[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; %-J}m
} ;:A/WU.^
int i1=l; 3s B9t X
int i2=mid+1; .TpM3b#r
for(int cur=l;cur<=r;cur++){ /=IBK`
if(i1==mid+1) &~{0@/
data[cur]=temp[i2++]; I:Q3r"1
else if(i2>r) cfhiZ~."T
data[cur]=temp[i1++]; !l5&>1?
else if(temp[i1] data[cur]=temp[i1++]; '}BYMEd/m%
else 8qF OO3c\V
data[cur]=temp[i2++]; @h)Z8so
} Nm4 h
} NPjNkpWm&=
"p\5:<
} tx_h1[qi
h= Mmd
改进后的归并排序: 'LW~_\
eB2a1<S&@
package org.rut.util.algorithm.support; $;VY`n
4IGn,D^
import org.rut.util.algorithm.SortUtil; /n-!dXi
o7sIpE9
/** - xKa-3
* @author treeroot =GJ)4os
* @since 2006-2-2 ~b;u1;ne
* @version 1.0 .h r$<]
*/ '<-F3
public class ImprovedMergeSort implements SortUtil.Sort { 'gv~M_
=+ALh-
private static final int THRESHOLD = 10; Cr>YpWm
9AP."RV
/* *w5xC5*
* (non-Javadoc) tLSM]Q
* :TkR]bhm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y^[?F>wB
*/ :[d*
public void sort(int[] data) { GMOnp$@H^s
int[] temp=new int[data.length]; =";G&)H-
mergeSort(data,temp,0,data.length-1); d8ck].m=
} ni~1)"U.
_MxKfah'
private void mergeSort(int[] data, int[] temp, int l, int r) { R?5v//[
int i, j, k; `/RcE.5n\@
int mid = (l + r) / 2; g(QT"O!dY
if (l == r) |{ TVW
return; -F`uz,wZ
if ((mid - l) >= THRESHOLD) K.r "KxCm|
mergeSort(data, temp, l, mid); BRTCo,i
else G/4~_\YMq
insertSort(data, l, mid - l + 1); D/&nEMp6
if ((r - mid) > THRESHOLD) T0v{qQ
mergeSort(data, temp, mid + 1, r); G7SmlFn?
else ;GV~MH-F
insertSort(data, mid + 1, r - mid); [5i}C K_=
Q/]t$
for (i = l; i <= mid; i++) { MHPh!
temp = data; hp3 <HUU
} 2#)z%K6T
for (j = 1; j <= r - mid; j++) { ioJ|-@!#o
temp[r - j + 1] = data[j + mid]; JyDg=%-$2
} "|nh=!L
int a = temp[l]; (8Q*NZ
int b = temp[r]; `"h[Xb#A`b
for (i = l, j = r, k = l; k <= r; k++) { we&D"V
if (a < b) { cH6<'W{*
data[k] = temp[i++]; +<rWYF(ii/
a = temp; Gc,6;!+(
} else { -=4{X R3
data[k] = temp[j--]; HyC826~-rI
b = temp[j]; p5`={'>-
} 7u<C&Z/
} P-?R$QYtR
} U0@Qc}y
g]Z@_
/** 6H^=\
* @param data Dks"(0g
* @param l _fjHa6S
* @param i ^8V8,C)
*/ /Y0oA3am
private void insertSort(int[] data, int start, int len) { @TvDxY1)6Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i%n9RuULh
} |31/*J!@z*
} UH`cWVLpr
} H:]'r5sw
} ^*'fDP*
0JU+v:J[=
堆排序： $ #bWh
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package org.rut.util.algorithm.support; H8V@KB
`=P=i>,
import org.rut.util.algorithm.SortUtil; P2g}G4qf
6Sz|3ms
/** 1~y\MD*-j
* @author treeroot e'T|5I0K
* @since 2006-2-2 D9%t67s
* @version 1.0 )QW p[bV
*/ ZmAo9>'Kg
public class HeapSort implements SortUtil.Sort{ @n^2UJ
q{uv?{I
/* (non-Javadoc) ;( [^+_/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a[ yyEgm2
*/ y`a]##1j$M
public void sort(int[] data) { mGh8/Xt
MaxHeap h=new MaxHeap(); V6kJoSyde
h.init(data); dmPAPCm%y
for(int i=0;i h.remove(); s|D[_N!|
System.arraycopy(h.queue,1,data,0,data.length); &Ivf!Bgm{Z
} -+fW/Uo
k{J$z
private static class MaxHeap{ pcNpr`
>l^[73,]L
void init(int[] data){ &0RKNpwg
this.queue=new int[data.length+1]; .f9&.H#
for(int i=0;i queue[++size]=data; j5!pS xOC
fixUp(size); =y0h\<[
} M.``o1b
} K$c?:?wmo
,:xses*7
private int size=0; ,SH^L|I
p9[gG\
private int[] queue; !@[@&.
e'2w-^7
public int get() { _Lgi5B%
return queue[1]; ( "wmc"qH
} ~F[JupU
hVW1l&s
public void remove() { B3W2?5p
SortUtil.swap(queue,1,size--); 51 "v`O+
fixDown(1); o[aIQ|G
} ?0?+~0sI
file://fixdown ^?S lM
private void fixDown(int k) { thSXri?kl
int j; YP73
while ((j = k << 1) <= size) { Ww =ksggpB
if (j < size %26amp;%26amp; queue[j] j++; ZY*_x)h+#7
if (queue[k]>queue[j]) file://不用交换 (97&mhs3
break; tZygTvK/S
SortUtil.swap(queue,j,k); ^K0oJg.E
k = j; OjsMT]
} y*T@_on5
} 8qwPk4
private void fixUp(int k) { wit
while (k > 1) { glZjo
int j = k >> 1; ld7B{ ?]
if (queue[j]>queue[k]) kiu#THF
break; ^zKP5nzL
SortUtil.swap(queue,j,k); XGAR8=tic
k = j; uQ3W =
} }*c[}VLN
} ne# %Gr
+HEL^
} ,'byJlw_pv
:nS p
} 3j\Py'};
&IP`j~b
SortUtil： Q+p9^_r
tS[%C)
package org.rut.util.algorithm; E&0]s
naM=oSB(
import org.rut.util.algorithm.support.BubbleSort; D<lVWP
import org.rut.util.algorithm.support.HeapSort; :oytJhxU
import org.rut.util.algorithm.support.ImprovedMergeSort; =xr2-K)e
import org.rut.util.algorithm.support.ImprovedQuickSort; m6o o-muAr
import org.rut.util.algorithm.support.InsertSort; ;-VXp80J
import org.rut.util.algorithm.support.MergeSort; H(DI /"N
import org.rut.util.algorithm.support.QuickSort; gH/(4h
import org.rut.util.algorithm.support.SelectionSort; <*z9:jzQ
import org.rut.util.algorithm.support.ShellSort; a 1~@m[
bdj')%@n
/** * & : J
* @author treeroot oT- Y
* @since 2006-2-2 Vo9FlYj
* @version 1.0 8*EqG5OP
*/ K<p)-q
public class SortUtil { 9^@#Ua
public final static int INSERT = 1; u(~(+1W
public final static int BUBBLE = 2; R]NCD*~
public final static int SELECTION = 3; KP CZiu7
public final static int SHELL = 4; %Vhj<gN
public final static int QUICK = 5; Thuwme
public final static int IMPROVED_QUICK = 6; 9G)fJr[c
public final static int MERGE = 7; xpWY4Q
public final static int IMPROVED_MERGE = 8; &G_XgQsg{
public final static int HEAP = 9; e|4U2\&3y
i}~U/.P
public static void sort(int[] data) { \N.Bx
sort(data, IMPROVED_QUICK); 'h>CgR^NM1
} =W"9a\m
private static String[] name={ cD9.L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K%YR; )5A
}; C:RA(
\iAs
private static Sort[] impl=new Sort[]{ C,,S<=L:
new InsertSort(), B1va]=([)W
new BubbleSort(), 07>Iq8<mu
new SelectionSort(), H'jo3d~+
new ShellSort(), CPJ%<+4%b
new QuickSort(), jR"ACup(
new ImprovedQuickSort(), <1E5[9 q
new MergeSort(), ^F87gow%`B
new ImprovedMergeSort(), G`z=qaj
new HeapSort() ' [%?j?2r
}; ( c +M"s
F+/#ugI
public static String toString(int algorithm){ 4]no#lVRJ
return name[algorithm-1]; *C,1x5
} <h*$bx]9 +
~X,ZZ 9H
public static void sort(int[] data, int algorithm) { Ki\J)l
impl[algorithm-1].sort(data); p*~b5'+ C+
} N2&h yM
K5 Z'kkOk
public static interface Sort { AX6l=jFZx
public void sort(int[] data); BCt>P?,UO
} -fDW>]_
<,Fj}T-
public static void swap(int[] data, int i, int j) { !gj_9"<
int temp = data; $`_xP1bUT
data = data[j]; #{zF~/Qq
data[j] = temp; T26'b .
} GhW{6.^
} K&up1nZ@(