[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; &#{Z(h.de
} V\ZGd+?
int i1=l; UOv+T8f=
int i2=mid+1; !Q2d(H>
for(int cur=l;cur<=r;cur++){ XRM_x:+]
if(i1==mid+1) $v4.sl:x
data[cur]=temp[i2++]; JFcLv=U
else if(i2>r) Qp)v?k ]
data[cur]=temp[i1++]; Vz~{UHH6
else if(temp[i1] data[cur]=temp[i1++]; ?8npG]L)
else tU}h~&M
data[cur]=temp[i2++]; @K &GJ
} B3pCy~*5
} Si2k"<5U
@>r._~
} >c1qpk/
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改进后的归并排序: *'Sd/%8{
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package org.rut.util.algorithm.support; !,wIQy_e4
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import org.rut.util.algorithm.SortUtil; x[FJgI'r
lHN5Dr
/** sXLq*b?
* @author treeroot u@Ih GME
* @since 2006-2-2 \pa"%c)
* @version 1.0 ]R+mKUZ9
*/ {2O1"|s ,
public class ImprovedMergeSort implements SortUtil.Sort { gh/EU/~d
a@_4PWzF:
private static final int THRESHOLD = 10; ~8'sBT
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/* Zi*2nv'
* (non-Javadoc) kvL=> A
* !j9t*2m[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) epA:v|S
*/ ;5]Lf$tZ
public void sort(int[] data) { )Kc<j!8-[
int[] temp=new int[data.length]; $SlIr<'*"
mergeSort(data,temp,0,data.length-1); %f&/E"M
} K0u|U`
/C:Y94B-z
private void mergeSort(int[] data, int[] temp, int l, int r) { m ifxiV
int i, j, k; \r/rBa\
int mid = (l + r) / 2; ? ^0:3$La
if (l == r) Z)I+@2
return; 29;?I3< *
if ((mid - l) >= THRESHOLD) G?L HmTHg
mergeSort(data, temp, l, mid); q$0*b]=E
else Mo|;'+
insertSort(data, l, mid - l + 1); k0OYJ/
if ((r - mid) > THRESHOLD) Y+kfBvxyf
mergeSort(data, temp, mid + 1, r); %|s;C
else }n]Ng]KM`
insertSort(data, mid + 1, r - mid); ;,hwZZA
iw3FA4{(
for (i = l; i <= mid; i++) { >nJ\BPx
temp = data; !y\'EW3|G
} }5ret
for (j = 1; j <= r - mid; j++) { Gw}%{=D9
temp[r - j + 1] = data[j + mid]; n<Z({\9&H
} tIWmp30S
int a = temp[l]; |6.l7u?d
int b = temp[r]; p2hB8zL
for (i = l, j = r, k = l; k <= r; k++) { =mO vs
if (a < b) { 2i)^!c
data[k] = temp[i++]; bg!/%[ {M
a = temp; W,K;6TZhh
} else { Ansk,$
data[k] = temp[j--]; _zR+i]9
b = temp[j]; +Zb;Vn4
} (of#(I[m7
} qrb[-|ie&
} !]"@kl%
sfpZc7
/** Q)~aiI0
* @param data b:U$x20n$
* @param l g{7.r-uu
* @param i AuvkecuIh
*/ G~F b
private void insertSort(int[] data, int start, int len) { B7VH<;Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .yMEIUm
} OC_+("N
} n7zm>&
} R"-mKT}
} ^PDJ0k/u1
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堆排序： vHgi<@u
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package org.rut.util.algorithm.support; E~DQ-z
uu-PJTNZ
import org.rut.util.algorithm.SortUtil; -"R2
?j'7l=94A
/** DF&(8NoX~
* @author treeroot oK9( /v
* @since 2006-2-2 > $O]Eu!
* @version 1.0 S4Pxc ]!
*/ (9tX5$e6N
public class HeapSort implements SortUtil.Sort{ EGGWrl}1
~IY%
/* (non-Javadoc) GF"hx`zyJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]{sU&GqBLe
*/ Ryl:a\
public void sort(int[] data) { "SNn^p59k
MaxHeap h=new MaxHeap(); |'e^QpU5
h.init(data); g!FuY/%+
for(int i=0;i h.remove(); [T|aw1SoN
System.arraycopy(h.queue,1,data,0,data.length); t=BUN
} N+9VYH"*
)~GmU9f
private static class MaxHeap{ #%pI(,o=
h8x MI
void init(int[] data){ AgWa{.`f:
this.queue=new int[data.length+1]; ADz ^\
for(int i=0;i queue[++size]=data; X@--m6-
fixUp(size); ^3G{|JB!+
} kYM~d07 V
} |O{m2Fi
272q1~&
private int size=0; F6LH $C
-zCH**y%1
private int[] queue; w0[6t#$F
ZFA`s qT
public int get() { 4`lLf
return queue[1]; [xbSYu,&
} {yBs7[Wn
1m'k|Ka
public void remove() { 59 h]UX=
SortUtil.swap(queue,1,size--); Ka'=o?'B5
fixDown(1); C0sX gM
} Vouvr<43o
file://fixdown 1ufp qqk
private void fixDown(int k) { J9..P&c\
int j; ISzqEi
while ((j = k << 1) <= size) { $6#CqWhI
if (j < size %26amp;%26amp; queue[j] j++; L,HhbTRca
if (queue[k]>queue[j]) file://不用交换 `A,-@`p
break; #{6{TFx\
SortUtil.swap(queue,j,k); l?\jB\,
k = j; <h!_>:2L
} =R^%(Py
} O24m;oHM
private void fixUp(int k) { 99]R$eT8
while (k > 1) { \/93Dz
int j = k >> 1; 0^v`T%|fTX
if (queue[j]>queue[k]) KsddA
break; 'Y?"{HZ
SortUtil.swap(queue,j,k); x/%aM1"X^
k = j; w{{gu1#]G
} .nO\kgoK
} &U{#Kt5q
C/_ZUF(V
} 2d>z1%'
Oylf<&knF\
} 32(^Te]:
^Xz@`_I
SortUtil： nI[os
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package org.rut.util.algorithm; bAdn &
#`~C)=-
import org.rut.util.algorithm.support.BubbleSort; x!hh"x
import org.rut.util.algorithm.support.HeapSort; Dxtp2wu%t
import org.rut.util.algorithm.support.ImprovedMergeSort; )Fc%+TpKi
import org.rut.util.algorithm.support.ImprovedQuickSort; QER?i;-wb
import org.rut.util.algorithm.support.InsertSort; D,FHZDt
import org.rut.util.algorithm.support.MergeSort; u]:oZMnj
import org.rut.util.algorithm.support.QuickSort; 9U7nKJ+iby
import org.rut.util.algorithm.support.SelectionSort; %J#YM'g
import org.rut.util.algorithm.support.ShellSort; ;$HftG>B
K:J3Z5"
/** 3N8t`N
* @author treeroot QemyCCP+
* @since 2006-2-2 >3ZFzh&OYQ
* @version 1.0 AWcLUe{
*/ ^0Zf,40
public class SortUtil { A4Rug\p]
public final static int INSERT = 1; ?llXd4
public final static int BUBBLE = 2; ky8_UnaO
public final static int SELECTION = 3; W=lyIb{?^0
public final static int SHELL = 4; \1d(9jR
public final static int QUICK = 5; ~Cbc<[}
public final static int IMPROVED_QUICK = 6; rW<KKGsRWQ
public final static int MERGE = 7; T _r:4JS
public final static int IMPROVED_MERGE = 8; md=TjMaY
public final static int HEAP = 9; RPwbTAl}
bw(a6qKK
public static void sort(int[] data) { LI'6R=
sort(data, IMPROVED_QUICK); dA#Q}.*r
} <5d~P/,
private static String[] name={ :8I9\eet3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B`YTl~4
}; @X%C>iYa9
imo$-}A
private static Sort[] impl=new Sort[]{ Ac96 [
new InsertSort(), ^"2i
new BubbleSort(), ]99|KQ<s
new SelectionSort(), x`U^OLV
new ShellSort(), wYdb*"R
new QuickSort(), u&^b~#T
new ImprovedQuickSort(), S3F;(PDzy
new MergeSort(), 2^Eg9y'
new ImprovedMergeSort(), !6n_}I-W
new HeapSort() >l]Xz*HE
}; 5rwu!Y;7*
%!]@J[*1
public static String toString(int algorithm){ wHzEMwY_
return name[algorithm-1]; !-ok"k0,u
} [\'%?BH(^
t;\kR4P
public static void sort(int[] data, int algorithm) { 81](T<
impl[algorithm-1].sort(data); bG7O
} cq5jPZ}
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public static interface Sort { ;}7Rjl#
public void sort(int[] data); E08klC0
} Q8C_9r/:N>
WM Fb4SUR
public static void swap(int[] data, int i, int j) { C`K?7v3$m
int temp = data; bT\1>
data = data[j]; 2I%MAb&1@
data[j] = temp; %.vQU @2A
} ;>#wU'
} < nXL