[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; >tXufzW
} &dwI8@&
int i1=l; ~q'w),bE"Q
int i2=mid+1; t9$AvE#a!=
for(int cur=l;cur<=r;cur++){ ]sm0E@1
if(i1==mid+1) *1ID`o
data[cur]=temp[i2++]; Ul7pxzj
else if(i2>r) @> +^<
data[cur]=temp[i1++]; pZ@W6}
else if(temp[i1] data[cur]=temp[i1++]; /`j K
else OGE#wG"S
data[cur]=temp[i2++]; t`Y1.]@U
} Lv,ji_
} NejsI un%
k #,Gfs
} L8?Z!0D/h
w/^0tZ~
改进后的归并排序: SS45<!iy
npG+#z
package org.rut.util.algorithm.support; c^dl+-{Mc
=A6u=
import org.rut.util.algorithm.SortUtil; '^.=gTk
V5hlG =V
/** >r4Y\"/j
* @author treeroot 8Jib|#!
* @since 2006-2-2 'wT./&Z
* @version 1.0 B4*X0x
*/ 63y':g
public class ImprovedMergeSort implements SortUtil.Sort { hNR>Hy\
yoA*\V
private static final int THRESHOLD = 10; -;/@;W
A Eyr_!G,
/* 33v%e
* (non-Javadoc) F|n$0vQ*
* 9bzYADLI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YiI:uG!|D
*/ v&CO#vK5.
public void sort(int[] data) { b3 %&
int[] temp=new int[data.length]; Ph!KL\
mergeSort(data,temp,0,data.length-1); $.3CiM}~
} z*k3q`=>
G7kFo6Cb
private void mergeSort(int[] data, int[] temp, int l, int r) { %;B(_ht<-w
int i, j, k; vCU&yXGl
int mid = (l + r) / 2; i>kNz(*
if (l == r) :;hBq4h
return; 8HH.P`Vk#
if ((mid - l) >= THRESHOLD) ]B[/sqf
mergeSort(data, temp, l, mid); g:HbmXOBpj
else \A~I>x
insertSort(data, l, mid - l + 1); |"tV["a
if ((r - mid) > THRESHOLD) M;Mdz[Q
mergeSort(data, temp, mid + 1, r); Bc9|rlV,
else xUYN\Pc-
insertSort(data, mid + 1, r - mid); +G=C~X
8L9S^ '
for (i = l; i <= mid; i++) { -)->Jx:{
temp = data; pS|JDMo
} <x%my4M
for (j = 1; j <= r - mid; j++) { loqS?bC]
temp[r - j + 1] = data[j + mid]; ;ZqD60%\
} CsST-qxg
int a = temp[l]; ][$$ =
int b = temp[r]; gQ+_&'C
for (i = l, j = r, k = l; k <= r; k++) { j|$y)FBX
if (a < b) { Lw2YP[CR
data[k] = temp[i++]; E/ed0'|m
a = temp; ~BYEeUo;%v
} else { 3z/O`z
data[k] = temp[j--]; cdU >iB,
b = temp[j]; B=RKi\K6a
} J<P/w%i2
} bM3'm$34
} 2Nt]Nj`
Dil4ut-$
/** HjF'~n
* @param data }";hz*a
* @param l #.G>SeTn2}
* @param i {D2d({7
*/ jQwg)E+o;
private void insertSort(int[] data, int start, int len) { v'Py[[R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HIp {< M3
} Rx"VscB6z
} fS$Yl~-m?
} $;`2^L
} }y=n#%|i.
k3|9U'r!c
堆排序： b!tZbX#
o _,$`nEJ
package org.rut.util.algorithm.support; H&K)q5~
s].Cx4VQ
import org.rut.util.algorithm.SortUtil; 0#[Nfe*
RkXLE"G'
/** !\|@{UJk/
* @author treeroot FUv)<rK
* @since 2006-2-2 $YO]IK$
* @version 1.0 %^@0tT
*/ Fb4S/_ V
public class HeapSort implements SortUtil.Sort{ -){^ Q:u
d5W[A#}
/* (non-Javadoc) I:2jwAl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q]koj!mMl
*/ ++RmaZ
public void sort(int[] data) { sVl:EVv
MaxHeap h=new MaxHeap(); 'A@Oia1;{
h.init(data); C g,w6<7
for(int i=0;i h.remove(); g8@i_
System.arraycopy(h.queue,1,data,0,data.length); @P*P8v8:
} ).#D:eO[~
%;XuA*e
private static class MaxHeap{ C&K(({5O
E]Gq!fA&<
void init(int[] data){ ;0}"2aGY
this.queue=new int[data.length+1]; Z"8cGN'
for(int i=0;i queue[++size]=data; Cr\/<zy1-e
fixUp(size); O#Ax P}
} pDS4_u
} fHp#Gi3Lz
\Hx#p`B%
private int size=0; rlh6\Fa
g<jK^\eW
private int[] queue; si4=C
w0>)y-
public int get() { [~H`9Ab=
return queue[1]; 3mn-dKe((
} K?<Odw'k
ov.rHVeI
public void remove() { Yy;1N{dbT
SortUtil.swap(queue,1,size--); Z`h_oK#y15
fixDown(1); 20xGj?M
} wx7>0[zE
file://fixdown KD<`-b)7<
private void fixDown(int k) { 8pKPbi;(2
int j; !LSWg:Ev+
while ((j = k << 1) <= size) { #z5?Y2t7~^
if (j < size %26amp;%26amp; queue[j] j++; $f-pLF+x
if (queue[k]>queue[j]) file://不用交换 H0Xda.Y(
break; pNme jz:
SortUtil.swap(queue,j,k); E$fy*enON
k = j; {.'g!{SHp
} lk'jBl%
} Zl/+HU~
private void fixUp(int k) { z>#$#:Z4
while (k > 1) { ,(b~L<zN&
int j = k >> 1; E)SOcM)
if (queue[j]>queue[k]) d`*vJ#$>2
break; ApB'O;5
SortUtil.swap(queue,j,k); Z.f<6<gF
k = j; J\},o|WI
} F#9KMu<<cI
} `l@t3/
~oyPmIcb
} W| eG}`
Hd}t=6
} }=R|iz*,!
M4]|(A
SortUtil： 1Ee>pbd
1KEPD@0oxx
package org.rut.util.algorithm; [_GR'x'0x
M#IR=|P]
import org.rut.util.algorithm.support.BubbleSort; $9b6,Y_-
import org.rut.util.algorithm.support.HeapSort; jDR\#cGrZ
import org.rut.util.algorithm.support.ImprovedMergeSort; P=i |{vv(
import org.rut.util.algorithm.support.ImprovedQuickSort; l)eaIOyk
import org.rut.util.algorithm.support.InsertSort; dz DssAHy
import org.rut.util.algorithm.support.MergeSort; .j,&/y&
import org.rut.util.algorithm.support.QuickSort; >@\-m
import org.rut.util.algorithm.support.SelectionSort; !kYmrj**
import org.rut.util.algorithm.support.ShellSort; X*;p;N
W#/Ol59
/** +1A<kJ
* @author treeroot $:P~21,
* @since 2006-2-2 cA^7}}?e
* @version 1.0 XBBRB<l)
*/ :\cJvm
public class SortUtil { lKSI5d
public final static int INSERT = 1; 3@A k6Uh
public final static int BUBBLE = 2; s;)tLJ!
public final static int SELECTION = 3; ;<Q_4 V
public final static int SHELL = 4; b?^<';,5
public final static int QUICK = 5; "@Fxfd+Ot
public final static int IMPROVED_QUICK = 6; vdM\scO:
public final static int MERGE = 7; {uG_)GFr0
public final static int IMPROVED_MERGE = 8; 7~fl4*
public final static int HEAP = 9; A).AAr
79fg%cSb
public static void sort(int[] data) { +{*&I DW
sort(data, IMPROVED_QUICK); u-<s@^YG
} #.aLx$"a
private static String[] name={ 3Pq)RD|hn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rJxT)bR
}; g==^ioS}*
ZaV@}=Rd8
private static Sort[] impl=new Sort[]{ %?y`_~G
new InsertSort(), {hR23eE)#
new BubbleSort(), \/GY0s
new SelectionSort(), Gj?q+-d!(5
new ShellSort(), ]].21
new QuickSort(), O2B$c\pw
new ImprovedQuickSort(), h Nwb.[
new MergeSort(), U3QnWPt}>
new ImprovedMergeSort(), O*7~t17
new HeapSort() R["7%|RV
}; Fx\Re]~n
x]M1UBnMN
public static String toString(int algorithm){ 1jb@nxRjO
return name[algorithm-1]; f#+ h_1#
} /+7L`KPD
u?i1n=Ne
public static void sort(int[] data, int algorithm) { Q^OzFfR6
impl[algorithm-1].sort(data); S]a$w5ZP
} &!Vp'l\9
r~t7Z+PXF
public static interface Sort { _X/`4 G
public void sort(int[] data); z@j&vW
} }8e%s;C
lX7^LB
public static void swap(int[] data, int i, int j) { BcWReyO<M
int temp = data; 0]HIc
data = data[j]; 4#uoPkLK
data[j] = temp; VP&lWPA}\$
} 9p<l}h7g
} b/`'?| C