[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; \/,SH?>4x
} %%f=aPw
int i1=l; adxJA}K}
int i2=mid+1; bEy%S"\<
for(int cur=l;cur<=r;cur++){ <n#JOjHV
if(i1==mid+1) )wGC=,
data[cur]=temp[i2++]; q|j;dI&
else if(i2>r) @!F9}n AP
data[cur]=temp[i1++]; ;lK2]
else if(temp[i1] data[cur]=temp[i1++]; 2f-Z\3)9 J
else m t*v@'l.
data[cur]=temp[i2++]; @Xh4ZMyEx
} n =v %}@f2
} 8ZahpB
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} 5Ut0I]h|z
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改进后的归并排序: 'N}Wo}1r
5H',Bm4-
package org.rut.util.algorithm.support; }%:?s6Ler
vWgh?h/ot
import org.rut.util.algorithm.SortUtil; )ejvT-
Rc6Rk!^
/** 7'<4'BGzl]
* @author treeroot [s2%t"H-y
* @since 2006-2-2 QzS{2Y[OQ
* @version 1.0 co*5NM^
*/ V*/))n?
public class ImprovedMergeSort implements SortUtil.Sort { k%LE"Q
:b ;5O3:B
private static final int THRESHOLD = 10; %k2zsM
CBvBBt*
/* LyQO_mT2
* (non-Javadoc) 'DIE#l`
* 85X^T]zo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5 )C~L]
*/ PzF)Vg
public void sort(int[] data) { [Z[)hUXE?
int[] temp=new int[data.length]; nU`;MW/^w
mergeSort(data,temp,0,data.length-1); >U}~Hv]
} w68qyG|wM
m+!%+S1
private void mergeSort(int[] data, int[] temp, int l, int r) { J^?O]|
int i, j, k; >:K3y$]_
int mid = (l + r) / 2; BpKP]V
if (l == r) 7>4t{aRf_8
return; ](W#Tj5-
if ((mid - l) >= THRESHOLD) Xau.4&\d
mergeSort(data, temp, l, mid); ;3-ssF}k*
else TLkkB09fvk
insertSort(data, l, mid - l + 1); f8n'9HOw>
if ((r - mid) > THRESHOLD) }^iE|YKz
mergeSort(data, temp, mid + 1, r); B 51LZP
else &v`kyc
insertSort(data, mid + 1, r - mid); v(0vP}[Q7E
pLIBNo?
for (i = l; i <= mid; i++) { eygyVhJ
temp = data; ES+&e/G"ds
} >0m-S :lk
for (j = 1; j <= r - mid; j++) { .)o5o7H
temp[r - j + 1] = data[j + mid]; 'IgtBd|K>
} .p5*&i7
int a = temp[l]; LRmO6>y
int b = temp[r]; |n~v_V2.0
for (i = l, j = r, k = l; k <= r; k++) { TX 87\W.
if (a < b) { @<AIPla
data[k] = temp[i++]; '|+_~ZO*d
a = temp; =GpLlJ`-
} else { PK~okz4b
data[k] = temp[j--]; ]A\n>Z!;
b = temp[j]; K;Xn!:) V:
} %?g]{
} {7;TQ?/
} :DZiDJ@
6?Wsg`9
/** 68d@By
* @param data kj[[78
* @param l U]P;X~$!
* @param i vD*KJ3(c
*/ [;b9'7j'
private void insertSort(int[] data, int start, int len) { H4pjtVBr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9#agI|d~
} Hnaq+ _]
} 1|%$ie
} 7,jqA"9
} 7Jqp2\
$~j]/U
堆排序： MRa>@Jn??A
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package org.rut.util.algorithm.support; 1n,JynJ
6-^+btl)#
import org.rut.util.algorithm.SortUtil; "3v%|
d,>l;l
/** /q^( uWu
* @author treeroot E6US
* @since 2006-2-2 wg[*]_,a
* @version 1.0 d EXw=u
*/ zL{KK9Or
public class HeapSort implements SortUtil.Sort{ kn<[v;+
~jPe9
/* (non-Javadoc) =*'`\}];"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M\GS&K$lq
*/ $pD^O!I)?
public void sort(int[] data) { FYi<+]HZ
MaxHeap h=new MaxHeap(); q80?C.,`
h.init(data); ;CC[>
for(int i=0;i h.remove(); 8?(4E 'vf
System.arraycopy(h.queue,1,data,0,data.length); }{ P}P}
} =l\D7s
+uH1rF_&@
private static class MaxHeap{ H<>x_}&
ZE1#{u~[y
void init(int[] data){ Gh< r_O~L3
this.queue=new int[data.length+1]; W[vak F
for(int i=0;i queue[++size]=data; ~vt8|OOo0
fixUp(size); h?SUDk:2^
} ':fVb3A[*d
} QTDI^ZeuF
@Wv*`
private int size=0; 'E@D
+Gjy%JFp
private int[] queue; eC3ZK"oJ
}b{N[
public int get() { 1\3n
return queue[1]; 1,/oS&?E
} )i?wBxq'MA
TcqqAc
public void remove() { ?iq:Gf
SortUtil.swap(queue,1,size--); %@IR7v~
fixDown(1); ZA# jw 8F
} 4[(P>`Unx
file://fixdown Vw,dHIe(3
private void fixDown(int k) { cL}g7D
int j; {:"bX~<^
while ((j = k << 1) <= size) { d) > if<o
if (j < size %26amp;%26amp; queue[j] j++; tV T(!&(
if (queue[k]>queue[j]) file://不用交换 _ '}UNIL
break; phNv^R+
SortUtil.swap(queue,j,k); VMNihx0FJ
k = j; Y`_6Ny="
} p3-sEIw}Ru
} EBn7waBS
private void fixUp(int k) { -yC},tK
while (k > 1) { _qGkTiP
int j = k >> 1; .|rpj&>g
if (queue[j]>queue[k]) d6Z;\f7[
break; ;Z8K3p
SortUtil.swap(queue,j,k); o|UZdGu
k = j; Bkcs4 x
} -dza_{&+iZ
} | 0&~fY
Xl}>mbB
} rSa3u*xB
\ET7
} OW6i2>Or
bclA+!1
SortUtil： $V@IRBm
DQE.;0ld
package org.rut.util.algorithm; -m-~
{5RM)J1
import org.rut.util.algorithm.support.BubbleSort; -f'z_&KI
import org.rut.util.algorithm.support.HeapSort; H_jMl$f)j
import org.rut.util.algorithm.support.ImprovedMergeSort; (llg!1
import org.rut.util.algorithm.support.ImprovedQuickSort; H*!E*_
import org.rut.util.algorithm.support.InsertSort; 3vMfms
import org.rut.util.algorithm.support.MergeSort; `?La
import org.rut.util.algorithm.support.QuickSort; pV1~REk$&
import org.rut.util.algorithm.support.SelectionSort; 9_&.G4%V
import org.rut.util.algorithm.support.ShellSort; QYg2'`(
x=9drKIw>
/** B>JRta;hj
* @author treeroot f>Ij:b`Z2
* @since 2006-2-2 X)'uTf0
* @version 1.0 C7nLa@
*/ i5rAb<q`
public class SortUtil { []'BrG)!
public final static int INSERT = 1; JH2d+8O:qK
public final static int BUBBLE = 2; _TkiI.'
public final static int SELECTION = 3; oo<,hOv
public final static int SHELL = 4; Bl(we/r
public final static int QUICK = 5; w%`7,du|
public final static int IMPROVED_QUICK = 6; ?a(ApD\
public final static int MERGE = 7; `Up3p24
public final static int IMPROVED_MERGE = 8; $_NVy>\&
public final static int HEAP = 9; Z~v.!j0
pWeKN`
public static void sort(int[] data) { l].dOso$`
sort(data, IMPROVED_QUICK); O,hT< s "
} VBy=X\w]
private static String[] name={ V:yia^1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \]GBd~i<
}; j]YS(Y@AY
C?X^h{Tp
private static Sort[] impl=new Sort[]{ lNqYpyvy*
new InsertSort(), xMU4Av[{
new BubbleSort(), =r#of|`Q
new SelectionSort(), pYH#Vh
new ShellSort(), s_u@8e 6_
new QuickSort(), va| 1N/&
new ImprovedQuickSort(), LG@5Z-
new MergeSort(), L%Me wU0TZ
new ImprovedMergeSort(), /wKL"M-%
new HeapSort() lorjMS
}; >DPC}@Wl
{}~7Gi!
public static String toString(int algorithm){ L`tr7EEr
return name[algorithm-1]; [>v.#:YM^
} +Y6=;*j$
E]i3E[T
public static void sort(int[] data, int algorithm) { `!
impl[algorithm-1].sort(data); [Jwo,?w
} '4ftclzL
j$,:cN
public static interface Sort { Qv|A^%Ub!
public void sort(int[] data); 7$Jb"s
} R8sj>.I9j
0M>+.}e+
public static void swap(int[] data, int i, int j) { Ic P]EgB
int temp = data; DFcgUEq
data = data[j]; EH=[!iW;
data[j] = temp; X6kCYTJYF
} 4Un(}P'
} S&q@M