[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; kOh{l: 2-+
} 5|jw^s7
int i1=l; #v<QbA
int i2=mid+1; a{{g<<H
for(int cur=l;cur<=r;cur++){ keB&Bjd&
if(i1==mid+1) UQB"v3Z
data[cur]=temp[i2++]; a33TPoj
else if(i2>r) Duc#$YfGm
data[cur]=temp[i1++]; pZtu&R%GU
else if(temp[i1] data[cur]=temp[i1++]; dnj}AVfQx
else vDH>H^9Y
data[cur]=temp[i2++]; ?B:a|0pf
} 'Ysx=
} R'S0 zp6
hAHq\
} 97ql5
Z!U)I-x&
改进后的归并排序: M`ip~7"
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package org.rut.util.algorithm.support; y#XbJuN/
}#X8@
import org.rut.util.algorithm.SortUtil; It{;SKeo
[,TkFbDq"J
/** qL,tYJ<m%
* @author treeroot wC5ee:u C%
* @since 2006-2-2 1UKg=A-q
* @version 1.0 C`5
*/ OK\A</8r
public class ImprovedMergeSort implements SortUtil.Sort { w: >5=mfk
Y[L-7^o@y
private static final int THRESHOLD = 10; =b/L?dR.-
-&<Whhs.@
/* A<W6=5h
* (non-Javadoc) ?2>FdtH
* y.[Mnj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'Y]mOD^p
*/ kYLM&&h
public void sort(int[] data) { 8>7&E-
int[] temp=new int[data.length]; "_`F\DGAZu
mergeSort(data,temp,0,data.length-1); $^@)
} y~75r\"R
QcgfBsv96
private void mergeSort(int[] data, int[] temp, int l, int r) { |jM4E$
int i, j, k; Dgy]ae(Hb3
int mid = (l + r) / 2; [ :zO}r:
if (l == r) )KP5WudX
return; F{UP;"8'
if ((mid - l) >= THRESHOLD) e@IA20
mergeSort(data, temp, l, mid); d9q(xZ5
else :H c0b=
insertSort(data, l, mid - l + 1); 5|1T}Z#;
if ((r - mid) > THRESHOLD) /tUy3myJ
mergeSort(data, temp, mid + 1, r); i\dc>C ;
else 3\Xbmq8}
insertSort(data, mid + 1, r - mid); 0Q^Ikiv
CxfRVL`7
for (i = l; i <= mid; i++) { hXA6D)
temp = data; Aj0Tfdxy
} sVl-N&/
for (j = 1; j <= r - mid; j++) { VZ\B<i
temp[r - j + 1] = data[j + mid]; A,`8#-AX
} VqS#waNrx
int a = temp[l]; kcQ'$<Mz<
int b = temp[r]; FXs*vg`
for (i = l, j = r, k = l; k <= r; k++) { 4n4?4BEn
if (a < b) { hiUD]5Kp
data[k] = temp[i++]; 0@EwM
a = temp; D_x+:1(
} else { 4T=u`3pD7l
data[k] = temp[j--]; kV38`s>+
b = temp[j]; N2w"R{)j\
} 3"P }n
} 5sb\r,kW
} eQ&ZX3*}
. Z%{'CC
/** 8KRba4[
* @param data f/V 2f].
* @param l 7P9=)$(EH
* @param i 1Uqu>'
*/ ,dx3zBI
private void insertSort(int[] data, int start, int len) { $_x^lr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !=N"vD*
} fXcm|U,ho
} Lliqj1&
} N"3b{Qio
} $ >EYhLBa
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堆排序： aAB`G3
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package org.rut.util.algorithm.support; q#8[
0q'w8]m
import org.rut.util.algorithm.SortUtil; L>YU,I\o
PpgP&;z4
/** lhkwWbB
* @author treeroot [B|MlrZ
* @since 2006-2-2 9[^gAR
* @version 1.0 d,=r9.
*/ q5#J~n8Wr
public class HeapSort implements SortUtil.Sort{ B:+6~&,-
c.j$9=XLBG
/* (non-Javadoc) ,JEFGI{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D)d~3`=#
*/ >>5NX"{
public void sort(int[] data) { ;W^o@*i{>
MaxHeap h=new MaxHeap(); #cCL.p"]
h.init(data); Q_Gi]M9
for(int i=0;i h.remove(); /IM#.v
System.arraycopy(h.queue,1,data,0,data.length); |P%DkM*X
} #/Eb*2C`b
W]5USFan
private static class MaxHeap{ TqddOp
y8rm
void init(int[] data){ /<]{KI
this.queue=new int[data.length+1]; ?G-e](]^<
for(int i=0;i queue[++size]=data; _C`K*u 6Z<
fixUp(size); sUU{fNC6|
} x(eb5YS
} 1SR+m>pL
r}jGUe}d
private int size=0; k0Uyf~p~
!H}vu]R
private int[] queue; t>[KVVg W
(4Zts0O\
public int get() { /\WQxe
return queue[1]; <0PT"ij
} ,.qMEMm
F 3'9u#
public void remove() { H `(exa:w
SortUtil.swap(queue,1,size--); $O dCL
fixDown(1); T"0,r$3:
} L_K=g_]
file://fixdown $.[#0lCI
private void fixDown(int k) { pe{;~-|6
int j; y})70w@+_
while ((j = k << 1) <= size) { g=$1cC+(
if (j < size %26amp;%26amp; queue[j] j++; ''Cay0h
if (queue[k]>queue[j]) file://不用交换 ,qYJioWX
break; eR3$i)5
SortUtil.swap(queue,j,k); ?|ZTaX6A
k = j; ti<;7Yb
} f0BdXsV#g
} ^J\~XYg{7
private void fixUp(int k) { `8Lo{P
while (k > 1) { Z%n(O(^L
int j = k >> 1; ZE/o?4k*c1
if (queue[j]>queue[k]) )uqA(R>
break; F<(i.o(
SortUtil.swap(queue,j,k); Z%x\~)~
k = j; ]hbyELs
} -%I2[)F<
} B0ndcB-
QQV~?iW{~
} al[n,u
X 51Yfr
} iT)z_
T0]*{k(FR
SortUtil： xSBc-u#< G
eVM/uDD
package org.rut.util.algorithm; dF~8XYo
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import org.rut.util.algorithm.support.BubbleSort; /mK?E5H'r1
import org.rut.util.algorithm.support.HeapSort; _Y[jyD1>
import org.rut.util.algorithm.support.ImprovedMergeSort; 56Vb+0J'
import org.rut.util.algorithm.support.ImprovedQuickSort; G2^et$<{uU
import org.rut.util.algorithm.support.InsertSort; 4NdN<#Lr
import org.rut.util.algorithm.support.MergeSort; jr3ti>,xV
import org.rut.util.algorithm.support.QuickSort; w/IZDMBf|
import org.rut.util.algorithm.support.SelectionSort; Vo"RO$%ow*
import org.rut.util.algorithm.support.ShellSort; +|ycvHd
_BDK`D
/** +tD[9b! m
* @author treeroot hsw9(D>jp
* @since 2006-2-2 e A}%C.ZR
* @version 1.0 O1`9Y}G(r
*/ d`/tE?Gw
public class SortUtil { G7CG~:3h+
public final static int INSERT = 1; zH*KYB
public final static int BUBBLE = 2; %zOh
public final static int SELECTION = 3; d%0~c'D8a
public final static int SHELL = 4; Ogp"u b8
public final static int QUICK = 5; \~5C7^_
public final static int IMPROVED_QUICK = 6; S*sT] J`!
public final static int MERGE = 7; !Lh^oPT"I
public final static int IMPROVED_MERGE = 8; DzheoA-+L'
public final static int HEAP = 9; %DQhM,c@
Q8_ d)t|
public static void sort(int[] data) { cDI [PJ9
sort(data, IMPROVED_QUICK); &wB\ ~Ie-
} :(H>2xS,s
private static String[] name={ Zx d~c]n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z?O*'#yn
}; {b@KYR9K
Glpe/At
private static Sort[] impl=new Sort[]{ D3x/OyG(
new InsertSort(), q@jq0D)g
new BubbleSort(), k`x=D5s\
new SelectionSort(), YOJ6w
new ShellSort(), |qoKO:B4-[
new QuickSort(), /P 2[:[w
new ImprovedQuickSort(), )<xypDQ
new MergeSort(), &< !Ufa&
new ImprovedMergeSort(), 2r6'O6v
new HeapSort() A'%1ZQ33O
}; hbcuK&
_fwb!T}$
public static String toString(int algorithm){ h/,${,}J
return name[algorithm-1]; JO@|*/mL
} LE%7DW(
_H^^y$+1
public static void sort(int[] data, int algorithm) { W'on$mB5<
impl[algorithm-1].sort(data); -D^}S"'
} Kb^>-[Yx
>[1W:KQA
public static interface Sort { 2>l,no39t+
public void sort(int[] data); ZoB{x*IH
} \t|M-%&)4
NzW`B^p
public static void swap(int[] data, int i, int j) { NxLXm,
int temp = data; /CIh2 ]#e
data = data[j]; XhPe]P
data[j] = temp; g%k`
} P(a.iu5
} w\19[U3