[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Me=CSQqf<
} \?jeWyo
int i1=l; WD1G&5XP
int i2=mid+1; ,Jd ',>3
for(int cur=l;cur<=r;cur++){ PG,_^QGCX
if(i1==mid+1) A]XZnQ
data[cur]=temp[i2++]; W^G>cC8.L
else if(i2>r) &gjF4~W]
data[cur]=temp[i1++]; %Qj;,#z
else if(temp[i1] data[cur]=temp[i1++]; %Q.&ZhB
else ZcaX'5}!S
data[cur]=temp[i2++]; F+@5C:<?
} s>^dxF!+
} e[8LmuIZ
v'e[GB0
} ;X?mmv'
X,LD
改进后的归并排序: 7e<c$t#H
p ZZc:\fJ
package org.rut.util.algorithm.support; hXA6D)
]8T!qS(UJd
import org.rut.util.algorithm.SortUtil; sVl-N&/
Ps 8%J;
/** CP6LHkM9
* @author treeroot s&NX@
* @since 2006-2-2 {uHU]6d3qy
* @version 1.0 v$N|"o""
*/ @WI2hHD
public class ImprovedMergeSort implements SortUtil.Sort { J&T.(
'{(UW.Awo
private static final int THRESHOLD = 10; 0X^Ke(/89
;g~TWy^o
/* /r=tI)'$
* (non-Javadoc) ~{Mn{
* 3YZs+d.;ib
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pZeE61c/
*/ }X=[WCKU
public void sort(int[] data) { ?yj6CL(,
int[] temp=new int[data.length]; I6Ce_|n ?k
mergeSort(data,temp,0,data.length-1); "U\4:k`:
} Jej` ;I
J.8IwN1E
private void mergeSort(int[] data, int[] temp, int l, int r) { W16,Alf:
int i, j, k; AW,53\ 0
int mid = (l + r) / 2; 5:kH;/U
if (l == r) 0$-xw
return; HvVts\f
if ((mid - l) >= THRESHOLD) NM06QzE
mergeSort(data, temp, l, mid); k70|'*Kh
else B` k\EL'
insertSort(data, l, mid - l + 1); HB7;0yt`:
if ((r - mid) > THRESHOLD) xl#LrvxI
mergeSort(data, temp, mid + 1, r); ,%)6jYHRw
else T,VY.ep/
insertSort(data, mid + 1, r - mid); &cu lbcz
)4&cph';
for (i = l; i <= mid; i++) { -UD\;D?$
temp = data; qv@$ZLR
} ; k)@DX
for (j = 1; j <= r - mid; j++) { 3:C oZ
temp[r - j + 1] = data[j + mid]; *Q,0W:~-
} z-b*D}&
int a = temp[l]; K=,F#kn
int b = temp[r]; 3#TV5+x*"`
for (i = l, j = r, k = l; k <= r; k++) { =X.9,$Y
if (a < b) { M6}3wM*4
data[k] = temp[i++]; '60 L~`K
a = temp; K5XK%Gl"
} else { *;Ed*ibf
data[k] = temp[j--]; DrO2y
b = temp[j]; ?!`=X>5
} s%W<dDINl
} sx`O8t
} QV&D l_
67VT\f
/** di>cMS 4 c
* @param data L*~J%7
* @param l 19j+lCSvH
* @param i 1+U
*/ m`FNIY
private void insertSort(int[] data, int start, int len) { Zib)P&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); />9OR
} lHhUC16>
} z d-Tv`L#
} EMfdBY5
} EeF'&zE-
ANps1w#TP
堆排序： nTz6LVF
rhb@FE)Mc
package org.rut.util.algorithm.support; $9ky{T?YG
U~ck!\0&T
import org.rut.util.algorithm.SortUtil; q@xBJ[IM
0JJS2oY/
/** gR}35:$Z-
* @author treeroot }~Af/
* @since 2006-2-2 ?IGVErnJJC
* @version 1.0 _`pD`7:aI^
*/ 6MxKl D7kl
public class HeapSort implements SortUtil.Sort{ 14"J d\M8
Jyqc2IH
/* (non-Javadoc) 1M}&ZH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #2EI\E&$
*/ !1G."fo
public void sort(int[] data) { S!sqbLrBn
MaxHeap h=new MaxHeap(); W<E47
h.init(data); h@LHRMO
for(int i=0;i h.remove(); q|LDo~H
System.arraycopy(h.queue,1,data,0,data.length); Co3:*nbRv
} 17OH]
4~N[%>zJ
private static class MaxHeap{ C|o`k9I#
tT79p.z B
void init(int[] data){ w#g#8o>'
this.queue=new int[data.length+1]; P';?YV0
for(int i=0;i queue[++size]=data; @, Wvvh
fixUp(size); %3$*K\Ai
} Vb'7>
} DHY@akhrK
!eUDi(
private int size=0; K/}rP[H
bpxeznz
private int[] queue; P8?Fm`
pm9%%M$
public int get() { gB4U*D0[e~
return queue[1]; V}zEK0n(6
} wX*K]VMn
`3Uj{w/Q:L
public void remove() { yOwA8^q
SortUtil.swap(queue,1,size--); c~v~2DM
fixDown(1); ?Oc{bF7
} Ck/F9(
file://fixdown 2~t[RY
private void fixDown(int k) { ]$,UPR/3
int j; UAyC.$!
while ((j = k << 1) <= size) { m{7(PHpw
if (j < size %26amp;%26amp; queue[j] j++; Ogp"u b8
if (queue[k]>queue[j]) file://不用交换 \~5C7^_
break; S*sT] J`!
SortUtil.swap(queue,j,k); !Lh^oPT"I
k = j; "kA*Vc#
} m-jHze`D3
} E~AjK'Z
private void fixUp(int k) { D91e\|]
while (k > 1) { 3q?\r` a
int j = k >> 1; T]?n)L,2
if (queue[j]>queue[k]) "hy.GWF|*
break; 0pSmj2/,.
SortUtil.swap(queue,j,k); @GvztVYo
k = j; Z*FrB58
} K_ci_g":
} C*G=cs\i
D3x/OyG(
} q@jq0D)g
k`x=D5s\
} YOJ6w
x1BobhU~Zl
SortUtil： [S@}T zE
0V!l,pg
package org.rut.util.algorithm; 1DA1N<'
{Ions~cO)
import org.rut.util.algorithm.support.BubbleSort; T_lsGu/
import org.rut.util.algorithm.support.HeapSort; ymNnkFv
import org.rut.util.algorithm.support.ImprovedMergeSort; NVl [kw
import org.rut.util.algorithm.support.ImprovedQuickSort; zR32PG>9
import org.rut.util.algorithm.support.InsertSort; yu;SH[{Wi
import org.rut.util.algorithm.support.MergeSort; _kY#D;`:r
import org.rut.util.algorithm.support.QuickSort; W.w)H@]7m
import org.rut.util.algorithm.support.SelectionSort; r lKlpl
import org.rut.util.algorithm.support.ShellSort; U`]T~9I
G5FaYL.7
/** ZKdeB3D
* @author treeroot gp-T"l
* @since 2006-2-2 nIvJrAm4k
* @version 1.0 5H9r=a
*/ C-?!S
public class SortUtil { :#lIx%l
public final static int INSERT = 1; {vE(l'
public final static int BUBBLE = 2; aceZ3U>W
public final static int SELECTION = 3; C8L'si
public final static int SHELL = 4; +L=*:e\j
public final static int QUICK = 5; n\ Hs@.
public final static int IMPROVED_QUICK = 6; >~\89E02
public final static int MERGE = 7; MJ\eh>v&
public final static int IMPROVED_MERGE = 8; %riK+
public final static int HEAP = 9; ZY56\qcY
d;+[i
public static void sort(int[] data) { Zx$ol;Yd
sort(data, IMPROVED_QUICK); W#Qmv^StZ
} _aPh(qprc
private static String[] name={ 5p +ZD7jK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3or\:
}; #YSF&*
&ciN@nJ|$z
private static Sort[] impl=new Sort[]{ :ah 5`nmPO
new InsertSort(), [Ym
new BubbleSort(), Rl6\#C*
new SelectionSort(), Vj!rT <@
new ShellSort(), wP/A^Rs
new QuickSort(), Eaqca{%/^
new ImprovedQuickSort(), ?J,AB #+
new MergeSort(), Cbs5dn(Y
new ImprovedMergeSort(), _|''{kj(
new HeapSort() 'r\ V.4
}; WGAXIQ
!7d*v3)d
public static String toString(int algorithm){ %5*@l vy
return name[algorithm-1]; U'*t~x<
} > MG>=A
UgN28YrW
public static void sort(int[] data, int algorithm) { -!({BH-M_
impl[algorithm-1].sort(data); pDhse2
} \sA*V%n
_U{&@}3
public static interface Sort { &J!aw
public void sort(int[] data); 6q>+!kXh
} [/_+>M
=\t /u
public static void swap(int[] data, int i, int j) { F6hmku>\1
int temp = data; A!63p$VT;
data = data[j]; )J(q49
data[j] = temp; .4l/_4,s_
} #Z~C`n u
} %5\3Aw