[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; wH[@#UP3l
} :{C#<g`
int i1=l; GVZ/`^ndM
int i2=mid+1; |_aE~_
for(int cur=l;cur<=r;cur++){ z6bTcs"7h
if(i1==mid+1) eKpH|S!xU
data[cur]=temp[i2++]; yNAvXkp
else if(i2>r) XU.ZYYZ=
data[cur]=temp[i1++]; 38Lc|w
else if(temp[i1] data[cur]=temp[i1++]; o"t+G/M
else -MoI{3a
data[cur]=temp[i2++]; RX:\@c&
} N(Us9
} 7ZS5u+o
M)6_Tal
} ,T_HE3K
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改进后的归并排序: VB*$lxX
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package org.rut.util.algorithm.support; y[S5
UDV,co
import org.rut.util.algorithm.SortUtil; nCEt*~t9VE
:{%6<j
/** lu_ y9o^
* @author treeroot D0=D8P}H:
* @since 2006-2-2 =jip* E^
* @version 1.0 ,JRYG<O_T
*/ -]\%a=]
public class ImprovedMergeSort implements SortUtil.Sort { URmx8=q
gKcP\m
private static final int THRESHOLD = 10; /iNCb&[
E=GCq=Uw
/* JAen=%2b
* (non-Javadoc) W'rft@J$
* wH~Q4)#=o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]q7\
*/ or\ 2)
public void sort(int[] data) { $I~=t{;"XV
int[] temp=new int[data.length]; Lp20{R
mergeSort(data,temp,0,data.length-1); ~R7rIP8Wr
} Lie\3W
\dCoY0Z ;
private void mergeSort(int[] data, int[] temp, int l, int r) { EUmQn8
int i, j, k; .Ff;St
int mid = (l + r) / 2; XCoN!~
if (l == r) R>BI;IcX
return; =El.uBz{
if ((mid - l) >= THRESHOLD) E}mnGe
mergeSort(data, temp, l, mid); 15#v|/wI'
else wqyx{W`~w
insertSort(data, l, mid - l + 1); ,g@U*06
if ((r - mid) > THRESHOLD) w<&Nn`V
mergeSort(data, temp, mid + 1, r); ]K?z|&N|HK
else 4vPQuk!
insertSort(data, mid + 1, r - mid); =:v\}/
C78YHjy
for (i = l; i <= mid; i++) { `Z>4}<~+
temp = data; :}FMauHh
} $jo}?Y+
for (j = 1; j <= r - mid; j++) { N \[Cuh8Fe
temp[r - j + 1] = data[j + mid]; Pe!uk4}w
} yPn5l/pDDr
int a = temp[l]; u2y?WcMv
int b = temp[r]; S%-L!V ,
for (i = l, j = r, k = l; k <= r; k++) { -4Zf0r1u
if (a < b) { 7EOn4I2@[
data[k] = temp[i++]; q0jzng
a = temp; C0zE<fl
} else { <a2t"rc
data[k] = temp[j--]; 'CjcOI s
b = temp[j]; ='T<jV`evu
} oat*ORL
} jL^zS XQB
} BQ,]]}e43z
p82&X+v/p
/** X3".
* @param data zv||&Hi
* @param l }7+G'=XI/
* @param i i>_V?OT#5
*/ +*a:\b"fx
private void insertSort(int[] data, int start, int len) { z(iB$;M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \evK.i*KfA
} nORm7sa9
} XBUO
} M/:kh,3
} fBS;~;l
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堆排序： fI`6]?W
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package org.rut.util.algorithm.support; ,E$^i~OO
X_Is#&6;
import org.rut.util.algorithm.SortUtil; &48wa^d
*I(>[m!
/** s[nXr
* @author treeroot Dsw(ti`@
* @since 2006-2-2 _OZrH(8
* @version 1.0 ' ]l,
*/ .d^8w97
public class HeapSort implements SortUtil.Sort{ NwIl~FNK
G?&0Z++
/* (non-Javadoc) jAfUz7@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AVGb;)x#
*/ {1'XS,2
public void sort(int[] data) { iyc}a6g
MaxHeap h=new MaxHeap(); Dh BUMDoB
h.init(data); .8uJ%'$)
for(int i=0;i h.remove(); qS*qHT(u19
System.arraycopy(h.queue,1,data,0,data.length); 9(QY~F
} \'&:6\-fw
R#`hT
private static class MaxHeap{ &=nwb4
Uxn_nh
void init(int[] data){ ~4.Tq{
this.queue=new int[data.length+1]; <QQgOaS`2
for(int i=0;i queue[++size]=data; vK!,vKa.
fixUp(size); F/tBr%RV
} 4gG&u33RrE
} GQ[:vX`
36@)a5
private int size=0; `S2YBKz,1
UaiDo"i
private int[] queue; qtnLQl"M
QK&<im-
public int get() { 7C9qkQ Jqn
return queue[1]; Yl% Ra1
} O`g44LW2n
i{I'+%~R
public void remove() { *Tl"~)'t~
SortUtil.swap(queue,1,size--); -d[9mS
fixDown(1); 2BS2$#c>
} S)C =Q~&
file://fixdown T12?'JL^r
private void fixDown(int k) { n9<QSX&~<
int j; lfOF]Kiqr
while ((j = k << 1) <= size) { 5]:fkx
if (j < size %26amp;%26amp; queue[j] j++; D06'"
if (queue[k]>queue[j]) file://不用交换 @C0{m7q
break; X<Rh-1$8F
SortUtil.swap(queue,j,k); 4};iL)
k = j; 4C/
} 1u:OzyJy
} # 5v 2`|)
private void fixUp(int k) { >(ku*
while (k > 1) { sl}bNzT#
int j = k >> 1; y)t< r
if (queue[j]>queue[k]) *^bqpW2$q
break; R;.zS^LL
SortUtil.swap(queue,j,k); sEt5!&
k = j; y>'^<xk
} OthQ)&pqX
} 30-XFl
#.$p7]
} HTao)`.
@ eqVug
} Us+|L|/
L)H7~.Dj
SortUtil： IxAKIa[HY
36`aG Y
package org.rut.util.algorithm; ^2mmgN
/0s1q
import org.rut.util.algorithm.support.BubbleSort; bmr.EB/
import org.rut.util.algorithm.support.HeapSort; L7el5Q!Y=
import org.rut.util.algorithm.support.ImprovedMergeSort; U;Se'*5xv
import org.rut.util.algorithm.support.ImprovedQuickSort; HDvj{
import org.rut.util.algorithm.support.InsertSort; pa N )t
import org.rut.util.algorithm.support.MergeSort; _}:9ic]e
import org.rut.util.algorithm.support.QuickSort; (=}U2GD*
import org.rut.util.algorithm.support.SelectionSort; M\ vj&T{k
import org.rut.util.algorithm.support.ShellSort; X3tpW`alo
x$QOOE]
/** )?^0<l#s
* @author treeroot }\|$8~
* @since 2006-2-2 Lfx&DK !
* @version 1.0 qXR>Z=K<
*/ 5rRYv~+
public class SortUtil { Tm-Nz7U^^
public final static int INSERT = 1; <_=a1x
public final static int BUBBLE = 2; P#\L6EO.
public final static int SELECTION = 3; -^=gQ7f9
public final static int SHELL = 4; ~b+4rYNxU_
public final static int QUICK = 5; GM%%7^uE
public final static int IMPROVED_QUICK = 6; DDq*#;dP
public final static int MERGE = 7; N&K:Jp
public final static int IMPROVED_MERGE = 8; q+.DZ @
public final static int HEAP = 9; zGHP{a1O7
Bf~
public static void sort(int[] data) { /B.\6
sort(data, IMPROVED_QUICK); ):; &~
} >KH.~Jfy
private static String[] name={ <]eWr:;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^8Tq0>n?
}; 1`)ie%=
fWhwI+
private static Sort[] impl=new Sort[]{ }OZ%U2PU
new InsertSort(), U+CZv1
new BubbleSort(), C=2
new SelectionSort(), Iz*'
new ShellSort(), f9W@!]LHJ
new QuickSort(), ?M.n 9|}y
new ImprovedQuickSort(), fNPHc_?Ybj
new MergeSort(), kngkG|du
new ImprovedMergeSort(), }26?bd@e`
new HeapSort() \`}Rdr!p%
}; .xS3,O_[
0%+S@_|
public static String toString(int algorithm){ dnTB$8&
return name[algorithm-1]; #56}RV1
} Eqc&iS~
TCYjj:/
public static void sort(int[] data, int algorithm) { -lV]((I&
impl[algorithm-1].sort(data); G7yCGT)vQ
} 8u Tq0d6(
X1?7}VO
public static interface Sort { =kH7
public void sort(int[] data); DygMavA.
} Q*&>Ui[&
s%z\szd*
public static void swap(int[] data, int i, int j) { A&*lb7X
int temp = data; 6*8"?S'
data = data[j]; J@PwN^`
data[j] = temp; ~CIA6&
} wvBx]$SC
} /6jt 5N&,