[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; /1D]\k()
} )\K;Ncp[
int i1=l; Tx)!qpZ
int i2=mid+1; {p.D E
for(int cur=l;cur<=r;cur++){ 3QM;K^$
if(i1==mid+1) sVzU>
data[cur]=temp[i2++]; MX*T.TG8
else if(i2>r) NWL\"xp `t
data[cur]=temp[i1++]; 4H 4W
else if(temp[i1] data[cur]=temp[i1++]; "!w$7|%T
else ,^Ug[pGG-
data[cur]=temp[i2++]; ^ &UezDTS
} ppYIVI
} 0 $Ygt0d
"p Rr>Fa
} 8nV#\J9
x&^>|'H
改进后的归并排序: *,x-}%X
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package org.rut.util.algorithm.support; MawWgd*
XHN*'@ 77;
import org.rut.util.algorithm.SortUtil; s}1S6*Cr
[B0]%!hFw
/** mE>v (JY
* @author treeroot #k}x} rn<'
* @since 2006-2-2 6I8A[
* @version 1.0 ,q_'l?Pn
*/ _U Q|I|V#
public class ImprovedMergeSort implements SortUtil.Sort { 1UHlA8w7Q
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private static final int THRESHOLD = 10; &Y`V A
H]I^?+)9
/* <q}w,XU
* (non-Javadoc) PJ$C$G
* !\'NBq,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #saK8; tp
*/ ='rSB.$Ctk
public void sort(int[] data) { @Yzdq\FI
int[] temp=new int[data.length]; >0XB7sC
mergeSort(data,temp,0,data.length-1); U-]Rm}X\M
} =P}BAJ
W~W`fm
private void mergeSort(int[] data, int[] temp, int l, int r) { k_,wa]ws$
int i, j, k; "J.7@\^ h/
int mid = (l + r) / 2; 7NQ@q--3s
if (l == r) ]'"aVGqa.
return; [\_#n5
if ((mid - l) >= THRESHOLD) 'L k&iph
mergeSort(data, temp, l, mid); ( M$2CL
else n "J+?~9
insertSort(data, l, mid - l + 1); !EwL"4pPw
if ((r - mid) > THRESHOLD) :Qc[>:N
mergeSort(data, temp, mid + 1, r); @3aI7U/I
else NP+*L|-;
insertSort(data, mid + 1, r - mid); C<G`wXlP|
M= ]]kJ:I
for (i = l; i <= mid; i++) { M"W~%
temp = data; $E >)
} Uo<iZ3J
for (j = 1; j <= r - mid; j++) { {e/6iSpT
temp[r - j + 1] = data[j + mid]; U=Hx&g
} Hyn*O)q!
int a = temp[l]; K|a^<| S
int b = temp[r]; ;:`0:Ao.
for (i = l, j = r, k = l; k <= r; k++) { 4tGP- L
if (a < b) { 6he (v
data[k] = temp[i++]; G+k~k/D6
a = temp; 1s"/R
} else { R3dt-v
data[k] = temp[j--]; Yw!(]8PYdU
b = temp[j]; >}I BPC
} Ho^rYz
} 2a,l;o$2&
} n){F FM
mh$Nwr/W:
/** `@tnEg
* @param data 3;E,B7,mQ
* @param l VV%Q "0\
* @param i 8am/5o
*/ =rL^^MZp
private void insertSort(int[] data, int start, int len) { ^#0k\f>_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h%=>iQ%enc
} Shag4-*@hi
} BKJwM'~
} J]"IT*-Ht
} %~{G*%:
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堆排序： ",Ge:\TR=
[BLBxSL
package org.rut.util.algorithm.support; cs\/6gSCo
S!JwF&EW
import org.rut.util.algorithm.SortUtil; 7O\sQ]i6
m Bc2x8g)
/** dH[TnqJn
* @author treeroot 2y;J 11\
* @since 2006-2-2 %fzZpd]v=,
* @version 1.0 D,( "3zx
*/ %Jb/HWC[
public class HeapSort implements SortUtil.Sort{ bAkCk]>5
O\z]1`i*o
/* (non-Javadoc) wU $j/~L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2<X.kM?N{B
*/ ?z/ )Hkw
public void sort(int[] data) { %9HL"
MaxHeap h=new MaxHeap(); $p?TE8G
h.init(data); C%LXGMt
for(int i=0;i h.remove(); p2)563#RS
System.arraycopy(h.queue,1,data,0,data.length); 4r+s" |
} &X%vp?p
F-&=N {+
private static class MaxHeap{ muZ6}&4
!J/fJW>m6
void init(int[] data){ 5;4bZ3e,0
this.queue=new int[data.length+1]; (imaL,M-D
for(int i=0;i queue[++size]=data; R{0nk
fixUp(size); 4],*y`& g
} 6$*\%
} =VFPZ
~MZEAY9
private int size=0; gd=gc<zYP
a}#8n^2
private int[] queue; D>>?8a
rd\:.
public int get() { ji] H|
return queue[1]; &X`zk
} LagHzCB
,+mH1#-3
public void remove() { rq]zt2
SortUtil.swap(queue,1,size--); #l<un<
fixDown(1); 9irT}e
} %j7HIxZh
file://fixdown mcgkNED
private void fixDown(int k) { lq[o2\
int j; UFOUkS F
while ((j = k << 1) <= size) { 3;t{V$
if (j < size %26amp;%26amp; queue[j] j++; WA1h|:Z
if (queue[k]>queue[j]) file://不用交换 (h$[g"8
break; Z H1UAf
SortUtil.swap(queue,j,k); Q}qw`L1
k = j; 9=FqI50{
} K|Kc.
} M0$wTmXM
private void fixUp(int k) { #eZm)KFQg
while (k > 1) { [i 7^a/e
int j = k >> 1; {%! >0@7
if (queue[j]>queue[k]) K>_~zWnc
break; |tVWmm^m
SortUtil.swap(queue,j,k); *F)+- BB
k = j; ]@G$L,3
} 552U~t
} )h>H}wDs
)i$:iI >k
} D$&LCW#x
Lo-\;%y
} iFBH;O_~
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SortUtil： (t%+Z"j
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package org.rut.util.algorithm; 3~5%6`
7LZA!3
import org.rut.util.algorithm.support.BubbleSort; I4RUXi 5
import org.rut.util.algorithm.support.HeapSort; |vVcO
import org.rut.util.algorithm.support.ImprovedMergeSort; |Js?@
import org.rut.util.algorithm.support.ImprovedQuickSort; V#-\ 4`c
import org.rut.util.algorithm.support.InsertSort; >mXq= 9L4
import org.rut.util.algorithm.support.MergeSort; M"l<::z
import org.rut.util.algorithm.support.QuickSort; wLW[Vur[
import org.rut.util.algorithm.support.SelectionSort; DM[gjfMXu
import org.rut.util.algorithm.support.ShellSort; 23|R $s>}i
?K9zTas@
/** l NhX)D^t
* @author treeroot \]$TBN dJ4
* @since 2006-2-2 $ytlj1.
* @version 1.0 {%PgR){qR
*/ {EL J!o[
public class SortUtil { |tua*zEsS
public final static int INSERT = 1; M s5L7S
public final static int BUBBLE = 2; Dc;zgLLL
public final static int SELECTION = 3; 78n`VmH~L
public final static int SHELL = 4; >/eV4ma"
public final static int QUICK = 5; %!HBPLk
public final static int IMPROVED_QUICK = 6; 4Y!_tZ>
public final static int MERGE = 7; 66jL2XU<
public final static int IMPROVED_MERGE = 8; HgfeSH
public final static int HEAP = 9; "(cMCBVYdA
E3`&W8
public static void sort(int[] data) { z($h7TZ$
sort(data, IMPROVED_QUICK); )(`HEl>-9c
} n+qa/<
private static String[] name={ J*}Qnl+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?loP18S b
}; F4$N:Jkl
s;NPY
private static Sort[] impl=new Sort[]{ XkE'k;AEx
new InsertSort(), Z.x9SEe1t
new BubbleSort(), @Z{!T)#}j
new SelectionSort(), %`b %TH^
new ShellSort(), XI8rU)q
new QuickSort(), tLc9-
new ImprovedQuickSort(), rV6SN.
new MergeSort(), blHJhB&8
new ImprovedMergeSort(), #OE]'k Ss
new HeapSort() < X&{6xu
}; } 0^wJs
Z<M?_<3
public static String toString(int algorithm){ ,{rm<M.)
return name[algorithm-1]; B$)&;Q
} B!iz=+RNC1
d4[mR~XXT
public static void sort(int[] data, int algorithm) { ^Ox|q_E w}
impl[algorithm-1].sort(data); LkA_M'G
} w]Byl3}Gt
R3\oLT4
public static interface Sort { a-(OAzQ_
public void sort(int[] data); HAOl&\)7"_
} hnD=DLW $
<-avC/M$d
public static void swap(int[] data, int i, int j) { /ltGSl
int temp = data; Gj9WUv[P
data = data[j]; N sNk
data[j] = temp; v$_YZm{!<
} :^H#i:4
} `zmjiC