[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; H~c+L'=
} {PHxm
int i1=l; ybtje=3E
int i2=mid+1; }6P]32d
for(int cur=l;cur<=r;cur++){ /q%TjQ}F
if(i1==mid+1) .E_`*[ 5=
data[cur]=temp[i2++]; K \}xb2s
else if(i2>r) _Gy*";E
data[cur]=temp[i1++]; '}c0:,5
else if(temp[i1] data[cur]=temp[i1++]; t_YiF%}s&#
else 3\FiQ/?
data[cur]=temp[i2++]; ;o\0:fzr
} [IxZweK
} #(@dN+
1$fA9u$
} apUV6h-v
mp~\ioI*d
改进后的归并排序: ushQWP)
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package org.rut.util.algorithm.support; Nuk\8C
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import org.rut.util.algorithm.SortUtil; EOV<|WF>
=o=)EU{~
/** =,I,K=+_x
* @author treeroot vKDPg p<j
* @since 2006-2-2 8oY0?|_Bx
* @version 1.0 {S\cpCI`
*/ C+}uH:I'L
public class ImprovedMergeSort implements SortUtil.Sort { Z{RgpVt
hNFMuv
private static final int THRESHOLD = 10; Dw{C_e
yPm)r2Ck
/* xYM!mcA
* (non-Javadoc) SZc6=^$
* _y`'T;~OY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A0S6 4(
*/ 94W9P't
public void sort(int[] data) { -4b9(
int[] temp=new int[data.length]; Yc#oGCt
mergeSort(data,temp,0,data.length-1); XaD}J:Xq
} BZsw(l4/0'
0;e>kz3o
private void mergeSort(int[] data, int[] temp, int l, int r) { Cs%'Af
int i, j, k; Y&k'4Y%
int mid = (l + r) / 2; 2`t4@T
if (l == r) x&)P)H0vn
return; 4MRHz{`wa
if ((mid - l) >= THRESHOLD) CN: 36
mergeSort(data, temp, l, mid); <s-_ieW'
else ? Z8_(e0U
insertSort(data, l, mid - l + 1); @8@cpm
if ((r - mid) > THRESHOLD) >'Nrvy%&0
mergeSort(data, temp, mid + 1, r); 4|Jy]
else +S|y)W8
insertSort(data, mid + 1, r - mid); E](Ood
w0moC9#$?
for (i = l; i <= mid; i++) { _}`iLA!$I
temp = data; y{K~g<VL
} ?{cF'RB.
for (j = 1; j <= r - mid; j++) { [ OMcSd|nf
temp[r - j + 1] = data[j + mid]; 34]f[jJ|
} ZWmmFKFG.
int a = temp[l]; BWL~)Hx
int b = temp[r]; qVJV9n
for (i = l, j = r, k = l; k <= r; k++) { J_U1eSz<j
if (a < b) { |!I#T
data[k] = temp[i++]; ^fS~va
a = temp; ,_YCl09p(
} else { LUKdu&M
data[k] = temp[j--]; UX2`x9
b = temp[j]; N+!{Bt*
} -YHlVz
} ,/:#=TuYm
} l$d4g?Z
d'^jekh
/** |;{wy
* @param data .'+Tnu(5q
* @param l $CHri|
* @param i 1>57rx"l
*/ bbiDY
private void insertSort(int[] data, int start, int len) { $}W=O:L+D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;% !'K~
} %S.R@C[3
} GRO[&;d`
} +n^$4f
} Y'bDEdeT
"=9L7.E)
堆排序： -UPdgZ_Vxz
OyZgg(iN
package org.rut.util.algorithm.support; G+^HZ4jg
.\{GU9|nO
import org.rut.util.algorithm.SortUtil; hXbb+j
N$>g)Ml?
/** q+e'=0BHd:
* @author treeroot R(r89bTQ
* @since 2006-2-2 bNY_V;7Kw`
* @version 1.0 ~;il{ym
*/ *Yl9%x]3c
public class HeapSort implements SortUtil.Sort{ "J%u !~
<d$|~qS_
/* (non-Javadoc) LurBqr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h&[]B*BLr
*/ M<~z=B#
public void sort(int[] data) { ~naL1o_FZ
MaxHeap h=new MaxHeap(); ];Bh1
h.init(data); yXR$MT+~
for(int i=0;i h.remove(); ^C_Y[i ~|
System.arraycopy(h.queue,1,data,0,data.length); HWFo9as""v
} #{UM4~|:
Y%|f<C)lx2
private static class MaxHeap{ VoWlBH
^l7u^j
void init(int[] data){ 4[Hf[.
this.queue=new int[data.length+1]; C{-e(G`Yd
for(int i=0;i queue[++size]=data; . sgV
fixUp(size); -+#\WB{AI
} 29 Yg>R!/
} ^yu0Veypy
p_)V@7
private int size=0; +VI2i~
vv"_u=H
private int[] queue; #l+U(zH:JG
xQ^zX7
public int get() { $3W[fC
return queue[1]; k^S=i_ U
} bh3}[O,L A
u! x9O8y
public void remove() { +i4S^B/8i
SortUtil.swap(queue,1,size--); #fRhG^QKp
fixDown(1); 4nXS}bWf
} I|n<B"Q6^
file://fixdown Q(T)s
private void fixDown(int k) { y5RcJM
int j; /al(=zf
while ((j = k << 1) <= size) { @'/\O-
if (j < size %26amp;%26amp; queue[j] j++; 1<\@i{;xsU
if (queue[k]>queue[j]) file://不用交换 M0S}-eXc5
break; pD eqBO
SortUtil.swap(queue,j,k); ZXFM_>y5
k = j; 506B=
} zVd2kuI&?
} U_wn/wcLS
private void fixUp(int k) { S}cpYjnH8
while (k > 1) { jY('?3
int j = k >> 1; fJH09:@^%
if (queue[j]>queue[k]) w\:-lXw
break; :0Rd )*k,v
SortUtil.swap(queue,j,k); u-qg9qXJb
k = j; 7(QRG\G#
} FL,jlE_
} kBS;SDl)
g>1yQ
} |-e*^|
gG>1
} 2+s_*zM-
zy"L%i
SortUtil： X2}\i5{
5IOOVYl
package org.rut.util.algorithm; `{gkL-
lQ<2Vw#Yl
import org.rut.util.algorithm.support.BubbleSort; C5CUMYU
import org.rut.util.algorithm.support.HeapSort; IgI*mDS&b
import org.rut.util.algorithm.support.ImprovedMergeSort; j#f+0
import org.rut.util.algorithm.support.ImprovedQuickSort; N/p9Ws
import org.rut.util.algorithm.support.InsertSort; 0k@4;BYu
import org.rut.util.algorithm.support.MergeSort; &BY%<h0c
import org.rut.util.algorithm.support.QuickSort; ryB^$Kh,,
import org.rut.util.algorithm.support.SelectionSort; eB%KXPhMm
import org.rut.util.algorithm.support.ShellSort; AE={P*g
%g5TU 6WP
/** w9rwuk
* @author treeroot h3Nwxj~E
* @since 2006-2-2 ms{:=L2$$
* @version 1.0 Kyt.[" p
*/ 1XSA3;ZEc
public class SortUtil { &Gp@,t
public final static int INSERT = 1; A[ 9 @:z
public final static int BUBBLE = 2; W2D^%;mw
public final static int SELECTION = 3; CC0@RU
public final static int SHELL = 4; 5|my}.TR
public final static int QUICK = 5; J;W(}"cFq
public final static int IMPROVED_QUICK = 6; gbsRf&4h
public final static int MERGE = 7; @zL)R b%P$
public final static int IMPROVED_MERGE = 8; ! @{rkp
public final static int HEAP = 9; "w9LQ=mW
W=c7>s0>
public static void sort(int[] data) { Nwr.mtvh
sort(data, IMPROVED_QUICK); :3^b>(W.
} 11glFe
private static String[] name={ %<lfe<;^t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (%}T\~`1z#
}; 0#pjfc `:
kTb.I;S
private static Sort[] impl=new Sort[]{ W$B&asO
new InsertSort(), *;"N kCf
new BubbleSort(), bY|%ois4
new SelectionSort(), #+N\u*-S
new ShellSort(), bE#=\kf|
new QuickSort(), 1t_$pDF}
new ImprovedQuickSort(), hb9e6Cc
new MergeSort(), Gtd!Y x
new ImprovedMergeSort(), )xX(Et6+`
new HeapSort() "nPmQ
}; %C\Q{_AS
QZB2yK3]h
public static String toString(int algorithm){ 9yH95uaDF
return name[algorithm-1]; ` wuA}v3!
} \{AxDk{z#
M>D 3NY[,
public static void sort(int[] data, int algorithm) { |RDmY!9&
impl[algorithm-1].sort(data); T)&J}^j
} 2.ud P
kT@RA}
public static interface Sort { ,DK|jf
public void sort(int[] data); ;ZHKTOoK
} "D}PbT[V
9_h3<3e
public static void swap(int[] data, int i, int j) { 5!$m3j_,]?
int temp = data; O{zY(`[
data = data[j]; C7[ge&
data[j] = temp; jCDZ$W89
} _QbLg"O
} mr6/d1af_