[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; &=.SbS
} ?PSJQ3BC|
int i1=l; dq4t@:\o0
int i2=mid+1; p=T6Ix'_2e
for(int cur=l;cur<=r;cur++){ p|`[8uY?
if(i1==mid+1) Ib}~Q@?2
data[cur]=temp[i2++]; .-mlV ^
else if(i2>r) ETQL,t9m
data[cur]=temp[i1++]; xXQW|#X\
else if(temp[i1] data[cur]=temp[i1++]; D,,$
else ?y|8bw<
data[cur]=temp[i2++]; 4_KRH1
} d%lwg~@&|5
} gk^`-`P
'-2|GX_o
} yyv<MSU8
5M= S7B3=
改进后的归并排序: 8eDKN9kq
Y![//tg
package org.rut.util.algorithm.support; E/Adi^
m^%Xl@V:c-
import org.rut.util.algorithm.SortUtil; !4"<:tSO
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/** rXF=/
* @author treeroot QG]*v=Z
* @since 2006-2-2 Rap =&
* @version 1.0 zz[[9Am!
*/ _n12Wx{
public class ImprovedMergeSort implements SortUtil.Sort { 2O+fjs
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private static final int THRESHOLD = 10; FZ@8&T
[h@MA|
/* f'&
* (non-Javadoc) |n %<p
* &Tn7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -z?O^:e#x
*/ W}.p,d
public void sort(int[] data) { |X0Ys8f
int[] temp=new int[data.length]; A,f%0 eQR
mergeSort(data,temp,0,data.length-1); QMBV"E_aY
} &4V"FHy2
.ta*M{t
private void mergeSort(int[] data, int[] temp, int l, int r) { F/chE c V
int i, j, k; OJ4-p&1
int mid = (l + r) / 2; t.]c44RY
if (l == r) qkh.?~
return; +{/*P5
if ((mid - l) >= THRESHOLD) <#5`%sa '
mergeSort(data, temp, l, mid); -nKBSls
else a&~]77)
insertSort(data, l, mid - l + 1); & wG3RR|
if ((r - mid) > THRESHOLD) "Qxn}$6-
mergeSort(data, temp, mid + 1, r); ;WpPdR2
else {1j[RE
insertSort(data, mid + 1, r - mid); *S>,5R0k
;3k6_ub
for (i = l; i <= mid; i++) { )bPF@'rF2
temp = data; #$(wfb9
} DozC>
for (j = 1; j <= r - mid; j++) { TAn.5 wH9t
temp[r - j + 1] = data[j + mid]; dk9nhS+faJ
} mca9 +v
int a = temp[l]; ALY% h!L
int b = temp[r]; 3kBpH7h4
for (i = l, j = r, k = l; k <= r; k++) { /@\3#2;
if (a < b) { \ml6B6
data[k] = temp[i++]; B(%bBhs
a = temp; |uE_aFQs
} else { pd{;`EW|
data[k] = temp[j--]; I#tEDeF2
b = temp[j]; =7Y gES
} 8E!I9z
} ]m(5>h#
} AH(O"v`
Eh)VU_D
/** !jDqRXi(
* @param data ~Zd n#z\
* @param l I({ 7a i
* @param i &sx|sLw)
*/ |KFWW
private void insertSort(int[] data, int start, int len) { Pk; 9\0k7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OQh36BM
} r}~l(
} OQA3~\Vu
} VM3H&$d(h
} }m<)$.x|P
F*d{<
堆排序： 6zLz<p?
EtH)E)
package org.rut.util.algorithm.support; 'Sc3~lm(dH
GSW{h[Op
import org.rut.util.algorithm.SortUtil; '}5}wCLA
~^"cq S(
/** w I@ lO\
* @author treeroot [21tT/
* @since 2006-2-2 G<-)Kx
* @version 1.0 K(plzQ3
*/ f41!+W=
public class HeapSort implements SortUtil.Sort{ ]~(Ipz2NP
`4&\ %9
/* (non-Javadoc) *qG=p`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T[XI
*/ Y#6@0Nn[G
public void sort(int[] data) { 3@}HdLmN|
MaxHeap h=new MaxHeap(); BsB}noN}
h.init(data); F,O+axO ja
for(int i=0;i h.remove(); S&]:=He
System.arraycopy(h.queue,1,data,0,data.length); 'EREut,>'
} "eQ96^'J
5H 1(C#|
private static class MaxHeap{ jVRd[
W{;!JI7;z
void init(int[] data){ TL7-uH
this.queue=new int[data.length+1]; u(ZS sftat
for(int i=0;i queue[++size]=data; ~N'KIP[W
fixUp(size); SsznV}{^
} H[,.nH_>+
} V6$v@Zq
'KQuz)-
private int size=0; ]NAPvw#p
2z[Pw0#V
private int[] queue; t41cl
=,@SZsM*B
public int get() { J*U(f{Q(
return queue[1]; 74Q?%X
} g>im2AD+e
^1cqx]>E
public void remove() { Y5MHd>m
SortUtil.swap(queue,1,size--); m'qMcCE
fixDown(1); "W+4`A(/l
} \R-u+ci$ZY
file://fixdown NM8F
private void fixDown(int k) { Z@ws,f^e
int j; v8%]^` '
while ((j = k << 1) <= size) { i^IvT
if (j < size %26amp;%26amp; queue[j] j++; s\jLIrG8
if (queue[k]>queue[j]) file://不用交换 6:EO
break; 7GP?;P
SortUtil.swap(queue,j,k); %?wuKZLnc
k = j; N{9<Tf*
} IWT##']G
} ,OasT!Sr
private void fixUp(int k) { sG VC+!E
while (k > 1) { MJg^ QVM
int j = k >> 1; E>g'!
if (queue[j]>queue[k]) zWY6D4
break; @W @L%<
SortUtil.swap(queue,j,k); g{J3Ba
k = j; B)-S@.u
} T]vD ,I+
} '[-/Xa['
_>`0!mG
} yQx>h6
;:!LAe
} 2hpx%H
u\E.H5u27
SortUtil： f(_qcgXp
1Xs!ew)>
package org.rut.util.algorithm; U50X`J
df:,5@CJ8
import org.rut.util.algorithm.support.BubbleSort; FFQF0.@EBi
import org.rut.util.algorithm.support.HeapSort; 2)8lJXM$L
import org.rut.util.algorithm.support.ImprovedMergeSort; k{bba=<
import org.rut.util.algorithm.support.ImprovedQuickSort; q/3}8BJ
import org.rut.util.algorithm.support.InsertSort; ^Ue.9#9T&g
import org.rut.util.algorithm.support.MergeSort; Ci*5E$+\
import org.rut.util.algorithm.support.QuickSort; ~*[}O)7#
import org.rut.util.algorithm.support.SelectionSort; NPc%}V&C(u
import org.rut.util.algorithm.support.ShellSort; pj )I4C)
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/** w}1)am&pD
* @author treeroot Sph+kiy|
* @since 2006-2-2 /d=$,q1
* @version 1.0 3|?fGT;P
*/ sS|zz,y
public class SortUtil { 8zGzn%^
public final static int INSERT = 1; 82=][9d #
public final static int BUBBLE = 2; 1Jd:%+T
public final static int SELECTION = 3; 08` @u4
public final static int SHELL = 4; M)xK+f2_[
public final static int QUICK = 5; )b7mzDp(
public final static int IMPROVED_QUICK = 6; dG rA18
public final static int MERGE = 7; ='JX_U`A^F
public final static int IMPROVED_MERGE = 8; *= 71/&B
public final static int HEAP = 9; MJC Yi<D
+ mcN6/
public static void sort(int[] data) { 2 g8PU$T
sort(data, IMPROVED_QUICK); oD8-I^
} 5cADC`q
private static String[] name={ %x *f{(8h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @3@%9E
}; ;F+%{LgKl
.Sn1YAhE
private static Sort[] impl=new Sort[]{ f65Sr"qB3
new InsertSort(), VO`A
new BubbleSort(), ))F.|w
new SelectionSort(), O>Sbb2q?"
new ShellSort(), QCo^#-
new QuickSort(), gvJJ.IX]+
new ImprovedQuickSort(), 6:!fyia
new MergeSort(), ZJpI]^9|
new ImprovedMergeSort(), F,zJdJ
new HeapSort() |<V{$),k
}; 9mnON~j5
|l|]Tw
public static String toString(int algorithm){ w-"&;klV
return name[algorithm-1]; eXd(R>Mx
} q-Qws0\v.
xr/k.Fz
public static void sort(int[] data, int algorithm) { TGNeEYr
impl[algorithm-1].sort(data); L$xRn/\
} op*+fJHD
}';&0p2Z
public static interface Sort { ^\?9W
public void sort(int[] data); -^5R51
} >guQY I@4,
ah92<'ix
public static void swap(int[] data, int i, int j) { yU.0'r5uR
int temp = data; F"=MU8
data = data[j]; ,54<U~Lg:
data[j] = temp; Wg%-m%7O
} t>fB@xHBB
} {<2ZbN?