[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!ns
} Xoq -
int i1=l; ;<F^&/a|yQ
int i2=mid+1; uaLjHR0
for(int cur=l;cur<=r;cur++){ 8|!"CQJ|H
if(i1==mid+1) (Dba!zSs
data[cur]=temp[i2++]; *u[@C
else if(i2>r) /Ea&Zm
data[cur]=temp[i1++]; (2RuQgO
else if(temp[i1] data[cur]=temp[i1++]; B\ZCJaMb
else ^%U`|GBZp
data[cur]=temp[i2++]; +t]Ge >S
} P+e{,~o
} p7.~k1h
pQ ul0]
} zf\$T,t)
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改进后的归并排序: Io/;+R.
q03nu3uDI
package org.rut.util.algorithm.support; @c>MROlrlF
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import org.rut.util.algorithm.SortUtil; K'K/}q<
LF:~& m
/** XHJ/211
* @author treeroot 6jov8GIAt
* @since 2006-2-2 J0t_wMJa
* @version 1.0 M@pF[J/
*/ 4jVd
public class ImprovedMergeSort implements SortUtil.Sort { 3]&le[.
`0W+(9}
private static final int THRESHOLD = 10; $9G".T
d]?fL&jr
/* W yP]]I.
* (non-Javadoc) zTn.#-7y
* --vJR/-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +5:9?&lH
*/ wjKc!iB
public void sort(int[] data) { ')WS :\J
int[] temp=new int[data.length]; n(Um/
mergeSort(data,temp,0,data.length-1); sr<\fW
} ZV-Yq !|t
$?OQtz@
private void mergeSort(int[] data, int[] temp, int l, int r) { h6:|RGF
int i, j, k; BGstf4v>A<
int mid = (l + r) / 2; P;IM -]
if (l == r) l5enlYH
return; k/Q8:qA
if ((mid - l) >= THRESHOLD) sv!6zJs
mergeSort(data, temp, l, mid); lvR>%I0`*
else zgxMDLH
insertSort(data, l, mid - l + 1); MiMDEe%f%
if ((r - mid) > THRESHOLD) Ud#xgs'
mergeSort(data, temp, mid + 1, r); 1b2xWzpG
else Xw162/:h
insertSort(data, mid + 1, r - mid); T9>,Mx%D[
4Ub7T=LG
for (i = l; i <= mid; i++) { raR=k!3i
temp = data; 7?uIl9Vk>(
} w:~vfdJ
for (j = 1; j <= r - mid; j++) { :?)q"hE
temp[r - j + 1] = data[j + mid]; H[?l)nZ}
} anH]]
int a = temp[l]; Zo Ra^o
int b = temp[r]; hXc:y0 0
for (i = l, j = r, k = l; k <= r; k++) { Bv7os3xb
if (a < b) { fz+dOIU3\L
data[k] = temp[i++]; )qDV3
a = temp; 6ziBGU#.-
} else { [E qZj/
data[k] = temp[j--]; H00iy$R
b = temp[j]; - G=doP0
} 7Ewq'Vu`y
} 7aHP;X~0
} )s ?Hkn
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/** ~#=70
* @param data Ece=loV*l
* @param l hz-^9U
* @param i U@LIw6B!KL
*/ 0.^67'
private void insertSort(int[] data, int start, int len) { J2!)%mF$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c <X( S
} [3v&j_
} OXV9D:bIa
} G~f|Sx
} 22EI`}"J
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堆排序： k!g%vx
ca'c5*Fs
package org.rut.util.algorithm.support; 6'.CW4L
e8)8QmB{o
import org.rut.util.algorithm.SortUtil; W: 3fLXk+
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/** o4YF,c+>q
* @author treeroot ]QF*\2b-I2
* @since 2006-2-2 VB=jKMi
* @version 1.0 8y]{I^z}
*/ Lv-M.
public class HeapSort implements SortUtil.Sort{ ~W_T3@
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/* (non-Javadoc) <,&t}7M/:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2bOFH6g
*/ J>+~//C
public void sort(int[] data) { zHXb[$Q
MaxHeap h=new MaxHeap(); v;Rm42k
h.init(data); A/~^4DR
for(int i=0;i h.remove(); oK2jPP
System.arraycopy(h.queue,1,data,0,data.length); 7fW$jiw
} 9lqD~H.
Y>CZ
private static class MaxHeap{ /)V8X#,
w(q\75
void init(int[] data){ 1HeE$
this.queue=new int[data.length+1]; JiX-t\V~
for(int i=0;i queue[++size]=data; q=26($
fixUp(size); U)_x(B3d/
} 3Zm;:v4y
} 88zK)k{
E>YE3-]
private int size=0; Nkk+*(Z
%p^`,b}
private int[] queue; .:Zb~
(l)r.Vj
public int get() { Jwbb>mB!
return queue[1]; *,Sa*-7(
} GO6uQ};
LC0g"{M
public void remove() { ]KQBek#DD
SortUtil.swap(queue,1,size--); ]fU0;jzX
fixDown(1); vk3C&!M<a
} Bv^5L>JZ/
file://fixdown .QDeS|l
private void fixDown(int k) { P5Pb2|\*
int j; R7Z!
while ((j = k << 1) <= size) { piAFxS<6
if (j < size %26amp;%26amp; queue[j] j++; v.>95|8
if (queue[k]>queue[j]) file://不用交换 [9~6, ;6
break; nOU.=N v`
SortUtil.swap(queue,j,k); WCg&*
k = j; Q&&oP:4~X*
} {BD G;e
} x,QXOh\a
private void fixUp(int k) { Jy-V\.N>s
while (k > 1) { 8LGNV&Edg
int j = k >> 1; OJ<V<=MYZ
if (queue[j]>queue[k]) l'Uj"9r,
break; {\n?IGP?wd
SortUtil.swap(queue,j,k); (CY#B%*
k = j; g 4lk
} p9~$}!ua
} dU|&- .rG
#9q ]jjH E
} <!PbD
p^ )iC&*0
} DP!~WkU~
2h`Tn{&1/
SortUtil： 'A'[N :i
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package org.rut.util.algorithm; qyR}|<F8*
J|DY /v
import org.rut.util.algorithm.support.BubbleSort; _kUtj(re
import org.rut.util.algorithm.support.HeapSort; nRheByYm
import org.rut.util.algorithm.support.ImprovedMergeSort; vFi+ExBU
import org.rut.util.algorithm.support.ImprovedQuickSort; 7K /quJ
import org.rut.util.algorithm.support.InsertSort; c{})Z=
import org.rut.util.algorithm.support.MergeSort; hfRxZ>O2
import org.rut.util.algorithm.support.QuickSort; 0!q@b
import org.rut.util.algorithm.support.SelectionSort; i: VMCNH
import org.rut.util.algorithm.support.ShellSort; e9rgJJ
6rN.)dL.#N
/** !5>PZ{J
* @author treeroot %G'P!xQhy
* @since 2006-2-2 ZO]P9b
* @version 1.0 ;~(yv|f6
*/ ]eo%eaA
public class SortUtil { >4nQ&b.u
public final static int INSERT = 1; B;J8^esypD
public final static int BUBBLE = 2; b}Xh|0`b+
public final static int SELECTION = 3; nc.:Wm6Mj
public final static int SHELL = 4; Z^#u n
public final static int QUICK = 5; T<o8lL
public final static int IMPROVED_QUICK = 6; 75H;6(7
public final static int MERGE = 7; I"HA( +G
public final static int IMPROVED_MERGE = 8; `"y:/F"{
public final static int HEAP = 9; N)
:rEZR`
public static void sort(int[] data) { E[c6*I
sort(data, IMPROVED_QUICK); g\G}b
} h<bCm`qj
private static String[] name={ 3% O[W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =!DpWVsQ
}; YGOhUT |
W@Rb"5Gy+
private static Sort[] impl=new Sort[]{ |F&02f!]@
new InsertSort(), #S"s8wdD
new BubbleSort(), /NQ PTr
new SelectionSort(), }z-6,i)'k
new ShellSort(), 0t6DD
new QuickSort(), ;e6-*
new ImprovedQuickSort(), a( SJ5t?-2
new MergeSort(), %\Mc6
new ImprovedMergeSort(), #hXxrN
new HeapSort() M# cJ&+rP
}; XCyrr2^
DY1"t7 9E
public static String toString(int algorithm){ h8icF}m
return name[algorithm-1]; =-/sB>-C
} qI*7ToBJ
r\FduyOXv
public static void sort(int[] data, int algorithm) { +6:jm54
impl[algorithm-1].sort(data); z[0tM&pv
} x@tI
~"r(PCa@
public static interface Sort { SZ~lCdWad
public void sort(int[] data); L+8O 4K{
} +g_m|LF
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public static void swap(int[] data, int i, int j) { rTim1<IXR
int temp = data; 2IXtIE
data = data[j]; n_kE
data[j] = temp; '1X^@]+6
} 6xx(o
} Wu'9ouw!