[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; e{~s\G8g
} ZlHN-!OZp
int i1=l; =8?gx$r2
int i2=mid+1; FL+^r6DQ
for(int cur=l;cur<=r;cur++){ .FS`Fh;
if(i1==mid+1) vt3yCS
data[cur]=temp[i2++]; w6MEY"<L
else if(i2>r) G(-1"7
data[cur]=temp[i1++]; *5bKJgwJ
else if(temp[i1] data[cur]=temp[i1++]; &>I4-D[
else 777N0,o(
data[cur]=temp[i2++]; /XG4O
} iD)R*vnAi
} ^@'LF T)
e'I13)
} x(nWyVB
/h=:heS4$
改进后的归并排序: URq{#,~CT
HY.?? 5MH
package org.rut.util.algorithm.support; L=u>}?!,Fj
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import org.rut.util.algorithm.SortUtil; T&Y?IE}
3_JxpQg
/** E"e<9
* @author treeroot $=/.oh
* @since 2006-2-2 Hf ]aA_:
* @version 1.0 $0C1';=^}
*/ 8}FZ1h2 4
public class ImprovedMergeSort implements SortUtil.Sort { $okGqu8z.O
"=0#pH1o
private static final int THRESHOLD = 10; Y4Hi<JWo
8v7;{4^
/* _u$X.5Q;
* (non-Javadoc) io_4d2uBh
* _q >>]{5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /=9t$u|
*/ 8-Ik .,}
public void sort(int[] data) { je6H}eWTC6
int[] temp=new int[data.length]; Y]ML-smN
mergeSort(data,temp,0,data.length-1); .`z](s
} &[*F!=%8
\vVGfG?6
private void mergeSort(int[] data, int[] temp, int l, int r) { zK`z*\
int i, j, k; \K+LKa)
int mid = (l + r) / 2; }v[*V
if (l == r) z\Vu`Yz
return; ^zPa^lo-
if ((mid - l) >= THRESHOLD) 85U')LY
mergeSort(data, temp, l, mid); 9*gD;)!
else ^NB@wuf7
insertSort(data, l, mid - l + 1); c0v;r4Jo#j
if ((r - mid) > THRESHOLD) Jrp{e("9
mergeSort(data, temp, mid + 1, r); oR'8|~U@B
else 1s4+a^&
insertSort(data, mid + 1, r - mid); 6$TE-l
9H~3&-8&
for (i = l; i <= mid; i++) { LMchNTL
temp = data; ZzA4iT=KO
} [,s{/OM
for (j = 1; j <= r - mid; j++) { .80^c
temp[r - j + 1] = data[j + mid]; R8a4F^{*
} .!T]sX_P
int a = temp[l]; IP'gN-#i
int b = temp[r]; P!qU8AJkt
for (i = l, j = r, k = l; k <= r; k++) { DN)Ehd.
if (a < b) { SV;S`\i
data[k] = temp[i++]; f)x^s$H
a = temp; ;h>s=D,r
} else { \; Io
data[k] = temp[j--]; deR2l(0%yr
b = temp[j]; 7(<6+q2~
} -`FPR4;
} G<9UL*HU
} 8YJ8_$Z
qP<wf=wY
/** ~W'>L++
* @param data wehZ7eqm
* @param l "Gx(-NH+
* @param i 5#+G7 'k
*/ g6:S"Em
private void insertSort(int[] data, int start, int len) { G"3)\FEM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o*7`r~
} Zf~Em'g"3
} Gp.+&\vi
} ^sxcBG
} tZR%s
5/<?Y&x
堆排序： vzVXRX
zj.;O#hW
package org.rut.util.algorithm.support; !\.%^LK1
[!E pv<G
import org.rut.util.algorithm.SortUtil; k 9 Xi|Yj
ml$"C
/** mF\r]ovVm
* @author treeroot ]9]cef=h#
* @since 2006-2-2 eyK=F:GO
* @version 1.0 AL%H$I
*/ <`8l8cL
public class HeapSort implements SortUtil.Sort{ %;+Q0 e9
o@6:|X)7
/* (non-Javadoc) U5 ~L^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AW;"` ].
*/ }r:H7&|&
public void sort(int[] data) { EAYx+zI
MaxHeap h=new MaxHeap(); j#e^PK <
h.init(data); [UN`~
for(int i=0;i h.remove(); 1PLxc)LsG
System.arraycopy(h.queue,1,data,0,data.length); < &[=,R0 @
} FZTBvdUYp
*I7$\0Q
private static class MaxHeap{ dx{ZG'@aH
HY[eo/nM1d
void init(int[] data){ {U?UM
this.queue=new int[data.length+1]; 1DPgiIG~
for(int i=0;i queue[++size]=data; $y~!ePKh
fixUp(size); i,jPULzyjk
} B\BxF6 y
} 9l9h*Pgt
bd],fNgJ
private int size=0; dZ'hTzw~
_&s37A&\
private int[] queue; O4xV "\
3#7D g't
public int get() { w@U`@})r.
return queue[1]; ~D1.opj3
} A%S6&!I:(
5yO%|)
public void remove() { u`Kjs}F'
SortUtil.swap(queue,1,size--); _:|/4.]`_
fixDown(1); \Q[u?/TF
} nDLr17
file://fixdown "NqB_?DT
private void fixDown(int k) { |ho|Kl `=
int j; V<f76U)
while ((j = k << 1) <= size) { C]{:>= K
if (j < size %26amp;%26amp; queue[j] j++; r9@4-U7v&
if (queue[k]>queue[j]) file://不用交换 xB=~3
break; ~$7fU
SortUtil.swap(queue,j,k); ^3*k6h[(
k = j; ,1+AfI
} :Z0m "
} S`ms[^-q*
private void fixUp(int k) { Wx&gI4~
while (k > 1) { L$*sv.
int j = k >> 1; S0+nQM%
if (queue[j]>queue[k]) $7%e|0jC
break; }$-;P=k
SortUtil.swap(queue,j,k); }Xv2I$J
k = j; @?,iy?BSG
} `8$gaA*
} Z~O1$,Z
afEhC0j
} '{9nQDgT
1muB* O
} 9L+dN%C
z&!n'N<C
SortUtil： (9bFIvMc
!9+xKr99
package org.rut.util.algorithm; k!Y7Rc{"
D,Ft*(|T
import org.rut.util.algorithm.support.BubbleSort; 5x";}Vp>P
import org.rut.util.algorithm.support.HeapSort; ~5e)h_y
import org.rut.util.algorithm.support.ImprovedMergeSort; sYlA{Z"
import org.rut.util.algorithm.support.ImprovedQuickSort; AN;SRl
import org.rut.util.algorithm.support.InsertSort; ~Xa8\>
import org.rut.util.algorithm.support.MergeSort; \OMWE/qMy
import org.rut.util.algorithm.support.QuickSort; E;7vGGf]
import org.rut.util.algorithm.support.SelectionSort; ]mEY/)~7
import org.rut.util.algorithm.support.ShellSort; MpZ #
5v:c@n
/** l*;Isz:
* @author treeroot V@6,\1#`|
* @since 2006-2-2 :sD/IM",},
* @version 1.0 hiKgV|ZD
*/ A1`y_ Aj
public class SortUtil { =<nx[J
public final static int INSERT = 1; 7VWq8FH`
public final static int BUBBLE = 2; 5c*kgj:x
public final static int SELECTION = 3; |> mx*G
public final static int SHELL = 4; WVPnyVDc
public final static int QUICK = 5; XI+m
public final static int IMPROVED_QUICK = 6; WJ)( *1
public final static int MERGE = 7; E3X6-J|
public final static int IMPROVED_MERGE = 8; NbPv>/r
public final static int HEAP = 9; 34lt?6%j
|q&&"SpA
public static void sort(int[] data) { 1an?/j,
sort(data, IMPROVED_QUICK); !F3Y7R
} i@7b
private static String[] name={ ,1-n=eTQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EC*rd
}; 3R!?r^h
UOTM>d1P
private static Sort[] impl=new Sort[]{ d^5OB8t
new InsertSort(), kaBP&6|Z
new BubbleSort(), "o+E9'Dm
new SelectionSort(), I"/p^@IX
new ShellSort(), ROZOX$XM
new QuickSort(), t;ZA}>/
new ImprovedQuickSort(), %au2kG,
new MergeSort(), Uj5%06
new ImprovedMergeSort(), :{za[,
new HeapSort() N5$IVz}
}; p BU,"Yy&
|)4Fe/!cJ
public static String toString(int algorithm){ R2uekpP
return name[algorithm-1]; [~cb&6|M
} 3N8RZt1.b
UA@(D
public static void sort(int[] data, int algorithm) { 3<:(Eda}
impl[algorithm-1].sort(data); wvH=4TT=w"
} nt$VH
-[\+~aDH,
public static interface Sort { O5^!\j.WR
public void sort(int[] data); rkw^RW^
} [T8BQn!
[ 0?*J<d
public static void swap(int[] data, int i, int j) { <=m@Sg{o
int temp = data; ySyA!Z
data = data[j]; @=@7Uu-
data[j] = temp; a`]Dmw8@
} BEn,py7
} tqdw y.