[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; -7L
} !&0a<~Wi
int i1=l; )8]3kQffJ=
int i2=mid+1; kpT>G$s~gy
for(int cur=l;cur<=r;cur++){ &:#A+4&
if(i1==mid+1) M\jB)@)
data[cur]=temp[i2++]; TMtI^mkB:
else if(i2>r) LH.%\TMN$
data[cur]=temp[i1++]; i0i`k^bA
else if(temp[i1] data[cur]=temp[i1++]; .' IeHh
else Q %y,;N"ro
data[cur]=temp[i2++]; rBD2Si=
} cl2ze
} .r*#OUC
>gGil|I
} j #es2;
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改进后的归并排序: Bpas[2gYC
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package org.rut.util.algorithm.support; P09,P
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import org.rut.util.algorithm.SortUtil; nO}$ 76*'0
F%y{% C7l
/** QP<FCmt8
* @author treeroot ?GfxBZWJ
* @since 2006-2-2 ip674'bq7R
* @version 1.0 jB/V{Y#y9@
*/ 6*V8k%H
public class ImprovedMergeSort implements SortUtil.Sort { E6JV}`hSk
Fi/jR0]e2
private static final int THRESHOLD = 10; Bj+wayMi
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/* h/{8bC@bi
* (non-Javadoc) Bf+^O)Ns^
* YjL t&D:IZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W`5a:"Vg
*/ oB3q AP
public void sort(int[] data) { {[N?+ZJD*L
int[] temp=new int[data.length]; cPm~` Zd
mergeSort(data,temp,0,data.length-1); >z5Oy
} y78z>(jV
q:Wq8
private void mergeSort(int[] data, int[] temp, int l, int r) { -@#Pc#
int i, j, k; !&\meS{
int mid = (l + r) / 2; a.1`\$]d
if (l == r) <(Tiazg
return; 4^`PiRGt
if ((mid - l) >= THRESHOLD) +{'lZa
mergeSort(data, temp, l, mid); v/ eB,p
else Jtext%"eNg
insertSort(data, l, mid - l + 1); s v6INe:
if ((r - mid) > THRESHOLD) a&8l[xe1
mergeSort(data, temp, mid + 1, r); q'by;g*m
else ([1=>Jw"
insertSort(data, mid + 1, r - mid); #Af)n(
h^`{ .TlN
for (i = l; i <= mid; i++) { s5nB(L*Pjp
temp = data; (26Bs':M~
} qih6me8C
for (j = 1; j <= r - mid; j++) { .$UTH@;7
temp[r - j + 1] = data[j + mid]; /^~p~HKtx
} -S`TEX
int a = temp[l]; E}Ljo
int b = temp[r]; *-{Omqw
for (i = l, j = r, k = l; k <= r; k++) { J&'>IA
if (a < b) { \I:UC %
data[k] = temp[i++]; P`z7@9*j
a = temp; (2cGHYU3N<
} else { nhp)yW
data[k] = temp[j--]; x Ridc^
b = temp[j]; %;'~%\|dZM
} B%)zGTp6
} QXsfp
} &^AzIfX}Gw
|e~u!V\m
/** >}70]dN7b
* @param data 6|%^pjX5
* @param l JThk Wx
* @param i =z+-l5Gu"
*/ JN-D/s
private void insertSort(int[] data, int start, int len) { N&x@_t""
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H&w(]PDh
} 8f|9W%jt
} Z4=_k{*
} N'I?fWN!;R
} t;h+Cf4
m=#aHF
堆排序： ?`za-+<r<
o`oRG)QC
package org.rut.util.algorithm.support; 3D{82*&
[kVpzpGr
import org.rut.util.algorithm.SortUtil; b?sAEU;
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/** 1hF2eNh
* @author treeroot 2Y9y5[K,F)
* @since 2006-2-2 oZ?IR#^
* @version 1.0 qxRT1B]{Wx
*/ D7%^Ly
public class HeapSort implements SortUtil.Sort{ yjeqv-7
\x3^
/* (non-Javadoc) IiG4ib>)W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @>d&5}F_>{
*/ pZyb
public void sort(int[] data) { GjG{qR
MaxHeap h=new MaxHeap(); f<Va<TL6-
h.init(data); ]!n*V/g
for(int i=0;i h.remove(); FRb&@(;
System.arraycopy(h.queue,1,data,0,data.length); y.L|rRe@P
} Wh#os,U$
,| $|kO/
private static class MaxHeap{ 40`9t Xn
L&+% Wd~
void init(int[] data){ 1"mnzbf8*
this.queue=new int[data.length+1]; AaJ,=eQ
for(int i=0;i queue[++size]=data; |:!EHFr
fixUp(size); FcuEeca
} %:yHMEG]'
} ;}UIj{sj*
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private int size=0; I8E\'`:<
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private int[] queue; J"m%q\'
{s9y@c*15.
public int get() { : OSmr
return queue[1]; <P?3GT/
} EKeBTb
3C E 39W
public void remove() { F]dmc,Q
SortUtil.swap(queue,1,size--); '[7C~r{%
fixDown(1); l4R<`b\Jt
} k1~nd=p
file://fixdown JKEXYE
private void fixDown(int k) { ?yK%]1O
int j; p,_6jdz
while ((j = k << 1) <= size) { eLe,=
if (j < size %26amp;%26amp; queue[j] j++; 75QXkJu
if (queue[k]>queue[j]) file://不用交换 F[Guy7?O
break; eSQzjR*
SortUtil.swap(queue,j,k); ')Dp%"\?
k = j; 9-X{x95]
} +35)=Uov
} ?=pZmvQg
private void fixUp(int k) { 1{;[q3a
while (k > 1) { x"zjN'|
int j = k >> 1; Z7mGC`>
if (queue[j]>queue[k]) .(gT+5[
break; EU?&
SortUtil.swap(queue,j,k); i9f7=-[U_
k = j; ,?7xb]h
} e0G}$ as
} lEVQA*u[
2l\D~ y
} 7g4M/?H}K
rU2YMghE
} R &1mo
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SortUtil： YiY&;)w
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package org.rut.util.algorithm; JsWq._O{/
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import org.rut.util.algorithm.support.BubbleSort; 1DI"LIL
import org.rut.util.algorithm.support.HeapSort; /: \VwH
import org.rut.util.algorithm.support.ImprovedMergeSort; 2f}K#i8
import org.rut.util.algorithm.support.ImprovedQuickSort; )Yy#`t
import org.rut.util.algorithm.support.InsertSort; ,_5YaX:<4
import org.rut.util.algorithm.support.MergeSort; ZmYSi$B
import org.rut.util.algorithm.support.QuickSort; <?=mLOo=
import org.rut.util.algorithm.support.SelectionSort; E<98ahZ?l
import org.rut.util.algorithm.support.ShellSort; tNi%}~Z
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/** GtAJ#[5w
* @author treeroot q|Pt>4c5?
* @since 2006-2-2 a@V/sh
* @version 1.0 8f6;y1!;
*/ R|Q_W X
public class SortUtil { GWA!Ab'<U
public final static int INSERT = 1; mv9E{m
public final static int BUBBLE = 2; ="'P=Xh!8
public final static int SELECTION = 3; J6^Ct
public final static int SHELL = 4; JPoK\-9NT
public final static int QUICK = 5; [iO$ c]!H
public final static int IMPROVED_QUICK = 6; ,;+91lR3
public final static int MERGE = 7; P(YG@
public final static int IMPROVED_MERGE = 8; NP<F==,
public final static int HEAP = 9; 7KSGG1ts
n'&`9M['%d
public static void sort(int[] data) { W2W2WyPk
sort(data, IMPROVED_QUICK); U_ ?elz\
} yBD2
private static String[] name={ h3;o!FF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H-\{w
}; Kt!IyIa;Ht
#.<F5
private static Sort[] impl=new Sort[]{ hB GGs
new InsertSort(), *n|0\V<
new BubbleSort(), tci%=3,)
new SelectionSort(), nTlv'_Y(
new ShellSort(), &T|&D[@
new QuickSort(), u8k{N
new ImprovedQuickSort(), BJ.8OU*9]S
new MergeSort(), h<^:Nn
new ImprovedMergeSort(), U<,Kw6K
new HeapSort() UmD-7Fd
}; %&=(,;d
rJc)<OZjT
public static String toString(int algorithm){ Jn <^Q7N
return name[algorithm-1]; 7)(`
} :C:N]6_{SZ
>$S,>d_k`
public static void sort(int[] data, int algorithm) { QSs$
impl[algorithm-1].sort(data); TXh@
} b]g&rwXYt
t+4Y3*WeGF
public static interface Sort { (HrkUkw
public void sort(int[] data); N5rG.6K
} $qUta<o2@
\gI:`>- x
public static void swap(int[] data, int i, int j) { h@m n GE
int temp = data; ?lwQne8/
data = data[j]; kj3o1Y
data[j] = temp; o"ah\"#el
} ~ Dp:j*H
} #G , *j