[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; `Ig2f$}
} Oc/_T>
int i1=l; h. (;GJO
int i2=mid+1; ocuVDC
for(int cur=l;cur<=r;cur++){ !>2\OSp!
if(i1==mid+1) Is6']bYh
data[cur]=temp[i2++]; M7<#=pX&
else if(i2>r) o`8+#+@f7
data[cur]=temp[i1++]; 0G\myv
else if(temp[i1] data[cur]=temp[i1++]; 'kg]|"M
else [`-O-?=
data[cur]=temp[i2++]; Fx99"3`3
} n25tr'=
} &|\}\+0Z
Vv)E41
} [O+^eE6h
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改进后的归并排序: :+^$?[6]
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package org.rut.util.algorithm.support; e, 0I~:
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import org.rut.util.algorithm.SortUtil; F4<2.V)#-
g#%FY1xp
/** %PdYv _5
* @author treeroot MVv^KezD
* @since 2006-2-2 M@X#[w:
* @version 1.0 |21hY
*/ RowiSW
public class ImprovedMergeSort implements SortUtil.Sort { g7LW?Ewr
,Ve@=<
private static final int THRESHOLD = 10; <$6'Mzf
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/* HeifFJn
* (non-Javadoc) Y9L6W+=T
* N_k6UA9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u\geD
*/ ~d `4W<1a
public void sort(int[] data) { U@5Z9/n{
int[] temp=new int[data.length]; :Fd9N).%
mergeSort(data,temp,0,data.length-1); sK/"
} DF|lUO]:
vGHYB1=~
private void mergeSort(int[] data, int[] temp, int l, int r) { fToI,FA
int i, j, k; W8h\ s {
int mid = (l + r) / 2; -86:PL(I"
if (l == r) $cU/Im`
return; AHD%6 \$
if ((mid - l) >= THRESHOLD) pDq_nx9
mergeSort(data, temp, l, mid); ~WXxVm*@
else ^tcBxDC"]
insertSort(data, l, mid - l + 1); emPm^M5/K
if ((r - mid) > THRESHOLD) Bic { H
mergeSort(data, temp, mid + 1, r); &it/@8yH
else l*H"]6cXRL
insertSort(data, mid + 1, r - mid); r$Qh`[<
m9cT}x&j
for (i = l; i <= mid; i++) { u*N8s[s'
temp = data; wu&7#![,
} fr2w k}/b
for (j = 1; j <= r - mid; j++) { iZ\z!tHR
temp[r - j + 1] = data[j + mid]; mJR T+SZ
} }?kO<)d
int a = temp[l]; R_n-&d'PP
int b = temp[r]; Nb/%>3O@
for (i = l, j = r, k = l; k <= r; k++) { 17MjIX
if (a < b) { as!j0j%
data[k] = temp[i++]; Lta\AN!c
a = temp; 4:g:$s|SE[
} else { 0*@S-Lj^c
data[k] = temp[j--]; D+""o"%
b = temp[j]; jloyJ@ck
} <t37DnCgI
} In M'zAhb
} ]_8 \g`"u
xR`2+t&t
/** t&]Mt7
* @param data f"^tOgGH
* @param l K.m[S[cy
* @param i U~t(YT
*/ cpnwx1q@
private void insertSort(int[] data, int start, int len) { %WN2 xCSf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hj,x~^cS
} |?A-?-
} 0+pJv0u
} .9Fm>e+!C
} ZE`{J=,
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堆排序： = g}yA=.
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package org.rut.util.algorithm.support; 1_lL?S3,a@
w,9F riW
import org.rut.util.algorithm.SortUtil; 3vU (4}@
P$I\)Q H
/** =C)1NJx&~
* @author treeroot !F)oX7"
* @since 2006-2-2 ;D:T ^4
* @version 1.0 }*.*{I
*/ _AYF'o-Cm
public class HeapSort implements SortUtil.Sort{ qr6jn14.c
*/E{s?
/* (non-Javadoc) fif<[Ax
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @1@WB]mQQ
*/ tO3 ;;%
public void sort(int[] data) { 063;D+
MaxHeap h=new MaxHeap(); (Lnh> '2
h.init(data); ] ),'=@
for(int i=0;i h.remove(); `f]O
System.arraycopy(h.queue,1,data,0,data.length); CI{x/ e^(
} GNOC5 E$I
O]lfs>>x
private static class MaxHeap{ uLF55:`<
oVW?d]R
void init(int[] data){ mM.&c5U
this.queue=new int[data.length+1]; 9G~P)Z!0
for(int i=0;i queue[++size]=data; EA.U>5Fq
fixUp(size); rI/KrBM
} YyIt-fPZ
} %>TdTt
`l#g`~L
private int size=0; 8t%1x|!
a0.XJR{T"
private int[] queue; G\%hT5^
4+Y5u4`t
public int get() { \.] U
return queue[1]; -S@:
} =P{RHhWy;
's<}@-]
public void remove() { e{&gF1"[
SortUtil.swap(queue,1,size--); 3yN1cd"#?
fixDown(1); BL67sva;
} sa*-B
file://fixdown gp=0;#4 4
private void fixDown(int k) { o1\8>Ew
int j; &bQ^J%\
while ((j = k << 1) <= size) { 9"S3AEI
if (j < size %26amp;%26amp; queue[j] j++; fp0Va!T(V
if (queue[k]>queue[j]) file://不用交换 A_%w(7o"
break; M .,|cx
SortUtil.swap(queue,j,k); 2uIAnbW]M
k = j; FhGbQJ?[3
} Q*: Ow]
} *F0N'*
private void fixUp(int k) { iQF93:#
while (k > 1) { 9[Mu
int j = k >> 1; jLTs1`I/F
if (queue[j]>queue[k]) D$HxPfDZ
break; zeX?]@]Y
SortUtil.swap(queue,j,k); >nX'RE|F
k = j; EcU9Tm`h
} wal }[F#
} Sgj6tH2M
}_ E
} ]7;;uhn`
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} xpz Jt2S
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SortUtil： rQJoaP+\q
YC~+r8ME$j
package org.rut.util.algorithm; F/8y p<_r
J$0*K+m
import org.rut.util.algorithm.support.BubbleSort; ?W()Do1tR
import org.rut.util.algorithm.support.HeapSort; ?=/l@d
import org.rut.util.algorithm.support.ImprovedMergeSort; i+}M#Y-O
import org.rut.util.algorithm.support.ImprovedQuickSort; lgl/| ^ Uw
import org.rut.util.algorithm.support.InsertSort; ;XT$rtuX
import org.rut.util.algorithm.support.MergeSort; r_G`#Z_5F
import org.rut.util.algorithm.support.QuickSort; !SnpesTn
import org.rut.util.algorithm.support.SelectionSort; _),@^^&x
import org.rut.util.algorithm.support.ShellSort; A Ho<E"R\
<$E8T>U
/** M5]wU
* @author treeroot i|*:gH
* @since 2006-2-2 OR3TRa XD
* @version 1.0 A.n1|Q#
*/ RW5T}
public class SortUtil { a^BD55d?
public final static int INSERT = 1; \ CYu;
public final static int BUBBLE = 2; 4"{q|~&=:$
public final static int SELECTION = 3; JmkJ^-A 6
public final static int SHELL = 4; d=[.
public final static int QUICK = 5; @ o]F~x
public final static int IMPROVED_QUICK = 6; c c:xT0Y
public final static int MERGE = 7; ~c4Y*]J
public final static int IMPROVED_MERGE = 8; Ae1},2py
public final static int HEAP = 9; "'%x|nB
XIU2l}g
public static void sort(int[] data) { J{H475GqiT
sort(data, IMPROVED_QUICK); }U9e#>ex
} d<]/,BY'
private static String[] name={ )j](_kvK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ws=y*7$y
}; Mvux=Ws
H_9~gi
private static Sort[] impl=new Sort[]{ SLW1]ZaG
new InsertSort(), F)C8LH
new BubbleSort(), gN*8zui
new SelectionSort(), g& {YHq^+
new ShellSort(), {zw#My
new QuickSort(), gCmGFQE-f
new ImprovedQuickSort(), =3FXU{"Qi4
new MergeSort(), \-^3Pe,
new ImprovedMergeSort(), OA+W$
new HeapSort() d/e9LK
}; 7{6wNc
fy-(B;
public static String toString(int algorithm){ N3,EF1%
return name[algorithm-1]; l! GPOmf9`
} aD.A +es
D`u{U]
public static void sort(int[] data, int algorithm) { Ou/{PK}
impl[algorithm-1].sort(data); Q,scjt[
} k vb"n}
akR*|iK#b
public static interface Sort { Xh?{%?2
public void sort(int[] data); T+I|2HYqOj
} N7|ctO
6uDNqq
public static void swap(int[] data, int i, int j) { s;>jy/o0 s
int temp = data; gX[6WB"p
data = data[j]; y<)x`&pcD
data[j] = temp; f+rBIE
} >scEdeM
} wuPx6hCl