[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; KPki}'GO
} unxqkU/<Z
int i1=l; ]$hBMuUa
int i2=mid+1; $cgcX
for(int cur=l;cur<=r;cur++){ Hr C+Yjp
if(i1==mid+1) xz]~ jL@-]
data[cur]=temp[i2++]; a'T;x`b8U,
else if(i2>r) dr"1s-D4IQ
data[cur]=temp[i1++]; x1a:u
else if(temp[i1] data[cur]=temp[i1++]; fQFk+C
else <3 uNl
data[cur]=temp[i2++]; '%;m?t%q
} Dp:BU|r
} vQ.R{!",>
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} gM]:Ma
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改进后的归并排序: Gm`8q}<I
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package org.rut.util.algorithm.support; k3|Z7eW}[
^z\cyT%7t
import org.rut.util.algorithm.SortUtil; +T+#q@
OTv)
/** $;PMkUE
* @author treeroot \<K5ZIWV
* @since 2006-2-2 zm# ?W
* @version 1.0 iow"n$/
*/ `0svy}
public class ImprovedMergeSort implements SortUtil.Sort { /kG_*>.Z
/_.|E]
private static final int THRESHOLD = 10; ->jDb/a{C
p4QU9DF
/* s#MPX3itK
* (non-Javadoc) YYS0`
* O0:q;<>z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dWW.Y*339
*/ |[lKY+26:{
public void sort(int[] data) { AFn7uW!9Gw
int[] temp=new int[data.length]; HKeK<V
mergeSort(data,temp,0,data.length-1); BLFdHB.$T
} =|9!vzG4
I 6O
private void mergeSort(int[] data, int[] temp, int l, int r) { bMBLXk
int i, j, k; d'ifLQ\
int mid = (l + r) / 2; 1H9!5=Ff
if (l == r) z!\*Y =e
return; r|Z{-*`
if ((mid - l) >= THRESHOLD) /V By^L:
mergeSort(data, temp, l, mid); ABkl%m6xf
else "jCu6Rjd
insertSort(data, l, mid - l + 1); _dg\\c
if ((r - mid) > THRESHOLD) WzWXE(
mergeSort(data, temp, mid + 1, r); U!]dEW|G
else 0"#HJA44
insertSort(data, mid + 1, r - mid); .]Z"C&"N]
|?9HU~B
for (i = l; i <= mid; i++) { L.IlBjD
temp = data; ! P4*+')M
} 2zpr~cB=
for (j = 1; j <= r - mid; j++) { DwF hK*
temp[r - j + 1] = data[j + mid]; @|!z9Y*
} Z:gyz$9w
int a = temp[l]; Va8&Z
int b = temp[r]; JS77M-Ac
for (i = l, j = r, k = l; k <= r; k++) { 6C)_
if (a < b) { xD$\,{
data[k] = temp[i++]; .C(tMF]D,
a = temp; 8Y?;x}
} else { X?Au/
data[k] = temp[j--]; 'q.!|G2U
b = temp[j]; B<-Wea
} (.,G=\!
} Ca\6vR
} ,?3G;-
z{>Rc"%\
/** GthYzd:'hJ
* @param data Ho%CDz z
* @param l Gh$^{
* @param i I:.s_8mH}
*/ %znc##j)q
private void insertSort(int[] data, int start, int len) { v,t:+ !8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g&.=2uP
} ]f3>-)$*
} PW4q~rc=:
} ntY]SK%Z
} |hQ;l|SWg
aDCwI:Li(
堆排序： v>56~AJ
1eKT^bgM
package org.rut.util.algorithm.support; 4\i[m:e=@
/O9EQPm(
import org.rut.util.algorithm.SortUtil; KmF]\:sMD
E.f%H(b
/** Ep}s}Stlr}
* @author treeroot uw7zWJ n
* @since 2006-2-2 tVjsRnb{
* @version 1.0 M(fTKs
*/ s@C}P
public class HeapSort implements SortUtil.Sort{ =Sv/IXX\di
YK\X+"lB
/* (non-Javadoc) ])!*_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /(LL3cZK
*/ `x|?&Ytmf9
public void sort(int[] data) { p#Bi>/C6
MaxHeap h=new MaxHeap(); Z]ONh
h.init(data); <}LC~B!
for(int i=0;i h.remove(); ;PH~<T
System.arraycopy(h.queue,1,data,0,data.length); #1[u(<AS
} =QsYXK7Mn4
=T_g}pu
private static class MaxHeap{ a9G8q>h]O
4m)n+ll
void init(int[] data){ [gB+C84%%
this.queue=new int[data.length+1]; F\! `/4
for(int i=0;i queue[++size]=data; {8aTV}Ha2
fixUp(size); B1STGL`nK
} ix$bRdl
} _j3fAr(V
|{8Pb3#U
private int size=0; 626r^c=
{8OCXus3m
private int[] queue; |^aKs#va
kP"9&R`E
public int get() { yjAL\U7`T
return queue[1]; l,8##7
} MPV5P^@X
A's{j7
public void remove() { g){<y~Mk
SortUtil.swap(queue,1,size--); RZ7@cQY
fixDown(1); ys~x$
} 6 r"<jh#
file://fixdown ise-O1'
private void fixDown(int k) { "fI6Cpc
int j; '%D7C=;^
while ((j = k << 1) <= size) { c:0L+OF}xY
if (j < size %26amp;%26amp; queue[j] j++; _LPHPj^Pg
if (queue[k]>queue[j]) file://不用交换 w@b)g
break; (?c-iKGc
SortUtil.swap(queue,j,k); pGZ8F
k = j; G9lUxmS<
} 7"mc+QOp
} Zh,71Umz
private void fixUp(int k) { g ?k=^C
while (k > 1) { IU[ [H#
int j = k >> 1; #jk_5W
if (queue[j]>queue[k]) >bxS3FCX
break; `g,..Ns-r
SortUtil.swap(queue,j,k); NgwbQ7)
k = j; [~ fraK,)
} R@0R`Zs
} p[-O( 3Y
Jvi#)
} rZF*q2?
:t[_:3@
} KP"+e:a%
Rv=YFo[B
SortUtil： Vj-h;rB0z
Th%zn2R B
package org.rut.util.algorithm; >V937
yuVs YV@"
import org.rut.util.algorithm.support.BubbleSort; GmG5[?)
import org.rut.util.algorithm.support.HeapSort; AdmC&!nH
import org.rut.util.algorithm.support.ImprovedMergeSort; :+Z%; Dc
import org.rut.util.algorithm.support.ImprovedQuickSort; 6mE\OS-I
import org.rut.util.algorithm.support.InsertSort; >Q/Dk7#
import org.rut.util.algorithm.support.MergeSort; VQs5"K"
import org.rut.util.algorithm.support.QuickSort; GeqPRah
import org.rut.util.algorithm.support.SelectionSort; :Al!1BJQ
import org.rut.util.algorithm.support.ShellSort; 5bIw?%dk(
SKtrtm
/** OVJ0}5P*
* @author treeroot ~dSr5LUD
* @since 2006-2-2 =-T]3!
* @version 1.0 fox6)Uot
*/ yX5\gO6G
public class SortUtil { FlQGgVN
public final static int INSERT = 1; @c#(.=
public final static int BUBBLE = 2; 7P T{lT
public final static int SELECTION = 3; *I+Q~4
public final static int SHELL = 4; ==B6qX8T
public final static int QUICK = 5; ,I9bNO,%JK
public final static int IMPROVED_QUICK = 6; BWNi [^]
public final static int MERGE = 7; >eaaaq9B-
public final static int IMPROVED_MERGE = 8; so; ]&
public final static int HEAP = 9; bLL2
\^LFkp
public static void sort(int[] data) { <$YlH@;)`a
sort(data, IMPROVED_QUICK); Lr+$_ t}r
} u?"Vm
private static String[] name={ #z(]xI)"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6LZCgdS{
}; H+#FSdy#
*v`eUQ:
private static Sort[] impl=new Sort[]{ Kq!3wb;
new InsertSort(), }b}m3i1
new BubbleSort(), jCY%|
new SelectionSort(), vX>)je5#
new ShellSort(), {I((p_
new QuickSort(), _GPe<H
new ImprovedQuickSort(), <%^&2UMg
new MergeSort(), *i,%,O96Nz
new ImprovedMergeSort(), xLE)/}y_7H
new HeapSort() ,+VGSd
}; 7^Uv7<pw
SJLis"8
public static String toString(int algorithm){ >!JS:5|
return name[algorithm-1]; TvM~y\s
} 2eogY#
[Pp'Ye~K@c
public static void sort(int[] data, int algorithm) { +t.b` U`-
impl[algorithm-1].sort(data); xo)P?-
} ]|@^1we
"4Nt\WQ
public static interface Sort { XZf$K_F&M
public void sort(int[] data); jdN`mosJ
} YUb_y^B^
T|$H#n}
public static void swap(int[] data, int i, int j) { *a)n62
int temp = data; mv><HqDL1
data = data[j]; TC('H[ ]
data[j] = temp; #mT"gs
} 5-V pJ
} -LSWmrj