[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; 9 ;uw3vI%
} qRcg|']R
int i1=l; *&]8rm{
int i2=mid+1; IDqUiN
for(int cur=l;cur<=r;cur++){ vR5X
if(i1==mid+1) 1|>vk+;1h
data[cur]=temp[i2++]; NM),2%<
else if(i2>r) hSAI G
data[cur]=temp[i1++]; :@E^oNKa0
else if(temp[i1] data[cur]=temp[i1++]; hR2 R
else cw)J+Lyh
data[cur]=temp[i2++]; aL;zN%Tw
} 2sG1Hox
} ,aP5)ZN-
U Rq9:{
} fU%Ys9:wU
};"_Ku4#-
改进后的归并排序: .8ikcs
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package org.rut.util.algorithm.support; %RF$Y=c'C
wouk~>Jft
import org.rut.util.algorithm.SortUtil; n!X%i+|4x
sRcS-Yw[S
/** B>d49(jy
* @author treeroot yHs9J1Sf
* @since 2006-2-2 ]{{%d4
* @version 1.0 .}+3A~
*/ MZA%ET,l,<
public class ImprovedMergeSort implements SortUtil.Sort { BonjK#
=F/R*5:T
private static final int THRESHOLD = 10; H>]*<2(=-
xN>\t& c
/* ?;5/"/i
* (non-Javadoc) Nknd8>Hy+
* ;O,&MR{;|n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =)i^E9
*/ |FlB#
public void sort(int[] data) { RhF<{U.
int[] temp=new int[data.length]; mKV31wvK}
mergeSort(data,temp,0,data.length-1); YbWz!.WPe
} F &5iA\
l9+CJAmq
private void mergeSort(int[] data, int[] temp, int l, int r) { >}]bKq
int i, j, k; .v+J@Y a
int mid = (l + r) / 2; aWLA6A+C&
if (l == r) (8o;Cm
return; .9g :-hv
if ((mid - l) >= THRESHOLD) tx+P@9M_Aq
mergeSort(data, temp, l, mid); S}0-2T[
else &A/b9GW^-
insertSort(data, l, mid - l + 1); 7OXRR)]V
if ((r - mid) > THRESHOLD) =*+f2
mergeSort(data, temp, mid + 1, r); Iw#[K
else <bhJ>
insertSort(data, mid + 1, r - mid); >nK(
&n83>Q
for (i = l; i <= mid; i++) { RCK*?\m5
temp = data; Y}yh6r;i
} 3w[uc~f
for (j = 1; j <= r - mid; j++) { |@R/JGB^
temp[r - j + 1] = data[j + mid]; &lzCRRnvt
} tN.BI1nB
int a = temp[l]; ,5t_}d|3C=
int b = temp[r]; @ZV>Cl@%2
for (i = l, j = r, k = l; k <= r; k++) { -\ew,y
if (a < b) { Qch'C0u
data[k] = temp[i++]; m)6-D-&7
a = temp; 0CX9tr2J
} else { r"x}=# b!
data[k] = temp[j--]; `\3RFr
b = temp[j]; PT&qys2k
} 0s}gg[lj
} !>K=@9NC|.
} Dp} $q`F[
~\u>jel
/** Z~|%asjFE
* @param data ~WB-WI\
* @param l #q&Nd2y
* @param i k#mL4$]V5N
*/ 56NDU>j$
private void insertSort(int[] data, int start, int len) { 7s:cg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2AxKB+c1`
} a~-k} G5
} %^"i\-*|S
} 4m~p(r
} kqC7^x
S|yDGT1
堆排序： dOgc%(kz
mwz!7Q
package org.rut.util.algorithm.support; H6$pA^
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import org.rut.util.algorithm.SortUtil; w5Ucj*A\
d1*0?GTT
/** 4}YHg&@\d%
* @author treeroot < r b5'
* @since 2006-2-2 LR"7e
* @version 1.0 "oR%0pU*
*/ }1sd<<\`
public class HeapSort implements SortUtil.Sort{ $O\]cQD`u
N#:W#C{16w
/* (non-Javadoc) Wp^|=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) poi39B/Vt
*/ Ipow Jw^
public void sort(int[] data) { hrfSe$8
MaxHeap h=new MaxHeap(); &&96kg3
h.init(data); a'my0m
for(int i=0;i h.remove(); Q b5vyV `
System.arraycopy(h.queue,1,data,0,data.length); $KGRpI
} #_Lgo
"(\]-%:7
private static class MaxHeap{ x.(Sv]+[
zj1_#=]
void init(int[] data){ ( M3-S5
this.queue=new int[data.length+1]; 5* ~EdT
for(int i=0;i queue[++size]=data; 0{Zwg0&
fixUp(size); = o1&.v2j
} VK}H;
} :+fW#:
uH)v\Js
private int size=0; Nb>C5TjR
hN;$'%^
private int[] queue; a)/ }T
>-CNHb
public int get() { +/#Lm#*nu%
return queue[1]; $1D>}5Ex
} ;|Rrtf9
?SoRi</1
public void remove() { hBW,J$B
SortUtil.swap(queue,1,size--); p;2NO&
fixDown(1); emS7q|^
} %#lJn.o
file://fixdown P"+K'B7K3
private void fixDown(int k) { S%Z2J)H"
int j; z}P1+Pm
while ((j = k << 1) <= size) { `u;4Z2Lr0
if (j < size %26amp;%26amp; queue[j] j++; dJmr!bN\;
if (queue[k]>queue[j]) file://不用交换 gBXbB9
break; Gii1|pLZ1
SortUtil.swap(queue,j,k); x.U:v20`
k = j; E.Arq6
} ?)/&tk9.n
} \ 3l3,VYH
private void fixUp(int k) { <\\,L@
while (k > 1) { .W0;Vhw"
int j = k >> 1; *U|2u+| F
if (queue[j]>queue[k]) <%LN3T
break; I h 19&D
SortUtil.swap(queue,j,k); t^<ki?*
k = j; Q\Nz^~dQ:Y
} >xm:?WR
} Eg]tDPN1
#)<WQZ)
} Z%Yq{tAt
zCpXF<_C
} 53?B.\
Z<[f81hE&
SortUtil： $4rMYEn08
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package org.rut.util.algorithm; Z E},xU%
Q-$EBNz
import org.rut.util.algorithm.support.BubbleSort; f`,isy[
import org.rut.util.algorithm.support.HeapSort; FZJ sZeO
import org.rut.util.algorithm.support.ImprovedMergeSort; "]1|%j
import org.rut.util.algorithm.support.ImprovedQuickSort; 2c8e:Xgv
import org.rut.util.algorithm.support.InsertSort; .h>tef
import org.rut.util.algorithm.support.MergeSort; 7?~*F7F
import org.rut.util.algorithm.support.QuickSort; 4-\gha
import org.rut.util.algorithm.support.SelectionSort; vsCy?
import org.rut.util.algorithm.support.ShellSort; &UoQ8&
L]Dl}z
/** 7T9Mo .
* @author treeroot *4{GID
* @since 2006-2-2 $pYT#_P!/
* @version 1.0 )?,X\/5
*/ Hd0?}w\
public class SortUtil { A>Oi9%OY:
public final static int INSERT = 1; )R9QJSe
public final static int BUBBLE = 2; rtgu{m02
public final static int SELECTION = 3; /-&a]PJ
public final static int SHELL = 4; uSn<]OrZo`
public final static int QUICK = 5; dfA4OZ&
public final static int IMPROVED_QUICK = 6; K6; sxF
public final static int MERGE = 7; ; Uf]-uS
public final static int IMPROVED_MERGE = 8; G' a{;3
public final static int HEAP = 9; <+${gu?^
@m(ja@YC
public static void sort(int[] data) { ;kiL`K
sort(data, IMPROVED_QUICK); 5oR/Q|^
} hS7o=G[
private static String[] name={ -PH!U Hg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i slg5
}; {qjw S1v
94xRKQ}
private static Sort[] impl=new Sort[]{ b'5L|1d
new InsertSort(), "yc_*R(pU
new BubbleSort(), ^bDh[O
new SelectionSort(), m%G:|`f7
new ShellSort(), *we*IhIP
new QuickSort(), YU24wTe;k
new ImprovedQuickSort(), -H(\[{3{V
new MergeSort(), K#<cuHGC
new ImprovedMergeSort(), Ju 0
new HeapSort() lQnqPQY
}; B&k"B?9mL
/qX=rlQ/n
public static String toString(int algorithm){ eZ[O:Wvk:
return name[algorithm-1]; ~xaPq=AH
} o+T%n1$+V
8<Yqpb
public static void sort(int[] data, int algorithm) { 6P6Pl&
impl[algorithm-1].sort(data); *#2]`G)
} ;/]vmgl2
WT9k85hqj
public static interface Sort { )=c/{
public void sort(int[] data); VOK0)O>&
} h TY7`m">
aR}L- -m
public static void swap(int[] data, int i, int j) { A ^wIsAxT
int temp = data; c$[cDf~
data = data[j]; &e~g}7
data[j] = temp; Y$ To)qo
} j)neVPf%v
} w-M,@[G