[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; j>|mpfU
} q,.@<sW
int i1=l; $6*6%T5}
int i2=mid+1; Rj])c^ZA'*
for(int cur=l;cur<=r;cur++){ ifcC [.im
if(i1==mid+1) _F tI2G9
data[cur]=temp[i2++]; ?;CMsO*q
else if(i2>r) CdTE~O<)
data[cur]=temp[i1++]; n_P2l<F~/x
else if(temp[i1] data[cur]=temp[i1++]; xC-&<s
else "Rr650w[
data[cur]=temp[i2++]; \@GKVssw
} }\hz@G<
} '\/|K
eBg:[44V
} :Wd@Qy?;
tZ_D.syBAc
改进后的归并排序: i'uSu8$'*
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package org.rut.util.algorithm.support; 05Y4=7,!
m 9.BU2.
import org.rut.util.algorithm.SortUtil; )LjW=;(b
.dTXC'
/** -=a,FDeR
* @author treeroot {*AYhZ
* @since 2006-2-2 C=<PYkt,L
* @version 1.0 +$\/HO
*/ _REAzxeS
public class ImprovedMergeSort implements SortUtil.Sort { X.J$ 5b
fW3NH7aUG
private static final int THRESHOLD = 10; M|}V6F_y
,]_<8@R
/* lkaWwjv_D
* (non-Javadoc) HCZVvsG
* 8;"HM5+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b+e9Pi*\
*/ #B!<gA$/
public void sort(int[] data) { WADAp\&
int[] temp=new int[data.length]; F$te5 `a
mergeSort(data,temp,0,data.length-1); ]Wx?k7T
} X}_Gk5q*
pra0:oHN
private void mergeSort(int[] data, int[] temp, int l, int r) { nIf~ds&TT
int i, j, k; y4j\y ? T8
int mid = (l + r) / 2; ]jgMN7
if (l == r) ;U]Ym48
return; MWJ}
if ((mid - l) >= THRESHOLD) 0Q!/A5z
mergeSort(data, temp, l, mid); 8\Kpc;zb
else [K""6D
insertSort(data, l, mid - l + 1); s%i \z }/
if ((r - mid) > THRESHOLD) F-%Hw
mergeSort(data, temp, mid + 1, r); ,C}s8|@k
else FqXE6^
insertSort(data, mid + 1, r - mid); @cu#rWiG
@!p0<&R@x
for (i = l; i <= mid; i++) { G|.6%-
temp = data; ;C,t`(
} {iYrC m[_
for (j = 1; j <= r - mid; j++) { WYd9p;k
temp[r - j + 1] = data[j + mid]; 3wN{k\ns
} qijQRxS
int a = temp[l]; ;.Y-e Q,
int b = temp[r]; B,U|V
for (i = l, j = r, k = l; k <= r; k++) { @K1'Q!S*
if (a < b) { {h0T_8L/
data[k] = temp[i++]; /z`.-D(
a = temp; bi[g4,`Z;
} else { pMd!Jl#(N
data[k] = temp[j--]; 6o&ZS @
b = temp[j]; wWQt
} mjKu\7F
} <RuLIu
} E?S
6G7+&g`
/** )3.=)?XW
* @param data ;e6L@)dp9
* @param l epgAfx-_OH
* @param i rqz48~\lJ
*/ V-dyeb
private void insertSort(int[] data, int start, int len) { a%r(F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); = OzpI
} eh}|Wd7J
} GD%qrK?
} [*1:?mD$
} l~mj>$
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堆排序： yVWt%o/
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package org.rut.util.algorithm.support; XZT|ID_u"
$}B&u)
import org.rut.util.algorithm.SortUtil; MavidkS
>Se-5QtLcf
/** +2>, -V
* @author treeroot |lN=q44I
* @since 2006-2-2 qtuT%?wT@Z
* @version 1.0 w|f@sB>j
*/ vI]V@il
public class HeapSort implements SortUtil.Sort{ 5Gm8U"UR
m[ER~]L/C
/* (non-Javadoc) ; W$.>*O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .Hg{$SAC(w
*/ `aSbGMz
public void sort(int[] data) { I#;.;%u
MaxHeap h=new MaxHeap(); 2V*;=cv~z
h.init(data); EAHdt=8W{
for(int i=0;i h.remove(); MzF,is
System.arraycopy(h.queue,1,data,0,data.length); lQxEiDIL
} ? M.'YB2
9{0%M
private static class MaxHeap{ :s1.TQ;Y(
!Wj`U$];
void init(int[] data){ E:;MI{;7
this.queue=new int[data.length+1]; -`$J& YU
for(int i=0;i queue[++size]=data; r{f$n
fixUp(size); Gn4XVzB`O
} y5XFJj
} (a"/cH
OW#G{#.6R
private int size=0; `|mV~F|
Mm!;+bM%
private int[] queue; k>~D
v1/Y0
public int get() { ]Bs{9=2
return queue[1]; 93=?^
} ,;Uf>8~
kOC0d,
public void remove() { _Ud!tK*H
SortUtil.swap(queue,1,size--); ]W5p\(1g
fixDown(1); S;oRE'kk
} . BX*C
file://fixdown L uW""P/
private void fixDown(int k) { 7Hj7b:3K&!
int j; 1$^r@rP
while ((j = k << 1) <= size) { bf.yA:~U
if (j < size %26amp;%26amp; queue[j] j++; xrI9t?QaCb
if (queue[k]>queue[j]) file://不用交换 L-zU%`1{M
break; h92KU
SortUtil.swap(queue,j,k); [.6bxK
k = j; (W}DMcuSd
} /lhk} y^
} (Ffa{Tt!
private void fixUp(int k) { ;|W:,a{kS
while (k > 1) { HVzkS|^F
int j = k >> 1; EVE"F'Ww,_
if (queue[j]>queue[k]) c= ?Tu
break; SLp nVD:'1
SortUtil.swap(queue,j,k); &|' NDcp
k = j; 4n1 g@A=y
} D *IeG>%
} 'I:_}q
Wtp=1
} j?g#8L;W\w
ej1WkaR8
} 7xR:\FBa^
N vTp1kI]
SortUtil： ^:,wk7
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package org.rut.util.algorithm; *pABdP+
Ndyo)11z
import org.rut.util.algorithm.support.BubbleSort; "KSdC8MS
import org.rut.util.algorithm.support.HeapSort; hZ.](rD
import org.rut.util.algorithm.support.ImprovedMergeSort; 7#X`D
import org.rut.util.algorithm.support.ImprovedQuickSort; (ak&>pk;
import org.rut.util.algorithm.support.InsertSort; 1^ go)(Mx
import org.rut.util.algorithm.support.MergeSort; pbIVj3-lY
import org.rut.util.algorithm.support.QuickSort; E>O@Bv
import org.rut.util.algorithm.support.SelectionSort; V|*3*W
import org.rut.util.algorithm.support.ShellSort; 5PP^w~n
52^,qP'6
/** GiXs`Yt|
* @author treeroot jj]|}G
* @since 2006-2-2 t2|0no
* @version 1.0 )J2UNIgN
*/ oq b(w+<
public class SortUtil { }_H\75Iv
public final static int INSERT = 1; %b~ND?nn-
public final static int BUBBLE = 2; e AaS }g 0
public final static int SELECTION = 3; 2 zG;91^
public final static int SHELL = 4; m9]Ge]
public final static int QUICK = 5; VW;E14
public final static int IMPROVED_QUICK = 6; ZS`Kj(D
public final static int MERGE = 7; MmFtG-
public final static int IMPROVED_MERGE = 8; @x;(yqOb
public final static int HEAP = 9; rV?@Kgxi
2 gca*
public static void sort(int[] data) { H\a\xCP3
sort(data, IMPROVED_QUICK); ^g"p}zf L"
} }wI+eMr
private static String[] name={ OI3j!L2f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JxEz1~WK &
}; &l4kwds R
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private static Sort[] impl=new Sort[]{ pd.unEWwF
new InsertSort(), pRUQMPn (
new BubbleSort(), cmq4w&x/
new SelectionSort(), A]drNFE
new ShellSort(), I7#JT?\}
new QuickSort(), 8U7dd[
new ImprovedQuickSort(), nwqA\
new MergeSort(), @gM}&G08
new ImprovedMergeSort(), 2!9Zw$
new HeapSort() T21?~jS
}; ] ;CJ6gM~
}OTJ{eG
public static String toString(int algorithm){ d>Nh<PqH6
return name[algorithm-1]; Q("4R
} }z|9F(I
7KJ0>0~Et
public static void sort(int[] data, int algorithm) { t~44ub6GN`
impl[algorithm-1].sort(data); DF gM7if
} e"*ho[
nV`W0r(f'
public static interface Sort { 4^d).{&X
public void sort(int[] data); o|#F@L3i
} :2')`xT
Wt=@6w&
public static void swap(int[] data, int i, int j) { q:iu hI$~G
int temp = data; 2"%f:?xV{
data = data[j]; L=M'QJl9
data[j] = temp; _>?.MUPB
} AN|f:259
} !$!%era`