[JAVA]用Java实现的各种排序

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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; ~fn2B
} %8tlJQvu
int i1=l; T%Vii*?M
int i2=mid+1; #vYdP#nWb
for(int cur=l;cur<=r;cur++){ Nrva?W_i
if(i1==mid+1) Iw8;",e2
data[cur]=temp[i2++]; G:$wdT(u
else if(i2>r) Iu^#+n
data[cur]=temp[i1++]; k`6T% [D]
else if(temp[i1] data[cur]=temp[i1++]; Zg%U4m:
else iVzv/Lqm1
data[cur]=temp[i2++]; ~oh=QakW
} -@-cG\{
} 2P~zYdjS
M;={]w@n
} b2. xJ4
]L%qfy4
改进后的归并排序: Q2iS0#
aHe/MucK
package org.rut.util.algorithm.support; lqa.Nj
a1B_w#?8
import org.rut.util.algorithm.SortUtil; 0n|op:]BHM
FJgr=9>
/** &Jv j@,>$d
* @author treeroot wX" 6 S:
* @since 2006-2-2 5zX;/n~
* @version 1.0 /i$E|[
*/ &aldnJ
public class ImprovedMergeSort implements SortUtil.Sort { /pZLt)=P
Xz&Hfs"/J
private static final int THRESHOLD = 10; kehv85
<7/_Vs)F0
/* xWD=",0+
* (non-Javadoc) }kdYR#{s
* V}=9S@$o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +.&#whEw(i
*/ 8E"Ik~
public void sort(int[] data) { UMuqdLaT9
int[] temp=new int[data.length]; 8P0XY S@
mergeSort(data,temp,0,data.length-1); ~mx me6"v
} 7OG=LF*V-
(EGsw o
private void mergeSort(int[] data, int[] temp, int l, int r) { ge9j:S{
int i, j, k; 9%j_"+<c
int mid = (l + r) / 2; N&U=5c`Q'
if (l == r) i)g=Lew
return; mK5<;$
if ((mid - l) >= THRESHOLD) |\%[e@u
mergeSort(data, temp, l, mid); kMAQHpDD
else nVko]y
insertSort(data, l, mid - l + 1); KlDW'R$
if ((r - mid) > THRESHOLD) r4k=i4
mergeSort(data, temp, mid + 1, r); uOc:^
else `Lb^!6`)
insertSort(data, mid + 1, r - mid); DcE)6z#
e)LRD&Q
for (i = l; i <= mid; i++) { uA7~`78
temp = data; %+YLe-\?
} \RyOexNZ
for (j = 1; j <= r - mid; j++) { FA<|V!a
temp[r - j + 1] = data[j + mid]; R<@s]xX_
} M5s>;q)
int a = temp[l]; j|TcmZGO
int b = temp[r]; N}b/;Y
for (i = l, j = r, k = l; k <= r; k++) { kB{
if (a < b) { o8.KakrPP
data[k] = temp[i++]; S(eCG2gR
a = temp; P7O$*
} else { )1wC].RFYm
data[k] = temp[j--]; 4eK!1|1
b = temp[j]; F0W4B
} #\[h.4i
} a,tzt ]>
} lfp[(Ph)9
&[$qA
/** [X]yj
* @param data t=o0 #jo
* @param l lxx)l(&
* @param i qk;*$Q
*/ u+UtvzUC
private void insertSort(int[] data, int start, int len) { b}< T<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x.CUJ^_.
} |1wfLJ4--l
} (+q#kKR
} B:#5U85m
} 2K4Jkyi
b<>GF-`w
堆排序： :kz*.1
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package org.rut.util.algorithm.support; QPB@qx#@
U>?q|(u
import org.rut.util.algorithm.SortUtil; }kzGuNj
9W88_rE'e}
/** ".A+'pJ
* @author treeroot yoiKt; S
* @since 2006-2-2 'NHtCs=F
* @version 1.0 nXPl\|pXt
*/ IV*@}~BJ
public class HeapSort implements SortUtil.Sort{ nf=*KS\v
a3D''Ra
/* (non-Javadoc) %Z9&zmO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .'N:]G@!
*/ ([SrIG>X
public void sort(int[] data) { |C}n]{*|
MaxHeap h=new MaxHeap(); 07 [%RG
h.init(data); "} =RPc%9
for(int i=0;i h.remove(); 2u9O+]EP
System.arraycopy(h.queue,1,data,0,data.length); l?Vm/YXb
} I,;@\
P"d7Af
private static class MaxHeap{ Y|JC+Ee
$BHbnsaQ
void init(int[] data){ 5p!X}u]
this.queue=new int[data.length+1]; ^'>kZ^w0
for(int i=0;i queue[++size]=data; 4g<F."
fixUp(size); h!.#r*vV
} M &`ZF
} :j_OO5b!
&N4Jpa}w/%
private int size=0; #yz5CWu
W <.h@Rz+
private int[] queue; bW03m_<M<1
,{DZvif
public int get() { f}{ lRk
return queue[1]; *FhD%><
} !_EL{/ko
W,<L/ZKJ
public void remove() { 4Ufx,]
SortUtil.swap(queue,1,size--); ?4>uGaU\
fixDown(1); '](4g/%
} T,N"8N{K"
file://fixdown rHe*/nN%*
private void fixDown(int k) { _ nFsC
int j; b^ wWg
while ((j = k << 1) <= size) { R-odc,P=
if (j < size %26amp;%26amp; queue[j] j++; L(Ww6oj
if (queue[k]>queue[j]) file://不用交换 O`Ht|@[6
break; CUJP"u>8M
SortUtil.swap(queue,j,k); :eIPPh|\
k = j; &XG k
} kkWqP20q
} w&&uk[Gh/a
private void fixUp(int k) { *;^!FBT
while (k > 1) { .gY}}Q
int j = k >> 1; 6x18g(KbP
if (queue[j]>queue[k]) X^204K%:
break; yLv jfP1
SortUtil.swap(queue,j,k); "mT95x\NA\
k = j; "s[Y$!#
} ;/tZsE{
} Qdepzo>E
/P_1vQq
} dzA5l:5
IX/FKSuq
} $BIQ#T>qK
W?+U%bIZ9
SortUtil： ?t;>]Wo;
g7*"*%v 2
package org.rut.util.algorithm; F\pw0^K;N
>R|*FYam
import org.rut.util.algorithm.support.BubbleSort; /JP]5M)
import org.rut.util.algorithm.support.HeapSort; f1eY2UtWQ
import org.rut.util.algorithm.support.ImprovedMergeSort; gkxEy5c[
import org.rut.util.algorithm.support.ImprovedQuickSort; s=)0y$
import org.rut.util.algorithm.support.InsertSort; do3 BI4Q
import org.rut.util.algorithm.support.MergeSort; [h"#Gwb=;
import org.rut.util.algorithm.support.QuickSort; >Hh8K<@NL
import org.rut.util.algorithm.support.SelectionSort; E>_?9~8Mf
import org.rut.util.algorithm.support.ShellSort; }qf9ra
t<`h(RczHI
/** In1VW|4h
* @author treeroot FN$hEc!
* @since 2006-2-2 'vgO`
* @version 1.0 Rg:3}T`~n
*/ XBJ9"G5
public class SortUtil { R<r"jOd]
public final static int INSERT = 1; L,@OOBD
public final static int BUBBLE = 2; y&y(<
public final static int SELECTION = 3; 5fh@nR
public final static int SHELL = 4; Z=;+) #,
public final static int QUICK = 5; |.bp
public final static int IMPROVED_QUICK = 6; G5^gwG+
public final static int MERGE = 7; "|1MJuY_6
public final static int IMPROVED_MERGE = 8; 6k#H>zY,
public final static int HEAP = 9; Effp^7 3
P1PP#>E-2
public static void sort(int[] data) { &&1q@m,cP
sort(data, IMPROVED_QUICK); xP@VK!sc
} ` eB-C//
private static String[] name={ 1[k~*QS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9JF*xXd>Q
}; )9,*s!)9
2>{_O?UN
private static Sort[] impl=new Sort[]{ >$.u|a
new InsertSort(), Q@3.0Hf|{
new BubbleSort(), wf7<#jIq
new SelectionSort(), `[+9n2j
new ShellSort(), ]Ll<
new QuickSort(), Q]*YIb~D
new ImprovedQuickSort(), C,C=W]G
new MergeSort(), +uPN+CgQ@
new ImprovedMergeSort(), Z_%}pe39B
new HeapSort() @5gZK[?|I
}; ?FRR";
tVx.J'"Y
public static String toString(int algorithm){ T7;)HFGeW
return name[algorithm-1]; M mg#Vy~
} oz}p]l7
uo1G
public static void sort(int[] data, int algorithm) { ht^U VV2
impl[algorithm-1].sort(data); uCK!lq-
} ~A8%[.({5
?KxI|os
public static interface Sort { 5H6GZ:hp
public void sort(int[] data); l3aG#4jj
} [7Nn%eZC
UQ|zSalv,
public static void swap(int[] data, int i, int j) { F"a^`E&
int temp = data; PVO9KWv**
data = data[j]; *$(=I6b
data[j] = temp; /p,D01Ws}(
} #( nheL
} ]\nG1+ta