[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; kR+7JUq]
} 68?>#o865
int i1=l; +SB>>
int i2=mid+1; :R-_EY$k6
for(int cur=l;cur<=r;cur++){ %/4_|.8u
if(i1==mid+1) ]vflx^<?
data[cur]=temp[i2++]; xZ]QT3U+
else if(i2>r) +n%d,Pz
data[cur]=temp[i1++]; k-N}tk/5
else if(temp[i1] data[cur]=temp[i1++]; y;if+
else IAHQT<]
data[cur]=temp[i2++]; Hl#?#A5
} d=p=eUd2
} Nz77" kC
dq{+-XaEk
} 7>E>`Nc6
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改进后的归并排序: Z[9t?ePL
i'QR-B&Z
package org.rut.util.algorithm.support; .iC!Ttr
N/!(`Z,
import org.rut.util.algorithm.SortUtil; ]$,3vYBf
oF~+L3&X
/** :4r{t?ytXw
* @author treeroot dBkM~"
* @since 2006-2-2 lhC^Upqw
* @version 1.0 GJ{XlH
*/ I&6M{,rnM
public class ImprovedMergeSort implements SortUtil.Sort { r;9 V7C
{4$aA*
private static final int THRESHOLD = 10; DDq?4
i-}Tt<^
/* TILH[r&Jg
* (non-Javadoc) JvsL]yRT
* p/qu4[Mm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P6I<M}p
*/ (!PsK:wc
public void sort(int[] data) { %g~&$oZmq
int[] temp=new int[data.length]; sU+8'&vBp
mergeSort(data,temp,0,data.length-1); 0v,fY2$c
} zM(-f|wVI)
@6 a'p
private void mergeSort(int[] data, int[] temp, int l, int r) { :}R,a=N
int i, j, k; y=aWSb2y'
int mid = (l + r) / 2; e*yl_iW
if (l == r) FHSFH>
return; Hr7?#ZX;e
if ((mid - l) >= THRESHOLD) va:<W H
mergeSort(data, temp, l, mid); O#k eoC4
else x_x_TEyyh
insertSort(data, l, mid - l + 1); w!pj);jy{
if ((r - mid) > THRESHOLD) GkIhPn(d
mergeSort(data, temp, mid + 1, r); cMrO@=b;
else )}7X4g6X
insertSort(data, mid + 1, r - mid); A>8~deZ9
g=KvCqJN
for (i = l; i <= mid; i++) { `fOp>S^Q4
temp = data; {b'
} sYfm]Faz
for (j = 1; j <= r - mid; j++) { )vUS).;S`
temp[r - j + 1] = data[j + mid]; |~ytAyw
} dC;&X g`
int a = temp[l]; ts% n tnvI
int b = temp[r]; ;.Ld6JRunw
for (i = l, j = r, k = l; k <= r; k++) { I4|"Ztw
if (a < b) { C23p1%#1
data[k] = temp[i++]; Vh1y]#w
a = temp; !Eg2#a?
} else { 052Cf dq
data[k] = temp[j--]; {P,hH~!
b = temp[j]; %gQUog
} V'gJtF
} 2$MoKOx8$
} bIlNA)g
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/** B9Mp3[
* @param data Y<jX[ET!
* @param l =''WA:,=h
* @param i Ir-QD!!<
*/ A|4om=MO
private void insertSort(int[] data, int start, int len) { 3AglvGK7{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a~J!G:(
} -LT!LBnEkf
} 8#HnV%|N
} jo0XF]
} ~]#-S20
<Y6zJ#BD
堆排序： `K:n=hpF
]R>NmjAI
package org.rut.util.algorithm.support; _BY+Tfol
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import org.rut.util.algorithm.SortUtil; z]SEPYq:
*>"NUHq
/** %6%mf>Guf
* @author treeroot }K@m4`T
* @since 2006-2-2 )-ojm$
* @version 1.0 NMfHrYHbh
*/ 4:S]n19nq
public class HeapSort implements SortUtil.Sort{ &ds+9A
xJAQ'ANr
/* (non-Javadoc) kI9I{ &J&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }!{R;,5/n
*/ \<(EV,m2
public void sort(int[] data) { Yi,`uJKh
MaxHeap h=new MaxHeap(); V9SL96'[I
h.init(data); S-}c_zbl;
for(int i=0;i h.remove(); ,*dLE
System.arraycopy(h.queue,1,data,0,data.length); 1pg#@h[|t
} \q*-9_M
@"BhKUoV$K
private static class MaxHeap{ jl>TZ)4}V
Qu,R6G
void init(int[] data){ +lfO4^V
this.queue=new int[data.length+1]; %gs?~Xl)]
for(int i=0;i queue[++size]=data; mj?Gc
fixUp(size); ~;]kqYIJ
} |1tpXpe
} i-w$-2w
^"p. 3Hy
private int size=0; VBix8|
I|c!:4
private int[] queue; Xp9I3nd|
)XavhS~Ff
public int get() { NJE*/_S
return queue[1]; EPH n"YK
} +or<(%o @
OJ"./*H
public void remove() { e ><0crb
SortUtil.swap(queue,1,size--); 7l$ u.[
fixDown(1); :N_]*>
} >qOG^{&x
file://fixdown Z'j[N4%BK
private void fixDown(int k) { qEXN}Pq<
int j; qPD(D{,f$
while ((j = k << 1) <= size) { g)^s+Y
if (j < size %26amp;%26amp; queue[j] j++; A.("jb@I
if (queue[k]>queue[j]) file://不用交换 8Th,C{
break; KpYezdPF)
SortUtil.swap(queue,j,k); HV)aVkr/&
k = j; &z1U0uk
} pZlsDM/=
} yc~<h/}#
private void fixUp(int k) { =k.%#h{
while (k > 1) { O^=+"O]
int j = k >> 1; x55W"q7
if (queue[j]>queue[k]) ?RS:I%bL
break; 2b"DkJj'
SortUtil.swap(queue,j,k); ]b;m~|9
k = j; fn,hP_
} !hZ: \&V
} \Z3K ~
d8vf kVB
} eK l;T
-$o0P'Vx
} 7`;f<QNo
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SortUtil： 3.?be.cq
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package org.rut.util.algorithm; nOL.%
r9&m^,U
import org.rut.util.algorithm.support.BubbleSort; yD7}
import org.rut.util.algorithm.support.HeapSort; kMurNA=
import org.rut.util.algorithm.support.ImprovedMergeSort; 7~QI4'e
import org.rut.util.algorithm.support.ImprovedQuickSort; ur8+k4]\"
import org.rut.util.algorithm.support.InsertSort; 5Y^"&h[/
import org.rut.util.algorithm.support.MergeSort; :K]7(y7>
import org.rut.util.algorithm.support.QuickSort; FMeBsI9pL
import org.rut.util.algorithm.support.SelectionSort; Wj^e)2%
import org.rut.util.algorithm.support.ShellSort; El5} f4sl
K2yNIq_
/** cbyzZ#WRb
* @author treeroot p9?kJKN
* @since 2006-2-2 ^@AyC"K
* @version 1.0 -)oUb=Lk{
*/ [,Go*r
public class SortUtil { }' AY#g
public final static int INSERT = 1; #l4T/`u'9!
public final static int BUBBLE = 2; EZ .3Z`
public final static int SELECTION = 3; )S%t)}
public final static int SHELL = 4; iBAP,cR?`
public final static int QUICK = 5; z``wqK
public final static int IMPROVED_QUICK = 6; /m"/#; ^l
public final static int MERGE = 7; <A)M^,#o
public final static int IMPROVED_MERGE = 8; aim\3y~
public final static int HEAP = 9; 8]&:'
T8z?_ *k
public static void sort(int[] data) { }Cu[x'J
sort(data, IMPROVED_QUICK); WM ?a1j
} UTyV6~
private static String[] name={ hk4t #Km
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {owuYVm
}; ( ~5M{Xh
r)'vn[A
private static Sort[] impl=new Sort[]{ |} b+$J
new InsertSort(), \6&Ml]1
new BubbleSort(), d6QrB"J`
new SelectionSort(), 9m$;C'}Z
new ShellSort(), <Pt?N2]A|
new QuickSort(), Z)W8Of_
new ImprovedQuickSort(), Blzvn19'h
new MergeSort(), :LNE?@
new ImprovedMergeSort(), h:362&?]
new HeapSort() xz"60xxY
}; `2s@O>RV
~h@@y5<4
public static String toString(int algorithm){ $q@d.Z>;
return name[algorithm-1]; 7amVnR1f
} "g"a-{8
,sAAV%">
public static void sort(int[] data, int algorithm) { @Uez2?
impl[algorithm-1].sort(data); TsaQR2J@
} 3MQZ)!6
11yXI[
public static interface Sort { 1W{N6+u
public void sort(int[] data); El<*)
} =9a2+v0
V+ ("kz*
public static void swap(int[] data, int i, int j) { !g]5y=
int temp = data; t Y
data = data[j]; XJ4f;U
data[j] = temp; v<!S_7h
} {g%N(2
} BUBx}dbCM