[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; _$Z46wHmB
} \a|gzC1G
int i1=l; /dWuHS
int i2=mid+1; D:.^]o[
for(int cur=l;cur<=r;cur++){ R`s /^0
if(i1==mid+1) QouTMS-b
data[cur]=temp[i2++]; !pDS*{)E
else if(i2>r) N#ex2c
data[cur]=temp[i1++]; >@EQarD
else if(temp[i1] data[cur]=temp[i1++]; gB kb0
else hi.{
data[cur]=temp[i2++]; uP+ j_is
} cl)MI,/>
} hpAIIgn
,ew<T{PL
} h]MSjC.X
! '2'db
改进后的归并排序: )Hev-C"
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package org.rut.util.algorithm.support; R` X$@iM
4&`66\p;
import org.rut.util.algorithm.SortUtil; {P = {)
$xloB
/** tQ|b?3
* @author treeroot BE3~f6 `
* @since 2006-2-2 n.7 $*9)#
* @version 1.0 [5m;L5
*/ KJ(zLwQ:
public class ImprovedMergeSort implements SortUtil.Sort { =U,;/f
Z;%qpsq
private static final int THRESHOLD = 10; yM#W,@
ym${4
/* qqkZbsN
* (non-Javadoc) lgnF\)
* ;M'R/JlUN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *[vf47)r!
*/ FWD9!M K
public void sort(int[] data) { )hQ`l d7B
int[] temp=new int[data.length]; ]%mg(&p4
mergeSort(data,temp,0,data.length-1); YY]LK%-
} i]1[eGF
h\.UUC&<
private void mergeSort(int[] data, int[] temp, int l, int r) { # ^%'*/z
int i, j, k; R;;)7|;~
int mid = (l + r) / 2; +;*])N%q
if (l == r) ]k,fEn(
return; 65<p:
if ((mid - l) >= THRESHOLD) C?E;sRr0
mergeSort(data, temp, l, mid); c)Y I3G$
else gu"Agct4
insertSort(data, l, mid - l + 1); VvoJ85
if ((r - mid) > THRESHOLD) uIWCVR8`Y
mergeSort(data, temp, mid + 1, r); 1) @Wcc.
else wI`uAZ="
insertSort(data, mid + 1, r - mid); { !FrI@
_ H@pYMNH
for (i = l; i <= mid; i++) { ~gX@2!D5k
temp = data; D/{-
} R'9TD=qEK
for (j = 1; j <= r - mid; j++) { 4!monaB"e
temp[r - j + 1] = data[j + mid]; 6 #QS5
} 1F$a My?
int a = temp[l]; G LE`ba
int b = temp[r]; bAW;2 NB
for (i = l, j = r, k = l; k <= r; k++) { ?rv+ydR/q
if (a < b) { '!y ^
data[k] = temp[i++]; }>h?W1
a = temp; >i=O =w
} else { xDVzHgbf
data[k] = temp[j--]; (jQL?
b = temp[j]; @AyC0}
} mFo6f\DHr`
} ZNuyGo;
} 7p~@S4
2&=;$2?}
/** sN;U,{
* @param data yJKezIL\z
* @param l w[VWk
* @param i sA` bPhk
*/ N>gv!z[E
private void insertSort(int[] data, int start, int len) { }"3L>%Q5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HD`Gi0
} R)<>} y
} 3J[P(G>Q
} ;w@:
} ~xXB !K~C
>j$f$*x
堆排序： VW'e&v1.
DVCc^5#
package org.rut.util.algorithm.support; k:d'aP3
-gC=%0sp\
import org.rut.util.algorithm.SortUtil; .JH3,L"S^
!>2s5^JI9
/** -R:1-0I$
* @author treeroot [bv.`
* @since 2006-2-2 xeu] X|,
* @version 1.0 n#x{~oQc
*/ 3[8'pQ!&
public class HeapSort implements SortUtil.Sort{ <xc"y|7X
qWP1i7]=/
/* (non-Javadoc) Y$'fds4P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sG^b_3o)A
*/ :v&GAs6H
public void sort(int[] data) { _b#9^2o
MaxHeap h=new MaxHeap(); FiIN\
h.init(data); !H.&"~w@
for(int i=0;i h.remove(); IOfo]p-
System.arraycopy(h.queue,1,data,0,data.length); ~v<r\8`OI2
} 9{>m04888
Nf$Y-v?i
private static class MaxHeap{ tfdP#1E
-EITz
void init(int[] data){ L5eaQu
this.queue=new int[data.length+1]; 27Lya!/
for(int i=0;i queue[++size]=data; [#14atv
fixUp(size); Q_@ Z.{
} ~ae68&L6
} W'6*$Ron
&<v#^2S3
private int size=0; Z\@vN[[
YF."D%?
private int[] queue; K=!J=R;
G\Sd!'?p
public int get() { |e+I5
return queue[1]; wV U(Du
} q>H!?zi\Hy
(}Gl'.>\M
public void remove() { \8<bb<`
SortUtil.swap(queue,1,size--); W]rXt,{&
fixDown(1); ef|Y2<P
} -|V@zSKr3
file://fixdown %PyU3
private void fixDown(int k) { 3 :f5xF
int j; czedn_}%Q
while ((j = k << 1) <= size) { 5oORwOP
if (j < size %26amp;%26amp; queue[j] j++; tCA |sN
if (queue[k]>queue[j]) file://不用交换 -h.']^I
break; La3f{;|u5M
SortUtil.swap(queue,j,k); 85nUR[)h
k = j; ?(ks=rRK
} m6g+ B>
} |!&,etu
private void fixUp(int k) { d~28!E+
while (k > 1) { Hm4lR{A
int j = k >> 1; Tm`QZh3
if (queue[j]>queue[k]) (VC_vz-
break; mp@JsCU
SortUtil.swap(queue,j,k); LfF<wDvXf
k = j; Lmj?V1% V
} dJCu`34Y'|
} uOZ+9x(
lr^-
} KnU"49
T@k&YJ
} t6js@Ih
:*Ckq~[Hg
SortUtil： M@csB.'
`W|2Xi=^5
package org.rut.util.algorithm; "7gS*v,r
;'cv?3Y
import org.rut.util.algorithm.support.BubbleSort; Lu-owP7nB
import org.rut.util.algorithm.support.HeapSort; r;S%BFMJS
import org.rut.util.algorithm.support.ImprovedMergeSort; #JTi]U6`
import org.rut.util.algorithm.support.ImprovedQuickSort; U:8^>_
import org.rut.util.algorithm.support.InsertSort; #<se0CJB
import org.rut.util.algorithm.support.MergeSort; \'1%"JWK
import org.rut.util.algorithm.support.QuickSort; pz-`Tp w
import org.rut.util.algorithm.support.SelectionSort; V ;>{-p
import org.rut.util.algorithm.support.ShellSort; LscAsq<H<
ir/2/ E
/** ~\XB'
* @author treeroot d9sgk3K
* @since 2006-2-2 WhK?>u
* @version 1.0 -?@$`{-K
*/ 3)GXu>) t
public class SortUtil { u}#rS%SF*
public final static int INSERT = 1; VX;u54hS
public final static int BUBBLE = 2; '8%aq8
public final static int SELECTION = 3; ~ocd4,d=
public final static int SHELL = 4; R?X9U.AcW
public final static int QUICK = 5; 0aGfz=V&
public final static int IMPROVED_QUICK = 6; vy-{BH
public final static int MERGE = 7; d8Upr1_
public final static int IMPROVED_MERGE = 8; hRA.u'M
public final static int HEAP = 9; 9>zN27
t7-sCC0
public static void sort(int[] data) { z*x6V0'yt
sort(data, IMPROVED_QUICK); a>s v
} V&GFGds
private static String[] name={ sU{+.k{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" FeCQGT
}; K$(U>D|
WgY\m&
private static Sort[] impl=new Sort[]{ -3KB:K<
new InsertSort(), 21cIWvy
new BubbleSort(), SxQ|1:i%
new SelectionSort(), R[#5E|` `9
new ShellSort(), \ iP[iE=
new QuickSort(), zBc7bbK
new ImprovedQuickSort(), hvpn=0@M
new MergeSort(), %/'[GC'y!
new ImprovedMergeSort(), P.[>x
new HeapSort() {uckYx-A
}; # &M
nP0}vX)<
public static String toString(int algorithm){ w7%N=hL1
return name[algorithm-1]; s/A]&!`
} Q/0}AQO
8uCd|dJ
public static void sort(int[] data, int algorithm) { ~\iuV
impl[algorithm-1].sort(data); 5B98}N
} Ha 3XH_
e348^S&rG
public static interface Sort { ZJw92Sb
public void sort(int[] data); \,(tP:o
} E}a3.6)p
`SIJszqc
public static void swap(int[] data, int i, int j) { AM Rj N;
int temp = data; 9jvg[H
data = data[j]; /M'b137
data[j] = temp; m"v` E7G
} Ufo-AeQo
} V=S`%1dLN