[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; os|8/[gT
} "qjkwf)\
int i1=l; at]=SA
int i2=mid+1; >{p&_u.r-
for(int cur=l;cur<=r;cur++){ mk8xNpk B
if(i1==mid+1) I?LJXo\O
data[cur]=temp[i2++]; sxIvL7jl
else if(i2>r) P?VGY
data[cur]=temp[i1++]; B*p`e1
else if(temp[i1] data[cur]=temp[i1++]; aa2&yc29hp
else W\:!v%C
data[cur]=temp[i2++]; @&t';"AE
} hJ\IE?+
} ]/hF!eO
VliX'.-
} Gf(hN|X.
Q;W[$yvW
改进后的归并排序: O|=5+X
oa$-o/DhB
package org.rut.util.algorithm.support; {m~.'DU
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import org.rut.util.algorithm.SortUtil; (+q#kKR
B:#5U85m
/** 2K4Jkyi
* @author treeroot 7Vd"k;:X
* @since 2006-2-2 Rd@34"O
* @version 1.0 VTQ V]>|
*/ UjxEbk5>^
public class ImprovedMergeSort implements SortUtil.Sort { . >[d:0
cih@:=Qy
private static final int THRESHOLD = 10; v7&oHOk!
["Mq
/* xDU>y
* (non-Javadoc) lx$]f)%~
* 'QW/TJ=7r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6x|"1 G{
*/ '8\7(0$c
public void sort(int[] data) { V/5.37FSb
int[] temp=new int[data.length]; 6t/nM
mergeSort(data,temp,0,data.length-1); P1KXvc}JGe
} m}&cXY
vaN}M)W/
private void mergeSort(int[] data, int[] temp, int l, int r) { cO/%;HEV
int i, j, k; e^2e[rp0
int mid = (l + r) / 2; ya7PF~:E-
if (l == r) =<Q_&_.60
return; 7Mq4$|qhD
if ((mid - l) >= THRESHOLD) q)vdDdRe_
mergeSort(data, temp, l, mid); zmd,uhNc:
else 4.il4Qqy}i
insertSort(data, l, mid - l + 1); X^;[X~g
if ((r - mid) > THRESHOLD) %;ZWYj`]n
mergeSort(data, temp, mid + 1, r); w/_n$hX
else VQ wr8jXye
insertSort(data, mid + 1, r - mid); "!43,!<
\ldjWc<S
for (i = l; i <= mid; i++) { nF$n[:
temp = data; z{XN1'/V
} &c!d}pU}
for (j = 1; j <= r - mid; j++) { 8axz`2`
temp[r - j + 1] = data[j + mid]; !-%fCg(B
} I3sH8/*
int a = temp[l]; gwVfiXR4
int b = temp[r]; Tk~RT<\Ab+
for (i = l, j = r, k = l; k <= r; k++) { Tj5G /H>
if (a < b) { JHQc)@E}
data[k] = temp[i++]; =P'33) \ )
a = temp; Sc!]M 5
} else { ]gHxvT\E
data[k] = temp[j--]; W=b<"z]RE
b = temp[j]; \i1>/`F
} lS1-e0,h1
} $7M/rF;N5X
} ~DY5`jV
d'j8P
/** ,K4*0!TXP
* @param data %f??O|O3
* @param l h M{&if
* @param i 9{&APxm
*/ ttQX3rmF01
private void insertSort(int[] data, int start, int len) { vn oI.;H,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dLA'cQId
} Qa*?iD
} [f`^+,U
} @ qFE6!
} 'zYKG5A
Ve/"9?Y_
堆排序： w\(LG_n|
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package org.rut.util.algorithm.support; C\.mv|aW~
n =SY66
import org.rut.util.algorithm.SortUtil; -^A=U7
_`RzPIS^
/** Xxl>,QUA
* @author treeroot )HZUCi/F]
* @since 2006-2-2 \=n0@1Q=>
* @version 1.0 /JP]5M)
*/ f1eY2UtWQ
public class HeapSort implements SortUtil.Sort{ W40GW
{8L)Fw
/* (non-Javadoc) 31BN ?q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y# <38+Gd
*/ $#Mew:J
public void sort(int[] data) { "v.]s;g
MaxHeap h=new MaxHeap(); P<+y%g(({
h.init(data); m3|KIUP
for(int i=0;i h.remove(); %y@iA91K
System.arraycopy(h.queue,1,data,0,data.length); @\~qXz{6J
} 44s K2
6yIl)5/=
private static class MaxHeap{ [,GXA)j
p) x.Y
void init(int[] data){ b0\'JZ
this.queue=new int[data.length+1]; sy^k:y?
for(int i=0;i queue[++size]=data; &p?Oo^
fixUp(size); iU)-YFO
} D+ki2UVt&
} 84PD`A
bYzBe\^3q3
private int size=0; c[=%v]j:u
WA);Z=
private int[] queue; hl4@Y#n
OL+!,Y
public int get() { Sr7+DCr
return queue[1]; !*46@sb:
} DNgQ.lV
wp/u*g
public void remove() { 9JF*xXd>Q
SortUtil.swap(queue,1,size--); id^U%4J
fixDown(1); 2>{_O?UN
} \L#BAB6z
file://fixdown Q@3.0Hf|{
private void fixDown(int k) { wu*WA;FnA
int j; Kuh! b`9
while ((j = k << 1) <= size) { V/j]UK0$
if (j < size %26amp;%26amp; queue[j] j++; a S- rng
if (queue[k]>queue[j]) file://不用交换 dEXHd@"H
break; Pn{yk`6E
SortUtil.swap(queue,j,k); T;-Zl[H
k = j; "Y&+J@]
} vPG!S{4
} b0a'Y"oef4
private void fixUp(int k) { -t9oL3J
while (k > 1) { '-jKv=D+
int j = k >> 1; %iPu51+=
if (queue[j]>queue[k]) B3I\=
break; 0F'75
SortUtil.swap(queue,j,k); CK e
k = j; {GF>HHQb
} ^qpa[6D6x
} mB(*)PwZ
0XlX7Sk+
} i'!M<>7
Ow\9vf6H
} >l$vu-k)~4
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SortUtil： R|Ft@]
=#XsY,r
package org.rut.util.algorithm; A!v-[AI[
Q, E!Ew3
import org.rut.util.algorithm.support.BubbleSort; {nQ}t }B
import org.rut.util.algorithm.support.HeapSort; 1A23G$D
import org.rut.util.algorithm.support.ImprovedMergeSort; KmV>tn BQ
import org.rut.util.algorithm.support.ImprovedQuickSort; ^_<>o[qE
import org.rut.util.algorithm.support.InsertSort; IidZ-Il
import org.rut.util.algorithm.support.MergeSort; u)P$xkf
import org.rut.util.algorithm.support.QuickSort; 3&*0n^g
import org.rut.util.algorithm.support.SelectionSort; rL URP2~
import org.rut.util.algorithm.support.ShellSort; ^F*)Jq
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/** sF;1)7]Pq
* @author treeroot .Jdw:
* @since 2006-2-2 ?Di,'
* @version 1.0 ^a`zvrE v
*/ xsRMF&8L
public class SortUtil { /3%]Ggwe
public final static int INSERT = 1; i:#R U^R
public final static int BUBBLE = 2; ilK8V4k<T)
public final static int SELECTION = 3; :Puv8[1i
public final static int SHELL = 4; "sFdrXJ
public final static int QUICK = 5; Fc}wuW
public final static int IMPROVED_QUICK = 6; 2W pe( $
public final static int MERGE = 7; 9$NFZ3Mz
public final static int IMPROVED_MERGE = 8; 8O{]ML
public final static int HEAP = 9; Kw'Dzz%kN
"!)8bTW
public static void sort(int[] data) { +2oZB]GPL
sort(data, IMPROVED_QUICK); \Y9=dE}
} HkvCQH
private static String[] name={ c7\bA7.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^OG^% x"
}; @n(=#Q3
>1ZMQgCG
private static Sort[] impl=new Sort[]{ cXJgdBwo
new InsertSort(), _0F6mg n
new BubbleSort(), u\qyh9s
new SelectionSort(), BHj]w*Ov
new ShellSort(), F__>`Dol
new QuickSort(), mS~3QV
new ImprovedQuickSort(), `M>{43dj
new MergeSort(), H@IX$+;z
new ImprovedMergeSort(), n2#uH
new HeapSort() ~73"AWlp
}; #`"'
*ep!gT*4
public static String toString(int algorithm){ 4BEVG&Ks
return name[algorithm-1]; >K\ 79<x|
} cDs#5,
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public static void sort(int[] data, int algorithm) { 8gC(N3/E"
impl[algorithm-1].sort(data); MPzqw)_-v
} ZuS+p0H"
2L<TqC{,-
public static interface Sort { ]VJcV.7`
public void sort(int[] data); P>N\q
} ;JL@V}L,
aDZLabRu
public static void swap(int[] data, int i, int j) { A#1y>k
int temp = data; iI&SI#; _
data = data[j]; =As'vt 0
data[j] = temp; 5!nZvv
} @oRYQ|.R
} ,A6*EJ\w