[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; eQ/w Mr
} #9]2Uixq[
int i1=l; =&UE67eK,
int i2=mid+1; Evm3Sm!S
for(int cur=l;cur<=r;cur++){ TA*}p=?6?!
if(i1==mid+1) eu$VKLY*
data[cur]=temp[i2++]; {u1|`=;
else if(i2>r) mm:TR?^
data[cur]=temp[i1++]; }'x)e
else if(temp[i1] data[cur]=temp[i1++]; W1"NKg~4
else T=42]h
data[cur]=temp[i2++]; v0 :n:q
} MSM8wYcD
} }WC[<AqI
3R%JmLM+R9
} ` wEX;
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改进后的归并排序: \os"w "
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package org.rut.util.algorithm.support; w@,p`
#btf|\D
import org.rut.util.algorithm.SortUtil; v0)Y,hW
O8\f]!O(
/** gw,K*ph}q
* @author treeroot X+A@//,7
* @since 2006-2-2 Posz|u<x
* @version 1.0 Ss5@n
*/ 7SJ=2
public class ImprovedMergeSort implements SortUtil.Sort { 0g:q%P0
Het"x
private static final int THRESHOLD = 10; 8493Sw
m\jjj^f a
/* MhHh`WUGh
* (non-Javadoc) v^o`+~i
* Ar>JQ@0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s1cu5eCt
*/ 7M~/ q.
public void sort(int[] data) { Psx"[2iZm
int[] temp=new int[data.length]; u5ZyOZ;
mergeSort(data,temp,0,data.length-1); LBD],Ba!
} Iv
3^ UoK
private void mergeSort(int[] data, int[] temp, int l, int r) { \f4rA?+f
int i, j, k; {u y^Bui}
int mid = (l + r) / 2; T$u'+* Xx
if (l == r) 1gBLJ0q
return; kI(3Pf].
if ((mid - l) >= THRESHOLD) 80Hi v
mergeSort(data, temp, l, mid); iQ Xlz]'
else VV1sadS:S`
insertSort(data, l, mid - l + 1); }Em{?Hqy
if ((r - mid) > THRESHOLD) Hm'fK$y(
mergeSort(data, temp, mid + 1, r); J2x}@p
else n7;jME/!
insertSort(data, mid + 1, r - mid); D%3$"4M7!
@R`6jS_gK
for (i = l; i <= mid; i++) { FD E?O]^
temp = data; #lqH/>`>
} 7P(o!%H
for (j = 1; j <= r - mid; j++) { UVlB=
temp[r - j + 1] = data[j + mid]; .up[wt gN
} zOSUYn
int a = temp[l]; _PPC?k{z!
int b = temp[r]; r3' DXP
for (i = l, j = r, k = l; k <= r; k++) { u(1m#xr8$
if (a < b) { |(Wwh$
data[k] = temp[i++]; $#n9C79Z@
a = temp; %>+lr%B
} else { :^`j:B
data[k] = temp[j--]; &D[M<7T
b = temp[j]; 55.2UN
} 53aJnxX
} /y{fDCC
} bf.+Ewb(
\9p.I?=
/** (Q||5
* @param data S[9b I&C
* @param l 2"a%%fv
* @param i "2C}Pr,p8
*/ {ST8'hY
private void insertSort(int[] data, int start, int len) { rMJ@oc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SbX^DAlB1
} :kI[Pf!z
} /cdLMm:
} PO'K?hVS^w
} N)H+Ng[
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堆排序： ={cM6F}a@
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package org.rut.util.algorithm.support; <astIu Au
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import org.rut.util.algorithm.SortUtil; y'2w*?
L T`T~|pz
/** @qcUxu4
* @author treeroot yO8@.-jb
* @since 2006-2-2 \NDW@!X
* @version 1.0 7lF;(l^Z>}
*/ ts[8;<YD
public class HeapSort implements SortUtil.Sort{ 6v:L8t$"
)ZLj2H<
/* (non-Javadoc) w_`;Mn%p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [?<v|k
*/ 7W},5c
public void sort(int[] data) { t4;gY298
MaxHeap h=new MaxHeap(); ) xV>Va8)
h.init(data); ]S?G]/k}
for(int i=0;i h.remove(); !}P^O(oY
System.arraycopy(h.queue,1,data,0,data.length); ~yXDN4s
} k "7,-0gz
En-=z`j G
private static class MaxHeap{ 0nI*9
UjunIKX+
void init(int[] data){ !Y UT*
this.queue=new int[data.length+1]; t`}=~/#`X
for(int i=0;i queue[++size]=data; Wn;%B].I
fixUp(size); ?^-fivzS>
} 23=wz%tF
} {Gfsiz6
4s>L]! W$8
private int size=0; JT6Be8
90JWU$K
private int[] queue; UZiL NKc
$i8oLSRV
public int get() { AxJqLSfyb,
return queue[1]; :&$v.#
} Y~( 8<`^
j}@LiH'Q
public void remove() { Qd3ppJn
SortUtil.swap(queue,1,size--); OL#i!ia.
fixDown(1); >O24#!9XW
} D@68_sn
file://fixdown n}A!aC
private void fixDown(int k) { !YjxCx
int j; <C(o0u&/
while ((j = k << 1) <= size) { 0stc$~~v
if (j < size %26amp;%26amp; queue[j] j++; V+lF|CZb5
if (queue[k]>queue[j]) file://不用交换 "EMW'>&m
break; :p: C
SortUtil.swap(queue,j,k); fM"*;LN!N
k = j; 1]~w?)..'
} yTd8)zWq
} n:`f.jG |
private void fixUp(int k) { m?<E >-bI
while (k > 1) { %Rn*oV
int j = k >> 1; ?BfE*I$\h
if (queue[j]>queue[k]) ,n8\y9{G
break; m:?"|.]
SortUtil.swap(queue,j,k); 9/(jY$Ar
k = j; OQKeU0v
} ^r&)@R$V
} Wvr{l
(n*:LS=0
} ,.W7Z~z
6j<!W+~G
} !>`Fg>uy
MqAi}z%
SortUtil： b[<RcM{r}
Df^F)\7!N?
package org.rut.util.algorithm; /!?LBtqy
\]u;NbC]
import org.rut.util.algorithm.support.BubbleSort; }<0N)dpT
import org.rut.util.algorithm.support.HeapSort; >SK:b/i
import org.rut.util.algorithm.support.ImprovedMergeSort; 9dhEQ=K{3
import org.rut.util.algorithm.support.ImprovedQuickSort; Q# B0JT1
import org.rut.util.algorithm.support.InsertSort; rKrHd
import org.rut.util.algorithm.support.MergeSort; e(?w h
import org.rut.util.algorithm.support.QuickSort; l&qnqmW<
import org.rut.util.algorithm.support.SelectionSort; Tf86CH=)5
import org.rut.util.algorithm.support.ShellSort; K"0IWA
x)~i`$
/** : @gW3'
* @author treeroot t1#f*G5
* @since 2006-2-2 'w;J)_Yc2
* @version 1.0 W"~"R
*/ d.>O`.Mu)}
public class SortUtil { tuo'Uk)
public final static int INSERT = 1; dDYor-g>
public final static int BUBBLE = 2; Me+)2S 9
public final static int SELECTION = 3; EL *l5!Iu
public final static int SHELL = 4; s BuXwa
public final static int QUICK = 5; 'F1<m^
public final static int IMPROVED_QUICK = 6; -zH-9N*c
public final static int MERGE = 7; @a]`C $6
public final static int IMPROVED_MERGE = 8; ,+5!1>\
public final static int HEAP = 9; ^'vWv C
&9n=!S'Md
public static void sort(int[] data) { 9\r5&#<(I
sort(data, IMPROVED_QUICK); HM\}C.u
} ~VF?T~Kr_
private static String[] name={ eA9r M:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UXS+GAWU
}; Pv$O=N6-
(bogAi3<F
private static Sort[] impl=new Sort[]{ 6A} 45
new InsertSort(), ;sSRv9Xb
new BubbleSort(), fqm6Pd{:(
new SelectionSort(), VB+y9$Y'
new ShellSort(), j+3=&PkA.]
new QuickSort(), 0mT.J~}1v
new ImprovedQuickSort(), .!1E7\
new MergeSort(), XCO;t_%
new ImprovedMergeSort(), 8rjiW#
new HeapSort() TnQ"c)ta
}; EK$3T5e
g!DJW
public static String toString(int algorithm){ {>n\B~*,"C
return name[algorithm-1]; zX}t1:nc
} B'8/`0^n5
EN;s 8sC!
public static void sort(int[] data, int algorithm) { ]YWz;Z
impl[algorithm-1].sort(data); ?n(OH~@$i
} I> BGp4AQ
,v$Q:n|
public static interface Sort { :B 9>
public void sort(int[] data); ZfP$6%;_
} a(oa?OdJ
R]<N";-
public static void swap(int[] data, int i, int j) { kmT5g gy
int temp = data; 2R];Pv
data = data[j]; y$[:Kh,
data[j] = temp; "kd)dy95H
} x>$e*
} _=-B%m