.rut.util.algorithm; <`3(i\-X
(3h*sd5ly
import org.rut.util.algorithm.support.BubbleSort; DxgT]F%
import org.rut.util.algorithm.support.HeapSort; B|=maz:_
import org.rut.util.algorithm.support.ImprovedMergeSort; KUutC :
import org.rut.util.algorithm.support.ImprovedQuickSort; 0_ \ g
import org.rut.util.algorithm.support.InsertSort; =.oWguzu
import org.rut.util.algorithm.support.MergeSort; RG3G},Q
import org.rut.util.algorithm.support.QuickSort; X@&uu0JJ
import org.rut.util.algorithm.support.SelectionSort; 9u@h`
import org.rut.util.algorithm.support.ShellSort; ->&VbR)
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/** $tHwJ!<$&
* @author treeroot J_|}Xd)~t6
* @since 2006-2-2 Vk_&W.~
* @version 1.0 &i^NStqu
*/ &n.uNe
public class SortUtil { ]~Vu-@ /}
public final static int INSERT = 1; SWsv,
public final static int BUBBLE = 2; 0r ; nz]'
public final static int SELECTION = 3; p}DF$k%`
public final static int SHELL = 4; 51opP8
public final static int QUICK = 5; <`_OpNxqW
public final static int IMPROVED_QUICK = 6; @1&;R
public final static int MERGE = 7; N8YBu/
public final static int IMPROVED_MERGE = 8; kr`BUW3
public final static int HEAP = 9; *-AAQ
? < O
public static void sort(int[] data) { F2`htM@,
sort(data, IMPROVED_QUICK); XQJ^)d00h
} zO5u{
private static String[] name={ _#D\*0J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @Du}
}; <S8W~wC
x~9z`d{!
private static Sort[] impl=new Sort[]{ TflS@Z7C
new InsertSort(), 9X$#x90
new BubbleSort(), EcU'*
new SelectionSort(), tkN3BQ
new ShellSort(), ow+Dd[i
new QuickSort(), q$?7 ~*M;x
new ImprovedQuickSort(), hHc^ZA
new MergeSort(), y+";
new ImprovedMergeSort(), .eabtGO,
new HeapSort() W-!Bl&jF[
}; h lkvk]v
[%84L@:h
public static String toString(int algorithm){ Wz-3?EQ
return name[algorithm-1]; ,t%\0[{/B
} 9]L!.
g|._n
public static void sort(int[] data, int algorithm) { EID)o[<
impl[algorithm-1].sort(data); 5hJYy`h~
} ,%?; \?b%h
+% XhQ
public static interface Sort { DN"S,
public void sort(int[] data); rv,NQZ
} f3zfRhkIk
5BU%%fBJ.
public static void swap(int[] data, int i, int j) { [%7;f|p?
int temp = data; GX7 eRqz>
data = data[j]; )l#%.Z9
data[j] = temp; N753
} obAs<nk
} g[EM]q,