[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; CAlCDfKW}
} <$YlH@;)`a
int i1=l; 5^cCY'I
int i2=mid+1; K@2),(z
for(int cur=l;cur<=r;cur++){ H+#FSdy#
if(i1==mid+1) {_}I!`opr$
data[cur]=temp[i2++]; #G3<7PK
else if(i2>r) IgzQr>
data[cur]=temp[i1++]; Smh,zCc>s
else if(temp[i1] data[cur]=temp[i1++]; [;N'=]`
else y} '@R$
data[cur]=temp[i2++]; 3%6?g*
} cl1T8vFM
} =D(j)<9$A
AX INThJ
} 6Zo}(^Ovz
+_!QSU,@
改进后的归并排序: W)/#0*7
=wJX0A|
package org.rut.util.algorithm.support; ;a/E42eN;
B?QIN]
import org.rut.util.algorithm.SortUtil; Sdo-nt
-LSWmrj
/** s~>}a
* @author treeroot cL]1f
* @since 2006-2-2 aXVFc5C\
* @version 1.0 do_[&
*/ kstIgcI
public class ImprovedMergeSort implements SortUtil.Sort { GyIV Hby
l} /F*
private static final int THRESHOLD = 10; #E?4E1bnB
I]575\bA
/* M:8R-c#![
* (non-Javadoc) ?[AD=rUC
* /z!%d%"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]]mJ']l
*/ w xH7?tsf
public void sort(int[] data) { Q8NX)R
int[] temp=new int[data.length]; s%S
mergeSort(data,temp,0,data.length-1); _#niyW+?~
} oRFq@g
)4OxY[2J
private void mergeSort(int[] data, int[] temp, int l, int r) { j.Hf/vi`z
int i, j, k; "g|#B4'e
int mid = (l + r) / 2; ]lbuy7xj63
if (l == r) 2iOV/=+
return; -~0^P,yQ
if ((mid - l) >= THRESHOLD) =&]L00u.
mergeSort(data, temp, l, mid); &&+H+{_Q
else bsX[UF
insertSort(data, l, mid - l + 1); QY/w
if ((r - mid) > THRESHOLD) WY/}1X9.%
mergeSort(data, temp, mid + 1, r); L#J1b!D&<6
else +R&gqja
insertSort(data, mid + 1, r - mid); ;'|Ey
Wc#24:OKe3
for (i = l; i <= mid; i++) { $]d^-{|
temp = data; l-Z4Mq6*L
} =euni}7a
for (j = 1; j <= r - mid; j++) { N['.BN
temp[r - j + 1] = data[j + mid]; XwmL.Gg:]7
} siI;"?
int a = temp[l]; #a6iuO0I
int b = temp[r]; J zl6eo[;
for (i = l, j = r, k = l; k <= r; k++) { CrLrw T
if (a < b) { X8|,
data[k] = temp[i++]; zfU{Kd
a = temp; ;TYBx24vD'
} else { O-^Ma-}
data[k] = temp[j--]; 6Oq7#3]
b = temp[j]; Vksuu@cch
} XSRsGTCC=
} }7Uoh(d
} g#bRT*,L
V`- 9m$
/** )GpK@R]{
* @param data eFgA 8kY)
* @param l jp,4h4C^)
* @param i R_C)
*/ &yg|t5o
private void insertSort(int[] data, int start, int len) { dN q$}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F8=+j_UGI
} gdc<ZYcM
} ?< +WG/(d
} /: "1Z]@
} 7.Op<
\e*]Ls#jS
堆排序： .*oU]N%K=
W\3X=@|u)
package org.rut.util.algorithm.support; vsPu*[%
~ljXzD93Z
import org.rut.util.algorithm.SortUtil; 3fj4%P"
?,mmYW6TjB
/** XS#Qu=,-
* @author treeroot uRvP hkqm
* @since 2006-2-2 o!Zb0/AP)
* @version 1.0 Ud?Q%)X
*/ %b$>qW\*&
public class HeapSort implements SortUtil.Sort{ D*jM1w_`
vh^VxS
/* (non-Javadoc) K;?+8(H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /^ts9:
*/ c 9Mz]1@f
public void sort(int[] data) { ?uu*L6
MaxHeap h=new MaxHeap(); oH@78D0A
h.init(data); Q &8-\
for(int i=0;i h.remove(); HMXE$d=[
System.arraycopy(h.queue,1,data,0,data.length); *dQSw)R
} G|Ti4_w
/~1+i'7V.,
private static class MaxHeap{ sHj/;
dtDFoETz
void init(int[] data){ _a, s )
this.queue=new int[data.length+1]; .-zom~N-?
for(int i=0;i queue[++size]=data; 4W75T2q#
fixUp(size); ]Wup/o
} 6tZI["\
} KNl$3nX
NEs:},)o
private int size=0; g)-te+?6
>P(.:_^p
private int[] queue; K/$KI7P
'/p4O2b,
public int get() { " bG2:
return queue[1]; !WlH'y-I
} lE;!TQj:X
(FV >m
public void remove() { \U0Q<ot/7
SortUtil.swap(queue,1,size--); P?<y%c<
fixDown(1); SbZ6t$"
} f);FoVa6
file://fixdown z:O8Ls^\T
private void fixDown(int k) { @EAbF>>
int j; "@kaHIf[
while ((j = k << 1) <= size) { %<5'=t'|-U
if (j < size %26amp;%26amp; queue[j] j++; jPeYmv]
if (queue[k]>queue[j]) file://不用交换 b>k y
break; -j(6;9"7]|
SortUtil.swap(queue,j,k); nN;u,}e
k = j; pAEx#ck
} I fir ,8
} iso4]>LF
private void fixUp(int k) { Ac6=(B
while (k > 1) { 5;?yCWc
int j = k >> 1; H]s.=.Ki
if (queue[j]>queue[k]) llDJ@
break; GILfbNcd
SortUtil.swap(queue,j,k); 3T 9j@N77
k = j; !k%#R4*>
} [lAp62i5
} K,]=6Rj
$( )>g>%
} Bx!-"e
-di o5a
} ;jPXs
-M2yw
SortUtil： Q\)F;:|
2:R+tn(F
package org.rut.util.algorithm; OSJ$d
\jA~9
import org.rut.util.algorithm.support.BubbleSort; M2|is ~
import org.rut.util.algorithm.support.HeapSort; tgaO!{9I?
import org.rut.util.algorithm.support.ImprovedMergeSort; Qd6FH2Pl
import org.rut.util.algorithm.support.ImprovedQuickSort; +V+a4lU14
import org.rut.util.algorithm.support.InsertSort; f)!Z~t &
import org.rut.util.algorithm.support.MergeSort; AS,%RN^.
import org.rut.util.algorithm.support.QuickSort; F?cK-.
import org.rut.util.algorithm.support.SelectionSort; BHw, 4#F1;
import org.rut.util.algorithm.support.ShellSort; OZT.=^:A
t Pf40`@
/** jal-9NV)!
* @author treeroot :LTN!jj
* @since 2006-2-2 YP9^Bp{0
* @version 1.0 kLY^!
*/ {[(h[MW#
public class SortUtil { xpI wrJO
public final static int INSERT = 1; b\ PgVBf9
public final static int BUBBLE = 2; q =Il|Nb>
public final static int SELECTION = 3; 4=.so~9odX
public final static int SHELL = 4; $|@ r!/W
public final static int QUICK = 5; OH"XrCX7n
public final static int IMPROVED_QUICK = 6; h$=2p5'-
public final static int MERGE = 7; P_dJZ((X
public final static int IMPROVED_MERGE = 8; CJ%I51F`X
public final static int HEAP = 9; qVPeB,kIz
4sM.C9W
public static void sort(int[] data) { J=L5=G7(
sort(data, IMPROVED_QUICK); +O5hH8<&b
} _FEFx
private static String[] name={ Z= !*e~j@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zT[!o j7
}; p8Q1-T3v
f-2c0Bi
private static Sort[] impl=new Sort[]{ 'n|5ZhXPB
new InsertSort(), s<Fl p
new BubbleSort(), T>GM%^h,7-
new SelectionSort(), KYP!Rs/j.
new ShellSort(), d %#b:(,
new QuickSort(), >3_Gw4S*H
new ImprovedQuickSort(), BZxvJQ
new MergeSort(), fT{Yg /j
new ImprovedMergeSort(), m4g$N)
new HeapSort() L-\GHu~)
}; go"Hf_
2"5v[,$1H
public static String toString(int algorithm){ :Yks|VJ1
return name[algorithm-1]; -^57oU
} qw8Rlws%
n(|^SH4$b
public static void sort(int[] data, int algorithm) { %IRi1EmN8
impl[algorithm-1].sort(data); o]:9')5^
} 4&f3%eTi
Rh |nP&6
public static interface Sort { Z<phcqEi8
public void sort(int[] data); bTu9;(
} C $JmzrE
)ANmIwmC#
public static void swap(int[] data, int i, int j) { [9 RR8
int temp = data; EZj9wd"u
data = data[j]; 3Y~>qGQwh
data[j] = temp; 9K&:V(gmw
} Faf&U%]*`
} ~nPtlrQa#*