[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; r$7.
} &D,Iwq
int i1=l; d?,'$$aB
int i2=mid+1; { 3G
for(int cur=l;cur<=r;cur++){ v 6~9)\!j
if(i1==mid+1) 222 Y?3>@D
data[cur]=temp[i2++]; :4ryi&Y
else if(i2>r) wk(25(1q
data[cur]=temp[i1++]; 8-Abg:)
else if(temp[i1] data[cur]=temp[i1++]; ,OE&e*1
else tKbxC>w
data[cur]=temp[i2++]; /cjz=r1U>
} %iyc1]w{
} 1\}vU
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} 5`;SI36"
4TtC~#D:
改进后的归并排序: 3I)~;>meo
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package org.rut.util.algorithm.support; iw@rW5%'~
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import org.rut.util.algorithm.SortUtil; GQ2GcX(E(
aZ#FKp^8H
/** rRTKF0+
* @author treeroot ]so/AdT9hA
* @since 2006-2-2 m`yvZ4K!
* @version 1.0 i7x&[b
*/ "LBMpgpU
public class ImprovedMergeSort implements SortUtil.Sort { #bOv}1,s
Q*DT" W/0
private static final int THRESHOLD = 10; ]OAU&t{
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/* YteIp'T
* (non-Javadoc) bnxp[Qk|5
* Mz@{_*2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9~SPoR/_0
*/ _O`prX.:B0
public void sort(int[] data) { ~9>H(c
int[] temp=new int[data.length]; )CGQ}
mergeSort(data,temp,0,data.length-1); =RoE=)1&-
} r!r08yf
'+Dsmoy
private void mergeSort(int[] data, int[] temp, int l, int r) { xIdb9hm<
int i, j, k; JrP`u4f_
int mid = (l + r) / 2; E=NjWO
if (l == r) l`v5e"V
return; ;-db/$O
if ((mid - l) >= THRESHOLD) d$ouH%^cGu
mergeSort(data, temp, l, mid); &RR;'wLoQT
else WQ|Ufl;
insertSort(data, l, mid - l + 1); $^x=i;>aK.
if ((r - mid) > THRESHOLD) Fh~9(Y#
mergeSort(data, temp, mid + 1, r); Agcss20.
else c`E>7Hjr-
insertSort(data, mid + 1, r - mid); #MC#K{Xd
5Tsz|k
for (i = l; i <= mid; i++) { "x$@^
temp = data; ,&[o:jTk
} I4Do$&9<D
for (j = 1; j <= r - mid; j++) { CD1Ma8I8
temp[r - j + 1] = data[j + mid]; R|?n
} B`SX3,3
int a = temp[l]; <spG]Xa<
int b = temp[r]; x[A|@\Z
for (i = l, j = r, k = l; k <= r; k++) { 757&bH|a
if (a < b) { l)r\SE1
data[k] = temp[i++]; y-pdAkDh
a = temp; :zW? O#aL-
} else { Z$z-Hx@%
data[k] = temp[j--]; [* xdILj
b = temp[j]; 7F`\Gz_2
} qlhc"}5x }
} fTxd8an{
} FB k7Cn!
'4,?YcZ?S
/** `zoHgn7B9q
* @param data c |0p'EQ
* @param l !t%1G.
* @param i P|NGAd
*/ 5BrN uR$
private void insertSort(int[] data, int start, int len) { ju2H0AQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZayJllaq^
} |Iy;_8c
} {$S"Sj
} !(*&P
} m"L^tSD~
[REH*_
堆排序： B:>:$LIL
QPuc{NcB>
package org.rut.util.algorithm.support; O>E}Lu;|
{-)^?Zb @
import org.rut.util.algorithm.SortUtil; Csyh 'v
6;E3|st1X
/** /#9P0@Y
* @author treeroot |=5zI6pT
* @since 2006-2-2 "8Dm7)nB
* @version 1.0 lz^Vi!|p
*/ uh\G6s!4/
public class HeapSort implements SortUtil.Sort{ 5K Ij}VN
(N/u@M
/* (non-Javadoc) =Ti!9_~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :ok.[q
*/ 4 95Y<x}=
public void sort(int[] data) { 65Z}Hf
MaxHeap h=new MaxHeap(); gX"
h.init(data); 5Q"yn2b4
for(int i=0;i h.remove(); bI.hG32
System.arraycopy(h.queue,1,data,0,data.length); nw+t!C
} Sr+hB>{
=1Plu5
private static class MaxHeap{ C\{A|'l!x
m9h<)D'>
void init(int[] data){ ( yLu=
this.queue=new int[data.length+1]; )[eTZg
for(int i=0;i queue[++size]=data; qt:B]#j@
fixUp(size); xst-zfkH`
} 5$i(f8*
} 7,)E1dx -V
I(UK9H{0$
private int size=0; 0Hrvr
OcB&6!1u
private int[] queue; rzdQLan
qFVZhBC
public int get() { j6s j2D
return queue[1]; Z71_D
} {~&]
V 2Xv)
public void remove() { Zl[EpXlZ
SortUtil.swap(queue,1,size--); "tT4Cb3
fixDown(1); PU%Zay
} R(t%/Hvs$
file://fixdown vdXi'<
private void fixDown(int k) { \HxF?i "
int j; RZEq@q
while ((j = k << 1) <= size) { zMepF]V
if (j < size %26amp;%26amp; queue[j] j++; N75U.;U0
if (queue[k]>queue[j]) file://不用交换 <j,I@%
break; HFB>0<$
SortUtil.swap(queue,j,k); e'~Qe_
k = j; Uhu?G0>O
} SN|!FW.*:
} C;ab-gh
private void fixUp(int k) { }<kl3{)
while (k > 1) { ;0Uat
int j = k >> 1; N[9o6Nl|a
if (queue[j]>queue[k]) RrLj5Jq
break; j7d^ga-`
SortUtil.swap(queue,j,k); xJ#O|7N
k = j; 5X8 i=M;
} ]G&[P8hzB
} 'h ?
/@Jg [na
} ^G qO>1U
xqdkc^b
} krGIE}5
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SortUtil： YS4"TOFw
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package org.rut.util.algorithm; %#fjtbeB
ka=A:biz
import org.rut.util.algorithm.support.BubbleSort; 1/bTwzR.g
import org.rut.util.algorithm.support.HeapSort; &R/-~w5
import org.rut.util.algorithm.support.ImprovedMergeSort; Jj%xLv%
import org.rut.util.algorithm.support.ImprovedQuickSort; F.(W`H*1+
import org.rut.util.algorithm.support.InsertSort; gWro])3
import org.rut.util.algorithm.support.MergeSort; m,+E5^
import org.rut.util.algorithm.support.QuickSort; K}q5,P(
import org.rut.util.algorithm.support.SelectionSort; },<Y \
import org.rut.util.algorithm.support.ShellSort; ZC$u8$+P
n[BYBg1yG
/** lB_4jc
* @author treeroot nzO-\`40
* @since 2006-2-2 Mg0ai6KD
* @version 1.0 f:nXE&X[
*/ UQhD8Z'I.
public class SortUtil { @WXRZEz
public final static int INSERT = 1; pVl7]_=m
public final static int BUBBLE = 2; aeYz;&K
public final static int SELECTION = 3; 2./z6jXW_
public final static int SHELL = 4; EWl9rF@I
public final static int QUICK = 5; ">B&dNrt
public final static int IMPROVED_QUICK = 6; s o: o b}
public final static int MERGE = 7; }.u[';q]S
public final static int IMPROVED_MERGE = 8; gdAd7 T
public final static int HEAP = 9; /_JR7BB^X,
jn]l!nm
public static void sort(int[] data) { WCaMPz
sort(data, IMPROVED_QUICK); 6wOj,}2Mn
} ui"`c%2n
private static String[] name={ 1C=42ZZ&2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^^V+0 l
}; zWN]#W`
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private static Sort[] impl=new Sort[]{ X+;#^A3
new InsertSort(), ld%#.~Q
new BubbleSort(), :\mdVS!o
new SelectionSort(), <}mA>c'k
new ShellSort(), U_9|ED:
new QuickSort(), <%4pvn8d?&
new ImprovedQuickSort(), sj+ )
new MergeSort(), TJcHqzcUc
new ImprovedMergeSort(), PTpfa*t
new HeapSort() XThU+s9
}; V[8!ymi0
e*<pO@Uy
public static String toString(int algorithm){ YY>&R'3[
return name[algorithm-1]; 17:7w
} ?r$&O*;
G=Xas"|
public static void sort(int[] data, int algorithm) { 5a5JOl$8
impl[algorithm-1].sort(data); 4X:mb}(
} YYe<StyH
u#ocx[
public static interface Sort { '*U_!RmQ
public void sort(int[] data); _0&U'/cs
} #pD=TMefC
uYE"OUNWL
public static void swap(int[] data, int i, int j) { IQ JFL +f
int temp = data; GB*^?Ii
data = data[j]; !bW^G} <t
data[j] = temp; W9GjUswv!
} Oxi^&f||`
} AAi4} 8+\