[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; "P)f,n
} EZy:_xjZ
int i1=l; l<5@a (
int i2=mid+1; KMO(f!?
for(int cur=l;cur<=r;cur++){ +gZg7]!Z
if(i1==mid+1) ;JM%O8
data[cur]=temp[i2++]; Hc`)Q vFRW
else if(i2>r) m0}Pq{g
data[cur]=temp[i1++]; X]^FHYjhS
else if(temp[i1] data[cur]=temp[i1++]; OAoTsqj6
else &cnciEw1
data[cur]=temp[i2++]; L*a:j
} td*1
} P9Yee!*H
T5* t~`bfU
} [D!-~]5
O$F<x,
改进后的归并排序: =Q\z*.5j.
BE`{? -G
package org.rut.util.algorithm.support; i2. +E&3v
}HO3D.HE^
import org.rut.util.algorithm.SortUtil; }I3 ZNd
?T]` X
/** =<,>dBs}\
* @author treeroot RO>3U2
* @since 2006-2-2 }e/#dMEi
* @version 1.0 m<7Ax>
*/ ZDMv8BP7
public class ImprovedMergeSort implements SortUtil.Sort { OVwcjhQ
Mnj\t3:
private static final int THRESHOLD = 10; 4RPc&%
$ z4JUr!m
/* <ttrd%VW
* (non-Javadoc) ( (.b&
* =t[hsl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OZDd
*/ MHl ffj
public void sort(int[] data) { EESGU(
int[] temp=new int[data.length]; g8=j{]~C
mergeSort(data,temp,0,data.length-1); .A(QqL>
} ??\1eo2gB
^("23mhfJ
private void mergeSort(int[] data, int[] temp, int l, int r) { Z2Q'9C},m
int i, j, k; {RG4m{#9
int mid = (l + r) / 2; c@eQSy
if (l == r) QcW6o,
return; Ly\ `
if ((mid - l) >= THRESHOLD) E#?Bn5-uBs
mergeSort(data, temp, l, mid); t@#+vs@
else [-ONs
insertSort(data, l, mid - l + 1); w^{qut.
if ((r - mid) > THRESHOLD) ,,FO6+4f
mergeSort(data, temp, mid + 1, r); Ch] `@(l
else bD2):U*Fzo
insertSort(data, mid + 1, r - mid); dBWi1vTF
cDkq@H:
for (i = l; i <= mid; i++) { [8kufMY|
temp = data; 3^jkd)xw
} [6ycs[{!
for (j = 1; j <= r - mid; j++) { x=S8UKUx
temp[r - j + 1] = data[j + mid]; 9$ VudE>;
} k},@2#W]
int a = temp[l]; b0(bL_,
int b = temp[r]; 8QJ^@|7
for (i = l, j = r, k = l; k <= r; k++) { pr=f6~Z-y
if (a < b) { /v<FH}
data[k] = temp[i++]; \GF9;N}V
a = temp; ??]b,f4CNa
} else { h!~Qyb>W
data[k] = temp[j--]; MD4RSl<F
b = temp[j]; R!+_mPb=Q*
} ydZS^BqG
} M~?2g.o'D
} *GZ7S m
De<kkR{4
/** ! %~P[;.
* @param data kndN} Vq
* @param l w/1Os!p
* @param i Il4R R
*/ y/.I<5+Bu
private void insertSort(int[] data, int start, int len) { j}`XF?2D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZZ? KD\S5
} (drDC1\
} ZRy'lW
} yq=rv$.s
} s7Z+--I)L
E,}(jAq7
堆排序： P\rA>ZY
V[#$Sz[G
package org.rut.util.algorithm.support; 3oQ?VP
Y& p ~8
import org.rut.util.algorithm.SortUtil; UhX)?'J
lf9mdbm
/** qS!U1R?s
* @author treeroot 9F"^MzZ
* @since 2006-2-2 }8LTYn
* @version 1.0 %E"dha JY
*/ mHB0eB'l
public class HeapSort implements SortUtil.Sort{ =M],5<2;
yEPkF0?
/* (non-Javadoc) Gl6M(<f\5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B.#.gB#C
*/ =M."^X
public void sort(int[] data) { Q3'L\_1L
MaxHeap h=new MaxHeap(); &~&oB;uR
h.init(data); A|`mIma#
for(int i=0;i h.remove(); `gX$N1(
System.arraycopy(h.queue,1,data,0,data.length); s= bP@[Gj
} ws([bS2h
O$(#gB'B
private static class MaxHeap{ O!k C
x>GxyVE
void init(int[] data){ lcR1FbJ2'
this.queue=new int[data.length+1]; 1~ZFkcV_C
for(int i=0;i queue[++size]=data; /=[hRn@)A
fixUp(size); Ca}V5O
} 1wLEkp!~
} >*h3u7t
43s8a
private int size=0; $)Ty@@7C
:;URLl0
private int[] queue; X<<FS%:+
{lbNYjknS
public int get() { 7srq~;j3
return queue[1]; l\_81oZ
} R*l3 zn>
4XgzNwm
public void remove() { (2(y9r*1
SortUtil.swap(queue,1,size--); I\<)9`O
fixDown(1); eZ|_wB'r
} hiw>Q7W
file://fixdown *:Uq ;)*
private void fixDown(int k) { PB;j4
int j; j_0xE;g"]
while ((j = k << 1) <= size) { ?>DwNz^.!
if (j < size %26amp;%26amp; queue[j] j++; v!j%<H`NI
if (queue[k]>queue[j]) file://不用交换 _BI[F m
break; nP+jkNn3
SortUtil.swap(queue,j,k); 6T6UIq
k = j; X}Fqif4A
} qZ%0p*P#_
} 4"s/T0C
private void fixUp(int k) { 3 p!t_y|SX
while (k > 1) { `B/74Wa3q
int j = k >> 1; ltlnXjRUv
if (queue[j]>queue[k]) qHu\3@px
break; #F#M<d3-2
SortUtil.swap(queue,j,k); %+oV-o\ #A
k = j; ;umbld0
} o('6,D
} Tbj}04;I
GI%9Tif
} N>IkK*v
9>/:c\q+
} ,VZ<r5NT
$pajE^d4V
SortUtil： [6CWgQ%Ue
z{nd4qOsD
package org.rut.util.algorithm; 1"No~/_
iCy$ rC
import org.rut.util.algorithm.support.BubbleSort; #]J"j]L
import org.rut.util.algorithm.support.HeapSort; *&~ '
import org.rut.util.algorithm.support.ImprovedMergeSort; pV/5w<_x?
import org.rut.util.algorithm.support.ImprovedQuickSort; o>A']+`Eu
import org.rut.util.algorithm.support.InsertSort; 1Sd<cOEd
import org.rut.util.algorithm.support.MergeSort; >)VWXv0
import org.rut.util.algorithm.support.QuickSort; v;d3uunqv
import org.rut.util.algorithm.support.SelectionSort; 7AQv4
import org.rut.util.algorithm.support.ShellSort; AU<A\
#Ht;5p>5
/** yHn8t]{
* @author treeroot bZu2.?{
* @since 2006-2-2 -d^c!Iu|
* @version 1.0 B !Z~jT
*/ kg^5D3!2{Q
public class SortUtil { i:7cdhz
public final static int INSERT = 1; CIAKXYM
public final static int BUBBLE = 2; cX|(/h,W/
public final static int SELECTION = 3; D:PrFa
public final static int SHELL = 4; ;R^=($X
public final static int QUICK = 5; D{^CJ :n
public final static int IMPROVED_QUICK = 6; f!J?n]
public final static int MERGE = 7; oWBjPsQ
public final static int IMPROVED_MERGE = 8; tLM/STb6
public final static int HEAP = 9; fDwqu.K
`/9&o;qM
public static void sort(int[] data) { M7//*Q'?
sort(data, IMPROVED_QUICK); GSVLZF'+
} ;ApldoMi
private static String[] name={ NUX$)c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T*](oA@
}; u>[hLXuB
a6hDw'8!
private static Sort[] impl=new Sort[]{ jk1mP6'P|
new InsertSort(), r_pZK(G%
new BubbleSort(), {r:5\
new SelectionSort(), ?F9c6$|
new ShellSort(), `}~NZ
new QuickSort(), AhQsv.t
new ImprovedQuickSort(), v[<;z(7Qk
new MergeSort(), =qS\+
new ImprovedMergeSort(), XT{ukEvDR
new HeapSort() ij02J`w:Ra
}; d#:7V%]dp
BP8jReX^
public static String toString(int algorithm){ $pj;CoPm
return name[algorithm-1]; CMU\DO
} 7$7#z\VWu
aR}Il&
public static void sort(int[] data, int algorithm) { Nj+gSa9
impl[algorithm-1].sort(data); hf5+$^RZ
} 1!A'mkk8
8-FW'bA
public static interface Sort { Qp~3DUM
public void sort(int[] data); isor%R!
} no7Q%O9
}=s64O9j
public static void swap(int[] data, int i, int j) { >44,Dp]
int temp = data; Y#rd' 8
data = data[j]; imZ"4HnPP
data[j] = temp; ~D_Wqr
} zUz j F
} @^,9O92l