[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; 5taT5?n2
} {[?(9u7R
int i1=l; 1NA.nw.
int i2=mid+1; ^sLdAC
for(int cur=l;cur<=r;cur++){ 3m!X/u
if(i1==mid+1) VQ9/Gxdeo
data[cur]=temp[i2++]; vuY~_
else if(i2>r) PBTnIU
data[cur]=temp[i1++]; ~%kkeh\j
else if(temp[i1] data[cur]=temp[i1++]; P:MT*ra*,
else [%1CRk
data[cur]=temp[i2++]; 57']#j#"hj
} >jc [nk
} ]K,Tnyp
0{}8(
} 6fEqqUeV
pYmk1!]/
改进后的归并排序: dE{dZ#Jfi
K:#I
package org.rut.util.algorithm.support; a'yK~;+_9
ML56k~"BL
import org.rut.util.algorithm.SortUtil; )W _v:?A9
68C%B9.b'
/** |"CZT#
* @author treeroot nazZ*lC
* @since 2006-2-2 ,uhb~N<
* @version 1.0 |~mOfuQb
*/ ra gXn
public class ImprovedMergeSort implements SortUtil.Sort { EDl!w:
9gK`E
private static final int THRESHOLD = 10; C7ScS"~
84zSK)=Y
/* @>2i+)=E5
* (non-Javadoc) o~y;j75{.*
* c2 C8g1n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C{xaENp
*/ uGK.\PB$
public void sort(int[] data) { =|y9UlsD
int[] temp=new int[data.length]; j[J-f@F \Y
mergeSort(data,temp,0,data.length-1); E,x+JeKV
} 0gP}zM73
'/p/8V.O.
private void mergeSort(int[] data, int[] temp, int l, int r) { TpwkD_fg
int i, j, k; .2Elr(&*h
int mid = (l + r) / 2; yEoF4bt
if (l == r) Ad9}9!<
return; ZI}Fom<
if ((mid - l) >= THRESHOLD) Q1I6$8:7
mergeSort(data, temp, l, mid); W/bQd)Jvk
else Ee%%d
insertSort(data, l, mid - l + 1); `MN4uC
if ((r - mid) > THRESHOLD) ,77d(bR<
mergeSort(data, temp, mid + 1, r); CXx*_@}MU
else A>;bHf@
insertSort(data, mid + 1, r - mid); (Y?gn)*t
[ =9T*Sp
for (i = l; i <= mid; i++) { ep)n_!$OH"
temp = data; `V)8 QRN(
} NgGp
for (j = 1; j <= r - mid; j++) { Y>dzR)~3[
temp[r - j + 1] = data[j + mid]; DGn;m\B
} ;~ $'2f~U
int a = temp[l]; XZ]uUP
int b = temp[r]; _P 3G
for (i = l, j = r, k = l; k <= r; k++) { rCbDu&k]
if (a < b) { SaAFz&WRl
data[k] = temp[i++]; Q}K"24`=
a = temp; b;W3j
} else { &4x}ppX
data[k] = temp[j--]; oC: {aK6\
b = temp[j]; G+"t/?/
} li'YDtMKCY
} JWhdMU
} :tB1D@Cb6
c&?m>2^6
/** /}fHt^2H
* @param data {{D)YldtA
* @param l :vqgGKml$
* @param i bL+_j}{:N
*/ RSyUaA
private void insertSort(int[] data, int start, int len) { D4lG[qb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0oZ= yh
} (pCrmyB
} Rn(ec
} SpLzm A
} 5z8d} I
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堆排序： fo#fg8zX%
*ebSq)
package org.rut.util.algorithm.support; {JO
$=8 NED5
import org.rut.util.algorithm.SortUtil; j@U]'5EVB
FaQe_;
/** b_#m}yZ6
* @author treeroot vrhT<+q
* @since 2006-2-2 JPc+rfF
* @version 1.0 $%CF8\0
*/ +\c5]`
public class HeapSort implements SortUtil.Sort{ ^T;*M_
:bu/^mW[
/* (non-Javadoc) V6&!9b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yz/md1T$
*/ jrlVvzZ
public void sort(int[] data) { ~Ei$nV
MaxHeap h=new MaxHeap(); ,]ma+(|
h.init(data); tqvN0vY5
for(int i=0;i h.remove(); D9CaFu
System.arraycopy(h.queue,1,data,0,data.length); J6s`'gFns
} dGYn4i2k?
Ustv{:7v
private static class MaxHeap{ EyD=q! ZVZ
*8yAG]z
void init(int[] data){ "3)C'WlEy/
this.queue=new int[data.length+1]; hl7bzKO*w
for(int i=0;i queue[++size]=data; Qcq`libK
fixUp(size); ?Wr+Q
} b9KP( _
} M=.n7RY-
.779pT!,M
private int size=0; ?cBwPetp
o/$}
private int[] queue; szZr4y<8|1
@;zl
public int get() { w;[NH/A^a
return queue[1]; fNli
} 6y%qVx#!
L3u&/Tn2
public void remove() { ^pAAzr"hv
SortUtil.swap(queue,1,size--); N ,'GN[s
fixDown(1); B4c]}r+
} n/;WxnnQ
file://fixdown rxgbV.tx
private void fixDown(int k) { =r?hgGWe
int j; |C;=-|
while ((j = k << 1) <= size) { Z58X5"
if (j < size %26amp;%26amp; queue[j] j++; (Ft+uuG
if (queue[k]>queue[j]) file://不用交换 jiV<+T?
break; ^EtMxF@D
SortUtil.swap(queue,j,k); k2omJ$?v
k = j; ITE{@1
} Xk~D$~4<
} Gv!2f
private void fixUp(int k) { 6"LcJ%o
while (k > 1) { U2tV4_ e
int j = k >> 1; &Cq`Y !y
if (queue[j]>queue[k]) 75cW_t,g
break; {NmWQyEv
SortUtil.swap(queue,j,k); T6y\|
k = j; '%s.^kn
} acajHs
} [i21FX
9N#_(uwt
} a+[KI
G}9Jg
} ~WeM TXF>y
>Eyt17_H"n
SortUtil： $u$!tj
e8>})
package org.rut.util.algorithm; qTRsZz@
,8S/t+H
import org.rut.util.algorithm.support.BubbleSort; .KB^3pOpx
import org.rut.util.algorithm.support.HeapSort; 2@n{yYwy
import org.rut.util.algorithm.support.ImprovedMergeSort; [`#CXq'
import org.rut.util.algorithm.support.ImprovedQuickSort; @wGPqg
import org.rut.util.algorithm.support.InsertSort; SB;&GHq"n
import org.rut.util.algorithm.support.MergeSort; .9/hHCp
import org.rut.util.algorithm.support.QuickSort; 2RVN\?s:
import org.rut.util.algorithm.support.SelectionSort; 7X`g,b!
import org.rut.util.algorithm.support.ShellSort; m4[;(1
BA@lk+aW
/** a5dLQxb
* @author treeroot -P(efYk
* @since 2006-2-2 +xh`Q=A
* @version 1.0 aq>kTaz
*/ a=|K%ii+Y
public class SortUtil { j2t7'bO_
public final static int INSERT = 1; )nC]5MXU
public final static int BUBBLE = 2; EKYY6S2
public final static int SELECTION = 3; .Yamc#A-
public final static int SHELL = 4; m<<+
public final static int QUICK = 5; a{L%7
public final static int IMPROVED_QUICK = 6; fbyd"(V8r
public final static int MERGE = 7; a(m2n.0'>
public final static int IMPROVED_MERGE = 8; e[{0)y>=
public final static int HEAP = 9; fF!Yp iI"
E+j/Cu
public static void sort(int[] data) { !4ocZmj\
sort(data, IMPROVED_QUICK); KaLzg5is
} 6B8VfQ9[
private static String[] name={ YU'k#\gi*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aG-vtld
}; w49t9~
gT6z9
private static Sort[] impl=new Sort[]{ 7m47rJyW4
new InsertSort(), bt@< ut\
new BubbleSort(), $H2u.U<ip
new SelectionSort(), DHg:8%3x
new ShellSort(), \,'m</o~,
new QuickSort(), Oz75V|D
new ImprovedQuickSort(), 7zl5yKN
new MergeSort(), PF0_8,@U
new ImprovedMergeSort(), 'NbHa!
new HeapSort() G~]Uk*M q
}; k`cfG\;r
^L,K& Jd
public static String toString(int algorithm){ ^7`BP%6
return name[algorithm-1]; [>vLf2OID
} v1#otrf
(fhb0i-
public static void sort(int[] data, int algorithm) { P7ao5NP
impl[algorithm-1].sort(data); :^<3>zk
} [DYQ"A=)d
=?5]()'*n
public static interface Sort { FBG4pb9=~
public void sort(int[] data); `C,n0'PL.
} HRpte=`q
$o!zUH~'v
public static void swap(int[] data, int i, int j) { Q*GN`07@?d
int temp = data; mwO6g~@`
data = data[j]; ^23~ZHu
data[j] = temp; m%0p\Y-/
} 9v#CE!
} k<z)WNBf