[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; Tbj}04;I
} q{XeRQ'/
int i1=l; /hYFOZ
int i2=mid+1; qT^0 %O:
for(int cur=l;cur<=r;cur++){ "4L_BJZ
if(i1==mid+1) y3ST0=>j}
data[cur]=temp[i2++]; ) ):w`^6
else if(i2>r) ({mlA`d]
data[cur]=temp[i1++]; 2Yg\<PsN
else if(temp[i1] data[cur]=temp[i1++]; Uy<n7*H
else 0RHjA&r3v
data[cur]=temp[i2++]; )CD-cz6n
} +8.1cDEH\
} I+rLKGZC
"QmlW2ysi
} P,)\#([vc
Je~`{n
改进后的归并排序: q>m[vvt"
2+|U!X
package org.rut.util.algorithm.support; x{3q'2
IZ@M K
import org.rut.util.algorithm.SortUtil; sOm&7A?
{j%7/T{
/** o`.5NUn
* @author treeroot %$F_oO7"
* @since 2006-2-2 Bp/25jy
* @version 1.0 #zg"E<
*/ (H-kWT
public class ImprovedMergeSort implements SortUtil.Sort { S"%W^)mZ
3-gy)5.xe
private static final int THRESHOLD = 10; r#w.yg4EX
0}q*s!
/* @;Xa&*
* (non-Javadoc) cG!dMab(
* B<jVo%og
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R) J/z
*/ Xz"xp8Hc(6
public void sort(int[] data) { 2U) 0k*
int[] temp=new int[data.length]; U98e=57N
mergeSort(data,temp,0,data.length-1); [s F/sa3
} Hd{@e6S
s} oD?h:T3
private void mergeSort(int[] data, int[] temp, int l, int r) { _f@nUv*
int i, j, k; sV`p3L8pl
int mid = (l + r) / 2; i!+0''i{#
if (l == r) <+: PTG/('
return; Xj$'i/=-+c
if ((mid - l) >= THRESHOLD) R_Uy.0=4
mergeSort(data, temp, l, mid); ycrM8Mu 3
else MI>_wG5P@
insertSort(data, l, mid - l + 1); HxNoV.q
if ((r - mid) > THRESHOLD) !Aw.)<teW
mergeSort(data, temp, mid + 1, r); R T/)<RT9
else SA{5A 1
insertSort(data, mid + 1, r - mid); ddw^oU
!BN@cc[%
for (i = l; i <= mid; i++) { J#?z/3v(
temp = data; 8b< 'jft
} !fG}<6&i
for (j = 1; j <= r - mid; j++) { .QB)Y* z
temp[r - j + 1] = data[j + mid]; %VS+?4ww
} M9KoQS
int a = temp[l]; HJ;!'@
int b = temp[r]; n4o}}tI
for (i = l, j = r, k = l; k <= r; k++) { 2I{kLN1TY
if (a < b) { m:c .dei5
data[k] = temp[i++]; +O@|bd\
a = temp; ;]T;mb>
} else { kNoS% ?1,
data[k] = temp[j--]; )pG*_q
b = temp[j]; A }d\ND
} /-Nq DRmJ
} <P#:dS%r
} [I=1
TiD|.a8S
/** 1B~[L 5p9
* @param data 5?|yYQM0tK
* @param l =}2k+v-B
* @param i d*l2x[8}g-
*/ =a(]@8$!1
private void insertSort(int[] data, int start, int len) { PBgU/zVn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w/@ tH
} *V{Y.`\
} KB8_yo{y
} yo :63CPP
} F-GH?sfvi
"6>+IF
堆排序： 6@Ir|o
B4x@{rtER
package org.rut.util.algorithm.support; Wx|De7*
uVa`2]NV r
import org.rut.util.algorithm.SortUtil; K6N+0#
&)!4rABn
/** _J>!K'Dz
* @author treeroot .Xk#Cwm'
* @since 2006-2-2 a$$aM2.2
* @version 1.0 Dmr3r[
*/ nRcy`A%
public class HeapSort implements SortUtil.Sort{ U;LX"'}
d t^Hd]+^\
/* (non-Javadoc) 8BX9JoDi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?7TuE!!M
*/ QUWx\hqE
public void sort(int[] data) { S.!K
MaxHeap h=new MaxHeap(); -AwkP
h.init(data); ^>#@qMw
for(int i=0;i h.remove(); xPzBbe
System.arraycopy(h.queue,1,data,0,data.length); 9EWw
} @P<aTRy,f
dlBr2 9
private static class MaxHeap{ N[kl3h%q
lCGEd 3
void init(int[] data){ %:\GYs(Y
this.queue=new int[data.length+1]; A}_0iwG
for(int i=0;i queue[++size]=data; VbX$\Cs:
fixUp(size); ;Hn>Ew
} QI`&N(n
} uLrZl0%HT~
>9t+lr1
private int size=0; a"phwCc"%
0](V@F"~
private int[] queue; JdX!#\O
t!o=-k
public int get() { K9) |b`E=
return queue[1]; d)L,kzN
} bZu2.?{
tkW7wP;
public void remove() { ~9c jc
SortUtil.swap(queue,1,size--); fHXz{,?/w
fixDown(1); wQojmmQ
} LrdX^_,nt
file://fixdown 5Vlm?mPU
private void fixDown(int k) { L | #"Yn
int j; _C@<*L=Q
while ((j = k << 1) <= size) { 90gKGyxF
if (j < size %26amp;%26amp; queue[j] j++; VN]j*$5
if (queue[k]>queue[j]) file://不用交换 o_cAelI[!
break; xmHW,#%ui\
SortUtil.swap(queue,j,k); ,soXX_Y>
k = j; /@@?0xjX
} \omfWWpK
} UD^=@?^7
private void fixUp(int k) { @*iT%p_L
while (k > 1) { [uFv_G{H
int j = k >> 1; 'W/AYF^5
if (queue[j]>queue[k]) +{WZpP},v
break; jm,:jkr
SortUtil.swap(queue,j,k); :b<<
k = j; C^*}*hYk$
} -+kTw06_C
} @-.Tgpe@a
;R^=($X
} _g6H&no[
k]S`A,~
} .5iXOS0 G
yH]w(z5Z
SortUtil： j){0>O.V
PKYm{wO-
package org.rut.util.algorithm; U%KsD 4B
fDwqu.K
import org.rut.util.algorithm.support.BubbleSort; YZz8xtM<2
import org.rut.util.algorithm.support.HeapSort; !jRs5{n^Ol
import org.rut.util.algorithm.support.ImprovedMergeSort; pXK-,7-
import org.rut.util.algorithm.support.ImprovedQuickSort; (} Y|^uM,
import org.rut.util.algorithm.support.InsertSort; ,<U
import org.rut.util.algorithm.support.MergeSort; U[NQ"
import org.rut.util.algorithm.support.QuickSort; __[bKd.
import org.rut.util.algorithm.support.SelectionSort; G@rV9
import org.rut.util.algorithm.support.ShellSort; fT5vO.a
.cs4AWml<
/** vUB*Qm]Y\
* @author treeroot 'S6JpWG1
* @since 2006-2-2 vxXrVPU3
* @version 1.0 =/(R_BFna
*/ wSG!.Ejc7
public class SortUtil { J1Oe`my
public final static int INSERT = 1; lSBu,UQP
public final static int BUBBLE = 2; r_pZK(G%
public final static int SELECTION = 3; )V9wU1.
public final static int SHELL = 4; nS]Ih0(K
public final static int QUICK = 5; o^+g2;Ro
public final static int IMPROVED_QUICK = 6; bH.f4-.u>)
public final static int MERGE = 7; fn Pej?f:
public final static int IMPROVED_MERGE = 8; 5wbR}`8
public final static int HEAP = 9; q=;U(,Y
`]5t'Ps
public static void sort(int[] data) { 7&1dr
sort(data, IMPROVED_QUICK); =qS\+
} (4C_Ft*~j
private static String[] name={ /,JL \b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `\Te,
}; d#:7V%]dp
{r_x\VC=p
private static Sort[] impl=new Sort[]{ XF`?5G~~#
new InsertSort(), >!%+)
new BubbleSort(), ~!"z`&
new SelectionSort(), Wn5xX5H C
new ShellSort(), s\q m
new QuickSort(), q!<n\X3]u
new ImprovedQuickSort(), jKp79].
new MergeSort(), :nxBM#:xu
new ImprovedMergeSort(), hf5+$^RZ
new HeapSort() MR.c?P?0Q
}; (gb vInZ
B0m2SUC,H
public static String toString(int algorithm){ &cT@MV5
return name[algorithm-1]; `bjPOA(g
} CB>*(Mu
"\rR0V!wA
public static void sort(int[] data, int algorithm) { E6clVa
impl[algorithm-1].sort(data); K#[z5
} 8 G:f[\^
5wa!pR\c
public static interface Sort { (XQ:f|(
public void sort(int[] data); *q0vp^?
} +H "j-:E@t
Rz=wInFs
public static void swap(int[] data, int i, int j) { \ 6 :7
int temp = data; <MgC7S2I
data = data[j]; m-HBoN
data[j] = temp; tWITr
} b:W x[+
} AQgm]ex<