[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; VBoMT:#
} ]7sx;KFv
int i1=l; B,$l4m4
int i2=mid+1; \v@({nB8
for(int cur=l;cur<=r;cur++){ n[xkSF^)
if(i1==mid+1) +%J\y^09kr
data[cur]=temp[i2++]; W@L3+4
else if(i2>r) \jW)Xy
data[cur]=temp[i1++]; hi{%pi&!T
else if(temp[i1] data[cur]=temp[i1++]; qcB){p+UQ
else 3EFD%9n
data[cur]=temp[i2++]; n/e BE q
} :bM+&EP
} Z%o7f6P0IX
'3tw<k!1{.
} Lf}8qB#Y
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改进后的归并排序: ^z1IN-Tm/
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package org.rut.util.algorithm.support; >}+Q:iNQ)2
Q ~|R Z7G
import org.rut.util.algorithm.SortUtil; Os),;W0w4
@_'OyRd8
/** JV"NZvjN7d
* @author treeroot vL_zvXA
* @since 2006-2-2 -<f/\U
* @version 1.0 F%.xuLW
*/ 'E]A.3-Mt
public class ImprovedMergeSort implements SortUtil.Sort { </oY4$l'
$`Nd?\$
private static final int THRESHOLD = 10; N{akg90
'UwI*EW2S
/* oN2=DYC41
* (non-Javadoc) z MdC
* I=dGq;Jaz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y).P=z
*/ LVtu*k
public void sort(int[] data) { R"xp%:li
int[] temp=new int[data.length]; 9w^zY;Y
mergeSort(data,temp,0,data.length-1); Ueyw;Y
} z_SagU,\
6vz1*\:H~
private void mergeSort(int[] data, int[] temp, int l, int r) { m@qqVRn#)
int i, j, k; Agy <j
int mid = (l + r) / 2; vE\lp8j+
if (l == r) q^Tis>*u6
return; 3{J.xWB@:
if ((mid - l) >= THRESHOLD) iyM^[/-R6
mergeSort(data, temp, l, mid); mN1Ssq"B
else }C6@c1myq-
insertSort(data, l, mid - l + 1); av'*u
if ((r - mid) > THRESHOLD) Q_P5MLU>
mergeSort(data, temp, mid + 1, r); :EHQ .^
else _vrWj<wyf
insertSort(data, mid + 1, r - mid); 9{eBgdC
RsSXhPk?
for (i = l; i <= mid; i++) { |O (G nsZ
temp = data; Vewzo1G2
} %?tq;~|]Q
for (j = 1; j <= r - mid; j++) { 4#rAm"H
temp[r - j + 1] = data[j + mid]; &hN,xpC
} b7$}JCn
int a = temp[l]; gue(C(~.k_
int b = temp[r]; ki4f*Ej
for (i = l, j = r, k = l; k <= r; k++) { XVUf,N,
if (a < b) { :R+],m il
data[k] = temp[i++]; \iZ1W
a = temp; -9G]x{>
} else { nFXAF!,jj
data[k] = temp[j--]; `"Dy%&U
b = temp[j]; f5?hnt`m
} dF,DiRD
} yX9B97XyC
} E~He~wHWe
;BTJ%F.
/** H1Xovr
* @param data $FCw$+w
* @param l . bG{T|
* @param i v MWC(m
*/ \Da~p9T&
private void insertSort(int[] data, int start, int len) { b\L)m (
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MVAc8dS
} %+8
} Oxn'bh6R0
} ngqUH
} m|dF30~A
XI g|G}i.
堆排序： '#f?#(
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package org.rut.util.algorithm.support; ^'Zh;WjI7
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import org.rut.util.algorithm.SortUtil; }rxFS <j
[NR1d-Wg
/** riEqW}{
* @author treeroot /O"0L/hc^
* @since 2006-2-2 H2]BMkum
* @version 1.0 UJs?9]x>
*/ nK:`e9ES
public class HeapSort implements SortUtil.Sort{ YD+QX@
<^'{ G
/* (non-Javadoc) A?V<l<EAm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %>NRna
*/ bl9E&B/
public void sort(int[] data) { % NwoU%q
MaxHeap h=new MaxHeap(); c$.T<r)Z
h.init(data); A3!2"}L
for(int i=0;i h.remove(); "U{mMd!9L
System.arraycopy(h.queue,1,data,0,data.length); F13%)G(
} b6$4Ul-.
&:,fb]p
private static class MaxHeap{ g&8.A(
KKMWD\
void init(int[] data){ otZ JY)
this.queue=new int[data.length+1]; ;WPI+`-
for(int i=0;i queue[++size]=data; Ut=0~x.=<
fixUp(size); F6h/0i
} B)(w%\M4^
} zkvH=wL
n/:Z{
private int size=0; _c,&\ wl$
?##y`.+O
private int[] queue; 0$(jBnE
T)*l' g'
public int get() { %k~C-+
return queue[1]; /Ir 7 DZK
} fG^7@Jw:G
]*;RHy9
public void remove() { @)8NI[=6O
SortUtil.swap(queue,1,size--); o<Ke3?J\
fixDown(1); :K5V/-[|V1
} i$2MjFC-
file://fixdown (p'/p
private void fixDown(int k) { Gu<W:n[
int j; qrOB_Nz
while ((j = k << 1) <= size) { </~1p~=hAt
if (j < size %26amp;%26amp; queue[j] j++; bK6, saN>
if (queue[k]>queue[j]) file://不用交换 "1E?3PFJ
break; :^C#-O
SortUtil.swap(queue,j,k); %YsRm%q
k = j; oKZ[0(4<
} 6B4hSqjh
} $=X!nQ& Z|
private void fixUp(int k) { &4a~6
while (k > 1) { *(>F'>F1"
int j = k >> 1; ~r7DEy|+
if (queue[j]>queue[k]) $v2S;UB v*
break; pU[a[
SortUtil.swap(queue,j,k); z0FR33-
k = j; \r)_-
} gogl[gHO
} !^rITiy
+A;n*DF2
} R A-^!4tX
#h}IUR
} `XFX`1
Vw6>:l<+<
SortUtil： (Qw`%B
0$Qn#K
package org.rut.util.algorithm; ([z<TS#Md
c9>8IW
import org.rut.util.algorithm.support.BubbleSort; m&;zLBA;
import org.rut.util.algorithm.support.HeapSort; KR+aY.
import org.rut.util.algorithm.support.ImprovedMergeSort; bs4fyb
import org.rut.util.algorithm.support.ImprovedQuickSort; hv_pb#1Ks
import org.rut.util.algorithm.support.InsertSort; Z)b)v
import org.rut.util.algorithm.support.MergeSort; t\E-6u
import org.rut.util.algorithm.support.QuickSort; !ds"88:5^
import org.rut.util.algorithm.support.SelectionSort; [v>Z(
import org.rut.util.algorithm.support.ShellSort; AOq9v~)z-
{g23[$X]N
/** ~50y-
* @author treeroot QZz{74]n
* @since 2006-2-2 kfG65aa>_
* @version 1.0 ^+Y-=2u:
*/ +)''l
public class SortUtil { -X6\[I:+A
public final static int INSERT = 1; ?3KR(6D
public final static int BUBBLE = 2; )SlUQ7f>
public final static int SELECTION = 3; hc31+TL
public final static int SHELL = 4; 071E%u,
public final static int QUICK = 5; : Oz7R:
public final static int IMPROVED_QUICK = 6; ?Sd~u1w8K
public final static int MERGE = 7; hIg, 0B
public final static int IMPROVED_MERGE = 8; (,)vak&t
public final static int HEAP = 9; GYy!`E
OL6xMToP
public static void sort(int[] data) { (Mire%$h
sort(data, IMPROVED_QUICK); }tS6Z:fOY
} 0ga1Yr]
private static String[] name={ WEY97_@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aZ`_W|
}; 6{,K7FL
7.Kjg_N#Tr
private static Sort[] impl=new Sort[]{ O'yjB$j
new InsertSort(), ^|hRu{QW
new BubbleSort(), \Z7([Gh
new SelectionSort(), q4#f *]
new ShellSort(), 8BoT%kVeJv
new QuickSort(), ^:rNoo
new ImprovedQuickSort(), "3>*i!i
new MergeSort(), #Ot*jb1
new ImprovedMergeSort(), ?}lpo; $
new HeapSort() *~lgU4
}; zL!~,B8C
,mBKya)
public static String toString(int algorithm){ 2ZzD^:V[}
return name[algorithm-1]; q MT.7n:
} O]r3?=
Gk]qE]hi
public static void sort(int[] data, int algorithm) { >a`zkl
impl[algorithm-1].sort(data); A%czhF
} Hk~ gcG
CTrs\G
public static interface Sort { 'rq#q)1MT
public void sort(int[] data); =rO>b{,hs
} #* /W!UOu
I3rnCd(
public static void swap(int[] data, int i, int j) { He_(JXTP
int temp = data; !7a^8
data = data[j]; sq6%=(q(?
data[j] = temp; JLV}Fw
} 1S.e5{
} S%gO6&^