[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; TT no
} kE:{#>[Uz
int i1=l; ' &3,qT
int i2=mid+1; wD:2sri
for(int cur=l;cur<=r;cur++){ :cf#Tpq"
if(i1==mid+1) K) Ums-b
data[cur]=temp[i2++]; !L@<?0xLW
else if(i2>r) Bg] %
data[cur]=temp[i1++]; Ylyk/
else if(temp[i1] data[cur]=temp[i1++]; gZiwXb
else X:lStO#5
data[cur]=temp[i2++]; Y^nm{;G+
} /=T:W*C
} 7xFZJ#
lwz\"8
} 7%W1M@
;!C_}P
改进后的归并排序: +&dkJ 4g[
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package org.rut.util.algorithm.support; O~v~s 'c&
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import org.rut.util.algorithm.SortUtil; vvu $8n
M ziOpraj
/** Wffz&pR8
* @author treeroot &E1m{gB(
* @since 2006-2-2 Y;'SD{On
* @version 1.0 xI.0m
*/ ~4|Trz2T
public class ImprovedMergeSort implements SortUtil.Sort { 'c_K[p$
5fMlOP_
private static final int THRESHOLD = 10; nW} s
xQ2:tY#?
/* CB X}_]9X
* (non-Javadoc) )\j dF-s
* !!ma]pB,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g~$UU(HX
*/ `/?'^A%Ik
public void sort(int[] data) { f$tm<:)Y
int[] temp=new int[data.length]; T:Ovh.$
mergeSort(data,temp,0,data.length-1); 7>f"4r_r6<
} u:f.;?
awI{%u_(nA
private void mergeSort(int[] data, int[] temp, int l, int r) { CUHT5J*sY
int i, j, k; "Zx<hL*
int mid = (l + r) / 2; nt+OaXe5D
if (l == r) ~A1!!rJX
return; m=+x9gL2
if ((mid - l) >= THRESHOLD) 3<xDxj0<
mergeSort(data, temp, l, mid); >x3lA0m
else B^]PKjLNZ
insertSort(data, l, mid - l + 1); IibYGF
if ((r - mid) > THRESHOLD) H cyoNY
mergeSort(data, temp, mid + 1, r); [qC0YM
else Nd+1r|e'
insertSort(data, mid + 1, r - mid); GKjtX?~1
u>G9r#~`k
for (i = l; i <= mid; i++) { 9zS
temp = data; x(xi%?G
} `R>z{-@=
for (j = 1; j <= r - mid; j++) { KQvSeH>r
temp[r - j + 1] = data[j + mid]; ~**x_ v
} .Zj`_5C
int a = temp[l]; C\aHr!
int b = temp[r]; vf$IF|
for (i = l, j = r, k = l; k <= r; k++) { +iFt)
if (a < b) { | oK9o6m4
data[k] = temp[i++]; Aq*?Q/pV
a = temp; :enR8MS
} else { @K+gh#
data[k] = temp[j--]; uo J0wG.
b = temp[j]; f$6N
} h6OQeZ.
} ]@ke_' "
} wpN3-D
fISK3t/=C
/** _ilitwRN3
* @param data UAT\ .
* @param l 9cUa@;*1
* @param i $A-X3d;'\/
*/ biU_ImJ>0
private void insertSort(int[] data, int start, int len) { |Tc4a4jS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zL9~gJ
} $+_1F`
} fK+ 5
} pjX=:K|
} Eu:/U*j
C}pm>(F~
堆排序： <R;wa@a>
gwQMy$
package org.rut.util.algorithm.support; _@!vF,Wcf
-{k8^o7$
import org.rut.util.algorithm.SortUtil; y.J>}[\&x
}8#Ed;%K
/** bT&{8a
* @author treeroot u~j H
* @since 2006-2-2 R:YVmqd
* @version 1.0 FZ?eX`,
*/ BZHoRd{EH
public class HeapSort implements SortUtil.Sort{ ]W14'Z
i9XpP(mf
/* (non-Javadoc) Q,^/Lm|]k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t@9-LYbL
*/ V){Io_"
public void sort(int[] data) { r6'dEa
MaxHeap h=new MaxHeap(); _1qR1<V
h.init(data); 3MFTP5~
for(int i=0;i h.remove(); p\&/m
System.arraycopy(h.queue,1,data,0,data.length); !?0C(VL(:
} ;'8Wl
N+B!AK0.
private static class MaxHeap{ HXSryjF?
"q+Z*
void init(int[] data){ g.@[mf0r
this.queue=new int[data.length+1]; `dG;SM$T,
for(int i=0;i queue[++size]=data; #gO[di0WhC
fixUp(size); c/A?-9
} 05T?c{ ;
} i79$D:PcLa
h!%y,4IBR
private int size=0; m2jts(stp
6bhb_U'f
private int[] queue; R|M]mwa^w
n}IGxum8`
public int get() { xZ P SUEG
return queue[1]; qb=2J5su
} &BrFcXF
; Z7!BU
public void remove() { h7q{i|5
SortUtil.swap(queue,1,size--); 5rB>)p05[
fixDown(1); 4RB%r
} gM>?w{!LBx
file://fixdown '~K]=JP
private void fixDown(int k) { {qi#
int j; _7Y-gy#\a
while ((j = k << 1) <= size) { =3QhGFd
if (j < size %26amp;%26amp; queue[j] j++; (b//YyqN
if (queue[k]>queue[j]) file://不用交换 >pLJ ,Z
break; FEu"b@v
SortUtil.swap(queue,j,k); SfC* ZM}<
k = j; ||QK)$"
} O}Pqbx&
} cMZy~>
private void fixUp(int k) { 2SC-c `9)
while (k > 1) { M.t,o\xl
int j = k >> 1; h`\$8oV
if (queue[j]>queue[k]) UHvA43
break; lWj*tnnn[
SortUtil.swap(queue,j,k); 7)jN:+4N
k = j; 6[k<&;
} ~SBb2*ID
} u1M8nb
9;p5z[jI
} mI,lW|/l,
S,6/X.QBv
} zgEN2d
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SortUtil： 7`J2/(
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package org.rut.util.algorithm; )~=8Ssu
~nU9j"$
import org.rut.util.algorithm.support.BubbleSort; -o%? ]S
import org.rut.util.algorithm.support.HeapSort; r YKGX?y
import org.rut.util.algorithm.support.ImprovedMergeSort; n]$rLm%^
import org.rut.util.algorithm.support.ImprovedQuickSort; VtI`Qcjc
import org.rut.util.algorithm.support.InsertSort; [(x*!,=
import org.rut.util.algorithm.support.MergeSort; 4h|*r !
import org.rut.util.algorithm.support.QuickSort; g]: [^p
import org.rut.util.algorithm.support.SelectionSort; 0j(U &
import org.rut.util.algorithm.support.ShellSort; cWx`y><
y*+8Z&i.:
/** VqW5VLa
* @author treeroot ">.k 6Q
* @since 2006-2-2 :Q=y'<
* @version 1.0 SgewAng?@o
*/ .(q'7Q Z/
public class SortUtil { dV38-IfGkl
public final static int INSERT = 1; "[?DS
public final static int BUBBLE = 2; AJEbiP
public final static int SELECTION = 3; igA?E56?
public final static int SHELL = 4; $rcv@-l
public final static int QUICK = 5; T.;{f{
public final static int IMPROVED_QUICK = 6; F><_gIT
public final static int MERGE = 7; UMRFTwY
public final static int IMPROVED_MERGE = 8; lL:!d.{
public final static int HEAP = 9; 4E5;wH
M{G}-QK_.
public static void sort(int[] data) { NJsaTBT
sort(data, IMPROVED_QUICK); U&BCd$
} KLW5Ad:/rI
private static String[] name={ T(x@gwc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L5x;#\#p
}; WyatHC
E8r6P:5d`
private static Sort[] impl=new Sort[]{ N Nk
new InsertSort(), "NA<^2W@J
new BubbleSort(), XyN " Jr
new SelectionSort(), $+GDPYm'
new ShellSort(), u*2?Gky
new QuickSort(), zO"De~[9
new ImprovedQuickSort(), S:j{R^$k
new MergeSort(), %P s.r{%{
new ImprovedMergeSort(), C @<T(`o
new HeapSort() r'{N_|:vv
}; v; i4ZSV^A
xA7~"q&u
public static String toString(int algorithm){ tcXXo&ZS
return name[algorithm-1]; MF<ZB_@
} ]?1_.Wjtt
^PNDxtd|v
public static void sort(int[] data, int algorithm) { k5aB|xo
impl[algorithm-1].sort(data); ]>(pj9)
} J";N^OR{A%
Gl'G;F$Y-
public static interface Sort { W/BPf{U
public void sort(int[] data); @!dIa1Q"
} * rlVE
=9ff983
public static void swap(int[] data, int i, int j) { 4xg)e` *U
int temp = data; e7"T37
data = data[j]; X$6NJ(2G
data[j] = temp; 2T+-[}*
} e,}h^^"
} `OMX 9i