[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; WY@x2bBi
} 5io7!%
int i1=l; /Vpd*obMB
int i2=mid+1; uO$ujbWZ
for(int cur=l;cur<=r;cur++){ V/5hEoDt
if(i1==mid+1) qA- ya6
data[cur]=temp[i2++]; `1%SXP1
else if(i2>r) %iPu51+=
data[cur]=temp[i1++]; &`7~vA&c
else if(temp[i1] data[cur]=temp[i1++]; d}f| HOFq
else ujcS>XN,1
data[cur]=temp[i2++]; .js4)$W^
} lY}mrb
} t\2myR3
$,k SR}
} RJs_ S
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改进后的归并排序: T0_9:I`&
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package org.rut.util.algorithm.support; |-7<?aw"
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import org.rut.util.algorithm.SortUtil; ~H0~5v F
$8&HpX#h$
/** vg5zsR0u
* @author treeroot }\u~He%
* @since 2006-2-2 +N[dYm
* @version 1.0 i7~oZ)w
*/ 4~a0
public class ImprovedMergeSort implements SortUtil.Sort { i:#R U^R
|PN-,f{-
private static final int THRESHOLD = 10; =nnS X-x
4\(;}M-R{
/* kyJv,!};
* (non-Javadoc) T GMHo{]
* s)=L6t^a6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9[N'HpQ3
*/ >/n5=RWh
public void sort(int[] data) { Vm8;{Sq
int[] temp=new int[data.length]; cXJgdBwo
mergeSort(data,temp,0,data.length-1); 17D167\X
} ]CC= \<
w& RpQcV
private void mergeSort(int[] data, int[] temp, int l, int r) { B4R,[WE"
int i, j, k; 3:Co K#
int mid = (l + r) / 2; Op3 IL/
if (l == r) nE-=7S L
return; q){]fp.,@
if ((mid - l) >= THRESHOLD) N5/TV%u
mergeSort(data, temp, l, mid); >K\ 79<x|
else >mF`XbS
insertSort(data, l, mid - l + 1); =|3L'cDC
if ((r - mid) > THRESHOLD) #<'/sqL
mergeSort(data, temp, mid + 1, r); >^J!Z~;L)
else [9?=&O#*
insertSort(data, mid + 1, r - mid); *7*g! km
A#1y>k
for (i = l; i <= mid; i++) { f`Wfw3
temp = data; #UND'c(5
} zm8m J2s
for (j = 1; j <= r - mid; j++) { cJ8*[H<NV
temp[r - j + 1] = data[j + mid]; D'nV &m
} N_0&3PUSM
int a = temp[l]; ==FzkRA)
int b = temp[r]; O1#rCFC|y
for (i = l, j = r, k = l; k <= r; k++) { D"x~bs?V\
if (a < b) { [z$J
data[k] = temp[i++]; *fd` .}
a = temp; c7rYG]
} else { G~esSL^G/
data[k] = temp[j--]; 3F.O0Vz
b = temp[j]; 0)2lBfHQ&
} Ne9 .wd
} :m$%D]WY
} rz7yAm
,}2j Fb9z4
/** *<0g/AL
* @param data NX=dx&i>+
* @param l gSe{S
* @param i Mvcl9
*/ (u'/tNGS
private void insertSort(int[] data, int start, int len) { dJ&s/Z/>E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fglZjT
} 57MoO
} W@S9}+wl*
} E Fv+[
} [cW
fzio8mKVX
堆排序： /6.b>|zF
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package org.rut.util.algorithm.support; mn4;$1~e>H
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import org.rut.util.algorithm.SortUtil; U&/S
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/** HZ}'W<N
* @author treeroot S8cFD):q
* @since 2006-2-2 uJ y@
* @version 1.0 ge?ymaU$a
*/ }wb;ulN)
public class HeapSort implements SortUtil.Sort{ enrmjA&3
zF$wz1 %
/* (non-Javadoc) :)yM9^<D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a[!d)Y:zx
*/ {2Ibd i
public void sort(int[] data) { E,$uNw']
MaxHeap h=new MaxHeap(); ,5?MRqCM
h.init(data); m{yON&y
for(int i=0;i h.remove(); hzH5K
System.arraycopy(h.queue,1,data,0,data.length); >dGYZfqD
} n 3]y$wK
=>J#_Pprn
private static class MaxHeap{ <KA@A}
?C{N0?[P-
void init(int[] data){ ?n+\T'f!
this.queue=new int[data.length+1]; Y|~>(
for(int i=0;i queue[++size]=data; :F\f}G3
fixUp(size); b#U%aPH
} J)-> 7h=
} f5-={lUlIS
I$LO0avvH2
private int size=0; u5_fM*Ka
]>o2P cb;
private int[] queue; 5=986ci$U
?rDwYG(u]@
public int get() { &O,$l3 P
return queue[1]; g1|c?#fwo
} :JIPF=]fc
CQ[-Cp7
public void remove() { y<b0z\
SortUtil.swap(queue,1,size--); #w@Pa L iS
fixDown(1); ||HIp9(3
} NZ5~\k
file://fixdown mK-:laIL"
private void fixDown(int k) { SI9hS4<j
int j; cFvx*n
while ((j = k << 1) <= size) { h)vTu%J:
if (j < size %26amp;%26amp; queue[j] j++; O2dgdtm
if (queue[k]>queue[j]) file://不用交换 lz 6 Aj
break; Qg!*=<b
SortUtil.swap(queue,j,k); B vc=gW
k = j; Qknc.Z}
} a)Ek~{9
} KOx#LGz
private void fixUp(int k) { BaAb4{
while (k > 1) { Hrnql
int j = k >> 1; \[EWxu
if (queue[j]>queue[k]) |lwN!KVQ,
break; =[+&({
SortUtil.swap(queue,j,k); nj`qV
k = j; 4/WCs$
} /nFw
} -Wk"o?}q
vKC&Qi ;
} e&4u^'+K
TWEqv<c
} p9WskYpm
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SortUtil： &X,)+b=
(Nb1R"J`
package org.rut.util.algorithm; 4>C=:w
,z)NKt#
import org.rut.util.algorithm.support.BubbleSort; {VG[m@
import org.rut.util.algorithm.support.HeapSort; 3uG5b8?
import org.rut.util.algorithm.support.ImprovedMergeSort; {Y%=/ba W
import org.rut.util.algorithm.support.ImprovedQuickSort; Aq'E:/
import org.rut.util.algorithm.support.InsertSort; NV4W2thYo
import org.rut.util.algorithm.support.MergeSort; 89=JC[c
import org.rut.util.algorithm.support.QuickSort; }zxh:"#K
import org.rut.util.algorithm.support.SelectionSort; Jjh!/pWZ4
import org.rut.util.algorithm.support.ShellSort; t~K!["g
R6mJFE*6T9
/** ^>{;9lo<
* @author treeroot < DZ76
* @since 2006-2-2 _hL4@C
* @version 1.0 -L?% o_
*/ pY>-N
public class SortUtil { *"{Z?< 3
public final static int INSERT = 1; @b\_696.
public final static int BUBBLE = 2; .hNw1~Fj
public final static int SELECTION = 3; S{7ik,Gdg
public final static int SHELL = 4; Rbc2g"]
public final static int QUICK = 5; ={@ @`yP^$
public final static int IMPROVED_QUICK = 6; u!Nfoq&'u
public final static int MERGE = 7; i=H>D
public final static int IMPROVED_MERGE = 8; LEnP"o9ZW
public final static int HEAP = 9; ||ZufFO
E(kb!Rz
public static void sort(int[] data) { ,bp pM
sort(data, IMPROVED_QUICK); ^_h7!=W
} C{i;spc!bi
private static String[] name={ Is6 _
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,W8Iabi^
}; xp8f
~'QeN%qadP
private static Sort[] impl=new Sort[]{ l%U_iqL&
new InsertSort(), iA{jKk=
new BubbleSort(), lF"(|n"R
new SelectionSort(), f3>6:(
new ShellSort(), ,3--ERf
new QuickSort(), |-Esc|J(
new ImprovedQuickSort(), S<]a@9W
new MergeSort(), [xp,&
new ImprovedMergeSort(), pH l2!{z
new HeapSort() u#@{%kPW
}; =>ztBw\
Y0fO.k#C^
public static String toString(int algorithm){ Ar7mH4M
return name[algorithm-1]; $EGRaps{j>
} ~& WN)r'4y
m5em<P!G
public static void sort(int[] data, int algorithm) { hB}h-i(u
impl[algorithm-1].sort(data); P9TBQW2G{
} Ao,!z
5H:~6z
public static interface Sort { $K_YC~
public void sort(int[] data); %::deV7
} YyJ{
o|;eMO-
public static void swap(int[] data, int i, int j) { Am4^v?q
int temp = data; ;y~{+{{Ow
data = data[j]; =e!l=d|/
data[j] = temp; 1^f.5@tV
} ?X#/1X%u:
} =GKS;d#/