[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; s4LO&STh{
} rxZi8w>}
int i1=l; qv2!grp]*W
int i2=mid+1; ~qVz)<
for(int cur=l;cur<=r;cur++){ 2?7(A
if(i1==mid+1) Tbbz'b;{
data[cur]=temp[i2++]; t;qP']2
else if(i2>r) 0"WDH)7hJ
data[cur]=temp[i1++]; &m^@9E)S/
else if(temp[i1] data[cur]=temp[i1++]; fC-P.:F#I
else X JGB)3QI
data[cur]=temp[i2++]; XFwLz
} ub:ly0;t
} f'En#-?O
aEVsU|
} <O~WB
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改进后的归并排序: ^c}J,tZ]
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package org.rut.util.algorithm.support; U^lW@u?:
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import org.rut.util.algorithm.SortUtil; q?j|K|%
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/** qi[Z,&
* @author treeroot .i"W8~<e
* @since 2006-2-2 Qt>>$3]!!
* @version 1.0 =Ufr^naA
*/ Bn?V9TEoO
public class ImprovedMergeSort implements SortUtil.Sort { c "=N
d=O3YNM:v
private static final int THRESHOLD = 10; |9K<-yD
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/* "j<bA8$Vw
* (non-Javadoc) ,yMU@Vg
* L,[;k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TbVn6V'
*/ < Bg8,;
public void sort(int[] data) { R*pC.QiB~
int[] temp=new int[data.length]; QfjN"25_
mergeSort(data,temp,0,data.length-1); H U+ I
} E;Y;r"
`_X;.U.Mv
private void mergeSort(int[] data, int[] temp, int l, int r) { !p"aAZT7sq
int i, j, k; m6mwyom.
int mid = (l + r) / 2; ~g;
if (l == r) d' >>E
return; px''.8
if ((mid - l) >= THRESHOLD) X"MU3]
mergeSort(data, temp, l, mid); ->{d`-}m'
else Qeq5gN]
insertSort(data, l, mid - l + 1); x*XH]&V
if ((r - mid) > THRESHOLD) wE\3$ s/{D
mergeSort(data, temp, mid + 1, r); sq/]wzT:
else 0ZpFE&
insertSort(data, mid + 1, r - mid); CO+/.^s7}S
dP2irC%f8
for (i = l; i <= mid; i++) { LtgXShp_!
temp = data; VR{+f7:}
} oFsM6+\/S
for (j = 1; j <= r - mid; j++) { tiPa6tQ
temp[r - j + 1] = data[j + mid]; O\KQl0*l\\
} vdDludEv
int a = temp[l]; sJx+8 -
int b = temp[r]; &[mZD,
for (i = l, j = r, k = l; k <= r; k++) { ./6<r OW
if (a < b) { 0C%W&;r0
data[k] = temp[i++]; AV8T
a = temp; |Hr:S":9
} else { po9 9 y-
data[k] = temp[j--]; Z)9g~g94
b = temp[j]; YGvUwj'2a
} R<ND=[}s
} Bf`9V713
} =WZqQq{
5~sx:0;
/** 07g':QU@
* @param data sZgRt
* @param l "Ml&[Oge
* @param i ykg#{9+
*/ Sw&!y$ed
private void insertSort(int[] data, int start, int len) { #V02hs1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d%@~mcH>
} 1nknSw#
} {:nQl}
} HmmS(fU
} g9fq5E<G
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堆排序： @wmi5oExc
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package org.rut.util.algorithm.support; 7}O.wUKw%
BKa- k!
import org.rut.util.algorithm.SortUtil; &)F*@C-
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/** b^c9po
* @author treeroot f$HH:^#
* @since 2006-2-2 YZ$ZcfXDW
* @version 1.0 P>Euq'ajX
*/ 7IlOG~DC
public class HeapSort implements SortUtil.Sort{ Z=5qX2fy1*
w2O!M!1
/* (non-Javadoc) 98jN)Nl,oD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :p&!RI(l
*/ W=B"Q qL
public void sort(int[] data) { AwUi+|7r])
MaxHeap h=new MaxHeap(); RZpcXv
h.init(data); <N,)G |&
for(int i=0;i h.remove(); DHC+C4
System.arraycopy(h.queue,1,data,0,data.length); f;SC{2f
} H1"q
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private static class MaxHeap{ _M[,!{C
{%v-(
void init(int[] data){ q@5K6yE
this.queue=new int[data.length+1]; :q<Z'EnW
for(int i=0;i queue[++size]=data; sd#|3
fixUp(size); 3ss6_xd+
} ^\:8w0Y^
} Dq@2-Cv
Z BUArIC
private int size=0; {yU+)t(.
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private int[] queue; $2DuB
dBV7Te4L
public int get() { F(#rQ_z]
return queue[1]; ZPN roCK`
} i|)Su4Dw
y;?ie]3G
public void remove() { JPM))4YDR
SortUtil.swap(queue,1,size--); L(>=BK*
fixDown(1); g @I6$Z
} dUznxZB
file://fixdown V}o n|A
private void fixDown(int k) { 39F Of
int j; ^taBG3P
while ((j = k << 1) <= size) { |IoB?^_h
if (j < size %26amp;%26amp; queue[j] j++; juF{}J2
if (queue[k]>queue[j]) file://不用交换 |]Z:&[D]i
break; e pCLM_yA
SortUtil.swap(queue,j,k); x.0p%O=`
k = j; R1:k23{
} (}r|yE
} mV73 \P6K
private void fixUp(int k) { I]"96'|N
while (k > 1) { Zc |/{$>:W
int j = k >> 1; CBQhIvq.d
if (queue[j]>queue[k]) SQ,?N XZ
break; <!$:8ls
SortUtil.swap(queue,j,k); S_T^G` [
k = j; Sw`RBN[ yo
} F;lI+^}}
} depYqYK7G
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} l&VjUPz_
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} zOEY6lAwI
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SortUtil： v1k)hFjPK
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package org.rut.util.algorithm; R8L_J6Kpa
rdnno
import org.rut.util.algorithm.support.BubbleSort; ;?}l
import org.rut.util.algorithm.support.HeapSort; XS0xLt=
import org.rut.util.algorithm.support.ImprovedMergeSort; Ed0IWPx
import org.rut.util.algorithm.support.ImprovedQuickSort; 9jp:k><\(c
import org.rut.util.algorithm.support.InsertSort; ?T_3n:
import org.rut.util.algorithm.support.MergeSort; *?+V65~dW
import org.rut.util.algorithm.support.QuickSort; Giq=*D+
import org.rut.util.algorithm.support.SelectionSort; 5WqXo{S
import org.rut.util.algorithm.support.ShellSort; O?8Ni=]
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/** YI-O{U
* @author treeroot b6t}{_7
* @since 2006-2-2 DcMJ^=r8O:
* @version 1.0 vB37M@wm
*/ dt[k\ !-v
public class SortUtil { `6y{.$ z
public final static int INSERT = 1; P X;Ed*y
public final static int BUBBLE = 2; /:<IIqO.
public final static int SELECTION = 3; _UE)*l m+
public final static int SHELL = 4; HIGq%m=-x
public final static int QUICK = 5; !/ y!QXj
public final static int IMPROVED_QUICK = 6; 3ZTE<zRQ
public final static int MERGE = 7; q'oMAMf}
public final static int IMPROVED_MERGE = 8; M L7\BT
public final static int HEAP = 9; Ov-b:lH
Gc.P,K/hr
public static void sort(int[] data) { 2nb:)
sort(data, IMPROVED_QUICK); 2RF^s.W
} $rXh0g
private static String[] name={ B,z<%DAE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" obK*rdg,
}; 9p 4"r^
} B396X
private static Sort[] impl=new Sort[]{ '^%~JyU
new InsertSort(), )CI1;
new BubbleSort(), ~9F,%
new SelectionSort(), 4E8JT#&
new ShellSort(), Xd:7"/:r
new QuickSort(), VN4yn| f/
new ImprovedQuickSort(), !@u>A_
new MergeSort(), 30PZ{c&Rll
new ImprovedMergeSort(), 1tCQpf
new HeapSort() RUCPV[{b
}; (F7_S*
iFSJL,QZ3
public static String toString(int algorithm){ D2YZ9e
return name[algorithm-1]; Sz{O2lY
} %puLr'Y
#tt?!\8C
public static void sort(int[] data, int algorithm) { \JG8KE=j
impl[algorithm-1].sort(data); <";,GaZQ
} t3Z_Dp~\
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public static interface Sort { UV}73Sp
public void sort(int[] data); S1n3(U:m
} j4FeSGa
Lf:uNl*D
public static void swap(int[] data, int i, int j) { |vte=)%
int temp = data; :ztr)
data = data[j]; h@7FY
data[j] = temp; I O%6 O
} dAP|:&y@
} #8{F9w<Rf