[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; 5~GHAi
} #6O<!{PH6
int i1=l; 1#rcxUSi
int i2=mid+1; .bcoH
for(int cur=l;cur<=r;cur++){ Y*0AS|r!
if(i1==mid+1) +o+e*B7Eh
data[cur]=temp[i2++]; NN(ZH73
else if(i2>r) t5 :4'%|
data[cur]=temp[i1++]; GG0l\!2)
else if(temp[i1] data[cur]=temp[i1++]; 0X6|pC~
else v%gkQa
data[cur]=temp[i2++]; 9z>I&vcX
} :&*Y Io
} *d%"/l^0
@'UbTB!
} YC(7k7
pW{Q%"W
改进后的归并排序: M\4pTcz{
SMX70T!'9
package org.rut.util.algorithm.support; 3$x[{\ {
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import org.rut.util.algorithm.SortUtil; D c5tRO
>TZ 'V,
/** iveJh2!#<
* @author treeroot (C{l4
* @since 2006-2-2 .!#0eAT
* @version 1.0 nymF`0HYe1
*/ $7k"?M_
public class ImprovedMergeSort implements SortUtil.Sort { -!_f-Nny
qfJi[8".
private static final int THRESHOLD = 10; ./SDZ:5/
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/* PeD>mCvL"
* (non-Javadoc) ]B8`b
* lG[@s 'j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =j,2
*/ -G\svwv@)
public void sort(int[] data) { $;GH -+
int[] temp=new int[data.length]; Vl"20):
mergeSort(data,temp,0,data.length-1); <%d/"XNg[D
} |"}F cS y
.`./MRC
private void mergeSort(int[] data, int[] temp, int l, int r) { 1Q[I$=-F
int i, j, k; "cJ))v-'
int mid = (l + r) / 2; ;U+4!N
if (l == r) QT\||0V~p
return; Ag[Zs%X
if ((mid - l) >= THRESHOLD) Kkfza
mergeSort(data, temp, l, mid); is?#wrV=K
else FA5|`
insertSort(data, l, mid - l + 1); =|}_ASbzw
if ((r - mid) > THRESHOLD) 8PKUg "p
mergeSort(data, temp, mid + 1, r); aCxF{>n
else D\13fjjHlu
insertSort(data, mid + 1, r - mid); Oy(fh%k#
!U6q;' )-
for (i = l; i <= mid; i++) { %5g(|Y]
temp = data; S10"yhn(-t
} :%&|5Ytb
for (j = 1; j <= r - mid; j++) { oRDqN]
temp[r - j + 1] = data[j + mid]; CjFnE
} `!BP.-Zv
int a = temp[l]; FX1[ 2\
int b = temp[r]; pCacm@(hG
for (i = l, j = r, k = l; k <= r; k++) { +(Q$GO%
if (a < b) { kZb #k#
data[k] = temp[i++]; asEk3
a = temp; <8J_[ S
} else { CjRU3 (Q
data[k] = temp[j--]; v3p'*81;
b = temp[j]; _'Jz+f.
} }dv$^4 *n
} 6&J7=g%G
} t,bQ@x{zVC
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/** u; ]4ydp
* @param data 9~7s*3zI
* @param l 0|i3#G_~
* @param i pY~/<lzW
*/ 4D'AAr57
private void insertSort(int[] data, int start, int len) { )6!ji]c N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5%r:hO @S
} OrC}WMhd
} *JD-|mK
} If>bE!_BO
} )44c[Z
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堆排序： _O,k0O
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package org.rut.util.algorithm.support; }Fq~!D Ee
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import org.rut.util.algorithm.SortUtil; Xp67l!{v
>TQNrS^$J
/** s~p(59
* @author treeroot ;_~9".'<d
* @since 2006-2-2 >0X_UDAWz
* @version 1.0 [r#m +R"N
*/ `=Z3X(Kc
public class HeapSort implements SortUtil.Sort{ BjSd\Ul
{D$5M/$
/* (non-Javadoc) |tr^ `Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;:PxWm|_
*/ Of}dsav
public void sort(int[] data) { mu*RXLai
MaxHeap h=new MaxHeap(); ljP<WD
h.init(data); 0h-'TJg*sk
for(int i=0;i h.remove(); (=-6'23q)
System.arraycopy(h.queue,1,data,0,data.length); Q"vhl2RX
} I/B*iW^
GBY-WN4sc[
private static class MaxHeap{ 0$g;O5y"i
4JO[yN
void init(int[] data){ XN&cM,
this.queue=new int[data.length+1]; +\R__tx;
for(int i=0;i queue[++size]=data; p![UOI"W
fixUp(size); |[_%zV;p>v
} #E$*PAB
} %,UTFuM`
/lS5B6NU
private int size=0; }'p"q)
J#?`l,
private int[] queue; R wTzS;
<kCOg8<y :
public int get() { HO_!/4hrU
return queue[1]; egmNX't6f5
} ;XIDu6
IZ_?1%q>}
public void remove() { O))YJh"'_
SortUtil.swap(queue,1,size--); #&}j'oD|N
fixDown(1); {ePtZyo0
} vR7S!
file://fixdown ^M)+2@6
private void fixDown(int k) { 7G+E+A5o&
int j; K>vi9,4/ks
while ((j = k << 1) <= size) { $%6.lQ
if (j < size %26amp;%26amp; queue[j] j++; yvWM]A
if (queue[k]>queue[j]) file://不用交换 k`((6
break; Q~f mVWq
SortUtil.swap(queue,j,k); Ge`PVwn
k = j; c6T[2Ig
} LzQOzl@z
} 5AK@e|G$w
private void fixUp(int k) { o1Krp '*
while (k > 1) { ~l8w]R3A
int j = k >> 1; JT! Cb$!
if (queue[j]>queue[k]) ~p`[z~|
break; |ju+{+
SortUtil.swap(queue,j,k); <Uy $b4h
k = j; M%YxhuT0
} vW-o%u*
} n-u HKBq
2~l+2..
} tIT/HG_o
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} J=J!)\m
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SortUtil： jcp6-XM
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package org.rut.util.algorithm; d%K&
VXnWY8\
import org.rut.util.algorithm.support.BubbleSort; !CdF,pd/)m
import org.rut.util.algorithm.support.HeapSort; t2Px?S?
import org.rut.util.algorithm.support.ImprovedMergeSort; TQtHU6
import org.rut.util.algorithm.support.ImprovedQuickSort; %O$=%"D6
import org.rut.util.algorithm.support.InsertSort; t*J?#r
import org.rut.util.algorithm.support.MergeSort; !>#gm7
import org.rut.util.algorithm.support.QuickSort; ceuEsQ}
import org.rut.util.algorithm.support.SelectionSort; h0 Xc=nj
import org.rut.util.algorithm.support.ShellSort; ? q_%
A%cJ5dF8~
/** UX'q64F!
* @author treeroot ,e^~(ITaq
* @since 2006-2-2 Zu*7t<W
* @version 1.0 G{!(2D4!
*/ 4F"%X&$
public class SortUtil { u+O"c
public final static int INSERT = 1; KF6N P
public final static int BUBBLE = 2; ]9-iEQ
public final static int SELECTION = 3; PXG@]$~3
public final static int SHELL = 4; bcUSjG>
public final static int QUICK = 5; EbeSl+iMx_
public final static int IMPROVED_QUICK = 6; DX^8w?t
public final static int MERGE = 7; Xf[;^?]X
public final static int IMPROVED_MERGE = 8; r PTfwhs
public final static int HEAP = 9; %d%FI"!K
P]iJ"d]+X
public static void sort(int[] data) { !"ir}Y%
sort(data, IMPROVED_QUICK); H.;2o(vD
} 9^&B.6!6
private static String[] name={ -Q/wW4dE=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wRZFBf~ :
}; 3 Q~0b+k
lcM
private static Sort[] impl=new Sort[]{ DL#y_;#3_
new InsertSort(), 1*e7NJ/.,
new BubbleSort(), };R2M
new SelectionSort(), Xf{9rZ+
new ShellSort(), OnH3Ss$
new QuickSort(), )gD2wk(
new ImprovedQuickSort(), F|G v
new MergeSort(), 9I:3
new ImprovedMergeSort(), 3mHP=)
new HeapSort() lvRTy|%[
}; j]U~ZAn,K
wv`ar>qVL
public static String toString(int algorithm){ b%KcS&-6
return name[algorithm-1]; KG4zjQf
} vw$b]MO!
nly}ly Q/
public static void sort(int[] data, int algorithm) { 9f/l"
impl[algorithm-1].sort(data); Z&4L///
} w5yX~8UzJ
III:jhh
public static interface Sort { ">M&/}4
public void sort(int[] data); 3ZN\F
} ]9~Il#
P+y XC^ ,
public static void swap(int[] data, int i, int j) { g{ ;OgS3>
int temp = data; ,:#h;4!VRF
data = data[j]; a*t @k*d_
data[j] = temp; r7#.DJnN.
} W56VA>ia
} g<ov` bF