[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; 4l ZK@3
} a,vS{434J
int i1=l; @5nFa~*K%
int i2=mid+1; 1]G)41
for(int cur=l;cur<=r;cur++){ >E<ib[vK[
if(i1==mid+1) HGGq;Nbm
data[cur]=temp[i2++]; ;`#R9\C=h
else if(i2>r) V+Tv:a
data[cur]=temp[i1++]; DSz[,AaR]
else if(temp[i1] data[cur]=temp[i1++]; )6)bI.BY
else G@H!D[wd
data[cur]=temp[i2++]; AVpg
} /J#(8p
} vt#;j;liG
?+d`_/IB
} <PpvVDy3
"OjAhKfG
改进后的归并排序: pIlEoG=[_
^OY]Y+S`Ox
package org.rut.util.algorithm.support; cFL~< [>_
Tzex\]fw
import org.rut.util.algorithm.SortUtil; >Wr%usNxc
sApix=Lr
/** '{d@Gc6.
* @author treeroot uNzc,OH
* @since 2006-2-2 _B^zm-}8|B
* @version 1.0 `t U
*/ lME>U_E
public class ImprovedMergeSort implements SortUtil.Sort { :skR6J
v=N?(6T
private static final int THRESHOLD = 10; A;TP~xq\
qNEp3WY:
/* j<<d A[X
* (non-Javadoc) PE%$g\#?
* }g}Eh>U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,S-h~x
*/ kTvM,<
public void sort(int[] data) { X$Vi=fvt
int[] temp=new int[data.length]; P=94
mergeSort(data,temp,0,data.length-1); &~,4$&_
} /v R>.'
ukWn@q*
private void mergeSort(int[] data, int[] temp, int l, int r) { &3Zq1o
int i, j, k; E#k{<LYI
int mid = (l + r) / 2; w_(3{P[Iz
if (l == r) wX,V:QE
return; {OU|'
if ((mid - l) >= THRESHOLD) }E 'r?N
mergeSort(data, temp, l, mid); W:]FYC
else tEhg',2t(
insertSort(data, l, mid - l + 1); A]z*#+Sl
if ((r - mid) > THRESHOLD) :?t~|7O:
mergeSort(data, temp, mid + 1, r); Gt`7i(
else }s}g}t8v-
insertSort(data, mid + 1, r - mid); r\Nfq(w
qkb'@f=
for (i = l; i <= mid; i++) { Z>rY9VvWD
temp = data; F-yY(b]$
} r"7n2
for (j = 1; j <= r - mid; j++) { b9.M'P\
temp[r - j + 1] = data[j + mid]; </h^%mnd
} ,erw(7}'.
int a = temp[l]; 1vj/6L
int b = temp[r]; uw)7N(os\`
for (i = l, j = r, k = l; k <= r; k++) { &gXh:.
if (a < b) { f[^f/jGm
data[k] = temp[i++]; 1\.$=N
a = temp; ,?fJ0n:!%
} else { YDt+1Kw}D
data[k] = temp[j--]; jwZ,_CK
b = temp[j]; OmYVJt_
} )-C3z
} IrLGAQ0
} bF'rK'',
>| R'dF}
/** 4=zs&
* @param data Ha'[uEDb
* @param l .HqFdsm
* @param i dUI5,3*
*/ ^J!q>KJs
private void insertSort(int[] data, int start, int len) { V~J5x >O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0#q=-M/?`
} x%{]'z
} ?pDr"XH~
} c0!.ei
} [6/QUD8
PNU(;&2<
堆排序： $6hPTc<C
-%K!Ra\W
package org.rut.util.algorithm.support; x&}]8S)
~Bd=]a$mj
import org.rut.util.algorithm.SortUtil; VJh8`PVX
jN=<dq ~
/** Yo-}uTkw
* @author treeroot 4E'9;tA3l
* @since 2006-2-2 ^)VwxH:s
* @version 1.0 aQk&#OQy
*/ >ZA=9v
public class HeapSort implements SortUtil.Sort{ ab0Sx
V7ph^^sC}
/* (non-Javadoc) D7Q+w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G)3I+uxn
*/ xo:kT)
public void sort(int[] data) { uOxHa>h
MaxHeap h=new MaxHeap(); tF2"IP.
h.init(data); H'+7z-%G
for(int i=0;i h.remove(); X1L@ G
System.arraycopy(h.queue,1,data,0,data.length); 4 1_gak;
} ~j0rORy]
8fR(y~_gF
private static class MaxHeap{ . ,7bGY 1$
9KSi-2?H
void init(int[] data){ g7oY1;
this.queue=new int[data.length+1]; >rnVTK
for(int i=0;i queue[++size]=data; _|HhT^\P
fixUp(size); QYJ EUC@
} "S#FI
} xNz(LZ.c
*kr/,_K
private int size=0; LQ0/oYmNc
yMs!6c*
private int[] queue; K}*ets1s}
x)5}:b1B=
public int get() { 8^mE<
return queue[1]; qsj{0Go
} M .#}
)7q$PcY
public void remove() { @sXFu[!U
SortUtil.swap(queue,1,size--); j;x()iZ<
fixDown(1); P<<$o-a"
} vSzpx
file://fixdown VK}4<u
private void fixDown(int k) { [m~J6WB
int j; Gvb2>ZN
while ((j = k << 1) <= size) { cx}Yu8
if (j < size %26amp;%26amp; queue[j] j++; 3G})$y3m
if (queue[k]>queue[j]) file://不用交换 ZR.k'
break; %L|fTndKH
SortUtil.swap(queue,j,k); h$S#fY8
k = j; MlO OB
} X1o",,N^M
} d\z6Ob"t
private void fixUp(int k) { F%>$WN#2
while (k > 1) { PN* .9;5Z
int j = k >> 1; [-~pDkf:
if (queue[j]>queue[k]) K.tNV{OL
break; *_V+K
SortUtil.swap(queue,j,k); <T2O^
k = j; E0HqXd?
} V"Q\7,_k.
} +{UY9_~\3
*A-_*A
} Z)!8a$M~
IQqUFP$8g
} .Rr^AGA4
An2>]\L
SortUtil： Y@,iDQ
*d._H1zT
package org.rut.util.algorithm; InPE_
F^,:p.ihm<
import org.rut.util.algorithm.support.BubbleSort; 1U\ap{z@
import org.rut.util.algorithm.support.HeapSort; 3%vXB=>T!
import org.rut.util.algorithm.support.ImprovedMergeSort; 87 gk
import org.rut.util.algorithm.support.ImprovedQuickSort; *-VRkS-G
import org.rut.util.algorithm.support.InsertSort; N8A)lYT]_u
import org.rut.util.algorithm.support.MergeSort; c*KE3:
import org.rut.util.algorithm.support.QuickSort; KEAXDF&#
import org.rut.util.algorithm.support.SelectionSort; wt($trJ
import org.rut.util.algorithm.support.ShellSort; -()WTdIy
~aC ?M&
/** <4r8H-(%
* @author treeroot Ai/X*y:[?
* @since 2006-2-2 \`Hp/D1
* @version 1.0 Ny^ 1#R
*/ c5]Xqq,
public class SortUtil { 9qx4F<
public final static int INSERT = 1; }:8}i;#M
public final static int BUBBLE = 2; ]4aPn
public final static int SELECTION = 3; /HIyQW\Ki-
public final static int SHELL = 4; 9f~qD&~
public final static int QUICK = 5; !y_FbJ8KC
public final static int IMPROVED_QUICK = 6; Y?^liI`#
public final static int MERGE = 7; Jr!^9i2j'
public final static int IMPROVED_MERGE = 8; $dM_uSt
public final static int HEAP = 9; Vh-8pFt
=O}I{dNKZV
public static void sort(int[] data) { CPB{eQeDuv
sort(data, IMPROVED_QUICK); 1$Hou
} !*]i3 ,{7v
private static String[] name={ 7hJX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CL0lMZ
}; 8LV6E5Q
M?l v
private static Sort[] impl=new Sort[]{ v3"6'.f;bY
new InsertSort(), aRTy=~
new BubbleSort(), [,Ehu<mEK
new SelectionSort(), $RDlM
new ShellSort(), etX@z'H
new QuickSort(), luP;P&
new ImprovedQuickSort(), IiE6i43
new MergeSort(), p]L]=-(qI
new ImprovedMergeSort(), @i#JlZM_
new HeapSort() @}y.
}; )j;^3LiV3
(zsG!v
public static String toString(int algorithm){ q7 PCMe
return name[algorithm-1]; k;\gYb%L
} {Zgd
$w(RJ/
public static void sort(int[] data, int algorithm) { ((ebSu2-?$
impl[algorithm-1].sort(data); <vcU5 .K.
} *2Pr1U
- lX4;
public static interface Sort { i q`}c |c
public void sort(int[] data); \3hA_{ w
} =~ Uhr6Q
??F* Z"x
public static void swap(int[] data, int i, int j) { ZiUb+;JA
int temp = data; vRe{B7}p;
data = data[j]; lpG%rN!
data[j] = temp; k6CXuU
} `X<B+:>v-
} JP8}+