[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; Lr]Hvd
} ))-M+CA
int i1=l; Fd=`9N9
int i2=mid+1; Hm[!R:HW,S
for(int cur=l;cur<=r;cur++){ ty8!"-V1
if(i1==mid+1) pNsLoNZ3w
data[cur]=temp[i2++]; _ q1|\E%`h
else if(i2>r) LR.+CxQ
data[cur]=temp[i1++]; 3Q"+ #Ob
else if(temp[i1] data[cur]=temp[i1++]; ml/O
else T`G"2|ISS
data[cur]=temp[i2++]; y`dzo`f
} 1Ac1CsK*
} P.P>@@+d
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} +Ea XS
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改进后的归并排序: CT`X~y10
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package org.rut.util.algorithm.support; h0pr"]sO;$
md s\~l73
import org.rut.util.algorithm.SortUtil; (HxF\#r?
qa?y lR"kA
/** J8'zvH&I
* @author treeroot (`xnA~BN
* @since 2006-2-2 ~(S4/d5
* @version 1.0 jgIzB1H
*/ a"4 6_>
public class ImprovedMergeSort implements SortUtil.Sort { TR20{8"
)T_#X!
private static final int THRESHOLD = 10; &9{BuBO[
*5)!y d
/* CxV%/ChJ#
* (non-Javadoc) &o.SmkJI
* }5Uf`pM8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b5R*]
*/ aQFHB!
public void sort(int[] data) { VV0$L=mo
int[] temp=new int[data.length]; l"8YIsir
mergeSort(data,temp,0,data.length-1); P!EX;+7+x
} $Plk4 o*g
1doqznO
private void mergeSort(int[] data, int[] temp, int l, int r) { PMcyQ2R->
int i, j, k; <i-RF-*S
int mid = (l + r) / 2; f6)H!SI
if (l == r) 8),Y|4
return; {VG6m Hw
if ((mid - l) >= THRESHOLD) @dNbL}qQ
mergeSort(data, temp, l, mid); QR4o j
else ,PYe7c
insertSort(data, l, mid - l + 1); 2_Z60]
if ((r - mid) > THRESHOLD) RU=%yk-gM
mergeSort(data, temp, mid + 1, r); O/Vue
else "/5b3^a
insertSort(data, mid + 1, r - mid); sTDBK!9I
c/RG1w
for (i = l; i <= mid; i++) { LJD"N#c
temp = data; Ai;Pht9qi
} _1ins;c52
for (j = 1; j <= r - mid; j++) { Qsa2iw{
temp[r - j + 1] = data[j + mid]; \z 'noc
} yr?\YKV)I
int a = temp[l]; 566EMy|
int b = temp[r]; -/X-.#}-
for (i = l, j = r, k = l; k <= r; k++) { 2ip~qZNw><
if (a < b) { *O~D lf
data[k] = temp[i++]; G`jhzG
a = temp; d<o
} else { ^_uzr}LE`
data[k] = temp[j--]; =RA6p
b = temp[j]; aF:LL>H
} XJ"9D#"a>
} V]2Q92
} -84Z8?_
V.J%4&^X
/** ZfU_4Pl->
* @param data @u^Ib33
* @param l 43Q&<r$[T
* @param i <9"i_d%
*/ CJ_B.
private void insertSort(int[] data, int start, int len) { Z5Cv$bUc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W3b\LnUa
} ~X/T6(n$
} [>E0(S]
} 4.8,&{w<m
} 0^=S:~G
#qWEyb2UZ
堆排序： 0:*$i(2
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package org.rut.util.algorithm.support; dZ*o H#B
'py k
import org.rut.util.algorithm.SortUtil; #!2gxm;g
(w*$~p
/** ?~!h N,h
* @author treeroot Rd2[xk
* @since 2006-2-2 (<12&=WxE
* @version 1.0 wZ^/-
*/ [kCn6\_<V
public class HeapSort implements SortUtil.Sort{ p: o*=
.#X0P=
/* (non-Javadoc) <YC{q>EMc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [7bY(
*/ W6pS.}
public void sort(int[] data) { jV(ISD
MaxHeap h=new MaxHeap(); B~^\jRd"
h.init(data); ^JTfRZ:a
for(int i=0;i h.remove(); ?@~FT1"6G
System.arraycopy(h.queue,1,data,0,data.length); f*Kipgp
} {1o=/&
}V 1sY^C
private static class MaxHeap{ 0t) IWD
fqcyCu7Ep
void init(int[] data){ hm&~6rB
this.queue=new int[data.length+1]; ZrTq)BZ
for(int i=0;i queue[++size]=data; _Qv4;a
fixUp(size); )YZ41K5N
} _u>+H#
} 8)i\d`
,"D1!0
private int size=0; G 5)?!
_?{2{^v
private int[] queue; &rn,[w_F[
_2|,j\f;L
public int get() { #8PjYB
return queue[1]; W?@ ;(k
} /fX]Yu
$1axZ~8sS
public void remove() { O @w=
SortUtil.swap(queue,1,size--); H:|yu
fixDown(1); <a'j8pw9i
} Z8m/8M
file://fixdown f~]5A%=cZ
private void fixDown(int k) { WYq, i}S
int j; \UXQy{Ex
while ((j = k << 1) <= size) { PgVM>_nHk
if (j < size %26amp;%26amp; queue[j] j++; ar6Z?v$
if (queue[k]>queue[j]) file://不用交换 3LEN~N}
break; DU;]Q:r{
SortUtil.swap(queue,j,k); A)qOJ(OEz
k = j; u", [ulP
} KmMt:^9
} 8J)x>6
private void fixUp(int k) { O".#B
while (k > 1) { ZI8p(e
int j = k >> 1; C}M0KDF
if (queue[j]>queue[k]) hVd63_OO
break; QPBf++|
SortUtil.swap(queue,j,k); +'[iyHBJ
k = j; 3mx7[Q
} ;N)qNiJY
} cM55 vVd
er97&5
} b7\nCRY
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} _3)~{dQ+
j3$KYf`T}
SortUtil： f1Rm9``
RNm/&F1C$
package org.rut.util.algorithm; _Wgg=A"G
jML}{>Gy8S
import org.rut.util.algorithm.support.BubbleSort; -`rz[";n
import org.rut.util.algorithm.support.HeapSort; ](%-5G1<
import org.rut.util.algorithm.support.ImprovedMergeSort; r1,RloyZS
import org.rut.util.algorithm.support.ImprovedQuickSort; ,#s}nJ4
import org.rut.util.algorithm.support.InsertSort; 9D&ocV3QV
import org.rut.util.algorithm.support.MergeSort; grv 3aa@
import org.rut.util.algorithm.support.QuickSort; xNT[((
import org.rut.util.algorithm.support.SelectionSort; $[IuEdc/
import org.rut.util.algorithm.support.ShellSort; _v_ak4m>
+|^rz#X
/** P}cGWfj
* @author treeroot d~qDQ6!
* @since 2006-2-2 m,-:(82
* @version 1.0 vh((HS-)
*/ K !`tEW[
public class SortUtil { :[,n`0lH
public final static int INSERT = 1; 0'a.Ypf
public final static int BUBBLE = 2; {AJspLcG
public final static int SELECTION = 3; L>cTI2NB.
public final static int SHELL = 4; x H\5T!
public final static int QUICK = 5; !)ee{CwNc
public final static int IMPROVED_QUICK = 6; d6wsT\S
public final static int MERGE = 7; [03Aej
public final static int IMPROVED_MERGE = 8; 1XwbsKQ}
public final static int HEAP = 9; ,b2Cl[
FLi)EgZXt
public static void sort(int[] data) { =EFF2M`F
sort(data, IMPROVED_QUICK); ao Y"uT+
} SeKU?\
private static String[] name={ !5pnl0DK*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O"^KX5
}; gR%fv
_8kZ>w(L
private static Sort[] impl=new Sort[]{ z0a=A:+/
new InsertSort(), F $B_;G
new BubbleSort(), cu.f]'
new SelectionSort(), 9FK%"s`
new ShellSort(), xoPpu
new QuickSort(), m\[r6t]V
new ImprovedQuickSort(), |6$6Za]:
new MergeSort(), mI@]{K}Q%
new ImprovedMergeSort(), |R DPx6!V
new HeapSort() Q!MS_ #O
}; YS%HZFY, "
_r&`[@m
public static String toString(int algorithm){ v 6Tz7
return name[algorithm-1]; !\2Xr{f
} tyNT1F{
~`(#sjr6KR
public static void sort(int[] data, int algorithm) { Y@F@k(lOo
impl[algorithm-1].sort(data); mZ'`XAS~;
} +wr2TT~
;i>|5tEy
public static interface Sort { cd#@"&r
public void sort(int[] data); NO8)XJ3s
} _5y3<H<?
U)o(}:5xF
public static void swap(int[] data, int i, int j) { ?x=;?7
int temp = data; LDx1@a|83
data = data[j]; +.:- :
data[j] = temp; N!{('po
} 8:TN,p
} D `c YQ-