[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; 1'g?B`
} (V+(\<M
int i1=l; w S;(u[W
int i2=mid+1; |{_%YM($
for(int cur=l;cur<=r;cur++){ 5]F9o9]T
if(i1==mid+1) PC3wzJ\\S
data[cur]=temp[i2++]; #AY+[+
else if(i2>r) S^n:O
data[cur]=temp[i1++]; wF&\@H
else if(temp[i1] data[cur]=temp[i1++]; !.F\v.
else 8CYJR/
data[cur]=temp[i2++]; 4o|~KX8Qz
} $4L=Dg
} ^L[Z+7|
jQ[Z*^"}
} 7kb`o y;(^
ZHB'^#b
改进后的归并排序: * T~sR'K+|
ilNm\fQ.
package org.rut.util.algorithm.support; ~PV>3c3l=
u}$U|Cw-;T
import org.rut.util.algorithm.SortUtil; jLEU V
=N3~2=g~A
/** G3e%~
* @author treeroot ^ZV xBQKg
* @since 2006-2-2 ;Lu}>.t
* @version 1.0 9\"~G)
*/ 6HEl1FK{@
public class ImprovedMergeSort implements SortUtil.Sort { &hF>}O
mg3jm
private static final int THRESHOLD = 10; ~ PPGU1
E O}(MXS
/* ^oP]@r"qy
* (non-Javadoc) @emZwN"m
* *yJb4uALB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gVuN a)
*/ =CJs&Qa2
public void sort(int[] data) { k20H|@g2
int[] temp=new int[data.length]; 8G@FX $$Q
mergeSort(data,temp,0,data.length-1); [6D>2b}:{[
} )XNcy"
$iB(N ZV
private void mergeSort(int[] data, int[] temp, int l, int r) { q&wMp{
int i, j, k; 5jV]{ZV#
int mid = (l + r) / 2; T xN5K`q
if (l == r) !YoKKG~_0
return; 7eq;dNB@gq
if ((mid - l) >= THRESHOLD) . XY'l
mergeSort(data, temp, l, mid); $)uQ%/DH>
else E+>;tLw3j
insertSort(data, l, mid - l + 1); jALo;PDJ
if ((r - mid) > THRESHOLD) `q/y|/v<
mergeSort(data, temp, mid + 1, r); im?nR+t+X
else g)"6|Z?D"
insertSort(data, mid + 1, r - mid); ,cB`j7p(
n^A=ar.
for (i = l; i <= mid; i++) { AfY(+w6!K
temp = data; :@p`E}1r{
} nd?m+C&W
for (j = 1; j <= r - mid; j++) { .p5*&i7
temp[r - j + 1] = data[j + mid]; <^&'r5H
} sO*6F`eiZ
int a = temp[l]; HY42G#^
int b = temp[r]; @<AIPla
for (i = l, j = r, k = l; k <= r; k++) { '|+_~ZO*d
if (a < b) { =GpLlJ`-
data[k] = temp[i++]; PK~okz4b
a = temp; EYQ!ELuF
} else { K;Xn!:) V:
data[k] = temp[j--]; E6G^?k~q
b = temp[j]; 0|U<T#t8?
} Oe=,-\&_
} A/.cNen
} j9,X.?Xvx
|)lo<}{
/** Tu"yoF
* @param data m760K*:i\
* @param l PF+`3
* @param i q8p 'bibY
*/ FqiK}K.~/
private void insertSort(int[] data, int start, int len) { jVA xa|S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <ImeZ'L7
} qzG'Gz{{qu
} :')<|(Zy
} D?E5p.!A
} Wl,yznT
S}|ea2
堆排序： a( qw
G%P]qi
package org.rut.util.algorithm.support; 'dg OE
C/cyqxVl}
import org.rut.util.algorithm.SortUtil; c=K M[s.
4Pt0^;H&jn
/** V2bod=&Lc
* @author treeroot ~:0h o
* @since 2006-2-2 .=NK^
* @version 1.0 I7TMv.
*/ W}e5 4-lu
public class HeapSort implements SortUtil.Sort{ `j2z=5
6m{3GKaW~
/* (non-Javadoc) 63~i6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \ pq]q
*/ \gzNMI*
public void sort(int[] data) { g_q{3PW.
MaxHeap h=new MaxHeap(); HS2)vd@)
h.init(data); )oNomsn
for(int i=0;i h.remove(); &oR&NKk
System.arraycopy(h.queue,1,data,0,data.length); Qejzp/2
} yZ2,AR%
MdPwuXI
private static class MaxHeap{ 2{%BQq>C
ugL$W@
void init(int[] data){ >sP;B5S
this.queue=new int[data.length+1]; 3}vlj:L
for(int i=0;i queue[++size]=data; DS^Q0 f
fixUp(size); `,|7X]%b
} 5H5<ft,
} dW=]|t&
%>s y`c
private int size=0; ]02V,'x
._nhW*
private int[] queue; }X`K3sk2/z
.$r(":A#)
public int get() { S5XFYQ
return queue[1]; .z9JoQ
} [[)HPHSQ
|5W u0T
public void remove() { 5zUD W?
SortUtil.swap(queue,1,size--); ;\H2U.
fixDown(1); -W oZwqh
} 'Kq%tM26!
file://fixdown &^Xm4r%u_
private void fixDown(int k) { `fL$t0"
int j; Ms$kL'/
while ((j = k << 1) <= size) { sQ_{zOUPh
if (j < size %26amp;%26amp; queue[j] j++; zi5;>Iv0}
if (queue[k]>queue[j]) file://不用交换 TN0dfba[
break; avT>0b:
SortUtil.swap(queue,j,k); U_!6pqFc
k = j; {:? -)Xq
} =A,i9Z&
} S |B7HS5
private void fixUp(int k) { >Rr]e`3wG
while (k > 1) { LsLsSV
int j = k >> 1; jKtbGVZ7r
if (queue[j]>queue[k]) VfQSfNsi
break; /2YI!U@A
SortUtil.swap(queue,j,k); -dza_{&+iZ
k = j; b,!h[
} g.veHh|;_
} w+JDu_9+A]
{? 6]_J
} .-o$IQsS
:_vf1>[
} g{i(4DHm(
[WB8X,
SortUtil： \Q &Kd|
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package org.rut.util.algorithm; ,H|V\\
Iz ,C!c
import org.rut.util.algorithm.support.BubbleSort; \oaO7w,:"
import org.rut.util.algorithm.support.HeapSort; yDHH05Yl
import org.rut.util.algorithm.support.ImprovedMergeSort; p( z.[
import org.rut.util.algorithm.support.ImprovedQuickSort; [rf.P'p%
import org.rut.util.algorithm.support.InsertSort; {>syZZ,h
import org.rut.util.algorithm.support.MergeSort; HtXzMSGo7
import org.rut.util.algorithm.support.QuickSort; $cYh X^YG.
import org.rut.util.algorithm.support.SelectionSort; :V >Z|?[*H
import org.rut.util.algorithm.support.ShellSort; Q.!D2RZc
6 s*#y[$
/** =i `o+H
* @author treeroot oo/#]a
* @since 2006-2-2 aiz_6@Qfz*
* @version 1.0 ;]'mx
*/ }PoB`H'K5
public class SortUtil { G"C'/
public final static int INSERT = 1; o8Tt|Lxb$8
public final static int BUBBLE = 2; QV" |
public final static int SELECTION = 3; p6sXftk
public final static int SHELL = 4; k3u3X~u
public final static int QUICK = 5; /9i2@#J}W1
public final static int IMPROVED_QUICK = 6; 38rC; 6
public final static int MERGE = 7; teET nz_L
public final static int IMPROVED_MERGE = 8; N 0`)WLW
public final static int HEAP = 9; 2'N%KKmJL
B1\}'g8%f
public static void sort(int[] data) { Yz[^?M%(D
sort(data, IMPROVED_QUICK); IY+P Yad
} +$P0&YaQ
private static String[] name={ n)[{nkS6[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )f,iey\-
}; }+,;wj~
0>>tdd7
private static Sort[] impl=new Sort[]{ ](B+ilr
new InsertSort(), 7hQrL+%q8
new BubbleSort(), r IY_1
new SelectionSort(), |tyVC=${
new ShellSort(), Fq9AO~z
new QuickSort(), 4y:yFTp
new ImprovedQuickSort(), Koo%mr
new MergeSort(), `cCsJm$V"
new ImprovedMergeSort(), }c^`!9
new HeapSort() &pV'/
}; RlC|xj"l%
O*X]oX
public static String toString(int algorithm){ MoavA 3`
return name[algorithm-1]; ljQru ^(u
} KP%A0
~CQsv`
public static void sort(int[] data, int algorithm) { /n&w|b%
impl[algorithm-1].sort(data); G D$o|l]\
} up#W"`"
GMrjZ
public static interface Sort { B&VruOP0
public void sort(int[] data); ~4<xTP\*
} >2tYw,m
!T!U@e=u
public static void swap(int[] data, int i, int j) { xhWWl(r`5
int temp = data; :H@Q`g u
data = data[j]; RNiFLD%5
data[j] = temp; wa5wkuS)ld
} 7'LKyy !"3
} WRe9ki=R