[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; E,}(jAq7
} Tlar@lC|u
int i1=l; nOm-Yb+F
int i2=mid+1; {<P{uH\l
for(int cur=l;cur<=r;cur++){ b(HbwOt~3
if(i1==mid+1) K ; eR)
data[cur]=temp[i2++]; (i.7\$4
else if(i2>r) /5wIbmz@I
data[cur]=temp[i1++]; )azK&f@tR|
else if(temp[i1] data[cur]=temp[i1++]; W<c95QD.
else I1)t1%6"vJ
data[cur]=temp[i2++]; F*4zC@;
} U/s!Tb>`
} 9Qb6ek
SZVAf|]Yg
} 7Eo;TNbb
E4cPCQyeH
改进后的归并排序: lzbAx
bSkr:|A7
package org.rut.util.algorithm.support; !+)5?o
v.!e1ke8D*
import org.rut.util.algorithm.SortUtil; -)%gMD~z1
x4N*P
/** .At^b4#(
* @author treeroot qa>H@`P
* @since 2006-2-2 <hBd #J
* @version 1.0 dcH@$D@~S
*/ ^Z>Nbzr{
public class ImprovedMergeSort implements SortUtil.Sort { kQ99{lH,5
&~&oB;uR
private static final int THRESHOLD = 10; cna/?V
B1k;!@@14
/* }8Yu"P${Y
* (non-Javadoc) ..fbRt
* `L m9!?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %0_}usrsk
*/ #JYH5:*
public void sort(int[] data) { :>*0./hG
int[] temp=new int[data.length]; 08qM?{zo^
mergeSort(data,temp,0,data.length-1); ]j+J^g
} ,382O$C
K}(@Ek
private void mergeSort(int[] data, int[] temp, int l, int r) { =`OnFdI
int i, j, k; gkFw=Cd
int mid = (l + r) / 2; ?BnX<dbi&
if (l == r) 1a tQ9
return; Zq"
if ((mid - l) >= THRESHOLD) 2o<aEn&7|e
mergeSort(data, temp, l, mid); W}P9I&3
else ZkqZO#nq C
insertSort(data, l, mid - l + 1); Zv5vYe9Ow
if ((r - mid) > THRESHOLD) @ruWnwb
mergeSort(data, temp, mid + 1, r); \qkb8H
else 560`R>
insertSort(data, mid + 1, r - mid); HXb_k1n
k9!euj&
for (i = l; i <= mid; i++) { t8f:?
temp = data; >9Z7l63+}
} zI$'D|A
for (j = 1; j <= r - mid; j++) { YZZog6%
temp[r - j + 1] = data[j + mid]; =Bos>;dl
} 7{Zs"d{s
int a = temp[l]; !7n`-#)
int b = temp[r]; 6B!v;93U
for (i = l, j = r, k = l; k <= r; k++) { &R,QJ4L
if (a < b) { 6$&%z Eh
data[k] = temp[i++]; -u^f;4|u
a = temp; Y-.aSc53
} else { XaH;
data[k] = temp[j--]; X@\ 9}*9
b = temp[j]; oIGF=x,e8
} xp F(de
} v!j%<H`NI
} eL1)_M;{
w^^8*b<
/** srryVqgS
* @param data :U,-v
* @param l UG=],\E2
* @param i @e2P3K gg
*/ jP\5bg-}
private void insertSort(int[] data, int start, int len) { jE2EoQi,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A-l[f\
} 4"s/T0C
} 9.wZhcqqU
} tPChVnB
} `B/74Wa3q
@}ioK=A
堆排序： b!T-{Ns6
&*; Z(ul&9
package org.rut.util.algorithm.support; g4Nl"s*~
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import org.rut.util.algorithm.SortUtil; XBm ^7'
C1x(4&h
/** y]}N[l
* @author treeroot kC iOcl*$
* @since 2006-2-2 KidbcZ
* @version 1.0 6E$ET5p&l
*/ &sooXKlv|
public class HeapSort implements SortUtil.Sort{ kd OIL2T
N>IkK*v
/* (non-Javadoc) BeFXC5-qat
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _xGC0f (
*/ +J3Y}A4W3X
public void sort(int[] data) { ,[[Xo;q
MaxHeap h=new MaxHeap(); $pajE^d4V
h.init(data); H^XTzE
for(int i=0;i h.remove(); xiO10:L4
System.arraycopy(h.queue,1,data,0,data.length); XnB-1{a1
} %FJB9?9=|
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private static class MaxHeap{ VgO.in^q
#]J"j]L
void init(int[] data){ s1J(-O
this.queue=new int[data.length+1]; GHFYIor
for(int i=0;i queue[++size]=data; I\f\k>;
fixUp(size); y'_2|5!Qs
} 0Vj!'=Ntv
} p:xVi0
MPMAFs
private int size=0; %UB+N8x`a
3K%_wCZ
private int[] queue; 7)*QX,4C
KMXd
public int get() { <tv"I-2
return queue[1]; BOme`0A
} ?>q5Abp[
SHQgI<D7
public void remove() { 8aI^vP"7`=
SortUtil.swap(queue,1,size--); -Xt0=3,
fixDown(1); ^-,@D+eW
} Nc*z?0wP
file://fixdown f\~A72-
private void fixDown(int k) { -o+; e3#
int j; ASa)xf9
while ((j = k << 1) <= size) { [#2X
if (j < size %26amp;%26amp; queue[j] j++; 5>>JQ2'W
if (queue[k]>queue[j]) file://不用交换 #0c;2}D
break; 1SG^X-(GM/
SortUtil.swap(queue,j,k); Rw|P$dbu
k = j; s,~g| I\
} h"dn:5G:=
} Na<);Pg
private void fixUp(int k) { ?pV!`vp^{
while (k > 1) { yUvn h
int j = k >> 1; 0A F}wz>
if (queue[j]>queue[k]) 6Ok]E`
break; lbC9^~T+
SortUtil.swap(queue,j,k); x<=R?4@rq
k = j; g5t`YcL
} .}n\c%&
} } ^WmCX2a
j"n"=rTTQ
} {Z#=ppvs
$j"BHpN
} c>BDw<
AL*M`m_
SortUtil： =gHUY&sPu8
SzyaVBD3
package org.rut.util.algorithm; 0lS=-am
Nq#B4Zx
import org.rut.util.algorithm.support.BubbleSort; ITfz/d8
import org.rut.util.algorithm.support.HeapSort; ?cB26Zrcb
import org.rut.util.algorithm.support.ImprovedMergeSort; {=9"WN
import org.rut.util.algorithm.support.ImprovedQuickSort; (1Klj+"p%
import org.rut.util.algorithm.support.InsertSort; dg4q+
import org.rut.util.algorithm.support.MergeSort; 7,FhKTV1/
import org.rut.util.algorithm.support.QuickSort; uEr['>
import org.rut.util.algorithm.support.SelectionSort; [BFPIVD)h]
import org.rut.util.algorithm.support.ShellSort; Uwg*kJ3H
&[kFl\
/** %wN*Hu~E
* @author treeroot 5-POYug
* @since 2006-2-2 C'a#.LM
* @version 1.0 lbMok/a2o
*/ iIc/%< ;
public class SortUtil { %nyZ=&u
public final static int INSERT = 1; u|75r%p>
public final static int BUBBLE = 2; sv2XD}}
public final static int SELECTION = 3; a6 w'.]m
public final static int SHELL = 4; d bHxc@H
public final static int QUICK = 5; 5?8jj
public final static int IMPROVED_QUICK = 6; &)!4rABn
public final static int MERGE = 7; f*Yr*yC
public final static int IMPROVED_MERGE = 8; !&R|P|7qN}
public final static int HEAP = 9; a=M/0N{!
)jm!^m
public static void sort(int[] data) { z~#d@c\
sort(data, IMPROVED_QUICK); =L*-2cE6#
} Z*YS7 ~
private static String[] name={ n,`j~.l-=>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EKNmXt1 lE
}; N[;R8SP
!YX_k<1E
private static Sort[] impl=new Sort[]{ 9}'92
new InsertSort(), :*eJ*(M
new BubbleSort(), ]BfJ~+ N
new SelectionSort(), b 4A1M
new ShellSort(), =jvL2ps<
new QuickSort(), `Af5%m[
new ImprovedQuickSort(), X08[,P#I
new MergeSort(), S+GW}?!
new ImprovedMergeSort(), )3)x/WM
new HeapSort() lFa?l\jLXZ
}; =,Z5F`d4
ow*^z78M{
public static String toString(int algorithm){ - @tL]]
return name[algorithm-1]; 7towjwr
} vCn\_Nu;W&
~=?^v[T1
public static void sort(int[] data, int algorithm) { a|Wrc)UR
impl[algorithm-1].sort(data); ^tI4FQ>Y
} t!o=-k
K9) |b`E=
public static interface Sort { d)L,kzN
public void sort(int[] data); rs,:pU
} >Zh^,T={G
i&0Zli
public static void swap(int[] data, int i, int j) { O&r9+r1`
int temp = data; VlS`m,:{
data = data[j]; M2LW[z
data[j] = temp; yZ,S$tSR
} {VKP&{~O
} ksF4m_E>YB