[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& x{
} j9L+.UVI,
int i1=l; C(%5,|6
int i2=mid+1; ,rl <ye*&
for(int cur=l;cur<=r;cur++){ RfKxwo|M<
if(i1==mid+1) Bu>yRL=*
data[cur]=temp[i2++]; 'bY|$\I
else if(i2>r) ;ijfI
data[cur]=temp[i1++]; ~RR_[t2Z
else if(temp[i1] data[cur]=temp[i1++]; EH!EyNNb
else o7 -h'b-
data[cur]=temp[i2++]; C"m0"O>
} tpx3:|
} <,]CVo
}Bod#|`
} DRmh(T
;u-< {2P
改进后的归并排序: ~cg+BAfu
cwW~ *90#
package org.rut.util.algorithm.support; 5Ret,~Vs9|
I3E8vi%B.
import org.rut.util.algorithm.SortUtil; zC>(!fJqq
CK`3
/** Kp=3\)&
* @author treeroot %Ty {1'o
* @since 2006-2-2 9q,JqB
* @version 1.0 JU%yqXO
*/ m{yNnJ3O
public class ImprovedMergeSort implements SortUtil.Sort { buM>^A"
hr}R,BR|
private static final int THRESHOLD = 10; uA}FuOE6
[;LPeO
/* AU?YZEAei
* (non-Javadoc) <n~g+ps
* ;eEtdoy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u(G;57ms
*/ xg5@;p
public void sort(int[] data) { au}0PnA;
int[] temp=new int[data.length]; E,?aBRxy
mergeSort(data,temp,0,data.length-1); AQNx%
} fD}]Mi:V
Hr,gV2n
private void mergeSort(int[] data, int[] temp, int l, int r) { FEi,^V
int i, j, k; Ly/~N/<\
int mid = (l + r) / 2; _j<M}
if (l == r) iuk8c.TAR
return; mS;Q8Crh
if ((mid - l) >= THRESHOLD) VKfHN_m*
mergeSort(data, temp, l, mid); /ykxVCvAt
else {kO:HhUg
insertSort(data, l, mid - l + 1); J2k'Ke97o
if ((r - mid) > THRESHOLD) wU3ica&[
mergeSort(data, temp, mid + 1, r); 5OqsnL_V
else tZBE& :l
insertSort(data, mid + 1, r - mid); #w?%&,Kp
z)y(31K<1
for (i = l; i <= mid; i++) { exN#!&;
temp = data; oW1olmpp=
} 9v3Nba
for (j = 1; j <= r - mid; j++) { &$Ip$"H
temp[r - j + 1] = data[j + mid]; nPX'E`ut-V
} [&kk
int a = temp[l]; EBE>&{%$^
int b = temp[r]; v&,VC~RN-J
for (i = l, j = r, k = l; k <= r; k++) { ]T$w7puaJ
if (a < b) { QMpA~x_m
data[k] = temp[i++]; (eIxU&o'
a = temp; Y0C<b*!"ST
} else { MZMv.OeYt,
data[k] = temp[j--]; @y2Bq['
b = temp[j]; >oYwzK0&
} $[;eb,
} \D k^\-
} =y/Lbe}:
hpes
/** t4W0~7
* @param data 2Sd6b 2-
* @param l &`y_R'
* @param i {YLJKu!M
*/ UdgI<a~`k6
private void insertSort(int[] data, int start, int len) { Uy'ZL(2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); " yl"A4p S
} JKv4}bv
} n&{N't
} R2f,a*>
} .ihn@eg
I,Y^_(JW
堆排序： 4tu>~ vOE
=U|SK"oO
package org.rut.util.algorithm.support; cDol o1*
|L-juT X9
import org.rut.util.algorithm.SortUtil; (D3m5fO
@ MoMU
/** A+*(Pds
* @author treeroot GB Un" _J
* @since 2006-2-2 ?Og;W9i
* @version 1.0 D"aQbQP
*/ 6j![m+vo%
public class HeapSort implements SortUtil.Sort{ .y/?~+N^
j-\u_#kx%
/* (non-Javadoc) 2_DtzY:=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oQB1fs
*/ 'B:De"_(N
public void sort(int[] data) { Q%d[U4@
MaxHeap h=new MaxHeap(); E1[%~Cpw*
h.init(data); 3ZZI1_j
for(int i=0;i h.remove(); KywT Oq
System.arraycopy(h.queue,1,data,0,data.length); P?ol]MwaB
} z1A-EeT
!.N=Y;@lY
private static class MaxHeap{ 01w/,r
$l"(tB7d
void init(int[] data){ 0tyU%z{RV
this.queue=new int[data.length+1]; Li$k<AM
for(int i=0;i queue[++size]=data; 3{E}^ve
fixUp(size); pDN,(Ip
} #>NZN1
} 2Rt ZTn
@3D%i#2o&[
private int size=0; zOp"n\
S(xA}0]
private int[] queue; i<![i5uAI
f 8U;T$)
public int get() { j0M;2 3@[
return queue[1]; YR#1[fe*_
} 0M.[) @
6-}9m7#Y
public void remove() { -^N '18:
SortUtil.swap(queue,1,size--); %"B$I>h
fixDown(1); ^el:)$
} j KK48S
file://fixdown ^jC0S[csw2
private void fixDown(int k) { (P_+m#
int j; AIo;\35
while ((j = k << 1) <= size) { |%9~W^b
if (j < size %26amp;%26amp; queue[j] j++; k{8N@&D
if (queue[k]>queue[j]) file://不用交换 pp_ddk
break; l)bUHh5[
SortUtil.swap(queue,j,k); pswppC6f
k = j; $nN$"
} }e w?{
} _"TG:RP
private void fixUp(int k) { 69L&H!<i:
while (k > 1) { ]kvE+m&p}^
int j = k >> 1; 3<lDsb(}0A
if (queue[j]>queue[k]) yV`vu/3K
break; /iy/2x28>
SortUtil.swap(queue,j,k); Vngi8%YWp
k = j; > [7vXm4
} 3EdPKM j&
} :eO0{JN4T
nQC[[G*x
} G_RK3E[FK
{QJ`.6Kt
} zE{zX@
J0o[WD$Ax
SortUtil： _l<"Qqt
[ j_jee
package org.rut.util.algorithm; ,kI1"@Tu
iBt5aUt
import org.rut.util.algorithm.support.BubbleSort; a!.8^:B&
import org.rut.util.algorithm.support.HeapSort; *QJ/DC$
import org.rut.util.algorithm.support.ImprovedMergeSort; oKiu6=
import org.rut.util.algorithm.support.ImprovedQuickSort; t@v8>J%K
import org.rut.util.algorithm.support.InsertSort; ([A;~ p;n
import org.rut.util.algorithm.support.MergeSort; _9dV 3I
import org.rut.util.algorithm.support.QuickSort; Adm`s .
import org.rut.util.algorithm.support.SelectionSort; MvA_tRO
import org.rut.util.algorithm.support.ShellSort; ~Fh(4'
7tQiKrhp
/** x(Z@R\C-a
* @author treeroot =>U~ligu
* @since 2006-2-2 7;V5hul
* @version 1.0 }M@pdE
*/ L K$hV"SYb
public class SortUtil { J/ ~]A1fP6
public final static int INSERT = 1; }I0^nv1
public final static int BUBBLE = 2; /e,lD)
public final static int SELECTION = 3; Hqk2W*UTl
public final static int SHELL = 4; )sr]}S0
public final static int QUICK = 5; xYq8\9Qb
public final static int IMPROVED_QUICK = 6; qYs6PLC
public final static int MERGE = 7; 1zffPC8jl
public final static int IMPROVED_MERGE = 8; c1f6RCu$b
public final static int HEAP = 9; '_%Jw:4k
+J}M$eQ
public static void sort(int[] data) { 8,Z0J
sort(data, IMPROVED_QUICK); u[u=:Y+
} ,b8AB_yw
private static String[] name={ \v<}{\.|$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -$rfu
}; {_JLmyaerZ
f\JyN@w+
private static Sort[] impl=new Sort[]{ hV%l}6yS&
new InsertSort(), _<$=n6#
new BubbleSort(), \`^jl
new SelectionSort(), +y2*[
new ShellSort(), Vl%k:
new QuickSort(), aap:~F{]X
new ImprovedQuickSort(), i8]r}a
new MergeSort(), ;-F#a+2]!
new ImprovedMergeSort(), -MZ Eli g
new HeapSort() pJIH_H
}; ??Lxb% 7R
dK-G%5)r
public static String toString(int algorithm){ e-WaK0Ep
return name[algorithm-1]; )8_0d)
} 7g$t$cZby,
fHiCuF
public static void sort(int[] data, int algorithm) { mTt 9 o9E
impl[algorithm-1].sort(data); Kj7Osqu2bE
} hH\(>4l
`@90b4u
public static interface Sort { l40$}!!<
public void sort(int[] data); 6eBQ9XV
} We`axkC
5D#*lMSP"'
public static void swap(int[] data, int i, int j) { mMR[(
int temp = data; 9D@Ez"xv
data = data[j]; P%.5xYn
data[j] = temp; 6\`,blkX
} mnePm{
} $T6<9cB@