[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; !eGC6o}f
} E:,/!9n
int i1=l; sv2A-Dld
int i2=mid+1; Q1T$k$n
for(int cur=l;cur<=r;cur++){ IDad9 Bx
if(i1==mid+1) kVuUjP6(c
data[cur]=temp[i2++]; fJ=0HNmX
else if(i2>r) sSr&:BOsi
data[cur]=temp[i1++]; 5us:adm[pD
else if(temp[i1] data[cur]=temp[i1++]; Z|&MKG24
else ^3G{|JB!+
data[cur]=temp[i2++]; kYM~d07 V
} ^\hG"5#
} \q>bs|2
F6LH $C
} -zCH**y%1
lz/8
改进后的归并排序: =h-U
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package org.rut.util.algorithm.support; DMAIM|h
T"(&b~m2b4
import org.rut.util.algorithm.SortUtil; _no/F2>!/n
hnffz95
/** TCMCK_SQL
* @author treeroot +Te\H
* @since 2006-2-2 I!ED?n
* @version 1.0 <!&[4-;fU
*/ HNb/-e ,"
public class ImprovedMergeSort implements SortUtil.Sort { ud63f`W]4
JL`-0P<M
private static final int THRESHOLD = 10; z$&{:\hj
~jWn4 \
/* @CNi{. RX
* (non-Javadoc) #{6{TFx\
* l?\jB\,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rbul8(1h
*/ Z@yW bjE7Z
public void sort(int[] data) { ]dF ,:8
int[] temp=new int[data.length]; 9G9t" {
mergeSort(data,temp,0,data.length-1); ?Lx24*5%
} |{&{
d}OTO10
private void mergeSort(int[] data, int[] temp, int l, int r) { gLb`pCo/
int i, j, k; 2ElJbN#
int mid = (l + r) / 2; UI0(=>L
if (l == r) ;RH;OE,A
return; a`wc\T^
if ((mid - l) >= THRESHOLD) FW;m\vu
mergeSort(data, temp, l, mid); Z EQ@IS:Y
else W1WYej"
insertSort(data, l, mid - l + 1); 4%{,] q\p
if ((r - mid) > THRESHOLD) zp6C3RG(
mergeSort(data, temp, mid + 1, r); S\^Pha q
else 32(^Te]:
insertSort(data, mid + 1, r - mid); oF vfCrd
]v?@g:iE
for (i = l; i <= mid; i++) { #./fY;:cj
temp = data; -Sqz5lo
} $&Gu)4'+
for (j = 1; j <= r - mid; j++) { ?(xnSW@r
temp[r - j + 1] = data[j + mid]; LY+@o<>
} C2.HMgL
int a = temp[l]; .7O*pJ2(H
int b = temp[r]; 0q^>ZF-@
for (i = l, j = r, k = l; k <= r; k++) { Zj_b>O-V
if (a < b) { # '=a=8-$
data[k] = temp[i++]; jY&k
a = temp; uY0lR:|
} else { T!uM+6|Y
data[k] = temp[j--]; Lk|hQ
b = temp[j]; !zBhbmlKt
} =WyDp97@+
} {0r0\D>bw
} V[mT<Lc
2v:]tj
/** Pi=+/}
* @param data ;$HftG>B
* @param l x-XD.qh7Hr
* @param i Z~GL5]S
*/ -7SAK1c$
private void insertSort(int[] data, int start, int len) { 1eA7>$w}[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RXNn[A4xfY
} fAF1"4f
} S2E8Gq9
} GeI-\F7b
} Cwr~HY
_ "E$v&_
堆排序： {M3qLf~z#C
K~uXO
package org.rut.util.algorithm.support; !H#bJTXB
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import org.rut.util.algorithm.SortUtil; r`$OO,W
ht|z<XJ
/** T=<@]$?
* @author treeroot '-QwssE
* @since 2006-2-2 02Y]`CXj
* @version 1.0 M\vwI"
*/ Cmu@4j&
public class HeapSort implements SortUtil.Sort{ iky|Tp
w?3p';C
/* (non-Javadoc) PYiU_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) md=TjMaY
*/ JELTou
public void sort(int[] data) { \$R_YKGf1G
MaxHeap h=new MaxHeap(); {]*c29b>
h.init(data); o\BOL3H
for(int i=0;i h.remove(); LI'6R=
System.arraycopy(h.queue,1,data,0,data.length); :v0U|\j8/V
} 16w|O|^<
,k.3|aZE
private static class MaxHeap{ B{/R: Hm
R$v[!A+:'
void init(int[] data){ >~#yu&*D
this.queue=new int[data.length+1]; B`YTl~4
for(int i=0;i queue[++size]=data; LU \i0|i|
fixUp(size); #r$cyV!k
} ks&*O!h
} Ki4r<>\l{H
F7A=GF'
private int size=0; )(A]Ln4
q6@Lp^f
private int[] queue; $:BKzHmg
l~1Oef#y
public int get() { &]g}u5J!=
return queue[1]; m];]7uB5=
} ,ly\Ka?zO
=FlDb 5t{
public void remove() { Z|%_&M
SortUtil.swap(queue,1,size--); r~E=4oB7
fixDown(1); XywE1}3
} #[,IsEpDO1
file://fixdown %]Fd[pzF
private void fixDown(int k) { 1=r#d-\tR
int j; 4Fa~Aog
while ((j = k << 1) <= size) { "C}b%aO:
if (j < size %26amp;%26amp; queue[j] j++; Hek*R?M|
if (queue[k]>queue[j]) file://不用交换 UXeN8
break; ;"KJ7p
SortUtil.swap(queue,j,k); mkMq
k = j; yu;+o3WlK
} WeJl4wF
} ` w=>I
private void fixUp(int k) { cT<1V!L4
while (k > 1) { %huRsQ%}
int j = k >> 1; +Um( h-;
if (queue[j]>queue[k]) WgR).Yx
break; ,f<?;z
SortUtil.swap(queue,j,k); vmi+_]
k = j; DD7h^-x
} $g@=Z"
} xRJ\E }/7
M.Y~1c4f
} S\LkL]qx
*Tas`WA
} yGI;ye'U
#~#R-
SortUtil： ~F7-HaQJ
uYn_? G
package org.rut.util.algorithm; ;ZH3{
U [*FCD!~
import org.rut.util.algorithm.support.BubbleSort; qT,Te
import org.rut.util.algorithm.support.HeapSort; fg s!v7
import org.rut.util.algorithm.support.ImprovedMergeSort; 5"^en# ?9
import org.rut.util.algorithm.support.ImprovedQuickSort; :imW\@u
import org.rut.util.algorithm.support.InsertSort; ?QsQnQ
import org.rut.util.algorithm.support.MergeSort; 'GB.UKlR
import org.rut.util.algorithm.support.QuickSort; YbR!+ 0\g
import org.rut.util.algorithm.support.SelectionSort; +lm{Olm'^
import org.rut.util.algorithm.support.ShellSort; Fa?~0H/DL
RwKdxK+;
/** Mc=$/ o
* @author treeroot OJ,`
* @since 2006-2-2 uPhK3nCGo
* @version 1.0 34z"Pm
*/ io _1Y]N
public class SortUtil { -!q:p&c
public final static int INSERT = 1; x8wD0D
public final static int BUBBLE = 2; GU4'&#
public final static int SELECTION = 3; ~s% Md
public final static int SHELL = 4; q_TRq:&.
public final static int QUICK = 5; MTsM]o
public final static int IMPROVED_QUICK = 6; ?: N@!jeJ
public final static int MERGE = 7; Hx#;Z
public final static int IMPROVED_MERGE = 8; ahuGq'
public final static int HEAP = 9; ?/BqD;{?I
wr5AG<%(
public static void sort(int[] data) { +s(HOq)b
sort(data, IMPROVED_QUICK); &]8P1{
} 4 K!JQ|9
private static String[] name={ r) HHwh{9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !LggIk1
}; 'L 8n-TyL
}&/o'w2wY
private static Sort[] impl=new Sort[]{ qo p^;~
new InsertSort(), B$-R-S6
new BubbleSort(), &7<TAo;O
new SelectionSort(), `JOOnTenQ
new ShellSort(), yXz*5W_0D
new QuickSort(), P=7zs;k
new ImprovedQuickSort(), ^.KwcXr
new MergeSort(), ?>hPO73{
new ImprovedMergeSort(), ~kShq%
new HeapSort() "*m_> IU
}; uZM{BgXXD
3 N.~mR
public static String toString(int algorithm){ F=`AY^u0
return name[algorithm-1]; /h+8A',
} s1=X>'q
:QpuO1Gu
public static void sort(int[] data, int algorithm) { [p{#XwN
impl[algorithm-1].sort(data); s8wmCzB~
} 61.Brp.eP
J!0DR4=Xi
public static interface Sort { xgbJ2Mh
public void sort(int[] data); ^=T$&gD
} g,}_G3[j0m
^oVs+vC
public static void swap(int[] data, int i, int j) { |s"nM<ZNZ
int temp = data; Nd`%5%'::
data = data[j]; !;0U,!WI
data[j] = temp; EKA#|^Q:NX
} cVubb}ou
} ,u!*2cWN