[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; :yeTzIz]
} ?T&D@Ohsx
int i1=l; nNr3'6lz
int i2=mid+1; BH1To&ol
for(int cur=l;cur<=r;cur++){ aJts
if(i1==mid+1) >#Yq&@G
data[cur]=temp[i2++]; )sr]}S0
else if(i2>r) Qy%/+9L
data[cur]=temp[i1++]; =v}.sJ V?
else if(temp[i1] data[cur]=temp[i1++]; Lj#6K@u@Z
else 'S\H% -
data[cur]=temp[i2++]; 'lF|F+8
} EOiKwhrV
} 3h>Ji1vV
/WMLr5
} +( d2hSIF
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改进后的归并排序: wKN9HT
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package org.rut.util.algorithm.support; {_JLmyaerZ
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import org.rut.util.algorithm.SortUtil; &W%TY:Da|
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/** cW2:D$Pe
* @author treeroot h=aHZ6v
* @since 2006-2-2 d>}%A ]
* @version 1.0 8MdKH7
*/ c}lgWu~
public class ImprovedMergeSort implements SortUtil.Sort { >X]<s^
~tWBCq 6
private static final int THRESHOLD = 10; pJIH_H
@NF8?>!
/* KRQ/wuv
* (non-Javadoc) |cacMgly
* YY9q'x,w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0WFZx Ad"
*/ d0,I]"
public void sort(int[] data) { "v06Fj>q
int[] temp=new int[data.length]; S70ERRk
mergeSort(data,temp,0,data.length-1); BsAglem
} l40$}!!<
xFJ>s-g*
private void mergeSort(int[] data, int[] temp, int l, int r) { J';tpr
int i, j, k; >Y:ouN~<
int mid = (l + r) / 2; 8CL05:&
if (l == r) 9D@Ez"xv
return; C<pF13*4
if ((mid - l) >= THRESHOLD) w?[)nlNW
mergeSort(data, temp, l, mid); 1VeCAx[e
else ;4 &~i
insertSort(data, l, mid - l + 1); Mo/xEB/O
if ((r - mid) > THRESHOLD) e1#}/U
mergeSort(data, temp, mid + 1, r); ]3v
else KNnE5f
insertSort(data, mid + 1, r - mid); rtI4W
F-nt7l
for (i = l; i <= mid; i++) { {"<Q?yA2y
temp = data; CNwhH)*
} 5segzaI
for (j = 1; j <= r - mid; j++) { SOm~];[
temp[r - j + 1] = data[j + mid]; nD_g84us
} {|fA{ Q_R
int a = temp[l]; NO&OuiN
int b = temp[r]; LRs{nN.N
for (i = l, j = r, k = l; k <= r; k++) { HTC7fS
if (a < b) { *?uF&( 0
data[k] = temp[i++]; #X)s=Y&5!T
a = temp; V3-LVgM%
} else { a'|0e]
data[k] = temp[j--]; k;)L-ge9
b = temp[j]; \l:n
} ,UP6.C14
} R'{V&H^Z
} UY==1\
@U&|38
/** ZE :oK
* @param data Deam%)bXM]
* @param l b~|B(lL6Xm
* @param i au8)G_A
*/ 2XE4w# [j
private void insertSort(int[] data, int start, int len) { r"n)I$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h'bxgIl'`
} []@Mk
} zIL.R#|D=
} {3;4=R3
} ScI9.{
f; 22viE
堆排序： ~6OdPD
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package org.rut.util.algorithm.support; {\%x{
OTRTa{TB
import org.rut.util.algorithm.SortUtil; R(:q^?
xGA%/dy,;
/** ?O_;{(F_
* @author treeroot ;c'jBi5W
* @since 2006-2-2 {30A1>0#P
* @version 1.0 V7&L+]!
*/ {u:DC4eut
public class HeapSort implements SortUtil.Sort{ hGpaHY>My
v/kYyz
/* (non-Javadoc) eVy,7goh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }NUP[%
*/ 8T%z{A1T
public void sort(int[] data) { old}}>_
MaxHeap h=new MaxHeap(); +pE-Yn`YS
h.init(data); ;xb:{?
for(int i=0;i h.remove(); j3FDGDrg
System.arraycopy(h.queue,1,data,0,data.length); (BJs6":BFe
} `'g%z: ~
e]rWR
private static class MaxHeap{ 6l50IWj,T
rc$G0O
void init(int[] data){ [1E u6X6
this.queue=new int[data.length+1]; nJ6bC^*)U
for(int i=0;i queue[++size]=data; ub-ZrC'
fixUp(size); 0iwx$u7[
} Oh|Hy/&6W
} M[X& Q
8&3G|m1-2
private int size=0; m:'fk;khN
@P%&Dha
private int[] queue; wL}=$DN
f#[Fqkmj
public int get() { kQYX[e7n
return queue[1]; RhYf+?2
} nlJxF5/
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public void remove() { N5g!,3
SortUtil.swap(queue,1,size--); L"AZ,|wIk
fixDown(1); &'R\yX<J)
} b,I$.&BD
file://fixdown rtOXK4)]I
private void fixDown(int k) { w,^!kO0)~8
int j; _PJd1P.k
while ((j = k << 1) <= size) { b,s T[!X[
if (j < size %26amp;%26amp; queue[j] j++; %rYd=Ri
if (queue[k]>queue[j]) file://不用交换 `,xKK+~YG-
break; gi~*1RIel;
SortUtil.swap(queue,j,k); 0kmZO"K#e
k = j; 'sJYt^
} "/wZtc
} aQcJjF5x
private void fixUp(int k) { oKzLt
while (k > 1) { @q|I$'K]x
int j = k >> 1; p*vEVo
if (queue[j]>queue[k]) b]@^SN9
break; 0p8(Q
SortUtil.swap(queue,j,k); u3kZOsG
k = j; hv8V=Z'Q
} - wCfwC
} dZ_Hj X7
$O=m/l$
} ^hLAMaR
B!6?+<J"
} yyG:Kl
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SortUtil： E7ixl~
>/GVlXA'
package org.rut.util.algorithm; { "=d7i
wU+-;C5e
import org.rut.util.algorithm.support.BubbleSort; -FdhV%5]
import org.rut.util.algorithm.support.HeapSort; Eqnc("m)
import org.rut.util.algorithm.support.ImprovedMergeSort; RP!X5
import org.rut.util.algorithm.support.ImprovedQuickSort; %i$]S`A}
import org.rut.util.algorithm.support.InsertSort; F~4oPB K<
import org.rut.util.algorithm.support.MergeSort; BlMc<k
import org.rut.util.algorithm.support.QuickSort; k\I+T~~xD
import org.rut.util.algorithm.support.SelectionSort; S}mqK|!
import org.rut.util.algorithm.support.ShellSort; {|a=
.r$d 8J
/** &E0P`F,GQA
* @author treeroot $SA8$!:
* @since 2006-2-2 {p-&8-
* @version 1.0 ^pIT,|myY7
*/ n}}$-xl
public class SortUtil { rISg`-
public final static int INSERT = 1; p78X,44xg
public final static int BUBBLE = 2; *+rO3% ;t
public final static int SELECTION = 3; ;(5b5PA
public final static int SHELL = 4; iW9G0Ay
public final static int QUICK = 5; '+JU(x{CCl
public final static int IMPROVED_QUICK = 6; M|6l
public final static int MERGE = 7; B^Fe.ty
public final static int IMPROVED_MERGE = 8; 1>|2B&_^
public final static int HEAP = 9; 3%p^>D\
4At{(fwW
public static void sort(int[] data) { |Q[[WHqj2f
sort(data, IMPROVED_QUICK); t&*X~(Yb!
} -YPUrU[)
private static String[] name={ :/A3l=}iV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EA) K"C
}; B=8],_
h0_od/D1r
private static Sort[] impl=new Sort[]{ oF7o"NHaWa
new InsertSort(), ,*!HN &
new BubbleSort(), ^Cs?FF@P
new SelectionSort(), !hdOH3h=
new ShellSort(), 76Ho\}-U">
new QuickSort(), B"P-h^oiV
new ImprovedQuickSort(), YEqZ((H
new MergeSort(), -C1,$mkj
new ImprovedMergeSort(), sT ]JDC6
new HeapSort() {)=h
}; s"gNHp.oF
mW-4
public static String toString(int algorithm){ AXFQd@#
return name[algorithm-1]; B~xT:r
} DPqk~KCM
U|ZYoc+](
public static void sort(int[] data, int algorithm) { 2SVBuV/R
impl[algorithm-1].sort(data); }M*yE]LL;Z
} ,aq0Q<}~lc
^/b3_aM5d
public static interface Sort { '~{bq'7`m
public void sort(int[] data); M^S <G
} :rR)rj'
xL&M8:
public static void swap(int[] data, int i, int j) { #k?uYg8
int temp = data; ~?E.U,R
data = data[j]; Q#M@!&
data[j] = temp; Pr|BhX
} ,E ]vM&
} O1xK\ogv