[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; +\fr3@Yc
} =!*e; L
int i1=l; j#f+0
int i2=mid+1; N/p9Ws
for(int cur=l;cur<=r;cur++){ TUw^KSa
if(i1==mid+1) osoreo;V^
data[cur]=temp[i2++]; d(3F:dbk
else if(i2>r) X*KQWs.
data[cur]=temp[i1++]; X|TEeE c[L
else if(temp[i1] data[cur]=temp[i1++]; 9TIyY`2!
else ,^pM]+NF|
data[cur]=temp[i2++]; %[u6<
} Kyt.[" p
} !hrXud=#"
XI} C|]#
} GbFLu`Iu
: ^F+mQN
改进后的归并排序: 5x(`z
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package org.rut.util.algorithm.support; J;W(}"cFq
x%pC.0%
import org.rut.util.algorithm.SortUtil; g{.>nE^Sc5
:!Wijdq
/** I?YTX
* @author treeroot Dd-;;Y1C
* @since 2006-2-2 +FfT)8@W
* @version 1.0 \_Nr7sc\
*/ peCmb)>Sa
public class ImprovedMergeSort implements SortUtil.Sort { <H<5E'm
kT&-:: ^R
private static final int THRESHOLD = 10; ,24NMv7
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/* L$=@j_V2
* (non-Javadoc) ]( V+ qj
* [R+zzl&Zw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x|d Xa0=N_
*/ !C *%,Ak
public void sort(int[] data) { es]\xw
int[] temp=new int[data.length]; +0rMv
mergeSort(data,temp,0,data.length-1); T]Gxf"mK
} C)~YWx@v
F1JSf&8
private void mergeSort(int[] data, int[] temp, int l, int r) { 1sl^+)z8
int i, j, k; J]UlCg
int mid = (l + r) / 2; %_0,z`f
if (l == r) k_/hgO
return; IT! a)d
if ((mid - l) >= THRESHOLD) &I Iw>,,
mergeSort(data, temp, l, mid); 1mhX3
else (Z"QHfO'
insertSort(data, l, mid - l + 1); [HI&>dm=$
if ((r - mid) > THRESHOLD) .=~beTS'Vo
mergeSort(data, temp, mid + 1, r); _IuEa\>
else }YW0?-G.$
insertSort(data, mid + 1, r - mid); ,Dfq%~:grT
E1IRb':
for (i = l; i <= mid; i++) { A ${b]
temp = data; kq6S`~J^R
} u*B.<GmN
for (j = 1; j <= r - mid; j++) { F,Y@
temp[r - j + 1] = data[j + mid]; b#bdz1@s
} wUWSW<
int a = temp[l]; DeE-M"
int b = temp[r]; #t:]a<3Y2
for (i = l, j = r, k = l; k <= r; k++) { W7>4-gk
if (a < b) { Zx,R6@l
data[k] = temp[i++]; R#i|n<x
a = temp; e:hkWcV
} else { DnvJx!#R
data[k] = temp[j--]; ^wPKqu)^
b = temp[j]; 3t22KY[`
} |Ak>kQJ(1z
} g <^Y^~+E
} yn<H^c
Nr=ud QA{
/** ?jbE3fW
* @param data Ni*f1[sI<
* @param l p.^mOkpt
* @param i CXks~b3SD
*/ vn|u&}h
private void insertSort(int[] data, int start, int len) { @GqPU,RO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4b=hFwr[?
} fN~kdm.
} cE>K:3n
} %^[45e
} e`zEsLs@
((^jyQ
堆排序： 4[a?..X
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package org.rut.util.algorithm.support; TU$PAwn=
|7]7~ 6l
import org.rut.util.algorithm.SortUtil; Ou</{l/
'Bb]<L`
/** Epj
* @author treeroot J01w\#62pQ
* @since 2006-2-2 | qtdmm
* @version 1.0 ";}Lf1M9
*/ X).UvPZ/
public class HeapSort implements SortUtil.Sort{ 35z]pn%L
w]GoeIg({
/* (non-Javadoc) Dww]D|M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EW*!_|
*/ H=])o21
public void sort(int[] data) { !R;P"%PHV
MaxHeap h=new MaxHeap(); '#$Y:/
h.init(data); B!GpD@U
for(int i=0;i h.remove(); F{)YdqQ
System.arraycopy(h.queue,1,data,0,data.length); +qq,;npi
} 9 tkj:8_
&?>h#H222
private static class MaxHeap{ K];nM}<
WRU/^g3O@'
void init(int[] data){ O%5cMz?eU
this.queue=new int[data.length+1]; sv\'XarM
for(int i=0;i queue[++size]=data; |0FRKD]
fixUp(size); t^ LXGQ
} c_c]0Tm
} ;tTM3W-h
'c5#M,G~
private int size=0; \eF5* {9
4"1OtBU3
private int[] queue; D}'g4Ag
mj5$ 2J
public int get() { Ol H{!
return queue[1]; c+?L?s`"
} },'hhj]O
6cz%>@
public void remove() { =2uE\6Fl,
SortUtil.swap(queue,1,size--); (q`Jef
fixDown(1); 5r"BavA
} u\=gps/Z
file://fixdown 11}sRu/
private void fixDown(int k) { !Sr^4R+Z
int j; XRXKO>4q
while ((j = k << 1) <= size) { )bRe"jxn7
if (j < size %26amp;%26amp; queue[j] j++; iz]Vb{5n%
if (queue[k]>queue[j]) file://不用交换 @QI]P{
break; k1Zu&4C\
SortUtil.swap(queue,j,k); Oh6_Bci
k = j; Ntr5Q IPd
} sj a;NL
} J7$1+|"
private void fixUp(int k) { N[X%tf\L]F
while (k > 1) { rg+28tlDn
int j = k >> 1; S!.aBAW
if (queue[j]>queue[k]) #n%?}
break; nN>D=a"&F
SortUtil.swap(queue,j,k); >"?HbR9
k = j; $_ub.g|
} '7o'u]
} @_^QBw0
%Y%+K5;AZ
} }u cqzdk#2
iKv`[k
} C>7Mx{!H
fHvQ9*T
SortUtil： f/Km$#xOr
jENarB^As
package org.rut.util.algorithm; cd{3JGgB
8yz A W&q
import org.rut.util.algorithm.support.BubbleSort; GDw4=0u-
import org.rut.util.algorithm.support.HeapSort; )|,-l^lC
import org.rut.util.algorithm.support.ImprovedMergeSort; Ht? u{\p@
import org.rut.util.algorithm.support.ImprovedQuickSort; 5&7)hMppI
import org.rut.util.algorithm.support.InsertSort; Q>7#</i\.
import org.rut.util.algorithm.support.MergeSort; $de_>
import org.rut.util.algorithm.support.QuickSort; (Tp+43v
import org.rut.util.algorithm.support.SelectionSort; RtH[OZu(8
import org.rut.util.algorithm.support.ShellSort; %(;jx
C&D]!ZvF
/** W093rNF~
* @author treeroot d=WC1"
* @since 2006-2-2 qyl~*r*
* @version 1.0 ]_I<-}?;
*/ _/ j44q
public class SortUtil { 5Zs"CDU
public final static int INSERT = 1; 8B;`9?CI
public final static int BUBBLE = 2; 7p3 ;b"'
public final static int SELECTION = 3; =bs4*[zq
public final static int SHELL = 4; F3jrJ+nJ
public final static int QUICK = 5; XOa<R
public final static int IMPROVED_QUICK = 6; &=fBqod
public final static int MERGE = 7; /eDah3%d
public final static int IMPROVED_MERGE = 8; qM3^)U2
public final static int HEAP = 9; X0b :Oiw
-`wGF#}y(=
public static void sort(int[] data) { U@yrqT@;AU
sort(data, IMPROVED_QUICK); Rg)\o(J
} yGgHd=?
private static String[] name={ `}k!SqG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <kn#`w1U'
}; LW_Y
FMY r6/I
private static Sort[] impl=new Sort[]{ oV?tp4&
new InsertSort(), ~cSC-|$^&
new BubbleSort(), !Y=s_)X
new SelectionSort(), o;FjpZ
new ShellSort(), :eS7"EG{3
new QuickSort(), FePJ8
new ImprovedQuickSort(), n-,~Bp [
new MergeSort(), ]@l~z0^|[_
new ImprovedMergeSort(), L6BHh_*E
new HeapSort() Q !5Tw
}; NF0IF#;a
7qon:]b4
public static String toString(int algorithm){ U"-mLv"|
return name[algorithm-1]; &N0W!
} Mp75L5
Wr`=P,
public static void sort(int[] data, int algorithm) { d|on y
impl[algorithm-1].sort(data); :*tv`:;p
} WP32t@
IaE};8a8
public static interface Sort { OW)8Z60
public void sort(int[] data); aO "JT
} 6BW-AZc
rd]HoFE
public static void swap(int[] data, int i, int j) { r!Eo8C
int temp = data; ( NjX?^
data = data[j]; _kH#{4`Hw
data[j] = temp; )[9L|o5D
} {0QD-b o
} {xEX_$nv