[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; 1d,;e:=j
} hT]\*},
int i1=l; > -OQk"o
int i2=mid+1; #}3$n/
for(int cur=l;cur<=r;cur++){ WbB0{s
if(i1==mid+1) se2ay_<F+
data[cur]=temp[i2++]; X2v|O3>/N
else if(i2>r) @#xh)"}
data[cur]=temp[i1++]; blEs!/A`
else if(temp[i1] data[cur]=temp[i1++]; {dTtYL$'"
else @|sDb?J
data[cur]=temp[i2++]; A70x+mjy^T
} =y.?=`"
} |p}qK Fdi
/z9oPIJ=*
} QE1DTU
#**vIwX-Q
改进后的归并排序: 2Ck'A0d
bd_&=VLTC
package org.rut.util.algorithm.support; d#'aTmu!
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import org.rut.util.algorithm.SortUtil; i{vM NI{
eTw sh]
/** v47Y7s:uQ
* @author treeroot B_$hi=?TTd
* @since 2006-2-2 ~RgO9p(dY
* @version 1.0 UsP1bh4
*/ \4zb9CxOZ
public class ImprovedMergeSort implements SortUtil.Sort { O0[.*xG
5srj|'ja
private static final int THRESHOLD = 10; Hx5t![g2K!
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/* )%FRBO]
* (non-Javadoc) b\&|030+
* ?VaWOwWI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lky{<jZ%
*/ K=nW|^
public void sort(int[] data) { mWN9/+!
int[] temp=new int[data.length]; 4EQ-48h17
mergeSort(data,temp,0,data.length-1); .sCi9d WR
} V/"P};n
x=s=~cu4,
private void mergeSort(int[] data, int[] temp, int l, int r) { 5F&xU$$a-
int i, j, k; b+7!$
int mid = (l + r) / 2; Y=94<e[f"
if (l == r) no).70K
return; M@%$9N)gd
if ((mid - l) >= THRESHOLD) `tZm
mergeSort(data, temp, l, mid); V}_M\Y^^;
else \-i5b
insertSort(data, l, mid - l + 1); vy&q7EX<i
if ((r - mid) > THRESHOLD) ;c};N(2
mergeSort(data, temp, mid + 1, r); zI1-l9 o
else Qv4g#jX{
insertSort(data, mid + 1, r - mid); D_VAtz
Twl>Pn>
for (i = l; i <= mid; i++) { !A@Ft}FB
temp = data; jr,j1K@_t
} OcWy#,uC
for (j = 1; j <= r - mid; j++) { t{A/Lq9AM
temp[r - j + 1] = data[j + mid]; gK7bP'S8H
} St 4YNS.|
int a = temp[l]; O{@m,uY
int b = temp[r]; >AFX}N#
for (i = l, j = r, k = l; k <= r; k++) { :56f
if (a < b) { Ut|G.%1Vd%
data[k] = temp[i++]; SY&)?~C
a = temp; ,-({m'
} else { :70n%3a
data[k] = temp[j--]; bUJ5jkZ)
b = temp[j]; 5^:N]Mp"
} fZ8at
} z;fi
} %uA\Le
[(Jj@HlP6T
/** GBMCw
* @param data SI-G7e)3;>
* @param l {6E&\
* @param i r92C^h0
*/ @-9u;aL
private void insertSort(int[] data, int start, int len) { HH`G/(a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (rDB|kc^7
} T;{M9W+
} c^Y&4=>T
} wlvhDJ
} e[`u:
Qqju6}+
堆排序： P01o:/}
{-FS+D`
package org.rut.util.algorithm.support; ^dc~hD
YTWlR]Tr6?
import org.rut.util.algorithm.SortUtil; ~x}/>-d
>'\cNM~nf
/** mI;#Zq_j
* @author treeroot X0IXj%\N
* @since 2006-2-2 ?<7o\Xk#{
* @version 1.0 KB3zQJY
*/ 8Df(|>mK
public class HeapSort implements SortUtil.Sort{ TttD}`\.
+aa( YGL
/* (non-Javadoc) Yr7%C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iPnu *29
*/ EUxkYl
public void sort(int[] data) { Av3qoH)[<
MaxHeap h=new MaxHeap(); $%*E)~
h.init(data); e~Hx+Qp.G
for(int i=0;i h.remove(); '1o1=iJN@$
System.arraycopy(h.queue,1,data,0,data.length); ,sU#{.(
} ">?ocJ\9
c(:qid
private static class MaxHeap{ +1`Zu$|
qJ\tc\
void init(int[] data){ g(9\r
this.queue=new int[data.length+1]; kB`t_`7f
for(int i=0;i queue[++size]=data; P[|FK(l
fixUp(size); ^g[,}t:/d
} u2p5*gzZ
} ~[E@P1
aahAUhF
private int size=0; auzrM4<tz
}PdHR00^
private int[] queue; +W=
q '6gj
public int get() { $M `%A
return queue[1]; iGCA>5UE
} a-P'h1hbH
"ZuhN(-`
public void remove() { {|{}]B
SortUtil.swap(queue,1,size--); y(I_ 6+B^
fixDown(1); ]{` 8C
} M!KHBr
file://fixdown 8UAbTqB-
private void fixDown(int k) { ulcm
int j; X<6Ro es2
while ((j = k << 1) <= size) { co <ATx
if (j < size %26amp;%26amp; queue[j] j++; <ZF,3~v?
if (queue[k]>queue[j]) file://不用交换 F0cde
break; %TO=]>q
SortUtil.swap(queue,j,k); %D::$,;<<
k = j; ^iWcuh_n
} }8+rrzMUB
} kPh;SCr{
private void fixUp(int k) { R`7v3{
while (k > 1) { hWzjn5w3
int j = k >> 1; 2<Vw :+,
if (queue[j]>queue[k]) ;=&D_jGf]
break; TB=KTj
SortUtil.swap(queue,j,k); T?p'R
k = j; gnAM}
} sn|q EH
} qNhV zx
!^o(?1
} 6##}zfl
D4CN%^?
} >g):xi3qK
+Lq;0tRC
SortUtil： VxlK:*t`
994
package org.rut.util.algorithm; ."N`X\
x2P}8Idg?A
import org.rut.util.algorithm.support.BubbleSort; 3' HtT
import org.rut.util.algorithm.support.HeapSort; /3MTutM|<X
import org.rut.util.algorithm.support.ImprovedMergeSort; lnXb]tm;
import org.rut.util.algorithm.support.ImprovedQuickSort; pt"yJtM'P
import org.rut.util.algorithm.support.InsertSort; qbrf;`
import org.rut.util.algorithm.support.MergeSort; fB\+.eN
import org.rut.util.algorithm.support.QuickSort; q\PHA
import org.rut.util.algorithm.support.SelectionSort; DXbzl +R
import org.rut.util.algorithm.support.ShellSort; eSV_.uvsb
[1I>Bc&o*
/** (r&e|
* @author treeroot QuJ~h}k
* @since 2006-2-2 {nyQ]Nu"
* @version 1.0 KNR_upO8
*/ .zm'E<
public class SortUtil { RVlAWw(
public final static int INSERT = 1; |FF"vRi8a7
public final static int BUBBLE = 2; l7rGz2:?
public final static int SELECTION = 3; ~2R3MF.C
public final static int SHELL = 4; %]>LnbM>4
public final static int QUICK = 5; r_sZw@lqJ
public final static int IMPROVED_QUICK = 6; *O`76+iZ|_
public final static int MERGE = 7; ?;\xeFy!
public final static int IMPROVED_MERGE = 8; (-lu#hJ`&r
public final static int HEAP = 9; N8$MAW
/xK5%cE>B
public static void sort(int[] data) { O@.afk"{
sort(data, IMPROVED_QUICK); nm[ yp3B
} ##%R|P3
private static String[] name={ ,zCrix 3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u )'l|Y
}; P#_8$#G3
B3p[A k
private static Sort[] impl=new Sort[]{ j Hd<*
new InsertSort(), %-zAV*>
new BubbleSort(), 8vN}v3HV&
new SelectionSort(), fO!S^<9,-
new ShellSort(), #3:;&@#
new QuickSort(), ]Q}z-U
new ImprovedQuickSort(), |( %3'"Z
new MergeSort(), wH:'5+u:6
new ImprovedMergeSort(), 2>s@2=Aq
new HeapSort() YNGG> ;L
}; Ov vM)?^#
>s@6rNgf
public static String toString(int algorithm){ Cm4$&?
return name[algorithm-1]; GJ>vL
} 8}Pd- .se
fk(l.A$
public static void sort(int[] data, int algorithm) { OG#7Va
impl[algorithm-1].sort(data); [zO
} HJY_l
{J:ZM"GS
public static interface Sort { uUAib<wdPL
public void sort(int[] data); ~=t,g S
} 7\'ow|)}v
IN? A`A
public static void swap(int[] data, int i, int j) { 4<`x*8` ,
int temp = data; fo"dX4%}
data = data[j]; u9AXiv+K
data[j] = temp; 'E/vE0nN?
} m"B)%?C#
} 2<$C6J0HM