[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; 4=?Ok":8
} 8>%jZ%`a
int i1=l; /o<}]]YBF
int i2=mid+1; ,wry u|7"$
for(int cur=l;cur<=r;cur++){ ;[WSf{k
if(i1==mid+1) O4b-A3:
data[cur]=temp[i2++]; w*&n(zJF>
else if(i2>r) <2o.,2?G
data[cur]=temp[i1++]; g(@$uJ
else if(temp[i1] data[cur]=temp[i1++]; P+*rWJ8gQ
else y]z)jqX<
data[cur]=temp[i2++]; ?1-n\ka
} aIzp\$NWVK
} [#STR=_f
)+jK0E1
} g9FVb7In_
eI/\I:G{f
改进后的归并排序: Rk437vQD,
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package org.rut.util.algorithm.support; -7Aw s)
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import org.rut.util.algorithm.SortUtil; }\`-G+i{W
Z3X&<Y5
/** /JK-}E
* @author treeroot /VhE<}OtH
* @since 2006-2-2 ;EE&~&*w
* @version 1.0 fwnYzd3
*/ dCoi>PO
public class ImprovedMergeSort implements SortUtil.Sort { a.Rp#}f
1,%#O;ya
private static final int THRESHOLD = 10; RF,=bOr19
3IJI5K_
/* QigoRB!z#9
* (non-Javadoc) Ads<-.R
* ^;Hi/KvM\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FkJ>]k
*/ !Z+*",]_
public void sort(int[] data) { xu_XX#9?b
int[] temp=new int[data.length]; U'h[{ek
mergeSort(data,temp,0,data.length-1); ard3yNQt
} 'n>3`1E,
(8@hF#N1
private void mergeSort(int[] data, int[] temp, int l, int r) { lE2wkY9^/
int i, j, k; Oc"'ay(g
int mid = (l + r) / 2; :~0^ib<v;
if (l == r) 9(N)MT5F
return; [o[v"e\w
if ((mid - l) >= THRESHOLD) cmr6,3_
mergeSort(data, temp, l, mid); njwR~aL`|
else [A%e6
insertSort(data, l, mid - l + 1); @KXz4PU
if ((r - mid) > THRESHOLD) 08K.\3
mergeSort(data, temp, mid + 1, r); 3@Zz-~4Td
else V'.eesN
insertSort(data, mid + 1, r - mid); bWC~Hv
1EAVMJ
for (i = l; i <= mid; i++) { jy__Y=1}
temp = data; @E"+qPp.3
} ;@7#w
for (j = 1; j <= r - mid; j++) { p^zEfLTU
temp[r - j + 1] = data[j + mid]; %<ptkZK#
} ^7s6J{<
int a = temp[l]; :#W>SO
int b = temp[r]; Hs4zJk
for (i = l, j = r, k = l; k <= r; k++) { P^_d$
if (a < b) { r"u(!~R
data[k] = temp[i++]; 'Qs3
a = temp; !s[j1=y
} else { 6(<~1{ X%
data[k] = temp[j--]; ]=86[A-2N
b = temp[j]; UTK.tg
} ev;5?9\E
} "-j@GCme
} I3zitI;
Pdo5sve
/** lc$@Jjg9
* @param data uZ2v;]\Y6
* @param l 9tc@
* @param i &h4Z|h[01
*/ l=-dK_I?
private void insertSort(int[] data, int start, int len) { \")YKN=W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9h,yb4jPP
} v4k=NH+w
} :DX/r
} [[66[;
} t6L^ #\'
[@. jL0>
堆排序： ">D(+ xr!)
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package org.rut.util.algorithm.support; c;|&>Fp
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import org.rut.util.algorithm.SortUtil; <>*''^
]-s`#
/** _9O }d
* @author treeroot i2ml[;*,N
* @since 2006-2-2 _qzo):G.s
* @version 1.0 4Tzu"y
*/ B=Jd%Av
public class HeapSort implements SortUtil.Sort{ 0.Ol@fO
=<FZ{4
/* (non-Javadoc) 3d)+44G_)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c"sw@<HG
*/ _OxnHf:|
public void sort(int[] data) { .&yWHdQC:
MaxHeap h=new MaxHeap(); (27F
h.init(data); jf)JPa_
for(int i=0;i h.remove(); $evuPm8G
System.arraycopy(h.queue,1,data,0,data.length); tSXjp
} _Fh0^O@
p2NB~t7Z
private static class MaxHeap{ X8l1xD
Q-dHR i
void init(int[] data){ f?<M3P
this.queue=new int[data.length+1]; $E~Lu$|
for(int i=0;i queue[++size]=data; CL}I:/zRB
fixUp(size); n$![b_)*
} DwrCysIK
} ?e_}X3{
R?9Plzt5
private int size=0; WlLZtgq
k;:u| s8NS
private int[] queue; 36Z`.E>~L
^nm!NL{z^
public int get() { Boj{+rE0
return queue[1]; AO7qs:+
} cSs/XJZ
S~(VcC$K
public void remove() { -JO46 #m
SortUtil.swap(queue,1,size--); o(SJuZC/U
fixDown(1); Z-p^3t'{
} &lfF!
file://fixdown Pymh^i
private void fixDown(int k) { p*&LEjaVM4
int j; uy-Ncy
while ((j = k << 1) <= size) { xo 'w+Av
if (j < size %26amp;%26amp; queue[j] j++; w*ktx{
if (queue[k]>queue[j]) file://不用交换 &fy8,}
break; yExyx?j.
SortUtil.swap(queue,j,k); m}'@S+k^
k = j; Rw=E_q{
} Joo)GIB
} @k #y-/~?
private void fixUp(int k) { ]<_!@J6k
while (k > 1) { %C][E^9
int j = k >> 1; >]|^Ux,WZ
if (queue[j]>queue[k]) dvWlx]'
break; K$vRk5U
SortUtil.swap(queue,j,k); +bd{W]={
k = j; MGC0^voe
} -bu. *=
} zr9Pm6Rl
&E'>+6
} fU~y481A
S_-mmzC(
} _,?HrL9
6)<oO(
SortUtil： -Izg&u &
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package org.rut.util.algorithm; hgr ,v"
z'K7J'(R
import org.rut.util.algorithm.support.BubbleSort; G}xBYc0b
import org.rut.util.algorithm.support.HeapSort; N)y;owgo
import org.rut.util.algorithm.support.ImprovedMergeSort; l YA+k5
import org.rut.util.algorithm.support.ImprovedQuickSort; %7wzGtM]ps
import org.rut.util.algorithm.support.InsertSort; k#+^=F^)I
import org.rut.util.algorithm.support.MergeSort; cCKda3v!O
import org.rut.util.algorithm.support.QuickSort; *ik)>c_
import org.rut.util.algorithm.support.SelectionSort; B=/=U7T
import org.rut.util.algorithm.support.ShellSort; &>4$ [m>n
9U1!"/F
/** so&3A&4cL
* @author treeroot (qONeLf%
* @since 2006-2-2 os ud
* @version 1.0 :*%\i' $!/
*/ e/D\7Pf
public class SortUtil { ,ZW.P`
public final static int INSERT = 1; a#GqJ?nY
public final static int BUBBLE = 2; (xJBN?NRO
public final static int SELECTION = 3; "MP{z~Mmj
public final static int SHELL = 4; \`9|~!,Ix7
public final static int QUICK = 5; `CouP-g.
public final static int IMPROVED_QUICK = 6; 9>, \QrrH
public final static int MERGE = 7; *<5lx[:4/x
public final static int IMPROVED_MERGE = 8; iZ;jn8
public final static int HEAP = 9; sh3}0u+
Ec/+9H6g
public static void sort(int[] data) { BU\NBvX$
sort(data, IMPROVED_QUICK); cJ{P,K
} -;.fU44O[#
private static String[] name={ }(O kl1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1L9 <1
}; EHJc*WFPU-
QncS&
private static Sort[] impl=new Sort[]{ E0Xu9IW/A
new InsertSort(), S?WUSx*N
new BubbleSort(), [beuDZA
new SelectionSort(), zMg^2{0L
new ShellSort(), ~2;y4%K
new QuickSort(), = $Yk8,
new ImprovedQuickSort(), ;b2>y>?[
new MergeSort(), RaqrVC
new ImprovedMergeSort(), TU6EE
new HeapSort() ~a)20
}; r|$g((g
KiHAm|,
public static String toString(int algorithm){ 7cQw?C
return name[algorithm-1]; ht!:e>z&4
} goWt!,&f
}E_zW.{!
public static void sort(int[] data, int algorithm) { j+v)I=
impl[algorithm-1].sort(data); X,Q(W0-6$u
} %j`]x -aOz
,FPgs0rrS
public static interface Sort { !LESRh?
public void sort(int[] data); ~$Yuxo
} p`C5jfI
05DtU!3O
public static void swap(int[] data, int i, int j) { ]sIFK
int temp = data; ]z@]Fi33Y
data = data[j]; R|yTUGY
data[j] = temp; ,peFNpi
} LDNUywj@w
} `Q[$R&\