[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; S zqY@
} PNn-@=%
int i1=l; 4R8W ot
int i2=mid+1; B^{87YR
for(int cur=l;cur<=r;cur++){ +0)zB;~7
if(i1==mid+1) w =MZi=p
data[cur]=temp[i2++]; R3`Rrj Z
else if(i2>r) `%a+LU2
data[cur]=temp[i1++]; \Gzo^w
else if(temp[i1] data[cur]=temp[i1++]; Gb?O-z%8*
else ww0m1FzX
data[cur]=temp[i2++]; ^Ko{#qbl/
} >mWu+Nn:
} BAUo`el5
(l~3~n
} ;:0gN|+
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改进后的归并排序: q/|WkV `m
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package org.rut.util.algorithm.support; XyM?Dc5,
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import org.rut.util.algorithm.SortUtil; C/sDyv$
^KK9T5H
/** 8N58w)%7`
* @author treeroot HDTdOG)
* @since 2006-2-2 g;M\4o
* @version 1.0 *`(/wE2v]
*/ =z]8;<=pL
public class ImprovedMergeSort implements SortUtil.Sort { JW`Kh*,~<
4 Ii@_r>
private static final int THRESHOLD = 10; ]0g%)fuMf
|H(Mmqgk
/* [;]@PKW?w
* (non-Javadoc) JN{xh0*
* ' YONRha
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tFYIKiq2
*/ N]p|c3D
public void sort(int[] data) { <;?&<qMo,P
int[] temp=new int[data.length]; aD5G0d?u
mergeSort(data,temp,0,data.length-1); N%2UL&w#B
} Ya_4[vR<
[xVE0l*\
private void mergeSort(int[] data, int[] temp, int l, int r) { ;7F|g
int i, j, k; H$ sNp\[{
int mid = (l + r) / 2; !iOuIYjV
if (l == r) ]:Q7Gys
return; d\cwUXf J
if ((mid - l) >= THRESHOLD) ,0~/ Cn
mergeSort(data, temp, l, mid); fGv`.T_d
else ItoSORVV
insertSort(data, l, mid - l + 1); HxVQeyOR
if ((r - mid) > THRESHOLD) })l+-H"
mergeSort(data, temp, mid + 1, r); yk5T"#'+
else }UzO_&Z#6
insertSort(data, mid + 1, r - mid); <IF\;,.c
jZ'y_
for (i = l; i <= mid; i++) { <N{pMz
temp = data; iZ`1Dzxgk
} zn |=Q$81
for (j = 1; j <= r - mid; j++) { C+WHg-l
temp[r - j + 1] = data[j + mid]; ; md{T'
} 9u'hCi(
int a = temp[l]; IXSCYqoK
int b = temp[r]; GMw|@?:{
for (i = l, j = r, k = l; k <= r; k++) { S*H :/Ip
if (a < b) { bW`@9 =E
data[k] = temp[i++]; [xXml On!
a = temp; \w 6%J77
} else { !(!BW9Zt+
data[k] = temp[j--]; 6]|NB&
b = temp[j]; V.IgEE]
} ,x+_/kqx
} ax0:v!,e
} |U_48
S|A?z)I
/** %@!Vx
* @param data HY]vaA`
* @param l 5k`[a93T
* @param i F_SkS?dB
*/ tVhY=X{N?
private void insertSort(int[] data, int start, int len) { OpwZTy}1}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t[6g9e$
} ;+-$=l3[a
} ]|q\^k)JU
} 6'Sc=;;:
} Po[u6K2&
tUmI#.v
堆排序： b8J\Lm|J
`>fN?He
package org.rut.util.algorithm.support; JlsRP
kWfNgu$xK
import org.rut.util.algorithm.SortUtil; t|*PC
?4 `K8
/** @j$tpz
* @author treeroot S,5>g07-`
* @since 2006-2-2 ^uW!=%D
* @version 1.0 qYFol#=%
*/ GLb}_-|
public class HeapSort implements SortUtil.Sort{ ;G.m;5A
g<s[6yA
/* (non-Javadoc) y(:hN)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sBIqee'T
*/ 0EM`,?i .Q
public void sort(int[] data) { <69/ZI),Y{
MaxHeap h=new MaxHeap(); /KEPPp
h.init(data); Tk-PCra
for(int i=0;i h.remove(); ?lb1K'(
System.arraycopy(h.queue,1,data,0,data.length); Gvt.m&_
} *seKph+'c
KQ/v](77
private static class MaxHeap{ *DX6m
Y*``C):K%
void init(int[] data){ wLD/#Hfi7
this.queue=new int[data.length+1]; [;VNuF
for(int i=0;i queue[++size]=data; (ju-r*0
fixUp(size); RR:m<9l
} [pbX_
} T\:3(+uK
=&,zWNz)
private int size=0; =~Jv*c
zQ {g~x
private int[] queue; GI$t8{M
',0~\V
public int get() { ;T6^cS{Gj
return queue[1]; v,RLN`CID
} 2 c'=^0:
@yaBtZUp3
public void remove() { +[r%y,k
SortUtil.swap(queue,1,size--); tGzYO/Zp
fixDown(1); d{0w4_x
} %H-[u}s
file://fixdown *|Re,cY
private void fixDown(int k) { UhY )rezh
int j; 2 <&-
while ((j = k << 1) <= size) { q4 'x'8
if (j < size %26amp;%26amp; queue[j] j++; |Xd[%W)
if (queue[k]>queue[j]) file://不用交换 z$-/yT"M
break; ,I=ClmR
SortUtil.swap(queue,j,k); $X9Ban]
k = j; (k M\R|
} Xr M[8a
} KLqu[{y.'
private void fixUp(int k) { ;sNyN#
while (k > 1) { _dsd{&
int j = k >> 1; @V] Wm1g
if (queue[j]>queue[k]) +M@G 8l
break; m[oe$yH
SortUtil.swap(queue,j,k); _89 _*t(
k = j; $7)O&T*q'
} ER5Q` H
} S M987Y!B
VR_+/,~
} 7^KQQ([
6FSw_[)
} .2 UUU\/5
2k"a%#H8
SortUtil： /~7H<^}
:c)<B@NqNo
package org.rut.util.algorithm; 30>TxL=&
FEaf&'G]
import org.rut.util.algorithm.support.BubbleSort; <4{@g]0RV
import org.rut.util.algorithm.support.HeapSort; '[Oi_gE.
import org.rut.util.algorithm.support.ImprovedMergeSort; AXPUJ?V
import org.rut.util.algorithm.support.ImprovedQuickSort; qvYYKu
import org.rut.util.algorithm.support.InsertSort; 7L;yN..0
import org.rut.util.algorithm.support.MergeSort; ~uC4>+dk
import org.rut.util.algorithm.support.QuickSort; /l+x&xYD
import org.rut.util.algorithm.support.SelectionSort; j\dkv_L
import org.rut.util.algorithm.support.ShellSort; M|d[iaM,
8)"KPr63M
/** YhLtf(r
* @author treeroot 6{lWUr
* @since 2006-2-2 gSR&CnqZ<
* @version 1.0 dhK$XG
*/ pJa FPO..|
public class SortUtil { &%qD Som3
public final static int INSERT = 1; )r?i^D&4
public final static int BUBBLE = 2; \U !<-
public final static int SELECTION = 3; 4N$svA
public final static int SHELL = 4; .[2MPjg
public final static int QUICK = 5; f[.hN
public final static int IMPROVED_QUICK = 6; W]2;5`MM
public final static int MERGE = 7; a' #-%!]
public final static int IMPROVED_MERGE = 8; Q(]-\L'
public final static int HEAP = 9; &1Cq+YpI
d'[aOH4}
public static void sort(int[] data) { 0E\R\KO$>
sort(data, IMPROVED_QUICK); D<++6HN&#
} f!LZT!y
private static String[] name={ crgYr$@s?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [b#jw,7
}; b1[U9
5)$U<^uy
private static Sort[] impl=new Sort[]{ /=e[(5X|O
new InsertSort(), {]D!@87
new BubbleSort(), ziH2<@
new SelectionSort(), k}lx!Ck
new ShellSort(), Z7.)[ ;
new QuickSort(), R@VO3zsW
new ImprovedQuickSort(), 8!UZ..
new MergeSort(), z%Z}vWn
new ImprovedMergeSort(), &g& &-=7)
new HeapSort() =l7LEkR
}; sM5 w~R>Y
^G2vA8%
public static String toString(int algorithm){ 3lL:vD5(
return name[algorithm-1]; M0]l!x#7
} "BFW&<1
'|XP}V0I
public static void sort(int[] data, int algorithm) { e/Q[%y.X
impl[algorithm-1].sort(data); Uw&+zJ
} <q[*kr
'E&K%/d
public static interface Sort { ~:t2@z4p
public void sort(int[] data); p\-.DRwT`
} oC7#6W:@w
_ZS<zQ'
public static void swap(int[] data, int i, int j) { t9`NCng 5
int temp = data; }SN'*w@E
data = data[j]; 1MahFeQ[
data[j] = temp; 0x`:jz`
} \3LD^[qi
} qyJpm{