[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; s|HpN
} lB)%s~P:s
int i1=l; +9gI^Gt
int i2=mid+1; =bKz$ _W
for(int cur=l;cur<=r;cur++){ XS#Jy n
if(i1==mid+1) ??5y0I6+
data[cur]=temp[i2++]; Dfhu
else if(i2>r) n<,:;0{
data[cur]=temp[i1++]; <DeC^[-P
else if(temp[i1] data[cur]=temp[i1++]; 3bK.8
else |NMf'$
data[cur]=temp[i2++]; 3g79pw2w=
} )\aCeY8o
} ce56$L8[
7l%]O}!d)
} 9N[(f-`
wmV7g7t6
改进后的归并排序: O~P1d&:L
xxy (#j$
package org.rut.util.algorithm.support; b?^CnMO
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import org.rut.util.algorithm.SortUtil; WNnB s
\|@u)n_
/** _s{;9&qX]
* @author treeroot WMi$ATq
* @since 2006-2-2 >PbB /->
* @version 1.0 ~SzHIVj:6
*/ Nh^ lC
public class ImprovedMergeSort implements SortUtil.Sort { 4 *n4P
I@/s&$H`l
private static final int THRESHOLD = 10; =# /BCL7
hnYL<<AA
/* r'F)8%
* (non-Javadoc) /`kM0=MMa
* <Jc :a?ICe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %VH{bpS|i:
*/ ?zpN09e
public void sort(int[] data) { 6lAHB*`
int[] temp=new int[data.length]; 'G)UIjl
mergeSort(data,temp,0,data.length-1); QJ4=*tX)
} ztEM>xsk
[z[<onFIq
private void mergeSort(int[] data, int[] temp, int l, int r) { /LK,:6
int i, j, k; 2%Mgg,/~
int mid = (l + r) / 2; '}5Yc,
if (l == r) [`n)2} k
return; XG!s+ShFV
if ((mid - l) >= THRESHOLD) :aHLr[%Mz
mergeSort(data, temp, l, mid); Ht,+KbB
else b'O>qQ
insertSort(data, l, mid - l + 1); \cx==[&(
if ((r - mid) > THRESHOLD) <*Bk.>f!
mergeSort(data, temp, mid + 1, r); c0U=Hj@@
else {t%Jc~p{
insertSort(data, mid + 1, r - mid); fbrCl!%P
`b:yW.#w3l
for (i = l; i <= mid; i++) { Z#vU~1W
temp = data; 7Zw.mM!i
} Wm^RfxgN/
for (j = 1; j <= r - mid; j++) { KD=W(\
temp[r - j + 1] = data[j + mid]; o4t6NDa
} I]iTD
int a = temp[l]; `^mY*Cb e
int b = temp[r]; oMeIXb)z
for (i = l, j = r, k = l; k <= r; k++) { wa%;'M&
if (a < b) { AuIg=-xR
data[k] = temp[i++]; )`,Y^`F2
a = temp; N<e72x
} else { kSUpEV+/
data[k] = temp[j--]; !(i}FFn{:
b = temp[j]; NpAZuISD!
} X3zpU7`Av+
} e-EY]%JO
} <|>7?#s2=
p:Hg>Z
/** 9#MY(Hr
* @param data -d)+G%{
* @param l p0sq{d~
* @param i o>jM4sk$
*/ Ad)::9K?J
private void insertSort(int[] data, int start, int len) { 6k+4R<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &|YJ?},
} _q z^|J
} Iw[7;B5v
} HP(dhsd<c
} [k{2)g
b^^ .$Gu
堆排序： Q:^.Qs"IK
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package org.rut.util.algorithm.support; ~\khwNA
O.z\ VI2f
import org.rut.util.algorithm.SortUtil; |PxTm
fq<JX5DER
/** s ;2ih)[
* @author treeroot BI|YaZa+p
* @since 2006-2-2 :lE_hY
* @version 1.0 $I|6v
*/ rHpxk
public class HeapSort implements SortUtil.Sort{ FMEW['
k0@*Up3{7
/* (non-Javadoc) P}~nL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^-2|T__
*/ /Bs42uJ3
public void sort(int[] data) { N9cCfB\`
MaxHeap h=new MaxHeap(); U["-`:>jfp
h.init(data); DkJ "#8Yl=
for(int i=0;i h.remove(); JU3to_Io
System.arraycopy(h.queue,1,data,0,data.length); 73kU\ux
} 0BrAgv"3a_
$_f"NE}
private static class MaxHeap{ .I%`yhCW
>m+Fm=
void init(int[] data){ I%M"I0FV
this.queue=new int[data.length+1]; t.pn07$
for(int i=0;i queue[++size]=data; z(eAhK}6?
fixUp(size); T)o>U&KNP
} ]114\JE
} !g7lJ\B
1LVO0lT
private int size=0; zff<#yK1
QWI)Y:<K/
private int[] queue; s"JD,gm$
5>\~jf
public int get() { )>;V72
return queue[1]; 952l1c!
} *;:dJXR
oM(8'{S=
public void remove() { }l7@:ezZZ7
SortUtil.swap(queue,1,size--); :^rt8>~
fixDown(1); 0b(x@>
} h.jO3q
file://fixdown s8.SEk|pB
private void fixDown(int k) { SLU$DW;t
int j; CK9FAuU
while ((j = k << 1) <= size) { G\(cnqHk
if (j < size %26amp;%26amp; queue[j] j++; W9!K~g_
if (queue[k]>queue[j]) file://不用交换 {RC&Ub>
break; :5[1Iepdn
SortUtil.swap(queue,j,k); @! {Y9k2
k = j; e+<'=_x {
} .]YTS
} 7q(A&
private void fixUp(int k) { Ctx`b[&KXX
while (k > 1) { 5@_kGoqd
int j = k >> 1; d1';d6.u\
if (queue[j]>queue[k]) Tfp^h~&u
break; /m|U2rrqb
SortUtil.swap(queue,j,k); ):lH
k = j; 26ae|2?
} l i) 5o
} UY(\T8
F R(k==pZ
} hn=tSlte
-*$ s ;G#
} Zo<j"FG
hQ (84u
SortUtil： t76B0L{
^X;p8uBo
package org.rut.util.algorithm; 6aKfcvf &
<,*3Av
import org.rut.util.algorithm.support.BubbleSort; 2(U;{;\n*
import org.rut.util.algorithm.support.HeapSort; ^*"i *e
import org.rut.util.algorithm.support.ImprovedMergeSort; >%H(0G#X
import org.rut.util.algorithm.support.ImprovedQuickSort; 2b K1.BD
import org.rut.util.algorithm.support.InsertSort; L;-V Yo#
import org.rut.util.algorithm.support.MergeSort; an2Yluc;
import org.rut.util.algorithm.support.QuickSort; <q&4Y+b
import org.rut.util.algorithm.support.SelectionSort; 8d7 NESYl
import org.rut.util.algorithm.support.ShellSort; Y_<-.?jf
G8&/Ic
/** g'AxJ
* @author treeroot 8"}8Nrb0
* @since 2006-2-2 8.:WMH`
* @version 1.0 -B& Nou
*/ K\FLA_J
public class SortUtil { 3sD|R{
public final static int INSERT = 1; 1:!H`*DU&
public final static int BUBBLE = 2; *yv@B!r
public final static int SELECTION = 3; F:og:[
public final static int SHELL = 4; 01~ nC@;
public final static int QUICK = 5; SuXeUiK.[
public final static int IMPROVED_QUICK = 6; ejc>
public final static int MERGE = 7; zGNmc7
public final static int IMPROVED_MERGE = 8; K /$-H#;N
public final static int HEAP = 9; (H8JV1J
i1ScXKO
public static void sort(int[] data) { [1nUq!uTm
sort(data, IMPROVED_QUICK); Mc&Fj1h5
} 6Ey@)p..E
private static String[] name={ EbG&[v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @H8DGeM
}; x4K A8
@N]]Cf>x
private static Sort[] impl=new Sort[]{ 1obajN
new InsertSort(), ~=Q^]y,
new BubbleSort(), Sc]G7_
new SelectionSort(), /0o#V-E)
new ShellSort(), OA^6l#
new QuickSort(), Y?$
new ImprovedQuickSort(), 'Y.6sB
new MergeSort(), m(D+!I9
new ImprovedMergeSort(), aS``fE;O
new HeapSort() |`xM45
}; RO@=&3s
hd]ts.
public static String toString(int algorithm){ R?IRE91 :
return name[algorithm-1]; Y?3f Fg
} 0Py*%}r1
a`R_}nus*
public static void sort(int[] data, int algorithm) { ]tzF Ob
impl[algorithm-1].sort(data); 7pou(U
} IdM~' Q>\
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public static interface Sort { q[GDK^-g
public void sort(int[] data); lQd7p+21
} txvo7?Y*4
O4Q"2
public static void swap(int[] data, int i, int j) { `?O0)
int temp = data; 7MGvw-Tpb7
data = data[j]; qtmKX
data[j] = temp; {PR "}x
} rzs-c ?
} )xiu \rC