[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; 22M1j5
} aYS!xh206
int i1=l; 2:7zG"$
int i2=mid+1; n+q!l&&
for(int cur=l;cur<=r;cur++){ Zxs|%bQ
if(i1==mid+1) !()$8
data[cur]=temp[i2++]; wL 4dTc
else if(i2>r) _zn.K&I-*k
data[cur]=temp[i1++]; *<jAiB,O*
else if(temp[i1] data[cur]=temp[i1++]; Q1 $^v0-)
else ]J$eDbaEjT
data[cur]=temp[i2++]; >\=3:gb:
} "wnzo,
} h"_;IUZ!
yt=3sq
} 7gvnl~C(
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改进后的归并排序: hYNY"VB
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package org.rut.util.algorithm.support; q?DTMKx
vZ&T}H~8
import org.rut.util.algorithm.SortUtil; iwp{%FF
CpeU5 o@
/** 4NzwE(
* @author treeroot -$jEfi4I
* @since 2006-2-2 W~~7C,!
* @version 1.0 ;HJLs2bP
*/ W=Mb
public class ImprovedMergeSort implements SortUtil.Sort { v)l8@.
6S*exw
private static final int THRESHOLD = 10; ^O<&fD
J|kR5'?x
/* J^}V|#
* (non-Javadoc) +)<wDDC_
* wKYZa# u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KB`!Sj\
*/ q6SXWT'Sa
public void sort(int[] data) { MVTMwwO\[
int[] temp=new int[data.length]; IE&!YP(U(
mergeSort(data,temp,0,data.length-1); Vp*KfS]
} F6OpN"UM'
O%(fx!c`
private void mergeSort(int[] data, int[] temp, int l, int r) { 'y2nN=CN
int i, j, k; PQnF
int mid = (l + r) / 2; !^=*Jq>
if (l == r) ,dov<U[ia
return; (-xS?8x$
if ((mid - l) >= THRESHOLD) NI#:|}CYS
mergeSort(data, temp, l, mid); ,5kKimTt
else 7;sj%U^'l
insertSort(data, l, mid - l + 1); bRJMYs
if ((r - mid) > THRESHOLD) 1+qw$T
mergeSort(data, temp, mid + 1, r); ;8*`{F[
else 9XyYHi
insertSort(data, mid + 1, r - mid); 8U>B~9:JO
L[H5NUG!
for (i = l; i <= mid; i++) { KJ=6n%6
temp = data; ^xHTWg%9
} v'qG26
for (j = 1; j <= r - mid; j++) { Co9QW/'i
temp[r - j + 1] = data[j + mid]; ^ZhG>L*
} fA<[f
int a = temp[l]; (m.ob+D
int b = temp[r]; 8a="/J
for (i = l, j = r, k = l; k <= r; k++) { XKttZOiGT
if (a < b) { i;jw\ed
data[k] = temp[i++]; QM O!v;
a = temp; QP)pgAc
} else { %Nhx;{
data[k] = temp[j--]; ,TPISs
b = temp[j]; SAK!z!t
} L%K\C
} c^u"I'#Q
} ,M6Sy]Aj
#qI= Z0Y
/** {u\Mj
* @param data "@d[h,TM
* @param l wsN?[=l{s
* @param i /VzI'^
*/ J(%0z:exs
private void insertSort(int[] data, int start, int len) { \"^w'ng
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m&\h4$[kql
} l>{R`BZ/
} +~roU{& o
} ?~;:jz|9<'
} ]dk8lZ;bo
("+}=*?OF3
堆排序： kc @[9eV
zG9Y!SY\-
package org.rut.util.algorithm.support; !n$tr
@,u/w4
import org.rut.util.algorithm.SortUtil; kRD%b[*d
H nUYqhZS
/** `v}%33$hA
* @author treeroot 8J~1-;
* @since 2006-2-2 !Mim@!5M
* @version 1.0 &f^l^K5:
*/ Jn3An
public class HeapSort implements SortUtil.Sort{ *l;B\=KR
y^Kph# F"
/* (non-Javadoc) 4Hn`'+b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >teOm?@U
*/ \ZhfgE8{%
public void sort(int[] data) { ~r$jza~o(
MaxHeap h=new MaxHeap(); ]Xf% ,iu
h.init(data); @`Eg(
for(int i=0;i h.remove(); gV`=jAE_
System.arraycopy(h.queue,1,data,0,data.length); [],1lRYI9_
} 13%t"-@bh
l)w Hl%p
private static class MaxHeap{ J.dLPKU;-
t|!j2<e
void init(int[] data){ z=_Ef3`M
this.queue=new int[data.length+1]; \,&co
for(int i=0;i queue[++size]=data; Nl9I*x^e
fixUp(size); f0<%&2ym
} ]oV{t<0a
} QgD g}\P
P=+nB*hG
private int size=0; )aao[_ZS
H_Kj7(=&>
private int[] queue; ?wF'<kEH
|),'9
public int get() { +sx 8t
return queue[1]; M=*bh5t%]
} x^y"<
qYf |Gv
public void remove() { 7aYn0_NKp
SortUtil.swap(queue,1,size--); MXiQ1x
fixDown(1); xD /9F18
} aKlUX
file://fixdown ;?~$h-9)
private void fixDown(int k) { |*Yf.-
int j; 4)4+M
while ((j = k << 1) <= size) { wwoweztER
if (j < size %26amp;%26amp; queue[j] j++; ,i6RE
if (queue[k]>queue[j]) file://不用交换 `^Eae
break; N2$I}q%
SortUtil.swap(queue,j,k); Q33"u/-v
k = j; }%`~T>/
} )T66<UDK|
} ]I.n\2R]om
private void fixUp(int k) { d90Z,nex
while (k > 1) { [kzd(u
int j = k >> 1; kWb2F7m
if (queue[j]>queue[k]) ;v~-'*0
break; (NK9vW4F
SortUtil.swap(queue,j,k); he-Ji
k = j; zYv#:>C8
} q4$+H{xB
} F3lw@b3])
xc:!cA{V
} -;XKcS7Ue
Hiv!BV|
} y}K\%;`[a
s(LT
SortUtil： ~i_Tw#}
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package org.rut.util.algorithm; Rek -`ki5F
0\~Z5k`IT
import org.rut.util.algorithm.support.BubbleSort; q )lnS )
import org.rut.util.algorithm.support.HeapSort; FvuGup`w
import org.rut.util.algorithm.support.ImprovedMergeSort; bo=ZM9
import org.rut.util.algorithm.support.ImprovedQuickSort; !.<T"8BUpv
import org.rut.util.algorithm.support.InsertSort; H,<7G;FPT
import org.rut.util.algorithm.support.MergeSort; g3sUl&K
import org.rut.util.algorithm.support.QuickSort; b7\ cxgRq
import org.rut.util.algorithm.support.SelectionSort; q7m6&2$[
import org.rut.util.algorithm.support.ShellSort; vF/ =J
)|<_cwz
/** 4YMX|1wd)
* @author treeroot )Vk6;__
* @since 2006-2-2 ";w}3+R
* @version 1.0 #W2[
*/ |nk3^;Yf
public class SortUtil { l\!-2 T6Y
public final static int INSERT = 1; ]G}B 0u3
public final static int BUBBLE = 2; 's!-80sd
public final static int SELECTION = 3; ExXM:1 e26
public final static int SHELL = 4; 0l#)fJo
public final static int QUICK = 5; RF!1oZ
public final static int IMPROVED_QUICK = 6; :9Y$'+ <&H
public final static int MERGE = 7; %_aMl
public final static int IMPROVED_MERGE = 8; w$5A|%Y+V}
public final static int HEAP = 9; PS" .R_"
daAyx-
public static void sort(int[] data) { TfZ6F8|B
sort(data, IMPROVED_QUICK); MZSxQ8
} Ti;Ijcq8
private static String[] name={ fKa\7{R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xg{HQQ|TC
}; j?|* LT$%7
hc$@J}`
private static Sort[] impl=new Sort[]{ ~ZlC '
new InsertSort(), '7B"(dA&C
new BubbleSort(), tNmy& nsA
new SelectionSort(), !sA_?2$
new ShellSort(), yWHiw<
new QuickSort(), Zx?b<"k
new ImprovedQuickSort(), 6ZqgY1
new MergeSort(), 0gF!!m
new ImprovedMergeSort(), cM&'[CI
new HeapSort() `wTlyS3[
}; &Rz, J]
2o[IHO]
public static String toString(int algorithm){ GfyX'(ge
return name[algorithm-1]; z&$/EP-
} &yz&LNn'
Er:?M_ev
public static void sort(int[] data, int algorithm) { =S]a&*M
impl[algorithm-1].sort(data); Px'!;
} F[7x*-NO-
` e{BId
public static interface Sort { B7-RU<n
public void sort(int[] data); 9f}XRz
} )06iV
"n\%_'R\hH
public static void swap(int[] data, int i, int j) { E)t
int temp = data; 8C.!V =@\
data = data[j]; 6j8<Q 2
data[j] = temp; jUjr6b"
} PI?j_8
} ^!;=6}YR