[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; %/kyT%1
} G;gJNK"e
int i1=l; 4 ;Qlu
int i2=mid+1; A5#y?Aq
for(int cur=l;cur<=r;cur++){ ]j>i.5
if(i1==mid+1) OEdJc\n_R
data[cur]=temp[i2++]; ujW1+Oj=~
else if(i2>r) fpM#XFj
data[cur]=temp[i1++]; o/[
else if(temp[i1] data[cur]=temp[i1++]; o6"*4P|
else *cWmS\h|
data[cur]=temp[i2++]; `Lyq[zg8
} xChI,~i
} F=G{)*Ih
j:5%ppIY
} ,1Qd\8N9
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改进后的归并排序: {5c]Mn"r
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package org.rut.util.algorithm.support; X7UBopm&
'#\D]5
import org.rut.util.algorithm.SortUtil; K|W^l\Lt
SM[{BH<
/** tXF]t
* @author treeroot (yQ 5`
* @since 2006-2-2 p]W+eT
* @version 1.0 3l!NG=R
*/ 4dH}g~[P9
public class ImprovedMergeSort implements SortUtil.Sort { 8OWmzY_=
$awi>#[
private static final int THRESHOLD = 10; 1;u4X`8
K0+;bu
/* yI:# |w|
* (non-Javadoc) Q/_[--0&#
* dAx96Og:X"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]pTvMom$6
*/ #i QX6WF
public void sort(int[] data) { crA:I"I
int[] temp=new int[data.length]; QhGXBM
mergeSort(data,temp,0,data.length-1); `ia %)@
} Bt^K]F\
&!7+Yb(1
private void mergeSort(int[] data, int[] temp, int l, int r) { <*'cf2Q$Av
int i, j, k; @%tXFizh
int mid = (l + r) / 2; q5&Ci`
if (l == r) OKuD"
return; HgJb4Fi
if ((mid - l) >= THRESHOLD) 'TN)Lb*
mergeSort(data, temp, l, mid); }|8*sk#[
else /<)-q-W;
insertSort(data, l, mid - l + 1); n1(?|aJ#1
if ((r - mid) > THRESHOLD) (VHND%7P
mergeSort(data, temp, mid + 1, r); ;##]G=%
else lXrD!1F
insertSort(data, mid + 1, r - mid); T!q_/[i~7
o|S)C<w
for (i = l; i <= mid; i++) { <MD;@_Nz\
temp = data; p(3sgY1
} NlR"$
for (j = 1; j <= r - mid; j++) { :x>T}C<Y
temp[r - j + 1] = data[j + mid]; v<rF'D2
} L0Vgo<A
int a = temp[l]; W|Ldu;#
int b = temp[r]; Iur9I>8h
for (i = l, j = r, k = l; k <= r; k++) { $&-5;4R'0
if (a < b) { ,^T]UHRO
data[k] = temp[i++]; $B\E.ml.
a = temp; |:iEfi]j
} else { ~P1_BD(
data[k] = temp[j--]; !oSLl.fQd
b = temp[j]; 4-4?IwS
} G^h_YjR`*
} /MMtTB H
} DMgBcP
a4GWuozl
/** dBEIMn@
* @param data MB$a82bY
* @param l a#(U2OP
* @param i =TcOnQj
*/ ki\uTD`mf
private void insertSort(int[] data, int start, int len) { 3l:QeZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B#N7qoi
} .Oo/y0E^
} i*tv,f.(
} 5rN_jC*U
} 2RNrIU I2
Ghv{'5w
堆排序： _\AUQ{
nsJ:Osq|
package org.rut.util.algorithm.support; ;x[pM_
")\aJ8
import org.rut.util.algorithm.SortUtil; W}gVIfe
lJ/6-dP
/** ~Yk"Hos
* @author treeroot +mWjBY
* @since 2006-2-2 *re 44
* @version 1.0 7c1+t_Ew
*/ 8GB]95JWwp
public class HeapSort implements SortUtil.Sort{ mY2:m(9"5
b :\D\X
/* (non-Javadoc) P.4E{.)(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g^lFML| %
*/ .j 'wQ+_
public void sort(int[] data) { w!,QxrOV~
MaxHeap h=new MaxHeap(); D$pj#
h.init(data); wa?+qiWnrl
for(int i=0;i h.remove(); ZJXqCo7O
System.arraycopy(h.queue,1,data,0,data.length); E2:D(7(;l
} qzdaN5
c cr" ep
private static class MaxHeap{ zGs|DB
z[#6-T &
void init(int[] data){ pcpxe&S
this.queue=new int[data.length+1]; kyAs'R@z
for(int i=0;i queue[++size]=data; `!Ln|_,d
fixUp(size); Y^eX@dEFR
} u~Lu<3v
} x`2pr
x70N8TQ_gK
private int size=0; wixD\t59X
rgR?wXW]jE
private int[] queue; elKx]%k*)
y9 uVCR
public int get() { i7v/A&Rc
return queue[1]; ~= 9Vv
} 02M7gBS
&t[|%c*D&
public void remove() { yV_ L/,6}D
SortUtil.swap(queue,1,size--); `1,eX)S
fixDown(1); HD|sr{Z%
} F?2FITi_V
file://fixdown qRUCnCZs
private void fixDown(int k) { 'wE\{1~_[+
int j; ]L]T>~X`
while ((j = k << 1) <= size) { |>JmS
if (j < size %26amp;%26amp; queue[j] j++; 24|<<Xn
if (queue[k]>queue[j]) file://不用交换 ;$6x=uZ
break; 5`yPT>*#m>
SortUtil.swap(queue,j,k); d<Dn9,G
k = j; Lw*1 .~
} {{zua-F
} r`>~Lp`
private void fixUp(int k) { J[+Tj@n'
while (k > 1) { TAAR'Jz S
int j = k >> 1; >C^/,/%v
if (queue[j]>queue[k]) 0# UAjT3
break; [Yoa"K
SortUtil.swap(queue,j,k); 3GINv3_
k = j; |0DP} `~
} pP oxVvG{
} e5qvyUJM
Xa*?<(^`
} 'Aet{A=9
,*w>z
} Jmy)J!ib*
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SortUtil： V%o#AfMI_
m`a>,%}P"
package org.rut.util.algorithm; j,ZW[*M
9dw0<qw1%
import org.rut.util.algorithm.support.BubbleSort; ?:JdRnH\
import org.rut.util.algorithm.support.HeapSort; jqqaw
import org.rut.util.algorithm.support.ImprovedMergeSort; jQ^Yj"6
import org.rut.util.algorithm.support.ImprovedQuickSort; :%>oe> _"
import org.rut.util.algorithm.support.InsertSort; yI *M[0
import org.rut.util.algorithm.support.MergeSort; , Z4p0M
import org.rut.util.algorithm.support.QuickSort; !r2}59J
import org.rut.util.algorithm.support.SelectionSort; =_pmy>_z
import org.rut.util.algorithm.support.ShellSort; .Wh6(LDY(
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/** dc)wu]
* @author treeroot J;"nm3[.q
* @since 2006-2-2 \|Y{jG<cu
* @version 1.0 +E)e1:8
*/ {;;eOxOP|
public class SortUtil { \hu':@}
public final static int INSERT = 1; 8}J(c=4Gk
public final static int BUBBLE = 2; .8%vd
public final static int SELECTION = 3; d^_itC;-,
public final static int SHELL = 4; f0g6g!&gf
public final static int QUICK = 5; =X<)5IS3
public final static int IMPROVED_QUICK = 6; xz="|HD);
public final static int MERGE = 7; BMe72
public final static int IMPROVED_MERGE = 8; h#;?9DP
public final static int HEAP = 9; [I_BCf
a\Tr!Be,
public static void sort(int[] data) { bL#sn_(m
sort(data, IMPROVED_QUICK); J;7s/YH^
} m_~y
private static String[] name={ 9PWm@ Nlf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u`nt\OF
}; '|J)ds
,%.:g65%
private static Sort[] impl=new Sort[]{ d7\k gh
new InsertSort(), !HbqbS22
new BubbleSort(), 37,L**Dgs
new SelectionSort(), C!`>cUhE{
new ShellSort(), c;nx59w]q
new QuickSort(), EGr|BLl
new ImprovedQuickSort(), i<0D Z_rub
new MergeSort(), o<~-k,{5P
new ImprovedMergeSort(), m*OLoZVy
new HeapSort() "@aq@mY@
}; 55(J&q
WNl&v]
public static String toString(int algorithm){ Ae3,W
return name[algorithm-1]; Am]2@ESUP
} VoWA tNU
G!-7ic_4
public static void sort(int[] data, int algorithm) { Hs.6;|0%
impl[algorithm-1].sort(data); r=xTs,xx
} ZKZl>dDuh
Bi$ 0{V Z8
public static interface Sort { )Fw @afE~
public void sort(int[] data); Dg1kbO=2
} :Xh_$4~^Y
SxnIX/]J
public static void swap(int[] data, int i, int j) { =I %g;YK
int temp = data; z0=Rp0_W
data = data[j]; rwasH,+
data[j] = temp; Sa(yjF1
} z%++\.g_
} #_JA5W+E