[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; G&B}jj
} =|^W]2W$
int i1=l; )bJ6{&
int i2=mid+1; Hw3ES
for(int cur=l;cur<=r;cur++){ .jU0Hu{F4
if(i1==mid+1) F>nrV
data[cur]=temp[i2++]; P =Gb
else if(i2>r) YS6az0ie
data[cur]=temp[i1++]; VZl0)YLK
else if(temp[i1] data[cur]=temp[i1++]; {:+^[rerj
else >I;#BE3
data[cur]=temp[i2++]; <GlV!y
} &cejy>K
} l"g%vS,;`
~H."{
} KAaeaiD
~d8o,.n`1
改进后的归并排序: 1Vvx@1
B(NL3WJ
package org.rut.util.algorithm.support; Y&%0 eI!
%Q01EjRes
import org.rut.util.algorithm.SortUtil; $VNn`0^gF
,RH986,6V
/** $fG/gYvI\
* @author treeroot b .@dUuKz-
* @since 2006-2-2 JB}h}nb
* @version 1.0 U}TQXYAg
*/ <T9m.:l
public class ImprovedMergeSort implements SortUtil.Sort { <o`]wOrl
%^A++Z$`
private static final int THRESHOLD = 10; NsK>UJ'
'S>Jps@
/* |]^! 4[!U
* (non-Javadoc) :RG6gvz
* eu/Sp3@v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VUhu"h@w%
*/ 6d6SP)|j
public void sort(int[] data) { 7qp|Msf},
int[] temp=new int[data.length]; n\,W:G9AR7
mergeSort(data,temp,0,data.length-1); epe}^Pl
} pm|]GkM
QJ'C?hn
private void mergeSort(int[] data, int[] temp, int l, int r) { 4\iQ%fb
int i, j, k; [Y+bW#'
int mid = (l + r) / 2; w Nnb@
if (l == r) 3iwZUqyq
return; S d -+a
if ((mid - l) >= THRESHOLD) 1NJ|%+I
mergeSort(data, temp, l, mid); =@ RVLml
else <#Dc(VhT
insertSort(data, l, mid - l + 1); $'wl{D"
if ((r - mid) > THRESHOLD) S6I8zk)Z4
mergeSort(data, temp, mid + 1, r); 5}VP-04vh
else 4G2V{(@QiZ
insertSort(data, mid + 1, r - mid); ^%.<(:k[L
su$juI{
for (i = l; i <= mid; i++) { 0>Nq$/!
temp = data; irS62Xe
} j=LF1dG"
for (j = 1; j <= r - mid; j++) { n9yxZu
temp[r - j + 1] = data[j + mid]; .Dz /MSl
} YFY)Z7fK
int a = temp[l]; Ek6W:Q:@
int b = temp[r]; fq'Of wT
for (i = l, j = r, k = l; k <= r; k++) { agzG
if (a < b) { 7BnP,Nd"W
data[k] = temp[i++]; wH.'EC
a = temp; 0v?,:]A0E
} else { TgLlmU*qMU
data[k] = temp[j--]; !ywc).]e
b = temp[j]; z m%\L/BF
} %K4-V5f
} 5s9~rm
} kaLRI|hC
`y(3:##p
/** ObUQB+
* @param data bYfcn]N
* @param l @\a- =
* @param i SF7Kb`>Y
*/ _rv_-n]"o
private void insertSort(int[] data, int start, int len) { SzDi=lY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fei$94a
} - U|4`{PP
} ]z,?{S
} R!=XMV3$PH
} cVMTT]cj1
/[p4. FL
堆排序： AWzpk}\
MD,-<X)Qy
package org.rut.util.algorithm.support; K(?7E6\vO
W*0KAC`m
import org.rut.util.algorithm.SortUtil; !PgYn
qr*/}F6
/** A8?>V%b[Y
* @author treeroot ?$?Ni)Z
* @since 2006-2-2 5R4 dN=L*1
* @version 1.0 q^s$4q
*/ t9kgACo/M
public class HeapSort implements SortUtil.Sort{ *\/UT
a?;{0I:Ln
/* (non-Javadoc) Y<B| e91C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IpWl;i`__
*/ q&vr;fB2
public void sort(int[] data) { l"+=z.l6;
MaxHeap h=new MaxHeap(); l}m@9 ~oC
h.init(data); {0|^F!1z
for(int i=0;i h.remove(); ms?h/*E<H
System.arraycopy(h.queue,1,data,0,data.length); $I.'7 &h;
} (b(iL\B$D=
\Tc$P#
private static class MaxHeap{ -6?5|\
8WAg{lVs
void init(int[] data){ )3;S;b
this.queue=new int[data.length+1]; milU,!7J
for(int i=0;i queue[++size]=data; js{ RaR=
fixUp(size); wDsEx!\#
} fE(rDQI
} Z'\_YbB
EfOJ%Xr[,l
private int size=0; 4`i_ 4&TS
+=||c\'
private int[] queue; O@l`D`
YcIk{_N3
public int get() { k]v a
return queue[1]; :5ji.g* 0
} !nTq"d%(W
;&iQNXL
public void remove() { $ED<:[3N
SortUtil.swap(queue,1,size--); 6JJ%`Uojh
fixDown(1); 8^O|Aa$IF:
} %zWtPxAf
file://fixdown GSypdEBj+w
private void fixDown(int k) { (`T:b1
int j; 5RqkAC
while ((j = k << 1) <= size) { *dGW=aM#C
if (j < size %26amp;%26amp; queue[j] j++; N/Z<v* i"
if (queue[k]>queue[j]) file://不用交换 myH#.$=A
break; =>4,/g3
SortUtil.swap(queue,j,k); Ra.<D.
k = j; q K]Wk+
} q$K^E
} *vht</?J
private void fixUp(int k) { cBU>/ zIp
while (k > 1) { #*5A]"k
int j = k >> 1; ~/QzL.S;p
if (queue[j]>queue[k]) p!173y,nL
break; s@0#w*N
SortUtil.swap(queue,j,k); pVLfZ?78
k = j; p=T]%k*^h#
} z[l17+v
} 7GpSWM6
kZfO`BVL
} p5E|0p
^ygN/a>rr
} D/rKqPp|!
6:@tHUm
SortUtil： p^NYJV
Drc\$<9c@
package org.rut.util.algorithm; "QA!z\0\
{l![{
import org.rut.util.algorithm.support.BubbleSort; *joM[ML` 6
import org.rut.util.algorithm.support.HeapSort; 2UA h^i-^
import org.rut.util.algorithm.support.ImprovedMergeSort; S&FMFXF@
import org.rut.util.algorithm.support.ImprovedQuickSort; !'MZeiLP
import org.rut.util.algorithm.support.InsertSort; nx84l7<
import org.rut.util.algorithm.support.MergeSort; Xrc0RWXB8
import org.rut.util.algorithm.support.QuickSort; [Cvo^cC
import org.rut.util.algorithm.support.SelectionSort; ! p458~|
import org.rut.util.algorithm.support.ShellSort; &?v^xAr?B
LsoP >vJG
/** x%5n&B
* @author treeroot %3|0_
* @since 2006-2-2 X^7bOFWE
* @version 1.0 ohOze\T)=
*/ [PdatL2
public class SortUtil { R=xT\i{4h
public final static int INSERT = 1; YOy/'Le^:
public final static int BUBBLE = 2; ZU5hHah.t
public final static int SELECTION = 3; %TP0i#J
public final static int SHELL = 4; ,aU_bve
public final static int QUICK = 5; !D!Q]M5oU
public final static int IMPROVED_QUICK = 6; \IQf|
public final static int MERGE = 7; ?l &S:` L
public final static int IMPROVED_MERGE = 8; k7'_
public final static int HEAP = 9; =bi:<%"
q{nNWvL
public static void sort(int[] data) { [8v v[n/
sort(data, IMPROVED_QUICK); c=0S]_
} S=*rWh8)%<
private static String[] name={ 7o-umZ}8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *0^!%Y'/4
}; g ]e^;
%4*-BCP
private static Sort[] impl=new Sort[]{ ;`p+Vs8C
new InsertSort(), Tu"bbc
new BubbleSort(), C4Z}WBS(
new SelectionSort(), kj{z;5-dl
new ShellSort(), d="Oge8
new QuickSort(), dkVF
new ImprovedQuickSort(), Z]V^s8>
new MergeSort(), M_lQ^7/
new ImprovedMergeSort(), Uus%1hC%a
new HeapSort() S~X&^JvT
}; j")#"& m
,@!io
public static String toString(int algorithm){ '#LbIv4
return name[algorithm-1]; E!nEB(FD
} @TBcVHy
33IJbg
public static void sort(int[] data, int algorithm) { pBl'SQccp
impl[algorithm-1].sort(data); dCc"Qr[k
} }tJRBb
g?&_5)&
public static interface Sort { Xo[j*<=0
public void sort(int[] data); 5-qk"@E W
} .,[NJ:l
OCHjQc
public static void swap(int[] data, int i, int j) { &.^(,pt
int temp = data; $23*:)&J4
data = data[j]; goBl~fqy0
data[j] = temp; G8AT] =
} #@%DY*w]v
} +U9m