[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; WUKYwA/t
} $cnIsyKWY
int i1=l; ?,]25q
int i2=mid+1; (Ori].{C.J
for(int cur=l;cur<=r;cur++){ /.P*%'g
if(i1==mid+1) q45Hmz
data[cur]=temp[i2++]; M*|x,K=U
else if(i2>r) G >bQlZG
data[cur]=temp[i1++]; ;8H m#p7,
else if(temp[i1] data[cur]=temp[i1++]; P/4]x@{ih
else OQA}+XO
data[cur]=temp[i2++]; Dr&2qX!
} |.X?IJ`
} Hr:WE+'
_uID3N%
} Y$shn]~
fQM:NI?9?
改进后的归并排序: tRFj<yuaq
6|L<? X
package org.rut.util.algorithm.support; K08xiMjl
o/ ozX4C
import org.rut.util.algorithm.SortUtil; xM'bb5
eNR>W>;'
/** %N04k8z
* @author treeroot ycTX\.KV
* @since 2006-2-2 ^fa+3`>
* @version 1.0 e<#t]V
*/ unKi)v1
public class ImprovedMergeSort implements SortUtil.Sort { W$=Ad *
;N#d'E\
private static final int THRESHOLD = 10; B/6wp^#VX
k?ZtRhPu3X
/* ,3=|a|p
* (non-Javadoc) a"@k11
* Wxx?iW ,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V4PI~"4q#1
*/ 9ldv*9v
public void sort(int[] data) { ux:czZqy
int[] temp=new int[data.length]; L)p*D(
mergeSort(data,temp,0,data.length-1); WBvh<wTw;
} >)\x\e
ZCVwQ#Xe+
private void mergeSort(int[] data, int[] temp, int l, int r) { d e)7_pCF|
int i, j, k; ji9 (!G
int mid = (l + r) / 2; }coSMTMv6
if (l == r) O/ Yz6VQ
return; %&w 8E[
if ((mid - l) >= THRESHOLD) kV9S+ME
mergeSort(data, temp, l, mid); B)>r~v]
else (xxNQ] l-(
insertSort(data, l, mid - l + 1); qz[qjGdHg
if ((r - mid) > THRESHOLD) J)tk<&X
mergeSort(data, temp, mid + 1, r); q% *-4GP
else .LMOmc=(
insertSort(data, mid + 1, r - mid); IsP-[0it
"x~VXU%xU
for (i = l; i <= mid; i++) { =A[:]),v
temp = data; OI/m_xx@j
} PW7{,1te,
for (j = 1; j <= r - mid; j++) { D_kz'0^|
temp[r - j + 1] = data[j + mid]; (OS -v~{r@
} cC@.&
int a = temp[l]; ]$Ud`<Xnx
int b = temp[r]; _7e ^ t N
for (i = l, j = r, k = l; k <= r; k++) { k_d)
if (a < b) { [&H$Su}$0
data[k] = temp[i++]; ' b?' u
a = temp; P}kBqMM
} else { $U. >]i
data[k] = temp[j--]; n+C]&6-b
b = temp[j]; {XT3M{`rWL
} :ET05MFs\#
} b51{sL
} k 8C[fRev
IFrq\H0
/** O~E6"vQ
* @param data WE_jT1^/
* @param l c-|~ABtEpX
* @param i sFd"VRAV~E
*/ AqPE.mf
private void insertSort(int[] data, int start, int len) { qb^jcy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -Wp69DP6q
} r-27AJu
} 4NY00d/R
} b)7uz>I
} (AHZmi V
ZG=B'4W
堆排序： 9ghZLQ
U>0' K3_
package org.rut.util.algorithm.support; wzLR]<6G
c,ccavv{I
import org.rut.util.algorithm.SortUtil; $D`~X`
G#V}9l8Q
/** Kd2?9gaw
* @author treeroot *?;<buJb?
* @since 2006-2-2 Y)?dq(
* @version 1.0 $U,`M"
*/ %Pr PCT
public class HeapSort implements SortUtil.Sort{ bjgf8427I
Hwr# NKz-
/* (non-Javadoc) JsNqijVC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aE[>^~Lv}
*/ +&LzLF.bK
public void sort(int[] data) { 9fk@C/$
MaxHeap h=new MaxHeap(); cR;zNS
h.init(data); z^+`S:
for(int i=0;i h.remove(); $"P9I-\m
System.arraycopy(h.queue,1,data,0,data.length); )Fc`rY
} it=4cHT
4@,d{qp~
private static class MaxHeap{ ;DMv?-H
wzX 1!?
void init(int[] data){ %O5 k+~9
this.queue=new int[data.length+1]; LnQm2uF
for(int i=0;i queue[++size]=data; ~vD7BO`
fixUp(size); Wa#!O$u
} ]LFY2w<
} Q'f!392|
[Z2:3*5r.
private int size=0; ^;J@]&[ ~
m'Jk!eo
private int[] queue; z^s40707x
&Gp~)%
public int get() { \Mk;Y
return queue[1]; 7U#`^Q}
} wGd4:W
<8UqV.&
public void remove() { cswX?MN
SortUtil.swap(queue,1,size--); liEb(<$a
fixDown(1); [al,UO
} R|PFGhi6"A
file://fixdown Am~NBQ7
private void fixDown(int k) { #q{i<E 07
int j; S~WsGLF s
while ((j = k << 1) <= size) { EjsAV F [@
if (j < size %26amp;%26amp; queue[j] j++; :Jp$_T&E
if (queue[k]>queue[j]) file://不用交换 pWo`iM& F
break; &1hJ?uM01
SortUtil.swap(queue,j,k); ()=u#y
k = j; %N\pfZ2\
} Xg*IOhF6x
} xNG'UbU
private void fixUp(int k) { ;IhkGPpWP
while (k > 1) { 3zJbb3e
int j = k >> 1; 6&(gp(F
if (queue[j]>queue[k]) b*4[)Yg4
break; Hu$]V*rAG
SortUtil.swap(queue,j,k); 8fpaY{]
k = j; ^H'zS3S
} uVoM2n?D%^
} hw`+,_ g
@";z?xj
} o[AQS`
Lu&2^USTO
} ,RFcR[ak
~__]E53F
SortUtil： HjTK/x'_'L
G!~[+B
package org.rut.util.algorithm; Va"_.8n|+
XZhX%OT!
import org.rut.util.algorithm.support.BubbleSort; 9NwA5TP9_
import org.rut.util.algorithm.support.HeapSort; 2#Fc4RR;
import org.rut.util.algorithm.support.ImprovedMergeSort; htbN7B(
import org.rut.util.algorithm.support.ImprovedQuickSort; jyF0asb
import org.rut.util.algorithm.support.InsertSort; ;u LD_1%
import org.rut.util.algorithm.support.MergeSort; ['pk/h
import org.rut.util.algorithm.support.QuickSort; (80#{4kl
import org.rut.util.algorithm.support.SelectionSort; h'wOslyFa
import org.rut.util.algorithm.support.ShellSort; )f4D2c&VE
}'{39vc .
/** zECdj'/
* @author treeroot 8;7Y}c
* @since 2006-2-2 ?4=8z8((!
* @version 1.0 b?h9G3J_a
*/ #3maT*JY
public class SortUtil { _xign 3
public final static int INSERT = 1; D/hQ{T
public final static int BUBBLE = 2; R}4o{l6
public final static int SELECTION = 3; eTZ`q_LfI1
public final static int SHELL = 4; *|'}v[{v^9
public final static int QUICK = 5; MZ^Ch
public final static int IMPROVED_QUICK = 6; `Kp}s<
public final static int MERGE = 7; UCF[oO>v
public final static int IMPROVED_MERGE = 8; }85#[~m'
public final static int HEAP = 9; yHw!#gWM
M=Is9)y
public static void sort(int[] data) { ^V,@=QL3U
sort(data, IMPROVED_QUICK); *lq7t2
} :+A;TV
private static String[] name={ dh,7iQ s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m2MPWy5s
}; bgXc_>T6_y
faJ8zX
private static Sort[] impl=new Sort[]{ 9;:7e*x]lc
new InsertSort(), F~P/*FFK
new BubbleSort(), | &\^n2`>
new SelectionSort(), Es,0'\m&
new ShellSort(), qZc)Sa.S
new QuickSort(), h!;MBn`8
new ImprovedQuickSort(), .?7So3
new MergeSort(), "p2u+ 8?
new ImprovedMergeSort(), L/%xbm~
new HeapSort() '4Y*-!9
}; ~M(pCSJ[
_"`/^L`Q?
public static String toString(int algorithm){ (N9`WuI
return name[algorithm-1]; j[BgP\&,
} l9,w>]s
_4De!q0(
public static void sort(int[] data, int algorithm) { Kjvs@~6t
impl[algorithm-1].sort(data); QTJrJD
} 13]y)(
|Yg}WHm
public static interface Sort { @V*au:
public void sort(int[] data); ug>]U ~0
} cbY3mSfn*
R7y-#?
public static void swap(int[] data, int i, int j) { ~9]Vy (L
int temp = data; +2f> M4q
data = data[j]; DDZTqsws
data[j] = temp; LjX&',
} YlxUx
} "1E?3PFJ