[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; 2fkIdy#n@
} ~T>jBYI0
int i1=l; z*M}=`M$
int i2=mid+1; :]B% >*;}
for(int cur=l;cur<=r;cur++){ P"R97#C
if(i1==mid+1) _.d}lK3$2
data[cur]=temp[i2++]; \3H<z@;
else if(i2>r) (30<oE{
data[cur]=temp[i1++]; t$]&,ucW#
else if(temp[i1] data[cur]=temp[i1++]; i{tTUA
else |D;_:x9
data[cur]=temp[i2++]; ,J~,ga~
} CB*`
} O+G~Qp0b>
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} 6keP':bt
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改进后的归并排序: N,j>;x3xT
#&^ZQs<
package org.rut.util.algorithm.support; H$~M`Y9I~
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import org.rut.util.algorithm.SortUtil; O`wYMng)
qDby!^ryc
/** a. h?4+^bN
* @author treeroot xa87xX=a
* @since 2006-2-2 CrnB{Z4L
* @version 1.0 G$;>ueM
*/ QD$}-D[
public class ImprovedMergeSort implements SortUtil.Sort { P]pmt1a
O" %Hprx
private static final int THRESHOLD = 10; E$]a?uA:
m>]>$=%
/* eaV3)uP
* (non-Javadoc) cT/3yf
* gB(9vhj$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Eyr5jXt%;
*/ -Bo86t)F
public void sort(int[] data) { *'Z-OY<V
int[] temp=new int[data.length]; wrH7 pd
mergeSort(data,temp,0,data.length-1); jZXVsd
} -M"IVyy@
M*d-z
private void mergeSort(int[] data, int[] temp, int l, int r) { wXc,FD$
int i, j, k; ~?FK ; (
int mid = (l + r) / 2; )-0[ra]
if (l == r) eQ$N:]
return; ' 2>l
if ((mid - l) >= THRESHOLD) 84iJ[Fq{
mergeSort(data, temp, l, mid); Z:I*y7V-
else }Q/G &F
insertSort(data, l, mid - l + 1); :&Qb>PH[
if ((r - mid) > THRESHOLD) 'n~fR]h}
mergeSort(data, temp, mid + 1, r); sS C?io
else |WB"=PE
insertSort(data, mid + 1, r - mid); WI,40&<
0(wf{5
for (i = l; i <= mid; i++) { uVN.=
temp = data; >HE,'
} tY{; U#9
for (j = 1; j <= r - mid; j++) { ,/~[S
temp[r - j + 1] = data[j + mid]; )yHJ[
} @(Z( /P;:
int a = temp[l]; M[A-1]'
int b = temp[r]; Oc7 >S.1
for (i = l, j = r, k = l; k <= r; k++) { [!^cd%l
if (a < b) { ows^W8-w
data[k] = temp[i++]; 6H0W`S0a
a = temp; R"NGJu9
} else { >OT\~C
data[k] = temp[j--]; LRWOBD
b = temp[j]; 5!<o-{J[(=
} #-,g&)`]
} %>i@F=O2<
} zCBplb
/v5qyR7an
/** rxQ<4
* @param data ICk(z~D~
* @param l WS5A Y @(~
* @param i *]5z^> q;7
*/ *%3oyWwCd
private void insertSort(int[] data, int start, int len) { ,NDh@VYe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :#WEx_]
} >b'w'"
} $)Wb#B
} @\ }sb]
} TfL4_IAG.
X&s7%]n+
堆排序： Y=9j2 ]t
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package org.rut.util.algorithm.support; ^b=XV&{q
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import org.rut.util.algorithm.SortUtil; (s088O
[G\o+D?2
/** l1}R2lSEO
* @author treeroot jA,|JgN|n
* @since 2006-2-2 QeL{Wa-2F
* @version 1.0 58J_ w X
*/ IK3qE!,&U
public class HeapSort implements SortUtil.Sort{ YX_vv!-]
90p3V\LO
/* (non-Javadoc) i(0hvV>'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >=Jsv
*/ b7!UZu]IEv
public void sort(int[] data) { $R";
MaxHeap h=new MaxHeap(); Z9xR
h.init(data); ^1.7Juvb
for(int i=0;i h.remove(); $:e)$Xnn-
System.arraycopy(h.queue,1,data,0,data.length); dN<5JQql
} *E}Oh
XoJgs$3B
private static class MaxHeap{ }%+qP+O\
]/_G-2.R
void init(int[] data){ bK<}0Ja[
this.queue=new int[data.length+1]; W<Z$YWr
for(int i=0;i queue[++size]=data; Evkt_vvf
fixUp(size); AVv#\JrRW
} -?5$ PH
} V}SyD(8~
{S*!B
private int size=0; pisB,wP$2
o!utZmk$
private int[] queue; UQ~4c,
UW/N MjK
public int get() { 6b<+8w
return queue[1]; V!xwb:J
} k}zd' /b
tOM(U-7Z&
public void remove() { <m0{'xw
SortUtil.swap(queue,1,size--); /W`$yM3
fixDown(1); J\{$ot
} t:=k)B
file://fixdown b_=8!Q.:
private void fixDown(int k) { 87<9V.s2
int j; Y\p$SN
while ((j = k << 1) <= size) { 1ef'7a7e8
if (j < size %26amp;%26amp; queue[j] j++; <s}|ZnGE
if (queue[k]>queue[j]) file://不用交换 /EU; ?O
break; o%`npi1y
SortUtil.swap(queue,j,k); |1l&@#j!2
k = j; ~{M@?8wi
} wbi3lH:;
} 9U^$.Lb
private void fixUp(int k) { Us-A+)r*!
while (k > 1) { ]'k[u
int j = k >> 1; -72j:nk
if (queue[j]>queue[k]) X>t3|h
break; M35Ax],:^
SortUtil.swap(queue,j,k); y3IWfiz>/d
k = j; ;%zC@a~{
} 3t(c_:[%
} r]LCvsVa
C1QV[bJK
} p538r[f<
TV:<TR
} 5H !y46z
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SortUtil： ")UwkF
q]c5MlJXF
package org.rut.util.algorithm; k$"d^*R
nCnjq=
import org.rut.util.algorithm.support.BubbleSort; )D@~|j:
import org.rut.util.algorithm.support.HeapSort; (q;bg1\UK
import org.rut.util.algorithm.support.ImprovedMergeSort; ;hDa@3|]34
import org.rut.util.algorithm.support.ImprovedQuickSort; <+U|dX
import org.rut.util.algorithm.support.InsertSort; _D;@v?n6!O
import org.rut.util.algorithm.support.MergeSort; MDO$m g
import org.rut.util.algorithm.support.QuickSort; PuCc2'#
import org.rut.util.algorithm.support.SelectionSort; )&W**!(C
import org.rut.util.algorithm.support.ShellSort; 'Pd(\$ZY
fi%r<]@
/** p{tK_ZBy]c
* @author treeroot %s=Dj2+
* @since 2006-2-2 ERMa# L
* @version 1.0 l]LxL
*/ >)nS2bOE
public class SortUtil { t;q7t!sC]
public final static int INSERT = 1; nvq3*
public final static int BUBBLE = 2; #%,RJMv
public final static int SELECTION = 3; G=/k>@Di
public final static int SHELL = 4; gwB\<rzG
public final static int QUICK = 5; XEH}4;C'{
public final static int IMPROVED_QUICK = 6; rNN j0zw>
public final static int MERGE = 7; uGH?N
public final static int IMPROVED_MERGE = 8; 9";sMB}W*
public final static int HEAP = 9; =?Fkn4t
nHOr AD|&
public static void sort(int[] data) { IQ!Fv/I<
sort(data, IMPROVED_QUICK); :7.Me;RA
} ,?cH"@RJ
private static String[] name={ }%!tT\8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^V*-1r1
}; a|j%n
0S/' 94%w
private static Sort[] impl=new Sort[]{ fRZ KEIyk
new InsertSort(), @I3eK^#|P
new BubbleSort(), q1VH5'p@
new SelectionSort(), b{M7w
new ShellSort(), f{#j6wZM
new QuickSort(), Gctsp2ndW
new ImprovedQuickSort(), |9K<-yD
new MergeSort(), W m&
new ImprovedMergeSort(), "j<bA8$Vw
new HeapSort() g(x9S'H3l
}; Of}|ib^t
yx{3J
public static String toString(int algorithm){ T)~9Wac
return name[algorithm-1]; AasZuO_I
} `RRE(SiKU
R=j% S!
public static void sort(int[] data, int algorithm) { BHFY%6J!
impl[algorithm-1].sort(data); }CGSEr4'w~
} Cr ?4Ngw
bJ /5|E?
public static interface Sort { _D7]-3uC!
public void sort(int[] data); m#e3%150{
} {D&9UZm
UL@9W6
public static void swap(int[] data, int i, int j) { s,]%dG!
int temp = data; v;1F[?@3Y
data = data[j]; 9nSWE W
data[j] = temp; wBk@F5\<
} }YhtUWz].
} DPn=n9n2