[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; T}1"
} \v\ONp"
int i1=l; );TB(PQsBT
int i2=mid+1; );iJ9+ V}
for(int cur=l;cur<=r;cur++){ ;-Os~81o?
if(i1==mid+1) ]3,
data[cur]=temp[i2++]; DO-M0L
else if(i2>r) hCF_pt+
data[cur]=temp[i1++]; F%&lM[N%
else if(temp[i1] data[cur]=temp[i1++]; jPZ+~:m+
else GHn0(o&K
data[cur]=temp[i2++]; 1!;~Y#
} Qt{V&Z7
} `AvK8Wh<+
5 -|7I7(G$
} nvLdgu4P>
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改进后的归并排序: d}Guj/cx,
N%Y!{k5T7
package org.rut.util.algorithm.support; ohyq/u+y~A
pO5j-d*
import org.rut.util.algorithm.SortUtil; S^|`*%pq
qzA_ ~=g
/** )B&`<1Oie
* @author treeroot +zk5du^gZ
* @since 2006-2-2 wme#8/eUk
* @version 1.0 4guR8 elM
*/ t\ z@k9
public class ImprovedMergeSort implements SortUtil.Sort { X(Mpg[,N"
w/*#TDR
private static final int THRESHOLD = 10; }a,ycFt
cC/32SmY4
/* sq(5k+y*J
* (non-Javadoc) u$zRm(!RB
* tN4&#YK<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sw; kUJ
*/ Fq <JxamR
public void sort(int[] data) { I~YV&12
int[] temp=new int[data.length]; `uk=2k}&m
mergeSort(data,temp,0,data.length-1); GYb&'#F~t
} fK]%*i_"
+aM[!pW(e
private void mergeSort(int[] data, int[] temp, int l, int r) { 1,$"'lKwt
int i, j, k; a'Odw2Q_
int mid = (l + r) / 2; :OjmaP
if (l == r) NvTK7? v
return; >b9J!'G,(
if ((mid - l) >= THRESHOLD) *q,nALs
mergeSort(data, temp, l, mid); Ja5od
else g@s`PBF7`
insertSort(data, l, mid - l + 1); ,YBO}l
if ((r - mid) > THRESHOLD) ,ZrR*W?iF
mergeSort(data, temp, mid + 1, r); "K9[P:nw
else Wf5;~RJC?
insertSort(data, mid + 1, r - mid); 8mRZ(B>% X
oHv.EO
for (i = l; i <= mid; i++) { :eD-'#@$u
temp = data; /4+Q; P
} na9YlJ\
for (j = 1; j <= r - mid; j++) { \<xo`2b
temp[r - j + 1] = data[j + mid]; )16+Pm8
} 5Uy*^C7M^
int a = temp[l]; UY({[?Se
int b = temp[r]; LY)Wwl*wc
for (i = l, j = r, k = l; k <= r; k++) { PZ'|)
if (a < b) { TJW8l[M
data[k] = temp[i++]; *HHL a
a = temp; [:(O`#
} else { K re*~ "
data[k] = temp[j--]; eFf9T@
b = temp[j]; 5izpQ'>
} m*jE\+)=^
} o$%KbfXO]
} TNN@G~@cm
AX6:*aZB
/** ecH7")
* @param data Kf(Px%G6K
* @param l E>*Wu<<
* @param i 1R*;U8?
*/ R=, pv'
private void insertSort(int[] data, int start, int len) { xW9R-J\W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k'&1,78[l
} mC\<fo-u
} ?6ssSjR}
} ;w]1H&mc*A
} 9eP*N(m<
EXH,+3fQp
堆排序： AB+lM;_>
>$CNR*}@
package org.rut.util.algorithm.support; ~l] w=[ z
{6Nbar@3
import org.rut.util.algorithm.SortUtil; L7GNcV]c
/u90)x
/** (vi^ t{k
* @author treeroot y,1U]1TP
* @since 2006-2-2 ,|?#+O{
* @version 1.0 x5smJ__/
*/ lB/^
public class HeapSort implements SortUtil.Sort{ ;*FY+jM
|9$C%@8
/* (non-Javadoc) hv>Xr=RE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <_*5BO
*/ | a i#rU
public void sort(int[] data) { >QN-K]YLL
MaxHeap h=new MaxHeap(); ,-k?"|tQ
h.init(data); U61 LMH
for(int i=0;i h.remove(); Zm++5b`W/[
System.arraycopy(h.queue,1,data,0,data.length); [h' 22W
} IQ~Anp^R
8::y5Yv]
private static class MaxHeap{ Lp}V 94xT
D,FgX/&i/
void init(int[] data){ !nsr( 7X2
this.queue=new int[data.length+1]; 32anmVnf
for(int i=0;i queue[++size]=data; P92pQ_W
fixUp(size); =x(k)RTDu
} ;$$w`LyP
} ds+2z=!!e
m432,8 K3r
private int size=0; 1g,gilc
9PO5GYU
private int[] queue; %a0q|)Nrj
=Y!.0)t;*
public int get() { v1}ijls
return queue[1]; @raJB'
} ~+BU@PHv
'h~IbP
public void remove() { %zEy.7Ux
SortUtil.swap(queue,1,size--); %'=TYvB 2
fixDown(1); U Lq`!1{
} :U'n0\
file://fixdown VB8eGMo
private void fixDown(int k) { &\6(iL
int j; SLNOOEN
while ((j = k << 1) <= size) { QL2LIs
if (j < size %26amp;%26amp; queue[j] j++; F`,bFQ
if (queue[k]>queue[j]) file://不用交换 myOW^
break; ^Dfqc-]
SortUtil.swap(queue,j,k); A93(} V7I
k = j; 6wq%4RI0
} p`U#
} ~fcC+"7q/
private void fixUp(int k) { @V Tw>=94
while (k > 1) { Vz!{nL0Q(
int j = k >> 1; "~6&rt
if (queue[j]>queue[k]) I7|a,Q^f
break; ev/)#i#s{
SortUtil.swap(queue,j,k); Dq!YB[Z$:
k = j; ?aTC+\=
} CJ)u#PmkJ
} *?Wr^T
]eFNR1<OP
} km lb,P
a #p`l>rx
} =bvLMpa
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SortUtil： vt(n: Xk
e(DuJ-
package org.rut.util.algorithm; 0s}gg[lj
{ynI]Wj`L
import org.rut.util.algorithm.support.BubbleSort; v6x jLP;O
import org.rut.util.algorithm.support.HeapSort; Sv>CVp*
import org.rut.util.algorithm.support.ImprovedMergeSort; PIQd=%?'
import org.rut.util.algorithm.support.ImprovedQuickSort; qla=LS\-A+
import org.rut.util.algorithm.support.InsertSort; `r\/5|M
import org.rut.util.algorithm.support.MergeSort; +8|Xj!!*}
import org.rut.util.algorithm.support.QuickSort; !l.^]|
import org.rut.util.algorithm.support.SelectionSort; ,~l4-x.,
import org.rut.util.algorithm.support.ShellSort; l}g_<
Xo.3OER
/** }J\7IsM&
* @author treeroot C^U>{jf !
* @since 2006-2-2 gMZrtK`<
* @version 1.0 >k/ rJ[Sc
*/ = 4'r+2[
public class SortUtil { 5Go@1X]I
public final static int INSERT = 1; wb]Z4/j#
public final static int BUBBLE = 2; SEZ08:>x r
public final static int SELECTION = 3; irB}h!@
public final static int SHELL = 4; .0X 5Vy
public final static int QUICK = 5; ~1,$
public final static int IMPROVED_QUICK = 6; = P$7 "
public final static int MERGE = 7; 0\"]XYOH
public final static int IMPROVED_MERGE = 8; < r b5'
public final static int HEAP = 9; t`V U<
EzCi%>q
public static void sort(int[] data) { YsTF10
sort(data, IMPROVED_QUICK); Ac +fL
} [,z>msEB.
private static String[] name={ {;JFoe+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *tDxwD7
}; .^rsVNG
=`V9{$i
private static Sort[] impl=new Sort[]{ akgvV~5
new InsertSort(), +~lPf.
new BubbleSort(), MP Q?Q]'
new SelectionSort(), LN'})CI8m
new ShellSort(), WO+>W+|N
new QuickSort(), (|y@ftr@
new ImprovedQuickSort(), }~<9*M-P
new MergeSort(), nqcD#HUv
new ImprovedMergeSort(), Et)j6xz/F
new HeapSort() 8..g\ZT
}; 7V~ gqum
?U~`'^@
public static String toString(int algorithm){ UX?S#:h
return name[algorithm-1]; 09Z\F^*$F
} >+ Im:fD
f+QDjJ?z
public static void sort(int[] data, int algorithm) { ^p\n/#B
impl[algorithm-1].sort(data); M>jk"*hA|
} ?SoRi</1
hBW,J$B
public static interface Sort { p;2NO&
public void sort(int[] data); emS7q|^
} >~G _'~_f
%i.;~>
public static void swap(int[] data, int i, int j) { \e?w8R.6w^
int temp = data; G`u";w_
data = data[j]; $n<X'7@0
data[j] = temp; z'Fu} ho
} F4&`0y:
} 'd<1;Ayw