[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; x"g-okLN
} BdWRm=
int i1=l; ~nit~;
int i2=mid+1; `As|MYv
for(int cur=l;cur<=r;cur++){ D$X9xtT
if(i1==mid+1) :LE0_ .
data[cur]=temp[i2++]; lKVy{X3]*
else if(i2>r) s*'L^>iZ
data[cur]=temp[i1++]; ~kDR9s7
else if(temp[i1] data[cur]=temp[i1++]; |gXtP-
else E lf'1
data[cur]=temp[i2++]; +IS+!K0?)
} )-qWcf?
} oZM6%-@qi
-Iq W@|N
} ~bm VpoI
jM<=>P
改进后的归并排序: /"~ D(bw0=
PK&3nXF%4
package org.rut.util.algorithm.support; C\-Abqc
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import org.rut.util.algorithm.SortUtil; L >* F8|g
+SM&_b
/** M't~/&D#
* @author treeroot |X}H&wBWo
* @since 2006-2-2 l'yX_`*Iq
* @version 1.0 :+ASZE.
*/ ^pI&f{q
public class ImprovedMergeSort implements SortUtil.Sort { v?AQ&'Fk
@B.;V=8wJ
private static final int THRESHOLD = 10; qcN{p7=0
^oZz,q
/* s,5SWdb\v
* (non-Javadoc) gK&MdF*
* FI.Ae/(U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z>897>
*/ ` u|8WK:
public void sort(int[] data) { CsJ38]=Mt
int[] temp=new int[data.length]; 6CQ.>M:R
mergeSort(data,temp,0,data.length-1); $5(_U
} -|1H-[Y(
2/*F}w/
private void mergeSort(int[] data, int[] temp, int l, int r) { |6qxRWT"
int i, j, k; I JPpF`
int mid = (l + r) / 2; =O~ J
if (l == r) sObH#/l`
return; M lv
if ((mid - l) >= THRESHOLD) KOQiX?'
mergeSort(data, temp, l, mid); 1\'?.
else R1!F mZW8
insertSort(data, l, mid - l + 1); C]X:@^Hy
if ((r - mid) > THRESHOLD) ^A&i$RRO
mergeSort(data, temp, mid + 1, r); jwP}{mi*
else ;q=0NtCS=4
insertSort(data, mid + 1, r - mid); ^[UWG^d
$q"/q*ys
for (i = l; i <= mid; i++) { B #[URZ9S
temp = data; ~RdD6V
} |3Fo4K%+
for (j = 1; j <= r - mid; j++) { Mz?xvP?z
temp[r - j + 1] = data[j + mid]; fG *1A\t]
} P4\{be>e
int a = temp[l]; "PFczoRZ
int b = temp[r]; E?VPCx
for (i = l, j = r, k = l; k <= r; k++) { | c:E)S\
if (a < b) { R04%;p:k#
data[k] = temp[i++]; k!&G;6O-
a = temp; |igr3p5Fw
} else { PIZnzZ@Z;
data[k] = temp[j--]; bCV3h3<
b = temp[j]; TO(2n8'fdO
} MC 8t"SB
} 5} v(Ks>
} 'ycr/E&m{
dkHye>
/** ?&ow:OH+
* @param data (31ia"i%
* @param l c `[,>
* @param i V6c>1nZ
*/ a{4Wg:
private void insertSort(int[] data, int start, int len) { 9s#Q[\B!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^#6"d+lp
} AZj`o
} d9j+==S <
} J|O=w(
} -\6";_Y
|UudP?E
堆排序： O#}d!}SIp
[N35.O6P6u
package org.rut.util.algorithm.support; 5s5GBJ?
5l(8{,NDt
import org.rut.util.algorithm.SortUtil; AQUl:0!
"8.to=Lx
/** _f"HUKGN
* @author treeroot P#8+GN+bF
* @since 2006-2-2 aEO``W
* @version 1.0 QNN*/n
*/ 3?}\Hw
public class HeapSort implements SortUtil.Sort{ ?g~w6|U(r
v$WH#;(\
/* (non-Javadoc) 8\AyKw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %OV)O-
*/ jX9{Ki"
public void sort(int[] data) { g9T9TQ-O
MaxHeap h=new MaxHeap(); +#B4Z'nT
h.init(data); 1X ?9Ji)h
for(int i=0;i h.remove(); m'!smSx8
System.arraycopy(h.queue,1,data,0,data.length); *mvDh9v
} cC4 2b2+
GlVb|O"
private static class MaxHeap{ /LH# 3
@Sik~Mm_h
void init(int[] data){ y ~PW_,
this.queue=new int[data.length+1]; 3d1$w
for(int i=0;i queue[++size]=data; =do*(
fixUp(size); HsF8$C$z
} !R b
} ~x(1g;!^
p aQ"[w
private int size=0; b}f#[* Z
j O-H1@;
private int[] queue; J~e%EjN5e
/'[m6zm]
public int get() { w[K!m.p,u
return queue[1]; C;m,{MD
} 9<" .1
(t.OqgY
public void remove() { 2\b 2W_
SortUtil.swap(queue,1,size--); x;F^7c1
fixDown(1); B#A .-nb
} ?Nbc#0pb7
file://fixdown >~%EB?8
private void fixDown(int k) { Y ,
int j; 1#Ls4+]5
while ((j = k << 1) <= size) { 03%`ouf
if (j < size %26amp;%26amp; queue[j] j++; 7])cu>/
if (queue[k]>queue[j]) file://不用交换 J2KULXF
break; Lddk:u&J
SortUtil.swap(queue,j,k); -&7\do<
k = j; t+H=%{z
} \{GBaMwG~
} vMlT
private void fixUp(int k) { g?9IS,Gp
while (k > 1) { .`ND
int j = k >> 1; QE#Ar8tU
if (queue[j]>queue[k]) +WH|nV~lQ
break; #W]4aZ1
SortUtil.swap(queue,j,k); #A:+|{H"
k = j; ]N& Y25oT5
} #GlQwk3
} e@`"V,i
ZCcKY6b
} sOf;I]E|
1DTA Dh0
} id"-eMwp
w,s++bV;L
SortUtil： +L]$M)*0&
TV['"'D&i
package org.rut.util.algorithm; @[2Go}VF
QAk.~ob
import org.rut.util.algorithm.support.BubbleSort; p`PBPlUn
import org.rut.util.algorithm.support.HeapSort; 6Hh\ys
import org.rut.util.algorithm.support.ImprovedMergeSort; R.Uwf
import org.rut.util.algorithm.support.ImprovedQuickSort; Q4[^JQsR2
import org.rut.util.algorithm.support.InsertSort; Y30T>5
import org.rut.util.algorithm.support.MergeSort; #+Pk_?
import org.rut.util.algorithm.support.QuickSort; O} &%R:
import org.rut.util.algorithm.support.SelectionSort; eM) I%
import org.rut.util.algorithm.support.ShellSort; v90)G8|q
C&1()U
/** }JWLm.e
* @author treeroot %x]8^vze
* @since 2006-2-2 h{5K9$9=
* @version 1.0 h,!#YG@>
*/ f6*6*=
public class SortUtil { 1FPt%{s3
public final static int INSERT = 1; C||9u}Q<
public final static int BUBBLE = 2; Hf#VW^
public final static int SELECTION = 3; 6F)^8s02h
public final static int SHELL = 4; $GI jWlAh
public final static int QUICK = 5; Pw:{
public final static int IMPROVED_QUICK = 6; g,YJh(|#{
public final static int MERGE = 7; T`7HQf ;
public final static int IMPROVED_MERGE = 8; oRALhaI
public final static int HEAP = 9; 70MSP;^
?6#F9\
public static void sort(int[] data) { ~CRd0T[^
sort(data, IMPROVED_QUICK); PL}c1Ud
} W74Y.zQ
private static String[] name={ }}Kjb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P\nz;}nv
}; h;lg^zlTb
"{@Q..hxC
private static Sort[] impl=new Sort[]{ ) u(Gf*t
new InsertSort(), 5L!cS+QNU
new BubbleSort(), nl\l7/}6
new SelectionSort(), je[1>\3W
new ShellSort(), e*Gt%'
new QuickSort(), GI ;
new ImprovedQuickSort(), xis],.N
new MergeSort(), AY B~{
new ImprovedMergeSort(), /E32^o|,>
new HeapSort() *%#Sa~iPo
}; $-Yq?:
q-lejVS(g
public static String toString(int algorithm){ ?r}'0dW
return name[algorithm-1]; Ob~7r*q
} bZKlQ<sI
6]D%|R,Q#}
public static void sort(int[] data, int algorithm) { h@H8oZ[
impl[algorithm-1].sort(data); IHs^t/;Iv
} |ler\"Eu
f7y3BWOi]
public static interface Sort { @L/p
public void sort(int[] data); brpsZU
} ;&2f{
&$V&gAN
public static void swap(int[] data, int i, int j) { ;J&p17~T9
int temp = data; #=81`u
data = data[j]; EG&97lb
data[j] = temp; )/{zTg8$?/
} =U- w!uW
} zcrM3`Zh