[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; lIz"mk
} pno]Bld'z
int i1=l; jU/0a=h9
int i2=mid+1; Zj%l (OVq
for(int cur=l;cur<=r;cur++){ r!'\$(m E
if(i1==mid+1) WOiw 0
data[cur]=temp[i2++]; $3k5hDA0e
else if(i2>r) "*a^_tsT?i
data[cur]=temp[i1++]; /2 ')u|
else if(temp[i1] data[cur]=temp[i1++]; gq!|0
else 1d,;e:=j
data[cur]=temp[i2++]; hT]\*},
} X0O@,
} zQ&`|kS
a~jM^b;VN
} G<U MZg
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改进后的归并排序: 1)U%p
n]jZ2{g+
package org.rut.util.algorithm.support; >d%;+2
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import org.rut.util.algorithm.SortUtil; ;b-Y$<
^^1rjh1I
/** QE1DTU
* @author treeroot #**vIwX-Q
* @since 2006-2-2 2Ck'A0d
* @version 1.0 bd_&=VLTC
*/ 0j@gC0xu)|
public class ImprovedMergeSort implements SortUtil.Sort { <KlG#7M>
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private static final int THRESHOLD = 10; CvS}U%
Z(k7&^d
/* )OpB\k
* (non-Javadoc) d ]R&mp|'
* wGr5V!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !*5vXN
*/ &==X.2XW
public void sort(int[] data) { hE@s~~JYd
int[] temp=new int[data.length]; $)8b)Tb
mergeSort(data,temp,0,data.length-1); gTa6%GM>
} =^#^Mq)
6qp2C]9=
private void mergeSort(int[] data, int[] temp, int l, int r) { VPBlU
int i, j, k; qVjl8%)
int mid = (l + r) / 2; uY{V^c#mv
if (l == r) ziPE(B
return; J0K25w
if ((mid - l) >= THRESHOLD) v0v%+F#>@
mergeSort(data, temp, l, mid); H=,0p
else w_4/::K*
insertSort(data, l, mid - l + 1); g:V8"'
if ((r - mid) > THRESHOLD) ]rU$0)VN
mergeSort(data, temp, mid + 1, r); [Vzp D 4
else tn>z%6;&Z
insertSort(data, mid + 1, r - mid); !(QDhnx}9c
#[=%+*Q
for (i = l; i <= mid; i++) { D; i%J
temp = data; h' #C$i
} FyY<Vx'yQ
for (j = 1; j <= r - mid; j++) { M`{~AIqd(
temp[r - j + 1] = data[j + mid]; m$6u K0
} F6,[!.wl
int a = temp[l]; ) bRj'*
int b = temp[r]; )4u6{-|A
for (i = l, j = r, k = l; k <= r; k++) { AT$eTZ]M
if (a < b) { Cp{ j+Ia
data[k] = temp[i++]; Ky(=O1Ufu
a = temp; 4K{<R!2I
} else { 1HPYW7jk@"
data[k] = temp[j--]; <e)5$Aj
b = temp[j]; <?h`
} yCC.j%@
} >AFX}N#
} :56f
Ut|G.%1Vd%
/** -SO`wL NV
* @param data ]m&cVy&
* @param l k?[|8H~2C
* @param i "eRf3Q7w:
*/ *|97 g*G(
private void insertSort(int[] data, int start, int len) { fjGYp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3"9'MDKH
} 9'tOF
} =gG_ %]``R
} ;G 27S<Q
} b3$aPwv
[ QHSCF5
堆排序： kta`[%KmIZ
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package org.rut.util.algorithm.support; I"AgRa
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import org.rut.util.algorithm.SortUtil; 0qND2_
k#*tf:R
/** q].n1w[
* @author treeroot &tKr ?l
* @since 2006-2-2 WcE{1&PXx
* @version 1.0 ?<7o\Xk#{
*/ KB3zQJY
public class HeapSort implements SortUtil.Sort{ 0H<&*U_V
%(72+B70R
/* (non-Javadoc) 1lAx"VL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "'M>%m u
*/ /d<"{\o
public void sort(int[] data) { r@j$$Pk`
MaxHeap h=new MaxHeap(); d`M]>EDXp
h.init(data); $]H^?
for(int i=0;i h.remove(); Hjho!np
System.arraycopy(h.queue,1,data,0,data.length); y}TiN!M
} {i}z|'!
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private static class MaxHeap{ \=kre+g
c(:qid
void init(int[] data){ +1`Zu$|
this.queue=new int[data.length+1]; @%8Xa7+
for(int i=0;i queue[++size]=data; o'9K8q\1
fixUp(size); aN\psg
} yW3X<
} X[F<sxw
XI>|"*-l
private int size=0; aqa%B
T!GX^nn*O
private int[] queue; 1O<Gg<<,e
f{]eb1
public int get() { 0H|U9
return queue[1]; ve#*qz Y
} lP9XqQ(
iymOq9
public void remove() { JjH#,@'.
SortUtil.swap(queue,1,size--); {u/G!{N$
fixDown(1); Z @:5vo
} u!iBAr5
file://fixdown M!KHBr
private void fixDown(int k) { 8UAbTqB-
int j; ulcm
while ((j = k << 1) <= size) { X<6Ro es2
if (j < size %26amp;%26amp; queue[j] j++; co <ATx
if (queue[k]>queue[j]) file://不用交换 OI=LuWGQE1
break; 7.-g=Rcz
SortUtil.swap(queue,j,k); ZjlFr(
k = j; cy0 %tsB|
} \ow3_^Bk
} u9d4zR
private void fixUp(int k) { bo;;\>k
while (k > 1) { Cd>GY
int j = k >> 1; x2 s%qZ#
if (queue[j]>queue[k]) 1-HL#y*7$
break; }]8n3&*
SortUtil.swap(queue,j,k); 2!6+>nvO
k = j; 0zSRk]i.f
} )kMA_\$,
} gnAM}
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} *6Ojv- G|5
bp'qrcFuiL
} (WW*yv.J
[# X:!xcl
SortUtil： XDtr{r6z
d+ LEi^
package org.rut.util.algorithm; 3' HtT
.d\<}\zZ7J
import org.rut.util.algorithm.support.BubbleSort; GrwoV~
import org.rut.util.algorithm.support.HeapSort; ul{u^ j
import org.rut.util.algorithm.support.ImprovedMergeSort; 6]GEn=t
import org.rut.util.algorithm.support.ImprovedQuickSort; r6B\yH2
import org.rut.util.algorithm.support.InsertSort; fB\+.eN
import org.rut.util.algorithm.support.MergeSort; AnB]f~Yjl
import org.rut.util.algorithm.support.QuickSort; Qv3g 4iJ
import org.rut.util.algorithm.support.SelectionSort; R.(cGZS
import org.rut.util.algorithm.support.ShellSort; *b{C`[ =V
q>$[<TsE&}
/** I'23$IzPA
* @author treeroot n@3(bl5{
* @since 2006-2-2 XIv{jzgF
* @version 1.0 XM0;cF
*/ n?@3+wG
public class SortUtil { c"vF i~Db
public final static int INSERT = 1; 3f 1@<7*
public final static int BUBBLE = 2; &VY(W{\eY
public final static int SELECTION = 3; (-V=&F_
public final static int SHELL = 4; oiG@_YtR
public final static int QUICK = 5; ~:65e 8K
public final static int IMPROVED_QUICK = 6; ?J;*
public final static int MERGE = 7; oD5VE
public final static int IMPROVED_MERGE = 8; os\"(*dix
public final static int HEAP = 9; c0lVt)pr/
c|f)k:Q
public static void sort(int[] data) { D$sG1*@s-
sort(data, IMPROVED_QUICK); k+(UpO=/*
} R]oi&"H@r)
private static String[] name={ 9.bMA<X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (h"Yw
}; v-*CE[
+y+-~;5iv
private static Sort[] impl=new Sort[]{ {gSR49!Q
new InsertSort(), IIN"'7Z^R
new BubbleSort(), M6ol/.G[
new SelectionSort(), *`}4]OGv.
new ShellSort(), {{FA"NW
new QuickSort(), 5kwDmJy
new ImprovedQuickSort(), S-FoyID\H
new MergeSort(), won(HK\1p
new ImprovedMergeSort(), Ov vM)?^#
new HeapSort() !PCw-&
}; =~Ac=j!q
?K<m.+4b*y
public static String toString(int algorithm){ tDuQ+|~M
return name[algorithm-1]; P,S$qD*4
} =y3gnb6
w|6;Pf~1y)
public static void sort(int[] data, int algorithm) { jGB2`^&d
impl[algorithm-1].sort(data); 9]Q\Pr\Ub$
} G$ l>By
O*af`J{
public static interface Sort { # ;,b4O7@
public void sort(int[] data); _IAvFJI
} S9sFC!s1g
R5QSf+/T4
public static void swap(int[] data, int i, int j) { 2<$C6J0HM
int temp = data; 5t$ZEp-
data = data[j]; }2sc|K^
data[j] = temp; 8aCa(Xu(H
} y{Wtm7fnA
} #S[:Q.0 ;