[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; \}Al85
} ~jR4%VF
int i1=l; /wI"oHZd
int i2=mid+1; K2> CR$L
for(int cur=l;cur<=r;cur++){ CBr(a'3{Z
if(i1==mid+1) 3%[;nhbA7
data[cur]=temp[i2++]; g2;lEW
else if(i2>r) n "bii7h
data[cur]=temp[i1++]; #PkZi(k hv
else if(temp[i1] data[cur]=temp[i1++]; W=:AOBK
else lsaA
data[cur]=temp[i2++]; U EjP`
} ;aN_!! r
} 5MCnGg@
QdrZi.qKH
} nSv@FT'~z
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改进后的归并排序: Yu$QL@
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package org.rut.util.algorithm.support; >t_h/:JZ)
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import org.rut.util.algorithm.SortUtil; \i'Z(1
R*=88ds
/** FS)"MDs
* @author treeroot 'eo/"~/*w
* @since 2006-2-2 ;,}Dh/&E
* @version 1.0 [=BccT:b
*/ ,gpZz$Ef(
public class ImprovedMergeSort implements SortUtil.Sort { rJ)j./c
fDwK5?
private static final int THRESHOLD = 10; 4_`(c1oA
UCt}\IJ
/* /go|r '
* (non-Javadoc) )qRH?Hsb7
* "Ccyj/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 16ZyLt
*/ F8S>Ld
public void sort(int[] data) { \%|Xf[AX
int[] temp=new int[data.length]; PjD9D.
mergeSort(data,temp,0,data.length-1); ;1HzY\d%<
} q6,z 1A"
?I[*{}@n"
private void mergeSort(int[] data, int[] temp, int l, int r) { : eCeJ~&E
int i, j, k; Sv_Nb>
int mid = (l + r) / 2; 0|Xz-Y
if (l == r) f"*k>=ETI
return; =C2KHNc
if ((mid - l) >= THRESHOLD) iF9d?9TWl
mergeSort(data, temp, l, mid); hvGD`
else VsJiE0'%
insertSort(data, l, mid - l + 1); 9Pb6Z}
if ((r - mid) > THRESHOLD) L#",.x
mergeSort(data, temp, mid + 1, r); 35Yf,@VO
else nwp(% fBo
insertSort(data, mid + 1, r - mid); gBky ZK
.g3=L
for (i = l; i <= mid; i++) { &7i&"TNptP
temp = data; %q}[ZD/HD
} /w1M%10
for (j = 1; j <= r - mid; j++) { E.Q]X]q
temp[r - j + 1] = data[j + mid]; 1uO2I&B
} :KgH7s}
int a = temp[l]; F"bz<{
int b = temp[r]; ?j0yT@G
for (i = l, j = r, k = l; k <= r; k++) { &s(J:P$!
if (a < b) { =W &Mt
data[k] = temp[i++]; V2!0),]B
a = temp; !> =ybRe
} else { 64mg:ed&
data[k] = temp[j--]; *s,[Uy![
b = temp[j]; lLp,sNAj
} RC/45:hZZ
} (6.uNLr
} f~F{@),acZ
9b/Dswxjx
/** [}YUi>NGA
* @param data @ 5^nrB
* @param l -OSj<m<
* @param i ^DN:.qQ
*/ 8L,=Eap
private void insertSort(int[] data, int start, int len) { %@Z;;5L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FpiTQC7d
} b8e\(Dww
} V"Z8-u
} <|3%}?
} (-g*U#
1$8@CT^m
堆排序： Z2gWa~dBC
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package org.rut.util.algorithm.support; <)p.GAZ
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import org.rut.util.algorithm.SortUtil; 1_<x%>zG
59O-"Sc[
/** o//h|fU@
* @author treeroot b,^Gj]7
* @since 2006-2-2 'Y/0:)
* @version 1.0 kDE-GX"Y
*/ i1|>JM[V
public class HeapSort implements SortUtil.Sort{ dYwkP^KB
S~i9~jA
/* (non-Javadoc) 0muC4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B ytx.[zbX
*/ Y@`uBB[
public void sort(int[] data) { U fyhd
MaxHeap h=new MaxHeap(); 6,A|9UX=`
h.init(data); d?8OY
for(int i=0;i h.remove(); *m}8L%<HT
System.arraycopy(h.queue,1,data,0,data.length); X>Vc4n<}
} =w!ik9
~x^y5[5{
private static class MaxHeap{ Wk<fNHg
u0h%4f!X
void init(int[] data){ w.-x2Zg},
this.queue=new int[data.length+1]; _"ciHYHBQ
for(int i=0;i queue[++size]=data; cvaG[NF
fixUp(size); l[Z o,4*
} A<ds+0
} uYMn VE"
Xj 1Oxm42
private int size=0; :YI5O/gsk?
=3.dgtH
private int[] queue; wX0D^)NtF
kU[hB1D5
public int get() { F#gA2VCm
return queue[1]; l!f_ +lv
} q1T)H2S
lN#j%0MaUo
public void remove() { {5~h
SortUtil.swap(queue,1,size--); F(yR\)!C
fixDown(1); 68XJ`/d
} c|k_[8L
file://fixdown Cgx:6TRS
private void fixDown(int k) { k1<^Ept
int j; `Pvi+:6\Y
while ((j = k << 1) <= size) { 8f9wUPr
if (j < size %26amp;%26amp; queue[j] j++; Hw o _;fV
if (queue[k]>queue[j]) file://不用交换 LUbj^iQ9
break; DjM*U52Yfj
SortUtil.swap(queue,j,k); sfyLG3$/
k = j; NX&dJ 6a
} He(65ciT<O
} Jy)=TJ!y
private void fixUp(int k) { w'K7$F51
while (k > 1) { CefFUqo4
int j = k >> 1; TQ]gvi|m
if (queue[j]>queue[k]) +@QrGY
break; (oGYnN,2
SortUtil.swap(queue,j,k); }PBme'kP
k = j; ENZym
} c!ZZMCs
} k( :Bl
rLsY_7!
} E`o_R=%
/_0B5,6R
} ,`}yJ*7
pUHgjwT'U
SortUtil： "E\vdhk
,~Mf2Y#m0p
package org.rut.util.algorithm; %JM$]
zMv`<m%
import org.rut.util.algorithm.support.BubbleSort; -D~K9u]U_
import org.rut.util.algorithm.support.HeapSort; VcrMlcnO
import org.rut.util.algorithm.support.ImprovedMergeSort; @Chl>s
import org.rut.util.algorithm.support.ImprovedQuickSort; $|=|"/
import org.rut.util.algorithm.support.InsertSort; &<N8d(
import org.rut.util.algorithm.support.MergeSort; zR<{z
import org.rut.util.algorithm.support.QuickSort; )#m{"rk[x,
import org.rut.util.algorithm.support.SelectionSort; |M;Nq@bRv
import org.rut.util.algorithm.support.ShellSort; gw)4P tb!
,D;8~llM
/** \}$|Uo$O
* @author treeroot dPEDsG0$a
* @since 2006-2-2 ^3dc#5]Xf
* @version 1.0 I{89chi
*/ q`1tUd4G
public class SortUtil { #kv9$
public final static int INSERT = 1; 8g0 #WV
public final static int BUBBLE = 2; nK;d\DO
public final static int SELECTION = 3; y|| n9
public final static int SHELL = 4; 9i\RdJv.
public final static int QUICK = 5; 6\.g,>
public final static int IMPROVED_QUICK = 6; kH eD(Ea
public final static int MERGE = 7; j2D!=PK;
public final static int IMPROVED_MERGE = 8; I6^y` 2X
public final static int HEAP = 9; /(^-=pAX
4;6"I2;zfG
public static void sort(int[] data) { =3035{\
sort(data, IMPROVED_QUICK); PaaMh[OmG
} B~I ]3f
private static String[] name={ E{T3Xwg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |KhpF1/(
}; {'{}@CuA2
hoFgs9
private static Sort[] impl=new Sort[]{ jA1S|gV
new InsertSort(), xRWfZ3E#
new BubbleSort(), oDZZ
new SelectionSort(), TB>_#+:
new ShellSort(), aH"d~Y^
new QuickSort(), #`_W?-%^
new ImprovedQuickSort(), K6->{!8]k
new MergeSort(), ]V/5<O1
new ImprovedMergeSort(), 8XH;<z<oJ
new HeapSort() E:9RskI
}; DghyE`
>&.N_,*
public static String toString(int algorithm){ w~+*Vd~U
return name[algorithm-1]; D+!T5)>(
} K}cZK
&>c=/]Lop
public static void sort(int[] data, int algorithm) { 7**zb"#y
impl[algorithm-1].sort(data); j0L%jz
} &b@_ah+f
K>'4^W5d,
public static interface Sort { xQZOGq
public void sort(int[] data); %1{S{FB
} lz`\Q6rZ
&- p(3$jn7
public static void swap(int[] data, int i, int j) { ~~{lIO)&
int temp = data; |KJGM1]G
data = data[j]; r3Ol?p
data[j] = temp; YHN6/k7H
} f4S}Nga(
} oT}$N_gFT