[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; QO$18MBcc
} <@M5 C-hH
int i1=l; ^h_rE |c
int i2=mid+1; KYTXf+oh
for(int cur=l;cur<=r;cur++){ /[Nkk)8-
if(i1==mid+1) "I=Lbh-`
data[cur]=temp[i2++]; -d?<t}a
else if(i2>r) `&=%p|
data[cur]=temp[i1++]; D Z~036
else if(temp[i1] data[cur]=temp[i1++]; 9vi+[3s/=;
else _&HFKpHQ
data[cur]=temp[i2++]; vmgd
} s[4qC
} F4=X(P_6
Ne9VRM P
} c*owP
g#P]72TQ
改进后的归并排序: ."Pn[$'.
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package org.rut.util.algorithm.support; -wUT@a
<YCjo[(~
import org.rut.util.algorithm.SortUtil; *=md!^x`
xz`0V}dPl
/** ~p+ `pwjY1
* @author treeroot ~&,S xQT
* @since 2006-2-2 oJVdFE
* @version 1.0 s|WcJV
*/ "wVisL2+.
public class ImprovedMergeSort implements SortUtil.Sort { >]B_+r0m^
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private static final int THRESHOLD = 10; VVF9X(^rQ
#x;d+Q@
/* jz3f{~
* (non-Javadoc) 2n"-~'3\
* XcbEh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nt tu)wr
*/ #-L<
public void sort(int[] data) { UN<$F yb
int[] temp=new int[data.length]; p*jH5h cy
mergeSort(data,temp,0,data.length-1); {#=o4~u%;H
} ,A#gF_8
]'<}kJtN.
private void mergeSort(int[] data, int[] temp, int l, int r) { CT\rx>[J.6
int i, j, k; =g%<xCp
int mid = (l + r) / 2; x[&)\[t
if (l == r) \"I418T K
return; 1Uah IePf
if ((mid - l) >= THRESHOLD) K6F05h 5S
mergeSort(data, temp, l, mid); D3tcwjXoW_
else nBd(pOe
insertSort(data, l, mid - l + 1); B<|Vm.D
if ((r - mid) > THRESHOLD) ZP:+'\&J
mergeSort(data, temp, mid + 1, r); X~*/~f
else >N0L
insertSort(data, mid + 1, r - mid); ?>R(;B|ER
fDXTedrG/
for (i = l; i <= mid; i++) { 1vh[sKv9%
temp = data; "-HWw?rx/
} jlyuu
for (j = 1; j <= r - mid; j++) { u3cl7~- yW
temp[r - j + 1] = data[j + mid]; uowdzJ7
} x=W5e ^0?
int a = temp[l]; 1Si$Q
int b = temp[r]; ;+3@S`2r
for (i = l, j = r, k = l; k <= r; k++) { /*6[Itm_h
if (a < b) { L8pKVr
data[k] = temp[i++]; ASSe;+yp
a = temp; X=jD^"-
} else { ;wHyX)&X$
data[k] = temp[j--]; ey:%Zy [~
b = temp[j]; ##" Hui
} h5n@SE>G
} 8NWuhRRrw
} .8|"@
qP9`p4c8i
/** b$/7rVH!
* @param data y?iW^>|?L=
* @param l !@h)3f]`1G
* @param i q:wz!~(>
*/ (AG((eV
private void insertSort(int[] data, int start, int len) { &jrc]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7a4Z~r27/
} 8qUNh#
} D4{<~/oBv
} LmKY$~5P
} 2H1?f|0>
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堆排序： a 4?c~bs
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package org.rut.util.algorithm.support; ;6=*E'
|/u,6`
import org.rut.util.algorithm.SortUtil; 5^{2g^jH6
Sq`Zuu9t
/** .;dI&0Z
* @author treeroot /i"1e:cK
* @since 2006-2-2 1_mqPMm
* @version 1.0 8%Ak
*/ )'/xNR
public class HeapSort implements SortUtil.Sort{ (Kw%fJT
{P==6/<2o
/* (non-Javadoc) 2\"T&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =Nz;R2{@
*/ S:cd'68D
public void sort(int[] data) { V|2[>\Cv
MaxHeap h=new MaxHeap(); (ul_bA+
h.init(data); 0<Rq
for(int i=0;i h.remove(); #,SPV&
System.arraycopy(h.queue,1,data,0,data.length); ka$la;e3
} 1/=6s5vS}
Bl+PJ 0
private static class MaxHeap{ @f#6Nu
k4JTc2b
void init(int[] data){ ^HWa owy=
this.queue=new int[data.length+1]; .p78 \T
for(int i=0;i queue[++size]=data; Hr(%y&0
fixUp(size); Dyj>dh-
} +@+*sVb
} );xTl6Y9
AZ. j>+0xx
private int size=0; F{eI[A
VP }To
private int[] queue; A ?[Wfq|
MwD8a<2Dg
public int get() { LKM;T-
return queue[1]; K*tomy
} xE6hE'rh.O
p%+'iDb
public void remove() { T?*f}J
SortUtil.swap(queue,1,size--); 5~RR _G
fixDown(1); gAK"ShOhG=
} fjqd16{Q
file://fixdown O]?PC^GGY
private void fixDown(int k) { XrGP]k6.^
int j; 2zkOs:
while ((j = k << 1) <= size) { \| 'Yuh
if (j < size %26amp;%26amp; queue[j] j++; D0X!j,Kc
if (queue[k]>queue[j]) file://不用交换 cJ'OqV F
break; )D7/[zb^
SortUtil.swap(queue,j,k); @lCyH(c%
k = j; %vRCs]
} 9bUFxSH
} +6(\7?
private void fixUp(int k) { 4mm>6w8NT
while (k > 1) { ufocj1IU
int j = k >> 1; 4V'HPD>=V
if (queue[j]>queue[k]) be HEAQ
break; Z)<lPg!YAR
SortUtil.swap(queue,j,k); &[5pR60
k = j; O&@CT])8
} ,3Aiz|v-
} scy_
CWSc#E
} UYhxgPGsj
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} -7VQ{nC
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SortUtil： ^MvBW6#1
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package org.rut.util.algorithm; ZQ_AqzT3D
mpd?F'V
import org.rut.util.algorithm.support.BubbleSort; /1b7f'
import org.rut.util.algorithm.support.HeapSort; 2u(G:cR
import org.rut.util.algorithm.support.ImprovedMergeSort; gvFCsVv<{
import org.rut.util.algorithm.support.ImprovedQuickSort; 7Q?^wx
import org.rut.util.algorithm.support.InsertSort; Yb%#\.M/y
import org.rut.util.algorithm.support.MergeSort; vU9:`@beu
import org.rut.util.algorithm.support.QuickSort; L fZF
import org.rut.util.algorithm.support.SelectionSort; ;]W@W1)$
import org.rut.util.algorithm.support.ShellSort; /])P{"v$^
]&X}C{v)G
/** mTLJajE/
* @author treeroot ]$I}r= Em
* @since 2006-2-2 ur[^/lxx0
* @version 1.0 kG`&Z9P
*/ L.:8qY
public class SortUtil { ipS:)4QFxJ
public final static int INSERT = 1; -[[(Zx
public final static int BUBBLE = 2; zxeT{AFPr?
public final static int SELECTION = 3; m"wP]OQH*+
public final static int SHELL = 4; ^p3W}D
public final static int QUICK = 5; ]#vi/6\J
public final static int IMPROVED_QUICK = 6; sEi9<$~R@0
public final static int MERGE = 7; b8glZb*$
public final static int IMPROVED_MERGE = 8; gKtgW&PYm
public final static int HEAP = 9; =X7_!vSv
$ByP 9=|
public static void sort(int[] data) { a`>H69(bU
sort(data, IMPROVED_QUICK); "6Z(0 iu:{
} I8uFMP
private static String[] name={ kq@~QI?9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /dHIm`. Z
}; } g%v<'K
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private static Sort[] impl=new Sort[]{ TQ=HFs ~
new InsertSort(), 0B: v0R
new BubbleSort(), KtHkLYOCG
new SelectionSort(), ]`M2Kwp
new ShellSort(), ygQe'S{!S\
new QuickSort(), ;RYIc0%
new ImprovedQuickSort(), DKF '*
new MergeSort(), 5<YL^m{/L
new ImprovedMergeSort(), tTWEhHQ`
new HeapSort() 'UM *7
}; "<LWz&e^^
Zpz3?VM(
public static String toString(int algorithm){ ilAhw4A
return name[algorithm-1]; d0;?GQYn:
} V)P8w#,
>T-4!ZvS\j
public static void sort(int[] data, int algorithm) { =nqHVRA
impl[algorithm-1].sort(data); uaZHM@D
} 5]n\E?V'L
[v`kqL~
public static interface Sort { :aH5=@[!y
public void sort(int[] data); ?$l|];m)-
} tHK>w%|\R
"F[7b!>R
public static void swap(int[] data, int i, int j) { _<=h#lH
int temp = data; lnRL^ }
data = data[j]; Sb(OG 6
data[j] = temp; h}kJ,n
} -gUp/#l1
} %Aqf=R_^