[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; NLJD}{8Ot
} n7vLw7
int i1=l; lPS A
int i2=mid+1; @"}dbW<DV
for(int cur=l;cur<=r;cur++){ t[6g9e$
if(i1==mid+1) ;+-$=l3[a
data[cur]=temp[i2++]; dt"[5;_P`
else if(i2>r) VA _O0y2
data[cur]=temp[i1++]; 5L<}u`0J
else if(temp[i1] data[cur]=temp[i1++]; ?=<vC
else }P$48o VY
data[cur]=temp[i2++]; uP/WRQ{rW>
} jl<rxO?-F
} Rk PY@>
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} &)vX7*j
xDBEs*
改进后的归并排序: F<?e79},`
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package org.rut.util.algorithm.support; %iI0JF*Ez
=+{.I,g}g@
import org.rut.util.algorithm.SortUtil; ,q#^_/?
oHmU|
/** ^zGgvFf>
* @author treeroot 's$pr#V
* @since 2006-2-2 do{#y*B/g!
* @version 1.0 ->}K-n ),
*/ E{r_CR+8
public class ImprovedMergeSort implements SortUtil.Sort { ,{c9Lv%@J
p5C sw5
private static final int THRESHOLD = 10; 2 G_*Pqc
1vu4}%nD
/* vi0% jsI
* (non-Javadoc) K0]'v>AWr
* vjJ!d#8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (0W%YZ!&
*/ kq:,}fc;B
public void sort(int[] data) { tGzYO/Zp
int[] temp=new int[data.length]; "zw?AC6
mergeSort(data,temp,0,data.length-1); #hd<5+$U}l
} Fm-W@
N|Ua|^
private void mergeSort(int[] data, int[] temp, int l, int r) { xP'IyABx
int i, j, k; ,I=ClmR
int mid = (l + r) / 2; )+ Wr- Yay
if (l == r) 1l\O9D +$
return; nl5K1!1
if ((mid - l) >= THRESHOLD) yQhrPw> m
mergeSort(data, temp, l, mid); _dsd{&
else OP2!lEs
insertSort(data, l, mid - l + 1); HtEjM|zj
if ((r - mid) > THRESHOLD) `+B+RQl}[
mergeSort(data, temp, mid + 1, r); |i?AtOt@f
else X>%2\S
insertSort(data, mid + 1, r - mid); \9se~tAl3
uA!T@>vl
for (i = l; i <= mid; i++) { 8t}=?:B+{
temp = data; l$,l3
} g,y`[dr
for (j = 1; j <= r - mid; j++) { 2WE
temp[r - j + 1] = data[j + mid]; UXQ{J5Ox+
} NFLmM
int a = temp[l]; Cqg}dXn'
int b = temp[r]; {,APZ`q|
for (i = l, j = r, k = l; k <= r; k++) { h,140pW
if (a < b) { a4`@z:l
data[k] = temp[i++]; 8ZG'?A+{
a = temp; dN |w;|M
} else { .[2MPjg
data[k] = temp[j--]; .j}u'!LKul
b = temp[j]; 2z0HB+Y}x
} 9d[0i#`:q
} ;xB"D0~,1
} aGpRdF1;!
Fa+PN9M`?.
/** p6Z]oL q
* @param data :-"J)^V
* @param l o4~ft!>
* @param i sgX}`JH?z
*/ g=U?{<8.m
private void insertSort(int[] data, int start, int len) { 6{7O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cWRB=`=qz
} ( ?/0$DB
} GV[%P
} y'@l,MN{
} uqQMS&;+,|
$}KYpSV
堆排序： :>3&"T.
`=KrV#/758
package org.rut.util.algorithm.support; 0a'@J~v!
A\#?rK
import org.rut.util.algorithm.SortUtil; KFfwZkj{
4l$8lYi
/** \clWrK
* @author treeroot |@ldXuYb
* @since 2006-2-2 2~`dV_
* @version 1.0 YD+C1*c!
*/ u-K5
public class HeapSort implements SortUtil.Sort{ WX=+\`NyJ(
{VNeh
/* (non-Javadoc) ?x[>g!r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n9J>yud|
*/ 4xYo2X,B
public void sort(int[] data) { ;<][upn
MaxHeap h=new MaxHeap(); &qpA<F@7
h.init(data); ttKfZ0
for(int i=0;i h.remove(); }>1E,3A:%G
System.arraycopy(h.queue,1,data,0,data.length); 4[-9$ r
} 6h,'#|:d
3PEs$m9e
private static class MaxHeap{ y]+A7|
U^YPL,m1
void init(int[] data){ |kd^]!_
this.queue=new int[data.length+1]; kL3=7t^ 1
for(int i=0;i queue[++size]=data; .o8Gi*PEY
fixUp(size); A+l"
} Lf:Z (Z>
} Uy_=#&jg
gJ7$G3&oZg
private int size=0; 950b9Vn&
GkC88l9z
private int[] queue; S-H3UND"
z[rB/|2
public int get() { o99 a=x6
return queue[1]; *o#`lH
} i,HAXPi
[y:LA~q
public void remove() { pZjFpd|
SortUtil.swap(queue,1,size--); i*tj@5MY-
fixDown(1); ] QEw\4M?=
} 'YeJGzsJp
file://fixdown 3/e !7
private void fixDown(int k) { 5 9vGLN!L
int j; ?.s*)n
while ((j = k << 1) <= size) { [Wh 43Z
if (j < size %26amp;%26amp; queue[j] j++; 2P=;r:cx
if (queue[k]>queue[j]) file://不用交换 ;:4puv+]
break; >xjy P!bca
SortUtil.swap(queue,j,k); 9T1G/0k-
k = j; 4Uiqi{}
} ]VME`]t`
} fjFy$NX&>
private void fixUp(int k) { hTm}j,H
while (k > 1) { Xy{+=UY
int j = k >> 1; ;GAYcVB
if (queue[j]>queue[k]) q|l|gY1g)
break; :]s] =q&]
SortUtil.swap(queue,j,k); UQ)}i7v
k = j; cOQy|v`KD,
} S(6ZX>wv:
} z#4g,)ZX
>g&`g}xZQ
} -eMRxa>
bv/b<N@4?$
} 1%,Z&@^j
W<Lrfo&=Y]
SortUtil： tp<VOUa
jGn^<T\
package org.rut.util.algorithm; 2#3R]zIO
y`\Mhnj
import org.rut.util.algorithm.support.BubbleSort; :!$z1u8R
import org.rut.util.algorithm.support.HeapSort; ">3@<f>
import org.rut.util.algorithm.support.ImprovedMergeSort; +0Gep}&z.
import org.rut.util.algorithm.support.ImprovedQuickSort; Kcl$|T
import org.rut.util.algorithm.support.InsertSort; TXcKuo=
import org.rut.util.algorithm.support.MergeSort; l'QR2r7&.
import org.rut.util.algorithm.support.QuickSort; TeJ `sJ
import org.rut.util.algorithm.support.SelectionSort; iC]lO
import org.rut.util.algorithm.support.ShellSort; w>uZ$/
Ao T7sy7
/** L])w-
* @author treeroot jhv1 D'>6
* @since 2006-2-2 cqx1NWlY
* @version 1.0 }=a4uCE
*/ `Ny8u")=
public class SortUtil { 1 1CJT
public final static int INSERT = 1; s?k[_|)!
public final static int BUBBLE = 2; "44?n <1
public final static int SELECTION = 3; jm\#($gl=
public final static int SHELL = 4; #Uh5tc
public final static int QUICK = 5; "ux]kfoT
public final static int IMPROVED_QUICK = 6; AvZ)1(
public final static int MERGE = 7; moR2iyO_
public final static int IMPROVED_MERGE = 8; RWFf-VA?
public final static int HEAP = 9; e6lOmgHn5
2<Bv=B
public static void sort(int[] data) { vLv@Mo
sort(data, IMPROVED_QUICK); on?/tHys
} CDnz &?
private static String[] name={ /T[ICd2J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~uadivli
}; S7{.liHf
% VpBB
private static Sort[] impl=new Sort[]{ nM-SDVFM
new InsertSort(), CqK#O'\
new BubbleSort(), {yMA7W7]
new SelectionSort(), v`^J3A
new ShellSort(), UUu-(H-J
new QuickSort(), *`Xx_
new ImprovedQuickSort(), t<F]%8S
new MergeSort(), #J724`
new ImprovedMergeSort(), ^G&D4uZ
new HeapSort() x}'4^Cv
}; :xS&Y\ry
siYRRr
public static String toString(int algorithm){ Y>Hl0$:=
return name[algorithm-1]; uhB!k-ir
} orH0M!OtS!
ApYud?0b
public static void sort(int[] data, int algorithm) { x ;,xd
impl[algorithm-1].sort(data); FLI8r:
} p''"E$B/(
F'FZ?*a
public static interface Sort { x9"4vp
public void sort(int[] data); Qk.Q9@3W
} puN=OX}C
M5WtGIV
public static void swap(int[] data, int i, int j) { /1~|jmi(
int temp = data; 'QojSq
data = data[j]; e>9Z:vY
data[j] = temp; Yc`j
} )kKmgtj
} o Xi}@