[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; i)o;,~ee
} *y*tI}
int i1=l; "CT}34l
int i2=mid+1; !4vb{AH
for(int cur=l;cur<=r;cur++){ Tn}`VW~
if(i1==mid+1) zeHF-_{
data[cur]=temp[i2++]; U>E: Ub0r
else if(i2>r) fwFJe(.
data[cur]=temp[i1++]; xol%\$|
else if(temp[i1] data[cur]=temp[i1++]; *): |WDR
else Cs6`lX >
data[cur]=temp[i2++]; fg^25g'_
} ZRagM'K
} OUv<a`0
pLB2! +
} UCLM*`M
d05xn7%!{
改进后的归并排序: ,Xn2xOP
n%&L&G
package org.rut.util.algorithm.support; Zhq_ pus"a
$D^\[^S
import org.rut.util.algorithm.SortUtil; P8d
+~^S'6yB
/** G(&[1V%x
* @author treeroot ,9P-<P
* @since 2006-2-2 TpKAdrY
* @version 1.0 uY&1[(Pb
*/ /f3/}x!po
public class ImprovedMergeSort implements SortUtil.Sort { =_dM@j
^[?y 2A:
private static final int THRESHOLD = 10; <~smBd
p;+O/'/j
/* C?zS}ob
* (non-Javadoc) kTb$lLG\xk
* !#KKJ`uB"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ku]5sd >b
*/ \=ML*Gi*
public void sort(int[] data) { ipv5JD[
int[] temp=new int[data.length]; <Ua~+U(FR0
mergeSort(data,temp,0,data.length-1); 3B1\-ry1M
} w]wZJ/U`
]01`r/->\
private void mergeSort(int[] data, int[] temp, int l, int r) { 0'Pjnk-i
int i, j, k; VE )D4RL
int mid = (l + r) / 2; Fz7t84g(
if (l == r) Q|(}rIWOQA
return; s6 yvq#:
if ((mid - l) >= THRESHOLD) T2e-RR
mergeSort(data, temp, l, mid); C%o|}iv"
else mU/o%|h
insertSort(data, l, mid - l + 1); *g(d}C!
if ((r - mid) > THRESHOLD) hFIh<m=C?Y
mergeSort(data, temp, mid + 1, r); cbJgeif
else `|'w]rj:"+
insertSort(data, mid + 1, r - mid); `nPdZ.
H/D=$)3op
for (i = l; i <= mid; i++) { F!vrvlD`s
temp = data; j6qtR$l|
} 7V"?o
for (j = 1; j <= r - mid; j++) { W'./p"2g
temp[r - j + 1] = data[j + mid]; @>8(f#S%
} 7Nq< o5
int a = temp[l]; V[tebv!
int b = temp[r]; YdhTjvx
for (i = l, j = r, k = l; k <= r; k++) { ?H=YJK$k
if (a < b) { sVFO&|L
data[k] = temp[i++]; P#O"{+`
a = temp; cE\w6uBR1
} else { K. ;ev
data[k] = temp[j--]; t#NPbLZ
b = temp[j]; FZ-Wgh 0z
} (!}N&!t
} G+ /Q!ic
} ,>j3zjf^
xs"i_se
/** h"`\'(,X
* @param data YkKu4f
* @param l 'LYDJ~
* @param i 2/?Zp=|j\
*/ C[^VM$
private void insertSort(int[] data, int start, int len) { lJK]S=cd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tia}&9;
} ,P~e)<.
} J}V4.R5d
} aq?bI:>8
} 9)!Ksg(h
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堆排序： xQFRM aQE
Id=20og
package org.rut.util.algorithm.support; iJTG+gx
4E''pW]8
import org.rut.util.algorithm.SortUtil; .eJKIck
Vl5r~+$|
/** Igo`\JY
* @author treeroot %xgP*%Sv2
* @since 2006-2-2 .O-)m'5
* @version 1.0 5Q10Ohh
*/ o]? yyP
public class HeapSort implements SortUtil.Sort{ v^C\ GDH
3!P^?[p3
/* (non-Javadoc) Q6 *n'6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) | R,dsBd
*/ PF4[;ES'
public void sort(int[] data) { fG2)r
MaxHeap h=new MaxHeap(); >{^_]phlb
h.init(data); !.R-|<2|6
for(int i=0;i h.remove(); neEqw+#Z
System.arraycopy(h.queue,1,data,0,data.length); BValU
} X_PzK'#m
DwBe_h.
private static class MaxHeap{ OS[ s Qo5
2f(`HSC'
void init(int[] data){ `q}D#0
this.queue=new int[data.length+1]; LW=qX%o{
for(int i=0;i queue[++size]=data; =9&2udV1
fixUp(size); JQ+Mg&&Q
} 48p3m)5
} KDN#CU
V FM[-
private int size=0; ?c.\\2>|F
HVM%B{(
private int[] queue; I(6%'s2
U#f*
public int get() { Zl5DlRuw
return queue[1]; 0hS&4nW
} IR/S`HD_
KE\>T:
public void remove() { ?"b __(3
SortUtil.swap(queue,1,size--); jnV#Q ;
fixDown(1); Gr({30"8
} q~qz^E\T
file://fixdown kV8R.Baf3
private void fixDown(int k) { ` k] TOc
int j; >D=X Tgqqq
while ((j = k << 1) <= size) { b8a(.}8*
if (j < size %26amp;%26amp; queue[j] j++; frbd{o
if (queue[k]>queue[j]) file://不用交换 uNf'Zeo
break; c:${qY:!
SortUtil.swap(queue,j,k); rT="ciQ
k = j; ,IiKe_B
} B~o3Z
} ^ iu)vED
private void fixUp(int k) { 8z93ETv7`
while (k > 1) { -dMH>e0
int j = k >> 1; 2`i&6iz
if (queue[j]>queue[k]) [CHN3&l-5S
break; #mH28UT
SortUtil.swap(queue,j,k); ?3DL .U{
k = j; /8Lb_QH{
} !UzE&CirV
} ,vR>hyM
}ll&EB
} ccv
0Cc3NNdz
} o=VZ7]
;$eY#ypx
SortUtil： bP:u`!p -i
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package org.rut.util.algorithm; "4XjABJ4'
!@V]H
import org.rut.util.algorithm.support.BubbleSort; s\'t=}0q
import org.rut.util.algorithm.support.HeapSort; -/8V2dv3
import org.rut.util.algorithm.support.ImprovedMergeSort; ;4+z~7Je]^
import org.rut.util.algorithm.support.ImprovedQuickSort; \1R*M
import org.rut.util.algorithm.support.InsertSort; Xk:x=4u&
import org.rut.util.algorithm.support.MergeSort; hj=n;,a9
import org.rut.util.algorithm.support.QuickSort; covCa)kf
import org.rut.util.algorithm.support.SelectionSort; z%fjG}z
import org.rut.util.algorithm.support.ShellSort; #~Kno@
j\#)'>"
/** C4E*q3[Y
* @author treeroot D[T\_3W
* @since 2006-2-2 L{sFR^-G
* @version 1.0 HmXxM:[4;
*/ pDC`Fi
public class SortUtil { L `2{H%J`
public final static int INSERT = 1; dsEvpa$?
public final static int BUBBLE = 2; k8Dk;N
public final static int SELECTION = 3; QKk7"2t|
public final static int SHELL = 4; ,9OER!$y
public final static int QUICK = 5; N#J8 4i;ry
public final static int IMPROVED_QUICK = 6; :4:U\k;QwA
public final static int MERGE = 7; 6hcs)X7m
public final static int IMPROVED_MERGE = 8; #E4oq9{0*W
public final static int HEAP = 9; ^g'uR@uU
N]BH67<
public static void sort(int[] data) { w&U28"i>
sort(data, IMPROVED_QUICK); :hHKm|1FE
} ]_>38f7h
private static String[] name={ >U:-U"rA?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;{m;CKHI
}; MO]zf3f!
e{: -N
private static Sort[] impl=new Sort[]{ be6`Sv"H
new InsertSort(), vSQB~Vw8t
new BubbleSort(), $jC+oYXj
new SelectionSort(), JWt@vf~
new ShellSort(), #,jm3Mqj
new QuickSort(), 3&X5*-U
new ImprovedQuickSort(), 'fb&3
new MergeSort(), ,[n=PJVw/
new ImprovedMergeSort(), q:_-#u
new HeapSort() s_u! RrC
}; 0s4]eEXH
gYL#} )g
public static String toString(int algorithm){ DUf. F
return name[algorithm-1]; %z1hXh#+
} y_IF{%i
BQMo*I>I
public static void sort(int[] data, int algorithm) { CIR2sr0a
impl[algorithm-1].sort(data); h#h)=;
} ud(w0eX
B)DtJf
public static interface Sort { wh]v{Fi'
public void sort(int[] data); <.|]%7
} -P]onD
5IG#-Q(6sp
public static void swap(int[] data, int i, int j) { .v) A|{:2
int temp = data; `?N|{kb
data = data[j]; P\X$fD
data[j] = temp; %F*h}i
} >+BLD
} Kn+B):OY+