[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; \\xoOA.
} [s"xOP9R
int i1=l; AfB,`l`k
int i2=mid+1; s&TPG0W
for(int cur=l;cur<=r;cur++){ AKu]c-
if(i1==mid+1) [<rV "g
data[cur]=temp[i2++]; .liVlo@
else if(i2>r) M:rE^El
data[cur]=temp[i1++]; &( aw
else if(temp[i1] data[cur]=temp[i1++]; /{|JQ'gqX
else ZuH@qq\
data[cur]=temp[i2++]; 6C7|e00v
} /'O? 8X<
} yp9vgUs
n Hz Xp:"
} '9.L5*wh]
!W^P|:Qt
改进后的归并排序: ~x4]^XS
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package org.rut.util.algorithm.support; wO.T"x%X
lf-1;6nyk"
import org.rut.util.algorithm.SortUtil; y<|8OTT
9#cPEbb~
/** ,%6!8vX
* @author treeroot %=e^MN1
* @since 2006-2-2 h&}z@
* @version 1.0 {_C2c{
*/ TuG%oV}
public class ImprovedMergeSort implements SortUtil.Sort { c'O"</
LYhjI
private static final int THRESHOLD = 10; <5BNcl\ZL
-Ph"#R&
/* |q!O~<H@
* (non-Javadoc) 3:qn\"Hj
* K-<<s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C( wZjO?N
*/ Bc&Y[u-n
public void sort(int[] data) { J@$KF GUs
int[] temp=new int[data.length]; = Zi'L48
mergeSort(data,temp,0,data.length-1); 1#}}:
} '8Wu9 phT
cb82k[L6
private void mergeSort(int[] data, int[] temp, int l, int r) { zpgRK4p,I"
int i, j, k; xaI)d/
int mid = (l + r) / 2; 'nJ,mZx
if (l == r) B5v5D[ o5
return; CT{mzC8
if ((mid - l) >= THRESHOLD) c'md)nD2M
mergeSort(data, temp, l, mid); !KC4[;Y
else Y+)qb);
insertSort(data, l, mid - l + 1); NWue;u^
if ((r - mid) > THRESHOLD) ze"`5z26|
mergeSort(data, temp, mid + 1, r); _D"V^4^yqu
else hik.c3
insertSort(data, mid + 1, r - mid); ~`yO@f;D
XmJ?oPr7
for (i = l; i <= mid; i++) { ^i[bo3
temp = data; ,,8'29yEq
} bt'lT
for (j = 1; j <= r - mid; j++) { /JjSx/
temp[r - j + 1] = data[j + mid]; s.$:.*k
} hm,H3pN
int a = temp[l]; VW\xuP
int b = temp[r]; Q3<ctd\]Y
for (i = l, j = r, k = l; k <= r; k++) { dt5`UBvUg
if (a < b) { Lo*vt42{4
data[k] = temp[i++]; r;~7$B)
a = temp; x~?|bnM#3
} else { F]GX;<`
data[k] = temp[j--]; JuDadIrd{
b = temp[j]; QCJf
} TUN6`/"
} w!r.MWE
} xey?.2K1A
+<Y1`kV)
/** XyYP!<].C
* @param data @rE+H 5
* @param l &SMM<^P.
* @param i o0kKf+[
*/ RveEA/&&
private void insertSort(int[] data, int start, int len) { .A F94OlE/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ri/D>[
} ,l#f6H7p
} k r5'E#
} Wgm{ ]9Q
} wvI}|c
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堆排序： J9&#);(
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package org.rut.util.algorithm.support; _iH:>2p5R
lm8<0*;,
import org.rut.util.algorithm.SortUtil; ({<qs}H"
Og1Hg B3v
/** Wb#ON|.2
* @author treeroot ~p{ fl?
* @since 2006-2-2 u}-)ywX
* @version 1.0 5Z_aN|Xn
*/ xJ^pqb
public class HeapSort implements SortUtil.Sort{ V^kl_!@
NchEay;`
/* (non-Javadoc) Nazr4QU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uA%cie
*/ $aY:Z_s
public void sort(int[] data) { Lpk`qJ
MaxHeap h=new MaxHeap(); es1'z.UJ
h.init(data); `L @`l
for(int i=0;i h.remove(); LIh71Vg/cc
System.arraycopy(h.queue,1,data,0,data.length); ,-)ww:
} 'ALe>\WO
2 W Wr./q
private static class MaxHeap{ |DUOyQ
;m}o$`
void init(int[] data){ <-xu*Fc
this.queue=new int[data.length+1]; pW5PF)([
for(int i=0;i queue[++size]=data; +IM6 GeH
fixUp(size); XBos^Q
} 71G00@&w9D
} +~?K@n
(*G'~gSX
private int size=0; eB5<N?;s
VMW<?V 2Z
private int[] queue; u4~(0
nE"0?VNW$
public int get() { M7gM#bv>L
return queue[1]; 2KSt4oa
} 1A{iUddR
QW>(LGG=
public void remove() { h<FEe~
SortUtil.swap(queue,1,size--); 0hX@ta[Up
fixDown(1); ]*\<k
} :snn-e0l
file://fixdown o[>p
private void fixDown(int k) { $F~hL?"?
int j; _R;+}1G/
while ((j = k << 1) <= size) { 7.(vog"I)
if (j < size %26amp;%26amp; queue[j] j++; Eq'oy~.oV
if (queue[k]>queue[j]) file://不用交换 6N'HXL UlQ
break; /[Sy;wn
SortUtil.swap(queue,j,k); 3bMUsyJ2
k = j; Xj;5i Vq
} %M;{+90p>t
} d5tpw$A
private void fixUp(int k) { -O>*` O>M
while (k > 1) { !GBGC|avE
int j = k >> 1; qYR+qSAJP
if (queue[j]>queue[k]) !Mk:rO-L
break; aoS]Qp
SortUtil.swap(queue,j,k); 5A*'@Fr'G
k = j; 0 ;ov^]
} cRC)99HP
} m7~[f7U
sYY=MD
} b{Kw.?85
k0R;1lZ0n
} 2\=cv
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SortUtil： 9 ulr6
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package org.rut.util.algorithm; 1MzOHE
^,KN@
import org.rut.util.algorithm.support.BubbleSort; wuTCdBu6hU
import org.rut.util.algorithm.support.HeapSort; J#y?^Qm$)<
import org.rut.util.algorithm.support.ImprovedMergeSort; u3H2\<
import org.rut.util.algorithm.support.ImprovedQuickSort; R!.HS0i.
import org.rut.util.algorithm.support.InsertSort; 0yxMIX
import org.rut.util.algorithm.support.MergeSort; 4c=oAL
import org.rut.util.algorithm.support.QuickSort; ywV8s|o
import org.rut.util.algorithm.support.SelectionSort; #Rdq^TGMi;
import org.rut.util.algorithm.support.ShellSort; weiqt *,8
_"`U.!3*
/** (FAd'$lhX}
* @author treeroot <XxFR
* @since 2006-2-2 ?$^qcpJCp
* @version 1.0 hrRX=
*/ A fctycQ-
public class SortUtil { KCed!OJ+
public final static int INSERT = 1; S,,3h0$X
public final static int BUBBLE = 2; t9()?6H\
public final static int SELECTION = 3; s:/.:e_PU
public final static int SHELL = 4; UI:{*N**Z
public final static int QUICK = 5; `$\Y,9E}x
public final static int IMPROVED_QUICK = 6; _r|$H_#
public final static int MERGE = 7; M_4g%uHG
public final static int IMPROVED_MERGE = 8; a".uS4x
public final static int HEAP = 9; 0fPqO2
%?EOD=e=
public static void sort(int[] data) { B"I>mw
sort(data, IMPROVED_QUICK); :*!u\lV\
} Y2Y2>^
private static String[] name={ 0ZV)Y<DJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Cs %-f"
}; hoihdVjv
0PnW|N0
private static Sort[] impl=new Sort[]{ soZw""|v
new InsertSort(), p\8cl/~
new BubbleSort(), ^F~e?^s
new SelectionSort(), ]Nvtiw 6
new ShellSort(), 6mBX{-Z[
new QuickSort(), 8Db~OYVJG
new ImprovedQuickSort(), u hP0Zwn
new MergeSort(), ;NRT a*
new ImprovedMergeSort(), iEki<e/
new HeapSort() 2`vCQV
}; C<fNIc~.
<E BgHD)
public static String toString(int algorithm){ \sC0om,
return name[algorithm-1]; ,/W<E
} KF'H|)!K
*4qsM,t
public static void sort(int[] data, int algorithm) { &bj :,$@
impl[algorithm-1].sort(data); =tH+e7it
} &U xN.vl
NI(`o8fN
public static interface Sort { GGF;T&DWad
public void sort(int[] data); Xt=&
} @\!wW-:A
=pcj{B{qa
public static void swap(int[] data, int i, int j) { Mn~A;=%qF
int temp = data; dY\"'LtF
data = data[j]; =b%J@}m`&
data[j] = temp; yK?~XV:
} ;*W]]4fy
} -t6d`p;dR