[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; "gpfD-BX
} N*w{NB7L
int i1=l; Gd&G*x
int i2=mid+1; 1g!%ej jd
for(int cur=l;cur<=r;cur++){ GB>h8yXH
if(i1==mid+1) c1%ki%J#
data[cur]=temp[i2++]; <Dnv=)Rq
else if(i2>r) blV'-Al
data[cur]=temp[i1++]; d#,
else if(temp[i1] data[cur]=temp[i1++]; tG,xG&
else .@(MNq{"6
data[cur]=temp[i2++]; D//Ts`}+n
} M>Ws}Y
} YWhS<}^
1p>&j%dk
} >GDN~'}^oz
LrfyH"#!:
改进后的归并排序: QZ-6aq\sgp
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package org.rut.util.algorithm.support; {7Ez7'SVV
ctC!b{S"@
import org.rut.util.algorithm.SortUtil; kZ_5R#xK
cRPy5['E
/** j|% C?N
* @author treeroot D2Kh+~l
* @since 2006-2-2 \U`rF
* @version 1.0 ZONe}tv:
*/ VN4H+9E
public class ImprovedMergeSort implements SortUtil.Sort { +>h'^/rAE
vw q Y;7
private static final int THRESHOLD = 10; ET]`
47/YDy%
/* `WU"*HqW
* (non-Javadoc) &_6B{Q
* z2V_nkI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n;dp%SD
*/ @6DV?VL
public void sort(int[] data) { ;@u+b0 j
int[] temp=new int[data.length]; g60rm1b
mergeSort(data,temp,0,data.length-1); 2ap0/l[
} 7+p=4i^@Zs
5@Lz4 `
private void mergeSort(int[] data, int[] temp, int l, int r) { +Y^/0=6h
int i, j, k; 0/%VejZ'
int mid = (l + r) / 2; ;lb@o,R :
if (l == r) cbA90 8@s
return; U@?Roenn
if ((mid - l) >= THRESHOLD) D(S^g+rd
mergeSort(data, temp, l, mid); *$7c||J7
else OGO4~Up
insertSort(data, l, mid - l + 1); $5l=&
if ((r - mid) > THRESHOLD) T%:W6fH7
mergeSort(data, temp, mid + 1, r); <N;HB&mr
else B1gBvss
insertSort(data, mid + 1, r - mid); RIl+QA
A0Hsd
for (i = l; i <= mid; i++) { C}GOwvAL>
temp = data; H]W59-{a
} ('p~h-9Vi
for (j = 1; j <= r - mid; j++) { ,NaNih1
temp[r - j + 1] = data[j + mid]; bR5+({yH
} D7x"P-ie
int a = temp[l]; HTCn=MZm ?
int b = temp[r]; t7DT5SrR
for (i = l, j = r, k = l; k <= r; k++) { V`"A|Y
if (a < b) { 3+jqf@fO
data[k] = temp[i++]; 9a9{OJa6M
a = temp; UYb:q
} else { y|%rW
data[k] = temp[j--]; h|1 /Q (
b = temp[j]; JuT~~Z
} 7l3sd5
} n P4DHb&5
} dAcy;-[[P
pTJJ.#$CEF
/** h{cJ S9e}
* @param data toCT5E_0=
* @param l *<_8]C0>
* @param i VS\~t
*/ qMe$Qr8
private void insertSort(int[] data, int start, int len) { 9rmOf Jo:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); It@.U|
} $/Q*@4t
} 7.l[tKh
} g k[8'
} LN?W~^gsR
uN1O(s
堆排序： =7mn= w?
W]rK*Dc
package org.rut.util.algorithm.support; G u-#wv5@
%9A6c(L
import org.rut.util.algorithm.SortUtil; |^i+Srh
bEE'50D
/** i7w>Nvj]
* @author treeroot E(oI0*S.5
* @since 2006-2-2 7x^P74
* @version 1.0 58Fan*fO
*/ &pD6Qq{
public class HeapSort implements SortUtil.Sort{ ]?`t spm<t
=q(;g]e
/* (non-Javadoc) $>;U^-#3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PI#xRKt
*/ _$?SKid|o
public void sort(int[] data) { (W|Eg
MaxHeap h=new MaxHeap(); w#5^A(NR
h.init(data); S]3t{s#JW7
for(int i=0;i h.remove(); y#Ao6Od6
System.arraycopy(h.queue,1,data,0,data.length); L= fz:H
} 4cni_m]
bCF"4KXK
private static class MaxHeap{ [g:ZIl4p\P
q]Cmaf(
void init(int[] data){ @<tkwu
this.queue=new int[data.length+1]; mRw &^7r
for(int i=0;i queue[++size]=data; a8Jn.!
fixUp(size); +tNu8M@xFo
} >?q()>l
} kmm1b (
k!K}<sX2
private int size=0; shOQ/
d3# >\QCD9
private int[] queue; eEIa=MB*
d3AOuVUf
public int get() { :Uf\r `a9
return queue[1]; Q0I22?
} d([NU;
AAE8j.
public void remove() { ?A/+DRQ(
SortUtil.swap(queue,1,size--); 8M;VX3X
fixDown(1); G_{x)@
} 1;R1Fj&
file://fixdown V6Y:l9
private void fixDown(int k) { |~Hlv^6H
int j; w^?uBeqR
while ((j = k << 1) <= size) { T<"Hh.h
if (j < size %26amp;%26amp; queue[j] j++; C{<qc,!4
if (queue[k]>queue[j]) file://不用交换 [ 44d(P'
break; .AOf-a
SortUtil.swap(queue,j,k); `g&<7~\=A
k = j; y_:i'Ri.
} E4aCL#}D
} q/[)Z @&(
private void fixUp(int k) { QXnL(z
while (k > 1) { 6u`E{$
int j = k >> 1; , [xDNl[Y|
if (queue[j]>queue[k]) n0:Y*Op
break; cTpAU9|(
SortUtil.swap(queue,j,k); =l TV2C<
k = j; qr[H0f]
} xJ)hGPrAl
} y|1,h}H^n
(-tF=wR,W
} Gk0f#;
#8G(r9
} w:P$S
y{ReQn3>y
SortUtil： @sRUl ,M;Z
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package org.rut.util.algorithm; U)%gzXTZ%
x'OE},>i
import org.rut.util.algorithm.support.BubbleSort; s_A<bW566F
import org.rut.util.algorithm.support.HeapSort; /(Se:jH$>
import org.rut.util.algorithm.support.ImprovedMergeSort; %]Gm
import org.rut.util.algorithm.support.ImprovedQuickSort; wiXdb[[#
import org.rut.util.algorithm.support.InsertSort; *P,dR]-m
import org.rut.util.algorithm.support.MergeSort; pZx'%-\-T
import org.rut.util.algorithm.support.QuickSort; $bRakF1'S
import org.rut.util.algorithm.support.SelectionSort; )'BuRN8
import org.rut.util.algorithm.support.ShellSort; c0.i
fJ_d,4
/** I6d4<#Q@L
* @author treeroot 48JD >=@7
* @since 2006-2-2 ^| L@f
* @version 1.0 GE]cH6E
*/ fX=o,=-f
public class SortUtil { n$n)!XL/
public final static int INSERT = 1; !sA[A>
public final static int BUBBLE = 2; E^aHe
public final static int SELECTION = 3; C=&7V
public final static int SHELL = 4; )# le|Rf
public final static int QUICK = 5; pZ?7'+u$L
public final static int IMPROVED_QUICK = 6; ~wmc5L/!?
public final static int MERGE = 7; :uE:mY%R
public final static int IMPROVED_MERGE = 8; #'N"<o[
public final static int HEAP = 9; RHc63b\
w,fA-*bZ 0
public static void sort(int[] data) { 5|>FM&
sort(data, IMPROVED_QUICK); jdsNZV
} AV\6K;~
private static String[] name={ ^sR]w]cz.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Nf(Np1?;c
}; !iBe/yb
d?G~k[C!a
private static Sort[] impl=new Sort[]{ #?/&H;n_8S
new InsertSort(), [EUp4%Z #
new BubbleSort(), BFP (2j
new SelectionSort(), B2\R#&X.
new ShellSort(), a[;TUc^I1F
new QuickSort(), MYgh^%w:
new ImprovedQuickSort(), 5 Z+2
new MergeSort(), <WN?
new ImprovedMergeSort(), bjvpYZC\5
new HeapSort() ^sz4-+>
}; B]Vnu7
?}4 =A&][
public static String toString(int algorithm){ *GxOiv7"4W
return name[algorithm-1]; ag Za+a
} ZPHiR4fQli
l<fZt#T
public static void sort(int[] data, int algorithm) { $e66jV
impl[algorithm-1].sort(data); n#,<-Rb-
} =SJwCT0;
QJ2V&t"3
public static interface Sort { j{00iA}
public void sort(int[] data); ck-ab0n
} fx&b*OC
]B'Ac%Rx
public static void swap(int[] data, int i, int j) { y5;l?v94
int temp = data; $2u^z=`b!%
data = data[j]; HPT{83
data[j] = temp; i[obQx S94
} U40adP? a
} Jj=0{(X