[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; q'zV9
} 0;6^fiSY;
int i1=l; 6.0/asN}
int i2=mid+1; 4^>FN"Ve`B
for(int cur=l;cur<=r;cur++){ 4!,`|W1
if(i1==mid+1) rO;Vr},3\%
data[cur]=temp[i2++]; "6} #65
else if(i2>r) ,!{/Y7PmJ
data[cur]=temp[i1++]; X1J'
else if(temp[i1] data[cur]=temp[i1++]; t(sQw '>
else B]C 9f
data[cur]=temp[i2++]; r'/H3
} UwQyAD]Ht
} 8`4Z%;1
Pm}
} + NpHk
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改进后的归并排序: hZ;[}5T\<S
gb,X"ODq
package org.rut.util.algorithm.support; x8v2mnk
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import org.rut.util.algorithm.SortUtil; a{deN9Qn
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/** D3MRRv#
* @author treeroot IBY(wx[5S
* @since 2006-2-2 }.$5'VGO
* @version 1.0 s<;kTReA
*/ MNzWTn@
public class ImprovedMergeSort implements SortUtil.Sort { <dAD-2O+
q/N1q&
private static final int THRESHOLD = 10; 9}_ccq
Bf-KCqC".
/* CPj8`kl
* (non-Javadoc) 0Ia8x?80V
* X$4MpXx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PRyZ; @
*/ &!=[.1H<
public void sort(int[] data) { ='"hB~[
int[] temp=new int[data.length]; }wkZ\q[
mergeSort(data,temp,0,data.length-1); @$bEY#*C
} ,^#{k!uaC{
F]4JemSjK
private void mergeSort(int[] data, int[] temp, int l, int r) { [fjP.kw;J
int i, j, k; ( ;(DI^Un8
int mid = (l + r) / 2; dRXEF6G
if (l == r) FWJhi$\:D]
return; .dvOUt I[
if ((mid - l) >= THRESHOLD) -%g&O-i\
mergeSort(data, temp, l, mid); L=1~)>mP
else |_ u
insertSort(data, l, mid - l + 1); TTSyDl
if ((r - mid) > THRESHOLD) 1[&V6=n
mergeSort(data, temp, mid + 1, r); }kK6"]Tj
else j4fv-{=$
insertSort(data, mid + 1, r - mid); Z<2j#rd
; wpX
for (i = l; i <= mid; i++) { ~t` uq
temp = data; ]LE
} /l)|B
for (j = 1; j <= r - mid; j++) { c%bGVRhE
temp[r - j + 1] = data[j + mid]; -3)]IA
} i7UE9Nyl*
int a = temp[l]; 6_.K9;Gd
int b = temp[r]; *t-Wol
for (i = l, j = r, k = l; k <= r; k++) { G+$A|'<`z
if (a < b) { x2M'!VK>n1
data[k] = temp[i++]; CI~P3"`]
a = temp; }0 BKKU+
} else { REe<k<>p~
data[k] = temp[j--]; ~$PQ8[=
b = temp[j]; 06dk K)`
} Y9K$6lz
} rz
} Cqy)+x_OQ,
n> >!dg Og
/** ,vnHEY&
* @param data +frkC| .
* @param l FuKp`T-H
* @param i {);S6F$[3
*/ )0Lno|l
private void insertSort(int[] data, int start, int len) { x2KIGG^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZMI!Sl
} }!W,/=z*
} @ z{E
} n'&Cr0{
} UZ`GS$D@
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堆排序： %DKQ
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package org.rut.util.algorithm.support; dCF!.
xP3v65Q1
import org.rut.util.algorithm.SortUtil; *A>I)a<:
w,<nH:~
/** xux j
* @author treeroot W6d[v/+K+
* @since 2006-2-2 _9^
* @version 1.0 3V,$FS]
*/ 4}4K6y<q
public class HeapSort implements SortUtil.Sort{ \R6D'Yt
8w:A""
/* (non-Javadoc) RwG@C|sG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h{R>L s
*/ [|XMR=\>
public void sort(int[] data) { ?_!} lg
MaxHeap h=new MaxHeap(); /]mfI&l+9
h.init(data); ~ PO)>;
for(int i=0;i h.remove(); <Ag`pZ<s
System.arraycopy(h.queue,1,data,0,data.length); N<e=!LV
} Ed(6%kd
Y\Z.E;
private static class MaxHeap{ rhLm2q
>AbgJ*X.
void init(int[] data){ @Yv.HhO9
this.queue=new int[data.length+1]; 7({"dW
for(int i=0;i queue[++size]=data; ;{zgp
fixUp(size); ZW6ZO[`6
} M_5$y)M
} #`1@4,iC
sbxOnwP\
private int size=0; tML[~AZh
#i8] f{
private int[] queue; fO;#;p.
7kQZ$sLc
public int get() { Ic%c%U=i
return queue[1]; 2=&4@c|cn
} Stzv
Z|8oD*,
public void remove() { WB:NV=&^
SortUtil.swap(queue,1,size--); 9L$bJO-3
fixDown(1); wRa$b
} YH0=YmU#X
file://fixdown Wsz-#kc\[
private void fixDown(int k) { {hS9FdWA;
int j; sS 5aJ}Qs
while ((j = k << 1) <= size) { l"I G;qO.
if (j < size %26amp;%26amp; queue[j] j++; u9TiEEof3
if (queue[k]>queue[j]) file://不用交换 MDHTZ94\Q
break; mHm"QBa!
SortUtil.swap(queue,j,k); q0Hor
k = j; 0gR!W3dh
} D*Cn!v$
} 7Vn;LW
private void fixUp(int k) { 'zEmg}
while (k > 1) { !)Y T_ib
int j = k >> 1; O}Ipg[h
if (queue[j]>queue[k]) ~^<ju6O'
break; 9^DXw!
SortUtil.swap(queue,j,k); J=%(f1X<W
k = j; 20Umjw.D
} b5-WK;
} -^Pn4y]A)
k>2tC<
} =JqKdLH
7j9X<8*
} _'W en
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SortUtil： >uu]K
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package org.rut.util.algorithm; %\ifnIQ
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import org.rut.util.algorithm.support.BubbleSort; p\"WX
import org.rut.util.algorithm.support.HeapSort; lURL;h
import org.rut.util.algorithm.support.ImprovedMergeSort; 6X2~30pdE
import org.rut.util.algorithm.support.ImprovedQuickSort; ;tBc&LJ?
import org.rut.util.algorithm.support.InsertSort; Lrr1) h
import org.rut.util.algorithm.support.MergeSort; $Ur-Q d
import org.rut.util.algorithm.support.QuickSort; wM]j#
import org.rut.util.algorithm.support.SelectionSort; 'Ti7}K
import org.rut.util.algorithm.support.ShellSort; jjT|@\-u
%yVboA1
/** h#Z5vH
* @author treeroot .L#xX1qr
* @since 2006-2-2 @@?P\jv~
* @version 1.0 L.cGt"{
*/ ~{8X$xs
public class SortUtil { ,%bG]5
public final static int INSERT = 1; Yv!r>\#0S
public final static int BUBBLE = 2; Za*QX|
public final static int SELECTION = 3; P5qY|_
public final static int SHELL = 4; q|;Sn
public final static int QUICK = 5; #o(c=
public final static int IMPROVED_QUICK = 6; VGHy|5K$
public final static int MERGE = 7; I6jDRC0<
public final static int IMPROVED_MERGE = 8; ?3I93Bt7
public final static int HEAP = 9; F!LVyY"w
-W#-m'Lvu
public static void sort(int[] data) { 'Q^P#<<
sort(data, IMPROVED_QUICK); 6r|BiHP
} =GP~h*5es
private static String[] name={ NoR=:Q 9e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~h:/9q
}; g[#4`Q<.
Zx1I&K\Cd
private static Sort[] impl=new Sort[]{ (_9cL,v
new InsertSort(), nVO|*Bnf)
new BubbleSort(), @CxXkR
new SelectionSort(), ~O;'],#Co
new ShellSort(), f&n6;N
new QuickSort(), UC u4S >
new ImprovedQuickSort(), /+11`B09
new MergeSort(), KMhEU**
new ImprovedMergeSort(), UP8=V>T02
new HeapSort() 5D~>Ed;
}; |t1ij'N
S7I8BS[*v
public static String toString(int algorithm){ :k-(%E](
return name[algorithm-1]; VSxls
} cNd;qO0$
4X()D {uR
public static void sort(int[] data, int algorithm) { %Ob#GA+
impl[algorithm-1].sort(data); A#WvN>
} SEL7,8 Hm
bnm3 cR:h"
public static interface Sort { lrE|>R
public void sort(int[] data); _YT9zG
} 1]yjhw9g
K4H U9!
public static void swap(int[] data, int i, int j) { P ]prrKZe,
int temp = data; f`[gRcZ-
data = data[j]; KBb{Z;%
data[j] = temp; %+1;iuDL
} ]Uy cT3A
} kY$vPHZpN