[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; fJg+Ryo
} UK!(G
int i1=l; n[rCQdM&U"
int i2=mid+1; $UwCMPs X
for(int cur=l;cur<=r;cur++){ `c$V$/IT
if(i1==mid+1) upmx $H>
data[cur]=temp[i2++]; mfr|:i
else if(i2>r) y9ZvV0
data[cur]=temp[i1++]; F^:3?JA_
else if(temp[i1] data[cur]=temp[i1++]; 75lA%| *X
else gbA_DZ
data[cur]=temp[i2++]; l/5 hp.
} [/r(__.
} `a/`,N
_[BP0\dPW
} hZb_P\1X
/n&&Um\
改进后的归并排序: @0''k
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package org.rut.util.algorithm.support; {JLtE{
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import org.rut.util.algorithm.SortUtil; TWTb?HP
h?U O&(
/** i%?*@uj
* @author treeroot P%n>Tg80M
* @since 2006-2-2 a<e[e>
* @version 1.0 SpBy3wd
*/ ~xTt204S
public class ImprovedMergeSort implements SortUtil.Sort { LghfM"g
u ga_T
private static final int THRESHOLD = 10; 6u6x
A#,ZUOPGH
/* ;'1d1\wiDQ
* (non-Javadoc) V7/Rby Q
* xE}>,O|'q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pxi3PY?
*/ H5an%kU|j
public void sort(int[] data) { DY*N|OnqJ
int[] temp=new int[data.length]; EU#^7
mergeSort(data,temp,0,data.length-1); |7~<Is~*
} 6S#Cl>v
Z\sDUJ
private void mergeSort(int[] data, int[] temp, int l, int r) { ]4e;RV-B
int i, j, k; %yC,^
int mid = (l + r) / 2; v$9y,^p@e
if (l == r) pgo$61
return; DmcZta8n]
if ((mid - l) >= THRESHOLD) 1Y,Z %d
mergeSort(data, temp, l, mid); yhJ@(tu.Gd
else :4|4=mkr
insertSort(data, l, mid - l + 1); !)$Zp\Sg
if ((r - mid) > THRESHOLD) ~TtiO#,t
mergeSort(data, temp, mid + 1, r); +ZV5o&V>
else /9X7A;O
insertSort(data, mid + 1, r - mid); Hn:Crl y#
b.938#3,
for (i = l; i <= mid; i++) { <UCl@5g&
temp = data; /wG2vE8e
} '+ ?X
for (j = 1; j <= r - mid; j++) { +7}]E1Uf
temp[r - j + 1] = data[j + mid]; j<$2hiI/?&
} l,).p
int a = temp[l]; HaYo!.(Fv
int b = temp[r]; ;*J
for (i = l, j = r, k = l; k <= r; k++) { !R$`+wZ62
if (a < b) { \)e'`29;
data[k] = temp[i++]; d;>QhoiL
a = temp; ~LC-[&$
} else { KPki}'GO
data[k] = temp[j--]; CC`JZ.SO
b = temp[j]; 7EJ+c${e.-
} $cgcX
} +ge?w#R
} tJmTBsn
2 E=L8<
/** ;VK.2^jW!
* @param data ~J]qP#C
* @param l rl.}%Ny
* @param i XPPdwTOr
*/ '%;m?t%q
private void insertSort(int[] data, int start, int len) { nt<]d\o0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d-%hjy3N
} EM_d8o)`B
} gM]:Ma
} d zMb5puH
} MK*r+xfSae
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堆排序： TqQ[_RKg2
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package org.rut.util.algorithm.support; Nboaf
OTv)
import org.rut.util.algorithm.SortUtil; \7_y%HR
{RPI]DcO/
/** V[V[~;Py
* @author treeroot iow"n$/
* @since 2006-2-2 Ul# r
* @version 1.0 )%]J>&/0J
*/ 3' 'me
public class HeapSort implements SortUtil.Sort{ IGgL7^MF
,: ^u-b|
/* (non-Javadoc) }0 ?3:A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iDD$pd,e\
*/ 8CE = 4
public void sort(int[] data) { iRBfx
MaxHeap h=new MaxHeap(); +,l-Nz
h.init(data); 'fW-Y!k%
for(int i=0;i h.remove(); mZBo~(}
System.arraycopy(h.queue,1,data,0,data.length); ig"L\ C"T
} tX[WH\(xI
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private static class MaxHeap{ 1Ws9WU
H*6W q
void init(int[] data){ R-14=|7a-
this.queue=new int[data.length+1]; #;S*V"
for(int i=0;i queue[++size]=data; v^PO|Z
fixUp(size); NlXimq
} 1mJHued=6
} r<\u6jF
[B3RfCV{
private int size=0; M\=2uKG#
)}vl\7=
private int[] queue; ! P4*+')M
#E]59_
public int get() { 4K74=r),i
return queue[1]; *ui</+
} vSh`&w^*
?ubro0F:
public void remove() { 5-M-X#(
SortUtil.swap(queue,1,size--); '>" 4
fixDown(1); ^@]3R QB
} `mqMLo*
file://fixdown \NC3'G:Ii
private void fixDown(int k) { nFn5v'g
int j; P;*(hY5&
while ((j = k << 1) <= size) { :EyD+!LJ
if (j < size %26amp;%26amp; queue[j] j++; E"0>yl)
if (queue[k]>queue[j]) file://不用交换 >d6|^h'0
break; adw2x pj
SortUtil.swap(queue,j,k); .(vwIb8\_
k = j; {Ha57Wk8D
} M3AXe]<eC1
} Pc9H0\+Xk
private void fixUp(int k) { v0y(58Rz.
while (k > 1) { 0IpmRH/
int j = k >> 1; /tLVX} &
if (queue[j]>queue[k]) 0$njMnB2l
break; #;<Y[hR{P
SortUtil.swap(queue,j,k); Js;h%
k = j; hOeRd#AQK
} z)"=:o7
} ~s{$WL&
svSVG:48
} f!"w5qC^
E_`=7i
} @XVTU
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SortUtil： Ep}s}Stlr}
W8<%[-r
package org.rut.util.algorithm; %$mA03[MQ
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import org.rut.util.algorithm.support.BubbleSort; s@C}P
import org.rut.util.algorithm.support.HeapSort; =Sv/IXX\di
import org.rut.util.algorithm.support.ImprovedMergeSort; <uJ@:oWG7
import org.rut.util.algorithm.support.ImprovedQuickSort; |g~ZfnP_%
import org.rut.util.algorithm.support.InsertSort; \DzGQ{`~m
import org.rut.util.algorithm.support.MergeSort; yHGADH0B
import org.rut.util.algorithm.support.QuickSort; pXUSLs
import org.rut.util.algorithm.support.SelectionSort; (#'>(t(4
import org.rut.util.algorithm.support.ShellSort; @@%ataUSBT
q*KAk{kR(v
/** 16 $B>
* @author treeroot ;nGa.= "L
* @since 2006-2-2 o}!PQ#`M
* @version 1.0 ME dWLFf
*/ DrQ`]]jj7
public class SortUtil { /E>e"tvss
public final static int INSERT = 1; [!z,lY>
public final static int BUBBLE = 2; u4j5w
public final static int SELECTION = 3; Q20%"&Xp]
public final static int SHELL = 4; he4(hX^
public final static int QUICK = 5; )*[3Vq
public final static int IMPROVED_QUICK = 6; BzzTGWq\
public final static int MERGE = 7; :Sma`U&
public final static int IMPROVED_MERGE = 8; g5yJfRLxp
public final static int HEAP = 9; ]?*wbxU0
r3Ykz%6
public static void sort(int[] data) { /o[w4d8
sort(data, IMPROVED_QUICK); Q;u pau
} HV.t6@\};
private static String[] name={ O84i;S+-p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #F#%`Rv1
}; A's{j7
g){<y~Mk
private static Sort[] impl=new Sort[]{ RZ7@cQY
new InsertSort(), XRH!]!
new BubbleSort(), Uv.)?YeGh
new SelectionSort(), 40/Y\
new ShellSort(), %LV9=!w
new QuickSort(), ..qCPlK;
new ImprovedQuickSort(), YMgNzu
new MergeSort(), G?ZXWu.
new ImprovedMergeSort(), weQ_*<5%
new HeapSort() 8RX&k
}; uS-|wYE
2?5>o!C
public static String toString(int algorithm){ q@qsp&0/
return name[algorithm-1]; "#]$r
} e!Hhs/&!T
_^;Z~/.
public static void sort(int[] data, int algorithm) { : 'c&,oLY
impl[algorithm-1].sort(data); xmG<]WF>E
} VnzZTGs
d@^ZSy>L2
public static interface Sort { u"8yK5!
public void sort(int[] data); Q@niNDaW2
} zTp"AuNHN
hc1N~$3!G
public static void swap(int[] data, int i, int j) { =WLY6)]A
int temp = data; SIllU
data = data[j]; yr6V3],Tp
data[j] = temp; "zc l|@
} nEfK53i_
} <[v[ci