[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; ~lV#- m*
} ykC3Z<pI.
int i1=l; E+Bc>xl@m
int i2=mid+1; ~R;/u")@e
for(int cur=l;cur<=r;cur++){ $6n J+
if(i1==mid+1) wNUT0+
data[cur]=temp[i2++]; _WNbuk0
else if(i2>r) bpc1>?
data[cur]=temp[i1++]; 8oE`>Y
else if(temp[i1] data[cur]=temp[i1++]; !/,oQoG
else x{;{fMN1
data[cur]=temp[i2++]; 5$ik|e^:y
} Nk@-yZ@,8
} Mst%]@TG
YXp\C"~g
} vN(~}gOd\
G/JGb2I/7|
改进后的归并排序: vEfj3+e
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package org.rut.util.algorithm.support; ! \s}A7
a &tWMxBr
import org.rut.util.algorithm.SortUtil; IFBt#]l0
(wL$h5SG
/** +=/j+S`
* @author treeroot wnC-~&+6
* @since 2006-2-2 Pyuul4(
* @version 1.0 )<HvIr(xr
*/ :WRD<D_4
public class ImprovedMergeSort implements SortUtil.Sort { =bh: U90y
1{M?_~g4
private static final int THRESHOLD = 10; y CHOg
waMV6w)<
/* i1x4$}
* (non-Javadoc) *w;?&)8%
* [.>=>KJ_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 79 4UY
*/ K1X-<5]{
public void sort(int[] data) { Y-})/zFc
int[] temp=new int[data.length]; yhgGvyD
mergeSort(data,temp,0,data.length-1); o1#3A
} #)}BY"C%
C]Fw*t
private void mergeSort(int[] data, int[] temp, int l, int r) { 6Mk#) ebM
int i, j, k; &/[MWQ
int mid = (l + r) / 2; T"P}`mT
if (l == r) ~U w<e~
return; oQ,n?on
if ((mid - l) >= THRESHOLD) KGOhoiR9:C
mergeSort(data, temp, l, mid); }-:B`:K&
else [NE!
insertSort(data, l, mid - l + 1); >h%>s4W
if ((r - mid) > THRESHOLD) U~=?I)Ni
mergeSort(data, temp, mid + 1, r); 2W0nA t
else hbYstK;]Z
insertSort(data, mid + 1, r - mid); g5#LoGc
+FNGRL
for (i = l; i <= mid; i++) { ;uAh)|;S#
temp = data; >e;jGk?-
} jS]Saqd
for (j = 1; j <= r - mid; j++) { Xj]9/?B?
temp[r - j + 1] = data[j + mid]; \ C:Gx4K
} I+Fy)=DO9
int a = temp[l]; p[&Jl
int b = temp[r]; S8qg"YR
for (i = l, j = r, k = l; k <= r; k++) { }Nn+Ny
if (a < b) { ,]\cf
data[k] = temp[i++]; P8=|#yCi
a = temp; `ZL^+h<b>M
} else { +E9G"Z65iP
data[k] = temp[j--]; &M5v EPR
b = temp[j]; GTB\95j]
} 9Avj\G
} Z5'^Hj1,
} a4uy}@9z
:V6 [_VaF
/** LS*L XC
* @param data zq+2@"q
* @param l nN$.^!;&
* @param i }s?3
*/ @ *Jbp
private void insertSort(int[] data, int start, int len) { d(}? \|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;m] nl_vg
} ,L
} l'<&H#A;'
} PO5,lcBD<
} #O_%!7M{4
M5RN Z%
堆排序： YCP D+
ta.Lq8/
package org.rut.util.algorithm.support; KiG19R$
CV HKP[-
import org.rut.util.algorithm.SortUtil; %wl:>9]
v9J1Hha#
/** w!*ZS~v/r
* @author treeroot 2Rys:$
* @since 2006-2-2 enxb pq#
* @version 1.0 gWjYS#D
*/ Vc(kw7
public class HeapSort implements SortUtil.Sort{ _fgsHx>l7
(soTkH:#
/* (non-Javadoc) c^"4l 9w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nv0D4 t
*/ ]LsT
public void sort(int[] data) { :)Es]wA#HZ
MaxHeap h=new MaxHeap(); WyV,(~y
h.init(data); z z]~IxQ
for(int i=0;i h.remove(); A]Hz?i
System.arraycopy(h.queue,1,data,0,data.length); y)LX?d
} _GY2|x2c
3R$R?^G
private static class MaxHeap{ Hwd^C2v
VO1
void init(int[] data){ hc$m1lLn
this.queue=new int[data.length+1]; B}NJs,'FJ
for(int i=0;i queue[++size]=data; ga KZ4#
fixUp(size); k"7ZA>5jk
} CUTjRWQ
} M'|[:I.V
MZ0cZv$v!~
private int size=0; g#fn(A
4T52vM
private int[] queue; )M.g<[=^
q%bFR[p<*
public int get() { (Of`VT3ZOA
return queue[1]; $#%R_G]
} +(`D'5EB(
G \a`F'Oo
public void remove() { })8D3kzX)
SortUtil.swap(queue,1,size--); Qd~7OH4Lp
fixDown(1); [V /f{y~{
} )6"p@1\u
file://fixdown BGVnL}0
private void fixDown(int k) { X9c<g;
int j; 731RqUR
while ((j = k << 1) <= size) { >8{{H"$;(
if (j < size %26amp;%26amp; queue[j] j++; bCTN^
if (queue[k]>queue[j]) file://不用交换 LIJ#nb
break; !iHC++D
SortUtil.swap(queue,j,k); NG\'Ii:-J
k = j; e|SNb*_
} 'G[G;?F
} H{_D#It
private void fixUp(int k) { ~U7Bo(EJp
while (k > 1) { qoT&N,/
int j = k >> 1; hX,RuI
if (queue[j]>queue[k]) ;j~%11
break; +p _?ekV\
SortUtil.swap(queue,j,k); EBWM8~Nm#
k = j; ?t}s3P!Q3w
} ])v61B
} IrRe6nf@K
=>o !
} |gk4X%o6
LB.B w
} +F,])p4,]i
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SortUtil： y] 9/Xr/
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package org.rut.util.algorithm; D'moy*E
rkh%[o9"/
import org.rut.util.algorithm.support.BubbleSort; E!WlQr:b$
import org.rut.util.algorithm.support.HeapSort; F&CvqPI
import org.rut.util.algorithm.support.ImprovedMergeSort; M4;M.zxJv
import org.rut.util.algorithm.support.ImprovedQuickSort; F;/^5T3wI
import org.rut.util.algorithm.support.InsertSort; g;q.vHvsc"
import org.rut.util.algorithm.support.MergeSort; @b2?BSdUp
import org.rut.util.algorithm.support.QuickSort; 1Xh@x
import org.rut.util.algorithm.support.SelectionSort; T.QJ#vKO0
import org.rut.util.algorithm.support.ShellSort; "Ar|i8^G3
[#X}(
/** K5<2jl3S
* @author treeroot it>Bf;
* @since 2006-2-2 y% !.:7Y
* @version 1.0 $zhvI*0
*/ >X[:(m'
public class SortUtil { ut]&3f''
public final static int INSERT = 1; iBWEZw)
public final static int BUBBLE = 2; ME)='~E
public final static int SELECTION = 3; W! |_ hL
public final static int SHELL = 4; 7c%dSs6
public final static int QUICK = 5; SMd[*9l [
public final static int IMPROVED_QUICK = 6; b{<$OVc
public final static int MERGE = 7; MkdC*|
public final static int IMPROVED_MERGE = 8; \Lbwfd=
public final static int HEAP = 9; grI#'x
;K4=fHl
public static void sort(int[] data) { AU}|o0Ur
sort(data, IMPROVED_QUICK); 2A*,9S|Y
} -W/D Cj<
private static String[] name={ 3*{l^<`:gA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #;1RStb:zj
}; <JXHg,Q
&{#6Z
private static Sort[] impl=new Sort[]{ 5yJ~ q
new InsertSort(), J?E!\V&U
new BubbleSort(), ^%6f%]_
new SelectionSort(), F}F{/
new ShellSort(), ",5=LW&,
new QuickSort(), W<O/LHKHdn
new ImprovedQuickSort(), <Vh5`-J
new MergeSort(), <Nloh+n=
new ImprovedMergeSort(), vy7?]}MvV
new HeapSort() wsR\qq
}; -4L27C
,DCUBD u&
public static String toString(int algorithm){ vUL@i'0&o
return name[algorithm-1]; S@ y! 0,
} ht+wi5b
o5+7Lt]
public static void sort(int[] data, int algorithm) { $QT% -9&
impl[algorithm-1].sort(data); E+ XR[p
} 7bVKH[
y+7+({w<
public static interface Sort { _S*QIbO
public void sort(int[] data); hr&UD|E=
} "cOBEhn%l
vZ6R>f
public static void swap(int[] data, int i, int j) { P $r!u%W
int temp = data; J!Rqm!)q
data = data[j]; LR4W
data[j] = temp; I;<__
} 8@6*d.+e
} :2b*E`+