[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; %7w8M{I R3
} yjH'<
int i1=l; $p&eS_f
int i2=mid+1; 3dLqlJ^7B
for(int cur=l;cur<=r;cur++){ M0\gp@Fe
if(i1==mid+1) s/s&d pT*
data[cur]=temp[i2++]; wU<j=lY?f
else if(i2>r) Dj'?12Onu=
data[cur]=temp[i1++]; A9u>bWIE7
else if(temp[i1] data[cur]=temp[i1++]; m)"(S
else /x$JY\cq`
data[cur]=temp[i2++]; \[.qN
} 5|N`:h'9M
} ^Jq('@
o$Nhx_F
} e*PUs
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改进后的归并排序: JMo r[*
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package org.rut.util.algorithm.support; %N&W_.F6
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import org.rut.util.algorithm.SortUtil; F ]Zg
yRl
/** Bp5ra9*5+~
* @author treeroot 9+s&|XS*
* @since 2006-2-2 YM'4=BlJHv
* @version 1.0 CI$z+zN
*/ /2c(6h
public class ImprovedMergeSort implements SortUtil.Sort { s@7hoU-+
C4.GtY8,d
private static final int THRESHOLD = 10; K%mR=u#%&
Y,Rr[i"j
/* G)t-W%D&
* (non-Javadoc) q/54=8*h0
* nXoDI1<[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5;p|iT
*/ S7nx4c2xK~
public void sort(int[] data) { q oi21mCn
int[] temp=new int[data.length]; X9]} UX
mergeSort(data,temp,0,data.length-1); z},\1^[
} Ddg!1SF
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private void mergeSort(int[] data, int[] temp, int l, int r) { nK?S2/o#A
int i, j, k; C~@m6K
int mid = (l + r) / 2; &Mudu/KTr
if (l == r) H)gc"aRe;Y
return; E?P>s T3B
if ((mid - l) >= THRESHOLD) 5V =mj+X?
mergeSort(data, temp, l, mid); r~f;g9I
else 0zSz[;A
insertSort(data, l, mid - l + 1); NW`.7'aWT
if ((r - mid) > THRESHOLD) ,(K-;Id4
mergeSort(data, temp, mid + 1, r); 0;">ETh=
else 87+fd_G
insertSort(data, mid + 1, r - mid); =mZYBm,IQ
Y:,C_^$w;
for (i = l; i <= mid; i++) { #Pf<2S
temp = data; <4vCx
} jK*d
for (j = 1; j <= r - mid; j++) { 4OgH+<G
temp[r - j + 1] = data[j + mid]; }8aqSD<:
} SE^l`.U@
int a = temp[l]; :?g+\:`/0j
int b = temp[r]; ,@?9H ~\
for (i = l, j = r, k = l; k <= r; k++) { rXD:^wUSc
if (a < b) { Fb%?qaLmCv
data[k] = temp[i++]; K|-m6!C!7
a = temp; GPhhg
} else { l7^^MnkC
data[k] = temp[j--]; B;e<.M)e
b = temp[j]; 4=|Q2qgFV
} M80Q6K
} pFNU~y'Kf
} NiW9/(;xB
(&/4wI^M
/** l9a81NF{s
* @param data 4aBVO%t
* @param l `VO;\s$5j
* @param i n9={D
*/ tm=,x~
private void insertSort(int[] data, int start, int len) { YARL/V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t^YtP3`?b
} jmaw-Rx
} Jk&!(YK&
} *p\Zc*N;%
} Kd+E]$F_OH
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堆排序： 63Gq5dF
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package org.rut.util.algorithm.support; wyB]!4yy,
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import org.rut.util.algorithm.SortUtil; >L4F'#I
8&"Jlz |
/** l$9k:#\FD
* @author treeroot ZZo<0kDk
* @since 2006-2-2 jF}kV%E
* @version 1.0 g%S/)R,,ct
*/ 7:uz{xPK6
public class HeapSort implements SortUtil.Sort{ a4~B
1Xm>nF~
/* (non-Javadoc) _1G/qHf^S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a_5s'Dh
*/ {Oy|c
public void sort(int[] data) { e8xq`:4Y
MaxHeap h=new MaxHeap(); <%uEWb)
h.init(data); ?VE'!DW
for(int i=0;i h.remove(); l_:P|
System.arraycopy(h.queue,1,data,0,data.length); Nr>UZlU8
} L{F]uz_[x
jwE=
private static class MaxHeap{ CV"}(1T
<af# C2`B
void init(int[] data){ sa o&
this.queue=new int[data.length+1]; T{+a48,;
for(int i=0;i queue[++size]=data; `+\$
fixUp(size); 9Q s5e
} Bx|W#:3e
} v(.mM9>
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private int size=0; ]9w)0iH
,>6a)2xh
private int[] queue; &>+T*-'
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public int get() { e3CFW_p
return queue[1]; ky[Cx!81C
} EDgtn)1
{*O+vtir%
public void remove() { Bv@p9 ] n
SortUtil.swap(queue,1,size--); <H60rON
fixDown(1); +CBN[/Z^i
} d>)=|
file://fixdown ZXYyG`3+
private void fixDown(int k) { T=42]h
int j; [}HPV+j=U
while ((j = k << 1) <= size) { wQy~5+LE
if (j < size %26amp;%26amp; queue[j] j++; ,%IP27bPW
if (queue[k]>queue[j]) file://不用交换 dR\yRC]I
break; T]&?^QGAZ
SortUtil.swap(queue,j,k); eUNaq&M
k = j; :3Q:pKg
} ` wEX;
} o;Z"I&
private void fixUp(int k) { 1K@ieVc
while (k > 1) { \os"w "
int j = k >> 1; 3<$Ek3X
if (queue[j]>queue[k]) o}KVT%}
break; w@,p`
SortUtil.swap(queue,j,k); ?B ,<gen
k = j; SQK82/
} 8ly)G
} K(upzn*a
us|Hb
} 1DcBF@3sWG
Q}B]b-c+E
} \a;xJzc9
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SortUtil： ]m 3cm
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package org.rut.util.algorithm; N80ogio_Tk
AA,/AKikd
import org.rut.util.algorithm.support.BubbleSort; nD eVYK
import org.rut.util.algorithm.support.HeapSort; Het"x
import org.rut.util.algorithm.support.ImprovedMergeSort; oA-,>:}g{
import org.rut.util.algorithm.support.ImprovedQuickSort; R~a9}&
import org.rut.util.algorithm.support.InsertSort; o#wly%i')
import org.rut.util.algorithm.support.MergeSort; @uRJl$3
import org.rut.util.algorithm.support.QuickSort; d5Ae67
import org.rut.util.algorithm.support.SelectionSort; Gy):hGgN
import org.rut.util.algorithm.support.ShellSort; @,sjM]
aB;f*x
/** s1cu5eCt
* @author treeroot \w1XOm [)
* @since 2006-2-2 `x _(EZ
* @version 1.0 Z9M$*Zp
*/ )Hin{~h
public class SortUtil { rMIX{K)'f
public final static int INSERT = 1; [UzacXt
public final static int BUBBLE = 2; d]sqj\Q57
public final static int SELECTION = 3; -n|>U:
public final static int SHELL = 4; c$ib-
public final static int QUICK = 5; |^5"-3Q
public final static int IMPROVED_QUICK = 6; r?[[.zm"7
public final static int MERGE = 7; e'$[PF
public final static int IMPROVED_MERGE = 8; qQ)1+^
public final static int HEAP = 9; -|}?+W
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public static void sort(int[] data) { n5"oXpcIx
sort(data, IMPROVED_QUICK); J7",fb
} u4 es8"
private static String[] name={ 1\@PrO35J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qZ[HILh!
}; fTR6]i;
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private static Sort[] impl=new Sort[]{ )ddJ\:
new InsertSort(), R$l- 7YSt
new BubbleSort(), l+2NA4s
new SelectionSort(), P]^OSPRg
new ShellSort(), !Q~>)$Cf^
new QuickSort(), b6k_u9m^E
new ImprovedQuickSort(), @R`6jS_gK
new MergeSort(), D ON.)F
new ImprovedMergeSort(), E@k'uyIu
new HeapSort() O6?{@l
}; IYq#|^)5+
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public static String toString(int algorithm){ 0^V<,CAV
return name[algorithm-1]; 7NT} Zwf
} ,_YI:xie|c
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public static void sort(int[] data, int algorithm) { &'k(v(>n,
impl[algorithm-1].sort(data); B6&[_cht
} ~x9J&*zxM
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public static interface Sort { X(x,6cC
public void sort(int[] data); @ntwdv;
} rz&V.,s
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public static void swap(int[] data, int i, int j) { XZk%5t|t
int temp = data; XYP RMa?
data = data[j]; q j21#q .
data[j] = temp; Peph..8Z
} y>t:flD*
} &uE )Vr4R