[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; ,f?B((l
} 7,?ai6{
int i1=l; 7|Wst)_~j
int i2=mid+1; ]3]B$
for(int cur=l;cur<=r;cur++){ .8'uIA{_2
if(i1==mid+1) 32j#kJW
data[cur]=temp[i2++]; 9ec#'i=
else if(i2>r) 753gcY#i
data[cur]=temp[i1++]; .3XSF$;
else if(temp[i1] data[cur]=temp[i1++]; 07(LLhk@d
else t=:5?}J.Q$
data[cur]=temp[i2++]; $Sm iN'7;
} uJ1oo| sn
} u@Ni *)p`
1:DA{ejS
} 4Rp[>}L
}(na)B{m
改进后的归并排序: (IHR {m
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package org.rut.util.algorithm.support; 1z,P"?Q
Um-Xb'R*]V
import org.rut.util.algorithm.SortUtil; x>K,{{B)X
QDK }e:4q
/** 6PWw^Cd
* @author treeroot P?8$VAkj
* @since 2006-2-2 D}ZPgt#
* @version 1.0 !q/Q2N(
*/ BdvpG
public class ImprovedMergeSort implements SortUtil.Sort { y{P~!Yn|
8<6@O
private static final int THRESHOLD = 10; d[;&2Jz*
%[L/JJbP&Z
/* &R<K>i
* (non-Javadoc) HDE5Mg "
* ]d|M@v~c4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R5},E
*/ O#8lJ%?
public void sort(int[] data) { CAA3-"Cwi
int[] temp=new int[data.length]; Y!(w.G
mergeSort(data,temp,0,data.length-1); 7oL:C
} (o\D=!a
4w 7vgB
private void mergeSort(int[] data, int[] temp, int l, int r) { .",BLuce
int i, j, k; b?M. 0{"H
int mid = (l + r) / 2; D iHj!tZN
if (l == r) $`C$|9S
return; cI7aTLC"s
if ((mid - l) >= THRESHOLD) }LWrtmc
mergeSort(data, temp, l, mid); :.-KM7tDI1
else - ikq#L){
insertSort(data, l, mid - l + 1); :de4Fje/4y
if ((r - mid) > THRESHOLD) n34d"l3
mergeSort(data, temp, mid + 1, r); h^{aG])
else I[06R
insertSort(data, mid + 1, r - mid); 2of+KI:
Dn>C :YS`
for (i = l; i <= mid; i++) { .lz=MUR
temp = data; +).=}.k
} >k}Kf1I
for (j = 1; j <= r - mid; j++) { }g2l ni
temp[r - j + 1] = data[j + mid]; G" (ck4
} *li5/=UC5*
int a = temp[l]; +&1#ob"6lq
int b = temp[r]; -)ri,v{:c
for (i = l, j = r, k = l; k <= r; k++) { ']X0g{%
if (a < b) { m[N&UM#
data[k] = temp[i++]; q.ppYXJUXi
a = temp; 6UPGE",u
} else { 6iH]N*]S^
data[k] = temp[j--]; etb#/L
b = temp[j]; ' #t1e]
} JQ]MkP
} [#:yOZt
} p5nrPL
tKi^0vE8
/** <V8=*n"mR
* @param data gi? wf
* @param l |Y+[_D}
* @param i [Fd[(
*/ *unJd"<*&@
private void insertSort(int[] data, int start, int len) { _z"\3hZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z= pvoTY
} PB{5C*Y7^k
} DxP65wU
} :|ytw=3>
} l2LO,j}
7'{Y7]+z+
堆排序： H Mfhe[A?
^g+M=jq _
package org.rut.util.algorithm.support; ef:Zi_o
!-B|x0fs
import org.rut.util.algorithm.SortUtil; }OgZZ8-_M
ab_EH}j1\q
/** vb\R~%@T,
* @author treeroot f(-3d*g
* @since 2006-2-2 d\ Xijy
* @version 1.0 dpcv'cRfw
*/ r?Pk}Q
public class HeapSort implements SortUtil.Sort{ 4?x$O{D5?{
&y2DI"Ff
/* (non-Javadoc) x Sv@K5"8!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MWn[]'TpH
*/ =vKSvQP@)
public void sort(int[] data) { bxww1NG>|Z
MaxHeap h=new MaxHeap(); sQ82(N7l
h.init(data); 4}^\&K&t{
for(int i=0;i h.remove(); # 9ZO1\
System.arraycopy(h.queue,1,data,0,data.length); _^w^tfH]
} X5P1wxk'
RJOyPZ]
private static class MaxHeap{ P76QHBbl
=I)Ex)
void init(int[] data){ _M[T8"e(
this.queue=new int[data.length+1]; (ZK(ODn)i
for(int i=0;i queue[++size]=data; Biy$p6
fixUp(size); `lE8dwL
} L?hWH0^3
} }RkD7
x#tP)5n?s*
private int size=0; &PEw8: TX
eJZt&|7N
private int[] queue; )G$0:-J-
M7AUY#)
public int get() { ::k/hP9.^
return queue[1]; n{.SNipU
} }{)>aJ
0hju@&Aa
public void remove() { AkV8}>G?#A
SortUtil.swap(queue,1,size--); Y/n],(t)
fixDown(1); '$be+Z32
} ljO t~@Ea
file://fixdown 3C;nC?]K
private void fixDown(int k) { JwmH_nJ(
int j; 4kf8Am(
while ((j = k << 1) <= size) { \&X*-T[]j
if (j < size %26amp;%26amp; queue[j] j++; E#+|.0*!s
if (queue[k]>queue[j]) file://不用交换 +C9l7 q
break; G(7WUMjl
SortUtil.swap(queue,j,k); 9GVv[/NAb
k = j; C%kIxa)
} #j${R={
} C?VNkBJ>\
private void fixUp(int k) { d}]jw4
while (k > 1) { Qw/H7fvh&
int j = k >> 1; Q2!vO4!<N
if (queue[j]>queue[k]) >[gNQJ6
break; gLPgh%B4
SortUtil.swap(queue,j,k); s4{>7`N2
k = j; +,ojlTVlt
} vBjrI*0
} wO ?A/s
,qO2D_
} ^ Nm!b
r4Jc9Tvd
} Y**|e4
zvnR'\A_
SortUtil： .uu[MzMIu
XSz)$9~hk
package org.rut.util.algorithm; ~i/K7qZ
.Zv uhOn^
import org.rut.util.algorithm.support.BubbleSort; Q96^rjY
import org.rut.util.algorithm.support.HeapSort; iwT PJGK|
import org.rut.util.algorithm.support.ImprovedMergeSort; ;R{ffS6
import org.rut.util.algorithm.support.ImprovedQuickSort; "iTi+UZxe
import org.rut.util.algorithm.support.InsertSort; jr=erVHK
import org.rut.util.algorithm.support.MergeSort; f8836<c
import org.rut.util.algorithm.support.QuickSort; _+2Jc}Yf
import org.rut.util.algorithm.support.SelectionSort; H{j jA+0
import org.rut.util.algorithm.support.ShellSort; E?[]N[0Kl
,[<+7
/** @a}jnl(2
* @author treeroot n|f Huv
* @since 2006-2-2 +yo1&b R/
* @version 1.0 =F"vL
*/ z;ko )
public class SortUtil { eUE(vn#
public final static int INSERT = 1; '?MT"G
public final static int BUBBLE = 2; $^j#z^7
public final static int SELECTION = 3; /L? ia
public final static int SHELL = 4; 2io~pk>
public final static int QUICK = 5; MF/@Efjn ]
public final static int IMPROVED_QUICK = 6; tEHgQto
public final static int MERGE = 7; ae|j#!~oi
public final static int IMPROVED_MERGE = 8; K/ 5U;oC
public final static int HEAP = 9; 1=Nh<FuQ
9&}i[x4
public static void sort(int[] data) { DDwm;,eZ
sort(data, IMPROVED_QUICK); N.@@ebuE
} 1A.ecv'
private static String[] name={ I&G"{Dl94
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?."YP[;
}; ~V6wcXd
n(tx'&U"R
private static Sort[] impl=new Sort[]{ L:E?tR}H
new InsertSort(), eT6T@C](
new BubbleSort(), FA3YiX(-e
new SelectionSort(), /[RO>Z9
new ShellSort(), Cmj+>$')0
new QuickSort(), jM!Q 04(
new ImprovedQuickSort(), 3r-oZ8/n
new MergeSort(), $;%k:&\f
new ImprovedMergeSort(), Th>ff)~e
new HeapSort() G"|`&r@
}; lLi)?
K)[DA*W
public static String toString(int algorithm){ %{HeXe
return name[algorithm-1]; DA wUG
} 8*Ke;X~N
|g,99YIv>
public static void sort(int[] data, int algorithm) { Js}1_K
impl[algorithm-1].sort(data); pa8R;A70Dl
} R7ze~[oF
J_rb3
public static interface Sort { I$HO[Z!
public void sort(int[] data); g?i0WS
} "9bd;Tt:
{~cM 6W]f
public static void swap(int[] data, int i, int j) { :ExCGS[
int temp = data; NY3.?@Z
data = data[j]; "1HKD
data[j] = temp; qe<aJn
} ^M6R l0
} %"CF-K@th