[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; !OBEM1~ 1
} q0$ !y!~
int i1=l; ,17hGKM
int i2=mid+1; V>R8GSx
for(int cur=l;cur<=r;cur++){ [* @5\NWR}
if(i1==mid+1) ;k7xMZs
data[cur]=temp[i2++]; NXNY"r7~
else if(i2>r) ^zt-HDBR_
data[cur]=temp[i1++]; ;cPy1
else if(temp[i1] data[cur]=temp[i1++]; >)spqu]
else !OA]s%u
data[cur]=temp[i2++]; }&n<uUDH
} BB~OqZIP
} "Jt.lL ]5
4zJtOK?r"
} f2^r[kPX"
wtc!>
改进后的归并排序: e '2F#
v=_6XF
package org.rut.util.algorithm.support; Ytz)d/3T
bty/
import org.rut.util.algorithm.SortUtil; #bl6sa{E
#;%JT
/** kMtwiB|7j
* @author treeroot F'B8v3
* @since 2006-2-2 J]&y$?C
* @version 1.0 4F{)i
*/ LM7$}#$R
public class ImprovedMergeSort implements SortUtil.Sort { `FYv3w2
}z\_;\7
private static final int THRESHOLD = 10; 9T|IvQK8
qW!]co
/* s<oNE)xe
* (non-Javadoc) 1_\;- !t
* J.ck~;3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %!du,2
*/ 6ek;8dL
public void sort(int[] data) { Y}uCP1v
int[] temp=new int[data.length]; TiYnc3Bz}J
mergeSort(data,temp,0,data.length-1); $% 1vW=d
} <Wp QbQM
0KGY\,ae:;
private void mergeSort(int[] data, int[] temp, int l, int r) { (N&lHLy
int i, j, k; Xlb0/T<g!
int mid = (l + r) / 2; .Fnwm}
if (l == r) UEozAY
return; yqi^>Ce0
if ((mid - l) >= THRESHOLD) "FTfk
mergeSort(data, temp, l, mid); f. FYR|%tq
else SE),":aY
insertSort(data, l, mid - l + 1); ``OD.aY^s
if ((r - mid) > THRESHOLD) 'bo~%WA]n
mergeSort(data, temp, mid + 1, r); VUhbD
else SQqD:{#g"
insertSort(data, mid + 1, r - mid); L{(QpgHZ
#B:hPZM1
for (i = l; i <= mid; i++) { \ gLHi~
temp = data; |b*? qf
} ^4,a8`
for (j = 1; j <= r - mid; j++) { Sqo :-
temp[r - j + 1] = data[j + mid]; tI7:5Cm
} G3rj`Sg^c
int a = temp[l]; JaK}|
int b = temp[r]; ,t`Kv1
for (i = l, j = r, k = l; k <= r; k++) { 0#ClWynjRO
if (a < b) { Eh|]i;G%
data[k] = temp[i++]; G.(mp<-
a = temp; |37 g ~
} else { K91)qI;BD
data[k] = temp[j--]; w9o^s5n
b = temp[j]; e_/b2"{
} j{NNSi3
} /Wy.>YC|
} u%/goxA
#*TEq
/** `;>= '"O!\
* @param data s1e:v+B]
* @param l RLSc+kDH_
* @param i BRk0CLr5
*/ l'\pk<V
private void insertSort(int[] data, int start, int len) { lKlU-4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PSPmO'C+
} wlEdt1G
} * 1Od-3
} D5:{fWVsV/
} 7}vg.hmZ
@DZB9DDR
堆排序： L3n_ 5|
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package org.rut.util.algorithm.support; (ZY@$''
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import org.rut.util.algorithm.SortUtil; [-)r5Dsdq
i} N8(B(
/** 40|,*wi
* @author treeroot 1}tbH[
* @since 2006-2-2 om]4BRe
* @version 1.0 <0S,Q+&
*/ SF5@Vg
public class HeapSort implements SortUtil.Sort{ i:Zm*+Gi
$2u 'N:o
/* (non-Javadoc) +e-G,%>9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JqMDqPIQ
*/ %zSuK8kxV
public void sort(int[] data) { fwBRWr9
MaxHeap h=new MaxHeap(); OX"j#
h.init(data); ;\[(- )f!=
for(int i=0;i h.remove(); y|Ir._bt
System.arraycopy(h.queue,1,data,0,data.length); 1c;6xc,ub
} #'q<v"w
lRveHB&V
private static class MaxHeap{ g7&9"
E=cwq"
void init(int[] data){ ;s~X
this.queue=new int[data.length+1]; :<Fe
for(int i=0;i queue[++size]=data; =L C:SFzF
fixUp(size); 5*0y7K/D
} M4d47<'*~
} {U84 _Pi
U-:ieao@
private int size=0; )x]3Zq
4T?h
private int[] queue; gl]E_%tH
|=EZ1<KzD
public int get() { {O+Kw<d
return queue[1]; JMVNmq&0
} NHl|x4Zpw
=b[_@zq]
public void remove() { l27\diKPJ
SortUtil.swap(queue,1,size--); TuW/N L|
fixDown(1); z Nl ,
} J!5v~<v?-
file://fixdown ) /v6l
private void fixDown(int k) { >y}M.Mm
int j; %eJGte-
while ((j = k << 1) <= size) { CT\;xt,S
if (j < size %26amp;%26amp; queue[j] j++; ]IL;`>Gp
if (queue[k]>queue[j]) file://不用交换 7^M9qTEHp
break; /l{&iLz[
SortUtil.swap(queue,j,k); m~>Y{F2
k = j; 3 E3qd'
} _$p$")
} 3( ]M{4j
private void fixUp(int k) { r@{~ 5&L
while (k > 1) { ^+ wD43
int j = k >> 1; A"aV'~>
if (queue[j]>queue[k]) Dk='+\
break; sO5?aB&
SortUtil.swap(queue,j,k); J-ePE7i
k = j; o=RM-tR`v
} T2D<UhP
} w ~dk#=
.)+hH y
} ZlHDi!T
0Hs|*:Y1D
} n3lE,b
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SortUtil： "7v-`i
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package org.rut.util.algorithm; KE1ao9H8wR
zh$}~RG[
import org.rut.util.algorithm.support.BubbleSort; l?iSxqdT
import org.rut.util.algorithm.support.HeapSort; \@>b;4Fb+N
import org.rut.util.algorithm.support.ImprovedMergeSort; a"av#Y
import org.rut.util.algorithm.support.ImprovedQuickSort; i_kE^SSgm
import org.rut.util.algorithm.support.InsertSort; 0I{gJSK.,
import org.rut.util.algorithm.support.MergeSort; xP=/N!,#
import org.rut.util.algorithm.support.QuickSort; lKkN_ (/j
import org.rut.util.algorithm.support.SelectionSort; $O{duJU
import org.rut.util.algorithm.support.ShellSort; s!9dQ.
|8bq>01~
/** fgj^bcp-
* @author treeroot '<R>E:5
* @since 2006-2-2 {} Bf
* @version 1.0 j&UMjI9[
*/ "/]| Hhc{
public class SortUtil { YUf1N?z
public final static int INSERT = 1; b7/AnSR~Jt
public final static int BUBBLE = 2; A!vCb 8(TX
public final static int SELECTION = 3; +p8BGNW,
public final static int SHELL = 4; W[[bV
public final static int QUICK = 5; Fxc)}i`
public final static int IMPROVED_QUICK = 6; dDDGM:]
public final static int MERGE = 7; kF;5L)o
public final static int IMPROVED_MERGE = 8; hfcIvs/!
public final static int HEAP = 9; t |W)
-B$~`2-
public static void sort(int[] data) { u4"SH(
sort(data, IMPROVED_QUICK); Uu7dSU
} n}mR~YqD
private static String[] name={ za'6Y*CGgX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hCYQGx0
}; E(Rh#+]Y5
=&dW(uyzY
private static Sort[] impl=new Sort[]{ 7DKz;o
new InsertSort(), )s9',4$eK<
new BubbleSort(), $DBGLmw
new SelectionSort(), @FN*TJ
new ShellSort(), `O^G5 0
new QuickSort(), |BZDhd9<{
new ImprovedQuickSort(), WS2osBc
new MergeSort(), ^Cv^yTj;&
new ImprovedMergeSort(), ]l~V&#i_c
new HeapSort() Sb".]>^
}; !TAp+b
XI Jlc~2
public static String toString(int algorithm){ /Jf~25F
return name[algorithm-1]; ,&HR(jTo
} OOBhbpg!D
Zc"B0_&?:7
public static void sort(int[] data, int algorithm) { Q/I)V2a1i
impl[algorithm-1].sort(data); nH !3(X*
} $XBAZ<"hd
}%TSGC4{
public static interface Sort { Z.i{i^/#(
public void sort(int[] data); %b?$@H-Re
} ^")F7`PF
r,(et
public static void swap(int[] data, int i, int j) { nsb4S{
int temp = data; QO{y/{
data = data[j]; `A/j1UWJ
data[j] = temp; wzjU,Mwe
} /cFzotr"9
} Fk=}iB#(