[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; \P[Y`LYL
} kBS9tKBWg
int i1=l; q9B$"n
int i2=mid+1; QL(n} {.%
for(int cur=l;cur<=r;cur++){ Lw1Yvtn
if(i1==mid+1) !n`fTK<$
data[cur]=temp[i2++]; 59LG{R2
else if(i2>r) Usvl}{L[
data[cur]=temp[i1++]; d z|or9&
else if(temp[i1] data[cur]=temp[i1++]; 28-RC>,@}
else {$oj.V 4
data[cur]=temp[i2++]; &0d#Y]D4`
} b1cy$I
} 'B|JAi?
?d*z8w
} /l3V3B7
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改进后的归并排序: +L$Xv
8|gIhpO?^
package org.rut.util.algorithm.support; dRYqr}!%n
Zpt\p7WQ
import org.rut.util.algorithm.SortUtil; Cp\6W[2+B
poE0{HOU
/** Dm981t>wL
* @author treeroot 10Q ]67
* @since 2006-2-2 !aUs>1i
* @version 1.0 #mxPw
*/ q])K,)
public class ImprovedMergeSort implements SortUtil.Sort { }{Pp]*I<A
./Xz}<($8
private static final int THRESHOLD = 10; ROI7eU
1C+13LE$U
/* }J}-//[A
* (non-Javadoc) %UrueMEO
* g _9C*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `bq<$e
*/ w7L{_aom
public void sort(int[] data) { b!t0w{^w
int[] temp=new int[data.length]; rI{; IDV
mergeSort(data,temp,0,data.length-1); Z-%\ <zT
} ic:zsuEm
G[PtkPSJ
private void mergeSort(int[] data, int[] temp, int l, int r) { #\{l"-
int i, j, k; 38B2|x
int mid = (l + r) / 2; 4> K42m
if (l == r) &ANf!*<\E
return; b=C*W,Q_#
if ((mid - l) >= THRESHOLD) As&Sq-NWf
mergeSort(data, temp, l, mid); (MM]N=Tw4
else yZY\MB/
insertSort(data, l, mid - l + 1); qz_7%c]K[
if ((r - mid) > THRESHOLD) LBeF&sb6
mergeSort(data, temp, mid + 1, r); )MVz$h{c.]
else Pm6pv;WK
insertSort(data, mid + 1, r - mid); K-)] 1BG
M)Z7k/=<P
for (i = l; i <= mid; i++) { ;fTKfa
temp = data; HQdxL*N%^
} FjHv
for (j = 1; j <= r - mid; j++) { z_$%-6
temp[r - j + 1] = data[j + mid]; Y(ykng
} 3DX*gsx(
int a = temp[l]; ^CYl\.Y@
int b = temp[r]; Qp5VP@t
for (i = l, j = r, k = l; k <= r; k++) { ^LnTOdAE
if (a < b) { B3`5O[6
data[k] = temp[i++]; #lo6c;*m5
a = temp; 0],r0
} else { NG=-NxEcN
data[k] = temp[j--]; :`#d:.@]o@
b = temp[j]; QO:!p5^:
} /{J4:N'B>
} rBzuKQK}J
} rgQOj^xKv^
*8A
/** x;KOqfawv
* @param data Tk[ $5u*,
* @param l 4"(Bu/24
* @param i EWhK0Vej=
*/ 9rX&uP)j^#
private void insertSort(int[] data, int start, int len) { $99n&t$Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oCv.Ln1;Z
} t>RY7C;PuS
} C==hox7b
} M<Ncb
} QVT5}OzMt
@i_FTN
堆排序： ?zMHP#i
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package org.rut.util.algorithm.support; H2 {+)
u~:y\/Y6
import org.rut.util.algorithm.SortUtil; x_}:D *aI
Mj3A5;#
/** h2A <"w
* @author treeroot qA7>vi%
* @since 2006-2-2 k"%~"9
* @version 1.0 2zA4vZkbcw
*/ :pY/-Cgv
public class HeapSort implements SortUtil.Sort{ +o{R _
M/'sl;
/* (non-Javadoc) U}[d_f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wmL'F:UP
*/ UhWNl]Z
public void sort(int[] data) { )EuvRLo{S7
MaxHeap h=new MaxHeap(); HWrO"b*tO
h.init(data); {]!mrAjD
for(int i=0;i h.remove(); e]"W!KcD9
System.arraycopy(h.queue,1,data,0,data.length); Fyx|z'4b
} {4}yKjW%z
pj{`'; :g
private static class MaxHeap{ =ho}oL,ZO
wssRA?9<
void init(int[] data){ n)-$e4u2
this.queue=new int[data.length+1]; {6|G@""O
for(int i=0;i queue[++size]=data; %XDc,AR[
fixUp(size); u%KTNa0
} 'F3f+YD
} aiUY>M#|
TER=*"!
private int size=0; (t K||*u
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private int[] queue; (N6i4 g6
V7Lxfoa4
public int get() { 7kLz[N6Ll
return queue[1]; CyFrb`%
} (Z q/
jD]~ AwRJ
public void remove() { 6I4\q.^qw
SortUtil.swap(queue,1,size--); ]@c+]{
fixDown(1); A RuA<vQ
} Y_IF;V\
file://fixdown r'r%w#=`t
private void fixDown(int k) { jXx<`I+]
int j; Yui3+}Ms
while ((j = k << 1) <= size) { F#Ryu~,"
if (j < size %26amp;%26amp; queue[j] j++; 3{64 @s
if (queue[k]>queue[j]) file://不用交换 {X+3;&@
break; O, wJR
SortUtil.swap(queue,j,k); %P/Jq#FE.
k = j; S(lO(gY
} )p0^zv{
} l`{\"#4
private void fixUp(int k) { =`F(B
while (k > 1) { IB"w&sBy
int j = k >> 1; +F` S>U
if (queue[j]>queue[k]) #e1>H1eU
break; z&)A,ryW0
SortUtil.swap(queue,j,k); OA1uY83"
k = j; T^t# c
} drP=A~?&:
} %QGC8Tz
KnQ*vM*VM
} gQg"j)
t;Sb/3
} ,/%=sux
Su7?;Oh/yI
SortUtil： ~O0 $Suv
L|:`^M+^w
package org.rut.util.algorithm; ZRB)uA)5=
7 :xfPx
import org.rut.util.algorithm.support.BubbleSort; n8 i] z
import org.rut.util.algorithm.support.HeapSort; ay ;S4c/_
import org.rut.util.algorithm.support.ImprovedMergeSort; gMmaK0uhS
import org.rut.util.algorithm.support.ImprovedQuickSort; VcO0sa f`
import org.rut.util.algorithm.support.InsertSort; vn!3l1\+J
import org.rut.util.algorithm.support.MergeSort; g`' !HGY
import org.rut.util.algorithm.support.QuickSort; GqvpA# i
import org.rut.util.algorithm.support.SelectionSort; 9gDkTYkj
import org.rut.util.algorithm.support.ShellSort; 85:=4N%
f!uwzHA`?
/** 4y?n [/M/
* @author treeroot b9J_1Gl]
* @since 2006-2-2 !qh]6%l
* @version 1.0 wj^3N7_:w
*/ Uw. `7b>B
public class SortUtil { Nho>f
public final static int INSERT = 1; L^2%1GfE{
public final static int BUBBLE = 2; #ym'AN
public final static int SELECTION = 3; >V?eog%~
public final static int SHELL = 4; -`kW&I0
public final static int QUICK = 5; W0@n/U
public final static int IMPROVED_QUICK = 6; %COX7gV
public final static int MERGE = 7; eK?MKe
public final static int IMPROVED_MERGE = 8; t7Iv?5]N
public final static int HEAP = 9; HZC"nb}r4
x.!V^HQSN
public static void sort(int[] data) { uK"=i8rs4
sort(data, IMPROVED_QUICK); !Vn\u
} ghG**3xr
private static String[] name={ {j?FNOJn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *SDs;kg
}; N1}sHyVq7
u<tbbKM
private static Sort[] impl=new Sort[]{ yy^q2P
new InsertSort(), '4+ ur`
new BubbleSort(), -hGk?_Nqa/
new SelectionSort(), 6 l|DU7i
new ShellSort(), 9k'7832u
new QuickSort(), 30#s aGV
new ImprovedQuickSort(), /tx]5`#@7]
new MergeSort(), ;~)5s'
new ImprovedMergeSort(), y|i,|
new HeapSort() ?r "{}%
}; |^"1{7)
)Xz,j9GzJS
public static String toString(int algorithm){ JxdDC^> 0
return name[algorithm-1]; s 8jV(P(O
} "Y =;.:qe
_ @NL;w:!
public static void sort(int[] data, int algorithm) { kzQ+j8.,U
impl[algorithm-1].sort(data); GX!G>
} pHXm>gTd,J
A@!qv#'
public static interface Sort { 45@ I*`
public void sort(int[] data); n?!">G
} &WuN&As!Z
C\Wmq [
public static void swap(int[] data, int i, int j) { }_M~2L?i
int temp = data; ~?Qe?hB
data = data[j]; S}m)OmrmA
data[j] = temp; YW,tCtI0_
} Cx@);4arj
} UJAv`yjG