[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; Q!(16
} 5VdF^.:u
int i1=l; j:B?0~=
int i2=mid+1; 0FD#9r
for(int cur=l;cur<=r;cur++){ }md[hiJ
if(i1==mid+1) +pp|Qgr 3
data[cur]=temp[i2++]; n,}\;Bp
else if(i2>r) +#7e?B
data[cur]=temp[i1++]; 37Ux2t
else if(temp[i1] data[cur]=temp[i1++]; 4^\5]d!
else '1{co/Y
data[cur]=temp[i2++]; &Iv3_T<AF
} 9gR@Q%b)
} B 3<T#
3*C9;Q}
} xD+n2:I{
?4v&TB@
改进后的归并排序: a[d6@!
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package org.rut.util.algorithm.support; s<,[xkMB
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import org.rut.util.algorithm.SortUtil; @H[)U/.
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/** *9.4AW~]X
* @author treeroot '| (#^jAj
* @since 2006-2-2 @vzv9c[
* @version 1.0 a{*r^m'N
*/ p2T<nP<Pt
public class ImprovedMergeSort implements SortUtil.Sort { \yDr
klSzmi4M
private static final int THRESHOLD = 10; aVTTpMY
T^FeahA7;
/* 7;0$UYDU*
* (non-Javadoc) w}2;f=
* J3/2>N]/}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ErZYPl
*/ m"3gTqG
public void sort(int[] data) { 2Lravb3
int[] temp=new int[data.length]; : &! >.Y
mergeSort(data,temp,0,data.length-1); ~+_|J"\
} bWp40&vx
dt -EY
private void mergeSort(int[] data, int[] temp, int l, int r) { ]<y _ =>
int i, j, k; (jQ]<q%P
int mid = (l + r) / 2; ,UOAGu<_gb
if (l == r) ~Ey)9phZK
return; X MkyX&y
if ((mid - l) >= THRESHOLD) R.ZC|bPiD
mergeSort(data, temp, l, mid); {~cG'S Y%
else 'j6)5WL$
insertSort(data, l, mid - l + 1); i,k.#Vx[m
if ((r - mid) > THRESHOLD) I,rs&m?/m
mergeSort(data, temp, mid + 1, r); vsFRWpq
else 8Xo`S<8VS
insertSort(data, mid + 1, r - mid); 6x6xv:\
Y$tgz)
for (i = l; i <= mid; i++) { A'jw;{8NpF
temp = data; B Q)1)8r
} &DUt`Dr w
for (j = 1; j <= r - mid; j++) { D7'P^*4_B
temp[r - j + 1] = data[j + mid]; 6[iuCMOZ
} 1m$< %t.>
int a = temp[l]; Muhq,>!U
int b = temp[r]; PA=.)8
for (i = l, j = r, k = l; k <= r; k++) { xt{f+c@P
if (a < b) { @(;zU~l/
data[k] = temp[i++]; a.oZ}R7'Y
a = temp; $}9.4`F>
} else { +N~?_5lv\s
data[k] = temp[j--]; zVSbEcr,C~
b = temp[j]; nWrknm
} .H.#W1`
} Oyfc!
} ?O]iX;2vM
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/** - %ul9}.
* @param data qTGEi
* @param l *2$I, ~(P
* @param i Q t!X<.
*/ h^u 9W7.
private void insertSort(int[] data, int start, int len) { > @Ux8#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NlBnV
} 3C=|
} rPk=9I
} c<'Pt4LY
} q~3dbj
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堆排序： ~AD%aHR
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package org.rut.util.algorithm.support; fvW7a8k3
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import org.rut.util.algorithm.SortUtil; %&c+}m
|@}Yady@C
/** $oefG}h2
* @author treeroot Ab]`*h\U
* @since 2006-2-2 yv.UNcP?
* @version 1.0 h\ZnUn_J
*/ ?a8 o.&`l
public class HeapSort implements SortUtil.Sort{ rt\i@}
[SluYmW
/* (non-Javadoc) YTiXUOj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~^U(GAs
*/ :hre|$@{a
public void sort(int[] data) { __}j {Buk
MaxHeap h=new MaxHeap(); 9=(*#gRd
h.init(data); hpftVEB
for(int i=0;i h.remove(); F,Ls1
System.arraycopy(h.queue,1,data,0,data.length); V~V_+
} pw^$WK
CJ*8x7-t
private static class MaxHeap{ HPGMR4=ANS
dgLE/r?
void init(int[] data){ |hsg=LX
this.queue=new int[data.length+1]; ,KXS6:1%5Y
for(int i=0;i queue[++size]=data; d!+8
fixUp(size); Wb*A};wE
} &5]&6TD6
} ;pK/t=$
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private int size=0; 89*txYmx
p^QEk~qw
private int[] queue; D%L}vugxK
~j%g?;#*
public int get() { #t.)4$
return queue[1]; T%{qwZc+mJ
} >/,7j:X
W(^R-&av
public void remove() { wc&%icF*cr
SortUtil.swap(queue,1,size--); } 0su[gy[
fixDown(1); \k?Fu=@
} nE_g^
file://fixdown FW](GWp`:
private void fixDown(int k) { 99GzhX_
int j; O=2"t%Gc
while ((j = k << 1) <= size) { ={HYwP;
if (j < size %26amp;%26amp; queue[j] j++; ,,U8X [A
if (queue[k]>queue[j]) file://不用交换 #$vQT}
break; l*~".q;S
SortUtil.swap(queue,j,k); >_R,^iH"
k = j; 6N7^`ghTf
} \6]Uj+
} 7w}PYp1Z'~
private void fixUp(int k) { h'Gs$o7#P
while (k > 1) { |f9fq~'1e
int j = k >> 1; adi^*7Q] )
if (queue[j]>queue[k]) Zo=w8Hr
break; uT")j,tz
SortUtil.swap(queue,j,k); ],!7S"{97
k = j; =f{)!uW<4
} l"T{!Oq
} ';HNQe?vT
etcpto=Mo
} l_?r#Qc7
Wciw6.@
} 71g\fGG\
CLQE@kF;
SortUtil： ,PmQ}1kGW
} `X.^}oe
package org.rut.util.algorithm; .}xF2'~E/
58vq5j<V
import org.rut.util.algorithm.support.BubbleSort; do-mkvk
import org.rut.util.algorithm.support.HeapSort; {[ E7Cf
import org.rut.util.algorithm.support.ImprovedMergeSort; Zze(Ik
import org.rut.util.algorithm.support.ImprovedQuickSort; -GqMis}c
import org.rut.util.algorithm.support.InsertSort; 834E ]2
import org.rut.util.algorithm.support.MergeSort; r.JY88"
import org.rut.util.algorithm.support.QuickSort; (toN??r
import org.rut.util.algorithm.support.SelectionSort; /:<.Cn>-
import org.rut.util.algorithm.support.ShellSort; U\<8}+x
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/** RhL!Zz
* @author treeroot Q?1' JF!G
* @since 2006-2-2 Q5!"tFp
* @version 1.0 f^EDiG>b`
*/ {H\(H_X
public class SortUtil { iJ7?6)\
public final static int INSERT = 1; 6wmMg i_m
public final static int BUBBLE = 2; @D'NoA@1A
public final static int SELECTION = 3; \Y?ByY
public final static int SHELL = 4; vv9=g*"j
public final static int QUICK = 5; GadZ!_.f
public final static int IMPROVED_QUICK = 6; ;:^^Qfp
public final static int MERGE = 7; IM^K]$q$47
public final static int IMPROVED_MERGE = 8; gM5`UH|
public final static int HEAP = 9; t+2!"Jr
F5Xj}`}bq
public static void sort(int[] data) { App9um3:
sort(data, IMPROVED_QUICK); 7I_1Lnnf
} sfN6ro
private static String[] name={ )J['0DUrZK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &'0|U{|
}; }H>}v/
Q&X#(3&'
private static Sort[] impl=new Sort[]{ ) vKZs:
new InsertSort(), o\M
new BubbleSort(), Oh|KbM*vS
new SelectionSort(), %]iDhXLr
new ShellSort(), E&wz0d;gf
new QuickSort(), HZ+l){u
new ImprovedQuickSort(), :B(vk3;U!
new MergeSort(), 15/lX
new ImprovedMergeSort(), =MsQ=:ZV
new HeapSort() 'H]&$AZ;@
}; m"r=p
Z<Pf[C
public static String toString(int algorithm){ V/8"@C
return name[algorithm-1]; OX r%b
} !qQB}sAf
9c}mAg4
public static void sort(int[] data, int algorithm) { Ei Yj`P
impl[algorithm-1].sort(data); ==?!z<I.d
} qSg=[7XOO
G 5T{*
public static interface Sort { DMcH, _(
public void sort(int[] data); FS1> J%P
} eL`}j9
a St
public static void swap(int[] data, int i, int j) { t 5{Y'
int temp = data; `/4R$E{
data = data[j]; :Nt_LsH
data[j] = temp; L (#DVF
} Z.iQm{bI
} O #