[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; &W\e 5X<A
} xrf|c
int i1=l; [U&k"s?
int i2=mid+1; Y/sav;
for(int cur=l;cur<=r;cur++){ jj{:=lZB
if(i1==mid+1) f Fi=/}
data[cur]=temp[i2++]; Qw0k-t0=4
else if(i2>r) Cff6EE
data[cur]=temp[i1++]; *y4DK6OFe
else if(temp[i1] data[cur]=temp[i1++]; xm{?h,U,
else P.Ntjz/B
data[cur]=temp[i2++]; 9K$ x2U
} zqA>eDx
} HhynU/36
^(q .f=I!a
} QD-\'Bp/X
mnA_$W3~I
改进后的归并排序: S)EF&S(TC
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package org.rut.util.algorithm.support; sVh)Ofn
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import org.rut.util.algorithm.SortUtil; bc(MN8b]j
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/** Zf$mwRS[_
* @author treeroot :Racu;xf
* @since 2006-2-2 3eUi9_s+
* @version 1.0 )<QX2~m<
*/ ~>@~U]
public class ImprovedMergeSort implements SortUtil.Sort { -8)Hulo/{U
ef'kG"1
private static final int THRESHOLD = 10; /`M#
e#oK% {A
/* ;r@=[h
* (non-Javadoc) 7&id(&y/
* ,1I-%6L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;pm/nu
*/ N^QxqQ~
public void sort(int[] data) { LuZlGm
int[] temp=new int[data.length]; t^&hG7L_m,
mergeSort(data,temp,0,data.length-1); l;q]z
} ]Gi&:k
'-"[>`[q
private void mergeSort(int[] data, int[] temp, int l, int r) { ~7b#BXzP
int i, j, k; oaj.5hM
int mid = (l + r) / 2; NnAIL;WS
if (l == r) (VO'Kd
return; Z(q]rX5"
if ((mid - l) >= THRESHOLD) ]aIHd]B
mergeSort(data, temp, l, mid); _)j\ b
else JL {H3r&/S
insertSort(data, l, mid - l + 1); {+lU4u
if ((r - mid) > THRESHOLD) s17)zi,?4
mergeSort(data, temp, mid + 1, r); "`;-5dg
else LGc8w>qE
insertSort(data, mid + 1, r - mid); ]\rQ{No
(&.T
for (i = l; i <= mid; i++) { *C55DO^w
temp = data; mx)!]B"
} %oqKpD+
for (j = 1; j <= r - mid; j++) { Ko&4{}/
temp[r - j + 1] = data[j + mid]; 1V]ws}XW
} GG%;~4#2
int a = temp[l]; P<>NV4
int b = temp[r]; &j~9{ C
for (i = l, j = r, k = l; k <= r; k++) { f@`|2wG
if (a < b) { /SJ><
data[k] = temp[i++]; N4x5!00
a = temp; 8pEA3py
} else { `Hw][qy#
data[k] = temp[j--]; G+fo'ThG
b = temp[j]; [Q:mq=<Z%
} =oVC*b
} &yP|t":HWX
} $%$zZJ@/
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/** Hya.OW{
* @param data |fyzb=Lg
* @param l I:t?#)wl
* @param i ^/2HH
*/ gdCit-3
private void insertSort(int[] data, int start, int len) { H*G(`Zl}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }bRn&)e
} ITl>HlS
} p9jC-&:
} (Q*x"G#4>
} WZ`i\s1#
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堆排序： R1SFMI
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package org.rut.util.algorithm.support; E!ZLVR.K
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import org.rut.util.algorithm.SortUtil; oAifM1*0
onmpMU7w
/** Cgln@Rz
* @author treeroot (Zx--2lc
* @since 2006-2-2 q~#>MB}".
* @version 1.0 /t`|3Mw
*/ e<uf)K=(C
public class HeapSort implements SortUtil.Sort{ 0,-]O=
X9PbU1o;
/* (non-Javadoc) )a0l:jEOc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;HAvor=?
*/ Q\zaa9P
public void sort(int[] data) { %7-(c
MaxHeap h=new MaxHeap(); ;ZuHv {=
h.init(data); xtCMK1# x
for(int i=0;i h.remove(); J;<dO7j5
System.arraycopy(h.queue,1,data,0,data.length); fn/?I\
} s#<fj#S
t{B@k[|
private static class MaxHeap{ Z^Um\f
Z796;qk
void init(int[] data){ u[KxI9Q
this.queue=new int[data.length+1]; >VZxDJ$R
for(int i=0;i queue[++size]=data; v.*fJ
fixUp(size); $@kOMT
} <BT18u\
} Kn3Xn`P?
R`$Y]@i&B
private int size=0; CAx$A[f<
W%5))R$
private int[] queue; I*j~5fsS'
_QHk&-Lp
public int get() { [>>_%T\I
return queue[1]; oQpGa>6U&
} )?OdD7gd
Kg~D~ +j
public void remove() { QuMv1)n
SortUtil.swap(queue,1,size--); G>:v1lde
fixDown(1); uX!6:v]
} O13]H"O_
file://fixdown {/)i}V#RE
private void fixDown(int k) { vN v'%;L
int j; H!0m8LCnb
while ((j = k << 1) <= size) { Z&?4<-@6\p
if (j < size %26amp;%26amp; queue[j] j++; l z"o( %D
if (queue[k]>queue[j]) file://不用交换 %CYo, e
break; pRh9+1EM;
SortUtil.swap(queue,j,k); o"0~
k = j; /Z]nV2$n)V
} 1P"{TMd?
} QKEtV
private void fixUp(int k) { T^MY w
while (k > 1) { \IC^z
int j = k >> 1; &Jb$YKt
if (queue[j]>queue[k]) IhK SwT
break; |5`ecjb.
SortUtil.swap(queue,j,k); q2F`q. j
k = j; Lp"OXJ*es
} IO&U=-pn&
} $?!]?{K
?7)v:$(G}
} %Iflf]l
"oiN8#Hf
} _vb'3~'S
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SortUtil： qT$IV\;_
yogL8V-^4
package org.rut.util.algorithm; *w.":\P]
,]ySBAO
import org.rut.util.algorithm.support.BubbleSort; OY(CB(2N
import org.rut.util.algorithm.support.HeapSort; <K&A/Ue
import org.rut.util.algorithm.support.ImprovedMergeSort; ^HR8.9^[1u
import org.rut.util.algorithm.support.ImprovedQuickSort; M]k Q{(
import org.rut.util.algorithm.support.InsertSort; xMQ>,nZ
import org.rut.util.algorithm.support.MergeSort; At[Q0'jkc
import org.rut.util.algorithm.support.QuickSort; |*w)]2Bl
import org.rut.util.algorithm.support.SelectionSort; :zo5`[P
import org.rut.util.algorithm.support.ShellSort; 1yz%ud-l
9[X'9*,
/** .czUJyFms}
* @author treeroot 2<OU)rVE4
* @since 2006-2-2 y@$E5sz
* @version 1.0 l="X|t
*/ dHiir&Rd9`
public class SortUtil { 4x-,l1NMR
public final static int INSERT = 1; K%L6UQ;
public final static int BUBBLE = 2; ^S;{;c+'
public final static int SELECTION = 3; Qp[ Jw?a
public final static int SHELL = 4; 4Zu1G#(zP
public final static int QUICK = 5; @i(9k
public final static int IMPROVED_QUICK = 6; 451.VI}MR
public final static int MERGE = 7; 68bvbig
public final static int IMPROVED_MERGE = 8; V;RgO}
public final static int HEAP = 9; NTX0vQG
&d6ud|
public static void sort(int[] data) { h*y+qk-!\g
sort(data, IMPROVED_QUICK); $Yu'B_E6p
} gloG_*W
private static String[] name={ |uz<)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <Qv/# k
}; \reVA$M[
1E||ft-1i*
private static Sort[] impl=new Sort[]{ XRkUv>Yk
new InsertSort(), q,#s m'S
new BubbleSort(), G Wa6FX:/
new SelectionSort(), "1a!]45+
new ShellSort(), 'ParMT
new QuickSort(), 8Uh|V&
new ImprovedQuickSort(), SD*q+Si,1U
new MergeSort(), PHT<]:"`<
new ImprovedMergeSort(), 'l!\2Wv2
new HeapSort() l,Y5VGiH#
}; Wk3-J&QbS
2brY\c F
public static String toString(int algorithm){ r{d@74
return name[algorithm-1]; CeOA_M
} Go:(R {P
S9$,.aq
public static void sort(int[] data, int algorithm) { 3)CIqN
impl[algorithm-1].sort(data); aynaV
} E<! L^A M`
=AzkE]
public static interface Sort { 05HCr"k
public void sort(int[] data); GK,{$SC+=
} PX^k;
uUHWTyoO
public static void swap(int[] data, int i, int j) { (i(E~^O
int temp = data; n7~3~i`D;
data = data[j]; t>%b[(a
data[j] = temp; IFr"IOr'l
} mT@Gf>}/A
} 9&zR i