[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; y:;.r:
} 9;@p2t*v
int i1=l; %O\@rws
int i2=mid+1; q1}!Okr"2
for(int cur=l;cur<=r;cur++){ xuioU
if(i1==mid+1) yvd)pH<a2
data[cur]=temp[i2++]; 5BVvT `<
else if(i2>r) p!UR;xHI\
data[cur]=temp[i1++]; rwP#Yj[BK+
else if(temp[i1] data[cur]=temp[i1++]; I"Zp^j
else w(oK
data[cur]=temp[i2++]; WNyW1?"
} !VGG2N8
} =[(34#
&QHJ%c
} S/]\GG{
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改进后的归并排序: Z8SwW<{ $
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package org.rut.util.algorithm.support; =QqH`.3
kXz~ez 7
import org.rut.util.algorithm.SortUtil; z<%P"
Q-<]'E#\(
/** 6 5govor
* @author treeroot luoQ#1F?sl
* @since 2006-2-2 MmT/J1zM
* @version 1.0 I*u3e
*/ ^ij0<*ca9
public class ImprovedMergeSort implements SortUtil.Sort { bZ`v1d (r
@:>"VP<(
private static final int THRESHOLD = 10; hYJzF.DW<$
u$T]A8e
/* p<fCGU
* (non-Javadoc) :q9!
* ~i.*fL_Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <],{at` v
*/ <M:BN6-yG
public void sort(int[] data) { *ID=X!v
int[] temp=new int[data.length]; UoT`/.
mergeSort(data,temp,0,data.length-1); ]\pi!oa
} =D1
T[\1=h]
private void mergeSort(int[] data, int[] temp, int l, int r) { HI8mNX3 "j
int i, j, k; t13V>9to
int mid = (l + r) / 2; Z[?n{vD7
if (l == r) L`1 ITz
return; `5Y*) q
if ((mid - l) >= THRESHOLD) !ho^:}m
mergeSort(data, temp, l, mid); NEq_!!/sF
else h^3gYL7O6
insertSort(data, l, mid - l + 1); zdYH9d>D
if ((r - mid) > THRESHOLD) p2STy\CS
mergeSort(data, temp, mid + 1, r); h@%Xy(/m'
else )9eIo&Nl
insertSort(data, mid + 1, r - mid); )-2Nc7
C~En0G1
for (i = l; i <= mid; i++) { hP6f
temp = data; B;9,Qbb
} SXL3>-Z E
for (j = 1; j <= r - mid; j++) { {$frR "K
temp[r - j + 1] = data[j + mid]; 4"P9z}y=i
} YC6T0m
int a = temp[l]; SzW;Yb"#^k
int b = temp[r]; si0}b~t
for (i = l, j = r, k = l; k <= r; k++) { wps/{h,
if (a < b) { 7#LIGr
data[k] = temp[i++]; x3O%W?5
a = temp; !^arWH[od
} else { R$&;
data[k] = temp[j--]; 5H3o?x
b = temp[j]; Rta}*
} /v!yI$xc
} *)K 5<}V
} Sz0PZtJ
Olzw)WjG
/** 'va[)~!
* @param data f{9+,z
* @param l xFu ,e
* @param i 0z=KnQx"4
*/ tJ(xeb
private void insertSort(int[] data, int start, int len) { owNwj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k(ouE|B
} ^>|ZN2
} (5$Ge$
} Z ]A |"6<
} XM]m%I
t&U9Z$LS
堆排序： d.&_j`\F
T<]{:\*n
package org.rut.util.algorithm.support; lNe4e6
wv\X
import org.rut.util.algorithm.SortUtil; UQ0!tFx
4=,J@N-
/** "VaWZ*
* @author treeroot o0r&w;!
* @since 2006-2-2 H!;N0",]N
* @version 1.0 VzG|Xtco[
*/ //8W">u
public class HeapSort implements SortUtil.Sort{ y [Vd*8
+<E#_)}`D6
/* (non-Javadoc) P'~`2W0sz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f`qy~M&
*/ -zK>{)Z=q
public void sort(int[] data) { D.Ke
MaxHeap h=new MaxHeap(); 9^*RK6
h.init(data); %H\b5& _y
for(int i=0;i h.remove(); R0?bcP&
System.arraycopy(h.queue,1,data,0,data.length); uda++^y:
} Cd'D ~'=
&4%pPL\f
private static class MaxHeap{ dS1HA>c)O
*R6lK&
void init(int[] data){ I_1?J* b4k
this.queue=new int[data.length+1]; Y}[<KK}_
for(int i=0;i queue[++size]=data; D`XXR}8V
fixUp(size); ;@;aeu
} ^wy
} eU"yF >6'
?+}Su'pv}
private int size=0; 9a_P 9s3w
Yc#Uu8f-
private int[] queue; 9R=avfI
ZA=J`->k
public int get() { h2Q'5G
return queue[1]; 2|k$Vfz
} t jM9EP
rxp|[>O<
public void remove() { C^q|(G)
SortUtil.swap(queue,1,size--); Jt$YSp=!!
fixDown(1); &g?GF\Y
} g1t6XVS$9
file://fixdown 3,i j@P
private void fixDown(int k) { XL*M#Jx
int j; CaYb}.:AX
while ((j = k << 1) <= size) { e=LrgRy+
if (j < size %26amp;%26amp; queue[j] j++; )?{<Tt@
if (queue[k]>queue[j]) file://不用交换 J`g5Qn@S
break; %lj5Olj
SortUtil.swap(queue,j,k); s_ZPo6p
k = j; :'DX M{
} IJf%OA>v
} &r[f ;|o
private void fixUp(int k) { \]>821r
while (k > 1) { /Am9w$_T[
int j = k >> 1; QN8+Uj/zx
if (queue[j]>queue[k]) %Z6Q/+#fn
break; 7nPg2K&
SortUtil.swap(queue,j,k); 59nRk}^$se
k = j; ]*NYuEgc
} @,<jPR.
} /3)\^Pof
FH}?QebSR
} .]>Tj^1
"I56l2dxd
} NLZ5 5yo$
:s_o'8z7L
SortUtil： wXQu%F3
qX}3}TL
package org.rut.util.algorithm; B2r[oT R
3nBZ+n4z
import org.rut.util.algorithm.support.BubbleSort; \zU<o~gs
import org.rut.util.algorithm.support.HeapSort; !v2/sq$G
import org.rut.util.algorithm.support.ImprovedMergeSort; aH;AGbp
import org.rut.util.algorithm.support.ImprovedQuickSort; e\~nqKCb
import org.rut.util.algorithm.support.InsertSort; huqtk4u
import org.rut.util.algorithm.support.MergeSort; D@p{EH
import org.rut.util.algorithm.support.QuickSort; ET^?>YsA
import org.rut.util.algorithm.support.SelectionSort; u""26k51
import org.rut.util.algorithm.support.ShellSort; X!g;;DB\
?[#w*Am7
/** TJYhgna
* @author treeroot e,Cc.T\o
* @since 2006-2-2 _V3z!aI
* @version 1.0 7s^b@&Le
*/ l]wfL;u
public class SortUtil { KS#A*BRQ
public final static int INSERT = 1; 9{(q[C5m
public final static int BUBBLE = 2; }S iR;2W
public final static int SELECTION = 3; glC,E>
public final static int SHELL = 4; (?A c`H
public final static int QUICK = 5; .]E"w9~
public final static int IMPROVED_QUICK = 6; iq3)}hGo
public final static int MERGE = 7; e oE)Mq
public final static int IMPROVED_MERGE = 8; xqSZ{E:
public final static int HEAP = 9; ?"'+tZ=f6
&wDZ@{h
public static void sort(int[] data) { z1b@JCWE
sort(data, IMPROVED_QUICK); ~g{1lcqQP
} 8$c)]Bv
private static String[] name={ e<+)IW:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]ovtH.y
}; Gt{%O>P8t
{_tq6ja-<
private static Sort[] impl=new Sort[]{ 0J?443AY
new InsertSort(), @V>]95RX
new BubbleSort(), |./:A5_h
new SelectionSort(), PM!JjMeQh
new ShellSort(), (J4( Ge
new QuickSort(), Dlz0*eHD
new ImprovedQuickSort(), v,opyTwG|
new MergeSort(), Tf=1p1!3
new ImprovedMergeSort(), ku/vV+&O
new HeapSort() h% >ZN-K)
}; AxEdQRGk
oM1C/=8
public static String toString(int algorithm){ F&`%L#s|
return name[algorithm-1]; LV ]10v6
} BZv:E?1z
u~,hTY(%
public static void sort(int[] data, int algorithm) { 0B[~j7EGO
impl[algorithm-1].sort(data); V.8Vy1$
} gs+nJ+b
H|e7IsY%
public static interface Sort { {|$kI`h,3-
public void sort(int[] data); j0"4X
} 3 }sy{Mx%9
fP 3eR>e
public static void swap(int[] data, int i, int j) { ]Ky`AG`2~
int temp = data; N MkOx$
data = data[j]; VN09g&
data[j] = temp; Qn$YI9t
} W $mw9
} d lAb`ne