[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; 1ZRkVHiz0
} q &{<HcP
int i1=l; X's<+hK&
int i2=mid+1; #pK" ^O*!
for(int cur=l;cur<=r;cur++){ u^JsKG+,:
if(i1==mid+1) YHu]\'Ff
data[cur]=temp[i2++]; lsOfpJ
else if(i2>r) n{etDO
data[cur]=temp[i1++]; zA.0Sm
else if(temp[i1] data[cur]=temp[i1++]; 53a^9
else ~LOE^6C+~o
data[cur]=temp[i2++]; ;b1B*B
} i`+bSg
} T,>L
5F ^VvzNn
} lQ!OD&6
%.$7-+:7A
改进后的归并排序: S++~w9}
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package org.rut.util.algorithm.support; B@6L<oZ
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import org.rut.util.algorithm.SortUtil; 8 Zp^/43
wD{c$TJ?{F
/** Kdp($L9r
* @author treeroot G-RDQ
* @since 2006-2-2 3/ }
* @version 1.0 Qr7v^H~E4.
*/ 0x]?rd+q8Q
public class ImprovedMergeSort implements SortUtil.Sort { vDi Opd
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private static final int THRESHOLD = 10; ^->S7[N?
"&4r!2A
/* 6'@{ * u
* (non-Javadoc) x{<l8vL=-c
* E!mv}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w7Y@wa!
*/ 02*qf:kTnA
public void sort(int[] data) { Ov?J"B'F
int[] temp=new int[data.length]; IOuqC.RJ}o
mergeSort(data,temp,0,data.length-1); S1mMz i
} kL0K[O
H, :]S-T
private void mergeSort(int[] data, int[] temp, int l, int r) { zUv#%Q8vw
int i, j, k; 6},[HpXRc4
int mid = (l + r) / 2; /}L2LMIm
if (l == r) &TA{US3~
return; ]Zc|<f;
if ((mid - l) >= THRESHOLD) -rm[.
mergeSort(data, temp, l, mid); bGgpPV
else e3:L]4t
insertSort(data, l, mid - l + 1); o,*D8[
if ((r - mid) > THRESHOLD) uZ-ZZE C
mergeSort(data, temp, mid + 1, r); <9yh:1"X
else u{\'/c7G
insertSort(data, mid + 1, r - mid); S5y.H
\#I$H9O
for (i = l; i <= mid; i++) { |C<#M<
temp = data; 25{_x3t^
} 2@GizT*mA
for (j = 1; j <= r - mid; j++) { ^rP]B-)
temp[r - j + 1] = data[j + mid]; +s"6[\H1d
} S**eI<QFSk
int a = temp[l]; @v#P u_
int b = temp[r]; \i%mokfbc
for (i = l, j = r, k = l; k <= r; k++) { :Ez,GAk
if (a < b) { $#u'XyA
data[k] = temp[i++]; ,bdjk(
a = temp; &s(&B>M
} else { uXh:/KO
data[k] = temp[j--]; DHw)]WB M
b = temp[j]; Kob,}NgqZ
} +?m.uY(
} xHJkzI
} g""GQeR
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/** bG@2f"
* @param data tZKw(<am
* @param l fZ7AGP
* @param i $Emu*'
*/ N~mr@rXC
private void insertSort(int[] data, int start, int len) { ZDR@VYi+~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /+SLq`'u)
} rHX^bcYK
} W_Y8)KxG:L
} :Q3pP"H,}
} H%>4z3n
u%)gnj_
堆排序： 3+>n!8x ;A
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package org.rut.util.algorithm.support; '"\M`G
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import org.rut.util.algorithm.SortUtil; %(lO>4>|
CYW@Km{e
/** $%cc[[/U
* @author treeroot qVE0[ve
* @since 2006-2-2 Q,xL8i M,
* @version 1.0 d)YlD]I
*/ 3 J04 $cD
public class HeapSort implements SortUtil.Sort{ }:ZA)
qEST[S V
/* (non-Javadoc) J}X{8Ds9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FHSoj=
*/ :Tg+)cZ
public void sort(int[] data) { 67& hXIp
MaxHeap h=new MaxHeap(); &S*~EM.l8
h.init(data); ,=m.WmXE
for(int i=0;i h.remove(); Jd>~gA}l
System.arraycopy(h.queue,1,data,0,data.length); s51$x M
} J @"#
+hmFFQQ}
private static class MaxHeap{ @9gZH_ur>E
LJ(WU)CPc
void init(int[] data){ = (F
this.queue=new int[data.length+1]; -o6rY9\_!
for(int i=0;i queue[++size]=data; :BF? r
fixUp(size); [fa4
} A>yU0\A
} l:!L+t*}6
ilL0=[2
private int size=0; !rM~
1jl!VU6
private int[] queue; E6A"Xo
`S@TiD*
public int get() { )O~[4xV~
return queue[1]; .z`70ot?
} GrL{q;IO
^QRg9s,T<
public void remove() { |:=o\eu&
SortUtil.swap(queue,1,size--); -[V-f> :
fixDown(1); ^[tE^(|T
} ~y!'\d>q<
file://fixdown hJ'H@L7
private void fixDown(int k) { 6@J=n@J$p
int j; ((k"*f2%
while ((j = k << 1) <= size) { c~Ka) dF|
if (j < size %26amp;%26amp; queue[j] j++; 7w/IHML
if (queue[k]>queue[j]) file://不用交换 #dA$k+3
break; \WCQ>c?~
SortUtil.swap(queue,j,k); I9*cEZ!l=e
k = j; n~*".ZC'Y
} %X{EupiFA
} 8-#%l~dr
private void fixUp(int k) { $RPW/Lyiq
while (k > 1) { }~XWtWbd-
int j = k >> 1; 'jtC#:ePK
if (queue[j]>queue[k]) Wp=3heCa6
break; )\fY1WD
SortUtil.swap(queue,j,k); f&^(f1WO
k = j; pIJXP$v3
} +$,Re.WnP
} O<gfZ>
k&]nF,f
} n{;j
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} &7aWVKon
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SortUtil： L[G O6l
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package org.rut.util.algorithm; o%$.8)B9F
9)q3cjP{<
import org.rut.util.algorithm.support.BubbleSort; 5AYOM=O]t
import org.rut.util.algorithm.support.HeapSort; %a;#]d
import org.rut.util.algorithm.support.ImprovedMergeSort; <\aeC2~M
import org.rut.util.algorithm.support.ImprovedQuickSort; =Ph8&l7~sp
import org.rut.util.algorithm.support.InsertSort; ut{T:kT
import org.rut.util.algorithm.support.MergeSort; j9+$hu#a
import org.rut.util.algorithm.support.QuickSort; >gk_klLh
import org.rut.util.algorithm.support.SelectionSort; Lx^ eaP5
import org.rut.util.algorithm.support.ShellSort; /U~|B.z@6
#<im?
/** 6[> lzEZ
* @author treeroot X*8y"~X|vq
* @since 2006-2-2 *v>ZE6CL
* @version 1.0 )h!cOEt
*/ A=Wg0eYy\
public class SortUtil { m~ tvuz I
public final static int INSERT = 1; =!O->C:
public final static int BUBBLE = 2; #o.e (C
public final static int SELECTION = 3; >ZgzE
public final static int SHELL = 4; z$32rt8{`v
public final static int QUICK = 5; k_al*iM>H
public final static int IMPROVED_QUICK = 6; >qjV{M
public final static int MERGE = 7; }]?Si6_ZZ
public final static int IMPROVED_MERGE = 8; 'rD6MY
public final static int HEAP = 9; ^mS |ff
>:;dNVz
public static void sort(int[] data) { kNEEu!G
sort(data, IMPROVED_QUICK); Zp_(vOc
} hRcb}>pr
private static String[] name={ IV QH p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yBIlwN`kB
}; gV_/t+jI
2ej7Ql_@c
private static Sort[] impl=new Sort[]{ 'Ts:.
new InsertSort(), Hd|l6/[xz
new BubbleSort(), `2~>$Tr
new SelectionSort(), --$o$EP`
new ShellSort(), ]rmBM
new QuickSort(), !d*[QD8
new ImprovedQuickSort(), S:\i M:
new MergeSort(), ;SR ESW
new ImprovedMergeSort(), $Gn.G_"v
new HeapSort() ) nfoDG#O
}; #x%'U}sF
P:qmg"i@3
public static String toString(int algorithm){ qfkHGW?1/j
return name[algorithm-1]; weitDr6
} *dzZOe>,
E*_^+ %
public static void sort(int[] data, int algorithm) { ));#oQol9
impl[algorithm-1].sort(data); 5sD,gZ7
} g;IlS*Ld
T)C@6/
public static interface Sort { da{]B5p\
public void sort(int[] data); $EMOz=)I#
} s:`i~hjq
85{m+1O~
public static void swap(int[] data, int i, int j) { B*7kX&Uq
int temp = data; ntiS7g e1
data = data[j]; T X`X5j
data[j] = temp; #m+!<
} l{3B}_,
} t<%0eu|