[JAVA]用Java实现的各种排序

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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; /'E+(Y&:J
} $${ebt
int i1=l; c@ En4[a'
int i2=mid+1; *ok89ad
for(int cur=l;cur<=r;cur++){ O<f_-n@G|
if(i1==mid+1) JU<<,0
data[cur]=temp[i2++]; sx8mba(
else if(i2>r) fJOU1%
data[cur]=temp[i1++]; '.atbl
else if(temp[i1] data[cur]=temp[i1++]; m*P~X*St
else 9R>A,x(
data[cur]=temp[i2++]; :<ujk
} #x#.@
} $a\q<fN}
*~4uF
} ekI1j%fO
`]WU=Ss
改进后的归并排序: (0D0G-r:
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package org.rut.util.algorithm.support; ?Pl>sCFm~
RNoS7[&
import org.rut.util.algorithm.SortUtil; ]S,I}NP
*v:+AE
/** UN|"D]>/
* @author treeroot ]ZO^@sH
* @since 2006-2-2 8<)[+@$0
* @version 1.0 k4pvp5}%
*/ H) q9.Jg
public class ImprovedMergeSort implements SortUtil.Sort { ZH_ J+
]lQhIf6)k
private static final int THRESHOLD = 10; '4HwS$mW3
U@D=.6\B
/* 5/:Zj,41{
* (non-Javadoc) E_WiQ?p
* Yl8tjq}iC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )^%,\l-!
*/ ]t0?,q.$7
public void sort(int[] data) { .d8) *
int[] temp=new int[data.length]; g IX"W;
mergeSort(data,temp,0,data.length-1); sdS<-! %u4
} E'[pNU*"x-
28X)s!W'
private void mergeSort(int[] data, int[] temp, int l, int r) { }}grJh>tGg
int i, j, k; ^ 9;s nr
int mid = (l + r) / 2; "793R^Tz
if (l == r) &xH>U*c
return; f=~@e#U
if ((mid - l) >= THRESHOLD) BT d$n!'$n
mergeSort(data, temp, l, mid); j(nPWEyJM
else +t.T+` EG
insertSort(data, l, mid - l + 1); 56?U4wj7{
if ((r - mid) > THRESHOLD) S)g5Tu)
mergeSort(data, temp, mid + 1, r); L=Dx$#|
else *I'O_D
insertSort(data, mid + 1, r - mid); .vQ2w
Yz-b~D/=}
for (i = l; i <= mid; i++) { MB^b)\X
temp = data; $Ae/NwIlc
} Kh<v2
for (j = 1; j <= r - mid; j++) { Duptles
temp[r - j + 1] = data[j + mid]; Bu!Gy8\
} vGm;en
int a = temp[l]; dP)8T
int b = temp[r]; pVbX#3
for (i = l, j = r, k = l; k <= r; k++) { h3@mN\=h'
if (a < b) { n=rPFpRLF
data[k] = temp[i++]; *%Gy-5hM
a = temp; fM S-
} else { )E6m}?H5
data[k] = temp[j--]; wQ.ild
b = temp[j]; ;HqK^[1\
} f_raICO{R
} 9=3V}]^M
} "]MF =-v
;=h^"et
/** HLk}E*.mC
* @param data NTAPx=!1*
* @param l _Seiwk&
* @param i ) 3YE$,
*/ P.;B V",
private void insertSort(int[] data, int start, int len) { C8&)-v|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @ULr)&9
} XHpoaHyx
} Fzu"&&>0$
} [gv2fqpP
} JvHJ*E
>b{%j8uM
堆排序： ;Kkn7&'F
|&RdOjw$u
package org.rut.util.algorithm.support; ,3fw"P$
mGL%<4R,
import org.rut.util.algorithm.SortUtil; 0JNG\ARC
d6hWmZVC
/** P\N`E?lJL
* @author treeroot @*%.V.
* @since 2006-2-2 h+Dg"j<[
* @version 1.0 II~D66 bF
*/ sF|<m)Kt{W
public class HeapSort implements SortUtil.Sort{ zhN'@Wj'_
]4z?sk@
/* (non-Javadoc) b;x^>(It
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bd)A6a\h
*/ d(To)ly.
public void sort(int[] data) { u1]5qtg"
MaxHeap h=new MaxHeap(); ^vG*8,^S=8
h.init(data); 8swj'SjX
for(int i=0;i h.remove(); |L`w4;
System.arraycopy(h.queue,1,data,0,data.length); /6 P()Upe
} ^8V]g1]fiG
_|6{(
private static class MaxHeap{ JN3Oe5yB2@
j/^0q90QO
void init(int[] data){ p(Qm\g<
this.queue=new int[data.length+1]; )}u.b-Nt.
for(int i=0;i queue[++size]=data; ND21;
fixUp(size); '{OZ[$E
} m! p'nP
} ?"sk"{
rvr Ok
private int size=0; dnNc,l&g
E}1[&
private int[] queue; u.!Pda
-} Z
public int get() { t5eux&C
return queue[1]; ~^VcTSY@<L
} s*]1d*B!
H%])>
public void remove() { O'idS`
SortUtil.swap(queue,1,size--); YtIJJH
fixDown(1); % ;6e@U}
} urog.Q
file://fixdown }"xC1<]
private void fixDown(int k) { *;o=hM)Tp
int j; p=7kFv
while ((j = k << 1) <= size) { *AxKV5[H
if (j < size %26amp;%26amp; queue[j] j++; Bxm^Arc>
if (queue[k]>queue[j]) file://不用交换 ,VHvQU
break; y4shW|>5_
SortUtil.swap(queue,j,k); ^PWZ1.T
k = j; ;o8cfD.z
} Xb;CY9&
} zo]7#
private void fixUp(int k) { /{qr~7k,oQ
while (k > 1) { {}lw%d?A
int j = k >> 1; YTYYb#"Q
if (queue[j]>queue[k]) 2@^8{
break; '-ACNgNn
SortUtil.swap(queue,j,k); UGR5ILf
k = j; `9$?g|rB
} ^M?uv{354
} 4Q3Q.(
A?6b)B/e?
} 5(DCq(\P*
R8HA X
} *(r85lEou)
p]pFZ";70
SortUtil： ]>`Q"g~0
>:wk.<Z-
package org.rut.util.algorithm; 9`c :sop
^. Pn)J
import org.rut.util.algorithm.support.BubbleSort; ]HCt%5
import org.rut.util.algorithm.support.HeapSort; k,q` ^E8k
import org.rut.util.algorithm.support.ImprovedMergeSort; O gycP4z[
import org.rut.util.algorithm.support.ImprovedQuickSort; ~8|$KD4I
import org.rut.util.algorithm.support.InsertSort; ][qZOIk@
import org.rut.util.algorithm.support.MergeSort; &|9?B!,`
import org.rut.util.algorithm.support.QuickSort; h!)(R<
import org.rut.util.algorithm.support.SelectionSort; %7V?7BE
import org.rut.util.algorithm.support.ShellSort; jP}N^
R\X=Vg
/** >GZF\ER
* @author treeroot ?mF-zA'4]
* @since 2006-2-2 mXa1SZnE
* @version 1.0 GU"MuW`u2
*/ =#>P!
public class SortUtil { 6|9];)
public final static int INSERT = 1; iOD9lR`s
public final static int BUBBLE = 2; )fCl<KG*
public final static int SELECTION = 3; Kk??}
public final static int SHELL = 4; JXvHsCd?
public final static int QUICK = 5; &=s{ +0
public final static int IMPROVED_QUICK = 6; r%xNfTa
public final static int MERGE = 7; dn`#N^Od
public final static int IMPROVED_MERGE = 8; (T`x-wTl
public final static int HEAP = 9; k"L_0HK
SZyPl9.b
public static void sort(int[] data) { b\;QR?16R
sort(data, IMPROVED_QUICK); d5u,x.R
} 12k)Ek9
private static String[] name={ -pLb%f0?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9K%E+_7b
}; P3N f<
n){\KIU/O
private static Sort[] impl=new Sort[]{ &,K;F'
new InsertSort(), H)(Jjk-O
new BubbleSort(), %Cm4a49FNi
new SelectionSort(), L-=^GNh
new ShellSort(), LTJ|EXYA
new QuickSort(), l?#([(WM
new ImprovedQuickSort(), 47t^{WrT
new MergeSort(), 3 #jPQ[+
new ImprovedMergeSort(), tb_}w@:kU
new HeapSort() 6%:'2;xM
}; %=NqxF>>
&Cdd
public static String toString(int algorithm){ 67f#Z&r2k
return name[algorithm-1]; HK ;C*;vC%
} >r{,$)H0
1_<'S34
public static void sort(int[] data, int algorithm) { zzPgLE55
impl[algorithm-1].sort(data); ..n-&(c32
} N-vr_4{g
#>!!#e!*
public static interface Sort { EV~_-YC
public void sort(int[] data); WlG/7$
} Zb}=?fcL;@
~omX(kPzK
public static void swap(int[] data, int i, int j) { ^yBx.GrQc
int temp = data; D4 e)v%
data = data[j]; i%-c/ lop
data[j] = temp; Q@l3XNH|c
} ^>]p4Q3 6
} bD49$N?>