[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; 5vxKkk&i4l
} !%w#h0(b
int i1=l; D2hEI2S
int i2=mid+1; OPm?kr
for(int cur=l;cur<=r;cur++){ $xx5+A%,
if(i1==mid+1) 38Rod]\E
data[cur]=temp[i2++]; $7Sbz&)y3
else if(i2>r) si`{>e~`6P
data[cur]=temp[i1++]; @q=l H *=
else if(temp[i1] data[cur]=temp[i1++]; WY=RJe2
else W40GW
data[cur]=temp[i2++]; {8L)Fw
} 31BN ?q
} Y# <38+Gd
HbQvu@
} #Bo/1G=
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改进后的归并排序: m3|KIUP
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package org.rut.util.algorithm.support; @\~qXz{6J
!AR$JUnX
import org.rut.util.algorithm.SortUtil; 6Mpbmfr
r 5$(
/** B_f0-nKP
* @author treeroot m>po+7"b
* @since 2006-2-2 9ICC2%j|
* @version 1.0 fX.V+.rj
*/ ]>utLi5dX
public class ImprovedMergeSort implements SortUtil.Sort { ZqI.n4:9
x.>E7 +
private static final int THRESHOLD = 10; >{DHW1kF?
.3;bUJ1
/* @G/':N
* (non-Javadoc) $}[Tj0+:
* P1PP#>E-2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Salu[)+?
*/ [\9WqHs
public void sort(int[] data) { E\M{/.4 4
int[] temp=new int[data.length]; DNgQ.lV
mergeSort(data,temp,0,data.length-1); 1[k~*QS
} 9JF*xXd>Q
id^U%4J
private void mergeSort(int[] data, int[] temp, int l, int r) { ] o!#]]
int i, j, k; YK# QH"}
int mid = (l + r) / 2; #=WDJT:
if (l == r) V/j]UK0$
return; gto@o\&=
if ((mid - l) >= THRESHOLD) dEXHd@"H
mergeSort(data, temp, l, mid); uO$ujbWZ
else gbc^Lb
insertSort(data, l, mid - l + 1); ^q"wd?((h
if ((r - mid) > THRESHOLD) qA- ya6
mergeSort(data, temp, mid + 1, r); -t9oL3J
else %iPu51+=
insertSort(data, mid + 1, r - mid); B3I\=
?Y"bt^4j
for (i = l; i <= mid; i++) { d}f| HOFq
temp = data; ~A8%[.({5
} `Tzqvnn
for (j = 1; j <= r - mid; j++) { 5H6GZ:hp
temp[r - j + 1] = data[j + mid]; l3aG#4jj
} [7Nn%eZC
int a = temp[l]; UQ|zSalv,
int b = temp[r]; F"a^`E&
for (i = l, j = r, k = l; k <= r; k++) { PVO9KWv**
if (a < b) { YYI
data[k] = temp[i++]; $Z;HE/3
a = temp; <$liWAGX\
} else { 5iola}6
data[k] = temp[j--]; < %Qw dEO
b = temp[j]; FV/xp}nz
} da@y*TO#i
} 1{ #Xa=
} !2x"'o
|-7<?aw"
/** GS{:7%=j
* @param data 6RZ[X[R[}
* @param l v)JQb-<
* @param i \h^bOxh
*/ hMJ \a
private void insertSort(int[] data, int start, int len) { &QOob)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FH8?W| G
} _lQ+J=J$.R
} gB3&AQ
} 98C~%+
} [Hdk=p
K. G#[
堆排序： Y=G *[G#
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package org.rut.util.algorithm.support; 4qda!%
4x'^?0H@
import org.rut.util.algorithm.SortUtil; 1elx~5v1.=
=nnS X-x
/** yh_s(>sh
* @author treeroot I#l9
* @since 2006-2-2 %9mCgHQ9
* @version 1.0 Kw'Dzz%kN
*/ "!)8bTW
public class HeapSort implements SortUtil.Sort{ ,|I\{J #C
\Y9=dE}
/* (non-Javadoc) ^J>28Q\S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~E^EF{h
*/ gx[#@(
public void sort(int[] data) { M;MD-|U
MaxHeap h=new MaxHeap(); ?l,i(I
h.init(data); +bm2vIh$
for(int i=0;i h.remove(); hZlajky
System.arraycopy(h.queue,1,data,0,data.length); 6o;lTOes
} ]CC= \<
;_j\E(^%
private static class MaxHeap{ .WL507*"Ce
M _U$I7
void init(int[] data){ BHj]w*Ov
this.queue=new int[data.length+1]; F__>`Dol
for(int i=0;i queue[++size]=data; mS~3QV
fixUp(size); o\]e}+1[o
} ,h/0:?R KW
} cb%w,yXw
q){]fp.,@
private int size=0; 81W})q8
4BEVG&Ks
private int[] queue; >K\ 79<x|
cDs#5,
public int get() { SATZ!
return queue[1]; =|3L'cDC
} n+GCL+Mo
(%0X\zvu/
public void remove() { dc&Qi_W
SortUtil.swap(queue,1,size--); BpP\C!:^
fixDown(1); !+)$;`
} `*oLEXYN
file://fixdown n^Z?u9VR
private void fixDown(int k) { ;8 McG83
int j; PLLlo~Bb
while ((j = k << 1) <= size) { >4EcV1y
if (j < size %26amp;%26amp; queue[j] j++; SgXXitg9+
if (queue[k]>queue[j]) file://不用交换 r.ajw&J2
break; FeV=4tsy
SortUtil.swap(queue,j,k); cjN4U [
k = j; 7/7A
} Wq{'ZN
} 0[3b,
private void fixUp(int k) { 1}jE?{V*
while (k > 1) { BC$In!
int j = k >> 1; /v!H{Zw=c
if (queue[j]>queue[k]) &\p:VF.
break; %oor7 -l
SortUtil.swap(queue,j,k); g"Ii'JZ?
k = j; wFqz.HoB
} mOXI"q]p
} *znCe(dd
%Vt@7SwRJ
} n@mUQ6
_)Qt,$
} bfpW^y
xBw"RCBz^
SortUtil： *Mp<4B
U'lmQrF!
package org.rut.util.algorithm; dfJ7Dhn
Ej34^*m9k
import org.rut.util.algorithm.support.BubbleSort; a|s=d
import org.rut.util.algorithm.support.HeapSort; [\.>BK
import org.rut.util.algorithm.support.ImprovedMergeSort; gdG: &{|x
import org.rut.util.algorithm.support.ImprovedQuickSort; ))KsQJ"V
import org.rut.util.algorithm.support.InsertSort; 8dZH&G@;
import org.rut.util.algorithm.support.MergeSort; zIAMM
import org.rut.util.algorithm.support.QuickSort; 15eHddd
import org.rut.util.algorithm.support.SelectionSort; l%w7N9
import org.rut.util.algorithm.support.ShellSort; z:fhq:R(
U_8I$v-~
/** }bnkTC
* @author treeroot Xr)d;@yi
* @since 2006-2-2 pH~JPNng
* @version 1.0 `UJW:qqW
*/ v'@LuF'e8
public class SortUtil { ^#t<ILUa
public final static int INSERT = 1; SQ1&n;M}f
public final static int BUBBLE = 2; sIy$}_
public final static int SELECTION = 3; AMm O+E?
public final static int SHELL = 4; L+kS8D<
public final static int QUICK = 5; a0LX<}
public final static int IMPROVED_QUICK = 6; uBMNkN8
public final static int MERGE = 7; 87>Qw,r
public final static int IMPROVED_MERGE = 8; Bpp9I;)c
public final static int HEAP = 9; QV 'y6m\
AN1bfF:C
public static void sort(int[] data) { 7r;A wa
sort(data, IMPROVED_QUICK); '{u#:TTj
} kg@J.
private static String[] name={ .z4FuG,R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *oWzH_
}; <?7~,#AK
X'F$K!o*,:
private static Sort[] impl=new Sort[]{ Uh8ieb
new InsertSort(), Q$zlxn 7\
new BubbleSort(), vSL{WT]m
new SelectionSort(), h/VYH(Tj
new ShellSort(), CFA>
new QuickSort(), 1`AE]
new ImprovedQuickSort(), DtS{iH=s]
new MergeSort(), A3$b_i@P
new ImprovedMergeSort(), #3$|PM7,_
new HeapSort() 0`thND)?O
}; _ o(h]G1].
lyeoSd1AN
public static String toString(int algorithm){ Y'~&%|9+T
return name[algorithm-1]; c,fedH;
} [aC9vEso!
atAA[~
public static void sort(int[] data, int algorithm) { `->k7a0<b1
impl[algorithm-1].sort(data); '[E_7$d
} xr2:bu
}<S2W\,G
public static interface Sort { #lC{R^SL
public void sort(int[] data); x M[#Ah)
} \* #4
.KSGma6]
public static void swap(int[] data, int i, int j) { ?!66yn
int temp = data; M:$nL
data = data[j]; }.vy|^X
data[j] = temp; s#fmGe"8
} 9|m L
} X[ (J!"+