[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; *sc0,'0
} wzNt c)~i
int i1=l; Q70**qm
int i2=mid+1; =\ti<
for(int cur=l;cur<=r;cur++){ "6I-]:K-
if(i1==mid+1) P-E'cb%ub
data[cur]=temp[i2++]; h-?q6O/|
else if(i2>r) 0I(GB;E
data[cur]=temp[i1++]; oP|pOs\$p
else if(temp[i1] data[cur]=temp[i1++]; -7Aw s)
else a0V8L+v(
data[cur]=temp[i2++]; DWm;&RPJ
} Pv{,aV\I}
} Z?.p%*>`T=
*6sJ*lh
} ch)Ps2i
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改进后的归并排序: 6*(h9!_T1
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package org.rut.util.algorithm.support; 3zA8pI w
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import org.rut.util.algorithm.SortUtil; B>p0FQ.
^H\-3/si*
/** aowPji$H
* @author treeroot W[1f]w3
* @since 2006-2-2 PtPGi^
* @version 1.0 (N~zJ.o
*/ 8Y{}p[UFT
public class ImprovedMergeSort implements SortUtil.Sort { 0bnVIG2q
C%95~\Ds
private static final int THRESHOLD = 10; +}`O^#<qLX
<QkN}+B=
/* V~]'+A q>
* (non-Javadoc) n&3iv^
* Gw\G+T?M-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'sjJSc
*/ =7J|KoKK
public void sort(int[] data) { :C|>y4U&(s
int[] temp=new int[data.length]; g'}`FvADi
mergeSort(data,temp,0,data.length-1); u]]5p[|S
} [)J49
)]>i>
private void mergeSort(int[] data, int[] temp, int l, int r) { o$HJg
int i, j, k; |`94Wj<
int mid = (l + r) / 2; .Kh(F6 s
if (l == r) ok\/5oz
return; ) v[Knp'
if ((mid - l) >= THRESHOLD) sjkKaid
mergeSort(data, temp, l, mid); 02# b:
else FB=
insertSort(data, l, mid - l + 1); ^qId]s
if ((r - mid) > THRESHOLD) qV,$bw
mergeSort(data, temp, mid + 1, r); y 8d`},
else ku[=QsMv
insertSort(data, mid + 1, r - mid); k^dCX+
?{.b9`
for (i = l; i <= mid; i++) { 8x^H<y=O
temp = data; mtWx ?x
} v_@#hf3
for (j = 1; j <= r - mid; j++) { ?%za:{
temp[r - j + 1] = data[j + mid]; r"u(!~R
} 'Qs3
int a = temp[l]; 2=/g~rp*
int b = temp[r]; tO+%b=Z^
for (i = l, j = r, k = l; k <= r; k++) { 8O.:3%D~ t
if (a < b) { 21/a3Mlx#
data[k] = temp[i++]; GdfKxSO
a = temp; 'De'(I
} else { m[xf./@f{
data[k] = temp[j--]; u>Axq3F
b = temp[j]; -B3wRAEt
} 9i2vWSga
} C_^R_
} 7AtXG^lK
#Zavdkw=d
/** /4-eoTxy
* @param data c@o/Cv
* @param l /P8eI3R
* @param i G$x["
*/ 4}_w4@(
private void insertSort(int[] data, int start, int len) { H'= i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ">D(+ xr!)
} |Qt`p@W
} O'& \-j 1
} 1(;33),P8
} YI),q.3X~
9 <kkzy
堆排序： %yuIXOJ
b1>$sPJ+
package org.rut.util.algorithm.support; 4qSS<SqY
qYu!:xa8
import org.rut.util.algorithm.SortUtil; C@?e`=9(
%`T^qh_dE
/** seD+~Y\z
* @author treeroot xX4^nem\G
* @since 2006-2-2 'xrbg]b%
* @version 1.0 IwgAA)H
*/ milK3+N
public class HeapSort implements SortUtil.Sort{ wmcp`8w.
rW%'M#! =
/* (non-Javadoc) ~tj7zI6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P2:Q+j:PX
*/ X"khuyT_
public void sort(int[] data) { 8JFkeU%yO
MaxHeap h=new MaxHeap(); J>|:T
h.init(data); f?<M3P
for(int i=0;i h.remove(); $E~Lu$|
System.arraycopy(h.queue,1,data,0,data.length); CL}I:/zRB
} n$![b_)*
DwrCysIK
private static class MaxHeap{ 'm!11Phe
x]J-q5
void init(int[] data){ &\]f!'jV
this.queue=new int[data.length+1]; C^42=?
for(int i=0;i queue[++size]=data; /h.3<HI."*
fixUp(size); VX>t!JP p
} Z%n.:I<%ZV
} D>x'3WYR
LYq2A,wm$
private int size=0; (PrPH/$
$Q$d\Yvi
private int[] queue; vLT12v:)`
fm:{&(
public int get() { zUgkY`]:BJ
return queue[1]; G-i_s6Wu
} a5~C:EU0
.idl@%
public void remove() { 4!s k3Cw{
SortUtil.swap(queue,1,size--); e"H+sM26-
fixDown(1); {)[g
} Umwg iw
file://fixdown ;o@`l$O
private void fixDown(int k) { H=BR -
int j; j83Y'VJJC
while ((j = k << 1) <= size) { =$zr t
if (j < size %26amp;%26amp; queue[j] j++; A`/7>'k/q[
if (queue[k]>queue[j]) file://不用交换 BMj&*p8R
break; >E,L"&_j
SortUtil.swap(queue,j,k); BHE =Zo
k = j; np>!lF:
} KeOBbe
} U)%u`C0
private void fixUp(int k) { HY|SLk/E
while (k > 1) { ,Y5 4(>>%
int j = k >> 1; #<>E+r+
if (queue[j]>queue[k]) ~t3?er& R
break; ,H(vD,54g
SortUtil.swap(queue,j,k); n2hsG.4
k = j; k'q !MZU
} 9C~GL,uKs
} n *0F
o%>nu
} nMoF;AdKm
Oc+L^}elJ
} 4_:e+ ql
td$6:)
SortUtil： xENA:j?kF
44{:UhJkx
package org.rut.util.algorithm; 3K:Xxkk
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import org.rut.util.algorithm.support.BubbleSort; 8A]q!To
import org.rut.util.algorithm.support.HeapSort; ;B7|tajd
import org.rut.util.algorithm.support.ImprovedMergeSort; G8-d%O p
import org.rut.util.algorithm.support.ImprovedQuickSort; %LlKi5u]
import org.rut.util.algorithm.support.InsertSort; E :gArQ
import org.rut.util.algorithm.support.MergeSort; ;RZa<2
import org.rut.util.algorithm.support.QuickSort; ^a5~FI:
import org.rut.util.algorithm.support.SelectionSort; J 2~B<=V
import org.rut.util.algorithm.support.ShellSort; l+X^x%EA
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/** a#GqJ?nY
* @author treeroot (xJBN?NRO
* @since 2006-2-2 "MP{z~Mmj
* @version 1.0 \`9|~!,Ix7
*/ { 3P!b|V>
public class SortUtil { 9JeGjkG,
public final static int INSERT = 1; }4`YdN
public final static int BUBBLE = 2; xT(.#9
public final static int SELECTION = 3; GuDD7~qxY
public final static int SHELL = 4; }33Au-%*
public final static int QUICK = 5; .%h_W\M<l
public final static int IMPROVED_QUICK = 6; U]&%EqLS
public final static int MERGE = 7; -*j;
public final static int IMPROVED_MERGE = 8; BeCr){,3
public final static int HEAP = 9; ]= D
*4\ub:9
public static void sort(int[] data) { #!j&L6
sort(data, IMPROVED_QUICK); .kDCcnm
} ]V\g$@
private static String[] name={ 52Ffle8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $}o,7xAn
}; r 24]2A
[o6<aE-
private static Sort[] impl=new Sort[]{ @d9*<>@:
new InsertSort(), C>-"*Lt
new BubbleSort(), &G,v*5N8$K
new SelectionSort(), L7'n<$F
new ShellSort(), KiHAm|,
new QuickSort(), 7cQw?C
new ImprovedQuickSort(), ht!:e>z&4
new MergeSort(), 1fG@r%4
new ImprovedMergeSort(), uB!P>v6
new HeapSort() O4URr
}; t)b>f~
:P'5_YSi
public static String toString(int algorithm){ IiU|@f~k
return name[algorithm-1]; $S=OmdgR
} cv&hT.1
z`6KX93
public static void sort(int[] data, int algorithm) { xBd%e-r
impl[algorithm-1].sort(data); 7P(:!ce4-
} 1O{67Pf
RT9|E80
public static interface Sort { 16{;24
public void sort(int[] data); c9K\K~bk
} @XJv9aq
MQI=
public static void swap(int[] data, int i, int j) { u(qpdG||7
int temp = data; Y*Rqgpu $
data = data[j]; hD=D5LYAZ
data[j] = temp; 8 F 1ga15
} !"">'}E1
} 4^A'A.0