[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; :YJ7J4
} [%iUg\'7d
int i1=l; ^Q)gsJY|I
int i2=mid+1; ,4>WLJDo
for(int cur=l;cur<=r;cur++){ k|$"TFXx;
if(i1==mid+1) zsMw5C
data[cur]=temp[i2++]; 28Ssb|
else if(i2>r) hKH$AEHEU}
data[cur]=temp[i1++]; nhQ44qRgQ
else if(temp[i1] data[cur]=temp[i1++]; IGK_1@tq
else W]!@Zlal
data[cur]=temp[i2++]; fs3-rXoB
} H7tQ#
} 8MeO U
orQV'
} R%)2(\
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改进后的归并排序: 4l%?mvA^m
o! 2n}C
package org.rut.util.algorithm.support; KT lP:pB;
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import org.rut.util.algorithm.SortUtil; -lP )
Ukh$`q}
/** \=EY@*=
* @author treeroot ! =\DC,-CB
* @since 2006-2-2 [V2omSZo
* @version 1.0 /Oq)3fU e
*/ :tjgg]
public class ImprovedMergeSort implements SortUtil.Sort { 5D]30
~}7$uW0ol
private static final int THRESHOLD = 10; T1Gp$l
a+YR5*&[OO
/* C-a*EG
* (non-Javadoc) .# !'c
* 55>" R{q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {z5V{M(|w3
*/ JVUZ}#O
public void sort(int[] data) { |<j,Tr1[
int[] temp=new int[data.length]; i14[3bPLk!
mergeSort(data,temp,0,data.length-1); D4=..;
} ,>bGbx
cX|[WT0[I
private void mergeSort(int[] data, int[] temp, int l, int r) { ),nCq^Bp
int i, j, k; Ie G7@
int mid = (l + r) / 2; O8K@&V p
if (l == r) QvG56:M3
return; =_$XP
if ((mid - l) >= THRESHOLD) H Z;ZjC*
mergeSort(data, temp, l, mid); zdxT35h
else ZQ,fm`y\
insertSort(data, l, mid - l + 1); Vl5SL{+D
if ((r - mid) > THRESHOLD) 5y1or
mergeSort(data, temp, mid + 1, r); ~`*1*;Q<H|
else 2-vJv+-
insertSort(data, mid + 1, r - mid); iGG6Myp-
U}tl_5%)
for (i = l; i <= mid; i++) { fOa6,
temp = data; l^DINZU@
} [D*J[?yt
for (j = 1; j <= r - mid; j++) { g\ErJ+i
temp[r - j + 1] = data[j + mid]; v-P8WFjca
} |ZvNH ~!
int a = temp[l]; 0lX)Cl
int b = temp[r]; :y=!{J<
for (i = l, j = r, k = l; k <= r; k++) { zq,iLoY[R
if (a < b) { ;;ER"N
data[k] = temp[i++]; Sg-g^dIN1
a = temp; N=OS\pz
} else { )>(L{y|uYX
data[k] = temp[j--]; gKmX^A5<
b = temp[j]; GE%2/z p
} u~" siH
} UppBnw
} `d75@0:
c5X`_
/** q:vz?G
* @param data 1*Sr5N[=
* @param l . _1jk
* @param i g d z
*/ aRbx
private void insertSort(int[] data, int start, int len) { lkV6qIj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,VPbUo@
} 'Pf_5q
} LYp'vZ!
} Nc{]zWL9
} Uh>.v |P6
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堆排序： sC% b~
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package org.rut.util.algorithm.support; HV ;;
}ppVR$7]0
import org.rut.util.algorithm.SortUtil; CV s8s
*i`v~>
/** UE^D2u
* @author treeroot +AB6lv
* @since 2006-2-2 V/J>GRjw
* @version 1.0 O~.U:45t
*/ d4%dIR)
public class HeapSort implements SortUtil.Sort{ s0r"N7~
([Ebsj
/* (non-Javadoc) ?8Et[tFg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wuKl-:S;Vs
*/ ;P3>>DZ
public void sort(int[] data) { 2-~a P
MaxHeap h=new MaxHeap(); x Y| yI>
h.init(data); x;Gz6|
for(int i=0;i h.remove(); +L0J_.5%^
System.arraycopy(h.queue,1,data,0,data.length); 8)sg_JC
} 2A*/C7
G-arnu)
private static class MaxHeap{ (B&h;U$HAH
$'^&\U~?
void init(int[] data){ YZibi
this.queue=new int[data.length+1]; X6xx2v%D
for(int i=0;i queue[++size]=data; &} ,*\Oj
fixUp(size); ?L=A2C\_-
} ^OF5F8Tf/
} |=\91fP68`
Raefj(^V
private int size=0; 1 o|T
X:_<Y_JT
private int[] queue; N<(HPE};
6)ycmu;!$
public int get() { N0Gf0i>
return queue[1]; Uan,H1a
} M`~!u/D7
sMH#BCC
public void remove() { co/7lsW
SortUtil.swap(queue,1,size--); =N_,l'U\^
fixDown(1); 9RxO7K
} a"QU:<-v
file://fixdown =O,JAR"ug
private void fixDown(int k) { R*yU<9Mm8
int j; Z v4<b
while ((j = k << 1) <= size) { !h>D;k6 e
if (j < size %26amp;%26amp; queue[j] j++; R uLvG+
if (queue[k]>queue[j]) file://不用交换 }kE87x'
break; .jU Z
SortUtil.swap(queue,j,k); "<*awWNI
k = j; -u|l}}bh
} -l "U"U"F
} 0O~p7D
private void fixUp(int k) { M/{g(|{
while (k > 1) { A:eG5K}
int j = k >> 1; _R7 w?!t8
if (queue[j]>queue[k]) t}Ss=0dJO
break; :mpiAs<%U"
SortUtil.swap(queue,j,k); =OYQM<q
k = j; W/r^ugDV
} I]X
} cOkgoL" 4
H?uukmZl
} 4\p-TPM
dv7<AJ
} m"4B!S&Fc(
s*Ih_Ag=:
SortUtil： G;TsMq
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package org.rut.util.algorithm; YsP/p-
w(BH247`
import org.rut.util.algorithm.support.BubbleSort; A62<]R)n
import org.rut.util.algorithm.support.HeapSort; nJJs%@y
import org.rut.util.algorithm.support.ImprovedMergeSort; cXN _*%
import org.rut.util.algorithm.support.ImprovedQuickSort; qX$u4I!,
import org.rut.util.algorithm.support.InsertSort; 5h8o4
import org.rut.util.algorithm.support.MergeSort; <C<`J{X0
import org.rut.util.algorithm.support.QuickSort; iq6a|XGi
import org.rut.util.algorithm.support.SelectionSort; xMI+5b8
import org.rut.util.algorithm.support.ShellSort; 0Q~@F3N-\>
Fk1.iRVzi
/** |;u}sX1t9
* @author treeroot s-k_d<
* @since 2006-2-2 z<pJYpxH
* @version 1.0 \cQ .|S
*/ R#(G%66
public class SortUtil { 4DLq}v
public final static int INSERT = 1; zX kx7d8
public final static int BUBBLE = 2; nxaT.uFd1
public final static int SELECTION = 3; wqD5d
public final static int SHELL = 4; 8~ #M{}
public final static int QUICK = 5; uLN[*D
public final static int IMPROVED_QUICK = 6; _8><| 3d
public final static int MERGE = 7; pm USF #u
public final static int IMPROVED_MERGE = 8; `qiQ$kz
public final static int HEAP = 9; gUVn;_
+l?; )
public static void sort(int[] data) { 9`"DFFSMS
sort(data, IMPROVED_QUICK); f:xWu-
} dvjTyX
private static String[] name={ *8)2iv4[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F9H~k"_ZJR
}; (][LQ6Pc
d~*TIN8Ke~
private static Sort[] impl=new Sort[]{ {8@\Ij
new InsertSort(), N[Sb#w`[/
new BubbleSort(), !e3YnlE
new SelectionSort(), Q_zr\RM>
new ShellSort(), 4tXSYHd3
new QuickSort(), 1;&;5
new ImprovedQuickSort(), =Q(vni83<
new MergeSort(), 0{) $SY
new ImprovedMergeSort(), 4vdNMV~
new HeapSort() 'iUg[{'+
}; feEMg
GXX+}=b7qO
public static String toString(int algorithm){ 6EJVD!#[K
return name[algorithm-1]; Ip?]K*sq
} V 0{tap}
w([$@1]
public static void sort(int[] data, int algorithm) { wJG$c-(\0
impl[algorithm-1].sort(data); ,EEPh>cXc
} >dQK.CG
D59T?B|BdD
public static interface Sort { fgF;&(b
public void sort(int[] data); $'"8QOnJ?k
} )`HA::
A^Cj1:,
public static void swap(int[] data, int i, int j) { nr\q7
int temp = data; -5>NE35Cto
data = data[j]; 5bX6#5uP1
data[j] = temp; cHD%{xlb
} <@,$hso7:
} d^V$Z6* ]