[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; xaGVu0q
} T^/Gj|N*
int i1=l; ^m6k@VM
int i2=mid+1; Gl?P.BCW.&
for(int cur=l;cur<=r;cur++){ !Z#_X@NFc
if(i1==mid+1) D__lqboz
data[cur]=temp[i2++]; anHBySI3
else if(i2>r) el <<D
data[cur]=temp[i1++]; *23m-
else if(temp[i1] data[cur]=temp[i1++]; L LYHr
else Ov$N"
data[cur]=temp[i2++]; B6tcKh9d,
} 1$='`@8I
} t 3(%UB
o~i]W.SI(
} 8gVxiFjo
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改进后的归并排序: #JJp:S~`
, aRJ!AZ
package org.rut.util.algorithm.support; 3e!3.$4M
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import org.rut.util.algorithm.SortUtil; 5]4<!m
s`8M%ZLu
/** 8w{#R{w
* @author treeroot xm%[}Dt]
* @since 2006-2-2 XBfiaj
* @version 1.0 ,W)IVc
*/ q|47;bK'
public class ImprovedMergeSort implements SortUtil.Sort { xG*lV|<7>
~pd1)
private static final int THRESHOLD = 10; E1Ru)k{B
xJ[k#?T'
/* s${T*)S@G
* (non-Javadoc) 0[Xt,~
* CX&yjT6`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w8m8r`h
*/ @e.OU(Bf
public void sort(int[] data) { jV,(P$ 5;
int[] temp=new int[data.length]; IyG= 7
mergeSort(data,temp,0,data.length-1); yNhscAMNn
} 2fj0 I
Vq\..!y
private void mergeSort(int[] data, int[] temp, int l, int r) { U}RS*7`
int i, j, k; VgFF+Eg
int mid = (l + r) / 2; Se^/VVm
if (l == r) GvZac
return; RvyBg:Aj5
if ((mid - l) >= THRESHOLD) y~]IVl"
mergeSort(data, temp, l, mid); C>w9 {h
else 4pfix1F g
insertSort(data, l, mid - l + 1); `mq4WXO\
if ((r - mid) > THRESHOLD) _e:5XQ
mergeSort(data, temp, mid + 1, r); 0p:ClM2O
else ;+r)j"W
insertSort(data, mid + 1, r - mid); bMqu5G_q
1^x2WlUm4
for (i = l; i <= mid; i++) { E&iWtwkz
temp = data; =M/UHOY
} .gM>FUH3L
for (j = 1; j <= r - mid; j++) { e_>rJWI}
temp[r - j + 1] = data[j + mid]; o-Q]Dk1W
} lJ2|jFY9
int a = temp[l]; xu%! b0
int b = temp[r]; [}9XHhY1O=
for (i = l, j = r, k = l; k <= r; k++) { +2;#9aa I
if (a < b) { fcE/
data[k] = temp[i++]; .UT,lqEkv
a = temp; {0A[v}X ~
} else { hVT=j ?~
data[k] = temp[j--]; #czyr@
b = temp[j]; -~<q,p"e
} 5,0wj0l
} E+^} B/"
} T}w*K[z $
AjL?Qh4
/** LRCS)UBY(.
* @param data zgq_0w~X
* @param l "x:)$@
* @param i o/x5
*/ wQdW lon
private void insertSort(int[] data, int start, int len) { !ulLGmUn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5|6z1{g8
} ."!8B9s
} VJ6>3
} 8H3!; ]
} Lilk8|?#W
282+1X
堆排序： +QXYU8bYZ
uwH)/BW)[
package org.rut.util.algorithm.support; EMW4<na[
9p[W :)P4d
import org.rut.util.algorithm.SortUtil; .kB3jfw0,
+9Hk+.
/** =|6^)lt$
* @author treeroot Z+``/Q]>+
* @since 2006-2-2 FQ9csUjpB
* @version 1.0 U7*VIRibv+
*/ 3h D2C'KD
public class HeapSort implements SortUtil.Sort{ &aevR^f+
1VjeP *
/* (non-Javadoc) qh)!|B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -9H!j4]T?
*/ DX%8.@
public void sort(int[] data) { S,`Sq8H
MaxHeap h=new MaxHeap(); O&?CoA?
h.init(data); \6`%NhkM_
for(int i=0;i h.remove(); ?2<6#>(7a
System.arraycopy(h.queue,1,data,0,data.length); Ltic_cjYd?
} $Va]vC8?
}lNufu
private static class MaxHeap{ Zm; +Ku>
ktw!T{
void init(int[] data){ tZNad
this.queue=new int[data.length+1]; Yyo9{4v+p{
for(int i=0;i queue[++size]=data; B yy-Cc
fixUp(size); o. V0iS]
} -EkDG]my
} u6qi
#H|j-RM2
private int size=0; M;p q2$
!(ux.T0
private int[] queue; .z-^Ga*
@rK>yPhf
public int get() { C>\!'^u1
return queue[1]; QnP?;
} 2p3u6\y
q| =q:4_L
public void remove() { |Z7bd^
SortUtil.swap(queue,1,size--); t~<-4N$(
fixDown(1); @'<j!CqQ o
} 1[gjb((
file://fixdown P{i8
private void fixDown(int k) { <k-@R!K~JC
int j; U70@}5!
while ((j = k << 1) <= size) { [q>i
if (j < size %26amp;%26amp; queue[j] j++; 2$i 0yPv
if (queue[k]>queue[j]) file://不用交换 l LD)i J1
break; ,Y\4xg*`
SortUtil.swap(queue,j,k); Zs$RKJ7
k = j; h$ETH1Ue
} Ay"2W%([`
} B> "r-O
private void fixUp(int k) { ,~N+?k_
while (k > 1) { #g`cih=QL
int j = k >> 1; kG;\i
if (queue[j]>queue[k]) G|G?h
break; v/TlXxfil
SortUtil.swap(queue,j,k); ik:)-GV;s
k = j; ux79"5qb
} L%s4snE
} D917[<$
pXT$Y8M
} 0[!gk]p
In9|n^=H@
} jVFRqT%
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SortUtil： iB`WXU
Ye=7Y57Nr
package org.rut.util.algorithm; hzPB~obC
jQ\ MB
import org.rut.util.algorithm.support.BubbleSort; /qhm9~4e3
import org.rut.util.algorithm.support.HeapSort; .Qi1I
import org.rut.util.algorithm.support.ImprovedMergeSort; zc,9Qfn
import org.rut.util.algorithm.support.ImprovedQuickSort; %qjyk=z+Z
import org.rut.util.algorithm.support.InsertSort; seV;f^-hR
import org.rut.util.algorithm.support.MergeSort; &CeF^
import org.rut.util.algorithm.support.QuickSort; ::72~'tw
import org.rut.util.algorithm.support.SelectionSort; 5wFS.!xD
import org.rut.util.algorithm.support.ShellSort; `E0.PV
AGJ=de.
/** 8.%a"sxr
* @author treeroot cA*X$j6
* @since 2006-2-2 HxqV[|}0u
* @version 1.0 7F9g:r/^
*/ ie)1h
public class SortUtil { i!}nGJGg
public final static int INSERT = 1; }Ka.bZS
public final static int BUBBLE = 2; ;!Z7-OZX
public final static int SELECTION = 3; o`1V
public final static int SHELL = 4; CT:eV7<>s
public final static int QUICK = 5; KjfKo;T
public final static int IMPROVED_QUICK = 6; H"RF[bX(
public final static int MERGE = 7; `:BQ&T%UQR
public final static int IMPROVED_MERGE = 8; L"du"-
public final static int HEAP = 9; ; 7v7V
,;e-37^0l
public static void sort(int[] data) { A&lgiR*ObT
sort(data, IMPROVED_QUICK); ,N|R/Vk$+E
} 9oxf)pjw
private static String[] name={ JHh9> .1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dj&m
}; >Hzb0N!VJ
f}ij=Y9
private static Sort[] impl=new Sort[]{ pB7Z;&9
new InsertSort(), 8YLZ)k'
new BubbleSort(), t5v)6|
new SelectionSort(), GH+FZ (F
new ShellSort(), *rFbehfH
new QuickSort(), )%@WoBRj
new ImprovedQuickSort(), A8Z?[,Mq!
new MergeSort(), *2C79hi1
new ImprovedMergeSort(), {f-/,g~
new HeapSort() ABe^]HlH
}; !2M[
K2o0L5Lke
public static String toString(int algorithm){ -[7,ph
return name[algorithm-1]; %TTL^@1!b
} bOIM0<(h
,Yprk%JT
public static void sort(int[] data, int algorithm) { Sq8Q*
impl[algorithm-1].sort(data); B';>Hk
} Q;,3W+(
j72]_G
public static interface Sort { U <$xp
public void sort(int[] data); nV xMo_
} ^8*SCM_A
s!fY^3
public static void swap(int[] data, int i, int j) { S9#N%{8P
int temp = data; w|FVqX
data = data[j]; QOy&!6
data[j] = temp; z.Kq}r^
} [T#a1!
} xI\s9_"Qy