[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; Zr,:i MPZ
} Al="ss&2
int i1=l; x@3Ix,b'
int i2=mid+1; ec/1Z8}p
for(int cur=l;cur<=r;cur++){ =$6z1] ;3
if(i1==mid+1) \Tf845
data[cur]=temp[i2++]; @K; 4'b~
else if(i2>r) &*\wr}a!
data[cur]=temp[i1++]; e&zZr]vs]l
else if(temp[i1] data[cur]=temp[i1++]; sf4NKe2*
else o5dPE{f
data[cur]=temp[i2++]; k3::5&
} mGZ^K,)&OR
} ZI4[v>
:@zz5MB5@
} g$<Sh.4A
Md_S};!QN6
改进后的归并排序: MG<kvx~2
bcFG$},k
package org.rut.util.algorithm.support; e[f}Lxln
E}K6Op;=v5
import org.rut.util.algorithm.SortUtil; >[;+QVr;
2Z 4Ekq0@
/** OnE#8*8
* @author treeroot iB1"aE3
* @since 2006-2-2 pIBL85Xe
* @version 1.0 F)'kN2
*/ m,KG}KX
public class ImprovedMergeSort implements SortUtil.Sort { XVcY?_AS#
cl kL)7RQ
private static final int THRESHOLD = 10; Lu,72i0O ^
Tg|0!0qD]F
/* 9~i=Af@
* (non-Javadoc) Jhdo#}Ub
* R7u&`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $d2mcwh\
*/ ]cvP !
public void sort(int[] data) { }t}y
int[] temp=new int[data.length]; @&(0]kZ6
mergeSort(data,temp,0,data.length-1); EYNi`
} $'FPsoH
D+G?:mR
private void mergeSort(int[] data, int[] temp, int l, int r) { $'#hCs
int i, j, k; f& P'Kxj_
int mid = (l + r) / 2; 0Z9>%\km_
if (l == r) ^]}+s(
return; *#p}>\Y{
if ((mid - l) >= THRESHOLD) T.\=R
mergeSort(data, temp, l, mid); ;oW#>!HrY
else *@`Sx'5!
insertSort(data, l, mid - l + 1); Fd!Np7xw
if ((r - mid) > THRESHOLD) D4nYyj1O3
mergeSort(data, temp, mid + 1, r); 8,unq3
else 8D3|}z?
insertSort(data, mid + 1, r - mid); &`+tWL6L
gXZl3
for (i = l; i <= mid; i++) { .d{@`^dh1]
temp = data; yf3c-p
} <4r3ZV;'
for (j = 1; j <= r - mid; j++) { E(]39B"i
temp[r - j + 1] = data[j + mid]; }pqnF53
} F(+,M~
int a = temp[l]; 1vw[{.wC
int b = temp[r]; z2'3P{#s
for (i = l, j = r, k = l; k <= r; k++) { aQzDOeTi
if (a < b) { ,gAa9
data[k] = temp[i++]; oD1rt>k
a = temp; LsB|}_j7
} else { A=8%2UwI
data[k] = temp[j--]; WUnz
b = temp[j]; e$'|EE.=q+
} +/+:D9j ,
} h`Ld%iN\
} d)hA'k
BMaw]D
/** Eod'Esye5
* @param data *Ae> ,LyE
* @param l )LOV)z|}
* @param i ')eg6IC0&T
*/ S9\_ODv
private void insertSort(int[] data, int start, int len) { :(7icHa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (%p@G5GU
} f_\,H|zco)
} yhTC?sf<
} t5t!-w\M$+
} FFC"rG
~)ut"4
堆排序： VINb9W}G[
8NP|>uaj
package org.rut.util.algorithm.support; |.]sL0;4Z
3i\<#{
import org.rut.util.algorithm.SortUtil; mO#62e4C
,%Go.3i[
/** _=Y?' gHH
* @author treeroot mf4C68DI@u
* @since 2006-2-2 H5MO3DJ
* @version 1.0 2iX57-6Ub
*/ 6l Suzu
public class HeapSort implements SortUtil.Sort{ Rda~Drz
pAdx 6
/* (non-Javadoc) Twq/Y07M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -!Ov{GHr0
*/ y6#AL<W@=
public void sort(int[] data) { 2g0_[$[m
MaxHeap h=new MaxHeap(); xlKg0&D
h.init(data); mCb1^Y
for(int i=0;i h.remove(); `2 6t+Tb
System.arraycopy(h.queue,1,data,0,data.length); J_-K"T|f
} {KQ]"a 6
85e!)I_
private static class MaxHeap{ P:8qmDXo
v?6g. [;?
void init(int[] data){ {wK|C<K
this.queue=new int[data.length+1]; czG]rl\1
for(int i=0;i queue[++size]=data; *3R3C+ L
fixUp(size); |[+/ ]Y
} NC@L,)F
} ^uCZO
[N=v=J9
private int size=0; d U}kimz
yq6Gyoi<
private int[] queue; TmEJ!)*
DH IC:6EY
public int get() { G*N}X3H:o
return queue[1]; ==!k99`f,
} h85kQ^%
%+8"-u
public void remove() { qT153dNA&
SortUtil.swap(queue,1,size--); v?O6|0#x
fixDown(1); GS)4,.
} c9/&A
file://fixdown B'}pZOa[Wb
private void fixDown(int k) { xq@_' 3X
int j; H*KZZTKd
while ((j = k << 1) <= size) { W ])Lc3X
if (j < size %26amp;%26amp; queue[j] j++; fUKi@*^ZUa
if (queue[k]>queue[j]) file://不用交换 oVAY}q|wU
break; :iEIo7B
SortUtil.swap(queue,j,k); R!z32 <5k
k = j; `fM]3]x>
} E7`Q=4@e
} goje4;
private void fixUp(int k) { !+o`,KTYp
while (k > 1) { 96#aGh>
int j = k >> 1; p|0ZP6!|
if (queue[j]>queue[k]) is6M{K3
break; JqTR4[`Z\
SortUtil.swap(queue,j,k); Dkyw3*LCn%
k = j; ;N?raz2mEi
} @3v[L<S{
} EvGKcu
D/oO@;`'c
} !;%+1j?d
#+ai G52+
} s`dwE*~
9D`p2cO
SortUtil： YZ(tjIgQ
,t|qhJF
package org.rut.util.algorithm; Lk`,mjhk
Qj3l>O
import org.rut.util.algorithm.support.BubbleSort; ^&!iqK2o
import org.rut.util.algorithm.support.HeapSort; f?BApm
import org.rut.util.algorithm.support.ImprovedMergeSort; [AN= G!r
import org.rut.util.algorithm.support.ImprovedQuickSort; d>gN3}tT
import org.rut.util.algorithm.support.InsertSort; [kKg?I$D@B
import org.rut.util.algorithm.support.MergeSort; H[[#h=r0f
import org.rut.util.algorithm.support.QuickSort; "QLp%B,A
import org.rut.util.algorithm.support.SelectionSort; #>_5PdO
import org.rut.util.algorithm.support.ShellSort; ?Zh,W(7W
XY)I~6$Y
/** IfzW%UL
* @author treeroot Sau?Y
* @since 2006-2-2 [J\! 2\Oo
* @version 1.0 g!I0UAm
*/ OhiY <
public class SortUtil { t2_pwd*B
public final static int INSERT = 1; B!AJ*
public final static int BUBBLE = 2; 8;<3Tyjzu
public final static int SELECTION = 3; "NvB@>S
public final static int SHELL = 4; G_v^IM#B=
public final static int QUICK = 5; ojbms>a
public final static int IMPROVED_QUICK = 6; i~ITRi@
public final static int MERGE = 7; 7*C>4Gs
public final static int IMPROVED_MERGE = 8; W%P$$x5&
public final static int HEAP = 9; t2hI^J0y
W{X5~w(
public static void sort(int[] data) { 8dlhL8#
sort(data, IMPROVED_QUICK); 7OdJ&Gzd
} /;;$9O9
private static String[] name={ Y*-dUJK-`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,tl(\4n
}; M-zqD8D
P.W@5:sD
private static Sort[] impl=new Sort[]{ V2o1~R~
new InsertSort(), 3FsX3K,_X
new BubbleSort(), F-GrQd:O=
new SelectionSort(), %'&_Po\
new ShellSort(), Gq =i-I
new QuickSort(), Noi+mL
new ImprovedQuickSort(), A&UGr971
new MergeSort(), kn= fW1
new ImprovedMergeSort(), 60X))MyN
new HeapSort() ;R*tT%Z,
}; 4YyVh.x
W0\ n?$ZC~
public static String toString(int algorithm){ I!u fw\[
return name[algorithm-1]; bF c %
} ve*m\DU
&d@N3y
public static void sort(int[] data, int algorithm) { [;$9s=:[
impl[algorithm-1].sort(data); @,;VMO
} KvNw'3Ua
i'MpS
public static interface Sort { V!zU4!@qP
public void sort(int[] data); m/p:W/0L
} 'M=V{.8U
:$^cY>o
public static void swap(int[] data, int i, int j) { c3!YA"5
int temp = data; qMmhVUx
data = data[j]; qs3V2lvYw{
data[j] = temp; ;G4g;YHy|
} f19'IH$n{
} >*"1`vcxF