[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; F9las#\J
} s?9Y3]&+&M
int i1=l; ~5Mj:{B
int i2=mid+1; N.nGez
for(int cur=l;cur<=r;cur++){ ZpBP#Y*
if(i1==mid+1) NN+;I^NqW&
data[cur]=temp[i2++]; xA2I+r*o
else if(i2>r) Q]K$yo
data[cur]=temp[i1++]; "8U=0a
else if(temp[i1] data[cur]=temp[i1++]; BKE?o^03
else c(5XT[Tw
data[cur]=temp[i2++]; ~h=iZ/g_^_
} kj4=Q\Rfm
} 5X5UUdTM
@;hdZLG]`&
} `*kl>}$
H=Cj/jE
改进后的归并排序: !SnLvW89Z
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package org.rut.util.algorithm.support; /e|qyWs
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import org.rut.util.algorithm.SortUtil; {5%d#|?
=_@) KWeX$
/** ug;\`.nT^
* @author treeroot ;9ChBA
* @since 2006-2-2 -^7 $HD
* @version 1.0 Tj<B;f!u
*/ W*(- *\1[
public class ImprovedMergeSort implements SortUtil.Sort { 9OY ao
SwO$UqYU=
private static final int THRESHOLD = 10; 61gyx6v
DYgB_Iak
/* K@Q%NK,
* (non-Javadoc) iG~&uEAJ
* @8A[HP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }'>mT,ytgk
*/ ouFKqRs;
public void sort(int[] data) { JxLfDr,dy
int[] temp=new int[data.length]; R4k+.hR
mergeSort(data,temp,0,data.length-1); [)0^*A2
} 2@ZRz%(Oa&
OpIeo+^X*
private void mergeSort(int[] data, int[] temp, int l, int r) { /P]N40_@
int i, j, k; CM[83>
int mid = (l + r) / 2; O2 + K
if (l == r) vfmY>nr
return; !V/7q'&t=
if ((mid - l) >= THRESHOLD) 2:nI4S
mergeSort(data, temp, l, mid); "f~OC<GdYs
else s6_i>
insertSort(data, l, mid - l + 1); b9-3
if ((r - mid) > THRESHOLD) Y}Y~?kE>M|
mergeSort(data, temp, mid + 1, r); lHTr7uF(
else zh\"sxL
insertSort(data, mid + 1, r - mid); 9v3n4=gc
t6\--lk_
for (i = l; i <= mid; i++) { tuuwoiQ*`
temp = data; Gui[/iY,F
} uf (_<~
for (j = 1; j <= r - mid; j++) { hJk:&!M=T
temp[r - j + 1] = data[j + mid]; q0vZR"y
} X*5N&AJ
int a = temp[l]; Pv\8 \,B9
int b = temp[r]; \l 8_aj
for (i = l, j = r, k = l; k <= r; k++) { `Gl[e4U
if (a < b) { ?gvu E1
data[k] = temp[i++]; E_Y!in 70
a = temp; eU e, P
} else { y>gw@+
data[k] = temp[j--]; ~kDJ-V
b = temp[j]; + DE/DR:
} 8xhx*A
} A2A_F|f
} v.u 5%
e+VE FWz
/** h9iQn<lp4.
* @param data 5tZ0zr
* @param l R?- zJ ;
* @param i qcQq.cS_'N
*/ U^U hZ!
private void insertSort(int[] data, int start, int len) { -:J<JX)o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 72*j6#zS
} KMQPA>w#
} T,vh=UF%]
} Q|S>C%4?
} BS?$eai@:9
bz~aj}"`
堆排序： [cl+AV "
2cRru]VZ5
package org.rut.util.algorithm.support; IXm[c@5l
$% gz,{
import org.rut.util.algorithm.SortUtil; Sl<1Rme=w
AP1ZIc6
/** Z'}%Mkm`i}
* @author treeroot ozl!vf# kv
* @since 2006-2-2 ;vX1U8
* @version 1.0 R(cg`8
*/ .c__T{<)[
public class HeapSort implements SortUtil.Sort{ d\JBjT1g
S'NLj(
/* (non-Javadoc) ]IeLKcn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gMkSl8[
*/ UK*v\TMv
public void sort(int[] data) { 4*5e0:O
MaxHeap h=new MaxHeap(); M_2>b:#A*
h.init(data); "Ehh9 m1&
for(int i=0;i h.remove(); KtH^k&z.f
System.arraycopy(h.queue,1,data,0,data.length); qK9A /Mc
} d~h;|Bl[
pLV %g#h
private static class MaxHeap{ |3Oyg?2
t imY0fx#
void init(int[] data){ a)Pr&9I
this.queue=new int[data.length+1]; ;Bzx}7A
for(int i=0;i queue[++size]=data; 7n+,!oJ
fixUp(size); oayu*a.
} C8|#
} :eJJL,v
[/VpvQ'
private int size=0; X-,oL.:c
@7.7+blS"H
private int[] queue; !y'>sAf
Ht\2 IP
public int get() { "Jg.)1Jw
return queue[1]; H270)Cwn+
} k_zn>aR$F
4gNN "
public void remove() { J]{<Z?%
SortUtil.swap(queue,1,size--); z,2*3Be6V
fixDown(1); $ Y^0l
} ) jvI Nb
file://fixdown re}PpXRC
private void fixDown(int k) { r)K5<[\r
int j; [?O4l`
while ((j = k << 1) <= size) { 1sonDBd0@;
if (j < size %26amp;%26amp; queue[j] j++; n00J21
if (queue[k]>queue[j]) file://不用交换 u U>L (
break; p|mFF0SL
SortUtil.swap(queue,j,k); (c^ {T)
k = j; ;BT7pyu%[
} k.o8!aCm
} dC-~=}HR^
private void fixUp(int k) { KRcB_(
while (k > 1) { sK&kp=zu
int j = k >> 1; ZZTf/s*
if (queue[j]>queue[k]) ]FIIs58IM
break; ~K<h~TNP
SortUtil.swap(queue,j,k); 3;> z %{
k = j; ]j6K3
} )cZHBG.0H
} .>.GQUr
'`2MxRP
} xa<KF
O"\_%=X9
} Gau@RX:O
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SortUtil： |O oczYf
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package org.rut.util.algorithm; F'|e:h
_od /)#
import org.rut.util.algorithm.support.BubbleSort; )z18:C3
import org.rut.util.algorithm.support.HeapSort; @U1|?~M%s
import org.rut.util.algorithm.support.ImprovedMergeSort; gW--[
import org.rut.util.algorithm.support.ImprovedQuickSort; >wt.)c?5
import org.rut.util.algorithm.support.InsertSort; kD%MFT4
import org.rut.util.algorithm.support.MergeSort; y%61xA`#
import org.rut.util.algorithm.support.QuickSort; bu_@A^ys
import org.rut.util.algorithm.support.SelectionSort; ^"54Q^SH
import org.rut.util.algorithm.support.ShellSort; |uw48*t
Fw{@RQf8
/** .35~+aqC
* @author treeroot V\{@c%xW
* @since 2006-2-2 M<*Tp^Y'
* @version 1.0 ~OPBZ#
*/ |)Dm.)/0)
public class SortUtil { !t"/w6X1I
public final static int INSERT = 1; {#,5C H')
public final static int BUBBLE = 2; t&=bW<6
public final static int SELECTION = 3; <#nU 06 fN
public final static int SHELL = 4; b$fmU"%&|
public final static int QUICK = 5; O2pE"8=4Q
public final static int IMPROVED_QUICK = 6; +_cigxpTc
public final static int MERGE = 7; &|ne!wu
public final static int IMPROVED_MERGE = 8; V:J|shRo
public final static int HEAP = 9; L[Z^4l_!
Us'JMZ~
public static void sort(int[] data) { z~3ubta8(@
sort(data, IMPROVED_QUICK); Ax;?~v4Z
} ]w _&%mB
private static String[] name={ I]+ zG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .FgeAxflP
}; vN],9q
f'(F'TE
private static Sort[] impl=new Sort[]{ 3'`&D/n
new InsertSort(), "#7Q}d!x
new BubbleSort(), f77W{T4
new SelectionSort(), !-470J
new ShellSort(), F1-"yX1B
new QuickSort(), 7z1@XO<D
new ImprovedQuickSort(), LmqSxHs0Q
new MergeSort(), 'h'pM#D
new ImprovedMergeSort(), hp(MKfhH
new HeapSort() DzE^FY
}; Y<VX.S2kf
eaDZ^Z Er
public static String toString(int algorithm){ D})/2O p
return name[algorithm-1]; #-G@p
} Ot`%5<E^
fx(8 o+
public static void sort(int[] data, int algorithm) { #<9'{i3
impl[algorithm-1].sort(data); uj.$GAtO)
} $p0D9mF
r/a@ x9
public static interface Sort { gL&w:_
public void sort(int[] data); Tc||96%2^
} vnQFq
.[]S!@+%
public static void swap(int[] data, int i, int j) { P[q>;Fx*
int temp = data; %#v$d
data = data[j]; 6wwbH}*=?
data[j] = temp; ~(XaXu
} \EoE/2"<
} BF gxa#De