[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; `&=%p|
} HHx5VI
int i1=l; ]fY:+Ru
int i2=mid+1; :LuA6
for(int cur=l;cur<=r;cur++){ # 9bw'm
if(i1==mid+1) CM~x1f*v
data[cur]=temp[i2++]; f:8!@,I
else if(i2>r) =&g:dX|q8
data[cur]=temp[i1++]; @[D5{v)S
else if(temp[i1] data[cur]=temp[i1++]; C,ldi"|
else vo#$xwm1
data[cur]=temp[i2++]; h/5V~ :)
} T pCXe\W
} rE"FN~9P
<DMm [V{
} $m)eO8S+
qW3XA$g|j'
改进后的归并排序: ^Cp;#|g,
<DqFfrpc
package org.rut.util.algorithm.support; zq5N@dF
&xr(Kb
import org.rut.util.algorithm.SortUtil; &#C|
cm!vuoB~~
/** hXH+C-%{
* @author treeroot *k\;G?
* @since 2006-2-2 P=_W{6
* @version 1.0 VVF9X(^rQ
*/ b 2\J<Nw
public class ImprovedMergeSort implements SortUtil.Sort { eLH=PDdO
A _7I0^
private static final int THRESHOLD = 10; G=e'H-
"Ml#,kU<T
/* YxnZ0MY
* (non-Javadoc) DW,Z})9
* s&%r?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #-L<
*/ 'QpDx&~QP
public void sort(int[] data) { 87pu\(,'
int[] temp=new int[data.length]; HII@Ed f?
mergeSort(data,temp,0,data.length-1); uEsF 8
} U*EBH
;Gp9 ?0
private void mergeSort(int[] data, int[] temp, int l, int r) { }w=|"a|,
int i, j, k; a'q&[08
int mid = (l + r) / 2; {h|kx/4{m
if (l == r) Ct(^nn$A
return; RSeav
if ((mid - l) >= THRESHOLD) n1x3q/~
mergeSort(data, temp, l, mid); Vf(..8
else OHY|< &*
insertSort(data, l, mid - l + 1); aEEb1Y
if ((r - mid) > THRESHOLD) 8VpmcGvc3
mergeSort(data, temp, mid + 1, r); ;5|d[r}k3
else ,-n_(U
insertSort(data, mid + 1, r - mid); [IyC}lSW^-
nBd(pOe
for (i = l; i <= mid; i++) { >TGc0 z+
temp = data; )eX{a/Be
} xxgdp. (
for (j = 1; j <= r - mid; j++) { N5MWMN[6aP
temp[r - j + 1] = data[j + mid]; 29z@ !
} XB[EJGaX
int a = temp[l]; B$q5/L$}
int b = temp[r]; DLq'V.M:
for (i = l, j = r, k = l; k <= r; k++) { .5~3D97X&
if (a < b) { -Zg.o$
data[k] = temp[i++]; Lm^vS u
a = temp; Rto/-I0l
} else { xgsEe3|
data[k] = temp[j--]; /+<G@+(
b = temp[j]; 6 G,cc
} zo ]-,u
} V\c`O
} x=W5e ^0?
1Si$Q
/** -LFk7a
* @param data aMK\&yZD
* @param l z2A,*|I
* @param i 9+Wf*:*EW
*/ Ln4Dq[M
private void insertSort(int[] data, int start, int len) { f(EO|d^u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1#zD7b~
} i\>?b)a>
} ^= kr`5
} M^n^wz
} V_4=0(
MHCwjo"
堆排序： uesIkJ^Q[
=QwT)KRB%
package org.rut.util.algorithm.support; dA#'HMh@
Nc^:v/(P
import org.rut.util.algorithm.SortUtil; 7 $dibTER
qnU`Q{
/** !Ks<%; rb
* @author treeroot NiVZ=wEp,
* @since 2006-2-2 tt&{f <*
* @version 1.0 /RF&@NJE5
*/ B}I9+/|{
public class HeapSort implements SortUtil.Sort{ w,1*dn
B?d+^sz]
/* (non-Javadoc) K:$GmV9o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GCrsf
*/ EO/TuKt
public void sort(int[] data) { ,H/BW`rL]#
MaxHeap h=new MaxHeap(); N.V5>2
h.init(data); $%1oZ{&M
for(int i=0;i h.remove(); T'5MO\
System.arraycopy(h.queue,1,data,0,data.length); +^$E)Ol
} S<I9`k G
[1e/@eC5
private static class MaxHeap{ ^_=bssaOd
b:x~Jz#%2
void init(int[] data){ 8wCB}qC
this.queue=new int[data.length+1]; ,}^FV~
for(int i=0;i queue[++size]=data; Rz<'&Z>;
fixUp(size); "!#KQ''R
} yi<H }&
} q^}iXE~
k7nke^,|
private int size=0; dFk$rr>q
#_'^oGz`
private int[] queue; h\|T(597.
>4?735f=x
public int get() { d-I&--"ju
return queue[1]; lgefTT GX)
} <,t6A?YoMP
Go7 oj'"
public void remove() { Vo(bro4ZQi
SortUtil.swap(queue,1,size--); 5QG?*Z~?7
fixDown(1); i&L!?6 5-f
} =pb ru=/
file://fixdown xeRoif\4c
private void fixDown(int k) { SM.KM_%K
int j; L}tP_ *
while ((j = k << 1) <= size) { I9sQPa
if (j < size %26amp;%26amp; queue[j] j++; .bNG:y>
if (queue[k]>queue[j]) file://不用交换 =GC,1WVEqV
break; u"U7aYGkY
SortUtil.swap(queue,j,k); cE*d(g
k = j; 'Z6x\p
} 2GRv%:rZ
} v+DXs!O{
private void fixUp(int k) { NqN}] nu6
while (k > 1) { gq.l=xS
int j = k >> 1; *$Z?Owl7
if (queue[j]>queue[k]) S3y(' PeF
break; o}Q3mCB
SortUtil.swap(queue,j,k); *dxE (dP
k = j; l-8rCaq&J
} pE{Ecrc3|
} B#o6UO\
R-Gg= l5
} :;w#l"e7<
=DXN`]uN
} 4 udW6U
qy/t<2'
SortUtil： Wfsd$kN6{
be HEAQ
package org.rut.util.algorithm; d_Z?i#r0l
=F46v{la
import org.rut.util.algorithm.support.BubbleSort; 3yLJWHO%W
import org.rut.util.algorithm.support.HeapSort; ~L"?C
import org.rut.util.algorithm.support.ImprovedMergeSort; =tc!"{
import org.rut.util.algorithm.support.ImprovedQuickSort; )< p ~
import org.rut.util.algorithm.support.InsertSort; bg^<e}{<H
import org.rut.util.algorithm.support.MergeSort; z6 .^a-sU5
import org.rut.util.algorithm.support.QuickSort; _W>xFBy
import org.rut.util.algorithm.support.SelectionSort; HnKXO
import org.rut.util.algorithm.support.ShellSort; QVkrhwp
e. R9:
/** ggy9euWV
* @author treeroot CsN^u H
* @since 2006-2-2 #@P0i^pFTB
* @version 1.0 f8)fm2^09
*/ BR:Mcc
public class SortUtil { eaDG7+iS
public final static int INSERT = 1; D=}\]Krmay
public final static int BUBBLE = 2; #j)"#1IE2W
public final static int SELECTION = 3; BCh|^Pk
public final static int SHELL = 4; ">vi=Tr
public final static int QUICK = 5; wQ81wfr1:
public final static int IMPROVED_QUICK = 6; No*[@D]g
public final static int MERGE = 7; H`rd bE
public final static int IMPROVED_MERGE = 8; (btmg<WT"
public final static int HEAP = 9; tNz(s)
es<
public static void sort(int[] data) { Yw_!40`
sort(data, IMPROVED_QUICK); ^95njE`>t`
} E[<*Al+N
private static String[] name={ l_Zx'm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^ U~QQ
}; gmZ] E45
\85~~v@
private static Sort[] impl=new Sort[]{ 664D5f#EJ
new InsertSort(), /|isRh|
new BubbleSort(), \J(kM,ZJ
new SelectionSort(), 9T0g%&
new ShellSort(), `yO'-(@"gY
new QuickSort(), BO.Db``
new ImprovedQuickSort(), q`UaJ_7
new MergeSort(), ~yJJ00%
new ImprovedMergeSort(), w@LLxL>Y
new HeapSort() Gr#WD=I-}
}; ;3o7>yEv
`UTUrM
public static String toString(int algorithm){ <(i5hmuVd
return name[algorithm-1]; ^,aI2vC
} ER0B{b
`4g}(-
public static void sort(int[] data, int algorithm) { c:""&>Z
impl[algorithm-1].sort(data); ri6KD
} <,D*m+BWn
_tE55X&
public static interface Sort { 8 #:k
public void sort(int[] data); a4pewg'
} /i#";~sO
2+ywl}9
public static void swap(int[] data, int i, int j) { 5]n\E?V'L
int temp = data; lSc=c-iOv
data = data[j]; :aH5=@[!y
data[j] = temp; gFsqCx<q
} Eihn%Esa
} KD?b|y@