[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; uRQm.8b
} rO/mK$
int i1=l; tgDmHxB]0
int i2=mid+1; /b20!3
for(int cur=l;cur<=r;cur++){ 'N],d&fu^^
if(i1==mid+1) _`L,}=um'
data[cur]=temp[i2++]; A8hj"V47
else if(i2>r) UHz*Tfjb
data[cur]=temp[i1++]; LQ?J r>4
else if(temp[i1] data[cur]=temp[i1++]; l0g#&V--
else ( =->rP
data[cur]=temp[i2++]; Gu<3*@Ng
} BSG_),AH
} J1Mm,LTO
(^Xp\dyZL
} tn;e PcU
'Ol}nmJ'n
改进后的归并排序: Tn/T:7C
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package org.rut.util.algorithm.support; yyrCO"eh
O%A:2Y79
import org.rut.util.algorithm.SortUtil; 52tIe|KwL
GdR>S('
/** }+QgRGQ
* @author treeroot LDW":k|
* @since 2006-2-2 {Zjnf6d]
* @version 1.0 1#Dpj.cO#
*/ bP6QF1L
public class ImprovedMergeSort implements SortUtil.Sort { 9IMtqL&
`Ten2(D
private static final int THRESHOLD = 10; Qwk
@h X
/* Q0!gTV
* (non-Javadoc) vAq`*]W+
* WhSQ>h!@s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -Duy:C6W
*/ F^IYx~:
public void sort(int[] data) { RqXcL,,9
int[] temp=new int[data.length]; I_'S|L
mergeSort(data,temp,0,data.length-1); sZPPS&KoP3
} ?BQZ\SXU
[E2afC>zrl
private void mergeSort(int[] data, int[] temp, int l, int r) { HW"|Hm$Y(
int i, j, k; ]/HSlT=
int mid = (l + r) / 2; f3|ttUX
if (l == r) PLKp<kg
return; y;yXOE_
if ((mid - l) >= THRESHOLD) ={W;8BUV%^
mergeSort(data, temp, l, mid); ^u:7U4
else v6HBO#F'V{
insertSort(data, l, mid - l + 1); F5wCl2I
if ((r - mid) > THRESHOLD) J8J~$DU\Gv
mergeSort(data, temp, mid + 1, r); R(kr@hM
else o <0f
insertSort(data, mid + 1, r - mid); ]=2Ba<)m
~{0:`)2FQ
for (i = l; i <= mid; i++) { CK 3]]{
temp = data; xSs);XO,
} uo_Y"QiKEH
for (j = 1; j <= r - mid; j++) { rC14X}X6
temp[r - j + 1] = data[j + mid]; \s<{V7tq
} m(s(2wq"f
int a = temp[l]; Q$Ga.fI
int b = temp[r]; yaMNt}y-q
for (i = l, j = r, k = l; k <= r; k++) { '~VKH}b
if (a < b) { A9Q!V01_
data[k] = temp[i++]; Y _m4:9p
a = temp; :`2<SF^0O
} else { <h4"^9hL
data[k] = temp[j--]; :@rE&
b = temp[j]; \-0@9E<D
} w>p0ldi
} h +.8Rl
} B&Q\J>l9S
"yCCei,hA?
/** n`2d
* @param data dQYb)4ir
* @param l $HF. 02{|
* @param i 53J!iNnXT6
*/ K}tl,MMU
private void insertSort(int[] data, int start, int len) { (wEaa'XL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }=z_3JfO
} [mn@/qf
} "XT7;!
} <gF=$u|}3[
} :6S!1roi
'$YB -
堆排序： 9 [v=`
QG*=N {%5
package org.rut.util.algorithm.support; vH%AXzIA
z8_m<uewz
import org.rut.util.algorithm.SortUtil; QO0}-wZR
Ehi)n)HhG"
/** (9% ki$=}+
* @author treeroot GR@!mf
* @since 2006-2-2 rZ2X$FO@
* @version 1.0 AD#]PSB
*/ ."&,_F
public class HeapSort implements SortUtil.Sort{ X1&Ug^
3sIW4Cs7)U
/* (non-Javadoc) reR><p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t~ruP',~\
*/ M.$Li#So,
public void sort(int[] data) { eQu%TZ(x-$
MaxHeap h=new MaxHeap(); wwrP7T+d
h.init(data); ~qt)r_jW
for(int i=0;i h.remove(); I=o[\?u*_
System.arraycopy(h.queue,1,data,0,data.length); m^0r9y,
} 74Xk^8
=}>wxO
private static class MaxHeap{ ^!^6 |[
QEKSbxL\W
void init(int[] data){ pd{W(M78g
this.queue=new int[data.length+1]; RO[Ko-m|/N
for(int i=0;i queue[++size]=data; TPo%zZo
fixUp(size); A]ZCQ49
} EBlfwFd
} R,R[.2Vi
5OeTOI()&5
private int size=0; bwo-9B
_OV\W'RrA
private int[] queue; Ri4t/H
9<u^.w
public int get() { U"$Q$ OFs
return queue[1]; y6NOHPp@
} #=F"PhiX`
:MeshzWK
public void remove() { (Cjnf a 2
SortUtil.swap(queue,1,size--); ALvj)I`Al
fixDown(1); W%LTcm
} D`p&`]k3v
file://fixdown Z0&^U#]
private void fixDown(int k) { GslUN% UJr
int j; j1_ E^
while ((j = k << 1) <= size) { PN9^ sLx=
if (j < size %26amp;%26amp; queue[j] j++; n,sf$9"
if (queue[k]>queue[j]) file://不用交换 (t&]u7Atr
break; S<}2y9F
SortUtil.swap(queue,j,k); =B4,H=7Spf
k = j; aEUC
} qu]ch&"?U
} lyGQ6zlSn
private void fixUp(int k) { fxfzi{}uj
while (k > 1) { H`u8}{7
int j = k >> 1; H.-jBFt}
if (queue[j]>queue[k]) T}} 0hs;
break; i`[5%6\"&
SortUtil.swap(queue,j,k); .5Y%I;~v
k = j; 7sP;+G
} tP; &$y.8
} V3;4,^=6Dd
&qw7BuF
} ?^Sk17G
.d< +-w2Mu
} bqugo
rM<lPMr1*
SortUtil： wMy$T<:
JA W}]:jC
package org.rut.util.algorithm; &gJKJ=7
7#n<d879e%
import org.rut.util.algorithm.support.BubbleSort; |8I #`
import org.rut.util.algorithm.support.HeapSort; (Wkli:Lq
import org.rut.util.algorithm.support.ImprovedMergeSort; 3wXmX
import org.rut.util.algorithm.support.ImprovedQuickSort; ?pgdj|"a
import org.rut.util.algorithm.support.InsertSort; gfQ&U@N
import org.rut.util.algorithm.support.MergeSort; `@GqD
import org.rut.util.algorithm.support.QuickSort; 5 e:Urv77
import org.rut.util.algorithm.support.SelectionSort; mhnjYK9
import org.rut.util.algorithm.support.ShellSort; ~~:w^(s9
M=[/v/M=
/** u2HkAPhD
* @author treeroot QX(x6y>Q
* @since 2006-2-2 Z=%+U _,
* @version 1.0 $q*kD#;mh
*/ Oq"(oNG@
public class SortUtil { M0!;{1
public final static int INSERT = 1; ]2G5ng' @
public final static int BUBBLE = 2; UnNvlkjq9
public final static int SELECTION = 3; @C)O[&Sk
public final static int SHELL = 4; <4jQbY;
public final static int QUICK = 5; ~ZU;0#
public final static int IMPROVED_QUICK = 6; #1R_* Uh
public final static int MERGE = 7; fs4pAB#F
public final static int IMPROVED_MERGE = 8; .4={K)kz|F
public final static int HEAP = 9; zM6yUEg
Z:f0>
public static void sort(int[] data) { 8D]:>[|E
sort(data, IMPROVED_QUICK); L/(e/Jalg
} Myss$gt}
private static String[] name={ 1A^iUC5)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,oe e'
}; || ?B1
2rHw5Wn]~
private static Sort[] impl=new Sort[]{ }]vj"!?a
new InsertSort(), m}.ru)^p
new BubbleSort(), /R#-mY
new SelectionSort(), )6)|PzMQ'
new ShellSort(), oTtmn, T
new QuickSort(), S-Va_t$
new ImprovedQuickSort(), YVVX7hB
new MergeSort(), o^~6RZ
new ImprovedMergeSort(), :b>Z|7g?
new HeapSort() )DMu`cD
}; 322W"qduTZ
*pP"u::S
public static String toString(int algorithm){ &n<jpMB
return name[algorithm-1]; [e)81yZG>
} Ga f/0/|
3iYz<M
public static void sort(int[] data, int algorithm) { GG"0n{>0
impl[algorithm-1].sort(data); L:YsAv
} ,2JqX>On>Y
N-^\X3X
public static interface Sort { ;KQ'/nII
public void sort(int[] data); 3FUZTX]Q1
} *" <tFQ
&o"Hb=k<
public static void swap(int[] data, int i, int j) { 'G(N,vu[@
int temp = data; ?f']*pD8
data = data[j]; m?<8 ':
data[j] = temp; CW\o>yh
} 'lC"wP&$
} NJqALm!(