[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; [,zq
} 4U}qrN~=
int i1=l; "/W[gP[y%
int i2=mid+1; Ni,nQ;9
for(int cur=l;cur<=r;cur++){ uDF;_bli)H
if(i1==mid+1) Fhoyji4
data[cur]=temp[i2++]; kBu{ bxL
else if(i2>r) oaoTd$/5
data[cur]=temp[i1++]; /R)wM#&
else if(temp[i1] data[cur]=temp[i1++]; >[}oH2oi
else hx;f/EPx
data[cur]=temp[i2++]; OrY[
} ^Co-!jM
} \/a6h
{MUB4-@?F$
} r~4uIUE{
7u):J
改进后的归并排序: rO1!h%&o"
3*b5V<}'|
package org.rut.util.algorithm.support; w:~*wv
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import org.rut.util.algorithm.SortUtil; x]~TGzS
$XBK_ 5
/** ?^}30V:E
* @author treeroot TCtZ2 <'
* @since 2006-2-2 _VtQMg|u
* @version 1.0 {zdMmpQF
*/ *H>rvE.K?
public class ImprovedMergeSort implements SortUtil.Sort { u;#]eUk9}
:=*deZ<
private static final int THRESHOLD = 10; 9"[;ld<
).k DY?s
/* @-N` W9
* (non-Javadoc) TJ|Jv8j<s
* I2cz:U7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7s9h:/Lu
*/ wj|Zn+{"nF
public void sort(int[] data) { 7N.b-}$(
int[] temp=new int[data.length]; >DqF>w.1
mergeSort(data,temp,0,data.length-1); 'M90Yia
} sp9gz~Kq
\mqx '
private void mergeSort(int[] data, int[] temp, int l, int r) { c8RJOc4X
int i, j, k; Q?{%c[s
int mid = (l + r) / 2; U84W(X
if (l == r) P]E-Wp'p
return; 5j%G7.S\
if ((mid - l) >= THRESHOLD) 6SSDc/
mergeSort(data, temp, l, mid); \l%xuT
else ny={OhP-
insertSort(data, l, mid - l + 1); ~E<2gMKjO
if ((r - mid) > THRESHOLD) d:H'[l.F%
mergeSort(data, temp, mid + 1, r); l'@-?p(Vuw
else VJh8`PVX
insertSort(data, mid + 1, r - mid); SC{m@
U$rMZk
for (i = l; i <= mid; i++) { Yo-}uTkw
temp = data; 4E'9;tA3l
} 2iAC_"n
for (j = 1; j <= r - mid; j++) { 5E:$\z;
temp[r - j + 1] = data[j + mid]; 5of3&
} zM0NRERi
int a = temp[l]; =W(*0"RM
int b = temp[r]; B5e9'X^ [
for (i = l, j = r, k = l; k <= r; k++) { p6VD*PT$&
if (a < b) { Z6jEj9?O
data[k] = temp[i++]; *6uccx7{
a = temp; ?GhyVXS y.
} else { 8~sP{V%
data[k] = temp[j--]; )8Va%{j
b = temp[j]; ~6vz2DuB=
} >yIJ8IDF
} xo:kT)
} "L~(%Nx3
6|TSH$w_
/** O 4 !$
* @param data CSk]c9=
* @param l dWqn7+:
* @param i *[Hrbln
*/ 5xY{Q
private void insertSort(int[] data, int start, int len) { #cbgp;,M{I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (!j#u)O
} 6CJMQi,kn
} 8;PkuJR_]
} yNTd_XPL
} IThd\#=
. ,7bGY 1$
堆排序： p!.~hw9
~%{2Z_t$
package org.rut.util.algorithm.support; PnsBDf%v
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import org.rut.util.algorithm.SortUtil; GK?ual1
^0VL](bD>
/** KKeMi@N
* @author treeroot %!|w(Povq
* @since 2006-2-2 }d$-:l,w
* @version 1.0 ?ukw6T
*/ ?Ua,ba*
public class HeapSort implements SortUtil.Sort{ S_}`'Z )
Cj5mM[:s
/* (non-Javadoc) :<%bAn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t=_^$M,yr
*/ lQA5HzC\
public void sort(int[] data) { 50UdY9E_v}
MaxHeap h=new MaxHeap(); 9&Y@g)+2
h.init(data); @Z)|_
for(int i=0;i h.remove(); +A9~h/"kt
System.arraycopy(h.queue,1,data,0,data.length); $ /VQsb
} %Bq~b$
Bx\&7|,x
private static class MaxHeap{ DM.lQ0xk
r8k(L{W
void init(int[] data){ $KHm5*;nd
this.queue=new int[data.length+1]; kmB!NxF>)F
for(int i=0;i queue[++size]=data; !^J;S%MB:K
fixUp(size); !iXRt")
} \1EuHQ?
} b*|~F
7Z-j'pq
private int size=0; Z%T Ajm
9tiZIm93]
private int[] queue; g40Hj Y
OATdmHW
public int get() { jm0p%%z
return queue[1]; _=v#"l
} +z >)'#
OG\i?N
public void remove() { )0{`}7X
SortUtil.swap(queue,1,size--); Aq i:h]x
fixDown(1); m0HK1'
} .hTqZvDa
file://fixdown Q=~"xB8
private void fixDown(int k) { PK*Wu<<
int j; \0$+*ejz
while ((j = k << 1) <= size) { Q PH=`s
if (j < size %26amp;%26amp; queue[j] j++; A=|XlP$6
if (queue[k]>queue[j]) file://不用交换 _0H oJ
break; UBvp32p
SortUtil.swap(queue,j,k); i,Ct AbMx
k = j; 56.!L
} 0.GFg${v`
} z2=bbm:
private void fixUp(int k) { V>6klA}o
while (k > 1) { F^ q{[Z
int j = k >> 1; 4vhf!!1
if (queue[j]>queue[k]) MlO OB
break; )XI[hVUA
SortUtil.swap(queue,j,k); X1o",,N^M
k = j; 3bEcKA_z(
} y]9R#\P/
} \i.]-k
dab]>% M
} ]>3Y~KH(
)|gw5N4;
} 6jE.X
&OR(]Wt0
SortUtil： ;$p!dI\-Q
43=v2P0=Tj
package org.rut.util.algorithm; !pU$'1D
fI.|QD*$b
import org.rut.util.algorithm.support.BubbleSort; Y2|i>5/|<
import org.rut.util.algorithm.support.HeapSort; z4u&#.bU
import org.rut.util.algorithm.support.ImprovedMergeSort; <T2O^
import org.rut.util.algorithm.support.ImprovedQuickSort; {QG.> lB
import org.rut.util.algorithm.support.InsertSort; a`O'ZY
import org.rut.util.algorithm.support.MergeSort; .jrNi=BP*
import org.rut.util.algorithm.support.QuickSort; .#EU@Hc
import org.rut.util.algorithm.support.SelectionSort; \S}/2]* 1
import org.rut.util.algorithm.support.ShellSort; zAgX{$/Fg
Z0gtliJ@
/** Y;'<u\^M"
* @author treeroot D 0Xl`0"'
* @since 2006-2-2 p1N}2]e
* @version 1.0 IQqUFP$8g
*/ F)3+IuY
public class SortUtil { lyn%r
public final static int INSERT = 1; TrI+F+;
public final static int BUBBLE = 2; R'BB-
public final static int SELECTION = 3; :e<jD_.X
public final static int SHELL = 4; MU<(O}
public final static int QUICK = 5; 6?Ncgj &@
public final static int IMPROVED_QUICK = 6; Om3Ayk}
public final static int MERGE = 7; ^WA7X9ed
public final static int IMPROVED_MERGE = 8; *ug~LK5Y.
public final static int HEAP = 9; v^"\e&XL
B,b8\\^k|
public static void sort(int[] data) { "Eh=@?]S_
sort(data, IMPROVED_QUICK); ax@H^Gj@2
} z} fpV T
private static String[] name={ AD?zBg Zu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 41 F;X{Br
}; N8A)lYT]_u
)JMqC+J3*t
private static Sort[] impl=new Sort[]{ k4+vI1Cs
new InsertSort(), ?v^NimcZ
new BubbleSort(), M/S~"iD
new SelectionSort(), *l5?_tF
new ShellSort(), #W\}v(Ke
new QuickSort(), ;i@S}LwL
new ImprovedQuickSort(), Yf0 KG
new MergeSort(), DrRK Sc(u9
new ImprovedMergeSort(), +n^M+ea;
new HeapSort() JCWTB`EB>
}; +!lDAkW0
qS?o22
public static String toString(int algorithm){ p fc6;K:d
return name[algorithm-1]; PD#,KqL:
} <4r8H-(%
reu[rZ&
public static void sort(int[] data, int algorithm) { %;`Kd}CO
impl[algorithm-1].sort(data); (j}7|*.
} <J509j
j>8DaEfwx
public static interface Sort { ;|Cdq
public void sort(int[] data); b.*LmSX#
} c^}G=Z1@
.*zN@y3
public static void swap(int[] data, int i, int j) { ^O|fw?,
int temp = data; y2W+YV*
data = data[j]; /x3*oO1
data[j] = temp; pBtO1x6x/
} `[H^`
} :7e*- '