[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; HYJEz2RF
} I&&;a.
int i1=l; $RC)e7
int i2=mid+1; OSJj^Y)W|
for(int cur=l;cur<=r;cur++){ 1p-<F3;
if(i1==mid+1) 9A`^(
data[cur]=temp[i2++]; 79jnYjk
else if(i2>r) c[vFh0s"m
data[cur]=temp[i1++]; 3Zpq#
else if(temp[i1] data[cur]=temp[i1++]; Smh=Q4,W
else !"F8jA}
data[cur]=temp[i2++]; %_39Wa
} ^7:UC\_
} eG dFupfz
/p}pdXS
} X7?14W
fNrpYR X
改进后的归并排序: x.I?)x!C'
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package org.rut.util.algorithm.support; 3r?T|>|
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import org.rut.util.algorithm.SortUtil; Ty;^3
6jov8GIAt
/** SK@lr
* @author treeroot |uM=pm;H
* @since 2006-2-2 <c,iu{:
* @version 1.0 zvv/|z2(r
*/ xHkxrXqeI
public class ImprovedMergeSort implements SortUtil.Sort { VAdUd {
NR^3 1&}It
private static final int THRESHOLD = 10; I3ugBLxVC3
A#F6~QX(.9
/* ZV-Yq !|t
* (non-Javadoc) qzu(4*Gk6
* #zb67mg~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z|3[Y@c\
*/ LZJFp@
public void sort(int[] data) { lvR>%I0`*
int[] temp=new int[data.length]; 5VGZ5,+<<
mergeSort(data,temp,0,data.length-1); Ozsvsa
} Xw162/:h
g(o^'f
private void mergeSort(int[] data, int[] temp, int l, int r) { 6x16?x
int i, j, k; J[\8:qE
int mid = (l + r) / 2; :4Y5
if (l == r) B2)5Z]
return; Q6r
if ((mid - l) >= THRESHOLD) ]];LA!n
mergeSort(data, temp, l, mid); 7Ewq'Vu`y
else Jg6@)<n
insertSort(data, l, mid - l + 1); ;"NW=P&
if ((r - mid) > THRESHOLD) J(,{ -d-E
mergeSort(data, temp, mid + 1, r); a0`(*#P
else "~08<+
insertSort(data, mid + 1, r - mid); c$;Cpt@-j
byk9"QeY\
for (i = l; i <= mid; i++) { {@t6[g++
temp = data; W;F=7[h
} J2!)%mF$
for (j = 1; j <= r - mid; j++) { c <X( S
temp[r - j + 1] = data[j + mid]; [3v&j_
} OXV9D:bIa
int a = temp[l]; G~f|Sx
int b = temp[r]; 22EI`}"J
for (i = l, j = r, k = l; k <= r; k++) { b C"rQJg
if (a < b) { k!g%vx
data[k] = temp[i++]; ca'c5*Fs
a = temp; Et;Ubj"+
} else { j__l'?s
data[k] = temp[j--]; lQVK~8t3
b = temp[j]; Mw6 Mt
} $$T a
} tG0 &0`
} S6{y%K2y&
)kE1g&
/** Bdib)t[
* @param data R`%O=S*]
* @param l yDi'@Z9R?
* @param i k.%FGn'fR
*/ ~01t_Xp qc
private void insertSort(int[] data, int start, int len) { [4mIww%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ro#O{
} LUA<N:
} A/~^4DR
} 7fW$jiw
} 9lqD~H.
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堆排序： 4`:Eiik&p
#D%l;Ae
package org.rut.util.algorithm.support; is{H >#+"
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import org.rut.util.algorithm.SortUtil; oox;8d4}y
ezhK[/E=
/** }t1J`+x%
* @author treeroot Qt=OiKZ
* @since 2006-2-2 W'Y#(N[ktP
* @version 1.0 4z^VwKH\j
*/ &C6*"JZ4
public class HeapSort implements SortUtil.Sort{ S|_"~Nd=
KtaoU2s
/* (non-Javadoc) 1sXVuto
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >NtJ)N*
*/ G=m18Bv{
public void sort(int[] data) { mzn#4;m$
MaxHeap h=new MaxHeap(); W;.LN<bx
h.init(data); q]gF[&QZ
for(int i=0;i h.remove(); *,e`.
System.arraycopy(h.queue,1,data,0,data.length); eY(JU5{
} v@qVT'qlU
K^c%$n:}+
private static class MaxHeap{ f|{&Y2h(R
#!w7E,UBi
void init(int[] data){ v.>95|8
this.queue=new int[data.length+1]; [9~6, ;6
for(int i=0;i queue[++size]=data; nOU.=N v`
fixUp(size); *YP;HL
} H) q_9<;
} ;sY n=r
4R9y~~+
private int size=0; +<sv/gEt
Vd A!tL
private int[] queue; CD)JCv
{br6*
public int get() { y2>AbrJ
return queue[1]; \!4_m8?
} gLWbd~
pUeok+k_
public void remove() { gO_d!x*
SortUtil.swap(queue,1,size--); rC6{-42bb
fixDown(1); 1-8G2e
} *NoixV1>
file://fixdown w*gG1BV
private void fixDown(int k) { XK/bE35%^!
int j; b4>1UZGW-
while ((j = k << 1) <= size) { Url8&.pw
if (j < size %26amp;%26amp; queue[j] j++; lT;uL~j
if (queue[k]>queue[j]) file://不用交换 Di&XDW/
break; j2=|,AmC
SortUtil.swap(queue,j,k); n?8xRaEf
k = j; 1oL3y;>iL
} h&:XO9dY
} ?GeMD /]
private void fixUp(int k) { {w<"jw&2
while (k > 1) { F;Bq[V)R
int j = k >> 1; 0!q@b
if (queue[j]>queue[k]) yjIA`5^
break; kB_T9$0e#
SortUtil.swap(queue,j,k); =$\9t$A
k = j; SF[}suL
} :[ll$5E.
} J{PNB{v
G@o\D-$
} $)VnHr `hy
uS5ADh
} N$<R6DU]K
J(Zz^$8]<?
SortUtil： }KR"0G[f
Z^#u n
package org.rut.util.algorithm; uMK8V_p*?
75H;6(7
import org.rut.util.algorithm.support.BubbleSort; 1abQoe
import org.rut.util.algorithm.support.HeapSort; B$_-1^L e
import org.rut.util.algorithm.support.ImprovedMergeSort; !qug^F
import org.rut.util.algorithm.support.ImprovedQuickSort; #?7g_
import org.rut.util.algorithm.support.InsertSort; ?~tx@k$;Es
import org.rut.util.algorithm.support.MergeSort; f<3lxu
import org.rut.util.algorithm.support.QuickSort; af}JS2=$
import org.rut.util.algorithm.support.SelectionSort; #:tC^7qk
import org.rut.util.algorithm.support.ShellSort; y`8jz,&.
mtVoA8(6
/** h<bCm`qj
* @author treeroot j-7aJj%
* @since 2006-2-2 8_T9[]7V8
* @version 1.0 \n^;r|J7k
*/ mQ^SpK #
public class SortUtil { xtzkgb,0[
public final static int INSERT = 1; Ui`#B
public final static int BUBBLE = 2; >lF@M-
public final static int SELECTION = 3; ricL.[v9S
public final static int SHELL = 4; ) RNB;K~s9
public final static int QUICK = 5; ma@!"Z8S
public final static int IMPROVED_QUICK = 6; JHg y&/
public final static int MERGE = 7; %g~zEa-g
public final static int IMPROVED_MERGE = 8; lec3rv0)
public final static int HEAP = 9; |*N;R+b
N@V:nCl
public static void sort(int[] data) { LU+}iA)
sort(data, IMPROVED_QUICK); Q 6dqFnz
} a( SJ5t?-2
private static String[] name={ oH(=T/{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o~26<Lk
}; ^n*:zmD
c uHF^l
private static Sort[] impl=new Sort[]{ ^#4Ah[:XA
new InsertSort(), cueaOtD
new BubbleSort(), 4X5KrecNr
new SelectionSort(), nRs:^Q~o
new ShellSort(), M[ ON2P;
new QuickSort(), ^SW0+O
new ImprovedQuickSort(), B{>x
new MergeSort(), |cL,$G
new ImprovedMergeSort(), zEYQZywc
new HeapSort() k\\e`=
}; `Nv P)|
#{@qC2!2/
public static String toString(int algorithm){ _,3%)sn-)
return name[algorithm-1]; n2Ew0-
} :}-izd)/j
C~T*Wlk
public static void sort(int[] data, int algorithm) { C0CJ;
impl[algorithm-1].sort(data); &!B4v<#,U
} 5. +_'bF|
+-qa7
public static interface Sort { nxe9^h7m
public void sort(int[] data); 9s?gI4XN
} Op:$7hv
Bv#?.0Ez;
public static void swap(int[] data, int i, int j) { huvn_
int temp = data; rTim1<IXR
data = data[j]; H{1'- wB
data[j] = temp; _}tPtHPa/
} B(Er/\-@U
} HJt '@t=Ak