[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; ,LU|WXRB
} k/Ao?R=@gI
int i1=l; Y5mk*Q#q
int i2=mid+1; D*wY,\
for(int cur=l;cur<=r;cur++){ h{ EnS5~
if(i1==mid+1) %w3tzE1Hq
data[cur]=temp[i2++]; 7U&<{U<
else if(i2>r) `]/0&S
data[cur]=temp[i1++]; '|yBz1uL
else if(temp[i1] data[cur]=temp[i1++]; j4(f1
else G98fBw
data[cur]=temp[i2++]; IfCa6g<&(
} 0A75)T=lQ
} I$fm"N
=u5( zaBe
} R]S!PSoL
fQ2U|
改进后的归并排序: S^5Qhv
LdX'V]ITh
package org.rut.util.algorithm.support; d}^hZ8k|
nc#} \
import org.rut.util.algorithm.SortUtil; {-)I2GJav
FJ|JXH*
/** Yjx4H
* @author treeroot ?ViU%t8J5
* @since 2006-2-2 z{U^j:A
* @version 1.0 S$GWY^5}{
*/ H5A7EZq}`
public class ImprovedMergeSort implements SortUtil.Sort { q9$K.=_5
(^)(#CxO
private static final int THRESHOLD = 10; AIM<mU
'W p~8}i@
/* mbIHzzW>
* (non-Javadoc) (+bt{Ma
* %^;rYn3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *adwCiB
*/ B(R$5Xp
public void sort(int[] data) { -JdNA2P
int[] temp=new int[data.length]; 6[a;83
mergeSort(data,temp,0,data.length-1); 90a!_8o
} LH q~`
G=KXA'R)1.
private void mergeSort(int[] data, int[] temp, int l, int r) { mqQC`Aqx:
int i, j, k; @dhnpR:L
int mid = (l + r) / 2; 6J3<k(#:
if (l == r) qoC<qn{.a
return; ,mE}#cyY
if ((mid - l) >= THRESHOLD) 6dqI{T-i?
mergeSort(data, temp, l, mid); FMqes5\ 3
else jh~E!%d77
insertSort(data, l, mid - l + 1); L\t?^u
if ((r - mid) > THRESHOLD) AK$i0Rn;pm
mergeSort(data, temp, mid + 1, r); }Y3*X:i7
else JuRx>F4
insertSort(data, mid + 1, r - mid); `t]8 [P5
AZbFj-^4
for (i = l; i <= mid; i++) { %07vH&<C.
temp = data; E qt\It9
} 3s,a%GOk
for (j = 1; j <= r - mid; j++) { FOSC#W9E
temp[r - j + 1] = data[j + mid]; BvpUcICJ
} ] N7(<EV/
int a = temp[l]; eeOG(@@o(
int b = temp[r]; M4L<u,\1s
for (i = l, j = r, k = l; k <= r; k++) { yOm#c>X
if (a < b) { sbq:8P#
data[k] = temp[i++]; ?#/~BZR!
a = temp; tr%VYc|}
} else { "0?" E\
data[k] = temp[j--]; 207h$a,
b = temp[j]; 6oq/\D$6~
} |h2=9\:]
} 81S0:=
} L&Pj0K-HT3
)bB Va^
/** V`"Cd?R0Z
* @param data d+IN-lR(
* @param l `s_k+ g
* @param i +-MieiKv
*/ 8}|!p>
private void insertSort(int[] data, int start, int len) { 6=jL2cqx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )3)fq:[
} ~4`3p=$
} X;yThb`iI
} )xYGJq4
} -;&-b>b
&B} ,xcNO
堆排序： '17V7A/t
Qa,$_,E
package org.rut.util.algorithm.support; jFwJ1W;?-
vk|xYDD
import org.rut.util.algorithm.SortUtil; ;% l0Ml>
_?;74VWA
/** fI-f Gx
* @author treeroot Eyg F,>.4
* @since 2006-2-2 C&RZdh,$
* @version 1.0 pw=o}-P{
*/ O`0\f8/.?
public class HeapSort implements SortUtil.Sort{ OBnvY2)Ri
uB+:sX-L
/* (non-Javadoc) XOPiwrg%p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]?0]K!7Ea
*/ n<DZb`/uHZ
public void sort(int[] data) { @6{F4
MaxHeap h=new MaxHeap(); eZmwF@
h.init(data); kwrM3nq
for(int i=0;i h.remove(); *~8g:;u
System.arraycopy(h.queue,1,data,0,data.length); q$jwH] .
} PS`F
\kC'y9k
private static class MaxHeap{ d(9C7GLC,
+pbP;zu
void init(int[] data){ GT-ONwVDq
this.queue=new int[data.length+1]; VN]"[
for(int i=0;i queue[++size]=data; UMlvu?u2p1
fixUp(size); dRXrI
} LCok4N$o
} D #C\| E:
c) _u^Dh
private int size=0; 8l>YpS*S^
'$q3Ze
private int[] queue; q 7hoI]
uUh6/=y
public int get() { MUMB\K*$
return queue[1]; F2dwT
} Ej$oRo{IG
Nq[-.}Z6
public void remove() { \N)!]jq
SortUtil.swap(queue,1,size--); ]N6UY
fixDown(1); fq !CB]C
} P B{7u
file://fixdown XPMvAZL
private void fixDown(int k) { vW5>{
int j; hj=k[t|g}
while ((j = k << 1) <= size) { Cuo"6, M
if (j < size %26amp;%26amp; queue[j] j++; -5,+gakSk
if (queue[k]>queue[j]) file://不用交换 sJm v{wM
break; 6Bn}W ?
SortUtil.swap(queue,j,k); Dx.hM[
k = j; DN|+d{^lN
} 1A N)%
} @g1T??h
private void fixUp(int k) { kf_*=ER
while (k > 1) { iy|xF~
int j = k >> 1; =+"-8tz8FV
if (queue[j]>queue[k]) ro18%'RRI
break; Gc<^b
SortUtil.swap(queue,j,k); L:Me
k = j; q`L}\}o
} r9~IR
} z=qxZuFkDs
rz5@E
} PH=O>a`a_O
JgcMk]|'
} c)SQ@B@q
Q,R|VI6Co
SortUtil： M&0U@ r-
[m9=e-KS$Q
package org.rut.util.algorithm; 4&H&zST//m
e(jD[q
import org.rut.util.algorithm.support.BubbleSort; Q57Z~EsF
import org.rut.util.algorithm.support.HeapSort; 9oVprd>%@
import org.rut.util.algorithm.support.ImprovedMergeSort; gflO0$i
import org.rut.util.algorithm.support.ImprovedQuickSort; p I@!2c:}
import org.rut.util.algorithm.support.InsertSort; ,UneS
import org.rut.util.algorithm.support.MergeSort; q5>!.v
import org.rut.util.algorithm.support.QuickSort; [`bA,)y"
import org.rut.util.algorithm.support.SelectionSort; AnQUdU
import org.rut.util.algorithm.support.ShellSort; ?r^>Vk}
*ub"!}$st
/** c1g'l.XL 3
* @author treeroot 8!7`F.BX
* @since 2006-2-2 >%85S>e
* @version 1.0 U6~79Hnt
*/ (o1o);AO
public class SortUtil { D^A#C<Gs
public final static int INSERT = 1; C40W@*6S2
public final static int BUBBLE = 2; T,v5cc:nO
public final static int SELECTION = 3; /.:&9 c
public final static int SHELL = 4; sDyt3xN
public final static int QUICK = 5; 57:27d0y
public final static int IMPROVED_QUICK = 6; T$tO[QR/
public final static int MERGE = 7; 7'R7J"sY`|
public final static int IMPROVED_MERGE = 8; gHVD,Jr
public final static int HEAP = 9; 6jz~q~I
&a";jO GB
public static void sort(int[] data) { `5Em: 8 M
sort(data, IMPROVED_QUICK); ]!cLFXa
} d>x(Bj6
private static String[] name={ @|@6pXR.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -p f9Wk
}; x.>[A^
5hp)Z7
private static Sort[] impl=new Sort[]{ JiRfLB
new InsertSort(), 1yjP`N
new BubbleSort(), QVWUm!
new SelectionSort(), +aRHMH
new ShellSort(), X/23 /_~L`
new QuickSort(), &5R-bYGW
new ImprovedQuickSort(), y_{v&AGmgm
new MergeSort(), &(~"OD
new ImprovedMergeSort(), >@q4Uez
new HeapSort() |JTDwmR
}; Tywrh9[
g715+5z[
public static String toString(int algorithm){ ~0Mw\p%}
return name[algorithm-1]; _&PF(/w
} _cQhT
BXLw
public static void sort(int[] data, int algorithm) { kj'
impl[algorithm-1].sort(data); iayxN5,
} _ Zzne
ybpU?n
public static interface Sort { q ?m<9`
public void sort(int[] data); zA@w[.
} dt(Lp_&v
{0Ej*%
public static void swap(int[] data, int i, int j) { >RKepV(X7
int temp = data; bdvVPjGc&
data = data[j]; OCI{)r<O2m
data[j] = temp; 0Y/k/)Ul]
} ou[Wz{
} NucLf6