[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; %;(|KrUN
} cJ##K/es
int i1=l; 8o7]XZE=)
int i2=mid+1; yC0f/O
for(int cur=l;cur<=r;cur++){ %}MA5 t]o
if(i1==mid+1) } ndvV~*1
data[cur]=temp[i2++]; GGc_9?h
else if(i2>r) MIlCUk
data[cur]=temp[i1++]; E)Qh]:<2v
else if(temp[i1] data[cur]=temp[i1++]; `x$}~rP&)!
else e*2&s5 #RT
data[cur]=temp[i2++]; m>+,^`0
} f'6qJk%J
} jUJTcL
9MB\z"b?A
} qN1 -plY
vN,}aV2nq
改进后的归并排序: u1)TG"+0
$;2eH
package org.rut.util.algorithm.support; 1%hM8:)i_
`@$"L/AJ
import org.rut.util.algorithm.SortUtil; [pW1=tI
0?F@iB~1F
/** O:,2OMB}B`
* @author treeroot 2&gVZz
* @since 2006-2-2 Lk`k>Nn)
* @version 1.0 !q-:rW?c
*/ hr<7l C
public class ImprovedMergeSort implements SortUtil.Sort { %<wQ
loeLj4""
private static final int THRESHOLD = 10; zY+t,2z
=tS[&6/
/* xS~yH[k
* (non-Javadoc) yL;o{ G
* *>GIk`!wM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oDW<e'Jm
*/ 5:l*Ib:s7
public void sort(int[] data) { ^A11h6I
int[] temp=new int[data.length]; ^p"4)6p-W
mergeSort(data,temp,0,data.length-1); MdVCD^B
} a(}VA|l
N&I8nZ9
private void mergeSort(int[] data, int[] temp, int l, int r) { PTzp;.
int i, j, k; .*EOVo9S
int mid = (l + r) / 2; HzD>-f
if (l == r) ;&+[W(7Sy
return; `z-H]fU
if ((mid - l) >= THRESHOLD) *R_'$+
mergeSort(data, temp, l, mid); Jt-XmGULB
else 7>PF~=
insertSort(data, l, mid - l + 1); RwAbIXG{0
if ((r - mid) > THRESHOLD) Y!Uu173
mergeSort(data, temp, mid + 1, r); r/CEYEJ&X
else ^MW\t4pZ
insertSort(data, mid + 1, r - mid); fa!3/X+
_HWHQF7
for (i = l; i <= mid; i++) { c&7Do}
temp = data; E8T"{ R80
} 5,HCeN
for (j = 1; j <= r - mid; j++) { ~K5Cr
temp[r - j + 1] = data[j + mid]; r#_7]_3
} F5N>Uqr*oN
int a = temp[l]; v87$NQvwQ
int b = temp[r]; -yX.Jv
for (i = l, j = r, k = l; k <= r; k++) { ~In{lQ[QX
if (a < b) { 0Jm]f/iZ
data[k] = temp[i++]; )"(V*Z
a = temp; ./"mn3U
} else { hlAR[]
data[k] = temp[j--]; +(;8@"u
b = temp[j]; //\ds71h
} abM84EU
} 0s860Kn
} *'Z-OY<V
G_V.H\w
/** !"g=&Uy&
* @param data E4Y"X
* @param l OOCQsoN
* @param i /a@ kS
*/ +?qf`p.{
private void insertSort(int[] data, int start, int len) { wENzlXeOP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |'ZN!2u
} ^F>4~68d
} !+m@AQ:,
} E9^(0\Z I
} 0(wf{5
$ I#7dJ"*
堆排序： Hab!qWK`
'b8R#R\P
package org.rut.util.algorithm.support; zLh Fbyn(
bX7EO 8
import org.rut.util.algorithm.SortUtil; :FnOS<_B
$v FrUv
/** T}UT7W|
* @author treeroot V?=TVI*k
* @since 2006-2-2 ,,S9$@R
* @version 1.0 K6E}";;
*/ !]yQ1@)*'
public class HeapSort implements SortUtil.Sort{ rqF"QU=l
G]b8]3^
/* (non-Javadoc) mj)PLZ]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L*P_vCC
*/ [d}qG#N
public void sort(int[] data) { ,aI,2U91
MaxHeap h=new MaxHeap(); d;{y`4p)s
h.init(data); (/'h4KS@
for(int i=0;i h.remove(); KZ]r8
System.arraycopy(h.queue,1,data,0,data.length); .%_)*NUZ
} 4&|C}
@\ }sb]
private static class MaxHeap{ TfL4_IAG.
X&s7%]n+
void init(int[] data){ :ztyxJv1
this.queue=new int[data.length+1]; CQ<8P86gt
for(int i=0;i queue[++size]=data; ai4PM b$p
fixUp(size); 7UnzIe
} 5lO^;.cS,
} %8 qSv%_
t')h{2&&!2
private int size=0; `Z:3`7c
;J'OakeVO
private int[] queue; "MTWjW*6
z4g+2f7h-X
public int get() { eO'xkm
return queue[1]; )`<6taKx@n
} @YCv
zHV|-R
public void remove() { L%f;J/
SortUtil.swap(queue,1,size--); 57U%`
fixDown(1); B3Mx,uXT\
} f4 Q( 1(C
file://fixdown [g+y_@9s
private void fixDown(int k) { PT+c&5AS
int j; _e_4Q)z-a
while ((j = k << 1) <= size) { x:qr\Rz
if (j < size %26amp;%26amp; queue[j] j++; H-Pq!9[DB
if (queue[k]>queue[j]) file://不用交换 AQe!Sqg'
break; lj*8mS/;h
SortUtil.swap(queue,j,k); X($6IL6m
k = j; }%+qP+O\
} Y[?`\c|
} LP,9<&"<
private void fixUp(int k) { bK<}0Ja[
while (k > 1) { v~}5u 5$O
int j = k >> 1; YwXXXh
if (queue[j]>queue[k]) 847 R
break; %[XY67A3I
SortUtil.swap(queue,j,k); GQ<Ds{exs>
k = j; Y#`Lcg+r,
} V}SyD(8~
} iD<6t_8),
\e|U9;Mf
} izf~w^/
y^G>{?Tha
} o!utZmk$
6|^0_6_
SortUtil： n8$=f'Hgb
XCm\z9F
package org.rut.util.algorithm; P_}/#N{C
7b46t2W<
import org.rut.util.algorithm.support.BubbleSort; y:,9I`aW
import org.rut.util.algorithm.support.HeapSort; ;R!*I%
import org.rut.util.algorithm.support.ImprovedMergeSort; Ft) lp>3gv
import org.rut.util.algorithm.support.ImprovedQuickSort; 5z~\5x
import org.rut.util.algorithm.support.InsertSort; \yG`Sfu2
import org.rut.util.algorithm.support.MergeSort; JpmB;aL#%
import org.rut.util.algorithm.support.QuickSort; ]n5"Z,K
import org.rut.util.algorithm.support.SelectionSort; -;>#3O-
import org.rut.util.algorithm.support.ShellSort; (zC
JOHRmfqR
/** (]XbPW
* @author treeroot `L\)ahM
* @since 2006-2-2 thptm
* @version 1.0 #k9<
*/ +#s;yc#=2
public class SortUtil { f;wc{qy
public final static int INSERT = 1; xr.XU'
public final static int BUBBLE = 2; <s}|ZnGE
public final static int SELECTION = 3; 3Z1OX]R
public final static int SHELL = 4; W' ep6O
public final static int QUICK = 5; J$QBI&D
public final static int IMPROVED_QUICK = 6; (a }J$:
public final static int MERGE = 7; vbp-`M(
public final static int IMPROVED_MERGE = 8; ;v_V+t<$
public final static int HEAP = 9; O:^'x*}
j#VIHCzlr
public static void sort(int[] data) { wbi3lH:;
sort(data, IMPROVED_QUICK); U^rm:*f
} Sl>>SP
private static String[] name={ DjwQ`MA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^=0$
}; 9cfR)*Q
8%ik853`
private static Sort[] impl=new Sort[]{ b+@D_E-RJ
new InsertSort(), IqUp4}
new BubbleSort(), Z>2]Xx% \
new SelectionSort(), HabzCH
new ShellSort(), @Tr&`Hi
new QuickSort(), M3(k'q7&:
new ImprovedQuickSort(), T4r5s
new MergeSort(), NR4Jn?l{
new ImprovedMergeSort(), ~+HoSXu@E
new HeapSort() #)]c0]p
}; Uo6(|mm
DMd ,8W7a
public static String toString(int algorithm){ J?%}=_fsa
return name[algorithm-1]; -=)-sm'
} "- eZZEl(
<'&F;5F3V
public static void sort(int[] data, int algorithm) { hS:jBp,
impl[algorithm-1].sort(data); +O+<Go@a
} XdsJwn F
ooE{V*Ie
public static interface Sort { O k7zpq
public void sort(int[] data); ZJ(rG((!
} os$nL'sq
O?ktWHUx
public static void swap(int[] data, int i, int j) { =& -[TPW
int temp = data; OOB^gf}$'
data = data[j]; zZ=$O-&%
data[j] = temp; YH\j@^n
} |pW\Ec#(
} jPk c3dG +