[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; ,/|"0$p2x
} Q9X_aB0
int i1=l; WU{G_Fqaz
int i2=mid+1; sBq @W4
for(int cur=l;cur<=r;cur++){ qJVW :$1q
if(i1==mid+1) <"AP&J'H
data[cur]=temp[i2++]; J^ryUOo}b
else if(i2>r) ,S:LhgSP
data[cur]=temp[i1++]; Fc7mAV=
else if(temp[i1] data[cur]=temp[i1++]; @xB"9s
else kfg9l?R$I<
data[cur]=temp[i2++]; vz,l{0v
} .'p_j(uv
} +l2{EiQw
<y\>[7Y
} L$l'wz
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改进后的归并排序: [$]vi`c2
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package org.rut.util.algorithm.support; a*NcL(OC
&I:5<zK{
import org.rut.util.algorithm.SortUtil; %-i2MK'A
4{X5ZS?CkI
/** 5)2lZ(5.A#
* @author treeroot zy8W8h(?
* @since 2006-2-2 +I5@Gys
* @version 1.0 eL#pS=
*/ R.!'&<Svq
public class ImprovedMergeSort implements SortUtil.Sort { -j`tBv)
5"c#OU
private static final int THRESHOLD = 10; :U0z;
HzF
/* B~V^?."
* (non-Javadoc) 41^+T<+
* 7<mY{!2iF?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h:<pEL
*/ !BP/#
public void sort(int[] data) { 60*2k
int[] temp=new int[data.length]; Aj;Z &
mergeSort(data,temp,0,data.length-1); !TVlsm
} F# y5T3(P
zdzTJiY2[Z
private void mergeSort(int[] data, int[] temp, int l, int r) { \eT0d<
int i, j, k; Im+<oZ
int mid = (l + r) / 2; TPt<(-}W
if (l == r) /^G1wz2
return; OSK3X Qc
if ((mid - l) >= THRESHOLD) AwAUm 2^
mergeSort(data, temp, l, mid); `!kOyh:X
else CQW#o_\
insertSort(data, l, mid - l + 1); {l%Of
if ((r - mid) > THRESHOLD) ,H2[["1DH
mergeSort(data, temp, mid + 1, r); [:
else i!LEA/"V
insertSort(data, mid + 1, r - mid); Z[RE|l{
=[FNZ:3
for (i = l; i <= mid; i++) { :,Q\!s!
temp = data; ly7\H3
} "H" 4(3
for (j = 1; j <= r - mid; j++) { ;x$,x-
temp[r - j + 1] = data[j + mid]; Jv %,v?
} \ty{KAc&
int a = temp[l]; b<P9@h~:
int b = temp[r]; Q.>@w<[!L
for (i = l, j = r, k = l; k <= r; k++) { <[@AMdS
if (a < b) { )/1AF^ E
data[k] = temp[i++]; >u ,Ac:
a = temp; xqs{d&W
} else { ztKmB
data[k] = temp[j--]; [ma'11?G
b = temp[j]; WolkW:(Cg
} :Gsh
} [KLs} ~H
} d`5xd@p
KaNi'=nW
/** PxNp'PZr9
* @param data --4,6va`e
* @param l 3s<~}&"
* @param i zt/b S/
*/ ?'Y\5n/*$
private void insertSort(int[] data, int start, int len) { Ly"u }e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); eY)ugq>'
} pwtB{6)VH{
} oDogM`T`
} {`2! 3= "
} T!0o(Pp<
rkugV&BhV
堆排序： )y4bb^;z
ON.C%-T-
package org.rut.util.algorithm.support; 3gV 17a
XZD9vFj1Z
import org.rut.util.algorithm.SortUtil; zePVB-@u
2a|9D\
/** As }:~Jy|
* @author treeroot FNL[6.!PV
* @since 2006-2-2 ?{[ISk)
* @version 1.0 M{cF14cQ
*/ tPBr{
public class HeapSort implements SortUtil.Sort{ _y*@Hj
Mrysy)x
/* (non-Javadoc) %N$,1=0*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D!Pv`wm
*/ v W=$C
public void sort(int[] data) { HX%lL}E
MaxHeap h=new MaxHeap(); F7P?*!dx
h.init(data); KX D&FDkF
for(int i=0;i h.remove(); M3P\1
System.arraycopy(h.queue,1,data,0,data.length); yB0xa%
} 3tzb@T
.sI*\@w.
private static class MaxHeap{ Yef=HSzo
}%Mj`Bh
void init(int[] data){ <qJI]P
this.queue=new int[data.length+1]; FcVQ_6
for(int i=0;i queue[++size]=data; P'%#B&LZo
fixUp(size); dO]N&'P7
} R+{QZ'K.qg
} {w:*t)@j
U4)x"s[CP
private int size=0; :0@R(ct;>
H@Yj
private int[] queue; @`R#t3)8JP
KZrg4TEVi
public int get() { a,mG5bQ!
return queue[1]; r&
} .TZ0FxW
S:2M9nC
public void remove() { _=0%3Sh
SortUtil.swap(queue,1,size--); )45~YDS;t
fixDown(1); cHo@F!{o=
} NZT2ni4
file://fixdown WV5z~[
private void fixDown(int k) { #J=^CE
int j; v~E\u
while ((j = k << 1) <= size) { )S?.YCv?
if (j < size %26amp;%26amp; queue[j] j++; 6d~[j<@2
if (queue[k]>queue[j]) file://不用交换 N{+6V`\
break; :&SvjJR
SortUtil.swap(queue,j,k); p G|-<6WY
k = j; ~EIK
} |Y|6`9;
} QAGR\~
private void fixUp(int k) { cPaz-
while (k > 1) { 9dS<^E(ZF
int j = k >> 1; cdd6*+E
if (queue[j]>queue[k]) 3oD?e
break; Rhi`4wo0$
SortUtil.swap(queue,j,k); ?e=3G4N
k = j; oF'_x,0
} pQ~Y7
} @M( hyS&on
s Zn@ye^
} N"/J1
Pgug!![
} `U4e]Qh/+
{7d(B1[1
SortUtil： 1fgO3N
i ZU1w7Z
package org.rut.util.algorithm; unX mMSz(
pW4O[v`
import org.rut.util.algorithm.support.BubbleSort; xWRkg$A
import org.rut.util.algorithm.support.HeapSort; T-MC|>pv
import org.rut.util.algorithm.support.ImprovedMergeSort; FYBW3y+AF&
import org.rut.util.algorithm.support.ImprovedQuickSort; % 9Jx|
import org.rut.util.algorithm.support.InsertSort; >wSrllmj@
import org.rut.util.algorithm.support.MergeSort; !2=m |,
import org.rut.util.algorithm.support.QuickSort; GN1Q\8)o
import org.rut.util.algorithm.support.SelectionSort; %Z~0vwY
import org.rut.util.algorithm.support.ShellSort; &VPfI
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/** ,"en7
* @author treeroot 7a0T]
* @since 2006-2-2 c"*xw8|
* @version 1.0 ]g] ]\hS
*/ }BYs.$7
public class SortUtil { . E8Gj'yO
public final static int INSERT = 1; DXF>#2E^+
public final static int BUBBLE = 2; My6a.Kl
public final static int SELECTION = 3; .gQYN2#zb
public final static int SHELL = 4; aU\R!Y$/"
public final static int QUICK = 5; f]sc[_n]
public final static int IMPROVED_QUICK = 6; \wR;N/tg
public final static int MERGE = 7; '@6O3z_{
public final static int IMPROVED_MERGE = 8; S =5br
public final static int HEAP = 9; 3g79/w
%+pF4f8]
public static void sort(int[] data) { _-=yD@;[D
sort(data, IMPROVED_QUICK); _^ZBSx09)
} 5ho!}K
private static String[] name={ c)`=wDi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,7:?Du}
}; ee2k..Tq#
\+Nn>wW.
private static Sort[] impl=new Sort[]{ -3GlpC22
new InsertSort(), `; +UWdAR
new BubbleSort(), "?AJ(>wP
new SelectionSort(), fphi['X
new ShellSort(), /OD@Xl];K
new QuickSort(), MV.&GUez{
new ImprovedQuickSort(), 9P1!<6mN\
new MergeSort(), Zdfruzl&`
new ImprovedMergeSort(), ]Uj7f4)k
new HeapSort() .;J6)h
}; vu@@!cT6e
[,yYr
public static String toString(int algorithm){ @1vpkB~ w
return name[algorithm-1]; )+ (GE
} gmUX 2x(
vqhu%ZyP
public static void sort(int[] data, int algorithm) { _uL8TC^
impl[algorithm-1].sort(data); ^ *1hz<
} 0/5{v6_rG
d_1uv_P
public static interface Sort { GIM'H;XG
public void sort(int[] data); #O1%k;BL
} mS?W+jy%
dbG902dR
public static void swap(int[] data, int i, int j) { G2 0
int temp = data; ]?*'[
data = data[j]; wh2Ljskda8
data[j] = temp; b"JX6efnN
} h+DK .$
} c#zx" ,K