[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; 9Ly]DZ;L
} f &wb
int i1=l; "{Eta
int i2=mid+1; \<6CZ
for(int cur=l;cur<=r;cur++){ _8)*]-
if(i1==mid+1) ,tJ" 5O3-
data[cur]=temp[i2++]; 'D"C4;X
else if(i2>r) 'W,jMju
data[cur]=temp[i1++]; 1&(V
else if(temp[i1] data[cur]=temp[i1++]; ;x1PS
else ~B(4qK1G
data[cur]=temp[i2++]; %zw1}|s#z
} M b1sF
} WPG(@zD
M*HnM(
} f\>M'{cV
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改进后的归并排序: *lw_=MXSK
@w!PaP
package org.rut.util.algorithm.support; hJ#xB6
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import org.rut.util.algorithm.SortUtil; e?lyH
r7,t";?>
/** ^vO+(p
* @author treeroot @qlK6tE`
* @since 2006-2-2 QM#4uI55B
* @version 1.0 K$_0`>[
*/ V0XvJ
public class ImprovedMergeSort implements SortUtil.Sort { 6}Y#=}
V2|aN<Sx<
private static final int THRESHOLD = 10; [ $n_6
<r`2)[7N
/* !|S43i&p
* (non-Javadoc) VsE9H]v
* vVe';|8v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =k0_eX0
*/ ~-J]W-n
public void sort(int[] data) { >R!jB]5
int[] temp=new int[data.length]; hL;(C)(
mergeSort(data,temp,0,data.length-1); j*jo@N|
} Q_X.rUL0w
&_|#.
private void mergeSort(int[] data, int[] temp, int l, int r) { > eIP.,9
int i, j, k; zSja/yq
int mid = (l + r) / 2; #c?j\Y9nz
if (l == r) +sUFv)!4
return; #"\gLr_:m
if ((mid - l) >= THRESHOLD) bNNr]h8y-
mergeSort(data, temp, l, mid); fs%.}^kn
else os={PQRD
insertSort(data, l, mid - l + 1); g($DdKc|g
if ((r - mid) > THRESHOLD) }$Tl ?BRpU
mergeSort(data, temp, mid + 1, r); >P@H#=
else mFaZio0GK
insertSort(data, mid + 1, r - mid); D(RTVef
^y1j.M@q
for (i = l; i <= mid; i++) { /M4{Wc
temp = data; T iiWp!mX
} H>B&|BO_[
for (j = 1; j <= r - mid; j++) { {Um)15K
temp[r - j + 1] = data[j + mid]; wlk4*4dKn
} L(-b@Joh
int a = temp[l]; _JE"{ ;
int b = temp[r]; b@f$nS B
for (i = l, j = r, k = l; k <= r; k++) { '*w00
if (a < b) { k$J zH$
data[k] = temp[i++]; [knN:{ l
a = temp; r^paD2&}
} else { ~%=MpQ3
data[k] = temp[j--]; 5r8<7g:>C
b = temp[j]; q~ZNd3O
} 78# v
} R$TB1w9]
} K&70{r
k!HK 97qA
/** )ZqTwEr@[
* @param data $5<#n@
* @param l $#S&QHyEe
* @param i b+6\JE^Mz
*/ w6GyBo{2O_
private void insertSort(int[] data, int start, int len) { SO(NVJh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _FVcx7l!u
} .=;3d~.]
} ^_u kLzP9
} \6<=$vD
} M .JoHH
sy"^?th}b
堆排序： xt%7@/hiE
L3--r
package org.rut.util.algorithm.support; l6kWQpV
aV?@s4
import org.rut.util.algorithm.SortUtil; +hT:2TXn
)oPLl|=h
/** ruzspS
* @author treeroot 3?7\T#=
* @since 2006-2-2 M)N?qRD
* @version 1.0 }\#Rot>Y
*/ TDNQu_E
public class HeapSort implements SortUtil.Sort{ n3Z5t
5b[jRj6
/* (non-Javadoc) 4/1d&Sg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WP+oFkw>
*/ f Tl<p&b
public void sort(int[] data) { D+z?wuXk
MaxHeap h=new MaxHeap(); qA$*YIlK
h.init(data); m~u5kbHOi=
for(int i=0;i h.remove(); O#k6' LN?
System.arraycopy(h.queue,1,data,0,data.length); ~ZhraSI)G
} r1LViK
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private static class MaxHeap{ M|qteo
H{k^S\K
void init(int[] data){ * %M3PTY\
this.queue=new int[data.length+1]; (?{MEwHG
for(int i=0;i queue[++size]=data; Q[I=T&
fixUp(size); mfo1+owT
} y_IM@)1H~
} jvFTR'R)=
M:3h e
private int size=0; }36QsH8
;u(<h?%e
private int[] queue; M8Z2Pg\0
"WK{ >T
public int get() { o=?C&f{
return queue[1]; Z1Z1@2 T
} (%xwl
Mo @C9Y0
public void remove() { K7W6ZH9;
SortUtil.swap(queue,1,size--); `~;rblo;
fixDown(1); @reeO=
} Jesjtcy<*
file://fixdown [P7N{l=I
private void fixDown(int k) { &2zq%((r
int j; +0q>fp_K(+
while ((j = k << 1) <= size) { e\JojaV
if (j < size %26amp;%26amp; queue[j] j++; Pgus42f%
if (queue[k]>queue[j]) file://不用交换 O1*NzY0Y%-
break; BWuqo
SortUtil.swap(queue,j,k); x{c/$+Z[
k = j; <l9-;2L4
} !\L/[:n
} +g]yA3
private void fixUp(int k) { ugx%_x6
while (k > 1) { fUQ6Z,9
int j = k >> 1; ?Poq2
if (queue[j]>queue[k]) I{:(z3
break; .j>hI="b
SortUtil.swap(queue,j,k); /&{$ pM|?
k = j; )!:Lzi
} lBFMwJU)
} q^L<X)
(tGY%oT"
} xD[Gq%
/iV}HV0
} <xC#@OZ
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SortUtil： e=;AfK
%v7[[U{T
package org.rut.util.algorithm; Zg`Mz _?
?6jkI2w
import org.rut.util.algorithm.support.BubbleSort; K/=_b<
import org.rut.util.algorithm.support.HeapSort; :`2=@.
import org.rut.util.algorithm.support.ImprovedMergeSort; X>. NFB
import org.rut.util.algorithm.support.ImprovedQuickSort; ;cz|ss=
import org.rut.util.algorithm.support.InsertSort; B7<Kc
import org.rut.util.algorithm.support.MergeSort; Ch%m
import org.rut.util.algorithm.support.QuickSort; -O!Zxg5x
import org.rut.util.algorithm.support.SelectionSort; Bk\Gj`"7
import org.rut.util.algorithm.support.ShellSort; adi[-L#
-7&Gi +]
/** D<X.\})Md
* @author treeroot D"ehWLj
* @since 2006-2-2 Xy &uZ
* @version 1.0 V-r3-b
*/ <u:WlaS
public class SortUtil { z)=+ F]
public final static int INSERT = 1; XNb ZNaAd
public final static int BUBBLE = 2; F.=Bnw/-
public final static int SELECTION = 3; RxN,^!OV
public final static int SHELL = 4; SdwS= (e6
public final static int QUICK = 5; %8M)2?E
public final static int IMPROVED_QUICK = 6; Io|Aj
public final static int MERGE = 7; 0{PzUIM,W
public final static int IMPROVED_MERGE = 8; n[,w f9
public final static int HEAP = 9; z.VyRBi0
>ap1"n9k
public static void sort(int[] data) { J@ktyd(P
sort(data, IMPROVED_QUICK); Ze3X$%kWi
} WJ9cZL
private static String[] name={ ^3FE\V/=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (nab
}; [wB9s{CX
"y<?Q}1
private static Sort[] impl=new Sort[]{ T,OwM\`.X{
new InsertSort(), rf%7b8[v
new BubbleSort(), \VFHHi:I
new SelectionSort(), OOz[-j>'Y+
new ShellSort(), W$Yc'E ;
new QuickSort(), Pv+5K*"7Cg
new ImprovedQuickSort(), V@QK
new MergeSort(), w7n373y%
new ImprovedMergeSort(), y tf b$;|
new HeapSort() \yGsr Bl
}; {Pu\?Cq
V)i5=bHC
public static String toString(int algorithm){ O8W7<Wc|z
return name[algorithm-1]; 7 +@qB]Bi<
} =}:)y0L
BMIyskl=i
public static void sort(int[] data, int algorithm) { @IP)S[^' t
impl[algorithm-1].sort(data); !!nuAQ"E[
} ) (Tom9^
H<G4O02i_
public static interface Sort { 3TZ*RPmFRm
public void sort(int[] data); kY&h~Q
} =@5x"MOz
Iu35#j
public static void swap(int[] data, int i, int j) { E|$Oha[
int temp = data; )CS.F=
data = data[j]; `K >?ju"
data[j] = temp; b]JI@=s?
} J!*/a'Cv
} 'XUKN/.