[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; oY4^CGk=
} yeI>b 1>Q
int i1=l; >UQY3C
int i2=mid+1; 5a-x$Qb9
for(int cur=l;cur<=r;cur++){ 9=mc3m:Tb(
if(i1==mid+1) 1<tJ3>Xl
data[cur]=temp[i2++]; i!x>)E
else if(i2>r) en'"" w
data[cur]=temp[i1++]; wRvh/{xB
else if(temp[i1] data[cur]=temp[i1++]; =EYWiK77a
else z2>LjM) #
data[cur]=temp[i2++]; [l3ys
} $nb.[si\
} 6w=`0r3hy
-&COI-P8
} XEnu0gr
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改进后的归并排序: }v's>Ae~p
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package org.rut.util.algorithm.support; 1uO2I&B
#R>x]Nt}
import org.rut.util.algorithm.SortUtil; DXo]O}VF
S,j. ?u*!
/** f S[-K?K
* @author treeroot &s(J:P$!
* @since 2006-2-2 =W &Mt
* @version 1.0 V2!0),]B
*/ !~&&&85
public class ImprovedMergeSort implements SortUtil.Sort { /Kd7#@
l n\qvD_
private static final int THRESHOLD = 10; b[GhI+_
m<49<O6o
/* RC/45:hZZ
* (non-Javadoc) (6.uNLr
* ^?$,sS ;Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9vz\R-un
*/ cGiL9|k
public void sort(int[] data) { *f3StX
int[] temp=new int[data.length]; +J|H~`
mergeSort(data,temp,0,data.length-1); pB4Uc<e
} @)BO`;*$fF
c:.~%AJx
private void mergeSort(int[] data, int[] temp, int l, int r) { ^nK<t?KS
int i, j, k; x9,jXd
int mid = (l + r) / 2; .[}G{%M~[
if (l == r) z)S6f79`Q
return; {vGJ}q?Sd"
if ((mid - l) >= THRESHOLD) \XPGA uEo
mergeSort(data, temp, l, mid); a%e`
else j)2I+[aoB
insertSort(data, l, mid - l + 1); T8|5%Y
if ((r - mid) > THRESHOLD) Kp6 @?
mergeSort(data, temp, mid + 1, r); s/=%kCo
else 4 sax
insertSort(data, mid + 1, r - mid); 'S1u@p,q
G[\TbPh
for (i = l; i <= mid; i++) { Z;%uDlcXI
temp = data; *X(:vET
} X%+lgm+
for (j = 1; j <= r - mid; j++) { R!%nzL@e&`
temp[r - j + 1] = data[j + mid]; 0_eqO'"
} ~L"$(^/
int a = temp[l]; $'%GB $.
int b = temp[r]; ] \M+ju
for (i = l, j = r, k = l; k <= r; k++) { @uH!n~QV
if (a < b) { y-db CYMc
data[k] = temp[i++]; {$,\Qg
a = temp; t|$jgM
} else { $8)XN-%(
data[k] = temp[j--]; P&uSh?[ ^
b = temp[j]; )-26(aNGT
} 7IkPi?&{
} 2}A)5P*K
} HMCLJ/
W|7|XO
/** \c -m\|
* @param data HiA E9
* @param l `^Vd*
* @param i w.-x2Zg},
*/ _"ciHYHBQ
private void insertSort(int[] data, int start, int len) { )"S%'myj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I@MG?ZQ
} uhh7Ft#H
} Y>8Qj+d
} N#K)Z5J)b
} 8i154#l+\
dMH_:jb
堆排序： GLn=*Dh#
r*+~(83k
package org.rut.util.algorithm.support; .`}TND~
@"@|O>KJ
import org.rut.util.algorithm.SortUtil; +Yc^w5 !(
lN#j%0MaUo
/** 1EXT^2!D
* @author treeroot >jX"
* @since 2006-2-2 &t^*0/~
* @version 1.0 -67Z!N
*/ WM'!|lg
public class HeapSort implements SortUtil.Sort{ d ItfR'$
orFwy!
/* (non-Javadoc) &KjMw:l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #NW+t|E
*/ Jt=->
public void sort(int[] data) { `qc"JB
MaxHeap h=new MaxHeap(); ,*J@ic7"
h.init(data); s/tLY/U/
for(int i=0;i h.remove(); XgC^-A w
System.arraycopy(h.queue,1,data,0,data.length); f6%k;R.Wz
} y>EW,%leC
|%C2 cx
private static class MaxHeap{ XM`GK>*aC(
?$|tT\SFV
void init(int[] data){ 0f6o0@
this.queue=new int[data.length+1]; `NNP<z+\
for(int i=0;i queue[++size]=data; 8Yh'/,o=L#
fixUp(size); [)Nt;|U
} J<0{3pZY
} 9wYm(7M6
^OKm (
private int size=0; f~NS{gL*
J8emz8J
private int[] queue; N1Vj;-
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public int get() { 0vqVE]C
return queue[1]; I=kqkuW
} O>' }q/
1 pVw,}
public void remove() { &<N8d(
SortUtil.swap(queue,1,size--); KnkmGy
fixDown(1); ^Kz?SO
} :}e<
file://fixdown |M;Nq@bRv
private void fixDown(int k) { gw)4P tb!
int j; ,D;8~llM
while ((j = k << 1) <= size) { \}$|Uo$O
if (j < size %26amp;%26amp; queue[j] j++; #c:s2EL
if (queue[k]>queue[j]) file://不用交换 ^3dc#5]Xf
break; I{89chi
SortUtil.swap(queue,j,k); q`1tUd4G
k = j; TRi'l#m4
} ,Vi_~b
} 6TW<,SM
private void fixUp(int k) { ]`$6=)_X
while (k > 1) { >%tP"x{
int j = k >> 1; :^]Po$fl
if (queue[j]>queue[k]) $5i\D rs
break; ~^2w)-N
SortUtil.swap(queue,j,k); 6CyByj&
k = j; oJTEN}fL
} Ak?9a_f
} M2Nh3ijr
f SkC>mWv
} h"1}j'2>@
Fqeqn[,
} @@D/&}#F
9 Zos;
SortUtil： j\>&]0-Iq
".>#Qp%
package org.rut.util.algorithm; GJB+]b-
u&l;\w
import org.rut.util.algorithm.support.BubbleSort; `,V&@}&"n
import org.rut.util.algorithm.support.HeapSort; 6>WkisxG
import org.rut.util.algorithm.support.ImprovedMergeSort; ! v![K
import org.rut.util.algorithm.support.ImprovedQuickSort; b$'%)\('g
import org.rut.util.algorithm.support.InsertSort; ^UvL1+
import org.rut.util.algorithm.support.MergeSort; 0XA\Ag\`G
import org.rut.util.algorithm.support.QuickSort; !f/K:CK|
import org.rut.util.algorithm.support.SelectionSort; vc: kY
import org.rut.util.algorithm.support.ShellSort; eQ'E`S_d
u.2X"
/** k{f1q>gd
* @author treeroot f!+d*9
* @since 2006-2-2 x<l 5wh
* @version 1.0 WfO EI1
*/ `:iMGqZN
public class SortUtil { (csk
public final static int INSERT = 1; sccLP_#Z
public final static int BUBBLE = 2; .V!5Ui<
public final static int SELECTION = 3; 2?ue.1C
public final static int SHELL = 4; +O8[4zn&k
public final static int QUICK = 5; OAkqPG&w
public final static int IMPROVED_QUICK = 6; GG#-x$jK
public final static int MERGE = 7; vE[d& b[
public final static int IMPROVED_MERGE = 8; vu.ug$T
public final static int HEAP = 9; XO;_F"H=
`lY-/Ty
public static void sort(int[] data) { r.?dT |A
sort(data, IMPROVED_QUICK); a0ms9%Y;Q[
} pss')YP.
private static String[] name={ :7(fBf5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Sqp91[,
}; L[zTT\a
S_sHwObFu|
private static Sort[] impl=new Sort[]{ >(2;(TbQm0
new InsertSort(), q}_8iDO6
new BubbleSort(), OkRb3}
new SelectionSort(), 2po8n_
new ShellSort(), EZWWvL
new QuickSort(), +IXr4M&3
new ImprovedQuickSort(), Ls2,+yo]>
new MergeSort(), Idu'+O4
new ImprovedMergeSort(), eV_",W
new HeapSort() LiEEQ
}; b|87=1^m[
9+(b7L
public static String toString(int algorithm){ %{ U (y#
return name[algorithm-1]; @^0}wk
} !v3d:n\W8
|$tF{\
public static void sort(int[] data, int algorithm) { 6<z#*`U1
impl[algorithm-1].sort(data); jXx~5
} /\fR6|tJ
sB0]lj-[Un
public static interface Sort { x6aVNH=
public void sort(int[] data); Z&@P<
} HE*^!2f
*=md!^x`
public static void swap(int[] data, int i, int j) { xz`0V}dPl
int temp = data; =glG |
data = data[j]; + $M<ck?Bo
data[j] = temp; XFFm'W6@
} +v%+E{F$+
} .5HD i-