[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; .DguR2KT
} Br5o7(AE
int i1=l; TDNf)Mm
int i2=mid+1; -rSIBc:$8
for(int cur=l;cur<=r;cur++){ 9V 0}d2d
if(i1==mid+1) 7G93,dJ
data[cur]=temp[i2++]; B_^]C9C|
else if(i2>r) edvFQ#,d
data[cur]=temp[i1++]; nJZ6? V
else if(temp[i1] data[cur]=temp[i1++]; u\1>gDI)|
else 1||+6bRP
data[cur]=temp[i2++]; +K~NV?c
} {1-V]h.<J
} $uh z
}#`:Qb \U
} K@u&(}
y\c"b-lQX
改进后的归并排序: `BY&>WY[
p9qKLJ*.C
package org.rut.util.algorithm.support; Ykqyk')wm
9X}I>
import org.rut.util.algorithm.SortUtil; [A2`]CE<@
=L-I-e97@
/** ZcE_f>KV
* @author treeroot ,!#ccv+Vm%
* @since 2006-2-2 ?]O7Ao
* @version 1.0 h9s >LY
*/ ,'fxIO
public class ImprovedMergeSort implements SortUtil.Sort { EbY,N:LK
D=r))
private static final int THRESHOLD = 10; 39i9wrP
B4Y(?JTx
/* G$M9=@Ug
* (non-Javadoc) GW^,g@%C
* nY%5cJ`"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z|lU8`'5
*/ iq$$+y,
public void sort(int[] data) { Z.PBu|Kx
int[] temp=new int[data.length]; 'tgKe!-@
mergeSort(data,temp,0,data.length-1); cre;P5^E
} }_'IE1bA
LNYKm~cN
private void mergeSort(int[] data, int[] temp, int l, int r) { r,1e 'd:
int i, j, k; YZf6|
int mid = (l + r) / 2; feM6K!fL`
if (l == r) kRJ4-n^@><
return; =T?}Nt
if ((mid - l) >= THRESHOLD) /1UOT\8U
mergeSort(data, temp, l, mid); hwYQGtjF
else 9pn>-1NJ
insertSort(data, l, mid - l + 1); xM>W2
if ((r - mid) > THRESHOLD) 1Na@|yY
mergeSort(data, temp, mid + 1, r); +n0r0:z0
else "I6P=]|b
insertSort(data, mid + 1, r - mid); HSUI${<
2&mGT&HAVA
for (i = l; i <= mid; i++) { N?Q+>
temp = data; *D}0[|O
} `>Tu|3%\
for (j = 1; j <= r - mid; j++) { $``1PJoi
temp[r - j + 1] = data[j + mid]; !^#jwRpeN
} ^FmU_Q0
int a = temp[l]; {6;9b-a]
int b = temp[r]; H<hVTc{K
for (i = l, j = r, k = l; k <= r; k++) { OVzt\V*+%W
if (a < b) { C&LBr|
data[k] = temp[i++]; GG064zPq7
a = temp; mYN7kYR}<`
} else { N[]Hc
data[k] = temp[j--]; ='ZRfb&
b = temp[j]; h+p*=|j`
} O4\Z!R60g
} c .3ZXqpI;
} S1Z2_V
TNCgaTJ{h
/** '|]e<Mt-
* @param data ?_x q-
* @param l Amr[wx
* @param i 8KB>6[H!wE
*/ <?-YTY|
private void insertSort(int[] data, int start, int len) { XZ&KR.C,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~CB[9D=
} ;{i'#rn{
} (Fq5IGs
} }I|u'#n_
} hT$~ygQ
9CA^B2u
堆排序： 1c3TN#|)W
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package org.rut.util.algorithm.support; !CXt*/~
[Vd[-
import org.rut.util.algorithm.SortUtil; IDkWGh
t*@2OW`!
/** Q~R ~xz
* @author treeroot 'O5'i\uz
* @since 2006-2-2 /? r?it
* @version 1.0 #-pc}Y|<
*/ mRB
public class HeapSort implements SortUtil.Sort{ mj|)nOd
SH*C"
/* (non-Javadoc) +!QJTn"3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "UEv&mQ
*/ g{W;I_P^9
public void sort(int[] data) { iA8U Yd3Q
MaxHeap h=new MaxHeap(); uOa26kE4
h.init(data); R'kyrEO
for(int i=0;i h.remove(); DI!V^M[~u
System.arraycopy(h.queue,1,data,0,data.length); c/B'jPt
} v9Xp97J2
&/Ro lIHF
private static class MaxHeap{ 4iW'kuK
XU+<?%u}z
void init(int[] data){ !LkWzn3
this.queue=new int[data.length+1]; nW;g28
for(int i=0;i queue[++size]=data; n@ w^V
fixUp(size); 8q1wHZ
} rr#K"SP
} 8/0Y vh
G_>#Js
private int size=0; "V&+7"Q
hJzxbr <
private int[] queue; ^F:k3,_[
AfG/JWSo}
public int get() { #Rg|BfV-
return queue[1]; j5 g# M
} vD 5vbl
%pXAeeSY`;
public void remove() { TYI7<-Mp:[
SortUtil.swap(queue,1,size--); s?ko?qN(
fixDown(1); 7\ nf:.
} S(\9T1DVe
file://fixdown C/(M"j M
private void fixDown(int k) { U^qt6$bK
int j; "B_K XL
while ((j = k << 1) <= size) { l2;CQ7
if (j < size %26amp;%26amp; queue[j] j++; M-i_#EWP
if (queue[k]>queue[j]) file://不用交换 !"+'A)Nve
break; bFA!=uvA
SortUtil.swap(queue,j,k); N{-]F|XX
k = j; ~tOAT;g}q
} ORu2V#Z[
} P>9aI/d9
private void fixUp(int k) { y>*xVK{D
while (k > 1) { M>M`baM1
int j = k >> 1; 8u!"#S#>a
if (queue[j]>queue[k]) Jv.UQ
break; "bDs2E+W
SortUtil.swap(queue,j,k); P;pl,~
k = j; !~Q2|r
} au,t%8AC
} JoSJH35=:
y<b{Ji e
} hK<5KZ/4
e)E$}4
} R0oKbs{
#$3yz'"QF
SortUtil： r[?1
tl'n->G>v
package org.rut.util.algorithm; qH['09/F6
N25V]
import org.rut.util.algorithm.support.BubbleSort; "(qw-kil
import org.rut.util.algorithm.support.HeapSort; Zs<KZGn-B
import org.rut.util.algorithm.support.ImprovedMergeSort; GJqE!I,.
import org.rut.util.algorithm.support.ImprovedQuickSort; HNL42\Kz!
import org.rut.util.algorithm.support.InsertSort; ]:34kE}e5
import org.rut.util.algorithm.support.MergeSort; uytE^
import org.rut.util.algorithm.support.QuickSort; R-^96fFBy
import org.rut.util.algorithm.support.SelectionSort; K!,<7[MBg
import org.rut.util.algorithm.support.ShellSort; W-/}q0h
7^T^($+6s&
/** 6=N`wi
* @author treeroot XR!us/U`a
* @since 2006-2-2 ZIdA\_c
* @version 1.0 d,$d~alY
*/ -X+H2G
public class SortUtil { ?JxbSK#
public final static int INSERT = 1; {)AMwq
public final static int BUBBLE = 2; P9T5L<5
public final static int SELECTION = 3; Mc!Xf[
public final static int SHELL = 4; $4MrP$4TI
public final static int QUICK = 5; -l}IZY
public final static int IMPROVED_QUICK = 6; l]<L [Y,E-
public final static int MERGE = 7; (RtueEb.~E
public final static int IMPROVED_MERGE = 8; ;60.l!
public final static int HEAP = 9; N$[$;Fm:
gT/@dVV
public static void sort(int[] data) { [yj).*0
sort(data, IMPROVED_QUICK); ^*~;k|;&
} KgN)JD>
private static String[] name={ hm<}p&!J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hp"L8w
}; 'Peni1_
(Z5##dS3
private static Sort[] impl=new Sort[]{ M/Pme&%
new InsertSort(), ! Q<>3xZ
new BubbleSort(), 5<L_|d)0"
new SelectionSort(), &uUo3qXQ5l
new ShellSort(), 2&Nb
new QuickSort(), a}SdW
new ImprovedQuickSort(), Jgu94.;5
new MergeSort(), m`6Yc:@E
new ImprovedMergeSort(), wW?,;B'74
new HeapSort() .Wi{lt
}; r6'UUu
|#l=
public static String toString(int algorithm){ Q !qrNa6
return name[algorithm-1]; L!_ZY
} Jx#k,Z4
HyiFy7j
public static void sort(int[] data, int algorithm) { >!6i3E^
impl[algorithm-1].sort(data); ,@z4I0cTi\
} n]+W 3[i
vILy>QS)
public static interface Sort { t?nX=i*~]
public void sort(int[] data); D\/xu-&
} 3\;27&~gV
:ug4g6;#H0
public static void swap(int[] data, int i, int j) { $N2SfyX7
int temp = data; KNgH|5Pb
data = data[j]; @xsCXCRWVV
data[j] = temp; *]JdHO
} Ch )dLPz@
} \RQ='/H*