[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; omU)hFvyS
} :9< r(22
int i1=l; , X+(wp
int i2=mid+1; 833t0Ml1A/
for(int cur=l;cur<=r;cur++){ |Y8o+O_`
if(i1==mid+1) Fi}rv[`XY[
data[cur]=temp[i2++]; HBYpjxh
else if(i2>r) f*@:{2I.v
data[cur]=temp[i1++]; "+Yn;9
else if(temp[i1] data[cur]=temp[i1++]; 9`VF [* 9
else zIm!8a
data[cur]=temp[i2++]; _ o3}Ly}
} u 9TlXn
} ZOsn,nF
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} )}lV41u
}J lW\#
改进后的归并排序: 1Ac1CsK*
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package org.rut.util.algorithm.support; }# ^PbM
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import org.rut.util.algorithm.SortUtil; )o,0aGo>Of
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/** cW%O-
* @author treeroot (`*wiu+i
* @since 2006-2-2 }e@-[RJ!
* @version 1.0 2geC3v% 0o
*/ | Ylk`<
public class ImprovedMergeSort implements SortUtil.Sort { 9^olAfX`dB
!X_~|5.
private static final int THRESHOLD = 10; S!cXc/H-R
&d;$k
/* 5Yr$dNe
* (non-Javadoc) {P+[CO
* (o\~2e:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u{z{3fW_
*/ %q^]./3p
public void sort(int[] data) { x=)$sD-3
int[] temp=new int[data.length]; -/?<@*n
mergeSort(data,temp,0,data.length-1); 9m!fW|4
} )P])0Y-
b5R*]
private void mergeSort(int[] data, int[] temp, int l, int r) { EUqG"h5#A{
int i, j, k; kRPg^Fw"Vw
int mid = (l + r) / 2; ]42l:at
if (l == r) E(#2/E6
return; .IU+4ENSy4
if ((mid - l) >= THRESHOLD) 4r&~=up]
mergeSort(data, temp, l, mid); 4N&}hOM'S
else GAKJc\o
insertSort(data, l, mid - l + 1); UJ:B:hh''
if ((r - mid) > THRESHOLD) f'S"F
mergeSort(data, temp, mid + 1, r); *Y~64FM
else o5uwa{v
insertSort(data, mid + 1, r - mid); AtI,&S#{
d\M !o*U
for (i = l; i <= mid; i++) { ":ycyN@g
temp = data; (Bz(KyD[
} aT#|mk=\
for (j = 1; j <= r - mid; j++) { S{6u\Vy
temp[r - j + 1] = data[j + mid]; .MlE1n'
} +fN0>@s
int a = temp[l]; ^da-R;o]
int b = temp[r]; *VB*/^6A
for (i = l, j = r, k = l; k <= r; k++) { \BW(c)Q
if (a < b) { b8&9pLl
data[k] = temp[i++]; g:yK/1@Hk}
a = temp; p(Mv^ea
} else { 8z"Yo7no
data[k] = temp[j--]; hkG<I';M?M
b = temp[j]; ??PpHBJ')
} rH,N.H#]
} b%(0AL
} 1Jt%I'C?
Nsq%b?#
/** &n|gPp77$
* @param data ;<\*(rUe
* @param l "'Ik{wGc
* @param i gK /K Z8
*/ 5> UgBA
private void insertSort(int[] data, int start, int len) { .kVga+la?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Dts:$PlCk
} eR CGr?e4
} 43Q&<r$[T
} M%/D:0
} ]+AI:
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堆排序： 15COwc*k
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package org.rut.util.algorithm.support; i!NGX
n2E2V<#
import org.rut.util.algorithm.SortUtil; s=:n<`Z2
+]#>6/2q
/** (&S v$L@
* @author treeroot x{m)I<.:
* @since 2006-2-2 39"'Fz?1
* @version 1.0 4{|lzo'&
*/ _R]h]<TQ
public class HeapSort implements SortUtil.Sort{ tc[PJH&P
f: Rh9
/* (non-Javadoc) U+KbvkX wj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #r1x0s40D
*/ Xe5J
public void sort(int[] data) { {PU[MHZF
MaxHeap h=new MaxHeap(); gVGq
h.init(data); 1g;3MSn~
for(int i=0;i h.remove(); Th8xh=F[
System.arraycopy(h.queue,1,data,0,data.length); Y, P-@(
} C oaqi`v4T
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private static class MaxHeap{ o` e~1
_?{2{^v
void init(int[] data){ kz#DBh!&
this.queue=new int[data.length+1]; L8V'mUyD
for(int i=0;i queue[++size]=data; 3yTBkFI!
fixUp(size); (nBsf1l
} O @w=
} 9`xq3EL2T
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private int size=0; 6)W9/V-W
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private int[] queue; &?~> I[^~
a@%FwfIu
public int get() { 4F'@yi^Gt
return queue[1]; =%a.C(0&G
} ;G w5gK^
D,NjDIG8
public void remove() { pD){K
SortUtil.swap(queue,1,size--); !XK p_v
fixDown(1); >9|Q,/b0
} oL<^m?-u
file://fixdown W7.]V)$wM
private void fixDown(int k) { +ux,cx.U"
int j; a+]@$8+
while ((j = k << 1) <= size) { d@C93VYp
if (j < size %26amp;%26amp; queue[j] j++; c^m}ep\F5L
if (queue[k]>queue[j]) file://不用交换 ]+J]}C]\d
break; r> NgJf,
SortUtil.swap(queue,j,k); C<{k[!N%zm
k = j; Jr#ptf"Wu
} |`,%%p|T%
} (Y-7B
private void fixUp(int k) { rl!c\
while (k > 1) { P}cGWfj
int j = k >> 1; {uq
if (queue[j]>queue[k]) RFqbwPX
break; ni9/7
SortUtil.swap(queue,j,k); !sUo+Y
k = j; =T9QmEBm
} ,*Sj7qb#
} ,b2Cl[
Dk/;`sXV
} ao Y"uT+
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} R\)pW9)
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SortUtil： )fv0H&g
![ Fb~Egc
package org.rut.util.algorithm; F?TAyD*
$:SHZe
import org.rut.util.algorithm.support.BubbleSort; .#P'NF(5#
import org.rut.util.algorithm.support.HeapSort; L= hPu#&/
import org.rut.util.algorithm.support.ImprovedMergeSort; &Zd!|u
import org.rut.util.algorithm.support.ImprovedQuickSort; UP^{'eh
import org.rut.util.algorithm.support.InsertSort; e5C560
import org.rut.util.algorithm.support.MergeSort; B_nim[72
import org.rut.util.algorithm.support.QuickSort; Ee d2`~
import org.rut.util.algorithm.support.SelectionSort; c:M~!CXO
import org.rut.util.algorithm.support.ShellSort; R Mrh@9g
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/** ~[t%g9
* @author treeroot #D&eov?
* @since 2006-2-2 wm!Y5
* @version 1.0 l>Z"y\l=
*/ {|bf`
public class SortUtil { {IJ,y27
public final static int INSERT = 1; ):31!IC
public final static int BUBBLE = 2; C65( m
public final static int SELECTION = 3; ]:8:|*w
public final static int SHELL = 4; ?V3e;n
public final static int QUICK = 5; 9])dLL0
public final static int IMPROVED_QUICK = 6; { owK~
public final static int MERGE = 7; Z~[c65Nlu
public final static int IMPROVED_MERGE = 8; qlNK }
public final static int HEAP = 9; 7X*$Fu<
?I6!m~
public static void sort(int[] data) { >$j?2,Za(V
sort(data, IMPROVED_QUICK); N^jQ\|A<
} _?]bd-E
private static String[] name={ &Rdg07e;>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gi#bU
}; h(l4\)
>|'u:`A
private static Sort[] impl=new Sort[]{ ;shhgz$
new InsertSort(), b*&AIiT
new BubbleSort(), JvX]^t/}
new SelectionSort(), SfLZVB
new ShellSort(), Q}C)az
new QuickSort(), F !g>fIg
new ImprovedQuickSort(), )O*\}6:S
new MergeSort(), agp`<1h9
new ImprovedMergeSort(), la+RK
new HeapSort() 589hfET
}; I7,5ID4pn
%38HGjS
public static String toString(int algorithm){ 0N>NX?r
return name[algorithm-1]; k+b!Lw!L
} j1D 1tn
/vO8s??
public static void sort(int[] data, int algorithm) { !Lkk1zo
impl[algorithm-1].sort(data); c_wvuKa
} 7vZtEwC)n
[}:;B$,
public static interface Sort { HueGARS
public void sort(int[] data); AH-B/c5
} d^h`gu~3
W'lejOiw
public static void swap(int[] data, int i, int j) { &GYnGrw?@
int temp = data; &Z'3n9zl
data = data[j]; bji5X')~#
data[j] = temp; @%iZT4`Ejf
} u|(;SY
} Pa)'xfQ$Y6