[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; aa2&yc29hp
} W\:!v%C
int i1=l; wv>*g:El'
int i2=mid+1; zD:"O4ZM^^
for(int cur=l;cur<=r;cur++){ O-y/K2MC*
if(i1==mid+1) qZACX.Hw
data[cur]=temp[i2++]; =<R")D]4z
else if(i2>r) e3,TY.,Ay
data[cur]=temp[i1++]; -U~]Bugvh
else if(temp[i1] data[cur]=temp[i1++]; A!\ouKyayS
else Ppi/`X
data[cur]=temp[i2++]; 1Y4=D
} qPGpN0M`
} P&"8R
hJ$o+sl
} !|;^
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改进后的归并排序: 'g.9 goQ
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package org.rut.util.algorithm.support; cih@:=Qy
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import org.rut.util.algorithm.SortUtil; VI7f}
)Kkw$aQI"d
/** Z&9MtpC+N3
* @author treeroot 1$T;u~vg
* @since 2006-2-2 k=1([x
* @version 1.0 al/Mgo
*/ 9o5W\.A7[D
public class ImprovedMergeSort implements SortUtil.Sort { %Z9&zmO
.'N:]G@!
private static final int THRESHOLD = 10; ([SrIG>X
\^a(B{
/* t&}Z~Zp
* (non-Javadoc) gsFyZ
* Tlc3l}B*Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CZ*#FY
*/ Agt6G\n
public void sort(int[] data) { &J(+XJM%
int[] temp=new int[data.length]; 6/_] |4t
mergeSort(data,temp,0,data.length-1); IX@g].)C
} jej|B#?`
l3kYfq{";"
private void mergeSort(int[] data, int[] temp, int l, int r) { +TzZ
int i, j, k; D+edTAQ8
int mid = (l + r) / 2; ML@-@BaN
if (l == r) 0qP&hybL[(
return; !kCMw%[
if ((mid - l) >= THRESHOLD) b-4gHW
mergeSort(data, temp, l, mid); wMFo8;L
else -7jP'l=h
insertSort(data, l, mid - l + 1); J|4q9$
if ((r - mid) > THRESHOLD) xS.Rpx/8
mergeSort(data, temp, mid + 1, r); #=@H-ZuD7
else +/ s2;G
insertSort(data, mid + 1, r - mid); 4#hDt^N~
R-odc,P=
for (i = l; i <= mid; i++) { ~DY5`jV
temp = data; d'j8P
} hLF+_{\C|
for (j = 1; j <= r - mid; j++) { 0zH^yx:ma
temp[r - j + 1] = data[j + mid]; !;Hi9,<#7g
} DXX(qk)6
int a = temp[l]; xW|^2k
int b = temp[r]; w1Ar[ P
for (i = l, j = r, k = l; k <= r; k++) { },1**_#<Br
if (a < b) { vn oI.;H,
data[k] = temp[i++]; 0LI:R'P+P[
a = temp; _D{zB1d\0
} else { r=57,P(:Ca
data[k] = temp[j--]; jvfVB'Tmr
b = temp[j]; Bfh[C]yy
} b-Fv vA
} tF:'Y ~3 p
} Q I!c=:u
nT7{`aaQl
/** [HEqMBX=;
* @param data VjZ_L_U}
* @param l /rMxl(wD'
* @param i $7Sbz&)y3
*/ si`{>e~`6P
private void insertSort(int[] data, int start, int len) { @q=l H *=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WY=RJe2
} s=)0y$
} do3 BI4Q
} [h"#Gwb=;
} "= H.$ +
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堆排序： [y^)&L$=
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package org.rut.util.algorithm.support; _W@SCV)yH
7lP3\7wD@9
import org.rut.util.algorithm.SortUtil; fwR3=:5~
/t"p^9!^
/** }h+_kRQ
* @author treeroot TWv${m zE
* @since 2006-2-2 2m`4B_g A
* @version 1.0 c k~gB
*/ >)Ih[0~M
public class HeapSort implements SortUtil.Sort{ ]>utLi5dX
ZqI.n4:9
/* (non-Javadoc) TmN}TMhZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IKJ~sw~AQ
*/ O5"o/Y~m
public void sort(int[] data) { c[=%v]j:u
MaxHeap h=new MaxHeap(); # SmM5%
h.init(data); ~cE;k@
for(int i=0;i h.remove(); zs+[Aco)
System.arraycopy(h.queue,1,data,0,data.length); apW0(&\
} | ?6wlf
tE)%*z@<Lt
private static class MaxHeap{ xx}R6VKU.
" mKMym2
void init(int[] data){ >M` swEj
this.queue=new int[data.length+1]; Kd_WN;l
for(int i=0;i queue[++size]=data; )G(6=l*
fixUp(size); ^V^In-[!y:
} Kuh! b`9
} ]Ll<
Q]*YIb~D
private int size=0; /Vpd*obMB
cz_4cMgxu
private int[] queue; lYd#pNN
kndP?#> p1
public int get() { `I$qMw,@
return queue[1]; ;qI5GQ {
} l+'1>T.I
k&nhF9Y4
public void remove() { _ Ko0
SortUtil.swap(queue,1,size--); Isq3YY
fixDown(1); 9Ao0$|@b
} {GF>HHQb
file://fixdown ^qpa[6D6x
private void fixDown(int k) { vOYcS$,^X%
int j; l3aG#4jj
while ((j = k << 1) <= size) { [7Nn%eZC
if (j < size %26amp;%26amp; queue[j] j++; W7NHr5RC
if (queue[k]>queue[j]) file://不用交换 $XS0:C0
break; @4:cn
SortUtil.swap(queue,j,k); lwH&4K
k = j; Q^Ln`zMe
} ;(w=}s%]+
} `w Sg/
private void fixUp(int k) { Q, E!Ew3
while (k > 1) { ` n{rzenPX
int j = k >> 1; @C=, >+D
if (queue[j]>queue[k]) AK<ZP?0
break; V,qZF=}S
SortUtil.swap(queue,j,k); 'Rfvr7G/?
k = j; hoC}@8_
} i7~oZ)w
} U]sU b3
-b@E@uAX/
} !W:QLOe6F
c: *wev
} Y,D\_il_
hk ./G'E
SortUtil： `n-e.{O((
^J>28Q\S
package org.rut.util.algorithm; ^OG^% x"
}sy3Mrb
import org.rut.util.algorithm.support.BubbleSort; :yT~.AK}>1
import org.rut.util.algorithm.support.HeapSort; @ x*#7Y
import org.rut.util.algorithm.support.ImprovedMergeSort; +:&(Ag
import org.rut.util.algorithm.support.ImprovedQuickSort; o\]e}+1[o
import org.rut.util.algorithm.support.InsertSort; ,h/0:?R KW
import org.rut.util.algorithm.support.MergeSort; qw87B!D
import org.rut.util.algorithm.support.QuickSort; 8zj09T[
import org.rut.util.algorithm.support.SelectionSort; =< CH(4!
import org.rut.util.algorithm.support.ShellSort; -I=}SZ
XQ(`8Jl&^
/** dc&Qi_W
* @author treeroot 4d]
* @since 2006-2-2 f| N(~
* @version 1.0 bf;IJ|v^
*/ !hH6!G
public class SortUtil { kj0A%q#'}
public final static int INSERT = 1; [F/xU
public final static int BUBBLE = 2; N[pk@M\vX
public final static int SELECTION = 3; 0jq&i#yNB
public final static int SHELL = 4; XVv7W5/q]
public final static int QUICK = 5; %\b5)p
public final static int IMPROVED_QUICK = 6; WZ&#O#(eO`
public final static int MERGE = 7; 3al5Vu2:
public final static int IMPROVED_MERGE = 8; e9B,
public final static int HEAP = 9; 5h{Hf]A
/asyj="N7
public static void sort(int[] data) { &H4UVI
sort(data, IMPROVED_QUICK); 8%xtb6#7M
} [2\`Wh:%P
private static String[] name={ )i!)Tv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p`d:g BZ
}; ]hf4= gm
]ipVN
private static Sort[] impl=new Sort[]{ O_iX1@SW
new InsertSort(), Y#t"..mc'
new BubbleSort(), ONfJ"Rp3
new SelectionSort(), +$ -#V
new ShellSort(), ^cAJCbp7
new QuickSort(), '6WDs]\
new ImprovedQuickSort(), rLKDeB
new MergeSort(), WG}QLcP
new ImprovedMergeSort(), @pS[_!EqYz
new HeapSort() }bnkTC
}; pH~JPNng
{W4t]Ff
public static String toString(int algorithm){ ^#t<ILUa
return name[algorithm-1]; SQ1&n;M}f
} sIy$}_
"Q J-IRt&
public static void sort(int[] data, int algorithm) { '+QgZ>q"
impl[algorithm-1].sort(data); 9E#(iP
} oaXD^H\
,pG63&?j
public static interface Sort { '#Fh J%x
public void sort(int[] data); U92hv~\
} y(zU:.
$?GO|.59
public static void swap(int[] data, int i, int j) { Lul?@>T
int temp = data; VN".NEL
data = data[j]; uA,{C%?
data[j] = temp; 6FmgK"t8
} 2bC%P})m
} W2B=%`sC