[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; &,#VhT![
} 1'g?B`
int i1=l; \myj Y
int i2=mid+1; adxJA}K}
for(int cur=l;cur<=r;cur++){ sX=!o})0
if(i1==mid+1) Cf+O7Y`^
data[cur]=temp[i2++]; d~n+Ds)%F
else if(i2>r) 7N""w5
data[cur]=temp[i1++]; ;ndg,05_
else if(temp[i1] data[cur]=temp[i1++]; ?+TD2~rD(
else ))MP]j9 T
data[cur]=temp[i2++]; H)4Rs~;{'g
} CsE|pXVG
} 5= F-^
-7yX>Hjl
} jLEU V
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改进后的归并排序: gNO$WY^
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package org.rut.util.algorithm.support; lF#Kg!-l
mhs%b4'>
import org.rut.util.algorithm.SortUtil; .a^/r'?
-Zw"o>
/** ck^Z,AKL+
* @author treeroot G{s ,Y^
* @since 2006-2-2 )WzCUYE1/
* @version 1.0 8G@FX $$Q
*/ Tq?W @DM*
public class ImprovedMergeSort implements SortUtil.Sort { x^;nfqn|
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private static final int THRESHOLD = 10; 2L\h+)
gF:wdcO
/* . XY'l
* (non-Javadoc) \mycn/e
* x,V_P/?%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bhgh ]{
*/ ES+&e/G"ds
public void sort(int[] data) { Vs"M Cqi
int[] temp=new int[data.length]; <^&'r5H
mergeSort(data,temp,0,data.length-1); ,iHt*SZ,*
} y}3V3uqK
R@EFG%|`_
private void mergeSort(int[] data, int[] temp, int l, int r) { LQS*/s0
int i, j, k; Comuc
int mid = (l + r) / 2; K}zw%!ex
if (l == r) FJD*A`a
return; 712i|
if ((mid - l) >= THRESHOLD) M\]E;C'"U
mergeSort(data, temp, l, mid); 4gZN~_AI<
else $X{& KLM[
insertSort(data, l, mid - l + 1); f]hW>-B(q
if ((r - mid) > THRESHOLD) 1|%$ie
mergeSort(data, temp, mid + 1, r); ,rN7X<s54
else $~j]/U
insertSort(data, mid + 1, r - mid); ]f\rB8k|&
''(T3;^ +
for (i = l; i <= mid; i++) { }Jc^p
temp = data; 6-^+btl)#
} )Qo6bei!
for (j = 1; j <= r - mid; j++) { V2bod=&Lc
temp[r - j + 1] = data[j + mid]; EUNG&U
} q}8R>`Z{
int a = temp[l]; XR+2|o
int b = temp[r]; D/)xe:
for (i = l, j = r, k = l; k <= r; k++) { Z# :Ww
if (a < b) { B^OhL!*tI
data[k] = temp[i++]; -8TLnl~[
a = temp; b :+ X3
} else { Zs4N0N{
data[k] = temp[j--]; abF_i#
b = temp[j]; 4f1*?HX&
} <;Xj4 J
} "'8$hV65.p
} 1wq6E
=EG[_i{r
/** O[m+5+
* @param data mT9TSW}
* @param l 'E@D
* @param i B.{yf4a#L
*/ E;X'.7[c
private void insertSort(int[] data, int start, int len) { 1b't"i M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xOt|j4
} +[>m`XTq
} KUp lN1Sy
} 4u;W1=+Vn
} s5[ Cr"q7B
mjw:Z,
堆排序： 2yN~[,L
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package org.rut.util.algorithm.support; 1M+mH#?
Hu;#uAnxQ
import org.rut.util.algorithm.SortUtil; 5bAy@n
$}jSIn=~|t
/** ;Z8K3p
* @author treeroot HID;~Ne
* @since 2006-2-2 U>{z*D
* @version 1.0 8L&#<Ol
*/ Mbi)mybM
public class HeapSort implements SortUtil.Sort{ BO1Mz=q
zIlQqyOQ8
/* (non-Javadoc) 3n,F5?!m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q2+e`
*/ }?H|9OS
public void sort(int[] data) { (llg!1
MaxHeap h=new MaxHeap(); Wx^L~[l
h.init(data); 0uj3kr?cv
for(int i=0;i h.remove(); U/TF,JUI
System.arraycopy(h.queue,1,data,0,data.length); 05w_/l+
} Q.!D2RZc
mH;\z;lyK
private static class MaxHeap{ C7nLa@
j{nL33T%
void init(int[] data){ VRT| OUq
this.queue=new int[data.length+1]; JH2d+8O:qK
for(int i=0;i queue[++size]=data; RU@`+6j+
fixUp(size); ]r|X[9
} >8QLo8)3C
} teET nz_L
MvQ0"-ZQ
private int size=0; B1\}'g8%f
l].dOso$`
private int[] queue; g }5lGz4
V:yia^1
public int get() { P)Sw`^d
return queue[1]; >+&524xc
} EdLbVrN,
<AzvVSA,
public void remove() { <&Y7Q[
SortUtil.swap(queue,1,size--); Ij4oH
fixDown(1); 6>zO"9
} IL&Mf9m
file://fixdown M"1}"ex#
private void fixDown(int k) { m{;2!
int j; w8c71C
while ((j = k << 1) <= size) { ZI}7#K<9X
if (j < size %26amp;%26amp; queue[j] j++; ]w"r4HlCx
if (queue[k]>queue[j]) file://不用交换 6gNsh
break; Il,2^54q
SortUtil.swap(queue,j,k); QT&2&#Z
k = j; '0lX;z1
} GMrjZ
} %;~Vc{Xxt/
private void fixUp(int k) { (~#{{Ja
while (k > 1) { Etj@wy/E
int j = k >> 1; ,eW K~ pa
if (queue[j]>queue[k]) V+(1U|@~
break; Il`35~a
SortUtil.swap(queue,j,k); <Y9%oJn%
k = j; ">@]{e*
} 'H0uvvhOp
} Uf4A9$R.G
'pa[z5{k+
} Y{ijSOl3
\!x~FVA
} bbCH(fYbu
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SortUtil： HRn Q*
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package org.rut.util.algorithm; 8iA[w-Pv
NwP!.
import org.rut.util.algorithm.support.BubbleSort; C-u'Me)H
import org.rut.util.algorithm.support.HeapSort; *t=8^q(K[
import org.rut.util.algorithm.support.ImprovedMergeSort; %Ya%R@b}
import org.rut.util.algorithm.support.ImprovedQuickSort; /N'0@q
import org.rut.util.algorithm.support.InsertSort; D~P3~^
import org.rut.util.algorithm.support.MergeSort; 69N/_V
import org.rut.util.algorithm.support.QuickSort; UTwXN |'|
import org.rut.util.algorithm.support.SelectionSort; <hkSbJF
import org.rut.util.algorithm.support.ShellSort; 1 etl:gcEC
",O |uL
/** -Y>,\VEK
* @author treeroot 1K{u>T
* @since 2006-2-2 1*U)\vK~
* @version 1.0 RGg=dN
*/ M$YU_RPl+
public class SortUtil { SbLm
public final static int INSERT = 1; -+ylJo[D
public final static int BUBBLE = 2; L)(JaZyV5
public final static int SELECTION = 3; ] MP*5U>;
public final static int SHELL = 4; yzyBr1s
public final static int QUICK = 5; Jt++3]
public final static int IMPROVED_QUICK = 6; Y=83r]%
public final static int MERGE = 7; 0{Uc/
public final static int IMPROVED_MERGE = 8; F+@/"1c
public final static int HEAP = 9; RW-)({
T3wQRn
public static void sort(int[] data) { $|"Y|3&X
sort(data, IMPROVED_QUICK); aC90IJ8^
} OCW0$V6;D-
private static String[] name={ @6lw_E_5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {{6D4M|s
}; U1ZKJ<pv
YuXCRw9p;
private static Sort[] impl=new Sort[]{ f`<elWgc"
new InsertSort(), C]EkVcKFA
new BubbleSort(), _"%hcCMw
new SelectionSort(), ^ YOCHXg
new ShellSort(), XQ3"+M_KG
new QuickSort(), JtvZ~s
new ImprovedQuickSort(), =cR"_Z[8X
new MergeSort(), vmzc0J+3p
new ImprovedMergeSort(), DHq#beN
new HeapSort() ='vD4}"j
}; NiH =T
k=W~ot&
public static String toString(int algorithm){ nnOgmI7
return name[algorithm-1]; &t~NR$@
} $-)T
f@@7?5fW
public static void sort(int[] data, int algorithm) { Uiv4'vYg
impl[algorithm-1].sort(data); aPdEEqc\l
} de/oK c
bey:Qj??
public static interface Sort { B[.$<$}G
public void sort(int[] data); $d-$dM?R5
} ;Rlf[](iL
%9 3R/bx
public static void swap(int[] data, int i, int j) { 1Q_Q-Z
int temp = data; }_Ci3|G>%D
data = data[j]; ds9U9t
data[j] = temp; " Tk,
} {'Y()p3kl
} enx+,[