[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; ueLdjASJ
} >vZ^D
int i1=l; KA{JSi
int i2=mid+1; u iR[V~
for(int cur=l;cur<=r;cur++){ zw}Wm4OH
if(i1==mid+1) a]t| /Mq
data[cur]=temp[i2++]; wvPS0]
else if(i2>r) ^-g-]?q
data[cur]=temp[i1++]; LDYk\[81
else if(temp[i1] data[cur]=temp[i1++]; x.ucsb
else w'&QNm>
data[cur]=temp[i2++]; Q+zy\T
} VskdC?yIp
} ~!#2s'
<]'1YDA
} u69fYoB'
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改进后的归并排序: ,A;wLI
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package org.rut.util.algorithm.support; 3)_(t.$D
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import org.rut.util.algorithm.SortUtil; c+.?+g
Dz<vIMLF{
/** Q)93+1]
* @author treeroot W3]?>sLE*
* @since 2006-2-2 6GsB*hW
* @version 1.0 2<TpNGXM_
*/ U$EQeb
public class ImprovedMergeSort implements SortUtil.Sort { ]_mcJ/6:
^$~&e :{
private static final int THRESHOLD = 10; 9IJc9Sv(
U IHe^?R
/* &e;GoJ
* (non-Javadoc) :0vKt 6>Sp
* 8~:s$~&r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0jMS!"k
*/ zTW)SX_O
public void sort(int[] data) { Qkx}A7sK
int[] temp=new int[data.length]; bxvpj
mergeSort(data,temp,0,data.length-1); &m{vLw
} ?xYoCn}Z
sO0j!;N
private void mergeSort(int[] data, int[] temp, int l, int r) { /5j]laYK)
int i, j, k; a4x(lx&
int mid = (l + r) / 2; MBO>.M$B
if (l == r) xMD]b
return; >/9on.
if ((mid - l) >= THRESHOLD) \KkAU6
mergeSort(data, temp, l, mid); \><v1x>;
else #jT=;G7f2
insertSort(data, l, mid - l + 1); r9whW;"q
if ((r - mid) > THRESHOLD) !"s~dL,7
mergeSort(data, temp, mid + 1, r); D |9ItxYu
else u8b^DB#+W
insertSort(data, mid + 1, r - mid); Bw4 _hlm
'WcP+4c
for (i = l; i <= mid; i++) { {7d\du&G
temp = data; +~'ap'k m
} o`~%}3
for (j = 1; j <= r - mid; j++) { O"m(C[+[
temp[r - j + 1] = data[j + mid]; LNI]IITx/
} lJdwbuB6
int a = temp[l]; ^8{:RiN6e~
int b = temp[r]; i~uoK7o|G
for (i = l, j = r, k = l; k <= r; k++) { xL\R-H^c]
if (a < b) { e3}o3c_
data[k] = temp[i++]; m!^z{S
a = temp; qExmf%q:q
} else { dobqYd4`
data[k] = temp[j--]; S*S@a4lV7
b = temp[j]; YHfk; FI
} 3mH(@-OA
} U_ *K%h\m
} _aK4[*jnqh
V J]S"
/** SEsLJ?Dv0
* @param data _>(qQ-Px
* @param l %C~LKs5oH
* @param i k/.a yLq
*/ !R3ZyZcX
private void insertSort(int[] data, int start, int len) { Y!fgc<]'&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xL}~R7
} 0/,Dy2h
} ??h4qJ
} WQ)vu&;
} &v.Nj9{zi
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堆排序： uYAMW{AT
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package org.rut.util.algorithm.support; 8 CCA}lOG
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import org.rut.util.algorithm.SortUtil; y4`uU1=
w6@8cNXK
/** n}toUqUnk\
* @author treeroot ,,CheRO
* @since 2006-2-2 &b!|Y
* @version 1.0 B|.8+Q
*/ =`KV),\
public class HeapSort implements SortUtil.Sort{ G_)(?
48"=,IrM
/* (non-Javadoc) {B)-+0 6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UQ.DKUg
*/ :Kx6|83
public void sort(int[] data) { >Z!H9]f(
MaxHeap h=new MaxHeap(); 2sOetmWE7
h.init(data); g"|Z1iy|9
for(int i=0;i h.remove(); 6;%Ajx
System.arraycopy(h.queue,1,data,0,data.length); \. _TOE9L
} I'a&n}jx
O+*<^*YyD
private static class MaxHeap{ jb0LMl}/A
RAi]9`*7
void init(int[] data){ w5R?9"d@
this.queue=new int[data.length+1]; #S*cFnd
for(int i=0;i queue[++size]=data; KdU&q+C^
fixUp(size); @zAav>
} K %Qj<{)
} I>(-&YbC
>w)A~ F<
private int size=0; #Oq~ZV|<l
hH*/[|z
private int[] queue; Lzy Ix!S
m5\/7 VC
public int get() { :+$/B N:iO
return queue[1]; EViQB.3w\
} >cRE$d?
GK8x<Aq%z
public void remove() { >do3*koA
SortUtil.swap(queue,1,size--); ZDt|g^
fixDown(1); p!RyxB1.|
} $hE,BeQ
file://fixdown 4}MZB*);0
private void fixDown(int k) { 2%gLq
int j; <6[P5>
while ((j = k << 1) <= size) { z2DjYTm[~
if (j < size %26amp;%26amp; queue[j] j++; _1U7@v:<@
if (queue[k]>queue[j]) file://不用交换 ebmU~6v k
break; E!}~j
SortUtil.swap(queue,j,k); o%V%@q H
k = j; a+#Aitd
} yjB.-o('
} DqbU$jt`
private void fixUp(int k) { +y\mlfJ.-b
while (k > 1) { Y.}8lh eH
int j = k >> 1; q:X&)f
if (queue[j]>queue[k]) 3tAX4DnYrq
break; V/CZcMY_
SortUtil.swap(queue,j,k); SRBQ"X[M2
k = j; `8<h aU
} Kta7xtu
} 4M{]YZMw8
6$_//
} j%@wQVxq
tG}cmK~%
} aH+n]J] =)
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SortUtil： CHo(:A.U>
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package org.rut.util.algorithm; ,~^BoH}
{c\KiWN
import org.rut.util.algorithm.support.BubbleSort; 6}S1um4 F
import org.rut.util.algorithm.support.HeapSort; +!9&zYu!
import org.rut.util.algorithm.support.ImprovedMergeSort; jo^+
import org.rut.util.algorithm.support.ImprovedQuickSort; vivU4:uH3
import org.rut.util.algorithm.support.InsertSort; ;"j>k>tg
import org.rut.util.algorithm.support.MergeSort; _7qGo7bpN
import org.rut.util.algorithm.support.QuickSort; DP<[Uz&
import org.rut.util.algorithm.support.SelectionSort; ts=KAdcJ
import org.rut.util.algorithm.support.ShellSort; TOvpv@?-
Z%1{B*(e
/** V-.Nc#
* @author treeroot +Oa+G.;)o4
* @since 2006-2-2 NP< {WL#
* @version 1.0 l7M![Ur
*/ 4!^flKZQ
public class SortUtil { oNK-^N?-T
public final static int INSERT = 1; 6i.!C5YX]
public final static int BUBBLE = 2; Y[WL}:"93
public final static int SELECTION = 3; UYW{AG2C
public final static int SHELL = 4; ,s.{R
public final static int QUICK = 5; Weu%&u-
public final static int IMPROVED_QUICK = 6; #mvOhu
public final static int MERGE = 7; ,[t>N>10TH
public final static int IMPROVED_MERGE = 8; v#WD$9QWs
public final static int HEAP = 9; T>\r}p
Sm(t"#dp
public static void sort(int[] data) { F3 z:|sTqc
sort(data, IMPROVED_QUICK); "- XJZ;5
} NwB;9ZhZ
private static String[] name={ ^ua8Ya
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @}B,l.Tj
}; "FfIq;
=p29}^@@t
private static Sort[] impl=new Sort[]{ D^jyG6Ch
new InsertSort(), Sx|)GTJJ|-
new BubbleSort(), )Fw{|7@N
new SelectionSort(), xKW`m
new ShellSort(), [>y0Xf9^
new QuickSort(), SB}0u=5
new ImprovedQuickSort(), q{*4BL'
new MergeSort(), 6}xFE]Df-Y
new ImprovedMergeSort(), ^geC?m
new HeapSort() }:f \!b
}; ;S_\- ]m&g
rW<sQ0
public static String toString(int algorithm){ C.rLog#
return name[algorithm-1]; VvJ]*D+e
} *4oj'}
tH\ aHU[
public static void sort(int[] data, int algorithm) { ;4] sP^+
impl[algorithm-1].sort(data); zJ7=r#b
} ]x<`(
JZM:R
public static interface Sort { 3duWk sERC
public void sort(int[] data); X5`#da
} 9u&q{I
_J+p[=[L
public static void swap(int[] data, int i, int j) { Q $5U5hb
int temp = data; C%)Xz
data = data[j]; mx:)&1
data[j] = temp; @4%a
} 3+` <2TP
} \gE6KE<?p