[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; MDk*j,5V
} O -G1})$
int i1=l; D9~}5
int i2=mid+1; J"-_{)0lD
for(int cur=l;cur<=r;cur++){ /I`3dWL
if(i1==mid+1) [*<.?9n)or
data[cur]=temp[i2++]; B={/nC}G~
else if(i2>r) o,CBA;{P
data[cur]=temp[i1++]; [FGgkd}
else if(temp[i1] data[cur]=temp[i1++]; ?cJY B)
else 'Q5&5UrBr
data[cur]=temp[i2++]; lr WLN
} J{d(1gSZ
} ~;[&K%n
lzEb5mg
} O}QFq14<+
hyfR9~
改进后的归并排序: E/ijvuO
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package org.rut.util.algorithm.support; `)$`-Pw*
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import org.rut.util.algorithm.SortUtil; :j@8L.<U
atyu/+U'}
/** qIh #~
* @author treeroot $Z ]z
* @since 2006-2-2 &1_U1
* @version 1.0 [![ G7H%f
*/ X8b|]Nr
public class ImprovedMergeSort implements SortUtil.Sort { <W*xshn
x`2| }AP(
private static final int THRESHOLD = 10; 1* ^'\W.
dAL3.%
/* /Wu|)tx
* (non-Javadoc) \3aTaT?..
* KXf<$\+zO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^/dS>_gtHv
*/ R"3 M[^
public void sort(int[] data) { mibpG9+d
int[] temp=new int[data.length]; b{M}5~e=B
mergeSort(data,temp,0,data.length-1); #f*g]p{
} rA1qSG~c
,gMy@
private void mergeSort(int[] data, int[] temp, int l, int r) { #r<?v
int i, j, k; _6MdF<Xb/
int mid = (l + r) / 2; D. Kqc
if (l == r) DI1(`y
return; d"ZU y!a
if ((mid - l) >= THRESHOLD) *5OCqU+g
mergeSort(data, temp, l, mid); zE|Wn3_sd
else R?pRxY
insertSort(data, l, mid - l + 1); !^y y0`k6
if ((r - mid) > THRESHOLD) jQ=~g-y
mergeSort(data, temp, mid + 1, r); +7U
else nX^1$')gp
insertSort(data, mid + 1, r - mid); [h&BAR/ 2
c*;7yh&%
for (i = l; i <= mid; i++) { %}&(h/= e
temp = data; lw[e*q{s.
} R-rCh.
for (j = 1; j <= r - mid; j++) { Wto;bd
temp[r - j + 1] = data[j + mid]; C5@V/vA
} (K :]7
int a = temp[l]; = 96P7#%
int b = temp[r]; !MVj=(
for (i = l, j = r, k = l; k <= r; k++) { p!zJ;rh)
if (a < b) { c|AtBgvf
data[k] = temp[i++]; TWd;EnNM
a = temp; zl%>`k!>
} else { Tycq1i^
data[k] = temp[j--]; 1J}8sG2`
b = temp[j]; * R d#{Io7
} (GcT(~Gq)D
} wX,F`e3"/
} 2i7e#
>cN~U3
/** -*a?<ES`
* @param data MCc$TttaVz
* @param l @5VV|Wt=
* @param i "D][e'
*/ -#s [F S
private void insertSort(int[] data, int start, int len) { Hkd^-=]]no
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PftxqJz
} {9LWUCpsf
} Bs;|D
} PdeBDFWD
} bb-qO#E
g(ogXA1
堆排序： v [njdP
e]Fp=*#
package org.rut.util.algorithm.support; Sr_VL:Gg
dy>!KO
import org.rut.util.algorithm.SortUtil; bh p5<N
IMGP'g
/** Anm=*;*M`
* @author treeroot %|"g/2sF[G
* @since 2006-2-2 k\`S lb1
* @version 1.0 :6{`~=
*/ b)#Oc,
public class HeapSort implements SortUtil.Sort{ 51BlM%
[I;^^#'P
/* (non-Javadoc) G?c-79]U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gI]GUD-
*/ s{bdl[7
public void sort(int[] data) { od' /%
MaxHeap h=new MaxHeap(); LiQgR 6j
h.init(data); 3AcD,,M>>
for(int i=0;i h.remove(); Jc6R{C
System.arraycopy(h.queue,1,data,0,data.length); BB$oq'
} 0k,-;j,
-O!/Jv"{,[
private static class MaxHeap{ #/2$+x
_+l1b"^s1
void init(int[] data){ _~u2: yl(
this.queue=new int[data.length+1]; 5ExDB6Bx@y
for(int i=0;i queue[++size]=data; {'En\e
fixUp(size); A]0:8@k5
} b</9Ai=
} Y?J"wdWJNB
yp.[HMRD
private int size=0; 3*UR3!Z9 *
Kf tgOG f
private int[] queue; 1 rs&74-
u"1rF^j6k
public int get() { =3ioQZ^Vz
return queue[1]; #|GSQJ$F)`
} RwI[R)k
2dp>Z",
public void remove() { %UUH"
SortUtil.swap(queue,1,size--); d[p;T\?"
fixDown(1); fA/m1bYxg
} j]|U
file://fixdown zaTb~#c_
private void fixDown(int k) { GeszgtK{T
int j; NA3\
while ((j = k << 1) <= size) { (+uj1z^
if (j < size %26amp;%26amp; queue[j] j++; c~QS9)=E
if (queue[k]>queue[j]) file://不用交换 >_OYhgs1w
break; qyC=(v
SortUtil.swap(queue,j,k); [/s&K{+c
k = j; -=s(l.?Hm5
} n1 6 `y}
} _Z5Mw+=19
private void fixUp(int k) { Eu"_MgD
while (k > 1) { r.7$&BCng
int j = k >> 1; =UyLk-P w
if (queue[j]>queue[k]) 4pw6bK,s2\
break; rE@T79"
SortUtil.swap(queue,j,k); F1yqxWHeo
k = j; XuFYYx~ ^3
} lgk.CC
} .:F%_dS D
%lGl,me H
} ZpQ)IHA.
)AvN\sC
} %iQD /iT5
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SortUtil： ?82xdpg
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package org.rut.util.algorithm; ~x1$h#Cx'
Hquc o
import org.rut.util.algorithm.support.BubbleSort; I=`U7Bis"
import org.rut.util.algorithm.support.HeapSort; e w$B)W
import org.rut.util.algorithm.support.ImprovedMergeSort; ]>5/PD,wWy
import org.rut.util.algorithm.support.ImprovedQuickSort; o6.^*%kM'
import org.rut.util.algorithm.support.InsertSort; P/W XaE4
import org.rut.util.algorithm.support.MergeSort; ?67Y-\}
import org.rut.util.algorithm.support.QuickSort; m;GCc8
import org.rut.util.algorithm.support.SelectionSort; N5lDS
import org.rut.util.algorithm.support.ShellSort; *nkoPVpC
-lY6|79bF
/** SE1=>S%p
* @author treeroot KW pVw!
* @since 2006-2-2 Q+{xZ'o"Z
* @version 1.0 -cAo@}v
*/ g}1B;zGf
public class SortUtil { vApIHI?-
public final static int INSERT = 1; L [pBB
public final static int BUBBLE = 2; iu=7O
public final static int SELECTION = 3; 8;RUf~q?
public final static int SHELL = 4; S%Uutj\/W
public final static int QUICK = 5; qN9(S:_Px
public final static int IMPROVED_QUICK = 6; U:0mp"
public final static int MERGE = 7; \ C+~m
public final static int IMPROVED_MERGE = 8; Z>k#n'm^z
public final static int HEAP = 9; ZbW17@b
bN1|q|9
public static void sort(int[] data) { -b9\=U[
sort(data, IMPROVED_QUICK); 84& $^lNV
} spH7 /5}
private static String[] name={ On9A U:\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \/r}]Vz
}; 3Ei#q+7
|6sp/38#p
private static Sort[] impl=new Sort[]{ X!TpYUZ'
new InsertSort(), /L g)i\R;
new BubbleSort(), 8Z8gRcv{p
new SelectionSort(), 24 'J
new ShellSort(), @e.C"@G
new QuickSort(), _YhES-Ff
new ImprovedQuickSort(), ?Jm^<
new MergeSort(), $f <(NM6?
new ImprovedMergeSort(), 3)<yod=
new HeapSort() 'x#~'v*
}; BO?%'\
NZ:,ph
public static String toString(int algorithm){ ~d.Y&b
return name[algorithm-1]; {BN#h[#B{
} Tv,[DI +
L\J;J%fz.
public static void sort(int[] data, int algorithm) { O m|_{
impl[algorithm-1].sort(data); z#wkiCRYm
} gh]cXuph
AofKw
public static interface Sort { IVY]EkEG~
public void sort(int[] data); Di6?[(8
} A:%`wX}
6xx ?A>:
public static void swap(int[] data, int i, int j) { MAR'y8I
int temp = data; <dtGK~_
data = data[j]; 9s q
data[j] = temp; _1\v
} JGrWHIsNV
} iOghb*aW