[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; !dZC-U~
} mp}ZHufG
int i1=l; "BK&C6]
int i2=mid+1; t/HE@xPxI5
for(int cur=l;cur<=r;cur++){ vrH/Z.WD
if(i1==mid+1) :Vv=p*~
data[cur]=temp[i2++]; <CeDIX t
else if(i2>r) aaLT%
data[cur]=temp[i1++]; hEDj"`Px
else if(temp[i1] data[cur]=temp[i1++]; 7Ij'!@no
else pZXva9bE
data[cur]=temp[i2++]; Ur_~yX]Mo
} m+CvU?)gJ
} F$d`Umqs;P
/']Gnt G.
} x6m21DWw
kYx|`-PA<r
改进后的归并排序: 0nBAO
8USF;k
package org.rut.util.algorithm.support; euQd
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import org.rut.util.algorithm.SortUtil; 3rs=EMz:w
!uHX2B+~
/** &Jq?tnNd
* @author treeroot L~~;i'J
* @since 2006-2-2 7GpSWM6
* @version 1.0 8hdd1lVKO8
*/ Wa , #
public class ImprovedMergeSort implements SortUtil.Sort { :h"Y>1P
`*N2x\+X
private static final int THRESHOLD = 10; jytfGE:
ZfS-W&6Z
/* {,,w5/k^
* (non-Javadoc) 6:@tHUm
* f~9ADb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @va6,^)
*/ 7|*|xLrVY
public void sort(int[] data) { (C1]R41'
int[] temp=new int[data.length]; D[ny%9 :
mergeSort(data,temp,0,data.length-1); {l![{
} H>k=V<
7h,SX]4Q
private void mergeSort(int[] data, int[] temp, int l, int r) { %*zgN[/w
int i, j, k; 't2"CPZ
int mid = (l + r) / 2; klv ]+F&[
if (l == r) !'MZeiLP
return; Vc}m_T]O
if ((mid - l) >= THRESHOLD) CKyX Z
mergeSort(data, temp, l, mid); )~s(7 4`}
else os"o0?
insertSort(data, l, mid - l + 1); Busxg?=
if ((r - mid) > THRESHOLD) }m(u oT~
mergeSort(data, temp, mid + 1, r); &*r YY\I
else &?v^xAr?B
insertSort(data, mid + 1, r - mid); +!CG'qyN>
c[f
for (i = l; i <= mid; i++) { ^|(F|Z
temp = data; XzkC ]e'
} UJ2Tj+
for (j = 1; j <= r - mid; j++) { g#W)EXUR
temp[r - j + 1] = data[j + mid]; v~9PS2
} >}Za)
int a = temp[l]; O$<kWSC
int b = temp[r]; BNnGtVAbZ
for (i = l, j = r, k = l; k <= r; k++) { R=xT\i{4h
if (a < b) { S!0<aFh
data[k] = temp[i++]; ==~X8k|{E
a = temp; 9H`Q |7g(5
} else { {b}Ri&oEOH
data[k] = temp[j--]; ^F/N-!}q
b = temp[j]; +<(N]w*
} D`V03}\-
} !D!Q]M5oU
} eE '\h
+m^ gj:yL
/** QQj)"XJ29
* @param data Y7{IF X
* @param l K]1A,Q
* @param i mY+Jju1
*/ P?\IlziCB
private void insertSort(int[] data, int start, int len) { q{nNWvL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /q0[T{Wz$
} M|w;7P}
} P|Dw+lQj
} (3C::B=
} |L11?{ K
nRzD[3I
堆排序： hQv~C4Wfrf
f![?og)I%
package org.rut.util.algorithm.support; sB"Oi|#lk
7jQOwzj
import org.rut.util.algorithm.SortUtil; 4$oNh)+/h
40w,:$
/** N7v7b<6
* @author treeroot Tu"bbc
* @since 2006-2-2 bH%k)
* @version 1.0 b3N1SC:Wn
*/ SxI='z_S.f
public class HeapSort implements SortUtil.Sort{ _Ryt|# y
c|.~f+
/* (non-Javadoc) -~n^?0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *<c, x8\s9
*/ 0Ihp`QGU:
public void sort(int[] data) { [+\=x[q
MaxHeap h=new MaxHeap(); G>&Tap>
h.init(data); 9)9p<(b$
for(int i=0;i h.remove(); hd^?mZ
System.arraycopy(h.queue,1,data,0,data.length); x1VBO.t=*
} >x]b"@Hkw
CoO..
private static class MaxHeap{ gi\2bzWkbX
S~X&^JvT
void init(int[] data){ c>!zJAB
this.queue=new int[data.length+1]; *-'u(o
for(int i=0;i queue[++size]=data; @~,&E*X! .
fixUp(size); 1zqIB")s>
} +m8CN(c
} ZfsM($|a
7}>Zq`]~
private int size=0; h8B:}_Cu
_IYd^c
private int[] queue; T#KF@8'-
<#/r.}.x
public int get() { (&t741DN|
return queue[1]; #;~`+[y?\
} ?-C=_eZJ
.$&mWytw=
public void remove() { =;Ap+}
SortUtil.swap(queue,1,size--); gT8Q:8f:
fixDown(1); z=%&?V
} :59fb"^$
file://fixdown ;\-f7!s
private void fixDown(int k) { Hj(ay48
int j; Lu?MRF f
while ((j = k << 1) <= size) { G%5bQ|O
if (j < size %26amp;%26amp; queue[j] j++; ]z3!hgTj
if (queue[k]>queue[j]) file://不用交换 >n3w'b
break; uy'm2
SortUtil.swap(queue,j,k); G8AT] =
k = j; paCC'*bv
} :x88
} oHh~!#u
private void fixUp(int k) { 11Sflj
while (k > 1) { m03D+@F
int j = k >> 1; f4[fXP;A
if (queue[j]>queue[k]) @N+ }cej
break; NN>E1d=
SortUtil.swap(queue,j,k); Ad7N'1O
k = j; A.-j5C4
} jR1t&UD3Y
} E&>3{uZI
tV.qdy/]}
} 8.JFQ/)i
$[(amj-;l
} 'C[{cr.`
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SortUtil： J34/rL/s
3QSA|
package org.rut.util.algorithm; ,jH<i.2R
l/*NscYtQ
import org.rut.util.algorithm.support.BubbleSort; c+S<U*
import org.rut.util.algorithm.support.HeapSort; vX?MB
import org.rut.util.algorithm.support.ImprovedMergeSort; Lsu_f'p0
import org.rut.util.algorithm.support.ImprovedQuickSort; >%6a$r~@
import org.rut.util.algorithm.support.InsertSort; ]cQYSN7!SY
import org.rut.util.algorithm.support.MergeSort; ({&\~"
import org.rut.util.algorithm.support.QuickSort; Y6W#uiqk
import org.rut.util.algorithm.support.SelectionSort; U)v){g3w)
import org.rut.util.algorithm.support.ShellSort; ?`T0zpC
|)5xmN]
/** Z01BzIsR
* @author treeroot S2+X/YeB
* @since 2006-2-2 ke\gzP/
* @version 1.0 "R<c
*/ 4C:-1gu7
public class SortUtil { LK>AC9ak<
public final static int INSERT = 1; ?58,Ja
public final static int BUBBLE = 2; |; [XZ ZZ
public final static int SELECTION = 3; p9X{E%A<:
public final static int SHELL = 4; 1Jm'9iy3
public final static int QUICK = 5; E^s<5BC;
public final static int IMPROVED_QUICK = 6; ccR#<Pb6q
public final static int MERGE = 7; t_xO-fT)
public final static int IMPROVED_MERGE = 8; S"=y>.#
public final static int HEAP = 9; L/Tsq=
3bsuE^,.@
public static void sort(int[] data) { b;;mhu[D
sort(data, IMPROVED_QUICK); 6Dl]d%.
} EN2H[i+,
private static String[] name={ |(eRv?Qy@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" simD<&p
}; !&(^R<-id
!#[B#DZc(
private static Sort[] impl=new Sort[]{ rd_!'pG
new InsertSort(), 1 lZRi-P
new BubbleSort(), ;9&#Sb/
new SelectionSort(), ;6)Onwx
new ShellSort(), 2#jBh
new QuickSort(), y/vGt_^;3<
new ImprovedQuickSort(), xcHuH-}
new MergeSort(), 3aY^6&
new ImprovedMergeSort(), L$zB^lSM
new HeapSort() 1XppC[))
}; cM?i _m
F=g+R~F
public static String toString(int algorithm){ n9H4~[JiC
return name[algorithm-1]; ITssBB9
} 'g5 Gdn
UG !+&ii|
public static void sort(int[] data, int algorithm) { 90Sp(
impl[algorithm-1].sort(data); 0FAe5 BE7
} < C1Jim
[,a2A
public static interface Sort { dy' J~Eo7
public void sort(int[] data); O~*`YsL9
} P->.eo#VG
b# |
public static void swap(int[] data, int i, int j) { gm8FmjZtf
int temp = data; 'kb|!
data = data[j]; -\|S=< g
data[j] = temp; |Y tZOQu
} 3;%dn\ D
} 360b`zS