[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; l!:L<B
} H>%L@Btw
int i1=l; .&n!4F'
int i2=mid+1; 'Jd*r(2d
for(int cur=l;cur<=r;cur++){ kpMo7n
if(i1==mid+1) .u]d5z BR
data[cur]=temp[i2++]; v=DC3oh-
else if(i2>r) Q~`{^fo1
data[cur]=temp[i1++]; P!lfk:M^;
else if(temp[i1] data[cur]=temp[i1++]; T>,[V:
else |{MXDx
data[cur]=temp[i2++]; V/RV,K1/
} ^JGwCHeb|H
} PoLk{{l3
wGWv<<Qw"
} |3>%(4 OS
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改进后的归并排序: {9{PU&?(
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package org.rut.util.algorithm.support; 7v}(R:*
'f8'|o)
import org.rut.util.algorithm.SortUtil; ;_0frX
c7nbHJi
/** LtV,djk
* @author treeroot At&kW3(
* @since 2006-2-2 ,lVQ-qw5
* @version 1.0 ,x?Jrcx~'C
*/ < Yc)F.:
public class ImprovedMergeSort implements SortUtil.Sort { -8v:eyc
VFKFO9
private static final int THRESHOLD = 10; J|([(
D-e?;<
/* q``/7
* (non-Javadoc) fnIF<Zt
* w8zr0z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }|wC7*^)
*/ *d31fBCk%
public void sort(int[] data) { Zh_3ydMD1
int[] temp=new int[data.length]; gL`aLg_
mergeSort(data,temp,0,data.length-1); /x\~5cC
} IA$=
x+v&3YF
private void mergeSort(int[] data, int[] temp, int l, int r) { [kMWsiZ
int i, j, k; 3E}j*lo
int mid = (l + r) / 2; U|8?$/*\
if (l == r) |o@U L
return; #k,.xMJ~
if ((mid - l) >= THRESHOLD) SAE'y2B*
mergeSort(data, temp, l, mid); z'\BZ5riX<
else l nJ
insertSort(data, l, mid - l + 1); ]l`V#Rd
if ((r - mid) > THRESHOLD) mZ.gS1Dq
mergeSort(data, temp, mid + 1, r); =h.` ey
else iDdR-T|
insertSort(data, mid + 1, r - mid); U|aEyMU
kIRjoKf<F
for (i = l; i <= mid; i++) { f`8?]@y{
temp = data; M|R\[ Zf
} 3,J{!
for (j = 1; j <= r - mid; j++) { V;gC[7H
temp[r - j + 1] = data[j + mid]; L1&` 3a?pL
} bGK-?BE5+A
int a = temp[l]; ^ Z3y
int b = temp[r]; &PX!'%X68h
for (i = l, j = r, k = l; k <= r; k++) { . HAFKB;
if (a < b) { :_Iz( 2hV
data[k] = temp[i++]; u/xP$
a = temp; 2iC BF-,
} else { T "#DhEM
data[k] = temp[j--]; C8=rsh
b = temp[j]; /l8wb~vl
} l~[ K.p&
} 9t8ccr
} A,c_ME+DVB
O`Htdnu
/** ~*`wRiUhis
* @param data O{Q+<fBC9
* @param l VBW][f
* @param i -b34Wz(
*/ !j3Xzn9
private void insertSort(int[] data, int start, int len) { R_2#7Xs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {c7@`AV]
} M XuHA?
} .=) *Qx+
} ONUa7
} }%<cFi &
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堆排序： D;OPsNQ
{mLv?"M]
package org.rut.util.algorithm.support; N:EljzvP}
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import org.rut.util.algorithm.SortUtil; fc4jbPp:M
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/** Iz&d S?p_
* @author treeroot ?"kU+tCxg
* @since 2006-2-2 =@nW;PUZ
* @version 1.0 G0Z$p6z
*/ s !II}'Je
public class HeapSort implements SortUtil.Sort{ ]qx!51S
^;$9>yi1
/* (non-Javadoc) v7v>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q?8#D
*/ [q^pMH#U"
public void sort(int[] data) { rEWuWv$
MaxHeap h=new MaxHeap(); "$q"Kilj%
h.init(data); ob/HO(h3
for(int i=0;i h.remove(); oWggh3eXk
System.arraycopy(h.queue,1,data,0,data.length); dvglh?7d
} !:~C/B{
'1zC|:,
private static class MaxHeap{ }:*?w>=
Xd.y or
void init(int[] data){ COd~H
this.queue=new int[data.length+1]; wkp$/IZKMj
for(int i=0;i queue[++size]=data; Np;tpq~
fixUp(size); (e9hp2m
} Y 2^y73&k
} 7w\!3pv
mXu";?2
private int size=0; J3'0^JP*
@JOsG-VW~
private int[] queue; ANR611-a
5U*${
public int get() { S)"vyGv
return queue[1]; i,L"%q)C
} L l,nt
la_
public void remove() { L>N)[;|
SortUtil.swap(queue,1,size--); R5 EC/@
fixDown(1); v4\ m9Pu4
} Ey_mK\'
file://fixdown WK.,q>#
private void fixDown(int k) { buHUBn[3)
int j; !H @nAz
while ((j = k << 1) <= size) { UaHN*@
if (j < size %26amp;%26amp; queue[j] j++; fUJe{C<H
if (queue[k]>queue[j]) file://不用交换 5!6}g<z&L
break; Mi`t$hmP
SortUtil.swap(queue,j,k); _HAr0R8BY
k = j; ke'OT>8
} }-&#vP~I
} wD@ wOC
private void fixUp(int k) { $:?=A5ttuo
while (k > 1) { %F<3_#Y
int j = k >> 1; t'C9;
if (queue[j]>queue[k]) N9z!-y'X
break; K81&BVx/
SortUtil.swap(queue,j,k); =g=Vv"B_
k = j; 1+-F3ROP
} l%`~aVGJ
} sZokiFJ
-Q1~lN m:
} b+BX >$
0%3T'N%
} 1i Q(q\%
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SortUtil： l_2YPon
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package org.rut.util.algorithm; Z3iX^
;;LiZlf
import org.rut.util.algorithm.support.BubbleSort; aQ)g7C
import org.rut.util.algorithm.support.HeapSort; ~>}7+p ?;
import org.rut.util.algorithm.support.ImprovedMergeSort; Ll^9,G"Tt
import org.rut.util.algorithm.support.ImprovedQuickSort; <a2Kc '
import org.rut.util.algorithm.support.InsertSort; PU\@^)$
import org.rut.util.algorithm.support.MergeSort; Ki3wqY
import org.rut.util.algorithm.support.QuickSort; 92*Y( >
import org.rut.util.algorithm.support.SelectionSort; <%oT}K\;
import org.rut.util.algorithm.support.ShellSort; TJs@V>,
2f9%HX(5
/** &oDu$%dkT
* @author treeroot %'dsb7n
* @since 2006-2-2 q,j` _ R4
* @version 1.0 4_\]zhS
*/ vpk~,D07yR
public class SortUtil { 1{wOjq(4
public final static int INSERT = 1; bvo }b-]E
public final static int BUBBLE = 2; cp+eh
public final static int SELECTION = 3; @'S !G"\
public final static int SHELL = 4; }$s._)a
public final static int QUICK = 5; 9K{0x7~
public final static int IMPROVED_QUICK = 6; 23`pog{n
public final static int MERGE = 7; yy\d<-X~
public final static int IMPROVED_MERGE = 8; w"j[c#vM
public final static int HEAP = 9; dJZ 9mP!d
e1K{*h
public static void sort(int[] data) { bJ6v5YA%
sort(data, IMPROVED_QUICK); GZ"J6/0-|
} }5ONDg(I~
private static String[] name={ \Eyy^pb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !q*]_1
}; =/HTe&
C#.d sl
private static Sort[] impl=new Sort[]{ B4# gT
new InsertSort(), Yc V*3`
new BubbleSort(), 6j~'>w(F
new SelectionSort(), H3o Um1
new ShellSort(), rW9ULS2d
new QuickSort(), h}P""
new ImprovedQuickSort(), bC]GL$ph9*
new MergeSort(), FDRpK5cw
new ImprovedMergeSort(), f.u[!T
new HeapSort() I*8_5?)g<
}; a~[]Ye@H
26c1Yl,DMn
public static String toString(int algorithm){ C8 2lT_7"
return name[algorithm-1]; [Uu!:SZ
} e@{8G^o>D
n!\&X9%[8
public static void sort(int[] data, int algorithm) { ZD]5"oHY
impl[algorithm-1].sort(data); )Y,>cg:z~
} |Ok1E
uY=}w"Db
public static interface Sort { 7~ok*yGw
public void sort(int[] data); `=~d^wKYJ3
} \9dC z;
9#niMv9
public static void swap(int[] data, int i, int j) { }!RFX)T
int temp = data; ,LJX
data = data[j]; _p=O*$b.
data[j] = temp; K)t+lJ
} }))JzrqAe
} To19=,: