[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; +_{cq@c
} {P,hH~!
int i1=l; %gQUog
int i2=mid+1; -\USDi(
for(int cur=l;cur<=r;cur++){ (?g+.]Dt,
if(i1==mid+1) d>NO}MR
data[cur]=temp[i2++]; =''WA:,=h
else if(i2>r) Ir-QD!!<
data[cur]=temp[i1++]; XdmpfUR,13
else if(temp[i1] data[cur]=temp[i1++]; P*B@it
else 2 6DX4
data[cur]=temp[i2++]; Hj(K*z
} c|(J%@B)
} Caz5q|Oo
Lq$ig8V:O7
} yMu G? x+
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改进后的归并排序: i=*H|)
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package org.rut.util.algorithm.support; "]uPke@
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import org.rut.util.algorithm.SortUtil; G'u[0>
mr/?w0(C
/** _VRxI4q
* @author treeroot *N4/M%1P
* @since 2006-2-2 UmvnVmnv
* @version 1.0 J<0d"'
*/ )HC/J-
public class ImprovedMergeSort implements SortUtil.Sort { ll1N`ke
b !y
private static final int THRESHOLD = 10; zc=G4F01
{]cr.y]\
/* C7G,M
* (non-Javadoc) G3`9'-2q@c
* .%)uCLZr$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x/CM)!U)
*/ hJ]Oa7r
public void sort(int[] data) { |/H?\]7
int[] temp=new int[data.length]; =4'V}p
mergeSort(data,temp,0,data.length-1); MUsF
} 9a=>gEF],@
FNuE-_
private void mergeSort(int[] data, int[] temp, int l, int r) { kX+9U"` C
int i, j, k; :*&c'
int mid = (l + r) / 2; `"[qb ?z
if (l == r) ,`RX~ H=C
return; n?$c"}
if ((mid - l) >= THRESHOLD) Ynvf;qs
mergeSort(data, temp, l, mid); ]Ml
else ?}v/)hjp=?
insertSort(data, l, mid - l + 1); 8AFc=Wx
if ((r - mid) > THRESHOLD) Hi=</ Wy;
mergeSort(data, temp, mid + 1, r); j5Da53c#^
else 4_iA<}>|
insertSort(data, mid + 1, r - mid); 'tw ]jMD
wggB^ }~
for (i = l; i <= mid; i++) { 6pSTw\/6
temp = data; 49M1^nMvoo
} h@NC#Iod
for (j = 1; j <= r - mid; j++) { ,mHUo4h1O
temp[r - j + 1] = data[j + mid]; WA,D=)GP
} [520!JhZY
int a = temp[l]; i0$*):b
int b = temp[r]; KpYezdPF)
for (i = l, j = r, k = l; k <= r; k++) { ~v;+-*t
if (a < b) { -e}(\
data[k] = temp[i++]; * 30K}&T
a = temp; p&x!m}!
} else { aQ$sn<-l
data[k] = temp[j--]; I=#`8deH(
b = temp[j]; s5{=lP
} >h\u[I$7
} " (O3B
} RC[Sa wA
Sx QA*}N
/** OqIXFX"
* @param data *l{epum;
* @param l 5v)bs\x6
* @param i -W1p=od
*/ |@'O3KA
private void insertSort(int[] data, int start, int len) { 5 | ,b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x1#>"z7
} X.;VZwT+
} P'OvwA
} Znb7OF^#"
} jw=PeT|
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堆排序： $Y6\m`
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package org.rut.util.algorithm.support; SDil\x
}' AY#g
import org.rut.util.algorithm.SortUtil; `8W HVC$
}q@#M8b
/** =oSd M2
* @author treeroot s2G9}i{
* @since 2006-2-2 0GrM:Lh y
* @version 1.0 &Q~W{.
*/ y0mNDze
public class HeapSort implements SortUtil.Sort{ \(P?=] -
`L`+`B
/* (non-Javadoc) i^%$ydg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :}v-+eIQ
*/ rMxIujx
public void sort(int[] data) { K#wA ;
MaxHeap h=new MaxHeap(); )Q =>7%ZA
h.init(data); &R<aRE:+R
for(int i=0;i h.remove(); g) u%?T
System.arraycopy(h.queue,1,data,0,data.length); %|(c?`2|
} ~\CS%thX
2uE<mjCt-r
private static class MaxHeap{ W[O]Aal{
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void init(int[] data){ pVy=rS-
this.queue=new int[data.length+1]; X"r)zCP+t
for(int i=0;i queue[++size]=data; 8-nf4=ll
fixUp(size); D:/ n2_
} '/.Dxib
} ,\\ba_*z
Dd5 9xNKm
private int size=0; %Gh5!e:$SI
)FQ"l{P
private int[] queue; S"Cz. bv
p5fr}#en
public int get() { eTS}-
return queue[1]; M@A3+v%K
} `3rwqcxA
uPz+*4+
public void remove() { ! dzgi:
SortUtil.swap(queue,1,size--); (E0
fixDown(1); SraZxuPg>
} {]R'U/
file://fixdown `uMEK>b
private void fixDown(int k) { ]5Uuz?:e
int j; x"12$79=
while ((j = k << 1) <= size) { /88s~=
if (j < size %26amp;%26amp; queue[j] j++; -XV,r<''
if (queue[k]>queue[j]) file://不用交换 FbE/x$;~O
break; 2^WJ1: A
SortUtil.swap(queue,j,k); l'+3 6
k = j; LlQsc{Ddf
} QO'Hyf t
} Ht Fr(g\"$
private void fixUp(int k) { 6$k#B ~~
while (k > 1) { dE7x SI
int j = k >> 1; q9/v\~m
if (queue[j]>queue[k]) 6Xvpk1
break; X8|H5Y:
SortUtil.swap(queue,j,k); h:%,>I%{
k = j; y7,fFUKl
} p&<Ssc
} U6]#RxH
p27Dcwov
} )O1]|r7v
i1 E|lp)
} #aP#r4$
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SortUtil： _gT65G~z
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package org.rut.util.algorithm; /Y7^!3uM
q#K{~:
import org.rut.util.algorithm.support.BubbleSort; -N45ni87
import org.rut.util.algorithm.support.HeapSort; ]at$ohS
import org.rut.util.algorithm.support.ImprovedMergeSort; (g##wa)L
import org.rut.util.algorithm.support.ImprovedQuickSort; KUI{Z I
import org.rut.util.algorithm.support.InsertSort; B5lwQp]
import org.rut.util.algorithm.support.MergeSort; E=sh^Q(A
import org.rut.util.algorithm.support.QuickSort; TjW!-s?S
import org.rut.util.algorithm.support.SelectionSort; sU_K^=6*
import org.rut.util.algorithm.support.ShellSort; f@OH~4FG
o7) y~ ke
/** 8 1,N92T5
* @author treeroot ZoG@"vr2
* @since 2006-2-2 9c>i>Vja!
* @version 1.0 zwfft
*/ HXLnjXoe
public class SortUtil { 6>vR5pn
public final static int INSERT = 1; FOTe,F.8
public final static int BUBBLE = 2; 6j%%CWU{~
public final static int SELECTION = 3; U4!bW
public final static int SHELL = 4; #"gt&t9Q
public final static int QUICK = 5; 8Y`Lq$u
public final static int IMPROVED_QUICK = 6; F\:~^`
public final static int MERGE = 7; |a(KVo
public final static int IMPROVED_MERGE = 8; LE\*33k_
public final static int HEAP = 9; _Id'56N]J!
dN{At-
public static void sort(int[] data) { y~9wxK
sort(data, IMPROVED_QUICK); O<m46mwM
} @kYY1mv;
private static String[] name={ _jQ:9,; A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iM]O
}; 5nG\J g7
"Lp.*o
private static Sort[] impl=new Sort[]{ W5R/Ub@g
new InsertSort(), m}]{Y'i]R
new BubbleSort(), &;BhL%)}
new SelectionSort(), QiPqN$n
new ShellSort(), _}l(i1o,/
new QuickSort(), |+cz\+
new ImprovedQuickSort(), t~+M>Fjm?d
new MergeSort(), <y6`8J7:
new ImprovedMergeSort(), PQHztS"
new HeapSort() km%r{
}; >F$9&s&
QQJGqM3a2
public static String toString(int algorithm){ s9?mX@>h
return name[algorithm-1]; {53FR
} 46?z*~*G
6#Vl3o(E|
public static void sort(int[] data, int algorithm) { &h5Vhzq(<
impl[algorithm-1].sort(data); 6{2y$'m8
} x ytrd.
A4j,]hOD
public static interface Sort { odP<S.
public void sort(int[] data); o@Ye_aM~?Y
} /J`}o}
mv9D{_,pD
public static void swap(int[] data, int i, int j) { -)A:@+GF
int temp = data; MK#
data = data[j]; 3D|Lb]=
data[j] = temp; N8sT?
} UylIxd
} %['NPs%B