[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; ()Tl\
} n8FmIoZ&`
int i1=l; <l#|I'hP
int i2=mid+1; FrKI=8
for(int cur=l;cur<=r;cur++){ G@+AB*Eu
if(i1==mid+1) S>N/K
data[cur]=temp[i2++]; 5a^b{=#Y
else if(i2>r) 24L =v
data[cur]=temp[i1++]; /q\{OsrX
else if(temp[i1] data[cur]=temp[i1++]; /t;Kn m
else 0%OV3`
data[cur]=temp[i2++]; n^+rxG6L
} lr-:o@q{
} kM o7mkV
>}|Vmy[/
} o?]g
:,*{,^2q:
改进后的归并排序: kE*OjywN
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package org.rut.util.algorithm.support; uNS ]n}
r[votdFo
import org.rut.util.algorithm.SortUtil; ??g`c=R!V
/'WIgP
/** A3cW8OClz
* @author treeroot DAHQ7#qfQC
* @since 2006-2-2 mO~A}/je
* @version 1.0 "<LVA2v;
*/ :f|X$> b
public class ImprovedMergeSort implements SortUtil.Sort { 1~_&XNb&
l;'#!hC)
private static final int THRESHOLD = 10; hq[RU&\
VfON{ 1g
/* [ta3sEPjs
* (non-Javadoc) ^V5g[XL2
* 5Z@~d'D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) InCo[ 8SI
*/ [tEHr
public void sort(int[] data) { @*}?4wU^k
int[] temp=new int[data.length]; FY(C<fDRo{
mergeSort(data,temp,0,data.length-1); [WxRwE
} wn-{Vkpm
irRe}
private void mergeSort(int[] data, int[] temp, int l, int r) { ZZJXd+Q}
int i, j, k; $k=5nJ
int mid = (l + r) / 2; YR$)yl
if (l == r) Tl2e?El;4
return; <Z6tRf;B
if ((mid - l) >= THRESHOLD) V`;$Ua;y
mergeSort(data, temp, l, mid); X|3l*FL
else oy?>e1Sy*
insertSort(data, l, mid - l + 1); (b}}'
if ((r - mid) > THRESHOLD) HvSYE[Zt|
mergeSort(data, temp, mid + 1, r); _o-lNt+
else :>t^B+
insertSort(data, mid + 1, r - mid); pPX~pPIj2
[Q+qu>&HB7
for (i = l; i <= mid; i++) { 5?()o}VjAO
temp = data; nR()ei^X
} \h&ui]V
for (j = 1; j <= r - mid; j++) { -<0PBl
temp[r - j + 1] = data[j + mid]; ]|y]?7
} J"TM[4^\Y
int a = temp[l]; E*F)jP,yo
int b = temp[r]; S ;; Z
for (i = l, j = r, k = l; k <= r; k++) { O^AF+c\n
if (a < b) { k;?Oi?]
data[k] = temp[i++]; @/m|T]'8
a = temp; ps*dO
} else { {ta0dS;1
data[k] = temp[j--]; u VZouw#
b = temp[j]; R1%2]?
} DrTo")T
} |=Mn~`9p
} ,z1fiq
y+PiH
/** 'xC83}!k
* @param data /W6r{Et
* @param l p FkqDU
* @param i 0H6^2T<
*/ Viu+#J;l
private void insertSort(int[] data, int start, int len) { +cw;a]o^>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~alC5|wCUQ
} zgdOugmmt_
} Z{|U!tn
} a^*@j:[
} ZL3aO,G2
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堆排序： j|u6TG
r="wd
package org.rut.util.algorithm.support; W|PKcZ ]Uc
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import org.rut.util.algorithm.SortUtil; ^}-(8~_en
f8Xe%"<
/** 8G>;X;W
* @author treeroot COx<X\
* @since 2006-2-2 *Q<%(JJ
* @version 1.0 r2EIhaGF;
*/ 0nF>E@j^[
public class HeapSort implements SortUtil.Sort{ 2[\I{<2/9
?w}E/(r
/* (non-Javadoc) +M+ht
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dnby&-+T
*/ %C]K`=vI-
public void sort(int[] data) { 0Wf,SYx`s
MaxHeap h=new MaxHeap(); rKDMIECrm
h.init(data); QOECpk-
for(int i=0;i h.remove(); {e4ILdXM
System.arraycopy(h.queue,1,data,0,data.length); ):. +u=
} qp-/S^%
V}#2pP
private static class MaxHeap{ *q8L$D
C(:tFuacpw
void init(int[] data){ Z=sCYLm
this.queue=new int[data.length+1]; -ISI!EU$
for(int i=0;i queue[++size]=data; $vS`w4Y
fixUp(size); MorR&K
} XD5z+/F<"0
} -f.<s!a
Nb[z+V{=
private int size=0; 3*G7H
%y~=+Sm%m
private int[] queue; =Tf uwhV
^ ~HV`s
public int get() { eKlh }v
return queue[1]; bJD2c\qoc
} 1"r6qYN!>
}>cQ}6n.
public void remove() { T`{W$4XS
SortUtil.swap(queue,1,size--); f1;Pzr
fixDown(1); {]~b^=qE$
} +I0?D
file://fixdown 3&!X8Lhv
private void fixDown(int k) { vcsi@!
int j; M0<gea\ =
while ((j = k << 1) <= size) { 2G8f4vsC[
if (j < size %26amp;%26amp; queue[j] j++; zE +)oQ,
if (queue[k]>queue[j]) file://不用交换 />(e.)f
break; _r8.I9|
SortUtil.swap(queue,j,k); "Y9 *rL
k = j; C6=7zYhR
} d#.9!m~.
} v;X'4/M
private void fixUp(int k) { -Cwx %
while (k > 1) { i{w<4E3
int j = k >> 1; fr8:L!9
if (queue[j]>queue[k]) 4"fiEt,t<x
break; g4<w6eB
SortUtil.swap(queue,j,k); R=~+-^O!
k = j; DQ^yqBVgQ
} b>AFhj:
} F.mS,W]
:e:jILQ[
} 4(MZ*6G]?
*Z=K9y,IC
} s.]7c CY
x|G#oG)_
SortUtil： OwrzD~
[>+(zlK"
package org.rut.util.algorithm; PA;RUe
't \:@-tQ
import org.rut.util.algorithm.support.BubbleSort; TOV531
import org.rut.util.algorithm.support.HeapSort; MNOT<(
import org.rut.util.algorithm.support.ImprovedMergeSort; %iY-}uhO
import org.rut.util.algorithm.support.ImprovedQuickSort; &GcWv+p
import org.rut.util.algorithm.support.InsertSort; ?V%x94B
import org.rut.util.algorithm.support.MergeSort; e!b?SmNN
import org.rut.util.algorithm.support.QuickSort; .?9+1.`
import org.rut.util.algorithm.support.SelectionSort; a?K=
import org.rut.util.algorithm.support.ShellSort; ,Khhu%$
6,)!\1k
/** g PogV(V
* @author treeroot 9*2A}dH
* @since 2006-2-2 ZurQr}
* @version 1.0 }OgzSnR
*/ ~aa`Y0Ws],
public class SortUtil { d9h"Q
public final static int INSERT = 1; S#dkJu]]#
public final static int BUBBLE = 2; g2.%x\d
public final static int SELECTION = 3; @$z/=gsy
public final static int SHELL = 4; S',i
public final static int QUICK = 5; IZYq
public final static int IMPROVED_QUICK = 6; DesvnV'{`
public final static int MERGE = 7; O79;tA<k
public final static int IMPROVED_MERGE = 8; 5fPYtVm
public final static int HEAP = 9; )vO;=%GQ
'$*d:1
public static void sort(int[] data) { Lc(D2=%
sort(data, IMPROVED_QUICK); fRC(Yyx
} 9B")/Hz_
private static String[] name={ ZYZQ?FN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GJW+'-f
}; G=a.Wff
q3Re F_
private static Sort[] impl=new Sort[]{ xcr=AhqM
new InsertSort(), )[Bwr bn
new BubbleSort(), N#'+p5|>
new SelectionSort(), ) \Mwv&k1
new ShellSort(), Vd^_4uqnV
new QuickSort(), DG}YQr.L
new ImprovedQuickSort(), fBS`b[x
new MergeSort(), 6z@OGExmd#
new ImprovedMergeSort(), &n+3^JNl
new HeapSort() P]gksts9f.
}; GCCmUR9d
H S/1z
public static String toString(int algorithm){ R[ p. )F7
return name[algorithm-1]; Z)Y--`*
} dk~h
iaO;i1K5U
public static void sort(int[] data, int algorithm) { rBLkowDP*
impl[algorithm-1].sort(data); N+)4]ir>
} gv$6\1
%\#s@8=2u
public static interface Sort { 6+"P$Ed#i
public void sort(int[] data); z5IHcZ
} 4K`N3
3)v6N_
public static void swap(int[] data, int i, int j) { X||Z>w}v
int temp = data; (yQ]n91Q,
data = data[j]; 7qSlqA<Hs
data[j] = temp; #+Z3!VS
} (x,w/1
} d&'z0]mOe