[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; $P#Cf&R
} idiJ|2T"G
int i1=l; !{5jP|vo
int i2=mid+1; 9An_zrJ%i
for(int cur=l;cur<=r;cur++){ t/z]KdK P
if(i1==mid+1) K$_Rno"
data[cur]=temp[i2++]; |0nbO2}
else if(i2>r) g;)xf?A9q
data[cur]=temp[i1++]; Fhw:@@=
else if(temp[i1] data[cur]=temp[i1++]; 3\FPW1$i|[
else nnLE dJ}n
data[cur]=temp[i2++]; DArEIt6Q
} >o #^r;
} Pnq[r2#]:
I,dH\]^h=
} ]|g{{PWH
QW :-q(s
改进后的归并排序: M##h<3I
a x1
package org.rut.util.algorithm.support; >Ya+#j~CZ
5^'PjtW6
import org.rut.util.algorithm.SortUtil; W,Q"?(+]B
=)5eui>{
/** VQE8hQ37
* @author treeroot 'T@K$xL8
* @since 2006-2-2 Omo1p(y
* @version 1.0 vUBkoC2Q
*/ ]F5?>du@~
public class ImprovedMergeSort implements SortUtil.Sort { q,-bw2
+P,hT
private static final int THRESHOLD = 10; UlQZw*ce
p~1,[]k
/* nW2fB8yq
* (non-Javadoc) + 5E6|
* D*3\4=6x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]0P-?O:
*/ 3Gi#WV4$
public void sort(int[] data) { _ +Ww1f
int[] temp=new int[data.length]; >-rDBk ;K
mergeSort(data,temp,0,data.length-1); \(Z'@5vC
} A,-UW+:
X8l[B{|
private void mergeSort(int[] data, int[] temp, int l, int r) { 5]cmDk
int i, j, k; Nzj7e 1=
int mid = (l + r) / 2; GKdQ
if (l == r) LY}%|w
return; 8 PI>Q
if ((mid - l) >= THRESHOLD) 0-#SvTf>;:
mergeSort(data, temp, l, mid); 9`4mvK/@
else O~yPe.
insertSort(data, l, mid - l + 1); HV'xDy[)
if ((r - mid) > THRESHOLD) 8_0j^oh
mergeSort(data, temp, mid + 1, r); i)fAm$8#G
else @czNiWU"4;
insertSort(data, mid + 1, r - mid); hX4&B
jSVIO v:
for (i = l; i <= mid; i++) { TJ9JIxnS
temp = data; D?~`L[}I!}
} tqyR~
for (j = 1; j <= r - mid; j++) { >#).3
temp[r - j + 1] = data[j + mid]; IB#L5yN r
} GkqKIs
int a = temp[l]; u50 o1^<X
int b = temp[r]; ` MIZqHM @
for (i = l, j = r, k = l; k <= r; k++) { R}lS@w1
if (a < b) { xab1`~%K
data[k] = temp[i++]; E O^j,x g
a = temp; wi/Fx=w
} else { l;^Id#N
data[k] = temp[j--]; *gMo(-tN
b = temp[j]; _jt>%v4}4
} SwHrHj
} Xy[O
} /IS_-h7>XS
b^b@W^\hn
/** 7i?"akr4
* @param data cp.c$
* @param l q_PxmPE@3v
* @param i vd`;(4i#X
*/ A?[06R5E#
private void insertSort(int[] data, int start, int len) { `l+{jrRb<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TZ8:3ti
} 3>FeTf#:
} Dizc#!IGU
} .Bxv|dji
} #(6^1S%
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堆排序： T:$a x
1fwjW0t
package org.rut.util.algorithm.support; h:{rjXK
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import org.rut.util.algorithm.SortUtil; i?" ~g!A
"%$jl0i_c
/** ()K,~
* @author treeroot It$'6HV~Sb
* @since 2006-2-2 1&%6sZN
* @version 1.0 K,f*}1$qM
*/ r(=
public class HeapSort implements SortUtil.Sort{ c^$_epc*
dqd:V$o
/* (non-Javadoc) rH@{[~p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z0=(l?)#
*/ cm`Jr#kl{
public void sort(int[] data) { =[]V$<G'w{
MaxHeap h=new MaxHeap(); 9eOP:/'}w
h.init(data); \@IEqm6
for(int i=0;i h.remove(); PvW {g5)S
System.arraycopy(h.queue,1,data,0,data.length); J_PAWW
} PuyJ:#a
GQ=Zp3[
private static class MaxHeap{ uL!QeY>k\
byALM
void init(int[] data){ -J7BEx
this.queue=new int[data.length+1]; }4'5R
for(int i=0;i queue[++size]=data; KtTlc#*KU
fixUp(size); k:1p:&*m
} KO*# ^+g
} gumT"x .^
=j,2
private int size=0; ']Q4SB"q
m/ D~D~
private int[] queue; mab921-n
S5o\joc
public int get() { !e>+O^
return queue[1]; B49: R>
} }STTDq4
XPJsnu
public void remove() { n1yIQ8F
SortUtil.swap(queue,1,size--); FA5|`
fixDown(1); c?ZM<Y"
} j@g`Pm%u`
file://fixdown c5 ^CWk K
private void fixDown(int k) { q!L@9&KAQ
int j; .DX
while ((j = k << 1) <= size) { /x2-$a:<
if (j < size %26amp;%26amp; queue[j] j++; 2A>s a3\
if (queue[k]>queue[j]) file://不用交换 j p"hbV
break; 4F[4H\>'
SortUtil.swap(queue,j,k); "2l$}G
k = j; $<NrJgQ
} {C>E*qp}f
} w.7pD
private void fixUp(int k) { ?nf!sJ'm
while (k > 1) { #uRj9|E7
int j = k >> 1; T`ofj7$:
if (queue[j]>queue[k]) ( *&E~g
break; d76nyQKK
SortUtil.swap(queue,j,k); X}V}%
k = j; }}?,({T|n
} pY~/<lzW
} \\R$C
_^%DfMP3i\
} -- >q=hlA
U ;%cp
} F<V.OFt
2gasH11M
SortUtil： }xa~U,#5
" ""k}M2A
package org.rut.util.algorithm; Y5fz_ [("
Xp67l!{v
import org.rut.util.algorithm.support.BubbleSort; ^RI&`5g
import org.rut.util.algorithm.support.HeapSort; n^lr7(!6
import org.rut.util.algorithm.support.ImprovedMergeSort; 0s$;3qE
import org.rut.util.algorithm.support.ImprovedQuickSort; 7g7[a/Bts
import org.rut.util.algorithm.support.InsertSort; 7Gwo:s L
import org.rut.util.algorithm.support.MergeSort; %&iodo,EP'
import org.rut.util.algorithm.support.QuickSort; 4 (c{%%
import org.rut.util.algorithm.support.SelectionSort; /R(]hmW
import org.rut.util.algorithm.support.ShellSort; `R!%k]$
xqQLri}
/** ~T^,5Tz1j
* @author treeroot 0$g;O5y"i
* @since 2006-2-2 _LSp \{Z
* @version 1.0 +\R__tx;
*/ Ur9L8EdC
public class SortUtil { #E$*PAB
public final static int INSERT = 1; ?E}9TQ
public final static int BUBBLE = 2; JP,yRb\
public final static int SELECTION = 3; :Tcvj5
public final static int SHELL = 4; @|PUet_pb
public final static int QUICK = 5; Y@y"bjK \
public final static int IMPROVED_QUICK = 6; h(K}N5`
public final static int MERGE = 7; yZV Y3<]
public final static int IMPROVED_MERGE = 8; e>2KW5.
public final static int HEAP = 9; Qv WvS9]
8-"D.b4
public static void sort(int[] data) { Ya `$.D
sort(data, IMPROVED_QUICK); Al1}Ir
} yvWM]A
private static String[] name={ ^WkqRs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SE$~Wbj?
}; ?,`g h}>
U4NH9-U'
private static Sort[] impl=new Sort[]{ dczq,evp
new InsertSort(), IhHKRb[
new BubbleSort(), <Uy $b4h
new SelectionSort(), tR\cS)
new ShellSort(), YB1Jv[
new QuickSort(), /K(l[M
new ImprovedQuickSort(), tIT/HG_o
new MergeSort(), `\r<3?
new ImprovedMergeSort(), jf.WmiDC
new HeapSort() y(wb?86#W5
}; 2f0mr?l)N
T#\=v(_NR
public static String toString(int algorithm){ R; ui 4wg6
return name[algorithm-1]; t$3B#=
} ]$BC f4:
;$67GK
public static void sort(int[] data, int algorithm) { 2fgYcQ8`
impl[algorithm-1].sort(data); q`3HHq
} B7wzF"
=$y;0]7Lwi
public static interface Sort { i#aKW'
public void sort(int[] data); 'YJ~~o
} KF6N P
{"2Hv;x
public static void swap(int[] data, int i, int j) { z(u,$vZ_
int temp = data; `-.6;T}2U
data = data[j]; nvCp-Z$
data[j] = temp; rd;E /:`5
} XmP,3KG2{S
} |l-O e