[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; HmXxM:[4;
} 6heK8*.T
int i1=l; dsEvpa$?
int i2=mid+1; uvDOTRf
for(int cur=l;cur<=r;cur++){ b#709VHm
if(i1==mid+1) axG%@5
data[cur]=temp[i2++]; 6hcs)X7m
else if(i2>r) _576Qa'rm
data[cur]=temp[i1++]; Y}vV.q
else if(temp[i1] data[cur]=temp[i1++]; P EzT|uY
else ]_>38f7h
data[cur]=temp[i2++]; |}l/6WHB
} y]Q/(O
} ?zo7.R-Vac
s$^ 2Cuhv
} *R&77 o7
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改进后的归并排序: )x5w`N]lm
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package org.rut.util.algorithm.support; T5[(vTp
j%!xb><
import org.rut.util.algorithm.SortUtil; *E@as
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/** X/!Y mV!
* @author treeroot ZA4sEVHW
* @since 2006-2-2 &WbHM)_n
* @version 1.0 'pAq;2AA
*/ 2J(,Xf
public class ImprovedMergeSort implements SortUtil.Sort { wh]v{Fi'
FOa2VP%
private static final int THRESHOLD = 10; O|;|7fCB\
Dk~ JH9#
/* J@Nq
* (non-Javadoc) f+Bv8 g
* &>@EfW](
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n%dh|j2u
*/ Xt*h2&
public void sort(int[] data) { :JxuaM8
int[] temp=new int[data.length]; g*U[?I"sC
mergeSort(data,temp,0,data.length-1); h>NuQo*
} H|N,nkhH}
4!+IsT
private void mergeSort(int[] data, int[] temp, int l, int r) { a '<B0'
int i, j, k; uY)|
int mid = (l + r) / 2; p-8x>dmP(
if (l == r) i;<H^\%
return; ~ Q;qRx
if ((mid - l) >= THRESHOLD) :2&W9v
mergeSort(data, temp, l, mid); 3}?]G8iL?L
else z!9w Lo^r
insertSort(data, l, mid - l + 1); vP&JL~
if ((r - mid) > THRESHOLD) c(S66lp
mergeSort(data, temp, mid + 1, r); Xpf:I
else SnW>`
insertSort(data, mid + 1, r - mid); x_KJCU
)mXu{uowr
for (i = l; i <= mid; i++) { Pu|3_3^
temp = data; X[iQ%Y$/n
} 8DJoQl9
for (j = 1; j <= r - mid; j++) { RC]-9gd3Q
temp[r - j + 1] = data[j + mid]; Bt-2S,c,o
} )1!*N)$
int a = temp[l]; $>PV6
int b = temp[r]; k| ,F/:
for (i = l, j = r, k = l; k <= r; k++) { w ]$Hr
if (a < b) { \ssqIRk
data[k] = temp[i++]; _QOZ`st
a = temp; ;l=ZW
} else { ;bt%TxuKb
data[k] = temp[j--]; 0h~7"qUF@
b = temp[j]; ZncJ
} n[`FoY
} rXu^]CK *G
} N(^ q%eHp
]eZrb%B.
/** $4&e{fLt|v
* @param data 4XXuj
* @param l S U$U
* @param i ify}xv
*/ $Q< >MB7
private void insertSort(int[] data, int start, int len) { _"0Bg3Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j]'7"b5
} jUCrj'
} RW04>oxVn
} 8!(09gW'>
} g/6>>p`J
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堆排序： m_g2Cep
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package org.rut.util.algorithm.support; Dm0Ts~
7awh__@
import org.rut.util.algorithm.SortUtil; y)e8pPDG
ij+)U`
/** zBTyRL l
* @author treeroot TO~Z6NA0
* @since 2006-2-2 h#7p&F
* @version 1.0 .~t.B!rVSB
*/ B6#^a
public class HeapSort implements SortUtil.Sort{ YA[\|I33
HSsG0&'-Y
/* (non-Javadoc) ~dc~<hK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hYS}PE
*/ HXp$\%A)
public void sort(int[] data) { 85GU~.
MaxHeap h=new MaxHeap(); \T]'d@Wyd
h.init(data); yz7X7mAo
for(int i=0;i h.remove(); 78fFAN`
System.arraycopy(h.queue,1,data,0,data.length); >q7/zl
} $vK(Qm
M4`.[P4
private static class MaxHeap{ e;G}T%W
&<RK=e'*x
void init(int[] data){ $]t3pAI[H0
this.queue=new int[data.length+1]; Ufr,6IX
for(int i=0;i queue[++size]=data; vle`#c.
fixUp(size); he\ pW5p
} AkE(I16Uy~
} &;wNJ)Uc
'NYW`,
private int size=0; FZ~^cK9g:
o/~Rf1
private int[] queue; jC}2>_#m(
=)mA.j}E2
public int get() { Qf#=Y j
return queue[1]; 1@W*fVn
} vnS;T+NZSC
Yw_^]:~
public void remove() { %;MM+xVVX
SortUtil.swap(queue,1,size--); :.bBV]6q
fixDown(1); 0 F-db
} 0wnC"2GUX
file://fixdown eWWtMnq
private void fixDown(int k) { O@-|_N*;K
int j; o<8SiVC2
while ((j = k << 1) <= size) { IJ E{JH
if (j < size %26amp;%26amp; queue[j] j++; {&,MkWgG
if (queue[k]>queue[j]) file://不用交换 '}BYMEd/m%
break; :-)H tyzf
SortUtil.swap(queue,j,k); GMW,+
k = j; ;*[oi
} 'S#D+oF(1~
} gO%oA} !i
private void fixUp(int k) { eB2a1<S&@
while (k > 1) { ZXH{9hxd
int j = k >> 1; 8ZL9>"%l
if (queue[j]>queue[k]) `),ACkU>U
break; >1S39n5z.
SortUtil.swap(queue,j,k); R8N*. [
k = j; ?w5>Z/V
} 7Q>bJ Ek7
} ]Mb:zs<r
![Ll$Lr
} UR<a7j"@2
q>f|1Pf
} b;jr;I
w tSX(LNY
SortUtil： }=$>w@mJ
Q nmv?YXS
package org.rut.util.algorithm; nXM[#~
4#Cm5xAt6
import org.rut.util.algorithm.support.BubbleSort; 1WUlBr/k
import org.rut.util.algorithm.support.HeapSort; ":W$$w<
import org.rut.util.algorithm.support.ImprovedMergeSort; oxZXY]$y
import org.rut.util.algorithm.support.ImprovedQuickSort; =QS%D*.|D
import org.rut.util.algorithm.support.InsertSort; 0'zX6%
import org.rut.util.algorithm.support.MergeSort; k@}g?X`8
import org.rut.util.algorithm.support.QuickSort; witx_r
import org.rut.util.algorithm.support.SelectionSort; P&sYS<9q
import org.rut.util.algorithm.support.ShellSort; U^ ;H{S
JyDg=%-$2
/** e+O502]
* @author treeroot yt[*4gF4
* @since 2006-2-2 )SzgMbF6
* @version 1.0 ^u-;VoK
*/ A Qm!7,
public class SortUtil { 1w}DfI
public final static int INSERT = 1; Lhmb= @
public final static int BUBBLE = 2; cxz\1Vphd
public final static int SELECTION = 3; sh)[|?7z
public final static int SHELL = 4; TxP8&!d
public final static int QUICK = 5; Btyp=wfN[
public final static int IMPROVED_QUICK = 6; 6H^=\
public final static int MERGE = 7; p(fL' J
public final static int IMPROVED_MERGE = 8; WPDi)UX
public final static int HEAP = 9; +j(7.6ia
:CGh$d] +
public static void sort(int[] data) { CfEACH4_
sort(data, IMPROVED_QUICK); H:]'r5sw
} Wa<SYJ
private static String[] name={ $ #bWh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o2R&s@%0@B
}; c"oJcp
i;fU],aK!
private static Sort[] impl=new Sort[]{ se*!OiOt
new InsertSort(), =4#p|OZP
new BubbleSort(), 9s&dN
new SelectionSort(), C`["4
new ShellSort(), SYA0Hiw7P
new QuickSort(), Xk`'m[
new ImprovedQuickSort(), cCv@fks
new MergeSort(), -Ra-Ux
new ImprovedMergeSort(), _<u>? Qt
new HeapSort() >)bn #5
}; GQ6~Si2
5%]O'h
public static String toString(int algorithm){ TT^L)d
return name[algorithm-1]; \{.c0
} N) '|l0x0
~;vt{pk
public static void sort(int[] data, int algorithm) { r1[#_A`Yn
impl[algorithm-1].sort(data); 1s-=zs
} -=GmI1:=$4
#Q/xQ`+|.
public static interface Sort { <lP5}F87
public void sort(int[] data); e4<St`K
} +[7 DRT:
51 "v`O+
public static void swap(int[] data, int i, int j) { IHwoG(A~<
int temp = data; z=C<@ki`
data = data[j]; ZVDi;
data[j] = temp; u-R;rf5%k
} IgEVz^W?h
} ^K0oJg.E