[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; Xh@;4n
} IubzHf
int i1=l; z LZHVvL3
int i2=mid+1; ?$.x%G+
for(int cur=l;cur<=r;cur++){ cf%aOHYI*
if(i1==mid+1) 8f>v[SQ"
data[cur]=temp[i2++]; <['ucp
else if(i2>r) d"OYq
data[cur]=temp[i1++]; 3hfv^H
else if(temp[i1] data[cur]=temp[i1++]; 5,9cD`WR^
else (&Mv!6]
data[cur]=temp[i2++]; K)GpQ|4:<
} ?^WX]SAl
} 5V8`-yO9
S~U5xM^s
} OlX#1W]
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改进后的归并排序: -q&7q
X/FRe[R
package org.rut.util.algorithm.support; V(;c#%I2
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import org.rut.util.algorithm.SortUtil; CPcB17!
X3HJ3F;==
/** %J+k.UrM
* @author treeroot uvJmEBL:
* @since 2006-2-2 V\=%u<f
* @version 1.0 py$i{v%
*/ xtK}XEhG!
public class ImprovedMergeSort implements SortUtil.Sort { 6\USeZh
@?5pY^>DK
private static final int THRESHOLD = 10; 11RqP:zg
L'O=;C"f
/* zICAV -&
* (non-Javadoc) DaqlL
* oF_ '<\ly=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;i!$rL
*/ <K <|G
public void sort(int[] data) { ?MOjtAG0_~
int[] temp=new int[data.length]; )i[K1$x2
mergeSort(data,temp,0,data.length-1); 0u bf]Z
} SK5__Ix
)3^#CD
private void mergeSort(int[] data, int[] temp, int l, int r) { vHN/~k#
int i, j, k; F]cc?r312
int mid = (l + r) / 2; &?# YjU"
if (l == r) #>2cfZ`6'J
return; LBIEG_/m
if ((mid - l) >= THRESHOLD) l $0w 9Z^
mergeSort(data, temp, l, mid); _ME?o
else lL&p?MUp
insertSort(data, l, mid - l + 1); <7o@7r'0
if ((r - mid) > THRESHOLD) WS"v"J%
mergeSort(data, temp, mid + 1, r); ,{d=<j_
else h<i.Z7F;tj
insertSort(data, mid + 1, r - mid); 2=$ F*B>9
\O)u' Bu
for (i = l; i <= mid; i++) { 2{S*$K[M
temp = data; .}Hs'co
} \zzPsnFIg
for (j = 1; j <= r - mid; j++) { c 6/lfgN
temp[r - j + 1] = data[j + mid]; q#`;G,rs
} S+l>@wa)|
int a = temp[l]; 6C!TXV'
int b = temp[r]; jF-0fK;)*
for (i = l, j = r, k = l; k <= r; k++) { c3*9{Il^
if (a < b) { +/rh8?
data[k] = temp[i++]; 3iw.yR
a = temp; g_)i)V
} else { F6"QsFG
data[k] = temp[j--]; =z'533C
b = temp[j]; m Gx{Vpt
} 4MRN{W6
} mxICQ>s b
} 1-PFM-
W=4|ahk$
/** Lbu,VX
* @param data .jl^"{@6
* @param l !'-./LD")
* @param i H%;pPkIi
*/ Tj=@5lj0
private void insertSort(int[] data, int start, int len) { PMe3Or@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @'"7[k!y;
} lr$,=P`
} )6 K)UA
} ?uXY6J"
} Z|j\_VKhl
p7[&H/
堆排序： a KIS%M#Y
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package org.rut.util.algorithm.support; 0$|wj^?U
,&jjpeZP
import org.rut.util.algorithm.SortUtil; 10*^
C3b<Wa])
/** e)oi3d.wJf
* @author treeroot Hr/J6kyB)
* @since 2006-2-2 Z$S0X$q}
* @version 1.0 B|SX?X
*/ E#n:d9WA:
public class HeapSort implements SortUtil.Sort{ f0g&=k{OD
\8`^QgV`@
/* (non-Javadoc) kp*BAQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H}lbF0`
*/ aq8mD^j-&
public void sort(int[] data) { t_Ul;HVPS
MaxHeap h=new MaxHeap(); +Q!Kj7EU/
h.init(data); (ewcj\l4*
for(int i=0;i h.remove(); IXsOTBM
System.arraycopy(h.queue,1,data,0,data.length); "~T06!F45
} <"`P;,S
!&o>zU.
private static class MaxHeap{ =A;79@bY
j4h?"
void init(int[] data){ ; .hTfxE0
this.queue=new int[data.length+1]; ]v.Yt/&C{
for(int i=0;i queue[++size]=data; /!-ypIY
fixUp(size); e_Q(l'f
} AmcBu"
} L'a>D
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private int size=0; K_V$ktL
yJw4!A 1!
private int[] queue; ;+Mr|vweTC
DkBVk+
public int get() { e3kdIOu5
return queue[1]; IE&G7\>(yO
} [q!)Y:|u_>
< !]7Gt
public void remove() { AI2>{V
SortUtil.swap(queue,1,size--); VM"*@T
fixDown(1); 7s1LK/R|u
} NjSjE_S2B8
file://fixdown Fprhu;h
private void fixDown(int k) { 6 i]B8Ziq{
int j; {1W,-%
while ((j = k << 1) <= size) { %$F\o1S
if (j < size %26amp;%26amp; queue[j] j++; sUsIu,1Q
if (queue[k]>queue[j]) file://不用交换 V_pKe~
break; m`8tHHF
SortUtil.swap(queue,j,k); G)\6W#de4
k = j; 'w}/o+x@
} znd fIt^
} YQ5d!a.
private void fixUp(int k) { [RHji47
while (k > 1) { YCNpJGM
int j = k >> 1; XwdehyPhT2
if (queue[j]>queue[k]) ys|};*
break; <(caY37o6)
SortUtil.swap(queue,j,k); #:/-8Z(0
k = j; Xr pnc7
} ,U'E!?=:VS
} x<{)xP+|
%:[Y/K-
} w~VqdB
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} 7 *HBb-
(+0yZ7AZ
SortUtil： wGnFDkCNz
u/L\e.4
package org.rut.util.algorithm; )9>E} SU/
)rv<"
import org.rut.util.algorithm.support.BubbleSort; 84maX'
import org.rut.util.algorithm.support.HeapSort; k'+Mc%pg4E
import org.rut.util.algorithm.support.ImprovedMergeSort; PiwI.c
import org.rut.util.algorithm.support.ImprovedQuickSort; !:Clzlg
import org.rut.util.algorithm.support.InsertSort; Q GDfX_
import org.rut.util.algorithm.support.MergeSort; kM/;R)3t4/
import org.rut.util.algorithm.support.QuickSort; ;923^*\:F{
import org.rut.util.algorithm.support.SelectionSort; >zB0+l
import org.rut.util.algorithm.support.ShellSort; I?i,21:5
JV9Ft,xk
/** X.!|#FWb+
* @author treeroot e5fzV.'5
* @since 2006-2-2 $9O%,U@
* @version 1.0 lDhuL;9e
*/ }K\m.+%=d
public class SortUtil { < 5#}EiT5
public final static int INSERT = 1; { Sn J
public final static int BUBBLE = 2; SiSxym
public final static int SELECTION = 3; <3c|S_|L*m
public final static int SHELL = 4; 1]Gp\P}
public final static int QUICK = 5; NI?YUhg>
public final static int IMPROVED_QUICK = 6; p=8?hI/bim
public final static int MERGE = 7; |#-GH$.v
public final static int IMPROVED_MERGE = 8; 4 g^oy^~
public final static int HEAP = 9; }z8HS< #Q
>vY5%%}
public static void sort(int[] data) { j /=4f�
sort(data, IMPROVED_QUICK); .[4Dvt|>6
} "+:IA|1wD
private static String[] name={ Se-n#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "#a,R^J
}; DnW*q/=w
_m|Tr*i8
private static Sort[] impl=new Sort[]{ l@ W?qw
new InsertSort(), Gfn?1Kt{
new BubbleSort(), ?_7^MP>
new SelectionSort(), itW~2#nJz
new ShellSort(), 4Fpu68y
new QuickSort(), 'w5g s}1D
new ImprovedQuickSort(), p8Wik<'^
new MergeSort(), MUd 9R
new ImprovedMergeSort(), _-/<bO
new HeapSort() vL"[7'
}; fbK`A?5K
LdM9k(
public static String toString(int algorithm){ F[5\ x0
return name[algorithm-1]; gT~Yn~~b
} ;nB.f.e`
@fxDe[J:
public static void sort(int[] data, int algorithm) { @Iy&Qo
impl[algorithm-1].sort(data); )~l`%+
} @-QDp`QtI
1#<KZN =$
public static interface Sort { VaRP+J}UA.
public void sort(int[] data); N/&t)7
} 41V}6+$g
+Qe&#"O0
public static void swap(int[] data, int i, int j) { '+cPx\4
int temp = data; THbV],RhJ
data = data[j]; q!P{a^Fnc
data[j] = temp; qKd&d
} @"=wn:O+
} B> LL *