[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; 4l @)K9F
} AIZBo@xg
int i1=l; 'Cc(3
int i2=mid+1; d8OL!Rk
for(int cur=l;cur<=r;cur++){ ROdK8*jL
if(i1==mid+1) _^\$"nw
data[cur]=temp[i2++]; ][7p+IsB
else if(i2>r) XUmR{A
data[cur]=temp[i1++]; v(O=IUa
else if(temp[i1] data[cur]=temp[i1++]; lddp^ #f
else cdTsRS;E
data[cur]=temp[i2++]; XsL#;a C
} Vmi{X b]<
} ~uj;qq
YRcps0Dx9
} L*]0"E
Xy7Z38G
改进后的归并排序: vAi$[p*im
*>."V5{;S
package org.rut.util.algorithm.support; !')y&7a~
n]N96oD
import org.rut.util.algorithm.SortUtil; -F1- e+=
(OmH~lSO.
/** #YK5WTn5
* @author treeroot e@n!x}t8
* @since 2006-2-2 L?RF;jf
* @version 1.0 2R.2D'4)`
*/ UVEz;<5@\
public class ImprovedMergeSort implements SortUtil.Sort { J4aBPq`
xf,5R9g/
private static final int THRESHOLD = 10; W?XizTW
1*Ar{:+ua
/* `G$1n#&
* (non-Javadoc) BfmsMW
* k6**u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;[$n=VX`
*/ ry0%a[[
public void sort(int[] data) { EKZVF`L
int[] temp=new int[data.length]; A6"Hk0Hf
mergeSort(data,temp,0,data.length-1); }Je>;{&%
} :}q\tNY<
Ee2c5C!|C
private void mergeSort(int[] data, int[] temp, int l, int r) { JPx7EEkZR4
int i, j, k; ;#k-)m%
int mid = (l + r) / 2; ${hz e<g
if (l == r) <{J5W6
return; K :LL_,
if ((mid - l) >= THRESHOLD) SO?8%s(
mergeSort(data, temp, l, mid); <4`eQ
else P?ep]
insertSort(data, l, mid - l + 1); Re=WfG
if ((r - mid) > THRESHOLD) q4k@l
mergeSort(data, temp, mid + 1, r); x?yD=Mq_
else XbXA+ey6
insertSort(data, mid + 1, r - mid); 9#/(N#>
N{C;~'M2ce
for (i = l; i <= mid; i++) { H+C6[W=
temp = data; L;6.r3bL
} #AViM_u
for (j = 1; j <= r - mid; j++) { olYsT**'
temp[r - j + 1] = data[j + mid]; V H^AcO
} r':TMhzHq?
int a = temp[l]; :@3Wg3N
int b = temp[r]; E~hzh /,34
for (i = l, j = r, k = l; k <= r; k++) { slW3qRT\k
if (a < b) { T-" I9kM
data[k] = temp[i++]; "ZMkL)'7-
a = temp; ]MTbW=*}ED
} else { q/&y*)&'O
data[k] = temp[j--]; !|G(Yg7C
b = temp[j]; (lH,JX`$a
} USPTpjt8R
} ANMg
} ~H6;I$e[
\h{r;#g
/** |M~ON=
* @param data %y`7);.q
* @param l yy2I2Bv
* @param i LMl~yqM
*/ =y]$0nh
private void insertSort(int[] data, int start, int len) { &%C4Ugo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z;}6f
} wz /GB8P
} n(;:*<Rh
} mY&ud>,U:
} -uR72f
jUMf6^^
堆排序： xFFr
oQ2KW..q
package org.rut.util.algorithm.support; <:;^'x>!
HZ"Evl|n
import org.rut.util.algorithm.SortUtil; f-RK,#^?,
E;(Rm>lB
/** &Ral+J
* @author treeroot ;?L\Fz(<
* @since 2006-2-2 Tupiq
* @version 1.0 6XV<? 9q
*/ W?RE'QV8
public class HeapSort implements SortUtil.Sort{ pa]"iZz
L/r@ S'
/* (non-Javadoc) )@g;j>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2XSHZ|;
*/ e$/B_o7(
public void sort(int[] data) { u\e\'\
MaxHeap h=new MaxHeap(); zA+@FR?
h.init(data); !]?$f=
for(int i=0;i h.remove(); P\R27Jd
System.arraycopy(h.queue,1,data,0,data.length); g@v s*xE
} fP-|+TyO
dE=Ue#1U@5
private static class MaxHeap{ )ZR+lX}
%@J1]E;
void init(int[] data){ iU2KEqCm
this.queue=new int[data.length+1]; LLAa1Wq
for(int i=0;i queue[++size]=data; vA%^`5
fixUp(size); \F6LZZ2Lv
} j|_E$L A\
} l}g;'9ZB
(k"_># %
private int size=0; d5j_6X
h#}YKWL
private int[] queue; arZ@3]X%a
,TC;{ $O5
public int get() { x8#ODuH
return queue[1]; rP=sG;d
} 773/#c
{bNXedZ\
public void remove() { omX?Bl
SortUtil.swap(queue,1,size--); 8\ha@&p
fixDown(1); QBJ3iQs1
} j6}R7$JR
file://fixdown _%@=Uc6V
private void fixDown(int k) { x%> e)L<
int j; 90N`CXas
while ((j = k << 1) <= size) { mj,fp2D;%
if (j < size %26amp;%26amp; queue[j] j++; '?*g%Yuz
if (queue[k]>queue[j]) file://不用交换 F@<0s&)1
break; n-;y*kD
SortUtil.swap(queue,j,k); =bt]JRU
k = j; >`T5]_a
} ]> !<G8=N
} h1"zV6U
private void fixUp(int k) { deX5yrvOie
while (k > 1) { )h$NS2B`
int j = k >> 1; Vd9@Dy
if (queue[j]>queue[k]) <eN R8(P
break; 2ef;NC.&n
SortUtil.swap(queue,j,k); ,d,\-x-+/
k = j; dfj\RIV8
} 9l/EjF^
} gQWd&)'muf
D%/8{b:
} +SXIZ`
72db[
} i, nD5@#
Ju` [m
SortUtil： kAzd8nJ'
T)CzK<LbR
package org.rut.util.algorithm; ^(x^6d
<I*x0BM=
import org.rut.util.algorithm.support.BubbleSort; D$eB ,~
import org.rut.util.algorithm.support.HeapSort; jdqj=Yc
import org.rut.util.algorithm.support.ImprovedMergeSort; ctmQWrk|B
import org.rut.util.algorithm.support.ImprovedQuickSort; u62)QJE
import org.rut.util.algorithm.support.InsertSort; -#&kYK#Ph
import org.rut.util.algorithm.support.MergeSort; p#d+>7
import org.rut.util.algorithm.support.QuickSort; xBnbF[
import org.rut.util.algorithm.support.SelectionSort; Zf*r2t1&P
import org.rut.util.algorithm.support.ShellSort; ZFh+x@
%i{;r35M;9
/** *e"a0
* @author treeroot &%aXR A#+
* @since 2006-2-2 vlWw3>4
* @version 1.0 fp>.Owt%.
*/ B)SLG]72f
public class SortUtil { vFmJ;J
public final static int INSERT = 1; vxlOh.a|/L
public final static int BUBBLE = 2; wzcai 0y*
public final static int SELECTION = 3; USML~]G z
public final static int SHELL = 4; v[k5.\No
public final static int QUICK = 5; \&xl{64
public final static int IMPROVED_QUICK = 6; oUDVy_k
public final static int MERGE = 7; |VH!)vD
public final static int IMPROVED_MERGE = 8; !|wzf+V
public final static int HEAP = 9; eOlKbJU
|?m` xO
public static void sort(int[] data) { tV;%J4E'
sort(data, IMPROVED_QUICK); HaNboYW_K
} /)|X.D
private static String[] name={ v@ C,RP9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7()?C}Ni-
}; h+UnZfm
,8Iv9M}2
private static Sort[] impl=new Sort[]{ m 40m<@
new InsertSort(), 6)RbPPeE
new BubbleSort(), &M&{yc*%
new SelectionSort(), A]`:VC=IU
new ShellSort(), j}HFs0<L
new QuickSort(), <_S@6?
new ImprovedQuickSort(), |lQ;ALH!
new MergeSort(), {kB `>VS
new ImprovedMergeSort(), 2i=H"('G)+
new HeapSort() PK6iY7Qp)
}; #} ,x @]p
X!,@j\L
public static String toString(int algorithm){ P~CrtTss
return name[algorithm-1]; pJpNO$$w
} Gy29MUF
!R{R??
public static void sort(int[] data, int algorithm) { 5OLQw(E
impl[algorithm-1].sort(data); ReB7vpd
} F}?<v8#z0
x4?10f(9=
public static interface Sort { Jn}n*t3
public void sort(int[] data); dJ3IUe
} {[G`Z9]z&-
$K}. +`vVO
public static void swap(int[] data, int i, int j) { ('k<XOi
int temp = data; @M;(K<%h
data = data[j]; ".2K9j7$
data[j] = temp; f_mhD dq
} .QWhK|(.!
} =jAFgwP\