[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; xX[{E x
} xQcMQ{&;
int i1=l; -#:Y+"'
int i2=mid+1; 5[0l08'D
for(int cur=l;cur<=r;cur++){ !)=#p9
if(i1==mid+1) Bil;@,Z#
data[cur]=temp[i2++]; k,o=1I
else if(i2>r) |ijW_r
data[cur]=temp[i1++]; S@l a.0HDA
else if(temp[i1] data[cur]=temp[i1++]; BBZ)H6TzL
else c9/ 'i
data[cur]=temp[i2++]; #m[w=Pu}
} >(YPkmH
} '3Y0D1`v
~gcst;
} P,+0
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改进后的归并排序: l)2HHu<
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package org.rut.util.algorithm.support; P"[l86:
2Q;Y@%G
import org.rut.util.algorithm.SortUtil; lFzQG:k@
bsmoLT
/** B "s8i{Vm
* @author treeroot "|~B};|MFF
* @since 2006-2-2 NUO,"Bqq
* @version 1.0 E|6Z]6[
*/ U3dR[*
public class ImprovedMergeSort implements SortUtil.Sort { 71.:p,Z@z
OD2ai]!v+
private static final int THRESHOLD = 10; eUUD|U*b
T(fR/~:z?
/* D aqy+:
* (non-Javadoc) h-)A?%Xt
* 1V?Sj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K:Xrfn{s
*/ f%"_U'
public void sort(int[] data) { IQ27FV|3
int[] temp=new int[data.length]; F.* snF
mergeSort(data,temp,0,data.length-1); \?`d=n=
} xF:poi
C">=2OO
private void mergeSort(int[] data, int[] temp, int l, int r) { :4L5@>b-
int i, j, k; @8 yE(
int mid = (l + r) / 2; ![MDmt5Ub^
if (l == r) |@n{tog+-
return; S.)8&
if ((mid - l) >= THRESHOLD) *#{.\R-D
mergeSort(data, temp, l, mid); '<E8<bi
else 7=ga_2
insertSort(data, l, mid - l + 1); S:GUR6g8D
if ((r - mid) > THRESHOLD) MZ+IorZl
mergeSort(data, temp, mid + 1, r); %A[p!U
else ~uD;_Y=u)r
insertSort(data, mid + 1, r - mid); #5"<.z
$vicHuX!
for (i = l; i <= mid; i++) { &oEq&
temp = data; ,IvnNnl2
} ^OcfM_4pN
for (j = 1; j <= r - mid; j++) { 6+d"3-R.
temp[r - j + 1] = data[j + mid]; $T%<'=u|E
} %'~<:>:"E
int a = temp[l]; aFm]?75
int b = temp[r]; YQ`#C#Wb
for (i = l, j = r, k = l; k <= r; k++) { #dm@%~B{.
if (a < b) { 7VZ JGRnn
data[k] = temp[i++]; s&_O2(l
a = temp; m_U6"\n 5
} else { 7G=P|T\
data[k] = temp[j--]; 4uVmhjT:X
b = temp[j]; t>`LO
} g~["O!K3
} ?GfA;O
} Pds*M?&F
(cew:z H
/** *b l{F\
* @param data KX}dn:;(3
* @param l uR@Wv^
* @param i 64j 4P 7
*/ c]0
private void insertSort(int[] data, int start, int len) { R;,HtN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >!p K94
} bh"v{V`=0
} ]4~D;mv
} tU2;Wb!Y
} @Lv_\^2/}
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堆排序： hLD;U J?S
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package org.rut.util.algorithm.support; &rWJg6/
? bg pUv
import org.rut.util.algorithm.SortUtil; Ph_m'fbf
X}FF4jE]D(
/** Ntrn("!
* @author treeroot H)fo4N4ii
* @since 2006-2-2 sU!q~`; J
* @version 1.0 #_|^C(]!
*/ A2bV[+Q
public class HeapSort implements SortUtil.Sort{ \>dG'
s'=]a-l~
/* (non-Javadoc) 3AL=*qq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xEWa<P#.u
*/ "G)? E|
public void sort(int[] data) { ] CE2/6Ph
MaxHeap h=new MaxHeap(); X0=-{<W
h.init(data); uCr
for(int i=0;i h.remove(); 'Em($A(
System.arraycopy(h.queue,1,data,0,data.length); nu-wQr
} FKm2slzb
CI{TgL:l
private static class MaxHeap{ <v^.FxId
JPzPL\
void init(int[] data){ >R-$JrU.=
this.queue=new int[data.length+1]; ;<rJ,X#
for(int i=0;i queue[++size]=data; 4"=pcHNV
fixUp(size); `Yve
} %.Y`X(g6/
} UG$i5PV%i
a]ey..m
private int size=0; .{>-.&
% m$Mnx
private int[] queue; h UDEjW@S
r?7^@
public int get() { ~!u94_:
return queue[1]; 2O>iAzc
} Iqv 5lo .
?UQE;0 B
public void remove() { Hq< Vk.Nk
SortUtil.swap(queue,1,size--); n<y!@p^X
fixDown(1); XM>ByfD{
} )9l5gZX'I
file://fixdown sq\oatMw[
private void fixDown(int k) { 0ppZ~}&
int j; ] +LleS5
while ((j = k << 1) <= size) { [D^KM|I%+
if (j < size %26amp;%26amp; queue[j] j++; IH'DCY:
if (queue[k]>queue[j]) file://不用交换 J}nE,U2
break; Tr-gdX ;
SortUtil.swap(queue,j,k); 4JT9EKo
k = j; N?ky2wG
} [x'xbQLGd
} hF.9\X]
private void fixUp(int k) { $ GL$ iA
while (k > 1) { :(!il?
int j = k >> 1; /t01z~_
if (queue[j]>queue[k]) ZS4lb=)G
break; K#}DXq
SortUtil.swap(queue,j,k); ?sdVd
k = j; F]q pDv
} +Y0Wiwr'
} ezY _7
3<AZ,gF1
} CZS{^6Ye
0~<d<a -@
} pBG(%3PpW
kz@@/DD/9
SortUtil： @K7#}7,t
YrS%Yvhj0
package org.rut.util.algorithm; AVyqtztQ
$RuJm\f
import org.rut.util.algorithm.support.BubbleSort; f.!)O@HzH
import org.rut.util.algorithm.support.HeapSort; ik=~`3Zp0
import org.rut.util.algorithm.support.ImprovedMergeSort; Z}5;K"T/
import org.rut.util.algorithm.support.ImprovedQuickSort; XnHcU=~q
import org.rut.util.algorithm.support.InsertSort; c8v+eyn
import org.rut.util.algorithm.support.MergeSort; jV;&*4if
import org.rut.util.algorithm.support.QuickSort; Ec y|l;
import org.rut.util.algorithm.support.SelectionSort; Em N0K'x
import org.rut.util.algorithm.support.ShellSort; wyzj[PDS
):
/** ;\DXRKR
* @author treeroot hu%UEB
* @since 2006-2-2 ^,]'Ut
* @version 1.0 &B1d+.+
*/ p6$ QTx
public class SortUtil { q g?q|W
public final static int INSERT = 1; /%\E2+6
public final static int BUBBLE = 2; lX/6u E_%
public final static int SELECTION = 3; }#ZQ\[
public final static int SHELL = 4; Jtnuo]{R
public final static int QUICK = 5; zRbooo{N
public final static int IMPROVED_QUICK = 6; _Pjo9z 9
public final static int MERGE = 7; -9Wx;u4]o
public final static int IMPROVED_MERGE = 8; gQ%'2m+
public final static int HEAP = 9; Z"<aS&GH
I8;pMr6
public static void sort(int[] data) { zM%ILv4
sort(data, IMPROVED_QUICK); br*L|s\P\9
} DBYD>UA
private static String[] name={ ]1>U@oK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =/&ob%J)9]
}; qcEiJ}-
L']EYK5
private static Sort[] impl=new Sort[]{ 3/+9#
new InsertSort(), >Ip>x!wi
new BubbleSort(), D$ zKkPYI
new SelectionSort(), 9!zUv:;
new ShellSort(), ^B8%Re%
new QuickSort(), P/5bNK!
new ImprovedQuickSort(), jFf2( AR
new MergeSort(), ; {$9Sc $
new ImprovedMergeSort(), <GC<uB |p
new HeapSort() Me;@/;c(
}; p(in.Xz
R}IMX9M=
public static String toString(int algorithm){ 3&.?9
return name[algorithm-1]; i,=greA]"
} C8>zr6)1
lp3 A B
public static void sort(int[] data, int algorithm) { ,7,x9qE"
impl[algorithm-1].sort(data); xjB2?:/2
} `VX]vumG
{Tb(4or?=b
public static interface Sort { KSU?Tg&JR
public void sort(int[] data); -Zc 6_]F|
} z6 2gF|Uj
mJe;BU"y]
public static void swap(int[] data, int i, int j) { ^Lr)STh
int temp = data; 8gwJ%"-K
data = data[j]; "W$,dWF
data[j] = temp; H)S" `j
} W}p>jP}
} ;M}'\.