[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; [0Xuo
} $]LS!@ Rm
int i1=l; vEfj3+e
int i2=mid+1; N'y<<tTA
for(int cur=l;cur<=r;cur++){ K#k/t"r
if(i1==mid+1) #H7 SLQr\
data[cur]=temp[i2++]; LZ)g&A(j?
else if(i2>r) 7@"X?uo%o
data[cur]=temp[i1++]; :WRD<D_4
else if(temp[i1] data[cur]=temp[i1++]; d*|RFU
else }36AeJ7L
data[cur]=temp[i2++]; i1x4$}
} $*eYiz3Ue
} ~+{*KPiD
Y-})/zFc
} /}1|'?P
{-I+
改进后的归并排序: uNI&U7_"
$W|JQ h
package org.rut.util.algorithm.support; G$a@}9V
_ uOi:Ti
import org.rut.util.algorithm.SortUtil; V06*qQ[
Aq(cgTNW
/** }-:B`:K&
* @author treeroot 6)sKg{H
* @since 2006-2-2 W!HjO;
* @version 1.0 @Nb/n
*/ 3~fi#{
public class ImprovedMergeSort implements SortUtil.Sort { Z4G%Ve[
}eSy]r[J
private static final int THRESHOLD = 10; ^;/~$
k% \;$u=%
/* a)W|gx6Y
* (non-Javadoc) dlvU=^G#G
* _f2rz+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JjZB!Lg=
*/ T x Mh_
public void sort(int[] data) { gwIR3u
int[] temp=new int[data.length]; .pZYPKMaE
mergeSort(data,temp,0,data.length-1); Up%XBA
} P4)Q5r
}s?3
private void mergeSort(int[] data, int[] temp, int l, int r) { .4ww5k>
int i, j, k; 6v{&,q
int mid = (l + r) / 2; [&~x5l 8\C
if (l == r) x]YzVJ=Y
return; YCP D+
if ((mid - l) >= THRESHOLD) Ib{#dhV
mergeSort(data, temp, l, mid); \x$`/
else v9J1Hha#
insertSort(data, l, mid - l + 1); -`ljKp
if ((r - mid) > THRESHOLD) \6GNKeN
mergeSort(data, temp, mid + 1, r); B{0]v-w
else W`LG.`JW
insertSort(data, mid + 1, r - mid); { #B/4
851BOkRal4
for (i = l; i <= mid; i++) { % dFz[b
temp = data; N/lEfy<&g:
} R%LFFMVn
for (j = 1; j <= r - mid; j++) { <9H3d7%
temp[r - j + 1] = data[j + mid]; Xqe Qj}2kA
} }x$@j
int a = temp[l]; {pi_yr3
int b = temp[r]; QNE/SSL
for (i = l, j = r, k = l; k <= r; k++) { 1r4NP
if (a < b) { f3,LX]zKA
data[k] = temp[i++]; D',7T=C
a = temp; )Dms9:
} else { K_t >T)K
data[k] = temp[j--]; l %zbx"%x
b = temp[j]; \+Qd=,!i(
} (e_p8[x
} [V /f{y~{
} <Ed;tq
GLub5GrxR
/** @)MG&X
* @param data d|87;;X|u
* @param l Xa-TNnws?
* @param i [ZG>FJDl8
*/ N?S;v&q+
private void insertSort(int[] data, int start, int len) { t?^!OJ:L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q<szH1-
} $uwz`N:
} #v$wjqK5
} TSJeS`I
} 1foG*
4uE)*1
堆排序： |gk4X%o6
hb0)<^xu
package org.rut.util.algorithm.support; m' j1
OP=oSfa
import org.rut.util.algorithm.SortUtil; %Y/;jCY
[T'[7Z
/** pi70^`@'B
* @author treeroot K)1Lg?j
* @since 2006-2-2 Z9h4 pd
* @version 1.0 $B9?>a|{A
*/ s7jNRY V
public class HeapSort implements SortUtil.Sort{ 37IHn6r\
r.u\qPT&
/* (non-Javadoc) K5<2jl3S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2ZbSdaM=
*/ $zhvI*0
public void sort(int[] data) { jpXbFWgN
MaxHeap h=new MaxHeap(); -=lL{oB1
h.init(data); <AJRU l
for(int i=0;i h.remove(); $t6t 6<M)
System.arraycopy(h.queue,1,data,0,data.length); SMd[*9l [
} R:'&>.AUw
\Lbwfd=
private static class MaxHeap{ %PPy0RZ^
7N5M=f.DS(
void init(int[] data){ p.MLKp-'
this.queue=new int[data.length+1]; 2=<,#7zlJ
for(int i=0;i queue[++size]=data; T1?9E{bC8A
fixUp(size); Jv%)UR.]
} [P6A$HC<
} 5yJ~ q
cN2Pl%7
private int size=0; QYj 4D
xrlyph5mE
private int[] queue; qauvwAMuX
Q?>*h xzoP
public int get() { o8A8fHl
return queue[1]; )-iUUak
} S,'ekWVD
AjO{c=d
public void remove() { ht+wi5b
SortUtil.swap(queue,1,size--); 8MU7|9 Q
fixDown(1); 6/'X$}X
} 3fE0cVG*
file://fixdown juu"V]Q1
private void fixDown(int k) { @.dM1DN)
int j; LF(S"Of
while ((j = k << 1) <= size) { OzH\YN
if (j < size %26amp;%26amp; queue[j] j++; ^4[QX -_2
if (queue[k]>queue[j]) file://不用交换 ljg6uz1v%
break; +,i_G?eX
SortUtil.swap(queue,j,k); W=#jtU`:5
k = j; }`2+`w%uZ
} Ir- 1@_1Q
} V6Of(;r
private void fixUp(int k) { A-^B?E
while (k > 1) { _?$')P|
int j = k >> 1; a@? Bv
if (queue[j]>queue[k]) UpiZd/K
break; >Fe=PRs
SortUtil.swap(queue,j,k); wSALK)T1{
k = j; a94nB
} ~X;sa,)L1+
} ,z((?h,nm
'&]6(+I>
} 27F:-C~.9
,yfJjV*I
} Ghe@m6|D
O=u.J8S2
SortUtil： +\vN#xDz
20Rm|CNH?
package org.rut.util.algorithm; #S|On[Q!
MGo`j:0
import org.rut.util.algorithm.support.BubbleSort; L'"od;(6R
import org.rut.util.algorithm.support.HeapSort; k6;pi=sYNW
import org.rut.util.algorithm.support.ImprovedMergeSort; I wu^@
import org.rut.util.algorithm.support.ImprovedQuickSort; Ax4;[K\Q
import org.rut.util.algorithm.support.InsertSort; 1u* (=!
import org.rut.util.algorithm.support.MergeSort; E/d\ebX|
import org.rut.util.algorithm.support.QuickSort; Lf Y[Z4
import org.rut.util.algorithm.support.SelectionSort; 8nSw7:z
import org.rut.util.algorithm.support.ShellSort; |fn%!d`2
<1U *{y
/** n8&x=Z}Xs
* @author treeroot MR* %lZpB
* @since 2006-2-2 hSk
* @version 1.0 n+'s9
*/ L\t!)X-4
public class SortUtil { uVw|jj
public final static int INSERT = 1; sgB|2cj;j
public final static int BUBBLE = 2; :O*62olC5
public final static int SELECTION = 3; z)*\njYe
public final static int SHELL = 4; H|cxy?iJ
public final static int QUICK = 5; m&Y?]nbq
public final static int IMPROVED_QUICK = 6; d5=yAn-+=
public final static int MERGE = 7; (=s%>lW|
public final static int IMPROVED_MERGE = 8; DEenvS`,P
public final static int HEAP = 9; cdfnM%`>\
V##TG0
public static void sort(int[] data) { ,\PTn7_
sort(data, IMPROVED_QUICK); <)gTi759h)
} xQzXl
private static String[] name={ @N\ Ht'f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" []H0{a2{<
}; 42 rIIJ1A
U9//m=_
private static Sort[] impl=new Sort[]{ ,j[1!*Z_[
new InsertSort(), 5S #6{Y =
new BubbleSort(), i#Fe`Z ~J
new SelectionSort(), l37l| xp~
new ShellSort(), #Xun>0
new QuickSort(), *18J$
new ImprovedQuickSort(), TfA;4^
new MergeSort(), 6IL-S%EGK1
new ImprovedMergeSort(), {?uswbk.
new HeapSort() 3T@`VFbE
}; UeSPwY
$K!6T
public static String toString(int algorithm){ d#HN'(2t
return name[algorithm-1]; z%/<|` 7
} h&IF?h
A@I3:V
public static void sort(int[] data, int algorithm) { G4,BcCPQ
impl[algorithm-1].sort(data); g_MxG!+(V
} ch0x*[N@
9h^TOZK)
public static interface Sort { r Ww.(l
public void sort(int[] data); RS Vt
} 259:@bi!y
lJBZ0
public static void swap(int[] data, int i, int j) { ;UWp0d%
int temp = data; KU;m.{
data = data[j]; M cbiO)@I
data[j] = temp; 6NzS<
} AKKVd% P(
} /d1V&Lj