[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; >Hf{Mx{<
} 3FBLCD3
int i1=l; @KQ>DBWQM
int i2=mid+1; *yBVZD|?H
for(int cur=l;cur<=r;cur++){ 7FC!^)x1
if(i1==mid+1) hRf l\Q[
data[cur]=temp[i2++]; 8$IKQNS
else if(i2>r) ?eS;Yc
data[cur]=temp[i1++]; 1K Vit{
else if(temp[i1] data[cur]=temp[i1++]; VZ9 p "
else VYG@_fd!x
data[cur]=temp[i2++]; A \/~u"Y
} P< OH{l
} }UPC~kC+Z
h>pu^ `hk
} Rqe.=+Qs
ajSB3}PN
改进后的归并排序: #W~jQ5NS\
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package org.rut.util.algorithm.support; Ark]>4x>
5r5on#O&
import org.rut.util.algorithm.SortUtil; ~/rD_K
aC1z.?!U
/** sxT&T=7
* @author treeroot }#ink4dK:
* @since 2006-2-2 $Cz2b/O
* @version 1.0 |[`YGA4
*/ h*Fv~j'p
public class ImprovedMergeSort implements SortUtil.Sort { )LGVR3#
z/\OtYz
private static final int THRESHOLD = 10; i:s=
,`f]mv l
/* u+8"W[ZULq
* (non-Javadoc) M'%4BOpI6`
* }u8(7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7r;16"
*/ y8YsS4E^Q
public void sort(int[] data) { ~vXbh(MX
int[] temp=new int[data.length]; \ ca<L
mergeSort(data,temp,0,data.length-1); 5aaM;45C
} vn}m-U XA*
%`i*SF(gV
private void mergeSort(int[] data, int[] temp, int l, int r) { r^5%0_F]
int i, j, k; Y%;J/4dd
int mid = (l + r) / 2; E0!d c
if (l == r) ,zgz7
return; Bz/ba *
if ((mid - l) >= THRESHOLD) '&cH,yc;b
mergeSort(data, temp, l, mid); @T^FOTW
else /ZyMD(_J
insertSort(data, l, mid - l + 1); ,lH }Ba02F
if ((r - mid) > THRESHOLD) GL?b!4xx
mergeSort(data, temp, mid + 1, r); e|oMbTZ5m
else X):7#x@uy
insertSort(data, mid + 1, r - mid); 1^|#QMT
0si1:+t-[+
for (i = l; i <= mid; i++) { d.?}>jl
temp = data; Q/g!h}>(.
} Qyw@ r
for (j = 1; j <= r - mid; j++) { !=eNr<:V.
temp[r - j + 1] = data[j + mid]; <|l}@\iRX
} KO"/
int a = temp[l]; e*Wk;D&
int b = temp[r]; X\`']\l
for (i = l, j = r, k = l; k <= r; k++) { -6+7&.A+
if (a < b) { 5, $6mU#=
data[k] = temp[i++]; ;qaPK2a8
a = temp; pl).U#7`
} else { wH?)ZL
data[k] = temp[j--]; t,r]22I,`
b = temp[j]; /<)Vd
} l7g'z'G
} TVcA%]y{;
} d3:GmB .
l Xa/5QKC
/** X7!q/1$J
* @param data t8-P'3,Q$
* @param l !64Tx
* @param i Tc(=J7*r&
*/ (T*$4KGV
private void insertSort(int[] data, int start, int len) { s)- ;74(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4-.W~C'Q
} s$Vv
} K.xABKPVc
} 4`i8m
} Wu 0:X*>}p
To(I<W|{
堆排序： n1PptR
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package org.rut.util.algorithm.support; *,JE[M
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import org.rut.util.algorithm.SortUtil; l(NQk> w
'?Dxe B
/** ai-s9r'MI?
* @author treeroot b;b,t0wS
* @since 2006-2-2 $Wj= V
* @version 1.0 Dsm1@/"i|7
*/ ?)1Y|W'Rv
public class HeapSort implements SortUtil.Sort{ ZjmQ
w*6b%h%ww
/* (non-Javadoc) YJv$,Z&;HO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gbuh04#~
*/ CIIjZ)T
public void sort(int[] data) { i3,.E]/wX@
MaxHeap h=new MaxHeap(); upuN$4m&{
h.init(data); 1x|3|snz)
for(int i=0;i h.remove(); '|4+<#
System.arraycopy(h.queue,1,data,0,data.length); O#U maNj/
} 5VV}wR
@N4~|`?U
private static class MaxHeap{ rk8pL[|
a%r!55.
void init(int[] data){ #`u}#(
this.queue=new int[data.length+1]; S[K5ofV
for(int i=0;i queue[++size]=data; J.yM@wPS>
fixUp(size); P{9:XSa%
} U:TkO=/>:
} fLe~X!#HF
ZK]qQrIwy
private int size=0; *Y(59J2
ARu_S B
private int[] queue; }i!+d,|f
6o^>q&e}%
public int get() { SxYz)aF~
return queue[1]; 8QTry%
} R0=f`;
y5sH7`2+5
public void remove() { zgGysjV
SortUtil.swap(queue,1,size--); =c@hE'{
fixDown(1); uU 7 <8G
} ]pvHsiI:
file://fixdown Leb Kzqe
private void fixDown(int k) { yF)J7a:U
int j; I#MPJ@*WT
while ((j = k << 1) <= size) { tKt}]KHV
if (j < size %26amp;%26amp; queue[j] j++; sg,\!'
if (queue[k]>queue[j]) file://不用交换 ^# $IoW
break; ~ =u8H
SortUtil.swap(queue,j,k); :Vxt2@p{
k = j; ]S%_&ZMCM
} b;VIR,2
} &^$@LH3
private void fixUp(int k) { |X=p`iz1&
while (k > 1) { {O>Td9
int j = k >> 1; fZ-"._9UyH
if (queue[j]>queue[k]) f$>_>E
break; :Hq%y/
SortUtil.swap(queue,j,k); iOZ9A~Ywy
k = j; M1eh4IVE?
} h^(U:M=A
} (LK@w9)i;
7;p/S#P:
} 'yCVB&`b
p1'q{E+o*
} G T~rr*X
YA,.C4=s
SortUtil： s#5#WNzP
GgEg(AT
package org.rut.util.algorithm; h1q3}-
!!L'{beF
import org.rut.util.algorithm.support.BubbleSort; [,Ul
import org.rut.util.algorithm.support.HeapSort; Z><+4 '
import org.rut.util.algorithm.support.ImprovedMergeSort; (72%au
import org.rut.util.algorithm.support.ImprovedQuickSort; Ly(iq
import org.rut.util.algorithm.support.InsertSort; GOxP{d?
import org.rut.util.algorithm.support.MergeSort; N|mggz
import org.rut.util.algorithm.support.QuickSort; aO$0[-A
import org.rut.util.algorithm.support.SelectionSort; U>kaQ54/
import org.rut.util.algorithm.support.ShellSort; r4u,I<ZbH
<q'?[aKvR
/** YN)qMI_`A
* @author treeroot GdC=>\]
* @since 2006-2-2 \ 3E%6L
* @version 1.0 lFuW8G,-f@
*/ JQ ?8yl
public class SortUtil { F$i50s
public final static int INSERT = 1; 1?)h-aN
public final static int BUBBLE = 2; L2Cb/!z`c
public final static int SELECTION = 3; ?4%#myO3a
public final static int SHELL = 4; .&5 3sJ0{
public final static int QUICK = 5; W/RB|TMT
public final static int IMPROVED_QUICK = 6; %l%ad-V
public final static int MERGE = 7; UHV"<9tk
public final static int IMPROVED_MERGE = 8; }qGd*k0F0
public final static int HEAP = 9; (Qw>P42J
M`7lYw\Or!
public static void sort(int[] data) { "$5cKbJ
sort(data, IMPROVED_QUICK); DCa=o
} Foj|1zJS_
private static String[] name={ *B4OvHi)'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rLeQBp'
}; %*q^i}5)E
w[vccARQ
private static Sort[] impl=new Sort[]{ e2%mD.I
new InsertSort(), u=PLjrB~}
new BubbleSort(), !`H!!Kg0L
new SelectionSort(), iqoMQ7%
new ShellSort(), uCt?(E>
new QuickSort(), '4GN%xi
new ImprovedQuickSort(), 'o=DGm2H
new MergeSort(), /V/)A\g
new ImprovedMergeSort(), kxrYA|x
new HeapSort() +i /4G.=*
}; 6[FXgCb
wKcuIc$
public static String toString(int algorithm){ HOPl0fY$L
return name[algorithm-1]; jU 3ceXV
} //3fgoly
s,mt%^x[
public static void sort(int[] data, int algorithm) { "Qc4v@~)
impl[algorithm-1].sort(data); ;*Mr(#R
} )yz)Fw|&
u!HbS*jqq
public static interface Sort { Nw,|4S
public void sort(int[] data); 1TzwXX7
} $WRRCB/A6
^;{uop"DS
public static void swap(int[] data, int i, int j) { ]:n9MFv
int temp = data; .f[z_%ar
data = data[j]; pL*aU=FjQ
data[j] = temp; hVz]',
} !u:;Ew
} $E8}||d