[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; :*I#n
} Y\D!/T
int i1=l; n`#tKwWHYx
int i2=mid+1; N(;1o.~
for(int cur=l;cur<=r;cur++){ ,vr? 2k
if(i1==mid+1) HJ9Kz^TnC
data[cur]=temp[i2++]; t_o['F
else if(i2>r) SEo'(-5
data[cur]=temp[i1++]; tI`Q/a5@
else if(temp[i1] data[cur]=temp[i1++]; BBaQ}{F8>2
else urbp#G/>
data[cur]=temp[i2++]; vmU@^2JSJ
} Z?6%;n^ 54
} @3) (BpFe
qyZ" %Kz
} |t^E~HLm,
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改进后的归并排序: >=qf/K+#
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package org.rut.util.algorithm.support; O8+7g+J=!
b,5~b&<h
import org.rut.util.algorithm.SortUtil; ohRjvJ'v|
q3mJ782p]
/** bn#"?6Z2
* @author treeroot 8NxM4$nQX
* @since 2006-2-2 TITKj?*o
* @version 1.0 L9r8BK;
*/ J*r*X.
public class ImprovedMergeSort implements SortUtil.Sort { ?Y$JWEPJ
?iw!OoZ`
private static final int THRESHOLD = 10; P0SQr?W
A#K14Ayr
/* VQ(jpns5
* (non-Javadoc) gT3_RUF
* };mA^xO]j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vp#JS3Y
*/ E-4b[xNj*+
public void sort(int[] data) { 6hw=
int[] temp=new int[data.length]; |ax3sAg
mergeSort(data,temp,0,data.length-1); Ghu#XJB?
} h`]Iy
&b.=M>\9Q
private void mergeSort(int[] data, int[] temp, int l, int r) { F0pir(n-
int i, j, k; [glLre^
int mid = (l + r) / 2; 35A|BD)q
if (l == r) ?8I?'\F;
return; Us)Z^s
if ((mid - l) >= THRESHOLD) 8LyD7P1\
mergeSort(data, temp, l, mid); R]vV*
else KxI&G%z
insertSort(data, l, mid - l + 1); DH[p\Wy'
if ((r - mid) > THRESHOLD) mi=Q{>rb
mergeSort(data, temp, mid + 1, r); iNWw;_|1
else ed]=\Key
insertSort(data, mid + 1, r - mid); viW!,QQ(S
yg`j-9[8
for (i = l; i <= mid; i++) { {}>0e:51
temp = data; f~t:L,\,
} ^?-:'<4q$
for (j = 1; j <= r - mid; j++) { Ye\rB\-
temp[r - j + 1] = data[j + mid]; S{Kiy#ltWc
} &c`nR<
int a = temp[l]; ?274uAO'
int b = temp[r]; /1Qr#OJ(]
for (i = l, j = r, k = l; k <= r; k++) { qaqBOHI6G
if (a < b) { ]S&&|Fc
data[k] = temp[i++]; i)o2klIkB
a = temp; 7yG#Z)VE
} else { zbXI%
data[k] = temp[j--]; cW~}:;D4
b = temp[j]; }'5MK
} dWM'fg
} *!4Z#Y
} rK@8/?y5
vV'EZ?
/** ob+b<HFv
* @param data aB*Bz]5;E
* @param l 5<iV2Hx
* @param i )mI05
*/ }Q)#[#e
private void insertSort(int[] data, int start, int len) { ~t@cO.c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \6S7T$$ 1m
} &X`C%h
} a_[Eh fE
} \(J8#V
} %OtFHhb
Bp*K]3_
堆排序： &Q9qq~
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package org.rut.util.algorithm.support; bADnW4N`6;
8J*"%C$qe
import org.rut.util.algorithm.SortUtil; TIx|L
[=x[ w70
/** Jz?j[
* @author treeroot ;5wn67'
* @since 2006-2-2 `Y+J-EQ
* @version 1.0 o=u3&liBi
*/ >lmi@UN|k
public class HeapSort implements SortUtil.Sort{ $[9%QQk5<L
n+! AnKq
/* (non-Javadoc) Gn22<C/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E_gD:PPU5
*/ t![7uU.W
public void sort(int[] data) { fs|)l$Rd
MaxHeap h=new MaxHeap(); UN7EF/!Zz
h.init(data); zUDg&-J3
for(int i=0;i h.remove(); V@\gS"Tu
System.arraycopy(h.queue,1,data,0,data.length); 'QG xd!4
} SIe="YG]<
/;{P}-H`ei
private static class MaxHeap{ l+3[ KCE
*xc_k"\
void init(int[] data){ h~A/y!s
this.queue=new int[data.length+1]; *zNYZ#
for(int i=0;i queue[++size]=data; V @rI`~$
fixUp(size); %`k6w3qI
} [l:x'_y
} VJ84?b{c W
pb^i^tA+A
private int size=0; m9)p-1y@5
6f;fx}y
private int[] queue; 3yANv?$a
-1Jg?cPzk
public int get() { +O'3|M
return queue[1]; gwNq x"
} z_g~
^m L@e'r
public void remove() { yhlFFbU
SortUtil.swap(queue,1,size--); OL5v).Bb
fixDown(1); T} `x-
} y@]_+2Vo
file://fixdown wWgWWXGT}
private void fixDown(int k) { 9K/HO!z
int j; m2-Sx
while ((j = k << 1) <= size) { =Xm@YVf&ZD
if (j < size %26amp;%26amp; queue[j] j++; (As#^q\>B
if (queue[k]>queue[j]) file://不用交换 O[# 27_dH
break; d[r#-h>dS
SortUtil.swap(queue,j,k); kTKq/G,Ft
k = j; 01[NX? qEa
} yh^!'!I6u[
} z+x\(/
private void fixUp(int k) { 2Fy>.*,?
while (k > 1) { Wi>!{.}%A
int j = k >> 1; M]<?k]_p
if (queue[j]>queue[k]) U2$d%8G
break; |\w=u6jX
SortUtil.swap(queue,j,k); ^*S ,xP
k = j; wU8Mt#D!
} QpZ:gM_
} >O1[:%Z1
^F>cp ,x
} z25lZI" X`
%?LOs H
} aGK?x1_
@*>@AFnf\Z
SortUtil： 4f@o mAM
^<;V]cY`
package org.rut.util.algorithm; ,_|]Ufr!a
hp8%.V$f
import org.rut.util.algorithm.support.BubbleSort; f6|KN+.
import org.rut.util.algorithm.support.HeapSort; Vw[6t>`
import org.rut.util.algorithm.support.ImprovedMergeSort; gHhh>FFAq
import org.rut.util.algorithm.support.ImprovedQuickSort; Tfh 2.
import org.rut.util.algorithm.support.InsertSort; FE" y\2}
import org.rut.util.algorithm.support.MergeSort; - *F(7$
import org.rut.util.algorithm.support.QuickSort; Kqun^"Df
import org.rut.util.algorithm.support.SelectionSort; R=.4
import org.rut.util.algorithm.support.ShellSort; S2n39 3
yPM3a7-Bm
/** ]FD'5p{
* @author treeroot "mX\&%i6\p
* @since 2006-2-2 ~SQ?BoCI[
* @version 1.0 N03G>fZ
*/ R,)}>X|<
public class SortUtil { Xm+8
public final static int INSERT = 1; 'iy*^A `Y
public final static int BUBBLE = 2; 0$_oT;{8
public final static int SELECTION = 3; YiYV>gaf"H
public final static int SHELL = 4; vK(i9>;7
public final static int QUICK = 5; lW<PoT
public final static int IMPROVED_QUICK = 6; |4 v0:ETb$
public final static int MERGE = 7; AGH|"EWG
public final static int IMPROVED_MERGE = 8; +$X#q8j06
public final static int HEAP = 9; A3vUPWdDk
1<+2kBuY
public static void sort(int[] data) { x2@U.r"zo
sort(data, IMPROVED_QUICK); 0_k'.5l%
} &GNxo$CG
private static String[] name={ v4?x.I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Jwj%_<
}; np%\&CVhN
aqYa{hXio
private static Sort[] impl=new Sort[]{ JBZUv
new InsertSort(), *J$=.fF1
new BubbleSort(), $=5=NuX
new SelectionSort(), BQBeo&n6
new ShellSort(), RE}?5XHb
new QuickSort(), : m)
new ImprovedQuickSort(), Ib|Rf;J~-
new MergeSort(), CL)lq)1(
new ImprovedMergeSort(), >:zK?(qu,N
new HeapSort() :}r.
}; uqM yoIc
x&^_c0fn
public static String toString(int algorithm){ tBNoI
return name[algorithm-1]; 2LNRtW*
} a,3j,(3
cHcmgW\4
public static void sort(int[] data, int algorithm) { T_X6Ulp
impl[algorithm-1].sort(data); 7Q7-vx
} e2z h&j
'D6T8B4
public static interface Sort { ]V-W~r=
public void sort(int[] data); ^F2b hXE
} 3k|oK'l
cUqke+!
public static void swap(int[] data, int i, int j) { :gerQz4R8
int temp = data; kxp);
data = data[j]; 0E?jW7yr
data[j] = temp; 0ge$ p,
} \=+b}mKV m
} )foq),2